mozilla-central/gfx/cairo/cairo/src/cairo-pdf-surface.c (file symbol)

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/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
/* cairo - a vector graphics library with display and print output
*
* Copyright © 2004 Red Hat, Inc
* Copyright © 2006 Red Hat, Inc
* Copyright © 2007, 2008 Adrian Johnson
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*
* The Original Code is the cairo graphics library.
*
* The Initial Developer of the Original Code is University of Southern
* California.
*
* Contributor(s):
* Kristian Høgsberg <krh@redhat.com>
* Carl Worth <cworth@cworth.org>
* Adrian Johnson <ajohnson@redneon.com>
*/
#define _DEFAULT_SOURCE /* for snprintf() */
#include "cairoint.h"
#include "cairo-pdf.h"
#include "cairo-pdf-surface-private.h"
#include "cairo-pdf-operators-private.h"
#include "cairo-pdf-shading-private.h"
#include "cairo-array-private.h"
#include "cairo-analysis-surface-private.h"
#include "cairo-composite-rectangles-private.h"
#include "cairo-default-context-private.h"
#include "cairo-error-private.h"
#include "cairo-image-surface-inline.h"
#include "cairo-image-info-private.h"
#include "cairo-recording-surface-private.h"
#include "cairo-output-stream-private.h"
#include "cairo-paginated-private.h"
#include "cairo-scaled-font-subsets-private.h"
#include "cairo-surface-clipper-private.h"
#include "cairo-surface-snapshot-inline.h"
#include "cairo-surface-subsurface-private.h"
#include "cairo-type3-glyph-surface-private.h"
#include <zlib.h>
/*
* Page Structure of the Generated PDF:
*
* Each page requiring fallbacks images contains a knockout group at
* the top level. The first operation of the knockout group paints a
* group containing all the supported drawing operations. Fallback
* images (if any) are painted in the knockout group. This ensures
* that fallback images do not composite with any content under the
* fallback images.
*
* Streams:
*
* This PDF surface has three types of streams:
* - PDF Stream
* - Content Stream
* - Group Stream
* - Object stream
*
* Calling _cairo_output_stream_printf (surface->output, ...) will
* write to the currently open stream.
*
* PDF Stream:
* A PDF Stream may be opened and closed with the following functions:
* _cairo_pdf_surface_open stream ()
* _cairo_pdf_surface_close_stream ()
*
* PDF Streams are written directly to the PDF file. They are used for
* fonts, images and patterns.
*
* Content Stream:
* The Content Stream is opened and closed with the following functions:
* _cairo_pdf_surface_open_content_stream ()
* _cairo_pdf_surface_close_content_stream ()
*
* The Content Stream contains the text and graphics operators.
*
* Group Stream:
* A Group Stream may be opened and closed with the following functions:
* _cairo_pdf_surface_open_group ()
* _cairo_pdf_surface_close_group ()
*
* A Group Stream is a Form XObject. It is used for short sequences
* of operators. As the content is very short the group is stored in
* memory until it is closed. This allows some optimization such as
* including the Resource dictionary and stream length inside the
* XObject instead of using an indirect object.
*
* Object Stream (PDF 1.5)
* An Object Stream may be opened and closed with the following functions:
* _cairo_pdf_surface_open_object_stream ()
* _cairo_pdf_surface_close_object_stream ()
*
* An Object Stream contains one or more objects compressed into a stream.
* Only non stream objects are permitted. When emitting objects intended for
* the Object Stream, enclose the emit object operation with
* _cairo_pdf_surface_object_begin()/_cairo_pdf_surface_object_end().
*/
/**
* SECTION:cairo-pdf
* @Title: PDF Surfaces
* @Short_Description: Rendering PDF documents
* @See_Also: #cairo_surface_t
*
* The PDF surface is used to render cairo graphics to Adobe
* PDF files and is a multi-page vector surface backend.
*
* The following mime types are supported: %CAIRO_MIME_TYPE_JPEG,
* %CAIRO_MIME_TYPE_JP2, %CAIRO_MIME_TYPE_UNIQUE_ID,
* %CAIRO_MIME_TYPE_JBIG2, %CAIRO_MIME_TYPE_JBIG2_GLOBAL,
* %CAIRO_MIME_TYPE_JBIG2_GLOBAL_ID,
* %CAIRO_MIME_TYPE_CCITT_FAX, %CAIRO_MIME_TYPE_CCITT_FAX_PARAMS.
*
* # JBIG2 Images #
* JBIG2 data in PDF must be in the embedded format as described in
* ISO/IEC 11544. Image specific JBIG2 data must be in
* %CAIRO_MIME_TYPE_JBIG2. Any global segments in the JBIG2 data
* (segments with page association field set to 0) must be in
* %CAIRO_MIME_TYPE_JBIG2_GLOBAL. The global data may be shared by
* multiple images. All images sharing the same global data must set
* %CAIRO_MIME_TYPE_JBIG2_GLOBAL_ID to a unique identifier. At least
* one of the images must provide the global data using
* %CAIRO_MIME_TYPE_JBIG2_GLOBAL. The global data will only be
* embedded once and shared by all JBIG2 images with the same
* %CAIRO_MIME_TYPE_JBIG2_GLOBAL_ID.
*
* # CCITT Fax Images # {#ccitt}
* The %CAIRO_MIME_TYPE_CCITT_FAX mime data requires a number of decoding
* parameters These parameters are specified using %CAIRO_MIME_TYPE_CCITT_FAX_PARAMS.
*
* %CAIRO_MIME_TYPE_CCITT_FAX_PARAMS mime data must contain a string of the form
* "param1=value1 param2=value2 ...".
*
* @Columns: [required] An integer specifying the width of the image in pixels.
*
* @Rows: [required] An integer specifying the height of the image in scan lines.
*
* @K: [optional] An integer identifying the encoding scheme used. < 0
* is 2 dimensional Group 4, = 0 is Group3 1 dimensional, > 0 is mixed 1
* and 2 dimensional encoding. Default is 0.
*
* @EndOfLine: [optional] If true end-of-line bit patterns are present. Default is false.
*
* @EncodedByteAlign: [optional] If true the end of line is padded
* with 0 bits so the next line begins on a byte boundary. Default is false.
*
* @EndOfBlock: [optional] If true the data contains an end-of-block pattern. Default is true.
*
* @BlackIs1: [optional] If true 1 bits are black pixels. Default is false.
*
* @DamagedRowsBeforeError: [optional] An integer specifying the
* number of damages rows tolerated before an error occurs. Default is 0.
*
* Boolean values may be "true" or "false", or 1 or 0.
*
* These parameters are the same as the CCITTFaxDecode parameters in the
* [PostScript Language Reference](https://www.adobe.com/products/postscript/pdfs/PLRM.pdf)
* Refer to these documents for further details.
*
* An example %CAIRO_MIME_TYPE_CCITT_FAX_PARAMS string is:
*
* <programlisting>
* "Columns=10230 Rows=40000 K=1 EndOfLine=true EncodedByteAlign=1 BlackIs1=false"
* </programlisting>
*
**/
static cairo_bool_t
_cairo_pdf_surface_get_extents (void *abstract_surface,
cairo_rectangle_int_t *rectangle);
/**
* CAIRO_HAS_PDF_SURFACE:
*
* Defined if the PDF surface backend is available.
* This macro can be used to conditionally compile backend-specific code.
*
* Since: 1.2
**/
static const cairo_pdf_version_t _cairo_pdf_versions[] =
{
CAIRO_PDF_VERSION_1_4,
CAIRO_PDF_VERSION_1_5
};
#define CAIRO_PDF_VERSION_LAST ARRAY_LENGTH (_cairo_pdf_versions)
static const char * _cairo_pdf_version_strings[CAIRO_PDF_VERSION_LAST] =
{
"PDF 1.4",
"PDF 1.5"
};
static const char *_cairo_pdf_supported_mime_types[] =
{
CAIRO_MIME_TYPE_JPEG,
CAIRO_MIME_TYPE_JP2,
CAIRO_MIME_TYPE_UNIQUE_ID,
CAIRO_MIME_TYPE_JBIG2,
CAIRO_MIME_TYPE_JBIG2_GLOBAL,
CAIRO_MIME_TYPE_JBIG2_GLOBAL_ID,
CAIRO_MIME_TYPE_CCITT_FAX,
CAIRO_MIME_TYPE_CCITT_FAX_PARAMS,
NULL
};
/* PDF cross-reference stream types */
typedef enum {
PDF_OBJECT_FREE = 0,
PDF_OBJECT_UNCOMPRESSED = 1,
PDF_OBJECT_COMPRESSED = 2,
} cairo_pdf_object_type_t;
typedef struct _cairo_pdf_object {
cairo_pdf_object_type_t type;
union {
long offset; /* type == PDF_OBJECT_UNCOMPRESSED */
struct compressed_obj { /* type == PDF_OBJECT_COMPRESSED */
cairo_pdf_resource_t xref_stream;
int index;
} compressed_obj;
} u;
} cairo_pdf_object_t;
typedef struct _cairo_xref_stream_object {
cairo_pdf_resource_t resource;
long offset;
} cairo_xref_stream_object_t;
typedef struct _cairo_pdf_font {
unsigned int font_id;
unsigned int subset_id;
cairo_pdf_resource_t subset_resource;
} cairo_pdf_font_t;
typedef struct _cairo_pdf_rgb_linear_function {
cairo_pdf_resource_t resource;
double color1[3];
double color2[3];
} cairo_pdf_rgb_linear_function_t;
typedef struct _cairo_pdf_alpha_linear_function {
cairo_pdf_resource_t resource;
double alpha1;
double alpha2;
} cairo_pdf_alpha_linear_function_t;
static void
_cairo_pdf_surface_clear (cairo_pdf_surface_t *surface);
static void
_cairo_pdf_smask_group_destroy (cairo_pdf_smask_group_t *group);
static cairo_int_status_t
_cairo_pdf_surface_add_font (unsigned int font_id,
unsigned int subset_id,
void *closure);
static void
_cairo_pdf_group_resources_init (cairo_pdf_group_resources_t *res);
static cairo_int_status_t
_cairo_pdf_surface_open_stream (cairo_pdf_surface_t *surface,
cairo_pdf_resource_t *resource,
cairo_bool_t compressed,
const char *fmt,
...) CAIRO_PRINTF_FORMAT(4, 5);
static cairo_int_status_t
_cairo_pdf_surface_close_stream (cairo_pdf_surface_t *surface);
static cairo_int_status_t
_cairo_pdf_surface_emit_surface (cairo_pdf_surface_t *surface,
cairo_pdf_source_surface_t *source,
cairo_bool_t test,
cairo_bool_t *is_image);
static cairo_int_status_t
_cairo_pdf_surface_write_page (cairo_pdf_surface_t *surface);
static cairo_int_status_t
_cairo_pdf_surface_write_pages (cairo_pdf_surface_t *surface);
static cairo_int_status_t
_cairo_pdf_surface_write_catalog (cairo_pdf_surface_t *surface,
cairo_pdf_resource_t catalog);
static long
_cairo_pdf_surface_write_xref (cairo_pdf_surface_t *surface);
static cairo_int_status_t
_cairo_pdf_surface_write_xref_stream (cairo_pdf_surface_t *surface,
cairo_pdf_resource_t xref_res,
cairo_pdf_resource_t root_res,
cairo_pdf_resource_t info_res,
long *xref_offset);
static cairo_int_status_t
_cairo_pdf_surface_write_patterns_and_smask_groups (cairo_pdf_surface_t *surface,
cairo_bool_t finish);
static cairo_int_status_t
_cairo_pdf_surface_emit_font_subsets (cairo_pdf_surface_t *surface);
static cairo_bool_t
_cairo_pdf_source_surface_equal (const void *key_a, const void *key_b);
static const cairo_surface_backend_t cairo_pdf_surface_backend;
static const cairo_paginated_surface_backend_t cairo_pdf_surface_paginated_backend;
cairo_pdf_resource_t
_cairo_pdf_surface_new_object (cairo_pdf_surface_t *surface)
{
cairo_pdf_resource_t resource;
cairo_int_status_t status;
cairo_pdf_object_t object;
/* Default to Uncompressed. If this object is used with
* _cairo_pdf_surface_object_begin() and Object Streams are
* enabled it will be changed to Compressed. */
object.type = PDF_OBJECT_UNCOMPRESSED;
object.u.offset = _cairo_output_stream_get_position (surface->output);
status = _cairo_array_append (&surface->objects, &object);
if (unlikely (status)) {
resource.id = 0;
return resource;
}
resource = surface->next_available_resource;
surface->next_available_resource.id++;
return resource;
}
void
_cairo_pdf_surface_update_object (cairo_pdf_surface_t *surface,
cairo_pdf_resource_t resource)
{
cairo_pdf_object_t *object;
object = _cairo_array_index (&surface->objects, resource.id - 1);
object->u.offset = _cairo_output_stream_get_position (surface->output);
}
static void
_cairo_pdf_surface_set_size_internal (cairo_pdf_surface_t *surface,
double width,
double height)
{
surface->width = width;
surface->height = height;
surface->surface_extents.x = 0;
surface->surface_extents.y = 0;
surface->surface_extents.width = ceil (surface->width);
surface->surface_extents.height = ceil (surface->height);
}
static cairo_bool_t
_path_covers_bbox (cairo_pdf_surface_t *surface,
cairo_path_fixed_t *path)
{
cairo_box_t box;
return _cairo_path_fixed_is_box (path, &box) &&
box.p1.x <= 0 &&
box.p1.y <= 0 &&
box.p2.x >= _cairo_fixed_from_double (surface->width) &&
box.p2.y >= _cairo_fixed_from_double (surface->height);
}
static cairo_status_t
_cairo_pdf_surface_clipper_intersect_clip_path (cairo_surface_clipper_t *clipper,
cairo_path_fixed_t *path,
cairo_fill_rule_t fill_rule,
double tolerance,
cairo_antialias_t antialias)
{
cairo_pdf_surface_t *surface = cairo_container_of (clipper,
cairo_pdf_surface_t,
clipper);
cairo_int_status_t status;
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (unlikely (status))
return status;
if (path == NULL) {
_cairo_output_stream_printf (surface->output, "Q q\n");
surface->current_pattern_is_solid_color = FALSE;
surface->current_operator = CAIRO_OPERATOR_OVER;
_cairo_pdf_operators_reset (&surface->pdf_operators);
return CAIRO_STATUS_SUCCESS;
}
if (_path_covers_bbox (surface, path))
return CAIRO_STATUS_SUCCESS;
return _cairo_pdf_operators_clip (&surface->pdf_operators, path, fill_rule);
}
static cairo_surface_t *
_cairo_pdf_surface_create_for_stream_internal (cairo_output_stream_t *output,
double width,
double height)
{
cairo_pdf_surface_t *surface;
cairo_status_t status, status_ignored;
surface = _cairo_malloc (sizeof (cairo_pdf_surface_t));
if (unlikely (surface == NULL)) {
/* destroy stream on behalf of caller */
status = _cairo_output_stream_destroy (output);
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
}
_cairo_surface_init (&surface->base,
&cairo_pdf_surface_backend,
NULL, /* device */
CAIRO_CONTENT_COLOR_ALPHA,
TRUE); /* is_vector */
surface->output = output;
surface->width = width;
surface->height = height;
cairo_matrix_init (&surface->cairo_to_pdf, 1, 0, 0, 1, 0, 0);
surface->in_xobject = FALSE;
surface->surface_extents.x = 0;
surface->surface_extents.y = 0;
surface->surface_extents.width = ceil (surface->width);
surface->surface_extents.height = ceil (surface->height);
surface->surface_bounded = TRUE;
_cairo_array_init (&surface->objects, sizeof (cairo_pdf_object_t));
_cairo_array_init (&surface->pages, sizeof (cairo_pdf_resource_t));
_cairo_array_init (&surface->rgb_linear_functions, sizeof (cairo_pdf_rgb_linear_function_t));
_cairo_array_init (&surface->alpha_linear_functions, sizeof (cairo_pdf_alpha_linear_function_t));
_cairo_array_init (&surface->fonts, sizeof (cairo_pdf_font_t));
_cairo_array_init (&surface->smask_groups, sizeof (cairo_pdf_smask_group_t *));
_cairo_array_init (&surface->knockout_group, sizeof (cairo_pdf_resource_t));
_cairo_array_init (&surface->page_patterns, sizeof (cairo_pdf_pattern_t));
_cairo_array_init (&surface->page_surfaces, sizeof (cairo_pdf_source_surface_t));
_cairo_array_init (&surface->doc_surfaces, sizeof (cairo_pdf_source_surface_t));
_cairo_array_init (&surface->jbig2_global, sizeof (cairo_pdf_jbig2_global_t));
_cairo_array_init (&surface->page_heights, sizeof (double));
surface->all_surfaces = _cairo_hash_table_create (_cairo_pdf_source_surface_equal);
if (unlikely (surface->all_surfaces == NULL)) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto BAIL0;
}
_cairo_pdf_group_resources_init (&surface->resources);
surface->font_subsets = _cairo_scaled_font_subsets_create_composite ();
if (! surface->font_subsets) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto BAIL1;
}
_cairo_scaled_font_subsets_enable_latin_subset (surface->font_subsets, TRUE);
surface->next_available_resource.id = 1;
surface->pages_resource = _cairo_pdf_surface_new_object (surface);
if (surface->pages_resource.id == 0) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto BAIL2;
}
surface->struct_tree_root.id = 0;
surface->pdf_version = CAIRO_PDF_VERSION_1_5;
surface->compress_streams = TRUE;
surface->pdf_stream.active = FALSE;
surface->pdf_stream.old_output = NULL;
surface->group_stream.active = FALSE;
surface->group_stream.stream = NULL;
surface->group_stream.mem_stream = NULL;
surface->object_stream.active = FALSE;
surface->object_stream.stream = NULL;
_cairo_array_init (&surface->object_stream.objects, sizeof (cairo_xref_stream_object_t));
surface->paginated_mode = CAIRO_PAGINATED_MODE_ANALYZE;
surface->force_fallbacks = FALSE;
surface->select_pattern_gstate_saved = FALSE;
surface->current_pattern_is_solid_color = FALSE;
surface->current_operator = CAIRO_OPERATOR_OVER;
surface->header_emitted = FALSE;
_cairo_surface_clipper_init (&surface->clipper,
_cairo_pdf_surface_clipper_intersect_clip_path);
_cairo_pdf_operators_init (&surface->pdf_operators,
surface->output,
&surface->cairo_to_pdf,
surface->font_subsets,
FALSE);
_cairo_pdf_operators_set_font_subsets_callback (&surface->pdf_operators,
_cairo_pdf_surface_add_font,
surface);
_cairo_pdf_operators_enable_actual_text(&surface->pdf_operators, TRUE);
status = _cairo_pdf_interchange_init (surface);
if (unlikely (status))
goto BAIL2;
surface->page_parent_tree = -1;
_cairo_array_init (&surface->page_annots, sizeof (cairo_pdf_resource_t));
_cairo_array_init (&surface->forward_links, sizeof (cairo_pdf_forward_link_t));
surface->tagged = FALSE;
surface->current_page_label = NULL;
_cairo_array_init (&surface->page_labels, sizeof (char *));
surface->outlines_dict_res.id = 0;
surface->names_dict_res.id = 0;
surface->docinfo_res.id = 0;
surface->page_labels_res.id = 0;
surface->thumbnail_width = 0;
surface->thumbnail_height = 0;
surface->thumbnail_image = NULL;
if (getenv ("CAIRO_DEBUG_PDF") != NULL)
surface->compress_streams = FALSE;
surface->paginated_surface = _cairo_paginated_surface_create (
&surface->base,
CAIRO_CONTENT_COLOR_ALPHA,
&cairo_pdf_surface_paginated_backend);
status = surface->paginated_surface->status;
if (status == CAIRO_STATUS_SUCCESS) {
/* paginated keeps the only reference to surface now, drop ours */
cairo_surface_destroy (&surface->base);
return surface->paginated_surface;
}
BAIL2:
_cairo_scaled_font_subsets_destroy (surface->font_subsets);
BAIL1:
_cairo_hash_table_destroy (surface->all_surfaces);
BAIL0:
_cairo_array_fini (&surface->objects);
free (surface);
/* destroy stream on behalf of caller */
status_ignored = _cairo_output_stream_destroy (output);
return _cairo_surface_create_in_error (status);
}
/**
* cairo_pdf_surface_create_for_stream:
* @write_func: a #cairo_write_func_t to accept the output data, may be %NULL
* to indicate a no-op @write_func. With a no-op @write_func,
* the surface may be queried or used as a source without
* generating any temporary files.
* @closure: the closure argument for @write_func
* @width_in_points: width of the surface, in points (1 point == 1/72.0 inch)
* @height_in_points: height of the surface, in points (1 point == 1/72.0 inch)
*
* Creates a PDF surface of the specified size in points to be written
* incrementally to the stream represented by @write_func and @closure.
*
* Return value: a pointer to the newly created surface. The caller
* owns the surface and should call cairo_surface_destroy() when done
* with it.
*
* This function always returns a valid pointer, but it will return a
* pointer to a "nil" surface if an error such as out of memory
* occurs. You can use cairo_surface_status() to check for this.
*
* Since: 1.2
**/
cairo_surface_t *
cairo_pdf_surface_create_for_stream (cairo_write_func_t write_func,
void *closure,
double width_in_points,
double height_in_points)
{
cairo_output_stream_t *output;
output = _cairo_output_stream_create (write_func, NULL, closure);
if (_cairo_output_stream_get_status (output))
return _cairo_surface_create_in_error (_cairo_output_stream_destroy (output));
return _cairo_pdf_surface_create_for_stream_internal (output,
width_in_points,
height_in_points);
}
/**
* cairo_pdf_surface_create:
* @filename: a filename for the PDF output (must be writable), %NULL may be
* used to specify no output. This will generate a PDF surface that
* may be queried and used as a source, without generating a
* temporary file.
* @width_in_points: width of the surface, in points (1 point == 1/72.0 inch)
* @height_in_points: height of the surface, in points (1 point == 1/72.0 inch)
*
* Creates a PDF surface of the specified size in points to be written
* to @filename.
*
* Return value: a pointer to the newly created surface. The caller
* owns the surface and should call cairo_surface_destroy() when done
* with it.
*
* This function always returns a valid pointer, but it will return a
* pointer to a "nil" surface if an error such as out of memory
* occurs. You can use cairo_surface_status() to check for this.
*
* Since: 1.2
**/
cairo_surface_t *
cairo_pdf_surface_create (const char *filename,
double width_in_points,
double height_in_points)
{
cairo_output_stream_t *output;
output = _cairo_output_stream_create_for_filename (filename);
if (_cairo_output_stream_get_status (output))
return _cairo_surface_create_in_error (_cairo_output_stream_destroy (output));
return _cairo_pdf_surface_create_for_stream_internal (output,
width_in_points,
height_in_points);
}
static cairo_bool_t
_cairo_surface_is_pdf (cairo_surface_t *surface)
{
return surface->backend == &cairo_pdf_surface_backend;
}
/* If the abstract_surface is a paginated surface, and that paginated
* surface's target is a pdf_surface, then set pdf_surface to that
* target. Otherwise return FALSE.
*/
static cairo_bool_t
_extract_pdf_surface (cairo_surface_t *surface,
cairo_pdf_surface_t **pdf_surface)
{
cairo_surface_t *target;
cairo_status_t status_ignored;
if (surface->status)
return FALSE;
if (surface->finished) {
status_ignored = _cairo_surface_set_error (surface,
_cairo_error (CAIRO_STATUS_SURFACE_FINISHED));
return FALSE;
}
if (! _cairo_surface_is_paginated (surface)) {
status_ignored = _cairo_surface_set_error (surface,
_cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH));
return FALSE;
}
target = _cairo_paginated_surface_get_target (surface);
if (target->status) {
status_ignored = _cairo_surface_set_error (surface,
target->status);
return FALSE;
}
if (target->finished) {
status_ignored = _cairo_surface_set_error (surface,
_cairo_error (CAIRO_STATUS_SURFACE_FINISHED));
return FALSE;
}
if (! _cairo_surface_is_pdf (target)) {
status_ignored = _cairo_surface_set_error (surface,
_cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH));
return FALSE;
}
*pdf_surface = (cairo_pdf_surface_t *) target;
return TRUE;
}
/**
* cairo_pdf_surface_restrict_to_version:
* @surface: a PDF #cairo_surface_t
* @version: PDF version
*
* Restricts the generated PDF file to @version. See cairo_pdf_get_versions()
* for a list of available version values that can be used here.
*
* This function should only be called before any drawing operations
* have been performed on the given surface. The simplest way to do
* this is to call this function immediately after creating the
* surface.
*
* Since: 1.10
**/
void
cairo_pdf_surface_restrict_to_version (cairo_surface_t *abstract_surface,
cairo_pdf_version_t version)
{
cairo_pdf_surface_t *surface = NULL; /* hide compiler warning */
if (! _extract_pdf_surface (abstract_surface, &surface))
return;
if (version < CAIRO_PDF_VERSION_LAST)
surface->pdf_version = version;
_cairo_pdf_operators_enable_actual_text(&surface->pdf_operators,
version >= CAIRO_PDF_VERSION_1_5);
}
/**
* cairo_pdf_get_versions:
* @versions: supported version list
* @num_versions: list length
*
* Used to retrieve the list of supported versions. See
* cairo_pdf_surface_restrict_to_version().
*
* Since: 1.10
**/
void
cairo_pdf_get_versions (cairo_pdf_version_t const **versions,
int *num_versions)
{
if (versions != NULL)
*versions = _cairo_pdf_versions;
if (num_versions != NULL)
*num_versions = CAIRO_PDF_VERSION_LAST;
}
/**
* cairo_pdf_version_to_string:
* @version: a version id
*
* Get the string representation of the given @version id. This function
* will return %NULL if @version isn't valid. See cairo_pdf_get_versions()
* for a way to get the list of valid version ids.
*
* Return value: the string associated to given version.
*
* Since: 1.10
**/
const char *
cairo_pdf_version_to_string (cairo_pdf_version_t version)
{
if (version >= CAIRO_PDF_VERSION_LAST)
return NULL;
return _cairo_pdf_version_strings[version];
}
/**
* cairo_pdf_surface_set_size:
* @surface: a PDF #cairo_surface_t
* @width_in_points: new surface width, in points (1 point == 1/72.0 inch)
* @height_in_points: new surface height, in points (1 point == 1/72.0 inch)
*
* Changes the size of a PDF surface for the current (and
* subsequent) pages.
*
* This function should only be called before any drawing operations
* have been performed on the current page. The simplest way to do
* this is to call this function immediately after creating the
* surface or immediately after completing a page with either
* cairo_show_page() or cairo_copy_page().
*
* Since: 1.2
**/
void
cairo_pdf_surface_set_size (cairo_surface_t *surface,
double width_in_points,
double height_in_points)
{
cairo_pdf_surface_t *pdf_surface = NULL; /* hide compiler warning */
cairo_status_t status;
if (! _extract_pdf_surface (surface, &pdf_surface))
return;
_cairo_pdf_surface_set_size_internal (pdf_surface,
width_in_points,
height_in_points);
status = _cairo_paginated_surface_set_size (pdf_surface->paginated_surface,
width_in_points,
height_in_points);
if (status)
status = _cairo_surface_set_error (surface, status);
}
/**
* CAIRO_PDF_OUTLINE_ROOT:
*
* The root outline item in cairo_pdf_surface_add_outline().
*
* Since: 1.16
**/
/**
* cairo_pdf_surface_add_outline:
* @surface: a PDF #cairo_surface_t
* @parent_id: the id of the parent item or %CAIRO_PDF_OUTLINE_ROOT if this is a top level item.
* @utf8: the name of the outline
* @link_attribs: the link attributes specifying where this outline links to
* @flags: outline item flags
*
* Add an item to the document outline hierarchy with the name @utf8
* that links to the location specified by @link_attribs. Link
* attributes have the same keys and values as the [Link Tag][link],
* excluding the "rect" attribute. The item will be a child of the
* item with id @parent_id. Use %CAIRO_PDF_OUTLINE_ROOT as the parent
* id of top level items.
*
* Return value: the id for the added item.
*
* Since: 1.16
**/
int
cairo_pdf_surface_add_outline (cairo_surface_t *surface,
int parent_id,
const char *utf8,
const char *link_attribs,
cairo_pdf_outline_flags_t flags)
{
cairo_pdf_surface_t *pdf_surface = NULL; /* hide compiler warning */
cairo_status_t status;
int id = 0;
if (! _extract_pdf_surface (surface, &pdf_surface))
return 0;
status = _cairo_pdf_interchange_add_outline (pdf_surface,
parent_id,
utf8,
link_attribs,
flags,
&id);
if (status)
status = _cairo_surface_set_error (surface, status);
return id;
}
/**
* cairo_pdf_surface_set_metadata:
* @surface: a PDF #cairo_surface_t
* @metadata: The metadata item to set.
* @utf8: metadata value
*
* Set document metadata. The %CAIRO_PDF_METADATA_CREATE_DATE and
* %CAIRO_PDF_METADATA_MOD_DATE values must be in ISO-8601 format:
* YYYY-MM-DDThh:mm:ss. An optional timezone of the form "[+/-]hh:mm"
* or "Z" for UTC time can be appended. All other metadata values can be any UTF-8
* string.
*
* For example:
* <informalexample><programlisting>
* cairo_pdf_surface_set_metadata (surface, CAIRO_PDF_METADATA_TITLE, "My Document");
* cairo_pdf_surface_set_metadata (surface, CAIRO_PDF_METADATA_CREATE_DATE, "2015-12-31T23:59+02:00");
* </programlisting></informalexample>
*
* Since: 1.16
**/
void
cairo_pdf_surface_set_metadata (cairo_surface_t *surface,
cairo_pdf_metadata_t metadata,
const char *utf8)
{
cairo_pdf_surface_t *pdf_surface = NULL; /* hide compiler warning */
cairo_status_t status;
if (! _extract_pdf_surface (surface, &pdf_surface))
return;
status = _cairo_pdf_interchange_set_metadata (pdf_surface, metadata, utf8);
if (status)
status = _cairo_surface_set_error (surface, status);
}
/**
* cairo_pdf_surface_set_page_label:
* @surface: a PDF #cairo_surface_t
* @utf8: The page label.
*
* Set page label for the current page.
*
* Since: 1.16
**/
void
cairo_pdf_surface_set_page_label (cairo_surface_t *surface,
const char *utf8)
{
cairo_pdf_surface_t *pdf_surface = NULL; /* hide compiler warning */
if (! _extract_pdf_surface (surface, &pdf_surface))
return;
free (pdf_surface->current_page_label);
pdf_surface->current_page_label = utf8 ? strdup (utf8) : NULL;
}
/**
* cairo_pdf_surface_set_thumbnail_size:
* @surface: a PDF #cairo_surface_t
* @width: Thumbnail width.
* @height: Thumbnail height
*
* Set the thumbnail image size for the current and all subsequent
* pages. Setting a width or height of 0 disables thumbnails for the
* current and subsequent pages.
*
* Since: 1.16
**/
void
cairo_pdf_surface_set_thumbnail_size (cairo_surface_t *surface,
int width,
int height)
{
cairo_pdf_surface_t *pdf_surface = NULL; /* hide compiler warning */
if (! _extract_pdf_surface (surface, &pdf_surface))
return;
pdf_surface->thumbnail_width = width;
pdf_surface->thumbnail_height = height;
}
static void
_cairo_pdf_surface_clear (cairo_pdf_surface_t *surface)
{
int i, size;
cairo_pdf_pattern_t *pattern;
cairo_pdf_source_surface_t *src_surface;
cairo_pdf_smask_group_t *group;
size = _cairo_array_num_elements (&surface->page_patterns);
for (i = 0; i < size; i++) {
pattern = (cairo_pdf_pattern_t *) _cairo_array_index (&surface->page_patterns, i);
cairo_pattern_destroy (pattern->pattern);
}
_cairo_array_truncate (&surface->page_patterns, 0);
size = _cairo_array_num_elements (&surface->page_surfaces);
for (i = 0; i < size; i++) {
src_surface = (cairo_pdf_source_surface_t *) _cairo_array_index (&surface->page_surfaces, i);
cairo_surface_destroy (src_surface->surface);
}
_cairo_array_truncate (&surface->page_surfaces, 0);
size = _cairo_array_num_elements (&surface->smask_groups);
for (i = 0; i < size; i++) {
_cairo_array_copy_element (&surface->smask_groups, i, &group);
_cairo_pdf_smask_group_destroy (group);
}
_cairo_array_truncate (&surface->smask_groups, 0);
_cairo_array_truncate (&surface->knockout_group, 0);
_cairo_array_truncate (&surface->page_annots, 0);
if (surface->thumbnail_image)
cairo_surface_destroy (&surface->thumbnail_image->base);
surface->thumbnail_image = NULL;
}
static void
_cairo_pdf_group_resources_init (cairo_pdf_group_resources_t *res)
{
int i;
for (i = 0; i < CAIRO_NUM_OPERATORS; i++)
res->operators[i] = FALSE;
_cairo_array_init (&res->alphas, sizeof (double));
_cairo_array_init (&res->smasks, sizeof (cairo_pdf_resource_t));
_cairo_array_init (&res->patterns, sizeof (cairo_pdf_resource_t));
_cairo_array_init (&res->shadings, sizeof (cairo_pdf_resource_t));
_cairo_array_init (&res->xobjects, sizeof (cairo_pdf_resource_t));
_cairo_array_init (&res->fonts, sizeof (cairo_pdf_font_t));
}
static void
_cairo_pdf_group_resources_fini (cairo_pdf_group_resources_t *res)
{
_cairo_array_fini (&res->alphas);
_cairo_array_fini (&res->smasks);
_cairo_array_fini (&res->patterns);
_cairo_array_fini (&res->shadings);
_cairo_array_fini (&res->xobjects);
_cairo_array_fini (&res->fonts);
}
static void
_cairo_pdf_group_resources_clear (cairo_pdf_group_resources_t *res)
{
int i;
for (i = 0; i < CAIRO_NUM_OPERATORS; i++)
res->operators[i] = FALSE;
_cairo_array_truncate (&res->alphas, 0);
_cairo_array_truncate (&res->smasks, 0);
_cairo_array_truncate (&res->patterns, 0);
_cairo_array_truncate (&res->shadings, 0);
_cairo_array_truncate (&res->xobjects, 0);
_cairo_array_truncate (&res->fonts, 0);
}
static void
_cairo_pdf_surface_add_operator (cairo_pdf_surface_t *surface,
cairo_operator_t op)
{
cairo_pdf_group_resources_t *res = &surface->resources;
res->operators[op] = TRUE;
}
static cairo_int_status_t
_cairo_pdf_surface_add_alpha (cairo_pdf_surface_t *surface,
double alpha,
int *index)
{
int num_alphas, i;
double other;
cairo_int_status_t status;
cairo_pdf_group_resources_t *res = &surface->resources;
num_alphas = _cairo_array_num_elements (&res->alphas);
for (i = 0; i < num_alphas; i++) {
_cairo_array_copy_element (&res->alphas, i, &other);
if (alpha == other) {
*index = i;
return CAIRO_STATUS_SUCCESS;
}
}
status = _cairo_array_append (&res->alphas, &alpha);
if (unlikely (status))
return status;
*index = _cairo_array_num_elements (&res->alphas) - 1;
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_pdf_surface_add_smask (cairo_pdf_surface_t *surface,
cairo_pdf_resource_t smask)
{
return _cairo_array_append (&(surface->resources.smasks), &smask);
}
static cairo_int_status_t
_cairo_pdf_surface_add_pattern (cairo_pdf_surface_t *surface,
cairo_pdf_resource_t pattern)
{
return _cairo_array_append (&(surface->resources.patterns), &pattern);
}
static cairo_int_status_t
_cairo_pdf_surface_add_shading (cairo_pdf_surface_t *surface,
cairo_pdf_resource_t shading)
{
return _cairo_array_append (&(surface->resources.shadings), &shading);
}
static cairo_int_status_t
_cairo_pdf_surface_add_xobject (cairo_pdf_surface_t *surface,
cairo_pdf_resource_t xobject)
{
return _cairo_array_append (&(surface->resources.xobjects), &xobject);
}
static cairo_int_status_t
_cairo_pdf_surface_add_font (unsigned int font_id,
unsigned int subset_id,
void *closure)
{
cairo_pdf_surface_t *surface = closure;
cairo_pdf_font_t font;
int num_fonts, i;
cairo_int_status_t status;
cairo_pdf_group_resources_t *res = &surface->resources;
num_fonts = _cairo_array_num_elements (&res->fonts);
for (i = 0; i < num_fonts; i++) {
_cairo_array_copy_element (&res->fonts, i, &font);
if (font.font_id == font_id &&
font.subset_id == subset_id)
return CAIRO_STATUS_SUCCESS;
}
num_fonts = _cairo_array_num_elements (&surface->fonts);
for (i = 0; i < num_fonts; i++) {
_cairo_array_copy_element (&surface->fonts, i, &font);
if (font.font_id == font_id &&
font.subset_id == subset_id)
return _cairo_array_append (&res->fonts, &font);
}
font.font_id = font_id;
font.subset_id = subset_id;
font.subset_resource = _cairo_pdf_surface_new_object (surface);
if (font.subset_resource.id == 0)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
status = _cairo_array_append (&surface->fonts, &font);
if (unlikely (status))
return status;
return _cairo_array_append (&res->fonts, &font);
}
static cairo_pdf_resource_t
_cairo_pdf_surface_get_font_resource (cairo_pdf_surface_t *surface,
unsigned int font_id,
unsigned int subset_id)
{
cairo_pdf_font_t font;
int num_fonts, i;
num_fonts = _cairo_array_num_elements (&surface->fonts);
for (i = 0; i < num_fonts; i++) {
_cairo_array_copy_element (&surface->fonts, i, &font);
if (font.font_id == font_id && font.subset_id == subset_id)
return font.subset_resource;
}
font.subset_resource.id = 0;
return font.subset_resource;
}
static const char *
_cairo_operator_to_pdf_blend_mode (cairo_operator_t op)
{
switch (op) {
/* The extend blend mode operators */
case CAIRO_OPERATOR_MULTIPLY: return "Multiply";
case CAIRO_OPERATOR_SCREEN: return "Screen";
case CAIRO_OPERATOR_OVERLAY: return "Overlay";
case CAIRO_OPERATOR_DARKEN: return "Darken";
case CAIRO_OPERATOR_LIGHTEN: return "Lighten";
case CAIRO_OPERATOR_COLOR_DODGE: return "ColorDodge";
case CAIRO_OPERATOR_COLOR_BURN: return "ColorBurn";
case CAIRO_OPERATOR_HARD_LIGHT: return "HardLight";
case CAIRO_OPERATOR_SOFT_LIGHT: return "SoftLight";
case CAIRO_OPERATOR_DIFFERENCE: return "Difference";
case CAIRO_OPERATOR_EXCLUSION: return "Exclusion";
case CAIRO_OPERATOR_HSL_HUE: return "Hue";
case CAIRO_OPERATOR_HSL_SATURATION: return "Saturation";
case CAIRO_OPERATOR_HSL_COLOR: return "Color";
case CAIRO_OPERATOR_HSL_LUMINOSITY: return "Luminosity";
default:
/* The original Porter-Duff set */
case CAIRO_OPERATOR_CLEAR:
case CAIRO_OPERATOR_SOURCE:
case CAIRO_OPERATOR_OVER:
case CAIRO_OPERATOR_IN:
case CAIRO_OPERATOR_OUT:
case CAIRO_OPERATOR_ATOP:
case CAIRO_OPERATOR_DEST:
case CAIRO_OPERATOR_DEST_OVER:
case CAIRO_OPERATOR_DEST_IN:
case CAIRO_OPERATOR_DEST_OUT:
case CAIRO_OPERATOR_DEST_ATOP:
case CAIRO_OPERATOR_XOR:
case CAIRO_OPERATOR_ADD:
case CAIRO_OPERATOR_SATURATE:
return "Normal";
}
}
static void
_cairo_pdf_surface_emit_group_resources (cairo_pdf_surface_t *surface,
cairo_pdf_group_resources_t *res,
cairo_bool_t gs0)
{
int num_alphas, num_smasks, num_resources, i;
double alpha;
cairo_pdf_resource_t *smask, *pattern, *shading, *xobject;
cairo_pdf_font_t *font;
_cairo_output_stream_printf (surface->output, "<<\n");
num_alphas = _cairo_array_num_elements (&res->alphas);
num_smasks = _cairo_array_num_elements (&res->smasks);
if (num_alphas > 0 || num_smasks > 0) {
_cairo_output_stream_printf (surface->output,
" /ExtGState <<\n");
if (gs0) {
_cairo_output_stream_printf (surface->output,
" /gs0 << /BM /Normal /SMask /None /CA 1.0 /ca 1.0 >>\n");
}
for (i = 0; i < CAIRO_NUM_OPERATORS; i++) {
if (res->operators[i]) {
_cairo_output_stream_printf (surface->output,
" /b%d << /BM /%s >>\n",
i, _cairo_operator_to_pdf_blend_mode(i));
}
}
for (i = 0; i < num_alphas; i++) {
_cairo_array_copy_element (&res->alphas, i, &alpha);
_cairo_output_stream_printf (surface->output,
" /a%d << /CA %f /ca %f >>\n",
i, alpha, alpha);
}
for (i = 0; i < num_smasks; i++) {
smask = _cairo_array_index (&res->smasks, i);
_cairo_output_stream_printf (surface->output,
" /s%d %d 0 R\n",
smask->id, smask->id);
}
_cairo_output_stream_printf (surface->output,
" >>\n");
}
num_resources = _cairo_array_num_elements (&res->patterns);
if (num_resources > 0) {
_cairo_output_stream_printf (surface->output,
" /Pattern <<");
for (i = 0; i < num_resources; i++) {
pattern = _cairo_array_index (&res->patterns, i);
_cairo_output_stream_printf (surface->output,
" /p%d %d 0 R",
pattern->id, pattern->id);
}
_cairo_output_stream_printf (surface->output,
" >>\n");
}
num_resources = _cairo_array_num_elements (&res->shadings);
if (num_resources > 0) {
_cairo_output_stream_printf (surface->output,
" /Shading <<");
for (i = 0; i < num_resources; i++) {
shading = _cairo_array_index (&res->shadings, i);
_cairo_output_stream_printf (surface->output,
" /sh%d %d 0 R",
shading->id, shading->id);
}
_cairo_output_stream_printf (surface->output,
" >>\n");
}
num_resources = _cairo_array_num_elements (&res->xobjects);
if (num_resources > 0) {
_cairo_output_stream_printf (surface->output,
" /XObject <<");
for (i = 0; i < num_resources; i++) {
xobject = _cairo_array_index (&res->xobjects, i);
_cairo_output_stream_printf (surface->output,
" /x%d %d 0 R",
xobject->id, xobject->id);
}
_cairo_output_stream_printf (surface->output,
" >>\n");
}
num_resources = _cairo_array_num_elements (&res->fonts);
if (num_resources > 0) {
_cairo_output_stream_printf (surface->output," /Font <<\n");
for (i = 0; i < num_resources; i++) {
font = _cairo_array_index (&res->fonts, i);
_cairo_output_stream_printf (surface->output,
" /f-%d-%d %d 0 R\n",
font->font_id,
font->subset_id,
font->subset_resource.id);
}
_cairo_output_stream_printf (surface->output, " >>\n");
}
_cairo_output_stream_printf (surface->output,
">>\n");
}
static cairo_pdf_smask_group_t *
_cairo_pdf_surface_create_smask_group (cairo_pdf_surface_t *surface,
const cairo_rectangle_int_t *extents)
{
cairo_pdf_smask_group_t *group;
group = calloc (1, sizeof (cairo_pdf_smask_group_t));
if (unlikely (group == NULL)) {
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
return NULL;
}
group->group_res = _cairo_pdf_surface_new_object (surface);
if (group->group_res.id == 0) {
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
free (group);
return NULL;
}
group->width = surface->width;
group->height = surface->height;
if (extents != NULL) {
group->extents = *extents;
} else {
group->extents.x = 0;
group->extents.y = 0;
group->extents.width = surface->width;
group->extents.height = surface->height;
}
return group;
}
static void
_cairo_pdf_smask_group_destroy (cairo_pdf_smask_group_t *group)
{
if (group->operation == PDF_FILL || group->operation == PDF_STROKE)
_cairo_path_fixed_fini (&group->path);
if (group->source)
cairo_pattern_destroy (group->source);
if (group->mask)
cairo_pattern_destroy (group->mask);
free (group->utf8);
free (group->glyphs);
free (group->clusters);
if (group->scaled_font)
cairo_scaled_font_destroy (group->scaled_font);
free (group);
}
static cairo_int_status_t
_cairo_pdf_surface_add_smask_group (cairo_pdf_surface_t *surface,
cairo_pdf_smask_group_t *group)
{
return _cairo_array_append (&surface->smask_groups, &group);
}
static cairo_bool_t
_cairo_pdf_source_surface_equal (const void *key_a, const void *key_b)
{
const cairo_pdf_source_surface_entry_t *a = key_a;
const cairo_pdf_source_surface_entry_t *b = key_b;
if (a->interpolate != b->interpolate)
return FALSE;
if (a->unique_id && b->unique_id && a->unique_id_length == b->unique_id_length)
return (memcmp (a->unique_id, b->unique_id, a->unique_id_length) == 0);
return (a->id == b->id);
}
static void
_cairo_pdf_source_surface_init_key (cairo_pdf_source_surface_entry_t *key)
{
if (key->unique_id && key->unique_id_length > 0) {
key->base.hash = _cairo_hash_bytes (_CAIRO_HASH_INIT_VALUE,
key->unique_id, key->unique_id_length);
} else {
key->base.hash = key->id;
}
}
static cairo_int_status_t
_cairo_pdf_surface_acquire_source_image_from_pattern (cairo_pdf_surface_t *surface,
const cairo_pattern_t *pattern,
cairo_image_surface_t **image,
void **image_extra)
{
switch (pattern->type) {
case CAIRO_PATTERN_TYPE_SURFACE: {
cairo_surface_pattern_t *surf_pat = (cairo_surface_pattern_t *) pattern;
return _cairo_surface_acquire_source_image (surf_pat->surface, image, image_extra);
} break;
case CAIRO_PATTERN_TYPE_RASTER_SOURCE: {
cairo_surface_t *surf;
surf = _cairo_raster_source_pattern_acquire (pattern, &surface->base, NULL);
if (!surf)
return CAIRO_INT_STATUS_UNSUPPORTED;
assert (_cairo_surface_is_image (surf));
*image = (cairo_image_surface_t *) surf;
} break;
case CAIRO_PATTERN_TYPE_SOLID:
case CAIRO_PATTERN_TYPE_LINEAR:
case CAIRO_PATTERN_TYPE_RADIAL:
case CAIRO_PATTERN_TYPE_MESH:
default:
ASSERT_NOT_REACHED;
break;
}
return CAIRO_STATUS_SUCCESS;
}
static void
_cairo_pdf_surface_release_source_image_from_pattern (cairo_pdf_surface_t *surface,
const cairo_pattern_t *pattern,
cairo_image_surface_t *image,
void *image_extra)
{
switch (pattern->type) {
case CAIRO_PATTERN_TYPE_SURFACE: {
cairo_surface_pattern_t *surf_pat = (cairo_surface_pattern_t *) pattern;
_cairo_surface_release_source_image (surf_pat->surface, image, image_extra);
} break;
case CAIRO_PATTERN_TYPE_RASTER_SOURCE:
_cairo_raster_source_pattern_release (pattern, &image->base);
break;
case CAIRO_PATTERN_TYPE_SOLID:
case CAIRO_PATTERN_TYPE_LINEAR:
case CAIRO_PATTERN_TYPE_RADIAL:
case CAIRO_PATTERN_TYPE_MESH:
default:
ASSERT_NOT_REACHED;
break;
}
}
static cairo_int_status_t
_get_source_surface_extents (cairo_surface_t *source,
cairo_rectangle_int_t *extents,
cairo_bool_t *bounded,
cairo_bool_t *subsurface)
{
cairo_int_status_t status;
*bounded = TRUE;
*subsurface = FALSE;
if (source->type == CAIRO_SURFACE_TYPE_RECORDING) {
cairo_surface_t *free_me = NULL;
if (_cairo_surface_is_snapshot (source))
free_me = source = _cairo_surface_snapshot_get_target (source);
if (source->backend->type == CAIRO_SURFACE_TYPE_SUBSURFACE) {
cairo_surface_subsurface_t *sub = (cairo_surface_subsurface_t *) source;
*extents = sub->extents;
*subsurface = TRUE;
} else {
cairo_box_t box;
*bounded = _cairo_surface_get_extents (source, extents);
if (! *bounded) {
status = _cairo_recording_surface_get_ink_bbox ((cairo_recording_surface_t *)source,
&box, NULL);
if (unlikely (status)) {
cairo_surface_destroy (free_me);
return status;
}
_cairo_box_round_to_rectangle (&box, extents);
}
}
cairo_surface_destroy (free_me);
} else {
*bounded = _cairo_surface_get_extents (source, extents);
}
return CAIRO_STATUS_SUCCESS;
}
/**
* _cairo_pdf_surface_add_source_surface:
* @surface: [in] the pdf surface
* @source_surface: [in] A #cairo_surface_t to use as the source surface
* @source_pattern: [in] A #cairo_pattern_t of type SURFACE or RASTER_SOURCE to use as the source
* @op: [in] the operator used to composite this source
* @filter: [in] filter type of the source pattern
* @stencil_mask: [in] if true, the surface will be written to the PDF as an /ImageMask
* @smask: [in] if true, only the alpha channel will be written (images only)
* @need_transp_group: [in] if true and an XObject is used, make it a Transparency group
* @extents: [in] extents of the operation that is using this source
* @smask_res: [in] if not NULL, the image written will specify this resource as the smask for
* the image (images only)
* @pdf_source: [out] return pdf_source_surface entry in hash table
* @x_offset: [out] if not NULL return x offset of surface
* @y_offset: [out] if not NULL return y offset of surface
* @source_extents: [out] if not NULL return operation extents in source space
*
* Add surface or raster_source pattern to list of surfaces to be
* written to the PDF file when the current page is finished. Returns
* a PDF resource to reference the surface. A hash table of all
* surfaces in the PDF file (keyed by CAIRO_MIME_TYPE_UNIQUE_ID or
* surface unique_id) is used to ensure surfaces with the same id are
* only written once to the PDF file.
*
* Only one of @source_pattern or @source_surface is to be
* specified. Set the other to NULL.
**/
static cairo_int_status_t
_cairo_pdf_surface_add_source_surface (cairo_pdf_surface_t *surface,
cairo_surface_t *source_surface,
const cairo_pattern_t *source_pattern,
cairo_operator_t op,
cairo_filter_t filter,
cairo_bool_t stencil_mask,
cairo_bool_t smask,
cairo_bool_t need_transp_group,
const cairo_rectangle_int_t *extents,
cairo_pdf_resource_t *smask_res,
cairo_pdf_source_surface_entry_t **pdf_source,
double *x_offset,
double *y_offset,
cairo_rectangle_int_t *source_extents)
{
cairo_pdf_source_surface_t src_surface;
cairo_pdf_source_surface_entry_t surface_key;
cairo_pdf_source_surface_entry_t *surface_entry;
cairo_int_status_t status = CAIRO_STATUS_SUCCESS;
cairo_bool_t interpolate;
unsigned char *unique_id = NULL;
unsigned long unique_id_length = 0;
cairo_image_surface_t *image;
void *image_extra;
cairo_box_t box;
cairo_rectangle_int_t op_extents;
double x, y;
cairo_bool_t subsurface;
switch (filter) {
default:
case CAIRO_FILTER_GOOD:
case CAIRO_FILTER_BEST:
case CAIRO_FILTER_BILINEAR:
interpolate = TRUE;
break;
case CAIRO_FILTER_FAST:
case CAIRO_FILTER_NEAREST:
case CAIRO_FILTER_GAUSSIAN:
interpolate = FALSE;
break;
}
x = 0;
y = 0;
if (source_pattern) {
if (source_pattern->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE) {
status = _cairo_pdf_surface_acquire_source_image_from_pattern (surface, source_pattern,
&image, &image_extra);
if (unlikely (status))
return status;
source_surface = &image->base;
cairo_surface_get_device_offset (source_surface, &x, &y);
} else {
cairo_surface_pattern_t *surface_pattern = (cairo_surface_pattern_t *) source_pattern;
source_surface = surface_pattern->surface;
}
}
if (x_offset)
*x_offset = x;
if (y_offset)
*y_offset = y;
/* transform operation extents to pattern space */
op_extents = *extents;
if (source_pattern)
{
_cairo_box_from_rectangle (&box, extents);
_cairo_matrix_transform_bounding_box_fixed (&source_pattern->matrix, &box, NULL);
_cairo_box_round_to_rectangle (&box, &op_extents);
}
if (source_extents)
*source_extents = op_extents;
surface_key.id = source_surface->unique_id;
surface_key.interpolate = interpolate;
cairo_surface_get_mime_data (source_surface, CAIRO_MIME_TYPE_UNIQUE_ID,
(const unsigned char **) &surface_key.unique_id,
&surface_key.unique_id_length);
_cairo_pdf_source_surface_init_key (&surface_key);
surface_entry = _cairo_hash_table_lookup (surface->all_surfaces, &surface_key.base);
if (surface_entry) {
if (pdf_source)
*pdf_source = surface_entry;
if (source_pattern && source_pattern->extend != CAIRO_EXTEND_NONE)
_cairo_unbounded_rectangle_init (&op_extents);
_cairo_rectangle_intersect (&op_extents, &surface_entry->extents);
_cairo_rectangle_union (&surface_entry->required_extents, &op_extents);
status = CAIRO_STATUS_SUCCESS;
}
if (status || surface_entry) {
if (source_pattern && source_pattern->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE)
_cairo_pdf_surface_release_source_image_from_pattern (surface, source_pattern, image, image_extra);
return status;
}
if (surface_key.unique_id && surface_key.unique_id_length > 0) {
unique_id = _cairo_malloc (surface_key.unique_id_length);
if (unique_id == NULL) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto fail1;
}
unique_id_length = surface_key.unique_id_length;
memcpy (unique_id, surface_key.unique_id, unique_id_length);
} else {
unique_id = NULL;
unique_id_length = 0;
}
surface_entry = _cairo_malloc (sizeof (cairo_pdf_source_surface_entry_t));
if (surface_entry == NULL) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto fail1;
}
if (pdf_source)
*pdf_source = surface_entry;
surface_entry->id = surface_key.id;
surface_entry->operator = op;
surface_entry->interpolate = interpolate;
surface_entry->stencil_mask = stencil_mask;
surface_entry->smask = smask;
surface_entry->need_transp_group = need_transp_group;
surface_entry->unique_id_length = unique_id_length;
surface_entry->unique_id = unique_id;
if (smask_res)
surface_entry->smask_res = *smask_res;
else
surface_entry->smask_res.id = 0;
status = _get_source_surface_extents (source_surface,
&surface_entry->extents,
&surface_entry->bounded,
&subsurface);
if (unlikely (status))
goto fail2;
if (subsurface) {
*x_offset = -surface_entry->extents.x;
*y_offset = -surface_entry->extents.y;
}
if (source_pattern && source_pattern->extend != CAIRO_EXTEND_NONE)
_cairo_unbounded_rectangle_init (&op_extents);
_cairo_rectangle_intersect (&op_extents, &surface_entry->extents);
surface_entry->required_extents = op_extents;
_cairo_pdf_source_surface_init_key (surface_entry);
src_surface.hash_entry = surface_entry;
if (source_pattern && source_pattern->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE) {
src_surface.type = CAIRO_PATTERN_TYPE_RASTER_SOURCE;
src_surface.surface = NULL;
status = _cairo_pattern_create_copy (&src_surface.raster_pattern, source_pattern);
if (unlikely (status))
goto fail2;
} else {
src_surface.type = CAIRO_PATTERN_TYPE_SURFACE;
src_surface.surface = cairo_surface_reference (source_surface);
src_surface.raster_pattern = NULL;
}
surface_entry->surface_res = _cairo_pdf_surface_new_object (surface);
if (surface_entry->surface_res.id == 0) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto fail3;
}
/* Test if surface will be emitted as image or recording */
status = _cairo_pdf_surface_emit_surface (surface, &src_surface, TRUE, &surface_entry->emit_image);
if (unlikely (status))
goto fail3;
if (surface_entry->bounded) {
status = _cairo_array_append (&surface->page_surfaces, &src_surface);
if (unlikely (status))
goto fail3;
} else {
status = _cairo_array_append (&surface->doc_surfaces, &src_surface);
if (unlikely (status))
goto fail3;
}
status = _cairo_hash_table_insert (surface->all_surfaces,
&surface_entry->base);
if (unlikely(status))
goto fail3;
if (source_pattern && source_pattern->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE)
_cairo_pdf_surface_release_source_image_from_pattern (surface, source_pattern, image, image_extra);
return CAIRO_STATUS_SUCCESS;
fail3:
if (source_pattern && source_pattern->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE)
cairo_pattern_destroy (src_surface.raster_pattern);
else
cairo_surface_destroy (src_surface.surface);
fail2:
free (surface_entry);
fail1:
if (unique_id)
free (unique_id);
if (source_pattern && source_pattern->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE)
_cairo_pdf_surface_release_source_image_from_pattern (surface, source_pattern, image, image_extra);
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_add_pdf_pattern_or_shading (cairo_pdf_surface_t *surface,
const cairo_pattern_t *pattern,
cairo_operator_t op,
const cairo_rectangle_int_t *extents,
cairo_bool_t is_shading,
cairo_pdf_resource_t *pattern_res,
cairo_pdf_resource_t *gstate_res)
{
cairo_pdf_pattern_t pdf_pattern;
cairo_int_status_t status;
pdf_pattern.is_shading = is_shading;
pdf_pattern.operator = op;
/* Solid colors are emitted into the content stream */
if (pattern->type == CAIRO_PATTERN_TYPE_SOLID) {
pattern_res->id = 0;
gstate_res->id = 0;
return CAIRO_INT_STATUS_SUCCESS;
}
status = _cairo_pattern_create_copy (&pdf_pattern.pattern, pattern);
if (unlikely (status))
return status;
pdf_pattern.pattern_res = _cairo_pdf_surface_new_object (surface);
if (pdf_pattern.pattern_res.id == 0) {
cairo_pattern_destroy (pdf_pattern.pattern);
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
pdf_pattern.gstate_res.id = 0;
/* gradient patterns require an smask object to implement transparency */
if (pattern->type == CAIRO_PATTERN_TYPE_LINEAR ||
pattern->type == CAIRO_PATTERN_TYPE_RADIAL ||
pattern->type == CAIRO_PATTERN_TYPE_MESH)
{
double min_alpha;
_cairo_pattern_alpha_range (pattern, &min_alpha, NULL);
if (! CAIRO_ALPHA_IS_OPAQUE (min_alpha)) {
pdf_pattern.gstate_res = _cairo_pdf_surface_new_object (surface);
if (pdf_pattern.gstate_res.id == 0) {
cairo_pattern_destroy (pdf_pattern.pattern);
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
}
}
pdf_pattern.width = surface->width;
pdf_pattern.height = surface->height;
if (extents != NULL) {
pdf_pattern.extents = *extents;
} else {
pdf_pattern.extents.x = 0;
pdf_pattern.extents.y = 0;
pdf_pattern.extents.width = surface->width;
pdf_pattern.extents.height = surface->height;
}
*pattern_res = pdf_pattern.pattern_res;
*gstate_res = pdf_pattern.gstate_res;
/* If the pattern requires a gstate it will be drawn from within
* an XObject. The initial space of each XObject has an inverted
* Y-axis. */
pdf_pattern.inverted_y_axis = pdf_pattern.gstate_res.id ? TRUE : surface->in_xobject;
status = _cairo_array_append (&surface->page_patterns, &pdf_pattern);
if (unlikely (status)) {
cairo_pattern_destroy (pdf_pattern.pattern);
return status;
}
return CAIRO_INT_STATUS_SUCCESS;
}
/* Get BBox from extents */
static void
_get_bbox_from_extents (const cairo_rectangle_int_t *extents,
cairo_box_double_t *bbox)
{
bbox->p1.x = extents->x;
bbox->p1.y = extents->y;
bbox->p2.x = extents->x + extents->width;
bbox->p2.y = extents->y + extents->height;
}
static cairo_int_status_t
_cairo_pdf_surface_add_pdf_shading (cairo_pdf_surface_t *surface,
const cairo_pattern_t *pattern,
cairo_operator_t op,
const cairo_rectangle_int_t *extents,
cairo_pdf_resource_t *shading_res,
cairo_pdf_resource_t *gstate_res)
{
return _cairo_pdf_surface_add_pdf_pattern_or_shading (surface,
pattern,
op,
extents,
TRUE,
shading_res,
gstate_res);
}
static cairo_int_status_t
_cairo_pdf_surface_add_pdf_pattern (cairo_pdf_surface_t *surface,
const cairo_pattern_t *pattern,
cairo_operator_t op,
const cairo_rectangle_int_t *extents,
cairo_pdf_resource_t *pattern_res,
cairo_pdf_resource_t *gstate_res)
{
return _cairo_pdf_surface_add_pdf_pattern_or_shading (surface,
pattern,
op,
extents,
FALSE,
pattern_res,
gstate_res);
}
static cairo_int_status_t
_cairo_pdf_surface_open_stream (cairo_pdf_surface_t *surface,
cairo_pdf_resource_t *resource,
cairo_bool_t compressed,
const char *fmt,
...)
{
va_list ap;
cairo_pdf_resource_t self, length;
cairo_output_stream_t *output = NULL;
if (resource) {
self = *resource;
_cairo_pdf_surface_update_object (surface, self);
} else {
self = _cairo_pdf_surface_new_object (surface);
if (self.id == 0)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
length = _cairo_pdf_surface_new_object (surface);
if (length.id == 0)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
if (compressed) {
output = _cairo_deflate_stream_create (surface->output);
if (_cairo_output_stream_get_status (output))
return _cairo_output_stream_destroy (output);
}
surface->pdf_stream.active = TRUE;
surface->pdf_stream.self = self;
surface->pdf_stream.length = length;
surface->pdf_stream.compressed = compressed;
surface->current_pattern_is_solid_color = FALSE;
surface->current_operator = CAIRO_OPERATOR_OVER;
_cairo_pdf_operators_reset (&surface->pdf_operators);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Length %d 0 R\n",
surface->pdf_stream.self.id,
surface->pdf_stream.length.id);
if (compressed)
_cairo_output_stream_printf (surface->output,
" /Filter /FlateDecode\n");
if (fmt != NULL) {
va_start (ap, fmt);
_cairo_output_stream_vprintf (surface->output, fmt, ap);
va_end (ap);
}
_cairo_output_stream_printf (surface->output,
">>\n"
"stream\n");
surface->pdf_stream.start_offset = _cairo_output_stream_get_position (surface->output);
if (compressed) {
assert (surface->pdf_stream.old_output == NULL);
surface->pdf_stream.old_output = surface->output;
surface->output = output;
_cairo_pdf_operators_set_stream (&surface->pdf_operators, surface->output);
}
_cairo_pdf_operators_reset (&surface->pdf_operators);
return _cairo_output_stream_get_status (surface->output);
}
static cairo_int_status_t
_cairo_pdf_surface_close_stream (cairo_pdf_surface_t *surface)
{
cairo_int_status_t status;
long length;
if (! surface->pdf_stream.active)
return CAIRO_INT_STATUS_SUCCESS;
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (surface->pdf_stream.compressed) {
cairo_int_status_t status2;
status2 = _cairo_output_stream_destroy (surface->output);
if (likely (status == CAIRO_INT_STATUS_SUCCESS))
status = status2;
surface->output = surface->pdf_stream.old_output;
_cairo_pdf_operators_set_stream (&surface->pdf_operators, surface->output);
surface->pdf_stream.old_output = NULL;
}
length = _cairo_output_stream_get_position (surface->output) -
surface->pdf_stream.start_offset;
_cairo_output_stream_printf (surface->output,
"\n"
"endstream\n"
"endobj\n");
_cairo_pdf_surface_update_object (surface,
surface->pdf_stream.length);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
" %ld\n"
"endobj\n",
surface->pdf_stream.length.id,
length);
surface->pdf_stream.active = FALSE;
if (likely (status == CAIRO_INT_STATUS_SUCCESS))
status = _cairo_output_stream_get_status (surface->output);
return status;
}
static void
_cairo_pdf_surface_write_memory_stream (cairo_pdf_surface_t *surface,
cairo_output_stream_t *mem_stream,
cairo_pdf_resource_t resource,
cairo_pdf_group_resources_t *resources,
cairo_bool_t is_knockout_group,
const cairo_box_double_t *bbox)
{
_cairo_pdf_surface_update_object (surface, resource);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Type /XObject\n"
" /Length %d\n",
resource.id,
_cairo_memory_stream_length (mem_stream));
if (surface->compress_streams) {
_cairo_output_stream_printf (surface->output,
" /Filter /FlateDecode\n");
}
_cairo_output_stream_printf (surface->output,
" /Subtype /Form\n"
" /BBox [ %f %f %f %f ]\n"
" /Group <<\n"
" /Type /Group\n"
" /S /Transparency\n"
" /I true\n"
" /CS /DeviceRGB\n",
bbox->p1.x, bbox->p1.y, bbox->p2.x, bbox->p2.y);
if (is_knockout_group)
_cairo_output_stream_printf (surface->output,
" /K true\n");
_cairo_output_stream_printf (surface->output,
" >>\n"
" /Resources\n");
_cairo_pdf_surface_emit_group_resources (surface, resources, TRUE);
_cairo_output_stream_printf (surface->output,
">>\n"
"stream\n");
_cairo_memory_stream_copy (mem_stream, surface->output);
_cairo_output_stream_printf (surface->output,
"endstream\n"
"endobj\n");
}
static cairo_int_status_t
_cairo_pdf_surface_open_group (cairo_pdf_surface_t *surface,
const cairo_box_double_t *bbox,
cairo_pdf_resource_t *resource)
{
cairo_int_status_t status;
assert (surface->pdf_stream.active == FALSE);
assert (surface->group_stream.active == FALSE);
surface->group_stream.active = TRUE;
surface->group_stream.mem_stream = _cairo_memory_stream_create ();
if (surface->compress_streams) {
surface->group_stream.stream =
_cairo_deflate_stream_create (surface->group_stream.mem_stream);
} else {
surface->group_stream.stream = surface->group_stream.mem_stream;
}
status = _cairo_output_stream_get_status (surface->group_stream.stream);
surface->group_stream.old_output = surface->output;
surface->output = surface->group_stream.stream;
_cairo_pdf_operators_set_stream (&surface->pdf_operators, surface->output);
_cairo_pdf_group_resources_clear (&surface->resources);
if (resource) {
surface->group_stream.resource = *resource;
} else {
surface->group_stream.resource = _cairo_pdf_surface_new_object (surface);
if (surface->group_stream.resource.id == 0)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
surface->group_stream.is_knockout = FALSE;
surface->group_stream.bbox = *bbox;
/* Reset gstate */
_cairo_output_stream_printf (surface->output, "/gs0 gs\n");
surface->current_pattern_is_solid_color = FALSE;
surface->current_operator = CAIRO_OPERATOR_OVER;
_cairo_pdf_operators_reset (&surface->pdf_operators);
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_open_knockout_group (cairo_pdf_surface_t *surface,
const cairo_box_double_t *bbox)
{
cairo_int_status_t status;
status = _cairo_pdf_surface_open_group (surface, bbox, NULL);
if (unlikely (status))
return status;
surface->group_stream.is_knockout = TRUE;
return CAIRO_INT_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_pdf_surface_close_group (cairo_pdf_surface_t *surface,
cairo_pdf_resource_t *group)
{
cairo_int_status_t status = CAIRO_INT_STATUS_SUCCESS, status2;
assert (surface->pdf_stream.active == FALSE);
assert (surface->group_stream.active == TRUE);
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (unlikely (status))
return status;
if (surface->compress_streams) {
status = _cairo_output_stream_destroy (surface->group_stream.stream);
surface->group_stream.stream = NULL;
_cairo_output_stream_printf (surface->group_stream.mem_stream,
"\n");
}
surface->output = surface->group_stream.old_output;
_cairo_pdf_operators_set_stream (&surface->pdf_operators, surface->output);
surface->group_stream.active = FALSE;
_cairo_pdf_surface_write_memory_stream (surface,
surface->group_stream.mem_stream,
surface->group_stream.resource,
&surface->resources,
surface->group_stream.is_knockout,
&surface->group_stream.bbox);
if (group)
*group = surface->group_stream.resource;
status2 = _cairo_output_stream_destroy (surface->group_stream.mem_stream);
if (status == CAIRO_INT_STATUS_SUCCESS)
status = status2;
surface->group_stream.mem_stream = NULL;
surface->group_stream.stream = NULL;
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_open_object_stream (cairo_pdf_surface_t *surface)
{
if (surface->pdf_version < CAIRO_PDF_VERSION_1_5) {
/* Object streams not supported. All objects will be written
* directly to the file. */
assert (surface->pdf_stream.active == FALSE);
assert (surface->group_stream.active == FALSE);
surface->object_stream.stream = surface->output;
} else {
surface->object_stream.resource = _cairo_pdf_surface_new_object (surface);
if (surface->object_stream.resource.id == 0)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_cairo_array_truncate (&surface->object_stream.objects, 0);
surface->object_stream.stream = _cairo_memory_stream_create ();
surface->object_stream.active = TRUE;
}
return _cairo_output_stream_get_status (surface->object_stream.stream);
}
cairo_int_status_t
_cairo_pdf_surface_object_begin (cairo_pdf_surface_t *surface,
cairo_pdf_resource_t resource)
{
cairo_xref_stream_object_t xref_obj;
cairo_pdf_object_t *object;
cairo_int_status_t status;
if (surface->object_stream.active) {
xref_obj.resource = resource;
xref_obj.offset = _cairo_output_stream_get_position (surface->object_stream.stream);
status = _cairo_array_append (&surface->object_stream.objects, &xref_obj);
if (unlikely (status))
return status;
object = _cairo_array_index (&surface->objects, resource.id - 1);
object->type = PDF_OBJECT_COMPRESSED;
object->u.compressed_obj.xref_stream = surface->object_stream.resource;
object->u.compressed_obj.index = _cairo_array_num_elements (&surface->object_stream.objects) - 1;
} else {
_cairo_pdf_surface_update_object (surface, resource);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n",
resource.id);
}
return CAIRO_INT_STATUS_SUCCESS;
}
void
_cairo_pdf_surface_object_end (cairo_pdf_surface_t *surface)
{
if (!surface->object_stream.active) {
_cairo_output_stream_printf (surface->output,
"endobj\n");
}
}
static int _cairo_xref_stream_object_compare (const void *a, const void *b)
{
const cairo_xref_stream_object_t *a_obj = a;
const cairo_xref_stream_object_t *b_obj = b;
if (a_obj->offset < b_obj->offset)
return -1;
else if (a_obj->offset > b_obj->offset)
return 1;
else
return 0;
}
static cairo_int_status_t
_cairo_pdf_surface_close_object_stream (cairo_pdf_surface_t *surface)
{
int i, num_objects;
cairo_xref_stream_object_t *xref_obj;
long start_pos, length;
cairo_output_stream_t *index_stream;
cairo_output_stream_t *deflate_stream;
cairo_pdf_resource_t length_res;
cairo_int_status_t status;
cairo_pdf_object_t *object;
if (!surface->object_stream.active) {
surface->object_stream.stream = NULL;
return CAIRO_INT_STATUS_SUCCESS;
}
num_objects = _cairo_array_num_elements (&surface->object_stream.objects);
if (num_objects == 0) {
object = _cairo_array_index (&surface->objects, surface->object_stream.resource.id - 1);
object->type = PDF_OBJECT_FREE;
return CAIRO_INT_STATUS_SUCCESS;
}
index_stream = _cairo_memory_stream_create ();
/* PDF requires the object id/offset pairs to be sorted by offset. */
_cairo_array_sort (&surface->object_stream.objects, _cairo_xref_stream_object_compare);
for (i = 0; i < num_objects; i++) {
xref_obj = _cairo_array_index (&surface->object_stream.objects, i);
_cairo_output_stream_printf (index_stream,
"%d %ld\n",
xref_obj->resource.id,
xref_obj->offset);
}
length_res = _cairo_pdf_surface_new_object (surface);
if (length_res.id == 0)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_cairo_pdf_surface_update_object (surface, surface->object_stream.resource);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Type /ObjStm\n"
" /Length %d 0 R\n"
" /N %d\n"
" /First %d\n",
surface->object_stream.resource.id,
length_res.id,
num_objects,
_cairo_memory_stream_length (index_stream));
if (surface->compress_streams) {
_cairo_output_stream_printf (surface->output,
" /Filter /FlateDecode\n");
}
_cairo_output_stream_printf (surface->output,
">>\n"
"stream\n");
start_pos = _cairo_output_stream_get_position (surface->output);
if (surface->compress_streams) {
deflate_stream = _cairo_deflate_stream_create (surface->output);
_cairo_memory_stream_copy (index_stream, deflate_stream);
_cairo_memory_stream_copy (surface->object_stream.stream, deflate_stream);
status = _cairo_output_stream_destroy (deflate_stream);
if (unlikely (status))
return status;
length = _cairo_output_stream_get_position (surface->output) - start_pos;
} else {
_cairo_memory_stream_copy (index_stream, surface->output);
_cairo_memory_stream_copy (surface->object_stream.stream, surface->output);
length = _cairo_output_stream_get_position (surface->output) - start_pos;
}
_cairo_output_stream_printf (surface->output,
"\n"
"endstream\n"
"endobj\n");
_cairo_pdf_surface_update_object (surface,
length_res);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
" %ld\n"
"endobj\n",
length_res.id,
length);
status = _cairo_output_stream_destroy (index_stream);
if (unlikely (status))
return status;
status = _cairo_output_stream_destroy (surface->object_stream.stream);
if (unlikely (status))
return status;
surface->object_stream.stream = NULL;
surface->object_stream.active = FALSE;
return _cairo_output_stream_get_status (surface->output);
}
static cairo_int_status_t
_cairo_pdf_surface_open_content_stream (cairo_pdf_surface_t *surface,
const cairo_box_double_t *bbox,
cairo_pdf_resource_t *resource,
cairo_bool_t is_form,
cairo_bool_t is_group)
{
cairo_int_status_t status;
assert (surface->pdf_stream.active == FALSE);
assert (surface->group_stream.active == FALSE);
surface->content_resources = _cairo_pdf_surface_new_object (surface);
if (surface->content_resources.id == 0)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
if (is_form) {
assert (bbox != NULL);
if (is_group) {
status =
_cairo_pdf_surface_open_stream (surface,
resource,
surface->compress_streams,
" /Type /XObject\n"
" /Subtype /Form\n"
" /BBox [ %f %f %f %f ]\n"
" /Group <<\n"
" /Type /Group\n"
" /S /Transparency\n"
" /I true\n"
" /CS /DeviceRGB\n"
" >>\n"
" /Resources %d 0 R\n",
bbox->p1.x,
bbox->p1.y,
bbox->p2.x,
bbox->p2.y,
surface->content_resources.id);
} else {
status =
_cairo_pdf_surface_open_stream (surface,
resource,
surface->compress_streams,
" /Type /XObject\n"
" /Subtype /Form\n"
" /BBox [ %f %f %f %f ]\n"
" /Resources %d 0 R\n",
bbox->p1.x,
bbox->p1.y,
bbox->p2.x,
bbox->p2.y,
surface->content_resources.id);
}
} else {
status =
_cairo_pdf_surface_open_stream (surface,
resource,
surface->compress_streams,
NULL);
_cairo_output_stream_printf (surface->output,
"1 0 0 -1 0 %f cm\n",
surface->height);
}
if (unlikely (status))
return status;
surface->content = surface->pdf_stream.self;
_cairo_output_stream_printf (surface->output, "q\n");
_cairo_pdf_operators_reset (&surface->pdf_operators);
return _cairo_output_stream_get_status (surface->output);
}
static cairo_int_status_t
_cairo_pdf_surface_close_content_stream (cairo_pdf_surface_t *surface,
cairo_bool_t is_form)
{
cairo_int_status_t status;
assert (surface->pdf_stream.active == TRUE);
assert (surface->group_stream.active == FALSE);
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output, "Q\n");
status = _cairo_pdf_surface_close_stream (surface);
if (unlikely (status))
return status;
_cairo_pdf_surface_update_object (surface, surface->content_resources);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n",
surface->content_resources.id);
_cairo_pdf_surface_emit_group_resources (surface, &surface->resources, is_form);
_cairo_output_stream_printf (surface->output,
"endobj\n");
return _cairo_output_stream_get_status (surface->output);
}
static void
_cairo_pdf_source_surface_entry_pluck (void *entry, void *closure)
{
cairo_pdf_source_surface_entry_t *surface_entry = entry;
cairo_hash_table_t *patterns = closure;
_cairo_hash_table_remove (patterns, &surface_entry->base);
free (surface_entry->unique_id);
free (surface_entry);
}
static cairo_status_t
_cairo_pdf_surface_finish (void *abstract_surface)
{
cairo_pdf_surface_t *surface = abstract_surface;
long offset;
cairo_pdf_resource_t catalog;
cairo_status_t status = CAIRO_STATUS_SUCCESS, status2;
int size, i;
cairo_pdf_source_surface_t doc_surface;
cairo_pdf_jbig2_global_t *global;
char *label;
cairo_pdf_resource_t xref_res;
/* Some of the data may be in an inconistent state if there is an error status. */
if (surface->base.status != CAIRO_STATUS_SUCCESS)
goto CLEANUP;
_cairo_pdf_surface_clear (surface);
status = _cairo_pdf_surface_open_object_stream (surface);
if (unlikely (status))
return status;
/* Emit unbounded surfaces */
_cairo_pdf_surface_write_patterns_and_smask_groups (surface, TRUE);
status = surface->base.status;
if (status == CAIRO_STATUS_SUCCESS)
status = _cairo_pdf_surface_emit_font_subsets (surface);
status = _cairo_pdf_surface_write_pages (surface);
if (unlikely (status))
return status;
status = _cairo_pdf_interchange_write_document_objects (surface);
if (unlikely (status))
return status;
catalog = _cairo_pdf_surface_new_object (surface);
if (catalog.id == 0)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
status = _cairo_pdf_surface_write_catalog (surface, catalog);
if (unlikely (status))
return status;
status = _cairo_pdf_surface_close_object_stream (surface);
if (unlikely (status))
return status;
if (surface->pdf_version >= CAIRO_PDF_VERSION_1_5)
{
xref_res = _cairo_pdf_surface_new_object (surface);
status = _cairo_pdf_surface_write_xref_stream (surface,
xref_res,
catalog,
surface->docinfo_res,
&offset);
} else {
offset = _cairo_pdf_surface_write_xref (surface);
_cairo_output_stream_printf (surface->output,
"trailer\n"
"<< /Size %d\n"
" /Root %d 0 R\n"
" /Info %d 0 R\n"
">>\n",
surface->next_available_resource.id,
catalog.id,
surface->docinfo_res.id);
}
_cairo_output_stream_printf (surface->output,
"startxref\n"
"%ld\n"
"%%%%EOF\n",
offset);
CLEANUP:
/* pdf_operators has already been flushed when the last stream was
* closed so we should never be writing anything here - however,
* the stream may itself be in an error state. */
status2 = _cairo_pdf_operators_fini (&surface->pdf_operators);
if (status == CAIRO_STATUS_SUCCESS)
status = status2;
/* close any active streams still open due to fatal errors */
status2 = _cairo_pdf_surface_close_stream (surface);
if (status == CAIRO_STATUS_SUCCESS)
status = status2;
if (surface->group_stream.stream != NULL) {
status2 = _cairo_output_stream_destroy (surface->group_stream.stream);
if (status == CAIRO_STATUS_SUCCESS)
status = status2;
}
if (surface->group_stream.mem_stream != NULL) {
status2 = _cairo_output_stream_destroy (surface->group_stream.mem_stream);
if (status == CAIRO_STATUS_SUCCESS)
status = status2;
}
if (surface->pdf_stream.active)
surface->output = surface->pdf_stream.old_output;
if (surface->group_stream.active)
surface->output = surface->group_stream.old_output;
/* and finish the pdf surface */
status2 = _cairo_output_stream_destroy (surface->output);
if (status == CAIRO_STATUS_SUCCESS)
status = status2;
_cairo_pdf_group_resources_fini (&surface->resources);
_cairo_array_fini (&surface->objects);
_cairo_array_fini (&surface->pages);
_cairo_array_fini (&surface->rgb_linear_functions);
_cairo_array_fini (&surface->alpha_linear_functions);
_cairo_array_fini (&surface->page_patterns);
_cairo_array_fini (&surface->page_surfaces);
_cairo_array_fini (&surface->object_stream.objects);
size = _cairo_array_num_elements (&surface->doc_surfaces);
for (i = 0; i < size; i++) {
_cairo_array_copy_element (&surface->doc_surfaces, i, &doc_surface);
cairo_surface_destroy (doc_surface.surface);
}
_cairo_array_fini (&surface->doc_surfaces);
_cairo_hash_table_foreach (surface->all_surfaces,
_cairo_pdf_source_surface_entry_pluck,
surface->all_surfaces);
_cairo_hash_table_destroy (surface->all_surfaces);
_cairo_array_fini (&surface->smask_groups);
_cairo_array_fini (&surface->fonts);
_cairo_array_fini (&surface->knockout_group);
_cairo_array_fini (&surface->page_annots);
_cairo_array_fini (&surface->forward_links);
if (surface->font_subsets) {
_cairo_scaled_font_subsets_destroy (surface->font_subsets);
surface->font_subsets = NULL;
}
size = _cairo_array_num_elements (&surface->jbig2_global);
for (i = 0; i < size; i++) {
global = (cairo_pdf_jbig2_global_t *) _cairo_array_index (&surface->jbig2_global, i);
free(global->id);
if (!global->emitted)
return _cairo_error (CAIRO_STATUS_JBIG2_GLOBAL_MISSING);
}
_cairo_array_fini (&surface->jbig2_global);
_cairo_array_fini (&surface->page_heights);
size = _cairo_array_num_elements (&surface->page_labels);
for (i = 0; i < size; i++) {
_cairo_array_copy_element (&surface->page_labels, i, &label);
free (label);
}
_cairo_array_fini (&surface->page_labels);
_cairo_surface_clipper_reset (&surface->clipper);
_cairo_pdf_interchange_fini (surface);
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_start_page (void *abstract_surface)
{
cairo_pdf_surface_t *surface = abstract_surface;
cairo_pdf_resource_t page;
cairo_int_status_t status;
/* Document header */
if (! surface->header_emitted) {
const char *version;
switch (surface->pdf_version) {
case CAIRO_PDF_VERSION_1_4:
version = "1.4";
break;
default:
case CAIRO_PDF_VERSION_1_5:
version = "1.5";
break;
}
_cairo_output_stream_printf (surface->output,
"%%PDF-%s\n", version);
_cairo_output_stream_printf (surface->output,
"%%%c%c%c%c\n", 181, 237, 174, 251);
surface->header_emitted = TRUE;
}
_cairo_pdf_group_resources_clear (&surface->resources);
surface->in_xobject = FALSE;
page = _cairo_pdf_surface_new_object (surface);
if (page.id == 0)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
status = _cairo_array_append (&surface->pages, &page);
if (unlikely (status))
return status;
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_pdf_surface_has_fallback_images (void *abstract_surface,
cairo_bool_t has_fallbacks)
{
cairo_int_status_t status;
cairo_pdf_surface_t *surface = abstract_surface;
cairo_box_double_t bbox;
surface->has_fallback_images = has_fallbacks;
surface->in_xobject = has_fallbacks;
bbox.p1.x = 0;
bbox.p1.y = 0;
bbox.p2.x = surface->width;
bbox.p2.y = surface->height;
status = _cairo_pdf_surface_open_content_stream (surface, &bbox, NULL, has_fallbacks, has_fallbacks);
if (unlikely (status))
return status;
return CAIRO_STATUS_SUCCESS;
}
static cairo_bool_t
_cairo_pdf_surface_supports_fine_grained_fallbacks (void *abstract_surface)
{
return TRUE;
}
static cairo_bool_t
_cairo_pdf_surface_requires_thumbnail_image (void *abstract_surface,
int *width,
int *height)
{
cairo_pdf_surface_t *surface = abstract_surface;
if (surface->thumbnail_width > 0 && surface->thumbnail_height > 0) {
*width = surface->thumbnail_width;
*height = surface->thumbnail_height;
return TRUE;
}
return FALSE;
}
static cairo_int_status_t
_cairo_pdf_surface_set_thumbnail_image (void *abstract_surface,
cairo_image_surface_t *image)
{
cairo_pdf_surface_t *surface = abstract_surface;
surface->thumbnail_image = (cairo_image_surface_t *)cairo_surface_reference(&image->base);
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_pdf_surface_add_padded_image_surface (cairo_pdf_surface_t *surface,
const cairo_pattern_t *source,
const cairo_rectangle_int_t *extents,
cairo_pdf_source_surface_entry_t **pdf_source,
double *x_offset,
double *y_offset,
cairo_rectangle_int_t *source_extents)
{
cairo_image_surface_t *image;
cairo_surface_t *pad_image;
void *image_extra;
cairo_int_status_t status;
int w, h;
cairo_box_t box;
cairo_rectangle_int_t rect;
cairo_surface_pattern_t pad_pattern;
status = _cairo_pdf_surface_acquire_source_image_from_pattern (surface, source,
&image, &image_extra);
if (unlikely (status))
return status;
pad_image = &image->base;
/* get the operation extents in pattern space */
_cairo_box_from_rectangle (&box, extents);
_cairo_matrix_transform_bounding_box_fixed (&source->matrix, &box, NULL);
_cairo_box_round_to_rectangle (&box, &rect);
/* Check if image needs padding to fill extents */
w = image->width;
h = image->height;
if (_cairo_fixed_integer_ceil(box.p1.x) < 0 ||
_cairo_fixed_integer_ceil(box.p1.y) < 0 ||
_cairo_fixed_integer_floor(box.p2.x) > w ||
_cairo_fixed_integer_floor(box.p2.y) > h)
{
pad_image = _cairo_image_surface_create_with_content (image->base.content,
rect.width,
rect.height);
if (pad_image->status) {
status = pad_image->status;
goto BAIL;
}
_cairo_pattern_init_for_surface (&pad_pattern, &image->base);
cairo_matrix_init_translate (&pad_pattern.base.matrix, rect.x, rect.y);
pad_pattern.base.extend = CAIRO_EXTEND_PAD;
status = _cairo_surface_paint (pad_image,
CAIRO_OPERATOR_SOURCE, &pad_pattern.base,
NULL);
_cairo_pattern_fini (&pad_pattern.base);
if (unlikely (status))
goto BAIL;
}
status = _cairo_pdf_surface_add_source_surface (surface,
pad_image,
NULL,
CAIRO_OPERATOR_OVER, /* not used for images */
source->filter,
FALSE, /* stencil mask */
FALSE, /* smask */
FALSE, /* need_transp_group */
extents,
NULL, /* smask_res */
pdf_source,
x_offset,
y_offset,
source_extents);
if (unlikely (status))
goto BAIL;
if (pad_image != &image->base) {
/* If using a padded image, replace _add_source_surface
* x/y_offset with padded image offset. Note:
* _add_source_surface only sets a non zero x/y_offset for
* RASTER_SOURCE patterns. _add_source_surface will always set
* x/y_offset to 0 for surfaces so we can ignore the returned
* offset and replace it with the offset required for the
* padded image */
*x_offset = rect.x;
*y_offset = rect.y;
}
BAIL:
if (pad_image != &image->base)
cairo_surface_destroy (pad_image);
_cairo_pdf_surface_release_source_image_from_pattern (surface, source, image, image_extra);
return status;
}
/* Emit alpha channel from the image into stream_res.
*/
static cairo_int_status_t
_cairo_pdf_surface_emit_smask (cairo_pdf_surface_t *surface,
cairo_image_surface_t *image,
cairo_bool_t stencil_mask,
cairo_bool_t interpolate,
cairo_pdf_resource_t *stream_res)
{
cairo_int_status_t status = CAIRO_STATUS_SUCCESS;
char *alpha;
unsigned long alpha_size;
uint32_t *pixel32;
uint8_t *pixel8;
int i, x, y, bit, a;
cairo_image_transparency_t transparency;
/* This is the only image format we support, which simplifies things. */
assert (image->format == CAIRO_FORMAT_ARGB32 ||
image->format == CAIRO_FORMAT_RGB24 ||
image->format == CAIRO_FORMAT_A8 ||
image->format == CAIRO_FORMAT_A1 );
transparency = _cairo_image_analyze_transparency (image);
if (stencil_mask) {
assert (transparency == CAIRO_IMAGE_IS_OPAQUE ||
transparency == CAIRO_IMAGE_HAS_BILEVEL_ALPHA);
} else {
assert (transparency != CAIRO_IMAGE_IS_OPAQUE);
}
if (transparency == CAIRO_IMAGE_HAS_BILEVEL_ALPHA || transparency == CAIRO_IMAGE_IS_OPAQUE) {
alpha_size = (image->width + 7) / 8 * image->height;
alpha = _cairo_malloc_ab ((image->width+7) / 8, image->height);
} else {
alpha_size = image->height * image->width;
alpha = _cairo_malloc_ab (image->height, image->width);
}
if (unlikely (alpha == NULL)) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto CLEANUP;
}
i = 0;
for (y = 0; y < image->height; y++) {
if (transparency == CAIRO_IMAGE_IS_OPAQUE) {
for (x = 0; x < (image->width + 7) / 8; x++)
alpha[i++] = 0xff;
} else if (image->format == CAIRO_FORMAT_A1) {
pixel8 = (uint8_t *) (image->data + y * image->stride);
for (x = 0; x < (image->width + 7) / 8; x++, pixel8++) {
a = *pixel8;
a = CAIRO_BITSWAP8_IF_LITTLE_ENDIAN (a);
alpha[i++] = a;
}
} else {
pixel8 = (uint8_t *) (image->data + y * image->stride);
pixel32 = (uint32_t *) (image->data + y * image->stride);
bit = 7;
for (x = 0; x < image->width; x++) {
if (image->format == CAIRO_FORMAT_ARGB32) {
a = (*pixel32 & 0xff000000) >> 24;
pixel32++;
} else {
a = *pixel8;
pixel8++;
}
if (transparency == CAIRO_IMAGE_HAS_ALPHA) {
alpha[i++] = a;
} else { /* transparency == CAIRO_IMAGE_HAS_BILEVEL_ALPHA or CAIRO_IMAGE_IS_OPAQUE */
if (bit == 7)
alpha[i] = 0;
if (a != 0)
alpha[i] |= (1 << bit);
bit--;
if (bit < 0) {
bit = 7;
i++;
}
}
}
if (bit != 7)
i++;
}
}
if (stencil_mask) {
status = _cairo_pdf_surface_open_stream (surface,
stream_res,
TRUE,
" /Type /XObject\n"
" /Subtype /Image\n"
" /ImageMask true\n"
" /Width %d\n"
" /Height %d\n"
" /Interpolate %s\n"
" /BitsPerComponent 1\n"
" /Decode [1 0]\n",
image->width, image->height,
interpolate ? "true" : "false");
} else {
status = _cairo_pdf_surface_open_stream (surface,
stream_res,
TRUE,
" /Type /XObject\n"
" /Subtype /Image\n"
" /Width %d\n"
" /Height %d\n"
" /ColorSpace /DeviceGray\n"
" /Interpolate %s\n"
" /BitsPerComponent %d\n",
image->width, image->height,
interpolate ? "true" : "false",
transparency == CAIRO_IMAGE_HAS_ALPHA ? 8 : 1);
}
if (unlikely (status))
goto CLEANUP_ALPHA;
_cairo_output_stream_write (surface->output, alpha, alpha_size);
status = _cairo_pdf_surface_close_stream (surface);
CLEANUP_ALPHA:
free (alpha);
CLEANUP:
return status;
}
/**
* _cairo_pdf_surface_emit_image:
* @surface: the pdf surface
* @image_surf: The image to write
* @surface_entry: Contains image resource, smask resource, interpolate and stencil mask parameters.
*
* Emit an image stream using the @image_res resource and write out
* the image data from @image_surf. If @smask_res is not null, @smask_res will
* be specified as the smask for the image. Otherwise emit the an smask if
* the image is requires one.
**/
static cairo_int_status_t
_cairo_pdf_surface_emit_image (cairo_pdf_surface_t *surface,
cairo_image_surface_t *image_surf,
cairo_pdf_source_surface_entry_t *surface_entry)
{
cairo_int_status_t status = CAIRO_STATUS_SUCCESS;
char *data;
unsigned long data_size;
uint32_t *pixel;
int i, x, y, bit;
cairo_pdf_resource_t smask = {0}; /* squelch bogus compiler warning */
cairo_bool_t need_smask;
cairo_image_color_t color;
cairo_image_surface_t *image;
cairo_image_transparency_t transparency;
char smask_buf[30];
image = image_surf;
if (image->format != CAIRO_FORMAT_RGB24 &&
image->format != CAIRO_FORMAT_ARGB32 &&
image->format != CAIRO_FORMAT_A8 &&
image->format != CAIRO_FORMAT_A1)
{
cairo_surface_t *surf;
cairo_surface_pattern_t pattern;
surf = _cairo_image_surface_create_with_content (image_surf->base.content,
image_surf->width,
image_surf->height);
image = (cairo_image_surface_t *) surf;
if (surf->status) {
status = surf->status;
goto CLEANUP;
}
_cairo_pattern_init_for_surface (&pattern, &image_surf->base);
status = _cairo_surface_paint (surf,
CAIRO_OPERATOR_SOURCE, &pattern.base,
NULL);
_cairo_pattern_fini (&pattern.base);
if (unlikely (status))
goto CLEANUP;
}
if (surface_entry->smask || surface_entry->stencil_mask) {
return _cairo_pdf_surface_emit_smask (surface, image,
surface_entry->stencil_mask,
surface_entry->interpolate,
&surface_entry->surface_res);
}
color = _cairo_image_analyze_color (image);
switch (color) {
default:
case CAIRO_IMAGE_UNKNOWN_COLOR:
ASSERT_NOT_REACHED;
case CAIRO_IMAGE_IS_COLOR:
data_size = image->height * image->width * 3;
data = _cairo_malloc_abc (image->width, image->height, 3);
break;
case CAIRO_IMAGE_IS_GRAYSCALE:
data_size = image->height * image->width;
data = _cairo_malloc_ab (image->width, image->height);
break;
case CAIRO_IMAGE_IS_MONOCHROME:
data_size = (image->width + 7) / 8 * image->height;
data = _cairo_malloc_ab ((image->width+7) / 8, image->height);
break;
}
if (unlikely (data == NULL)) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto CLEANUP;
}
i = 0;
for (y = 0; y < image->height; y++) {
pixel = (uint32_t *) (image->data + y * image->stride);
bit = 7;
for (x = 0; x < image->width; x++, pixel++) {
int r, g, b;
/* XXX: We're un-premultiplying alpha here. My reading of the PDF
* specification suggests that we should be able to avoid having
* to do this by filling in the SMask's Matte dictionary
* appropriately, but my attempts to do that so far have
* failed. */
if (image->format == CAIRO_FORMAT_ARGB32) {
uint8_t a;
a = (*pixel & 0xff000000) >> 24;
if (a == 0) {
r = g = b = 0;
} else {
r = (((*pixel & 0xff0000) >> 16) * 255 + a / 2) / a;
g = (((*pixel & 0x00ff00) >> 8) * 255 + a / 2) / a;
b = (((*pixel & 0x0000ff) >> 0) * 255 + a / 2) / a;
}
} else if (image->format == CAIRO_FORMAT_RGB24) {
r = (*pixel & 0x00ff0000) >> 16;
g = (*pixel & 0x0000ff00) >> 8;
b = (*pixel & 0x000000ff) >> 0;
} else {
r = g = b = 0;
}
switch (color) {
case CAIRO_IMAGE_IS_COLOR:
case CAIRO_IMAGE_UNKNOWN_COLOR:
data[i++] = r;
data[i++] = g;
data[i++] = b;
break;
case CAIRO_IMAGE_IS_GRAYSCALE:
data[i++] = r;
break;
case CAIRO_IMAGE_IS_MONOCHROME:
if (bit == 7)
data[i] = 0;
if (r != 0)
data[i] |= (1 << bit);
bit--;
if (bit < 0) {
bit = 7;
i++;
}
break;
}
}
if (bit != 7)
i++;
}
if (surface_entry->smask_res.id != 0) {
need_smask = TRUE;
smask = surface_entry->smask_res;
} else {
need_smask = FALSE;
if (image->format == CAIRO_FORMAT_ARGB32 ||
image->format == CAIRO_FORMAT_A8 ||
image->format == CAIRO_FORMAT_A1)
{
transparency = _cairo_image_analyze_transparency (image);
if (transparency != CAIRO_IMAGE_IS_OPAQUE) {
need_smask = TRUE;
smask = _cairo_pdf_surface_new_object (surface);
if (smask.id == 0) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto CLEANUP_RGB;
}
status = _cairo_pdf_surface_emit_smask (surface, image, FALSE, surface_entry->interpolate, &smask);
if (unlikely (status))
goto CLEANUP_RGB;
}
}
}
if (need_smask)
snprintf(smask_buf, sizeof(smask_buf), " /SMask %d 0 R\n", smask.id);
else
smask_buf[0] = 0;
status = _cairo_pdf_surface_open_stream (surface,
&surface_entry->surface_res,
TRUE,
" /Type /XObject\n"
" /Subtype /Image\n"
" /Width %d\n"
" /Height %d\n"
" /ColorSpace %s\n"
" /Interpolate %s\n"
" /BitsPerComponent %d\n"
"%s",
image->width,
image->height,
color == CAIRO_IMAGE_IS_COLOR ? "/DeviceRGB" : "/DeviceGray",
surface_entry->interpolate ? "true" : "false",
color == CAIRO_IMAGE_IS_MONOCHROME? 1 : 8,
smask_buf);
if (unlikely (status))
goto CLEANUP_RGB;
#undef IMAGE_DICTIONARY
_cairo_output_stream_write (surface->output, data, data_size);
status = _cairo_pdf_surface_close_stream (surface);
CLEANUP_RGB:
free (data);
CLEANUP:
if (image != image_surf)
cairo_surface_destroy (&image->base);
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_lookup_jbig2_global (cairo_pdf_surface_t *surface,
const unsigned char *global_id,
unsigned long global_id_length,
cairo_pdf_jbig2_global_t **entry)
{
cairo_pdf_jbig2_global_t global;
int size, i;
cairo_int_status_t status;
size = _cairo_array_num_elements (&surface->jbig2_global);
for (i = 0; i < size; i++) {
*entry = (cairo_pdf_jbig2_global_t *) _cairo_array_index (&surface->jbig2_global, i);
if ((*entry)->id && global_id && (*entry)->id_length == global_id_length
&& memcmp((*entry)->id, global_id, global_id_length) == 0) {
return CAIRO_STATUS_SUCCESS;
}
}
global.id = _cairo_malloc (global_id_length);
if (unlikely (global.id == NULL)) {
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
memcpy (global.id, global_id, global_id_length);
global.id_length = global_id_length;
global.res = _cairo_pdf_surface_new_object (surface);
if (global.res.id == 0) {
free(global.id);
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
global.emitted = FALSE;
status = _cairo_array_append (&surface->jbig2_global, &global);
if (unlikely(status))
return status;
size = _cairo_array_num_elements (&surface->jbig2_global);
*entry = (cairo_pdf_jbig2_global_t *) _cairo_array_index (&surface->jbig2_global, size - 1);
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_pdf_surface_emit_jbig2_image (cairo_pdf_surface_t *surface,
cairo_surface_t *source,
cairo_pdf_source_surface_entry_t *surface_entry,
cairo_bool_t test)
{
cairo_int_status_t status;
const unsigned char *mime_data;
unsigned long mime_data_length;
cairo_image_info_t info;
const unsigned char *global_id;
unsigned long global_id_length;
const unsigned char *global_data;
unsigned long global_data_length;
cairo_pdf_jbig2_global_t *global_entry = NULL; /* hide compiler warning */
char smask_buf[30];
char decode_parms_buf[100];
cairo_surface_get_mime_data (source, CAIRO_MIME_TYPE_JBIG2,
&mime_data, &mime_data_length);
if (mime_data == NULL)
return CAIRO_INT_STATUS_UNSUPPORTED;
status = _cairo_image_info_get_jbig2_info (&info, mime_data, mime_data_length);
if (status)
return status;
/* At this point we know emitting jbig2 will succeed. */
if (test)
return CAIRO_STATUS_SUCCESS;
cairo_surface_get_mime_data (source, CAIRO_MIME_TYPE_JBIG2_GLOBAL_ID,
&global_id, &global_id_length);
if (global_id && global_id_length > 0) {
status = _cairo_pdf_surface_lookup_jbig2_global (surface, global_id, global_id_length, &global_entry);
if (unlikely(status))
return status;
if (!global_entry->emitted) {
cairo_surface_get_mime_data (source, CAIRO_MIME_TYPE_JBIG2_GLOBAL,
&global_data, &global_data_length);
if (global_data) {
status = _cairo_pdf_surface_open_stream (surface, &global_entry->res, FALSE, NULL);
if (unlikely(status))
return status;
_cairo_output_stream_write (surface->output, global_data, global_data_length);
status = _cairo_pdf_surface_close_stream (surface);
if (unlikely(status))
return status;
global_entry->emitted = TRUE;
}
}
snprintf(decode_parms_buf, sizeof(decode_parms_buf),
" /DecodeParms << /JBIG2Globals %d 0 R >>\n", global_entry->res.id);
} else {
decode_parms_buf[0] = 0;
}
if (surface_entry->smask_res.id)
snprintf(smask_buf, sizeof(smask_buf), " /SMask %d 0 R\n", surface_entry->smask_res.id);
else
smask_buf[0] = 0;
if (surface_entry->stencil_mask) {
status = _cairo_pdf_surface_open_stream (surface,
&surface_entry->surface_res,
FALSE,
" /Type /XObject\n"
" /Subtype /Image\n"
" /ImageMask true\n"
" /Width %d\n"
" /Height %d\n"
" /Interpolate %s\n"
" /BitsPerComponent 1\n"
" /Decode [1 0]\n"
" /Filter /JPXDecode\n"
"%s",
info.width,
info.height,
surface_entry->interpolate ? "true" : "false",
decode_parms_buf);
} else {
status = _cairo_pdf_surface_open_stream (surface,
&surface_entry->surface_res,
FALSE,
" /Type /XObject\n"
" /Subtype /Image\n"
" /Width %d\n"
" /Height %d\n"
" /ColorSpace /DeviceGray\n"
" /BitsPerComponent 1\n"
" /Interpolate %s\n"
"%s"
" /Filter /JBIG2Decode\n"
"%s",
info.width,
info.height,
surface_entry->interpolate ? "true" : "false",
smask_buf,
decode_parms_buf);
}
if (unlikely(status))
return status;
_cairo_output_stream_write (surface->output, mime_data, mime_data_length);
status = _cairo_pdf_surface_close_stream (surface);
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_emit_jpx_image (cairo_pdf_surface_t *surface,
cairo_surface_t *source,
cairo_pdf_source_surface_entry_t *surface_entry,
cairo_bool_t test)
{
cairo_int_status_t status;
const unsigned char *mime_data;
unsigned long mime_data_length;
cairo_image_info_t info;
char smask_buf[30];
if (surface->pdf_version < CAIRO_PDF_VERSION_1_5)
return CAIRO_INT_STATUS_UNSUPPORTED;
cairo_surface_get_mime_data (source, CAIRO_MIME_TYPE_JP2,
&mime_data, &mime_data_length);
if (mime_data == NULL)
return CAIRO_INT_STATUS_UNSUPPORTED;
status = _cairo_image_info_get_jpx_info (&info, mime_data, mime_data_length);
if (status)
return status;
if ((surface_entry->smask || surface_entry->stencil_mask) && info.num_components != 1)
return CAIRO_INT_STATUS_UNSUPPORTED;
if ((surface_entry->stencil_mask) && info.bits_per_component != 1)
return CAIRO_INT_STATUS_UNSUPPORTED;
if (surface_entry->smask_res.id)
snprintf(smask_buf, sizeof(smask_buf), " /SMask %d 0 R\n", surface_entry->smask_res.id);
else
smask_buf[0] = 0;
/* At this point we know emitting jpx will succeed. */
if (test)
return CAIRO_STATUS_SUCCESS;
if (surface_entry->stencil_mask) {
status = _cairo_pdf_surface_open_stream (surface,
&surface_entry->surface_res,
FALSE,
" /Type /XObject\n"
" /Subtype /Image\n"
" /ImageMask true\n"
" /Width %d\n"
" /Height %d\n"
" /Interpolate %s\n"
" /BitsPerComponent 1\n"
" /Decode [1 0]\n"
" /Filter /JPXDecode\n",
info.width,
info.height,
surface_entry->interpolate ? "true" : "false");
} else {
status = _cairo_pdf_surface_open_stream (surface,
&surface_entry->surface_res,
FALSE,
" /Type /XObject\n"
" /Subtype /Image\n"
" /Width %d\n"
" /Height %d\n"
" /Interpolate %s\n"
"%s"
" /Filter /JPXDecode\n",
info.width,
info.height,
surface_entry->interpolate ? "true" : "false",
smask_buf);
}
if (status)
return status;
_cairo_output_stream_write (surface->output, mime_data, mime_data_length);
status = _cairo_pdf_surface_close_stream (surface);
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_emit_jpeg_image (cairo_pdf_surface_t *surface,
cairo_surface_t *source,
cairo_pdf_source_surface_entry_t *surface_entry,
cairo_bool_t test)
{
cairo_int_status_t status;
const unsigned char *mime_data;
unsigned long mime_data_length;
cairo_image_info_t info;
const char *colorspace;
char smask_buf[30];
cairo_surface_get_mime_data (source, CAIRO_MIME_TYPE_JPEG,
&mime_data, &mime_data_length);
if (unlikely (source->status))
return source->status;
if (mime_data == NULL)
return CAIRO_INT_STATUS_UNSUPPORTED;
status = _cairo_image_info_get_jpeg_info (&info, mime_data, mime_data_length);
if (unlikely (status))
return status;
if ((surface_entry->smask || surface_entry->stencil_mask) && info.num_components != 1)
return CAIRO_INT_STATUS_UNSUPPORTED;
if ((surface_entry->stencil_mask) && info.bits_per_component != 1)
return CAIRO_INT_STATUS_UNSUPPORTED;
switch (info.num_components) {
case 1:
colorspace = "/DeviceGray";
break;
case 3:
colorspace = "/DeviceRGB";
break;
case 4:
colorspace = "/DeviceCMYK";
break;
default:
return CAIRO_INT_STATUS_UNSUPPORTED;
}
/* At this point we know emitting jpeg will succeed. */
if (test)
return CAIRO_STATUS_SUCCESS;
if (surface_entry->smask_res.id)
snprintf(smask_buf, sizeof(smask_buf), " /SMask %d 0 R\n", surface_entry->smask_res.id);
else
smask_buf[0] = 0;
if (surface_entry->stencil_mask) {
status = _cairo_pdf_surface_open_stream (surface,
&surface_entry->surface_res,
FALSE,
" /Type /XObject\n"
" /Subtype /Image\n"
" /ImageMask true\n"
" /Width %d\n"
" /Height %d\n"
" /Interpolate %s\n"
" /BitsPerComponent 1\n"
" /Decode [1 0]\n"
" /Filter /DCTDecode\n",
info.width,
info.height,
surface_entry->interpolate ? "true" : "false");
} else {
status = _cairo_pdf_surface_open_stream (surface,
&surface_entry->surface_res,
FALSE,
" /Type /XObject\n"
" /Subtype /Image\n"
" /Width %d\n"
" /Height %d\n"
" /ColorSpace %s\n"
" /Interpolate %s\n"
" /BitsPerComponent %d\n"
"%s"
" /Filter /DCTDecode\n",
info.width,
info.height,
colorspace,
surface_entry->interpolate ? "true" : "false",
info.bits_per_component,
smask_buf);
}
if (unlikely (status))
return status;
_cairo_output_stream_write (surface->output, mime_data, mime_data_length);
status = _cairo_pdf_surface_close_stream (surface);
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_emit_ccitt_image (cairo_pdf_surface_t *surface,
cairo_surface_t *source,
cairo_pdf_source_surface_entry_t *surface_entry,
cairo_bool_t test)
{
cairo_status_t status;
const unsigned char *ccitt_data;
unsigned long ccitt_data_len;
const unsigned char *ccitt_params_string;
unsigned long ccitt_params_string_len;
char *params, *p, *end;
cairo_ccitt_params_t ccitt_params;
char buf[300];
cairo_surface_get_mime_data (source, CAIRO_MIME_TYPE_CCITT_FAX,
&ccitt_data, &ccitt_data_len);
if (unlikely (source->status))
return source->status;
if (ccitt_data == NULL)
return CAIRO_INT_STATUS_UNSUPPORTED;
cairo_surface_get_mime_data (source, CAIRO_MIME_TYPE_CCITT_FAX_PARAMS,
&ccitt_params_string, &ccitt_params_string_len);
if (unlikely (source->status))
return source->status;
if (ccitt_params_string == NULL)
return CAIRO_INT_STATUS_UNSUPPORTED;
/* ensure params_string is null terminated */
params = malloc (ccitt_params_string_len + 1);
memcpy (params, ccitt_params_string, ccitt_params_string_len);
params[ccitt_params_string_len] = 0;
status = _cairo_tag_parse_ccitt_params (params, &ccitt_params);
if (unlikely(status))
return source->status;
free (params);
/* At this point we know emitting jbig2 will succeed. */
if (test)
return CAIRO_STATUS_SUCCESS;
p = buf;
*p = 0;
end = buf + sizeof(buf) - 1;
p += snprintf (p, end - p, "/Columns %d /Rows %d /K %d",
ccitt_params.columns,
ccitt_params.rows,
ccitt_params.k);
if (ccitt_params.end_of_line)
p += snprintf (p, end - p, " /EndOfLine true");
if (ccitt_params.encoded_byte_align)
p += snprintf (p, end - p, " /EncodedByteAlign true");
if (!ccitt_params.end_of_block)
p += snprintf (p, end - p, " /EndOfBlock false");
if (ccitt_params.black_is_1)
p += snprintf (p, end - p, " /BlackIs1 true");
if (ccitt_params.damaged_rows_before_error > 0) {
p += snprintf (p, end - p, " /DamagedRowsBeforeError %d",
ccitt_params.damaged_rows_before_error);
}
if (surface_entry->stencil_mask) {
status = _cairo_pdf_surface_open_stream (surface,
&surface_entry->surface_res,
FALSE,
" /Type /XObject\n"
" /Subtype /Image\n"
" /ImageMask true\n"
" /Width %d\n"
" /Height %d\n"
" /Interpolate %s\n"
" /BitsPerComponent 1\n"
" /Decode [1 0]\n"
" /Filter /CCITTFaxDecode\n"
" /DecodeParms << %s >> ",
ccitt_params.columns,
ccitt_params.rows,
surface_entry->interpolate ? "true" : "false",
buf);
} else {
status = _cairo_pdf_surface_open_stream (surface,
&surface_entry->surface_res,
FALSE,
" /Type /XObject\n"
" /Subtype /Image\n"
" /Width %d\n"
" /Height %d\n"
" /ColorSpace /DeviceGray\n"
" /BitsPerComponent 1\n"
" /Interpolate %s\n"
" /Filter /CCITTFaxDecode\n"
" /DecodeParms << %s >> ",
ccitt_params.columns,
ccitt_params.rows,
surface_entry->interpolate ? "true" : "false",
buf);
}
if (unlikely (status))
return status;
_cairo_output_stream_write (surface->output, ccitt_data, ccitt_data_len);
status = _cairo_pdf_surface_close_stream (surface);
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_emit_recording_surface (cairo_pdf_surface_t *surface,
cairo_pdf_source_surface_t *pdf_source)
{
cairo_rectangle_int_t old_surface_extents;
cairo_bool_t old_surface_bounded;
cairo_paginated_mode_t old_paginated_mode;
cairo_surface_clipper_t old_clipper;
cairo_bool_t old_in_xobject;
cairo_box_double_t bbox;
cairo_int_status_t status;
int alpha = 0;
cairo_surface_t *free_me = NULL;
cairo_surface_t *source;
const cairo_rectangle_int_t *extents;
cairo_bool_t is_subsurface;
cairo_bool_t transparency_group;
cairo_recording_surface_t *recording;
assert (pdf_source->type == CAIRO_PATTERN_TYPE_SURFACE);
if (pdf_source->hash_entry->bounded) {
extents = &pdf_source->hash_entry->extents;
} else {
extents = &pdf_source->hash_entry->required_extents;
}
is_subsurface = FALSE;
source = pdf_source->surface;
if (_cairo_surface_is_snapshot (source))
free_me = source = _cairo_surface_snapshot_get_target (source);
if (source->backend->type == CAIRO_SURFACE_TYPE_SUBSURFACE) {
cairo_surface_subsurface_t *sub = (cairo_surface_subsurface_t *) source;
source = sub->target;
extents = &sub->extents;
is_subsurface = TRUE;
}
assert (source->type == CAIRO_SURFACE_TYPE_RECORDING);
recording = (cairo_recording_surface_t *) source;
old_in_xobject = surface->in_xobject;
old_surface_extents = surface->surface_extents;
old_surface_bounded = surface->surface_bounded;
old_paginated_mode = surface->paginated_mode;
old_clipper = surface->clipper;
surface->surface_extents = *extents;
_cairo_surface_clipper_init (&surface->clipper,
_cairo_pdf_surface_clipper_intersect_clip_path);
_cairo_pdf_operators_reset (&surface->pdf_operators);
surface->in_xobject = TRUE;
surface->surface_extents = *extents;
surface->surface_bounded = TRUE;
/* Patterns are emitted after fallback images. The paginated mode
* needs to be set to _RENDER while the recording surface is replayed
* back to this surface.
*/
surface->paginated_mode = CAIRO_PAGINATED_MODE_RENDER;
_cairo_pdf_group_resources_clear (&surface->resources);
_get_bbox_from_extents (extents, &bbox);
/* We can optimize away the transparency group allowing the viewer
* to replay the group in place when:
* - ca/CA when painting this groups is 1.0 (need_transp_group is FALSE),
* - all operators are OVER, and
* - the recording contains only opaque and/or clear alpha.
*/
transparency_group = pdf_source->hash_entry->need_transp_group ||
!(pdf_source->hash_entry->operator == CAIRO_OPERATOR_OVER &&
_cairo_recording_surface_has_only_bilevel_alpha (recording) &&
_cairo_recording_surface_has_only_op_over (recording));
status = _cairo_pdf_surface_open_content_stream (surface,
&bbox,
&pdf_source->hash_entry->surface_res,
TRUE,
transparency_group);
if (unlikely (status))
goto err;
/* Reset gstate */
_cairo_output_stream_printf (surface->output, "/gs0 gs\n");
if (source->content == CAIRO_CONTENT_COLOR) {
status = _cairo_pdf_surface_add_alpha (surface, 1.0, &alpha);
if (unlikely (status))
goto err;
_cairo_output_stream_printf (surface->output,
"q /a%d gs 0 0 0 rg %d %d %d %d re f Q\n",
alpha,
extents->x,
extents->y,
extents->width,
extents->height);
}
status = _cairo_recording_surface_replay_region (source,
is_subsurface ? extents : NULL,
&surface->base,
CAIRO_RECORDING_REGION_NATIVE);
assert (status != CAIRO_INT_STATUS_UNSUPPORTED);
if (unlikely (status))
goto err;
status = _cairo_pdf_surface_close_content_stream (surface, TRUE);
_cairo_surface_clipper_reset (&surface->clipper);
surface->clipper = old_clipper;
_cairo_pdf_operators_reset (&surface->pdf_operators);
surface->in_xobject = old_in_xobject;
surface->paginated_mode = old_paginated_mode;
surface->surface_extents = old_surface_extents;
surface->surface_bounded = old_surface_bounded;
err:
cairo_surface_destroy (free_me);
return status;
}
/**
* _cairo_pdf_surface_emit_surface:
* @surface: [in] the pdf surface
* @source: [in] #cairo_pdf_source_surface_t containing the surface to write
* @test: [in] if true, test what type of surface will be emitted.
* @is_image: [out] if @test is true, returns TRUE if the surface will be emitted
* as an Image XObject.
*
* If @test is FALSE, emit @src_surface as an XObject.
* If @test is TRUE, don't emit anything. Set @is_image based on the output that would be emitted.
**/
static cairo_int_status_t
_cairo_pdf_surface_emit_surface (cairo_pdf_surface_t *surface,
cairo_pdf_source_surface_t *source,
cairo_bool_t test,
cairo_bool_t *is_image)
{
cairo_image_surface_t *image;
void *image_extra;
cairo_int_status_t status;
/* Try all the supported mime types and recording type, falling through
* each option if unsupported */
if (source->type == CAIRO_PATTERN_TYPE_SURFACE) {
status = _cairo_pdf_surface_emit_jbig2_image (surface,
source->surface,
source->hash_entry,
test);
if (status != CAIRO_INT_STATUS_UNSUPPORTED) {
*is_image = TRUE;
return status;
}
status = _cairo_pdf_surface_emit_jpx_image (surface,
source->surface,
source->hash_entry,
test);
if (status != CAIRO_INT_STATUS_UNSUPPORTED) {
*is_image = TRUE;
return status;
}
status = _cairo_pdf_surface_emit_jpeg_image (surface,
source->surface,
source->hash_entry,
test);
if (status != CAIRO_INT_STATUS_UNSUPPORTED) {
*is_image = TRUE;
return status;
}
status = _cairo_pdf_surface_emit_ccitt_image (surface,
source->surface,
source->hash_entry,
test);
if (status != CAIRO_INT_STATUS_UNSUPPORTED) {
*is_image = TRUE;
return status;
}
if (source->surface->type == CAIRO_SURFACE_TYPE_RECORDING) {
if (test) {
*is_image = FALSE;
return CAIRO_INT_STATUS_SUCCESS;
} else {
return _cairo_pdf_surface_emit_recording_surface (surface, source);
}
}
}
/* The only option left is to emit as an image surface */
if (source->type == CAIRO_PATTERN_TYPE_SURFACE) {
status = _cairo_surface_acquire_source_image (source->surface, &image, &image_extra);
} else {
status = _cairo_pdf_surface_acquire_source_image_from_pattern (surface,
source->raster_pattern,
&image,
&image_extra);
}
if (unlikely (status))
return status;
if (test) {
*is_image = TRUE;
} else {
status = _cairo_pdf_surface_emit_image (surface,
image,
source->hash_entry);
}
if (source->type == CAIRO_PATTERN_TYPE_SURFACE) {
_cairo_surface_release_source_image (source->surface, image, image_extra);
} else {
_cairo_pdf_surface_release_source_image_from_pattern (surface,
source->raster_pattern,
image,
image_extra);
}
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_emit_surface_pattern (cairo_pdf_surface_t *surface,
cairo_pdf_pattern_t *pdf_pattern)
{
cairo_pattern_t *pattern = pdf_pattern->pattern;
cairo_int_status_t status;
cairo_matrix_t cairo_p2d, pdf_p2d;
cairo_extend_t extend = cairo_pattern_get_extend (pattern);
double xstep, ystep;
cairo_rectangle_int_t pattern_extents;
double x_offset;
double y_offset;
char draw_surface[50];
char draw_surface2[200];
cairo_box_double_t bbox;
cairo_matrix_t mat;
cairo_pdf_source_surface_entry_t *pdf_source;
cairo_rectangle_int_t op_extents;
assert (pattern->type == CAIRO_PATTERN_TYPE_SURFACE);
if (pattern->extend == CAIRO_EXTEND_PAD) {
status = _cairo_pdf_surface_add_padded_image_surface (surface,
pattern,
&pdf_pattern->extents,
&pdf_source,
&x_offset,
&y_offset,
&op_extents);
} else {
status = _cairo_pdf_surface_add_source_surface (surface,
NULL,
pattern,
pdf_pattern->operator,
pattern->filter,
FALSE, /* stencil mask */
FALSE, /* smask */
FALSE, /* need_transp_group */
&pdf_pattern->extents,
NULL, /* smask_res */
&pdf_source,
&x_offset,
&y_offset,
&op_extents);
}
if (unlikely (status))
return status;
pattern_extents = pdf_source->extents;
if (!pdf_source->bounded)
{
extend = CAIRO_EXTEND_NONE;
_cairo_rectangle_intersect (&pattern_extents, &op_extents);
}
switch (extend) {
case CAIRO_EXTEND_PAD:
case CAIRO_EXTEND_NONE:
{
/* In PS/PDF, (as far as I can tell), all patterns are
* repeating. So we support cairo's EXTEND_NONE semantics
* by setting the repeat step size to a size large enough
* to guarantee that no more than a single occurrence will
* be visible.
*
* First, map the surface extents into pattern space (since
* xstep and ystep are in pattern space). Then use an upper
* bound on the length of the diagonal of the pattern image
* and the surface as repeat size. This guarantees to never
* repeat visibly.
*/
double x1 = 0.0, y1 = 0.0;
double x2 = surface->surface_extents.width;
double y2 = surface->surface_extents.height;
_cairo_matrix_transform_bounding_box (&pattern->matrix,
&x1, &y1, &x2, &y2,
NULL);
/* Rather than computing precise bounds of the union, just
* add the surface extents unconditionally. We only
* required an answer that's large enough, we don't really
* care if it's not as tight as possible.*/
xstep = ystep = ceil ((x2 - x1) + (y2 - y1) +
pattern_extents.width + pattern_extents.height);
}
break;
case CAIRO_EXTEND_REPEAT:
xstep = pattern_extents.width;
ystep = pattern_extents.height;
break;
case CAIRO_EXTEND_REFLECT:
pattern_extents.width *= 2;
pattern_extents.height *= 2;
xstep = pattern_extents.width;
ystep = pattern_extents.height;
break;
/* All the rest (if any) should have been analyzed away, so this
* case should be unreachable. */
default:
ASSERT_NOT_REACHED;
xstep = 0;
ystep = 0;
}
/* At this point, (that is, within the surface backend interface),
* the pattern's matrix maps from cairo's device space to cairo's
* pattern space, (both with their origin at the upper-left, and
* cairo's pattern space of size width,height).
*
* Then, we must emit a PDF pattern object that maps from its own
* pattern space, (which has a size that we establish in the BBox
* dictionary entry), to the PDF page's *initial* space, (which
* does not benefit from the Y-axis flipping matrix that we emit
* on each page). So the PDF patterns matrix maps from a
* (width,height) pattern space to a device space with the origin
* in the lower-left corner.
*
* So to handle all of that, we start with an identity matrix for
* the PDF pattern to device matrix. We translate it up by the
* image height then flip it in the Y direction, (moving us from
* the PDF origin to cairo's origin). We then multiply in the
* inverse of the cairo pattern matrix, (since it maps from device
* to pattern, while we're setting up pattern to device). Finally,
* we translate back down by the image height and flip again to
* end up at the lower-left origin that PDF expects.
*
* Additionally, within the stream that paints the pattern itself,
* we are using a PDF image object that has a size of (1,1) so we
* have to scale it up by the image width and height to fill our
* pattern cell.
*/
cairo_p2d = pattern->matrix;
status = cairo_matrix_invert (&cairo_p2d);
/* cairo_pattern_set_matrix ensures the matrix is invertible */
assert (status == CAIRO_INT_STATUS_SUCCESS);
if (pdf_pattern->inverted_y_axis)
cairo_matrix_init (&mat, 1, 0, 0, 1, 0, 0);
else
cairo_matrix_init (&mat, 1, 0, 0, -1, 0, surface->height);
cairo_matrix_multiply (&pdf_p2d, &cairo_p2d, &mat);
cairo_matrix_translate (&pdf_p2d, x_offset, y_offset);
if (pdf_source->emit_image) {
cairo_matrix_translate (&pdf_p2d, 0.0, pdf_source->extents.height);
cairo_matrix_scale (&pdf_p2d, 1.0, -1.0);
}
_get_bbox_from_extents (&pattern_extents, &bbox);
_cairo_pdf_surface_update_object (surface, pdf_pattern->pattern_res);
status = _cairo_pdf_surface_open_stream (surface,
&pdf_pattern->pattern_res,
FALSE,
" /PatternType 1\n"
" /BBox [ %f %f %f %f ]\n"
" /XStep %f\n"
" /YStep %f\n"
" /TilingType 1\n"
" /PaintType 1\n"
" /Matrix [ %f %f %f %f %f %f ]\n"
" /Resources << /XObject << /x%d %d 0 R >> >>\n",
bbox.p1.x, bbox.p1.y, bbox.p2.x, bbox.p2.y,
xstep, ystep,
pdf_p2d.xx, pdf_p2d.yx,
pdf_p2d.xy, pdf_p2d.yy,
pdf_p2d.x0, pdf_p2d.y0,
pdf_source->surface_res.id,
pdf_source->surface_res.id);
if (unlikely (status))
return status;
if (pdf_source->emit_image) {
snprintf(draw_surface,
sizeof (draw_surface),
"q %d 0 0 %d 0 0 cm /x%d Do Q",
pdf_source->extents.width,
pdf_source->extents.height,
pdf_source->surface_res.id);
} else {
snprintf(draw_surface,
sizeof (draw_surface),
"/x%d Do",
pdf_source->surface_res.id);
}
if (extend == CAIRO_EXTEND_REFLECT) {
cairo_rectangle_int_t p_extents = pdf_source->extents;
snprintf(draw_surface2,
sizeof (draw_surface2),
"%d %d %d %d re W n %s",
p_extents.x, p_extents.y,
p_extents.width, p_extents.height,
draw_surface);
_cairo_output_stream_printf (surface->output, "q %s Q\n", draw_surface2);
cairo_matrix_init_translate (&mat, p_extents.x, p_extents.y);
cairo_matrix_scale (&mat, -1, 1);
cairo_matrix_translate (&mat, -2*p_extents.width, 0);
cairo_matrix_translate (&mat, -p_extents.x, -p_extents.y);
_cairo_output_stream_printf (surface->output, "q ");
_cairo_output_stream_print_matrix (surface->output, &mat);
_cairo_output_stream_printf (surface->output, " cm %s Q\n", draw_surface2);
cairo_matrix_init_translate (&mat, p_extents.x, p_extents.y);
cairo_matrix_scale (&mat, 1, -1);
cairo_matrix_translate (&mat, 0, -2*p_extents.height);
cairo_matrix_translate (&mat, -p_extents.x, -p_extents.y);
_cairo_output_stream_printf (surface->output, "q ");
_cairo_output_stream_print_matrix (surface->output, &mat);
_cairo_output_stream_printf (surface->output, " cm %s Q\n", draw_surface2);
cairo_matrix_init_translate (&mat, p_extents.x, p_extents.y);
cairo_matrix_scale (&mat, -1, -1);
cairo_matrix_translate (&mat, -2*p_extents.width, -2*p_extents.height);
cairo_matrix_translate (&mat, -p_extents.x, -p_extents.y);
_cairo_output_stream_printf (surface->output, "q ");
_cairo_output_stream_print_matrix (surface->output, &mat);
_cairo_output_stream_printf (surface->output, " cm %s Q\n", draw_surface2);
} else {
_cairo_output_stream_printf (surface->output,
" %s \n",
draw_surface);
}
status = _cairo_pdf_surface_close_stream (surface);
if (unlikely (status))
return status;
return _cairo_output_stream_get_status (surface->output);
}
typedef struct _cairo_pdf_color_stop {
double offset;
double color[4];
cairo_pdf_resource_t resource;
} cairo_pdf_color_stop_t;
static cairo_int_status_t
cairo_pdf_surface_emit_rgb_linear_function (cairo_pdf_surface_t *surface,
cairo_pdf_color_stop_t *stop1,
cairo_pdf_color_stop_t *stop2,
cairo_pdf_resource_t *function)
{
int num_elems, i;
cairo_pdf_rgb_linear_function_t elem;
cairo_pdf_resource_t res;
cairo_int_status_t status;
num_elems = _cairo_array_num_elements (&surface->rgb_linear_functions);
for (i = 0; i < num_elems; i++) {
_cairo_array_copy_element (&surface->rgb_linear_functions, i, &elem);
if (memcmp (&elem.color1[0], &stop1->color[0], sizeof (double)*3) != 0)
continue;
if (memcmp (&elem.color2[0], &stop2->color[0], sizeof (double)*3) != 0)
continue;
*function = elem.resource;
return CAIRO_STATUS_SUCCESS;
}
res = _cairo_pdf_surface_new_object (surface);
if (res.id == 0)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /FunctionType 2\n"
" /Domain [ 0 1 ]\n"
" /C0 [ %f %f %f ]\n"
" /C1 [ %f %f %f ]\n"
" /N 1\n"
">>\n"
"endobj\n",
res.id,
stop1->color[0],
stop1->color[1],
stop1->color[2],
stop2->color[0],
stop2->color[1],
stop2->color[2]);
elem.resource = res;
memcpy (&elem.color1[0], &stop1->color[0], sizeof (double)*3);
memcpy (&elem.color2[0], &stop2->color[0], sizeof (double)*3);
status = _cairo_array_append (&surface->rgb_linear_functions, &elem);
*function = res;
return status;
}
static cairo_int_status_t
cairo_pdf_surface_emit_alpha_linear_function (cairo_pdf_surface_t *surface,
cairo_pdf_color_stop_t *stop1,
cairo_pdf_color_stop_t *stop2,
cairo_pdf_resource_t *function)
{
int num_elems, i;
cairo_pdf_alpha_linear_function_t elem;
cairo_pdf_resource_t res;
cairo_int_status_t status;
num_elems = _cairo_array_num_elements (&surface->alpha_linear_functions);
for (i = 0; i < num_elems; i++) {
_cairo_array_copy_element (&surface->alpha_linear_functions, i, &elem);
if (elem.alpha1 != stop1->color[3])
continue;
if (elem.alpha2 != stop2->color[3])
continue;
*function = elem.resource;
return CAIRO_STATUS_SUCCESS;
}
res = _cairo_pdf_surface_new_object (surface);
if (res.id == 0)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /FunctionType 2\n"
" /Domain [ 0 1 ]\n"
" /C0 [ %f ]\n"
" /C1 [ %f ]\n"
" /N 1\n"
">>\n"
"endobj\n",
res.id,
stop1->color[3],
stop2->color[3]);
elem.resource = res;
elem.alpha1 = stop1->color[3];
elem.alpha2 = stop2->color[3];
status = _cairo_array_append (&surface->alpha_linear_functions, &elem);
*function = res;
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_emit_stitched_colorgradient (cairo_pdf_surface_t *surface,
unsigned int n_stops,
cairo_pdf_color_stop_t *stops,
cairo_bool_t is_alpha,
cairo_pdf_resource_t *function)
{
cairo_pdf_resource_t res;
unsigned int i;
cairo_int_status_t status;
/* emit linear gradients between pairs of subsequent stops... */
for (i = 0; i < n_stops-1; i++) {
if (is_alpha) {
status = cairo_pdf_surface_emit_alpha_linear_function (surface,
&stops[i],
&stops[i+1],
&stops[i].resource);
if (unlikely (status))
return status;
} else {
status = cairo_pdf_surface_emit_rgb_linear_function (surface,
&stops[i],
&stops[i+1],
&stops[i].resource);
if (unlikely (status))
return status;
}
}
/* ... and stitch them together */
res = _cairo_pdf_surface_new_object (surface);
if (res.id == 0)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /FunctionType 3\n"
" /Domain [ %f %f ]\n",
res.id,
stops[0].offset,
stops[n_stops - 1].offset);
_cairo_output_stream_printf (surface->output,
" /Functions [ ");
for (i = 0; i < n_stops-1; i++)
_cairo_output_stream_printf (surface->output,
"%d 0 R ", stops[i].resource.id);
_cairo_output_stream_printf (surface->output,
"]\n");
_cairo_output_stream_printf (surface->output,
" /Bounds [ ");
for (i = 1; i < n_stops-1; i++)
_cairo_output_stream_printf (surface->output,
"%f ", stops[i].offset);
_cairo_output_stream_printf (surface->output,
"]\n");
_cairo_output_stream_printf (surface->output,
" /Encode [ ");
for (i = 1; i < n_stops; i++)
_cairo_output_stream_printf (surface->output,
"0 1 ");
_cairo_output_stream_printf (surface->output,
"]\n");
_cairo_output_stream_printf (surface->output,
">>\n"
"endobj\n");
*function = res;
return _cairo_output_stream_get_status (surface->output);
}
static void
calc_gradient_color (cairo_pdf_color_stop_t *new_stop,
cairo_pdf_color_stop_t *stop1,
cairo_pdf_color_stop_t *stop2)
{
int i;
double offset = stop1->offset / (stop1->offset + 1.0 - stop2->offset);
for (i = 0; i < 4; i++)
new_stop->color[i] = stop1->color[i] + offset*(stop2->color[i] - stop1->color[i]);
}
#define COLOR_STOP_EPSILON 1e-6
static cairo_int_status_t
_cairo_pdf_surface_emit_pattern_stops (cairo_pdf_surface_t *surface,
cairo_gradient_pattern_t *pattern,
cairo_pdf_resource_t *color_function,
cairo_pdf_resource_t *alpha_function)
{
cairo_pdf_color_stop_t *allstops, *stops;
unsigned int n_stops;
unsigned int i;
cairo_bool_t emit_alpha = FALSE;
cairo_int_status_t status;
color_function->id = 0;
alpha_function->id = 0;
allstops = _cairo_malloc_ab ((pattern->n_stops + 2), sizeof (cairo_pdf_color_stop_t));
if (unlikely (allstops == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
stops = &allstops[1];
n_stops = pattern->n_stops;
for (i = 0; i < n_stops; i++) {
stops[i].color[0] = pattern->stops[i].color.red;
stops[i].color[1] = pattern->stops[i].color.green;
stops[i].color[2] = pattern->stops[i].color.blue;
stops[i].color[3] = pattern->stops[i].color.alpha;
if (!CAIRO_ALPHA_IS_OPAQUE (stops[i].color[3]))
emit_alpha = TRUE;
stops[i].offset = pattern->stops[i].offset;
}
if (pattern->base.extend == CAIRO_EXTEND_REPEAT ||
pattern->base.extend == CAIRO_EXTEND_REFLECT) {
if (stops[0].offset > COLOR_STOP_EPSILON) {
if (pattern->base.extend == CAIRO_EXTEND_REFLECT)
memcpy (allstops, stops, sizeof (cairo_pdf_color_stop_t));
else
calc_gradient_color (&allstops[0], &stops[0], &stops[n_stops-1]);
stops = allstops;
n_stops++;
}
stops[0].offset = 0.0;
if (stops[n_stops-1].offset < 1.0 - COLOR_STOP_EPSILON) {
if (pattern->base.extend == CAIRO_EXTEND_REFLECT) {
memcpy (&stops[n_stops],
&stops[n_stops - 1],
sizeof (cairo_pdf_color_stop_t));
} else {
calc_gradient_color (&stops[n_stops], &stops[0], &stops[n_stops-1]);
}
n_stops++;
}
stops[n_stops-1].offset = 1.0;
}
if (stops[0].offset == stops[n_stops - 1].offset) {
/*
* The first and the last stops have the same offset, but we
* don't want a function with an empty domain, because that
* would provoke underdefined behaviour from rasterisers.
* This can only happen with EXTEND_PAD, because EXTEND_NONE
* is optimised into a clear pattern in cairo-gstate, and
* REFLECT/REPEAT are always transformed to have the first
* stop at t=0 and the last stop at t=1. Thus we want a step
* function going from the first color to the last one.
*
* This can be accomplished by stitching three functions:
* - a constant first color function,
* - a step from the first color to the last color (with empty domain)
* - a constant last color function
*/
cairo_pdf_color_stop_t pad_stops[4];
assert (pattern->base.extend == CAIRO_EXTEND_PAD);
pad_stops[0] = pad_stops[1] = stops[0];
pad_stops[2] = pad_stops[3] = stops[n_stops - 1];
pad_stops[0].offset = 0;
pad_stops[3].offset = 1;
status = _cairo_pdf_surface_emit_stitched_colorgradient (surface,
4,
pad_stops,
FALSE,
color_function);
if (unlikely (status))
goto BAIL;
if (emit_alpha) {
status = _cairo_pdf_surface_emit_stitched_colorgradient (surface,
4,
pad_stops,
TRUE,
alpha_function);
if (unlikely (status))
goto BAIL;
}
} else if (n_stops == 2) {
/* no need for stitched function */
status = cairo_pdf_surface_emit_rgb_linear_function (surface,
&stops[0],
&stops[n_stops - 1],
color_function);
if (unlikely (status))
goto BAIL;
if (emit_alpha) {
status = cairo_pdf_surface_emit_alpha_linear_function (surface,
&stops[0],
&stops[n_stops - 1],
alpha_function);
if (unlikely (status))
goto BAIL;
}
} else {
/* multiple stops: stitch. XXX possible optimization: regularly spaced
* stops do not require stitching. XXX */
status = _cairo_pdf_surface_emit_stitched_colorgradient (surface,
n_stops,
stops,
FALSE,
color_function);
if (unlikely (status))
goto BAIL;
if (emit_alpha) {
status = _cairo_pdf_surface_emit_stitched_colorgradient (surface,
n_stops,
stops,
TRUE,
alpha_function);
if (unlikely (status))
goto BAIL;
}
}
BAIL:
free (allstops);
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_emit_repeating_function (cairo_pdf_surface_t *surface,
cairo_gradient_pattern_t *pattern,
cairo_pdf_resource_t *function,
int begin,
int end)
{
cairo_pdf_resource_t res;
int i;
res = _cairo_pdf_surface_new_object (surface);
if (res.id == 0)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /FunctionType 3\n"
" /Domain [ %d %d ]\n",
res.id,
begin,
end);
_cairo_output_stream_printf (surface->output,
" /Functions [ ");
for (i = begin; i < end; i++)
_cairo_output_stream_printf (surface->output,
"%d 0 R ", function->id);
_cairo_output_stream_printf (surface->output,
"]\n");
_cairo_output_stream_printf (surface->output,
" /Bounds [ ");
for (i = begin + 1; i < end; i++)
_cairo_output_stream_printf (surface->output,
"%d ", i);
_cairo_output_stream_printf (surface->output,
"]\n");
_cairo_output_stream_printf (surface->output,
" /Encode [ ");
for (i = begin; i < end; i++) {
if ((i % 2) && pattern->base.extend == CAIRO_EXTEND_REFLECT) {
_cairo_output_stream_printf (surface->output,
"1 0 ");
} else {
_cairo_output_stream_printf (surface->output,
"0 1 ");
}
}
_cairo_output_stream_printf (surface->output,
"]\n");
_cairo_output_stream_printf (surface->output,
">>\n"
"endobj\n");
*function = res;
return _cairo_output_stream_get_status (surface->output);
}
static cairo_int_status_t
cairo_pdf_surface_emit_transparency_group (cairo_pdf_surface_t *surface,
cairo_pdf_pattern_t *pdf_pattern,
cairo_pdf_resource_t gstate_resource,
cairo_pdf_resource_t gradient_mask)
{
cairo_pdf_resource_t smask_resource;
cairo_int_status_t status;
char buf[100];
double x1, y1, x2, y2;
if (pdf_pattern->is_shading) {
snprintf(buf, sizeof(buf),
" /Shading\n"
" << /sh%d %d 0 R >>\n",
gradient_mask.id,
gradient_mask.id);
} else {
snprintf(buf, sizeof(buf),
" /Pattern\n"
" << /p%d %d 0 R >>\n",
gradient_mask.id,
gradient_mask.id);
}
if (pdf_pattern->is_shading) {
cairo_box_t box;
/* When emitting a shading operator we are in cairo pattern
* coordinates. _cairo_pdf_surface_paint_gradient has set the
* ctm to the pattern matrix (including the conversion from
* pdf to cairo coordinates) */
_cairo_box_from_rectangle (&box, &pdf_pattern->extents);
_cairo_box_to_doubles (&box, &x1, &y1, &x2, &y2);
_cairo_matrix_transform_bounding_box (&pdf_pattern->pattern->matrix, &x1, &y1, &x2, &y2, NULL);
} else {
cairo_box_double_t box;
/* When emitting a shading pattern we are in pdf page
* coordinates. The color and alpha shading patterns painted
* in the XObject below contain the cairo pattern to pdf page
* matrix in the /Matrix entry of the pattern. */
_get_bbox_from_extents (&pdf_pattern->extents, &box);
x1 = box.p1.x;
y1 = box.p1.y;
x2 = box.p2.x;
y2 = box.p2.y;
}
status = _cairo_pdf_surface_open_stream (surface,
NULL,
surface->compress_streams,
" /Type /XObject\n"
" /Subtype /Form\n"
" /FormType 1\n"
" /BBox [ %f %f %f %f ]\n"
" /Resources\n"
" << /ExtGState\n"
" << /a0 << /ca 1 /CA 1 >>"
" >>\n"
"%s"
" >>\n"
" /Group\n"
" << /Type /Group\n"
" /S /Transparency\n"
" /I true\n"
" /CS /DeviceGray\n"
" >>\n",
x1,y1,x2,y2,
buf);
if (unlikely (status))
return status;
if (pdf_pattern->is_shading) {
_cairo_output_stream_printf (surface->output,
"/a0 gs /sh%d sh\n",
gradient_mask.id);
} else {
_cairo_output_stream_printf (surface->output,
"q\n"
"/a0 gs\n"
"/Pattern cs /p%d scn\n"
"0 0 %f %f re\n"
"f\n"
"Q\n",
gradient_mask.id,
surface->width,
surface->height);
}
status = _cairo_pdf_surface_close_stream (surface);
if (unlikely (status))
return status;
smask_resource = _cairo_pdf_surface_new_object (surface);
if (smask_resource.id == 0)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Type /Mask\n"
" /S /Luminosity\n"
" /G %d 0 R\n"
">>\n"
"endobj\n",
smask_resource.id,
surface->pdf_stream.self.id);
/* Create GState which uses the transparency group as an SMask. */
_cairo_pdf_surface_update_object (surface, gstate_resource);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Type /ExtGState\n"
" /SMask %d 0 R\n"
" /ca 1\n"
" /CA 1\n"
" /AIS false\n"
">>\n"
"endobj\n",
gstate_resource.id,
smask_resource.id);
return _cairo_output_stream_get_status (surface->output);
}
static void
_cairo_pdf_surface_output_gradient (cairo_pdf_surface_t *surface,
const cairo_pdf_pattern_t *pdf_pattern,
cairo_pdf_resource_t pattern_resource,
const cairo_matrix_t *pat_to_pdf,
const cairo_circle_double_t*start,
const cairo_circle_double_t*end,
const double *domain,
const char *colorspace,
cairo_pdf_resource_t color_function)
{
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n",
pattern_resource.id);
if (!pdf_pattern->is_shading) {
_cairo_output_stream_printf (surface->output,
"<< /Type /Pattern\n"
" /PatternType 2\n"
" /Matrix [ ");
_cairo_output_stream_print_matrix (surface->output, pat_to_pdf);
_cairo_output_stream_printf (surface->output,
" ]\n"
" /Shading\n");
}
if (pdf_pattern->pattern->type == CAIRO_PATTERN_TYPE_LINEAR) {
_cairo_output_stream_printf (surface->output,
" << /ShadingType 2\n"
" /ColorSpace %s\n"
" /Coords [ %f %f %f %f ]\n",
colorspace,
start->center.x, start->center.y,
end->center.x, end->center.y);
} else {
_cairo_output_stream_printf (surface->output,
" << /ShadingType 3\n"
" /ColorSpace %s\n"
" /Coords [ %f %f %f %f %f %f ]\n",
colorspace,
start->center.x, start->center.y,
MAX (start->radius, 0),
end->center.x, end->center.y,
MAX (end->radius, 0));
}
_cairo_output_stream_printf (surface->output,
" /Domain [ %f %f ]\n",
domain[0], domain[1]);
if (pdf_pattern->pattern->extend != CAIRO_EXTEND_NONE) {
_cairo_output_stream_printf (surface->output,
" /Extend [ true true ]\n");
} else {
_cairo_output_stream_printf (surface->output,
" /Extend [ false false ]\n");
}
_cairo_output_stream_printf (surface->output,
" /Function %d 0 R\n"
" >>\n",
color_function.id);
if (!pdf_pattern->is_shading) {
_cairo_output_stream_printf (surface->output,
">>\n");
}
_cairo_output_stream_printf (surface->output,
"endobj\n");
}
static cairo_int_status_t
_cairo_pdf_surface_emit_gradient (cairo_pdf_surface_t *surface,
cairo_pdf_pattern_t *pdf_pattern)
{
cairo_gradient_pattern_t *pattern = (cairo_gradient_pattern_t *) pdf_pattern->pattern;
cairo_pdf_resource_t color_function, alpha_function;
cairo_matrix_t pat_to_pdf;
cairo_circle_double_t start, end;
double domain[2];
cairo_int_status_t status;
cairo_matrix_t mat;
assert (pattern->n_stops != 0);
status = _cairo_pdf_surface_emit_pattern_stops (surface,
pattern,
&color_function,
&alpha_function);
if (unlikely (status))
return status;
pat_to_pdf = pattern->base.matrix;
status = cairo_matrix_invert (&pat_to_pdf);
/* cairo_pattern_set_matrix ensures the matrix is invertible */
assert (status == CAIRO_INT_STATUS_SUCCESS);
if (pdf_pattern->inverted_y_axis)
cairo_matrix_init (&mat, 1, 0, 0, 1, 0, 0);
else
cairo_matrix_init (&mat, 1, 0, 0, -1, 0, surface->height);
cairo_matrix_multiply (&pat_to_pdf, &pat_to_pdf, &mat);
if (pattern->base.extend == CAIRO_EXTEND_REPEAT ||
pattern->base.extend == CAIRO_EXTEND_REFLECT)
{
double bounds_x1, bounds_x2, bounds_y1, bounds_y2;
double x_scale, y_scale, tolerance;
/* TODO: use tighter extents */
bounds_x1 = 0;
bounds_y1 = 0;
bounds_x2 = surface->width;
bounds_y2 = surface->height;
_cairo_matrix_transform_bounding_box (&pattern->base.matrix,
&bounds_x1, &bounds_y1,
&bounds_x2, &bounds_y2,
NULL);
x_scale = surface->base.x_resolution / surface->base.x_fallback_resolution;
y_scale = surface->base.y_resolution / surface->base.y_fallback_resolution;
tolerance = fabs (_cairo_matrix_compute_determinant (&pattern->base.matrix));
tolerance /= _cairo_matrix_transformed_circle_major_axis (&pattern->base.matrix, 1);
tolerance *= MIN (x_scale, y_scale);
_cairo_gradient_pattern_box_to_parameter (pattern,
bounds_x1, bounds_y1,
bounds_x2, bounds_y2,
tolerance, domain);
} else if (pattern->stops[0].offset == pattern->stops[pattern->n_stops - 1].offset) {
/*
* If the first and the last stop offset are the same, then
* the color function is a step function.
* _cairo_ps_surface_emit_pattern_stops emits it as a stitched
* function no matter how many stops the pattern has. The
* domain of the stitched function will be [0 1] in this case.
*
* This is done to avoid emitting degenerate gradients for
* EXTEND_PAD patterns having a step color function.
*/
domain[0] = 0.0;
domain[1] = 1.0;
assert (pattern->base.extend == CAIRO_EXTEND_PAD);
} else {
domain[0] = pattern->stops[0].offset;
domain[1] = pattern->stops[pattern->n_stops - 1].offset;
}
/* PDF requires the first and last stop to be the same as the
* extreme coordinates. For repeating patterns this moves the
* extreme coordinates out to the begin/end of the repeating
* function. For non repeating patterns this may move the extreme
* coordinates in if there are not stops at offset 0 and 1. */
_cairo_gradient_pattern_interpolate (pattern, domain[0], &start);
_cairo_gradient_pattern_interpolate (pattern, domain[1], &end);
if (pattern->base.extend == CAIRO_EXTEND_REPEAT ||
pattern->base.extend == CAIRO_EXTEND_REFLECT)
{
int repeat_begin, repeat_end;
repeat_begin = floor (domain[0]);
repeat_end = ceil (domain[1]);
status = _cairo_pdf_surface_emit_repeating_function (surface,
pattern,
&color_function,
repeat_begin,
repeat_end);
if (unlikely (status))
return status;
if (alpha_function.id != 0) {
status = _cairo_pdf_surface_emit_repeating_function (surface,
pattern,
&alpha_function,
repeat_begin,
repeat_end);
if (unlikely (status))
return status;
}
} else if (pattern->n_stops <= 2) {
/* For EXTEND_NONE and EXTEND_PAD if there are only two stops a
* Type 2 function is used by itself without a stitching
* function. Type 2 functions always have the domain [0 1] */
domain[0] = 0.0;
domain[1] = 1.0;
}
_cairo_pdf_surface_update_object (surface, pdf_pattern->pattern_res);
_cairo_pdf_surface_output_gradient (surface, pdf_pattern,
pdf_pattern->pattern_res,
&pat_to_pdf, &start, &end, domain,
"/DeviceRGB", color_function);
if (alpha_function.id != 0) {
cairo_pdf_resource_t mask_resource;
assert (pdf_pattern->gstate_res.id != 0);
/* Create pattern for SMask. */
mask_resource = _cairo_pdf_surface_new_object (surface);
if (mask_resource.id == 0)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_cairo_pdf_surface_output_gradient (surface, pdf_pattern,
mask_resource,
&pat_to_pdf, &start, &end, domain,
"/DeviceGray", alpha_function);
status = cairo_pdf_surface_emit_transparency_group (surface,
pdf_pattern,
pdf_pattern->gstate_res,
mask_resource);
if (unlikely (status))
return status;
}
return _cairo_output_stream_get_status (surface->output);
}
static cairo_int_status_t
_cairo_pdf_surface_emit_mesh_pattern (cairo_pdf_surface_t *surface,
cairo_pdf_pattern_t *pdf_pattern)
{
cairo_matrix_t pat_to_pdf;
cairo_int_status_t status;
cairo_pattern_t *pattern = pdf_pattern->pattern;
cairo_pdf_shading_t shading;
int i;
cairo_pdf_resource_t res;
cairo_matrix_t mat;
pat_to_pdf = pattern->matrix;
status = cairo_matrix_invert (&pat_to_pdf);
/* cairo_pattern_set_matrix ensures the matrix is invertible */
assert (status == CAIRO_INT_STATUS_SUCCESS);
if (pdf_pattern->inverted_y_axis)
cairo_matrix_init (&mat, 1, 0, 0, 1, 0, 0);
else
cairo_matrix_init (&mat, 1, 0, 0, -1, 0, surface->height);
cairo_matrix_multiply (&pat_to_pdf, &pat_to_pdf, &mat);
status = _cairo_pdf_shading_init_color (&shading, (cairo_mesh_pattern_t *) pattern);
if (unlikely (status))
return status;
res = _cairo_pdf_surface_new_object (surface);
if (unlikely (res.id == 0))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /ShadingType %d\n"
" /ColorSpace /DeviceRGB\n"
" /BitsPerCoordinate %d\n"
" /BitsPerComponent %d\n"
" /BitsPerFlag %d\n"
" /Decode [",
res.id,
shading.shading_type,
shading.bits_per_coordinate,
shading.bits_per_component,
shading.bits_per_flag);
for (i = 0; i < shading.decode_array_length; i++)
_cairo_output_stream_printf (surface->output, "%f ", shading.decode_array[i]);
_cairo_output_stream_printf (surface->output,
"]\n"
" /Length %ld\n"
">>\n"
"stream\n",
shading.data_length);
_cairo_output_stream_write (surface->output, shading.data, shading.data_length);
_cairo_output_stream_printf (surface->output,
"\nendstream\n"
"endobj\n");
_cairo_pdf_shading_fini (&shading);
_cairo_pdf_surface_update_object (surface, pdf_pattern->pattern_res);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Type /Pattern\n"
" /PatternType 2\n"
" /Matrix [ ",
pdf_pattern->pattern_res.id);
_cairo_output_stream_print_matrix (surface->output, &pat_to_pdf);
_cairo_output_stream_printf (surface->output,
" ]\n"
" /Shading %d 0 R\n"
">>\n"
"endobj\n",
res.id);
if (pdf_pattern->gstate_res.id != 0) {
cairo_pdf_resource_t mask_resource;
/* Create pattern for SMask. */
res = _cairo_pdf_surface_new_object (surface);
if (unlikely (res.id == 0))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
status = _cairo_pdf_shading_init_alpha (&shading, (cairo_mesh_pattern_t *) pattern);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /ShadingType %d\n"
" /ColorSpace /DeviceGray\n"
" /BitsPerCoordinate %d\n"
" /BitsPerComponent %d\n"
" /BitsPerFlag %d\n"
" /Decode [",
res.id,
shading.shading_type,
shading.bits_per_coordinate,
shading.bits_per_component,
shading.bits_per_flag);
for (i = 0; i < shading.decode_array_length; i++)
_cairo_output_stream_printf (surface->output, "%f ", shading.decode_array[i]);
_cairo_output_stream_printf (surface->output,
"]\n"
" /Length %ld\n"
">>\n"
"stream\n",
shading.data_length);
_cairo_output_stream_write (surface->output, shading.data, shading.data_length);
_cairo_output_stream_printf (surface->output,
"\nendstream\n"
"endobj\n");
_cairo_pdf_shading_fini (&shading);
mask_resource = _cairo_pdf_surface_new_object (surface);
if (unlikely (mask_resource.id == 0))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Type /Pattern\n"
" /PatternType 2\n"
" /Matrix [ ",
mask_resource.id);
_cairo_output_stream_print_matrix (surface->output, &pat_to_pdf);
_cairo_output_stream_printf (surface->output,
" ]\n"
" /Shading %d 0 R\n"
">>\n"
"endobj\n",
res.id);
status = cairo_pdf_surface_emit_transparency_group (surface,
pdf_pattern,
pdf_pattern->gstate_res,
mask_resource);
if (unlikely (status))
return status;
}
return _cairo_output_stream_get_status (surface->output);
}
static cairo_int_status_t
_cairo_pdf_surface_emit_pattern (cairo_pdf_surface_t *surface, cairo_pdf_pattern_t *pdf_pattern)
{
cairo_int_status_t status;
switch (pdf_pattern->pattern->type) {
case CAIRO_PATTERN_TYPE_SOLID:
ASSERT_NOT_REACHED;
status = _cairo_error (CAIRO_STATUS_PATTERN_TYPE_MISMATCH);
break;
case CAIRO_PATTERN_TYPE_SURFACE:
case CAIRO_PATTERN_TYPE_RASTER_SOURCE:
status = _cairo_pdf_surface_emit_surface_pattern (surface, pdf_pattern);
break;
case CAIRO_PATTERN_TYPE_LINEAR:
case CAIRO_PATTERN_TYPE_RADIAL:
status = _cairo_pdf_surface_emit_gradient (surface, pdf_pattern);
break;
case CAIRO_PATTERN_TYPE_MESH:
status = _cairo_pdf_surface_emit_mesh_pattern (surface, pdf_pattern);
break;
default:
ASSERT_NOT_REACHED;
status = _cairo_error (CAIRO_STATUS_PATTERN_TYPE_MISMATCH);
break;
}
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_paint_surface_pattern (cairo_pdf_surface_t *surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_rectangle_int_t *extents,
double alpha,
cairo_pdf_resource_t *smask_res,
cairo_bool_t stencil_mask)
{
cairo_matrix_t cairo_p2d, pdf_p2d;
cairo_int_status_t status;
int alpha_id;
double x_offset;
double y_offset;
cairo_pdf_source_surface_entry_t *pdf_source;
if (source->extend == CAIRO_EXTEND_PAD &&
!(source->type == CAIRO_PATTERN_TYPE_SURFACE &&
((cairo_surface_pattern_t *)source)->surface->type == CAIRO_SURFACE_TYPE_RECORDING))
{
status = _cairo_pdf_surface_add_padded_image_surface (surface,
source,
extents,
&pdf_source,
&x_offset,
&y_offset,
NULL);
} else {
status = _cairo_pdf_surface_add_source_surface (surface,
NULL,
source,
op,
source->filter,
stencil_mask,
FALSE, /* smask */
alpha != 1.0, /* need_transp_group */
extents,
smask_res,
&pdf_source,
&x_offset,
&y_offset,
NULL);
}
if (unlikely (status))
return status;
cairo_p2d = source->matrix;
status = cairo_matrix_invert (&cairo_p2d);
/* cairo_pattern_set_matrix ensures the matrix is invertible */
assert (status == CAIRO_INT_STATUS_SUCCESS);
pdf_p2d = surface->cairo_to_pdf;
cairo_matrix_multiply (&pdf_p2d, &cairo_p2d, &pdf_p2d);
cairo_matrix_translate (&pdf_p2d, x_offset, y_offset);
if (pdf_source->emit_image) {
int width, height;
if (pdf_source->bounded) {
width = pdf_source->extents.width;
height = pdf_source->extents.height;
} else {
/* We can't scale an image to an unbounded surface size so just set the size to 1 */
width = 1;
height = 1;
}
cairo_matrix_translate (&pdf_p2d, 0.0, height);
cairo_matrix_scale (&pdf_p2d, 1.0, -1.0);
cairo_matrix_scale (&pdf_p2d, width, height);
}
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (unlikely (status))
return status;
if (! _cairo_matrix_is_identity (&pdf_p2d)) {
_cairo_output_stream_print_matrix (surface->output, &pdf_p2d);
_cairo_output_stream_printf (surface->output, " cm\n");
}
status = _cairo_pdf_surface_add_alpha (surface, alpha, &alpha_id);
if (unlikely (status))
return status;
if (stencil_mask) {
_cairo_output_stream_printf (surface->output,
"/x%d Do\n",
pdf_source->surface_res.id);
} else {
_cairo_output_stream_printf (surface->output,
"/a%d gs /x%d Do\n",
alpha_id,
pdf_source->surface_res.id);
}
return _cairo_pdf_surface_add_xobject (surface, pdf_source->surface_res);
}
static cairo_int_status_t
_cairo_pdf_surface_paint_gradient (cairo_pdf_surface_t *surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_rectangle_int_t *extents,
double alpha)
{
cairo_pdf_resource_t shading_res, gstate_res;
cairo_matrix_t pat_to_pdf;
cairo_int_status_t status;
int alpha_id;
status = _cairo_pdf_surface_add_pdf_shading (surface, source,
op, extents,
&shading_res, &gstate_res);
if (unlikely (status == CAIRO_INT_STATUS_NOTHING_TO_DO))
return CAIRO_INT_STATUS_SUCCESS;
if (unlikely (status))
return status;
pat_to_pdf = source->matrix;
status = cairo_matrix_invert (&pat_to_pdf);
/* cairo_pattern_set_matrix ensures the matrix is invertible */
assert (status == CAIRO_INT_STATUS_SUCCESS);
cairo_matrix_multiply (&pat_to_pdf, &pat_to_pdf, &surface->cairo_to_pdf);
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (unlikely (status))
return status;
if (! _cairo_matrix_is_identity (&pat_to_pdf)) {
_cairo_output_stream_print_matrix (surface->output, &pat_to_pdf);
_cairo_output_stream_printf (surface->output, " cm\n");
}
status = _cairo_pdf_surface_add_shading (surface, shading_res);
if (unlikely (status))
return status;
if (gstate_res.id != 0) {
status = _cairo_pdf_surface_add_smask (surface, gstate_res);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output,
"/s%d gs /sh%d sh\n",
gstate_res.id,
shading_res.id);
} else {
status = _cairo_pdf_surface_add_alpha (surface, alpha, &alpha_id);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output,
"/a%d gs /sh%d sh\n",
alpha_id,
shading_res.id);
}
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_paint_pattern (cairo_pdf_surface_t *surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_rectangle_int_t *extents,
double alpha,
cairo_bool_t mask)
{
switch (source->type) {
case CAIRO_PATTERN_TYPE_SURFACE:
case CAIRO_PATTERN_TYPE_RASTER_SOURCE:
return _cairo_pdf_surface_paint_surface_pattern (surface,
op,
source,
extents,
alpha,
NULL,
mask);
case CAIRO_PATTERN_TYPE_LINEAR:
case CAIRO_PATTERN_TYPE_RADIAL:
case CAIRO_PATTERN_TYPE_MESH:
return _cairo_pdf_surface_paint_gradient (surface,
op,
source,
extents,
alpha);
case CAIRO_PATTERN_TYPE_SOLID:
default:
ASSERT_NOT_REACHED;
return CAIRO_STATUS_SUCCESS;
}
}
static cairo_bool_t
_can_paint_pattern (const cairo_pattern_t *pattern)
{
switch (pattern->type) {
case CAIRO_PATTERN_TYPE_SOLID:
return FALSE;
case CAIRO_PATTERN_TYPE_SURFACE:
case CAIRO_PATTERN_TYPE_RASTER_SOURCE:
return (pattern->extend == CAIRO_EXTEND_NONE ||
pattern->extend == CAIRO_EXTEND_PAD);
case CAIRO_PATTERN_TYPE_LINEAR:
case CAIRO_PATTERN_TYPE_RADIAL:
return TRUE;
case CAIRO_PATTERN_TYPE_MESH:
return FALSE;
default:
ASSERT_NOT_REACHED;
return FALSE;
}
}
static cairo_int_status_t
_cairo_pdf_surface_select_operator (cairo_pdf_surface_t *surface,
cairo_operator_t op)
{
cairo_int_status_t status;
if (op == surface->current_operator)
return CAIRO_STATUS_SUCCESS;
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output,
"/b%d gs\n", op);
surface->current_operator = op;
_cairo_pdf_surface_add_operator (surface, op);
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_pdf_surface_select_pattern (cairo_pdf_surface_t *surface,
const cairo_pattern_t *pattern,
cairo_pdf_resource_t pattern_res,
cairo_bool_t is_stroke)
{
cairo_int_status_t status;
int alpha;
const cairo_color_t *solid_color = NULL;
if (pattern->type == CAIRO_PATTERN_TYPE_SOLID) {
const cairo_solid_pattern_t *solid = (const cairo_solid_pattern_t *) pattern;
solid_color = &solid->color;
}
if (solid_color != NULL) {
if (surface->current_pattern_is_solid_color == FALSE ||
surface->current_color_red != solid_color->red ||
surface->current_color_green != solid_color->green ||
surface->current_color_blue != solid_color->blue ||
surface->current_color_is_stroke != is_stroke)
{
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output,
"%f %f %f ",
solid_color->red,
solid_color->green,
solid_color->blue);
if (is_stroke)
_cairo_output_stream_printf (surface->output, "RG ");
else
_cairo_output_stream_printf (surface->output, "rg ");
surface->current_color_red = solid_color->red;
surface->current_color_green = solid_color->green;
surface->current_color_blue = solid_color->blue;
surface->current_color_is_stroke = is_stroke;
}
if (surface->current_pattern_is_solid_color == FALSE ||
surface->current_color_alpha != solid_color->alpha)
{
status = _cairo_pdf_surface_add_alpha (surface, solid_color->alpha, &alpha);
if (unlikely (status))
return status;
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output,
"/a%d gs\n",
alpha);
surface->current_color_alpha = solid_color->alpha;
}
surface->current_pattern_is_solid_color = TRUE;
} else {
status = _cairo_pdf_surface_add_alpha (surface, 1.0, &alpha);
if (unlikely (status))
return status;
status = _cairo_pdf_surface_add_pattern (surface, pattern_res);
if (unlikely (status))
return status;
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (unlikely (status))
return status;
/* fill-stroke calls select_pattern twice. Don't save if the
* gstate is already saved. */
if (!surface->select_pattern_gstate_saved)
_cairo_output_stream_printf (surface->output, "q ");
if (is_stroke) {
_cairo_output_stream_printf (surface->output,
"/Pattern CS /p%d SCN ",
pattern_res.id);
} else {
_cairo_output_stream_printf (surface->output,
"/Pattern cs /p%d scn ",
pattern_res.id);
}
_cairo_output_stream_printf (surface->output,
"/a%d gs\n",
alpha);
surface->select_pattern_gstate_saved = TRUE;
surface->current_pattern_is_solid_color = FALSE;
}
return _cairo_output_stream_get_status (surface->output);
}
static cairo_int_status_t
_cairo_pdf_surface_unselect_pattern (cairo_pdf_surface_t *surface)
{
cairo_int_status_t status;
if (surface->select_pattern_gstate_saved) {
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output, "Q\n");
_cairo_pdf_operators_reset (&surface->pdf_operators);
surface->current_pattern_is_solid_color = FALSE;
}
surface->select_pattern_gstate_saved = FALSE;
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_pdf_surface_show_page (void *abstract_surface)
{
cairo_pdf_surface_t *surface = abstract_surface;
cairo_int_status_t status;
status = _cairo_array_append (&surface->page_heights, &surface->height);
if (unlikely (status))
return status;
status = _cairo_array_append (&surface->page_labels, &surface->current_page_label);
if (unlikely (status))
return status;
surface->current_page_label = NULL;
status = _cairo_pdf_interchange_end_page_content (surface);
if (unlikely (status))
return status;
status = _cairo_pdf_surface_close_content_stream (surface, FALSE);
if (unlikely (status))
return status;
_cairo_surface_clipper_reset (&surface->clipper);
status = _cairo_pdf_surface_write_page (surface);
if (unlikely (status))
return status;
_cairo_pdf_surface_clear (surface);
return CAIRO_STATUS_SUCCESS;
}
static cairo_bool_t
_cairo_pdf_surface_get_extents (void *abstract_surface,
cairo_rectangle_int_t *rectangle)
{
cairo_pdf_surface_t *surface = abstract_surface;
if (surface->surface_bounded)
*rectangle = surface->surface_extents;
return surface->surface_bounded;
}
static void
_cairo_pdf_surface_get_font_options (void *abstract_surface,
cairo_font_options_t *options)
{
_cairo_font_options_init_default (options);
cairo_font_options_set_hint_style (options, CAIRO_HINT_STYLE_NONE);
cairo_font_options_set_hint_metrics (options, CAIRO_HINT_METRICS_OFF);
cairo_font_options_set_antialias (options, CAIRO_ANTIALIAS_GRAY);
_cairo_font_options_set_round_glyph_positions (options, CAIRO_ROUND_GLYPH_POS_OFF);
}
static cairo_int_status_t
_cairo_pdf_surface_write_pages (cairo_pdf_surface_t *surface)
{
cairo_pdf_resource_t page;
int num_pages, i;
cairo_int_status_t status;
status = _cairo_pdf_surface_object_begin (surface, surface->pages_resource);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->object_stream.stream,
"<< /Type /Pages\n"
" /Kids [ ");
num_pages = _cairo_array_num_elements (&surface->pages);
for (i = 0; i < num_pages; i++) {
_cairo_array_copy_element (&surface->pages, i, &page);
_cairo_output_stream_printf (surface->object_stream.stream, "%d 0 R ", page.id);
}
_cairo_output_stream_printf (surface->object_stream.stream, "]\n");
_cairo_output_stream_printf (surface->object_stream.stream, " /Count %d\n", num_pages);
/* TODO: Figure out which other defaults to be inherited by /Page
* objects. */
_cairo_output_stream_printf (surface->object_stream.stream,
">>\n");
_cairo_pdf_surface_object_end (surface);
return CAIRO_INT_STATUS_SUCCESS;
}
cairo_int_status_t
_cairo_utf8_to_pdf_string (const char *utf8, char **str_out)
{
int i;
int len;
unsigned char *p;
cairo_bool_t ascii;
char *str;
cairo_int_status_t status = CAIRO_STATUS_SUCCESS;
ascii = TRUE;
p = (unsigned char *)utf8;
len = 0;
while (*p) {
if (*p < 32 || *p > 126) {
ascii = FALSE;
break;
}
if (*p == '(' || *p == ')' || *p == '\\')
len += 2;
else
len++;
p++;
}
if (ascii) {
str = _cairo_malloc (len + 3);
if (str == NULL)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
str[0] = '(';
p = (unsigned char *)utf8;
i = 1;
while (*p) {
if (*p == '(' || *p == ')' || *p == '\\')
str[i++] = '\\';
str[i++] = *p;
p++;
}
str[i++] = ')';
str[i++] = 0;
} else {
uint16_t *utf16 = NULL;
int utf16_len = 0;
status = _cairo_utf8_to_utf16 (utf8, -1, &utf16, &utf16_len);
if (unlikely (status))
return status;
str = _cairo_malloc (utf16_len*4 + 7);
if (str == NULL) {
free (utf16);
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
strcpy (str, "<FEFF");
for (i = 0; i < utf16_len; i++)
snprintf (str + 4*i + 5, 5, "%04X", utf16[i]);
strcat (str, ">");
free (utf16);
}
*str_out = str;
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_emit_unicode_for_glyph (cairo_pdf_surface_t *surface,
const char *utf8)
{
uint16_t *utf16 = NULL;
int utf16_len = 0;
cairo_int_status_t status;
int i;
if (utf8 && *utf8) {
status = _cairo_utf8_to_utf16 (utf8, -1, &utf16, &utf16_len);
if (unlikely (status == CAIRO_INT_STATUS_INVALID_STRING)) {
utf16 = NULL;
utf16_len = 0;
} else if (unlikely (status)) {
return status;
}
}
_cairo_output_stream_printf (surface->output, "<");
if (utf16 == NULL || utf16_len == 0) {
/* According to the "ToUnicode Mapping File Tutorial"
*
* Glyphs that do not map to a Unicode code point must be
* mapped to 0xfffd "REPLACEMENT CHARACTER".
*/
_cairo_output_stream_printf (surface->output,
"fffd");
} else {
for (i = 0; i < utf16_len; i++)
_cairo_output_stream_printf (surface->output,
"%04x", (int) (utf16[i]));
}
_cairo_output_stream_printf (surface->output, ">");
free (utf16);
return CAIRO_STATUS_SUCCESS;
}
/* Bob Jenkins hash
*
* Public domain code from:
*/
#define HASH_MIX(a,b,c) \
{ \
a -= b; a -= c; a ^= (c>>13); \
b -= c; b -= a; b ^= (a<<8); \
c -= a; c -= b; c ^= (b>>13); \
a -= b; a -= c; a ^= (c>>12); \
b -= c; b -= a; b ^= (a<<16); \
c -= a; c -= b; c ^= (b>>5); \
a -= b; a -= c; a ^= (c>>3); \
b -= c; b -= a; b ^= (a<<10); \
c -= a; c -= b; c ^= (b>>15); \
}
static uint32_t
_hash_data (const unsigned char *data, int length, uint32_t initval)
{
uint32_t a, b, c, len;
len = length;
a = b = 0x9e3779b9; /* the golden ratio; an arbitrary value */
c = initval; /* the previous hash value */
while (len >= 12) {
a += (data[0] + ((uint32_t)data[1]<<8) + ((uint32_t)data[2]<<16) + ((uint32_t)data[3]<<24));
b += (data[4] + ((uint32_t)data[5]<<8) + ((uint32_t)data[6]<<16) + ((uint32_t)data[7]<<24));
c += (data[8] + ((uint32_t)data[9]<<8) + ((uint32_t)data[10]<<16)+ ((uint32_t)data[11]<<24));
HASH_MIX (a,b,c);
data += 12;
len -= 12;
}
c += length;
switch(len) {
case 11: c+= ((uint32_t) data[10] << 24); /* fall through */
case 10: c+= ((uint32_t) data[9] << 16); /* fall through */
case 9 : c+= ((uint32_t) data[8] << 8); /* fall through */
case 8 : b+= ((uint32_t) data[7] << 24); /* fall through */
case 7 : b+= ((uint32_t) data[6] << 16); /* fall through */
case 6 : b+= ((uint32_t) data[5] << 8); /* fall through */
case 5 : b+= data[4]; /* fall through */
case 4 : a+= ((uint32_t) data[3] << 24); /* fall through */
case 3 : a+= ((uint32_t) data[2] << 16); /* fall through */
case 2 : a+= ((uint32_t) data[1] << 8); /* fall through */
case 1 : a+= data[0];
}
HASH_MIX (a,b,c);
return c;
}
static void
_create_font_subset_tag (cairo_scaled_font_subset_t *font_subset,
const char *font_name,
char *tag)
{
uint32_t hash;
int i;
hash = _hash_data ((unsigned char *) font_name, strlen(font_name), 0);
hash = _hash_data ((unsigned char *) (font_subset->glyphs),
font_subset->num_glyphs * sizeof(unsigned long), hash);
for (i = 0; i < 6; i++) {
tag[i] = 'A' + (hash % 26);
hash /= 26;
}
tag[i] = 0;
}
static cairo_int_status_t
_cairo_pdf_surface_emit_to_unicode_stream (cairo_pdf_surface_t *surface,
cairo_scaled_font_subset_t *font_subset,
cairo_pdf_resource_t *stream)
{
unsigned int i, num_bfchar;
cairo_int_status_t status;
stream->id = 0;
status = _cairo_pdf_surface_open_stream (surface,
NULL,
surface->compress_streams,
NULL);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output,
"/CIDInit /ProcSet findresource begin\n"
"12 dict begin\n"
"begincmap\n"
"/CIDSystemInfo\n"
"<< /Registry (Adobe)\n"
" /Ordering (UCS)\n"
" /Supplement 0\n"
">> def\n"
"/CMapName /Adobe-Identity-UCS def\n"
"/CMapType 2 def\n"
"1 begincodespacerange\n");
if (font_subset->is_composite && !font_subset->is_latin) {
_cairo_output_stream_printf (surface->output,
"<0000> <ffff>\n");
} else {
_cairo_output_stream_printf (surface->output,
"<00> <ff>\n");
}
_cairo_output_stream_printf (surface->output,
"endcodespacerange\n");
if (font_subset->is_scaled) {
/* Type 3 fonts include glyph 0 in the subset */
num_bfchar = font_subset->num_glyphs;
/* The CMap specification has a limit of 100 characters per beginbfchar operator */
_cairo_output_stream_printf (surface->output,
"%d beginbfchar\n",
num_bfchar > 100 ? 100 : num_bfchar);
for (i = 0; i < num_bfchar; i++) {
if (i != 0 && i % 100 == 0) {
_cairo_output_stream_printf (surface->output,
"endbfchar\n"
"%d beginbfchar\n",
num_bfchar - i > 100 ? 100 : num_bfchar - i);
}
_cairo_output_stream_printf (surface->output, "<%02x> ", i);
status = _cairo_pdf_surface_emit_unicode_for_glyph (surface,
font_subset->utf8[i]);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output,
"\n");
}
} else {
/* Other fonts reserve glyph 0 for .notdef. Omit glyph 0 from the /ToUnicode map */
num_bfchar = font_subset->num_glyphs - 1;
/* The CMap specification has a limit of 100 characters per beginbfchar operator */
_cairo_output_stream_printf (surface->output,
"%d beginbfchar\n",
num_bfchar > 100 ? 100 : num_bfchar);
for (i = 0; i < num_bfchar; i++) {
if (i != 0 && i % 100 == 0) {
_cairo_output_stream_printf (surface->output,
"endbfchar\n"
"%d beginbfchar\n",
num_bfchar - i > 100 ? 100 : num_bfchar - i);
}
if (font_subset->is_latin)
_cairo_output_stream_printf (surface->output, "<%02x> ", font_subset->to_latin_char[i + 1]);
else if (font_subset->is_composite)
_cairo_output_stream_printf (surface->output, "<%04x> ", i + 1);
else
_cairo_output_stream_printf (surface->output, "<%02x> ", i + 1);
status = _cairo_pdf_surface_emit_unicode_for_glyph (surface,
font_subset->utf8[i + 1]);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output,
"\n");
}
}
_cairo_output_stream_printf (surface->output,
"endbfchar\n");
_cairo_output_stream_printf (surface->output,
"endcmap\n"
"CMapName currentdict /CMap defineresource pop\n"
"end\n"
"end\n");
*stream = surface->pdf_stream.self;
return _cairo_pdf_surface_close_stream (surface);
}
#define PDF_UNITS_PER_EM 1000
static cairo_int_status_t
_cairo_pdf_surface_emit_cff_font (cairo_pdf_surface_t *surface,
cairo_scaled_font_subset_t *font_subset,
cairo_cff_subset_t *subset)
{
cairo_pdf_resource_t stream, descriptor, cidfont_dict;
cairo_pdf_resource_t subset_resource, to_unicode_stream;
cairo_pdf_font_t font;
unsigned int i, last_glyph;
cairo_int_status_t status;
char tag[10];
_create_font_subset_tag (font_subset, subset->ps_name, tag);
subset_resource = _cairo_pdf_surface_get_font_resource (surface,
font_subset->font_id,
font_subset->subset_id);
if (subset_resource.id == 0)
return CAIRO_STATUS_SUCCESS;
status = _cairo_pdf_surface_open_stream (surface,
NULL,
TRUE,
font_subset->is_latin ?
" /Subtype /Type1C\n" :
" /Subtype /CIDFontType0C\n");
if (unlikely (status))
return status;
stream = surface->pdf_stream.self;
_cairo_output_stream_write (surface->output,
subset->data, subset->data_length);
status = _cairo_pdf_surface_close_stream (surface);
if (unlikely (status))
return status;
status = _cairo_pdf_surface_emit_to_unicode_stream (surface,
font_subset,
&to_unicode_stream);
if (_cairo_int_status_is_error (status))
return status;
descriptor = _cairo_pdf_surface_new_object (surface);
if (descriptor.id == 0)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Type /FontDescriptor\n"
" /FontName /%s+%s\n",
descriptor.id,
tag,
subset->ps_name);
if (subset->family_name_utf8) {
char *pdf_str;
status = _cairo_utf8_to_pdf_string (subset->family_name_utf8, &pdf_str);
if (likely (status == CAIRO_INT_STATUS_SUCCESS)) {
_cairo_output_stream_printf (surface->output,
" /FontFamily %s\n",
pdf_str);
free (pdf_str);
} else if (status != CAIRO_INT_STATUS_INVALID_STRING) {
return status;
}
}
_cairo_output_stream_printf (surface->output,
" /Flags 4\n"
" /FontBBox [ %ld %ld %ld %ld ]\n"
" /ItalicAngle 0\n"
" /Ascent %ld\n"
" /Descent %ld\n"
" /CapHeight %ld\n"
" /StemV 80\n"
" /StemH 80\n"
" /FontFile3 %u 0 R\n"
">>\n"
"endobj\n",
(long)(subset->x_min*PDF_UNITS_PER_EM),
(long)(subset->y_min*PDF_UNITS_PER_EM),
(long)(subset->x_max*PDF_UNITS_PER_EM),
(long)(subset->y_max*PDF_UNITS_PER_EM),
(long)(subset->ascent*PDF_UNITS_PER_EM),
(long)(subset->descent*PDF_UNITS_PER_EM),
(long)(subset->y_max*PDF_UNITS_PER_EM),
stream.id);
if (font_subset->is_latin) {
/* find last glyph used */
for (i = 255; i >= 32; i--)
if (font_subset->latin_to_subset_glyph_index[i] > 0)
break;
last_glyph = i;
_cairo_pdf_surface_update_object (surface, subset_resource);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Type /Font\n"
" /Subtype /Type1\n"
" /BaseFont /%s+%s\n"
" /FirstChar 32\n"
" /LastChar %d\n"
" /FontDescriptor %d 0 R\n"
" /Encoding /WinAnsiEncoding\n"
" /Widths [",
subset_resource.id,
tag,
subset->ps_name,
last_glyph,
descriptor.id);
for (i = 32; i < last_glyph + 1; i++) {
int glyph = font_subset->latin_to_subset_glyph_index[i];
if (glyph > 0) {
_cairo_output_stream_printf (surface->output,
" %f",
(subset->widths[glyph]*PDF_UNITS_PER_EM));
} else {
_cairo_output_stream_printf (surface->output, " 0");
}
}
_cairo_output_stream_printf (surface->output,
" ]\n");
if (to_unicode_stream.id != 0)
_cairo_output_stream_printf (surface->output,
" /ToUnicode %d 0 R\n",
to_unicode_stream.id);
_cairo_output_stream_printf (surface->output,
">>\n"
"endobj\n");
} else {
cidfont_dict = _cairo_pdf_surface_new_object (surface);
if (cidfont_dict.id == 0)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Type /Font\n"
" /Subtype /CIDFontType0\n"
" /BaseFont /%s+%s\n"
" /CIDSystemInfo\n"
" << /Registry (Adobe)\n"
" /Ordering (Identity)\n"
" /Supplement 0\n"
" >>\n"
" /FontDescriptor %d 0 R\n"
" /W [0 [",
cidfont_dict.id,
tag,
subset->ps_name,
descriptor.id);
for (i = 0; i < font_subset->num_glyphs; i++)
_cairo_output_stream_printf (surface->output,
" %f",
(subset->widths[i]*PDF_UNITS_PER_EM));
_cairo_output_stream_printf (surface->output,
" ]]\n"
">>\n"
"endobj\n");
_cairo_pdf_surface_update_object (surface, subset_resource);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Type /Font\n"
" /Subtype /Type0\n"
" /BaseFont /%s+%s\n"
" /Encoding /Identity-H\n"
" /DescendantFonts [ %d 0 R]\n",
subset_resource.id,
tag,
subset->ps_name,
cidfont_dict.id);
if (to_unicode_stream.id != 0)
_cairo_output_stream_printf (surface->output,
" /ToUnicode %d 0 R\n",
to_unicode_stream.id);
_cairo_output_stream_printf (surface->output,
">>\n"
"endobj\n");
}
font.font_id = font_subset->font_id;
font.subset_id = font_subset->subset_id;
font.subset_resource = subset_resource;
status = _cairo_array_append (&surface->fonts, &font);
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_emit_cff_font_subset (cairo_pdf_surface_t *surface,
cairo_scaled_font_subset_t *font_subset)
{
cairo_int_status_t status;
cairo_cff_subset_t subset;
char name[64];
snprintf (name, sizeof name, "CairoFont-%d-%d",
font_subset->font_id, font_subset->subset_id);
status = _cairo_cff_subset_init (&subset, name, font_subset);
if (unlikely (status))
return status;
status = _cairo_pdf_surface_emit_cff_font (surface, font_subset, &subset);
_cairo_cff_subset_fini (&subset);
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_emit_cff_fallback_font (cairo_pdf_surface_t *surface,
cairo_scaled_font_subset_t *font_subset)
{
cairo_int_status_t status;
cairo_cff_subset_t subset;
char name[64];
/* CFF fallback subsetting does not work with 8-bit glyphs unless
* they are a latin subset */
if (!font_subset->is_composite && !font_subset->is_latin)
return CAIRO_INT_STATUS_UNSUPPORTED;
snprintf (name, sizeof name, "CairoFont-%d-%d",
font_subset->font_id, font_subset->subset_id);
status = _cairo_cff_fallback_init (&subset, name, font_subset);
if (unlikely (status))
return status;
status = _cairo_pdf_surface_emit_cff_font (surface, font_subset, &subset);
_cairo_cff_fallback_fini (&subset);
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_emit_type1_font (cairo_pdf_surface_t *surface,
cairo_scaled_font_subset_t *font_subset,
cairo_type1_subset_t *subset)
{
cairo_pdf_resource_t stream, descriptor, subset_resource, to_unicode_stream;
cairo_pdf_font_t font;
cairo_int_status_t status;
unsigned long length;
unsigned int i, last_glyph;
char tag[10];
_create_font_subset_tag (font_subset, subset->base_font, tag);
subset_resource = _cairo_pdf_surface_get_font_resource (surface,
font_subset->font_id,
font_subset->subset_id);
if (subset_resource.id == 0)
return CAIRO_STATUS_SUCCESS;
length = subset->header_length + subset->data_length + subset->trailer_length;
status = _cairo_pdf_surface_open_stream (surface,
NULL,
TRUE,
" /Length1 %lu\n"
" /Length2 %lu\n"
" /Length3 %lu\n",
subset->header_length,
subset->data_length,
subset->trailer_length);
if (unlikely (status))
return status;
stream = surface->pdf_stream.self;
_cairo_output_stream_write (surface->output, subset->data, length);
status = _cairo_pdf_surface_close_stream (surface);
if (unlikely (status))
return status;
status = _cairo_pdf_surface_emit_to_unicode_stream (surface,
font_subset,
&to_unicode_stream);
if (_cairo_int_status_is_error (status))
return status;
last_glyph = font_subset->num_glyphs - 1;
if (font_subset->is_latin) {
/* find last glyph used */
for (i = 255; i >= 32; i--)
if (font_subset->latin_to_subset_glyph_index[i] > 0)
break;
last_glyph = i;
}
descriptor = _cairo_pdf_surface_new_object (surface);
if (descriptor.id == 0)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Type /FontDescriptor\n"
" /FontName /%s+%s\n"
" /Flags 4\n"
" /FontBBox [ %ld %ld %ld %ld ]\n"
" /ItalicAngle 0\n"
" /Ascent %ld\n"
" /Descent %ld\n"
" /CapHeight %ld\n"
" /StemV 80\n"
" /StemH 80\n"
" /FontFile %u 0 R\n"
">>\n"
"endobj\n",
descriptor.id,
tag,
subset->base_font,
(long)(subset->x_min*PDF_UNITS_PER_EM),
(long)(subset->y_min*PDF_UNITS_PER_EM),
(long)(subset->x_max*PDF_UNITS_PER_EM),
(long)(subset->y_max*PDF_UNITS_PER_EM),
(long)(subset->ascent*PDF_UNITS_PER_EM),
(long)(subset->descent*PDF_UNITS_PER_EM),
(long)(subset->y_max*PDF_UNITS_PER_EM),
stream.id);
_cairo_pdf_surface_update_object (surface, subset_resource);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Type /Font\n"
" /Subtype /Type1\n"
" /BaseFont /%s+%s\n"
" /FirstChar %d\n"
" /LastChar %d\n"
" /FontDescriptor %d 0 R\n",
subset_resource.id,
tag,
subset->base_font,
font_subset->is_latin ? 32 : 0,
last_glyph,
descriptor.id);
if (font_subset->is_latin)
_cairo_output_stream_printf (surface->output, " /Encoding /WinAnsiEncoding\n");
_cairo_output_stream_printf (surface->output, " /Widths [");
if (font_subset->is_latin) {
for (i = 32; i < last_glyph + 1; i++) {
int glyph = font_subset->latin_to_subset_glyph_index[i];
if (glyph > 0) {
_cairo_output_stream_printf (surface->output,
" %f",
(subset->widths[glyph]*PDF_UNITS_PER_EM));
} else {
_cairo_output_stream_printf (surface->output, " 0");
}
}
} else {
for (i = 0; i < font_subset->num_glyphs; i++)
_cairo_output_stream_printf (surface->output,
" %f",
(subset->widths[i]*PDF_UNITS_PER_EM));
}
_cairo_output_stream_printf (surface->output,
" ]\n");
if (to_unicode_stream.id != 0)
_cairo_output_stream_printf (surface->output,
" /ToUnicode %d 0 R\n",
to_unicode_stream.id);
_cairo_output_stream_printf (surface->output,
">>\n"
"endobj\n");
font.font_id = font_subset->font_id;
font.subset_id = font_subset->subset_id;
font.subset_resource = subset_resource;
return _cairo_array_append (&surface->fonts, &font);
}
static cairo_int_status_t
_cairo_pdf_surface_emit_type1_font_subset (cairo_pdf_surface_t *surface,
cairo_scaled_font_subset_t *font_subset)
{
cairo_int_status_t status;
cairo_type1_subset_t subset;
char name[64];
/* 16-bit glyphs not compatible with Type 1 fonts */
if (font_subset->is_composite && !font_subset->is_latin)
return CAIRO_INT_STATUS_UNSUPPORTED;
snprintf (name, sizeof name, "CairoFont-%d-%d",
font_subset->font_id, font_subset->subset_id);
status = _cairo_type1_subset_init (&subset, name, font_subset, FALSE);
if (unlikely (status))
return status;
status = _cairo_pdf_surface_emit_type1_font (surface, font_subset, &subset);
_cairo_type1_subset_fini (&subset);
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_emit_type1_fallback_font (cairo_pdf_surface_t *surface,
cairo_scaled_font_subset_t *font_subset)
{
cairo_int_status_t status;
cairo_type1_subset_t subset;
char name[64];
/* 16-bit glyphs not compatible with Type 1 fonts */
if (font_subset->is_composite && !font_subset->is_latin)
return CAIRO_INT_STATUS_UNSUPPORTED;
snprintf (name, sizeof name, "CairoFont-%d-%d",
font_subset->font_id, font_subset->subset_id);
status = _cairo_type1_fallback_init_binary (&subset, name, font_subset);
if (unlikely (status))
return status;
status = _cairo_pdf_surface_emit_type1_font (surface, font_subset, &subset);
_cairo_type1_fallback_fini (&subset);
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_emit_truetype_font_subset (cairo_pdf_surface_t *surface,
cairo_scaled_font_subset_t *font_subset)
{
cairo_pdf_resource_t stream, descriptor, cidfont_dict;
cairo_pdf_resource_t subset_resource, to_unicode_stream;
cairo_int_status_t status;
cairo_pdf_font_t font;
cairo_truetype_subset_t subset;
unsigned int i, last_glyph;
char tag[10];
subset_resource = _cairo_pdf_surface_get_font_resource (surface,
font_subset->font_id,
font_subset->subset_id);
if (subset_resource.id == 0)
return CAIRO_STATUS_SUCCESS;
status = _cairo_truetype_subset_init_pdf (&subset, font_subset);
if (unlikely (status))
return status;
_create_font_subset_tag (font_subset, subset.ps_name, tag);
status = _cairo_pdf_surface_open_stream (surface,
NULL,
TRUE,
" /Length1 %lu\n",
subset.data_length);
if (unlikely (status)) {
_cairo_truetype_subset_fini (&subset);
return status;
}
stream = surface->pdf_stream.self;
_cairo_output_stream_write (surface->output,
subset.data, subset.data_length);
status = _cairo_pdf_surface_close_stream (surface);
if (unlikely (status)) {
_cairo_truetype_subset_fini (&subset);
return status;
}
status = _cairo_pdf_surface_emit_to_unicode_stream (surface,
font_subset,
&to_unicode_stream);
if (_cairo_int_status_is_error (status)) {
_cairo_truetype_subset_fini (&subset);
return status;
}
descriptor = _cairo_pdf_surface_new_object (surface);
if (descriptor.id == 0) {
_cairo_truetype_subset_fini (&subset);
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Type /FontDescriptor\n"
" /FontName /%s+%s\n",
descriptor.id,
tag,
subset.ps_name);
if (subset.family_name_utf8) {
char *pdf_str;
status = _cairo_utf8_to_pdf_string (subset.family_name_utf8, &pdf_str);
if (likely (status == CAIRO_INT_STATUS_SUCCESS)) {
_cairo_output_stream_printf (surface->output,
" /FontFamily %s\n",
pdf_str);
free (pdf_str);
} else if (status != CAIRO_INT_STATUS_INVALID_STRING) {
return status;
}
}
_cairo_output_stream_printf (surface->output,
" /Flags %d\n"
" /FontBBox [ %ld %ld %ld %ld ]\n"
" /ItalicAngle 0\n"
" /Ascent %ld\n"
" /Descent %ld\n"
" /CapHeight %ld\n"
" /StemV 80\n"
" /StemH 80\n"
" /FontFile2 %u 0 R\n"
">>\n"
"endobj\n",
font_subset->is_latin ? 32 : 4,
(long)(subset.x_min*PDF_UNITS_PER_EM),
(long)(subset.y_min*PDF_UNITS_PER_EM),
(long)(subset.x_max*PDF_UNITS_PER_EM),
(long)(subset.y_max*PDF_UNITS_PER_EM),
(long)(subset.ascent*PDF_UNITS_PER_EM),
(long)(subset.descent*PDF_UNITS_PER_EM),
(long)(subset.y_max*PDF_UNITS_PER_EM),
stream.id);
if (font_subset->is_latin) {
/* find last glyph used */
for (i = 255; i >= 32; i--)
if (font_subset->latin_to_subset_glyph_index[i] > 0)
break;
last_glyph = i;
_cairo_pdf_surface_update_object (surface, subset_resource);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Type /Font\n"
" /Subtype /TrueType\n"
" /BaseFont /%s+%s\n"
" /FirstChar 32\n"
" /LastChar %d\n"
" /FontDescriptor %d 0 R\n"
" /Encoding /WinAnsiEncoding\n"
" /Widths [",
subset_resource.id,
tag,
subset.ps_name,
last_glyph,
descriptor.id);
for (i = 32; i < last_glyph + 1; i++) {
int glyph = font_subset->latin_to_subset_glyph_index[i];
if (glyph > 0) {
_cairo_output_stream_printf (surface->output,
" %f",
(subset.widths[glyph]*PDF_UNITS_PER_EM));
} else {
_cairo_output_stream_printf (surface->output, " 0");
}
}
_cairo_output_stream_printf (surface->output,
" ]\n");
if (to_unicode_stream.id != 0)
_cairo_output_stream_printf (surface->output,
" /ToUnicode %d 0 R\n",
to_unicode_stream.id);
_cairo_output_stream_printf (surface->output,
">>\n"
"endobj\n");
} else {
cidfont_dict = _cairo_pdf_surface_new_object (surface);
if (cidfont_dict.id == 0) {
_cairo_truetype_subset_fini (&subset);
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Type /Font\n"
" /Subtype /CIDFontType2\n"
" /BaseFont /%s+%s\n"
" /CIDSystemInfo\n"
" << /Registry (Adobe)\n"
" /Ordering (Identity)\n"
" /Supplement 0\n"
" >>\n"
" /FontDescriptor %d 0 R\n"
" /W [0 [",
cidfont_dict.id,
tag,
subset.ps_name,
descriptor.id);
for (i = 0; i < font_subset->num_glyphs; i++)
_cairo_output_stream_printf (surface->output,
" %f",
(subset.widths[i]*PDF_UNITS_PER_EM));
_cairo_output_stream_printf (surface->output,
" ]]\n"
">>\n"
"endobj\n");
_cairo_pdf_surface_update_object (surface, subset_resource);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Type /Font\n"
" /Subtype /Type0\n"
" /BaseFont /%s+%s\n"
" /Encoding /Identity-H\n"
" /DescendantFonts [ %d 0 R]\n",
subset_resource.id,
tag,
subset.ps_name,
cidfont_dict.id);
if (to_unicode_stream.id != 0)
_cairo_output_stream_printf (surface->output,
" /ToUnicode %d 0 R\n",
to_unicode_stream.id);
_cairo_output_stream_printf (surface->output,
">>\n"
"endobj\n");
}
font.font_id = font_subset->font_id;
font.subset_id = font_subset->subset_id;
font.subset_resource = subset_resource;
status = _cairo_array_append (&surface->fonts, &font);
_cairo_truetype_subset_fini (&subset);
return status;
}
static cairo_int_status_t
_cairo_pdf_emit_imagemask (cairo_image_surface_t *image,
cairo_output_stream_t *stream)
{
uint8_t *byte, output_byte;
int row, col, num_cols;
/* The only image type supported by Type 3 fonts are 1-bit image
* masks */
assert (image->format == CAIRO_FORMAT_A1);
_cairo_output_stream_printf (stream,
"BI\n"
"/IM true\n"
"/W %d\n"
"/H %d\n"
"/BPC 1\n"
"/D [1 0]\n",
image->width,
image->height);
_cairo_output_stream_printf (stream,
"ID ");
num_cols = (image->width + 7) / 8;
for (row = 0; row < image->height; row++) {
byte = image->data + row * image->stride;
for (col = 0; col < num_cols; col++) {
output_byte = CAIRO_BITSWAP8_IF_LITTLE_ENDIAN (*byte);
_cairo_output_stream_write (stream, &output_byte, 1);
byte++;
}
}
_cairo_output_stream_printf (stream,
"\nEI\n");
return _cairo_output_stream_get_status (stream);
}
static cairo_int_status_t
_cairo_pdf_surface_analyze_user_font_subset (cairo_scaled_font_subset_t *font_subset,
void *closure)
{
cairo_pdf_surface_t *surface = closure;
cairo_int_status_t status = CAIRO_INT_STATUS_SUCCESS;
cairo_int_status_t status2;
unsigned int i;
cairo_surface_t *type3_surface;
cairo_output_stream_t *null_stream;
null_stream = _cairo_null_stream_create ();
type3_surface = _cairo_type3_glyph_surface_create (font_subset->scaled_font,
null_stream,
_cairo_pdf_emit_imagemask,
surface->font_subsets,
FALSE);
if (unlikely (type3_surface->status)) {
status2 = _cairo_output_stream_destroy (null_stream);
return type3_surface->status;
}
_cairo_type3_glyph_surface_set_font_subsets_callback (type3_surface,
_cairo_pdf_surface_add_font,
surface);
for (i = 0; i < font_subset->num_glyphs; i++) {
status = _cairo_type3_glyph_surface_analyze_glyph (type3_surface,
font_subset->glyphs[i]);
if (unlikely (status))
break;
}
cairo_surface_destroy (type3_surface);
status2 = _cairo_output_stream_destroy (null_stream);
if (status == CAIRO_INT_STATUS_SUCCESS)
status = status2;
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_emit_type3_font_subset (cairo_pdf_surface_t *surface,
cairo_scaled_font_subset_t *font_subset)
{
cairo_int_status_t status = CAIRO_STATUS_SUCCESS;
cairo_pdf_resource_t *glyphs, encoding, char_procs, subset_resource, to_unicode_stream;
cairo_pdf_font_t font;
double *widths;
unsigned int i;
cairo_box_t font_bbox = {{0,0},{0,0}};
cairo_box_t bbox = {{0,0},{0,0}};
cairo_surface_t *type3_surface;
if (font_subset->num_glyphs == 0)
return CAIRO_STATUS_SUCCESS;
subset_resource = _cairo_pdf_surface_get_font_resource (surface,
font_subset->font_id,
font_subset->subset_id);
if (subset_resource.id == 0)
return CAIRO_STATUS_SUCCESS;
glyphs = _cairo_malloc_ab (font_subset->num_glyphs, sizeof (cairo_pdf_resource_t));
if (unlikely (glyphs == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
widths = _cairo_malloc_ab (font_subset->num_glyphs, sizeof (double));
if (unlikely (widths == NULL)) {
free (glyphs);
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
_cairo_pdf_group_resources_clear (&surface->resources);
type3_surface = _cairo_type3_glyph_surface_create (font_subset->scaled_font,
NULL,
_cairo_pdf_emit_imagemask,
surface->font_subsets,
FALSE);
if (unlikely (type3_surface->status)) {
free (glyphs);
free (widths);
return type3_surface->status;
}
_cairo_type3_glyph_surface_set_font_subsets_callback (type3_surface,
_cairo_pdf_surface_add_font,
surface);
for (i = 0; i < font_subset->num_glyphs; i++) {
status = _cairo_pdf_surface_open_stream (surface,
NULL,
surface->compress_streams,
NULL);
if (unlikely (status))
break;
glyphs[i] = surface->pdf_stream.self;
status = _cairo_type3_glyph_surface_emit_glyph (type3_surface,
surface->output,
font_subset->glyphs[i],
&bbox,
&widths[i]);
if (unlikely (status))
break;
status = _cairo_pdf_surface_close_stream (surface);
if (unlikely (status))
break;
if (i == 0) {
font_bbox.p1.x = bbox.p1.x;
font_bbox.p1.y = bbox.p1.y;
font_bbox.p2.x = bbox.p2.x;
font_bbox.p2.y = bbox.p2.y;
} else {
if (bbox.p1.x < font_bbox.p1.x)
font_bbox.p1.x = bbox.p1.x;
if (bbox.p1.y < font_bbox.p1.y)
font_bbox.p1.y = bbox.p1.y;
if (bbox.p2.x > font_bbox.p2.x)
font_bbox.p2.x = bbox.p2.x;
if (bbox.p2.y > font_bbox.p2.y)
font_bbox.p2.y = bbox.p2.y;
}
}
cairo_surface_destroy (type3_surface);
if (unlikely (status)) {
free (glyphs);
free (widths);
return status;
}
encoding = _cairo_pdf_surface_new_object (surface);
if (encoding.id == 0) {
free (glyphs);
free (widths);
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Type /Encoding\n"
" /Differences [0", encoding.id);
for (i = 0; i < font_subset->num_glyphs; i++)
_cairo_output_stream_printf (surface->output,
" /%d", i);
_cairo_output_stream_printf (surface->output,
"]\n"
">>\n"
"endobj\n");
char_procs = _cairo_pdf_surface_new_object (surface);
if (char_procs.id == 0) {
free (glyphs);
free (widths);
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<<\n", char_procs.id);
for (i = 0; i < font_subset->num_glyphs; i++)
_cairo_output_stream_printf (surface->output,
" /%d %d 0 R\n",
i, glyphs[i].id);
_cairo_output_stream_printf (surface->output,
">>\n"
"endobj\n");
free (glyphs);
status = _cairo_pdf_surface_emit_to_unicode_stream (surface,
font_subset,
&to_unicode_stream);
if (_cairo_int_status_is_error (status)) {
free (widths);
return status;
}
_cairo_pdf_surface_update_object (surface, subset_resource);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Type /Font\n"
" /Subtype /Type3\n"
" /FontBBox [%f %f %f %f]\n"
" /FontMatrix [ 1 0 0 -1 0 0 ]\n"
" /Encoding %d 0 R\n"
" /CharProcs %d 0 R\n"
" /FirstChar 0\n"
" /LastChar %d\n",
subset_resource.id,
_cairo_fixed_to_double (font_bbox.p1.x),
_cairo_fixed_to_double (font_bbox.p1.y),
_cairo_fixed_to_double (font_bbox.p2.x),
_cairo_fixed_to_double (font_bbox.p2.y),
encoding.id,
char_procs.id,
font_subset->num_glyphs - 1);
_cairo_output_stream_printf (surface->output,
" /Widths [");
for (i = 0; i < font_subset->num_glyphs; i++)
_cairo_output_stream_printf (surface->output, " %f", widths[i]);
_cairo_output_stream_printf (surface->output,
"]\n");
free (widths);
_cairo_output_stream_printf (surface->output,
" /Resources\n");
_cairo_pdf_surface_emit_group_resources (surface, &surface->resources, FALSE);
if (to_unicode_stream.id != 0)
_cairo_output_stream_printf (surface->output,
" /ToUnicode %d 0 R\n",
to_unicode_stream.id);
_cairo_output_stream_printf (surface->output,
">>\n"
"endobj\n");
font.font_id = font_subset->font_id;
font.subset_id = font_subset->subset_id;
font.subset_resource = subset_resource;
return _cairo_array_append (&surface->fonts, &font);
}
static cairo_int_status_t
_cairo_pdf_surface_emit_unscaled_font_subset (cairo_scaled_font_subset_t *font_subset,
void *closure)
{
cairo_pdf_surface_t *surface = closure;
cairo_int_status_t status;
status = _cairo_pdf_surface_emit_cff_font_subset (surface, font_subset);
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
status = _cairo_pdf_surface_emit_truetype_font_subset (surface, font_subset);
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
status = _cairo_pdf_surface_emit_type1_font_subset (surface, font_subset);
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
status = _cairo_pdf_surface_emit_cff_fallback_font (surface, font_subset);
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
status = _cairo_pdf_surface_emit_type1_fallback_font (surface, font_subset);
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
ASSERT_NOT_REACHED;
return CAIRO_INT_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_pdf_surface_emit_scaled_font_subset (cairo_scaled_font_subset_t *font_subset,
void *closure)
{
cairo_pdf_surface_t *surface = closure;
cairo_int_status_t status;
status = _cairo_pdf_surface_emit_type3_font_subset (surface, font_subset);
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
ASSERT_NOT_REACHED;
return CAIRO_INT_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_pdf_surface_emit_font_subsets (cairo_pdf_surface_t *surface)
{
cairo_int_status_t status;
status = _cairo_scaled_font_subsets_foreach_user (surface->font_subsets,
_cairo_pdf_surface_analyze_user_font_subset,
surface);
if (unlikely (status))
goto BAIL;
status = _cairo_scaled_font_subsets_foreach_unscaled (surface->font_subsets,
_cairo_pdf_surface_emit_unscaled_font_subset,
surface);
if (unlikely (status))
goto BAIL;
status = _cairo_scaled_font_subsets_foreach_scaled (surface->font_subsets,
_cairo_pdf_surface_emit_scaled_font_subset,
surface);
if (unlikely (status))
goto BAIL;
status = _cairo_scaled_font_subsets_foreach_user (surface->font_subsets,
_cairo_pdf_surface_emit_scaled_font_subset,
surface);
BAIL:
_cairo_scaled_font_subsets_destroy (surface->font_subsets);
surface->font_subsets = NULL;
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_write_catalog (cairo_pdf_surface_t *surface,
cairo_pdf_resource_t catalog)
{
cairo_status_t status;
status = _cairo_pdf_surface_object_begin (surface, catalog);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->object_stream.stream,
"<< /Type /Catalog\n"
" /Pages %d 0 R\n",
surface->pages_resource.id);
if (surface->struct_tree_root.id != 0) {
_cairo_output_stream_printf (surface->object_stream.stream,
" /StructTreeRoot %d 0 R\n",
surface->struct_tree_root.id);
if (surface->tagged) {
_cairo_output_stream_printf (surface->object_stream.stream,
" /MarkInfo << /Marked true >>\n");
}
}
if (surface->outlines_dict_res.id != 0) {
_cairo_output_stream_printf (surface->object_stream.stream,
" /Outlines %d 0 R\n",
surface->outlines_dict_res.id);
}
if (surface->page_labels_res.id != 0) {
_cairo_output_stream_printf (surface->object_stream.stream,
" /PageLabels %d 0 R\n",
surface->page_labels_res.id);
}
if (surface->names_dict_res.id != 0) {
_cairo_output_stream_printf (surface->object_stream.stream,
" /Names %d 0 R\n",
surface->names_dict_res.id);
}
_cairo_output_stream_printf (surface->object_stream.stream,
">>\n");
_cairo_pdf_surface_object_end (surface);
return status;
}
static long
_cairo_pdf_surface_write_xref (cairo_pdf_surface_t *surface)
{
cairo_pdf_object_t *object;
int num_objects, i;
long offset;
char buffer[11];
num_objects = _cairo_array_num_elements (&surface->objects);
offset = _cairo_output_stream_get_position (surface->output);
_cairo_output_stream_printf (surface->output,
"xref\n"
"%d %d\n",
0, num_objects + 1);
_cairo_output_stream_printf (surface->output,
"0000000000 65535 f \n");
for (i = 0; i < num_objects; i++) {
object = _cairo_array_index (&surface->objects, i);
snprintf (buffer, sizeof buffer, "%010ld", object->u.offset);
_cairo_output_stream_printf (surface->output,
"%s 00000 n \n", buffer);
}
return offset;
}
static void
_cairo_write_xref_stream_entry (cairo_output_stream_t *stream,
int id,
int type,
int field2_size,
long field2,
int field3,
cairo_bool_t write_as_comments)
{
char buf[20];
int i;
if (write_as_comments) {
_cairo_output_stream_printf (stream, "%% %5d %2d %10ld %d\n", id, type, field2, field3);
} else {
/* Each field is big endian */
buf[0] = type; /* field 1 */
for (i = field2_size - 1; i >= 0; i--) {
buf[i + 1] = field2 & 0xff;
field2 >>= 8;
}
buf[field2_size + 1] = field3 >> 8;
buf[field2_size + 2] = field3 & 0xff;
_cairo_output_stream_write (stream, buf, field2_size + 3);
}
}
static void
_cairo_write_xref_stream_entrys (cairo_pdf_surface_t *surface,
cairo_output_stream_t *stream,
int field2_size,
cairo_bool_t write_as_comments)
{
cairo_pdf_object_t *object;
int num_objects, i;
/* PDF requires this to be first entry */
_cairo_write_xref_stream_entry (stream,
0,
PDF_OBJECT_FREE,
field2_size,
0, /* next free object number */
0xffff, /* next generation number */
write_as_comments);
num_objects = _cairo_array_num_elements (&surface->objects);
for (i = 0; i < num_objects; i++) {
object = _cairo_array_index (&surface->objects, i);
if (object->type == PDF_OBJECT_UNCOMPRESSED) {
_cairo_write_xref_stream_entry (stream,
i + 1,
object->type,
field2_size,
object->u.offset,
0, /* generation number */
write_as_comments);
} else if (object->type == PDF_OBJECT_COMPRESSED) {
_cairo_write_xref_stream_entry (stream,
i + 1,
object->type,
field2_size,
object->u.compressed_obj.xref_stream.id,
object->u.compressed_obj.index,
write_as_comments);
} else {
_cairo_write_xref_stream_entry (stream,
i + 1,
PDF_OBJECT_FREE,
field2_size,
0,
0xffff,
write_as_comments);
}
}
}
static cairo_int_status_t
_cairo_pdf_surface_write_xref_stream (cairo_pdf_surface_t *surface,
cairo_pdf_resource_t xref_res,
cairo_pdf_resource_t root_res,
cairo_pdf_resource_t info_res,
long *xref_offset)
{
cairo_output_stream_t *mem_stream;
cairo_output_stream_t *xref_stream;
long offset;
int offset_bytes;
cairo_status_t status;
*xref_offset = _cairo_output_stream_get_position (surface->output);
/* Find the minimum number of bytes required to represent offsets in the generated file (up to this point). */
offset_bytes = 0;
offset = *xref_offset;
while (offset > 0) {
offset >>= 8;
offset_bytes++;
}
mem_stream = _cairo_memory_stream_create ();
xref_stream = _cairo_deflate_stream_create (mem_stream);
_cairo_write_xref_stream_entrys (surface, xref_stream, offset_bytes, FALSE);
status = _cairo_output_stream_destroy (xref_stream);
if (unlikely (status))
return status;
_cairo_pdf_surface_update_object (surface, xref_res);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Type /XRef\n"
" /Length %d\n"
" /Filter /FlateDecode\n"
" /Size %d\n"
" /W [1 %d 2]\n"
" /Root %d 0 R\n"
" /Info %d 0 R\n"
">>\n",
xref_res.id,
_cairo_memory_stream_length (mem_stream),
surface->next_available_resource.id,
offset_bytes,
root_res.id,
info_res.id);
if (!surface->compress_streams) {
/* Adobe Reader requires xref streams to be flate encoded (PDF
* Reference 1.7, implementation note 20). This means
* compression must always be enabled on this stream. To
* facilitate debugging when compress_stream is disabled, emit
* a human readable format of the xref stream as PDF comments.
*/
_cairo_output_stream_printf (surface->output,
"%% id type offset/obj gen/index\n");
_cairo_write_xref_stream_entrys (surface, surface->output, offset_bytes, TRUE);
}
_cairo_output_stream_printf (surface->output,
"stream\n");
_cairo_memory_stream_copy (mem_stream, surface->output);
status = _cairo_output_stream_destroy (mem_stream);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output,
"\n"
"endstream\n"
"endobj\n");
return _cairo_output_stream_get_status (surface->output);
}
static cairo_int_status_t
_cairo_pdf_surface_write_mask_group (cairo_pdf_surface_t *surface,
cairo_pdf_smask_group_t *group)
{
cairo_pdf_resource_t mask_group;
cairo_pdf_resource_t smask;
cairo_pdf_smask_group_t *smask_group;
cairo_pdf_resource_t pattern_res, gstate_res;
cairo_int_status_t status;
cairo_box_double_t bbox;
/* Create mask group */
_get_bbox_from_extents (&group->extents, &bbox);
status = _cairo_pdf_surface_open_group (surface, &bbox, NULL);
if (unlikely (status))
return status;
if (_can_paint_pattern (group->mask)) {
_cairo_output_stream_printf (surface->output, "q\n");
status = _cairo_pdf_surface_paint_pattern (surface,
CAIRO_OPERATOR_OVER,
group->mask,
&group->extents,
1.0, /* alpha */
FALSE); /* mask */
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output, "Q\n");
} else {
pattern_res.id = 0;
gstate_res.id = 0;
status = _cairo_pdf_surface_add_pdf_pattern (surface, group->mask,
CAIRO_OPERATOR_OVER,
NULL,
&pattern_res, &gstate_res);
if (unlikely (status))
return status;
if (gstate_res.id != 0) {
smask_group = _cairo_pdf_surface_create_smask_group (surface, &group->extents);
if (unlikely (smask_group == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
smask_group->width = group->width;
smask_group->height = group->height;
smask_group->operation = PDF_PAINT;
smask_group->source = cairo_pattern_reference (group->mask);
smask_group->source_res = pattern_res;
status = _cairo_pdf_surface_add_smask_group (surface, smask_group);
if (unlikely (status)) {
_cairo_pdf_smask_group_destroy (smask_group);
return status;
}
status = _cairo_pdf_surface_add_smask (surface, gstate_res);
if (unlikely (status))
return status;
status = _cairo_pdf_surface_add_xobject (surface, smask_group->group_res);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output,
"q /s%d gs /x%d Do Q\n",
gstate_res.id,
smask_group->group_res.id);
} else {
status = _cairo_pdf_surface_select_pattern (surface, group->mask, pattern_res, FALSE);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output,
"%f %f %f %f re f\n",
bbox.p1.x,
bbox.p1.y,
bbox.p2.x - bbox.p1.x,
bbox.p2.y - bbox.p1.y);
status = _cairo_pdf_surface_unselect_pattern (surface);
if (unlikely (status))
return status;
}
}
status = _cairo_pdf_surface_close_group (surface, &mask_group);
if (unlikely (status))
return status;
/* Create source group */
status = _cairo_pdf_surface_open_group (surface, &bbox, &group->source_res);
if (unlikely (status))
return status;
if (_can_paint_pattern (group->source)) {
_cairo_output_stream_printf (surface->output, "q\n");
status = _cairo_pdf_surface_paint_pattern (surface,
CAIRO_OPERATOR_OVER,
group->source,
&group->extents,
1.0, /* alpha */
FALSE); /* mask */
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output, "Q\n");
} else {
pattern_res.id = 0;
gstate_res.id = 0;
status = _cairo_pdf_surface_add_pdf_pattern (surface, group->source,
CAIRO_OPERATOR_OVER,
NULL,
&pattern_res, &gstate_res);
if (unlikely (status))
return status;
if (gstate_res.id != 0) {
smask_group = _cairo_pdf_surface_create_smask_group (surface, &group->extents);
if (unlikely (smask_group == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
smask_group->operation = PDF_PAINT;
smask_group->source = cairo_pattern_reference (group->source);
smask_group->source_res = pattern_res;
status = _cairo_pdf_surface_add_smask_group (surface, smask_group);
if (unlikely (status)) {
_cairo_pdf_smask_group_destroy (smask_group);
return status;
}
status = _cairo_pdf_surface_add_smask (surface, gstate_res);
if (unlikely (status))
return status;
status = _cairo_pdf_surface_add_xobject (surface, smask_group->group_res);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output,
"q /s%d gs /x%d Do Q\n",
gstate_res.id,
smask_group->group_res.id);
} else {
status = _cairo_pdf_surface_select_pattern (surface, group->source, pattern_res, FALSE);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output,
"%f %f %f %f re f\n",
bbox.p1.x,
bbox.p1.y,
bbox.p2.x - bbox.p1.x,
bbox.p2.y - bbox.p1.y);
status = _cairo_pdf_surface_unselect_pattern (surface);
if (unlikely (status))
return status;
}
}
status = _cairo_pdf_surface_close_group (surface, NULL);
if (unlikely (status))
return status;
/* Create an smask based on the alpha component of mask_group */
smask = _cairo_pdf_surface_new_object (surface);
if (smask.id == 0)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Type /Mask\n"
" /S /Alpha\n"
" /G %d 0 R\n"
">>\n"
"endobj\n",
smask.id,
mask_group.id);
/* Create a GState that uses the smask */
_cairo_pdf_surface_update_object (surface, group->group_res);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\n"
"<< /Type /ExtGState\n"
" /SMask %d 0 R\n"
" /ca 1\n"
" /CA 1\n"
" /AIS false\n"
">>\n"
"endobj\n",
group->group_res.id,
smask.id);
return _cairo_output_stream_get_status (surface->output);
}
static cairo_int_status_t
_cairo_pdf_surface_write_smask_group (cairo_pdf_surface_t *surface,
cairo_pdf_smask_group_t *group)
{
double old_width, old_height;
cairo_bool_t old_in_xobject;
cairo_int_status_t status;
cairo_box_double_t bbox;
cairo_rectangle_int_t old_surface_extents;
old_width = surface->width;
old_height = surface->height;
old_surface_extents = surface->surface_extents;
old_in_xobject = surface->in_xobject;
surface->in_xobject = TRUE;
_cairo_pdf_surface_set_size_internal (surface,
group->width,
group->height);
_cairo_pdf_operators_reset (&surface->pdf_operators);
/* _mask is a special case that requires two groups - source
* and mask as well as a smask and gstate dictionary */
if (group->operation == PDF_MASK) {
status = _cairo_pdf_surface_write_mask_group (surface, group);
goto RESTORE_SIZE;
}
_get_bbox_from_extents (&group->extents, &bbox);
status = _cairo_pdf_surface_open_group (surface, &bbox, &group->group_res);
if (unlikely (status))
return status;
status = _cairo_pdf_surface_select_pattern (surface,
group->source,
group->source_res,
group->operation == PDF_STROKE);
if (unlikely (status))
return status;
switch (group->operation) {
case PDF_PAINT:
_cairo_output_stream_printf (surface->output,
"0 0 %f %f re f\n",
surface->width, surface->height);
break;
case PDF_MASK:
ASSERT_NOT_REACHED;
break;
case PDF_FILL:
status = _cairo_pdf_operators_fill (&surface->pdf_operators,
&group->path,
group->fill_rule);
break;
case PDF_STROKE:
status = _cairo_pdf_operators_stroke (&surface->pdf_operators,
&group->path,
&group->style,
&group->ctm,
&group->ctm_inverse);
break;
case PDF_SHOW_GLYPHS:
status = _cairo_pdf_operators_show_text_glyphs (&surface->pdf_operators,
group->utf8, group->utf8_len,
group->glyphs, group->num_glyphs,
group->clusters, group->num_clusters,
group->cluster_flags,
group->scaled_font);
break;
}
if (unlikely (status))
return status;
status = _cairo_pdf_surface_unselect_pattern (surface);
if (unlikely (status))
return status;
status = _cairo_pdf_surface_close_group (surface, NULL);
RESTORE_SIZE:
surface->in_xobject = old_in_xobject;
_cairo_pdf_surface_set_size_internal (surface,
old_width,
old_height);
surface->surface_extents = old_surface_extents;
_cairo_pdf_operators_reset (&surface->pdf_operators);
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_write_patterns_and_smask_groups (cairo_pdf_surface_t *surface,
cairo_bool_t finish)
{
cairo_pdf_pattern_t pattern;
cairo_pdf_smask_group_t *group;
cairo_pdf_source_surface_t src_surface;
unsigned int pattern_index, group_index, surface_index, doc_surface_index;
cairo_int_status_t status;
cairo_bool_t is_image;
/* Writing out PDF_MASK groups will cause additional smask groups
* to be appended to surface->smask_groups. Additional patterns
* may also be appended to surface->patterns.
*
* Writing recording surface patterns will cause additional patterns
* and groups to be appended.
*/
pattern_index = 0;
group_index = 0;
surface_index = 0;
doc_surface_index = 0;
while ((pattern_index < _cairo_array_num_elements (&surface->page_patterns)) ||
(group_index < _cairo_array_num_elements (&surface->smask_groups)) ||
(surface_index < _cairo_array_num_elements (&surface->page_surfaces)) ||
(finish && (doc_surface_index < _cairo_array_num_elements (&surface->doc_surfaces))))
{
for (; group_index < _cairo_array_num_elements (&surface->smask_groups); group_index++) {
_cairo_array_copy_element (&surface->smask_groups, group_index, &group);
status = _cairo_pdf_surface_write_smask_group (surface, group);
if (unlikely (status))
return status;
}
for (; pattern_index < _cairo_array_num_elements (&surface->page_patterns); pattern_index++) {
_cairo_array_copy_element (&surface->page_patterns, pattern_index, &pattern);
status = _cairo_pdf_surface_emit_pattern (surface, &pattern);
if (unlikely (status))
return status;
}
for (; surface_index < _cairo_array_num_elements (&surface->page_surfaces); surface_index++) {
_cairo_array_copy_element (&surface->page_surfaces, surface_index, &src_surface);
status = _cairo_pdf_surface_emit_surface (surface, &src_surface, FALSE, &is_image);
if (unlikely (status))
return status;
}
if (finish) {
for (; doc_surface_index < _cairo_array_num_elements (&surface->doc_surfaces); doc_surface_index++) {
_cairo_array_copy_element (&surface->doc_surfaces, doc_surface_index, &src_surface);
status = _cairo_pdf_surface_emit_surface (surface, &src_surface, FALSE, &is_image);
if (unlikely (status))
return status;
}
}
}
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_pdf_surface_write_page (cairo_pdf_surface_t *surface)
{
cairo_pdf_resource_t knockout, res, thumbnail_res;
cairo_pdf_resource_t *page;
cairo_int_status_t status;
unsigned int i, len, page_num, num_annots;
status = _cairo_pdf_surface_open_object_stream (surface);
if (unlikely (status))
return status;
status = _cairo_pdf_interchange_write_page_objects (surface);
if (unlikely (status))
return status;
_cairo_pdf_group_resources_clear (&surface->resources);
if (surface->has_fallback_images) {
cairo_rectangle_int_t extents;
cairo_box_double_t bbox;
extents.x = 0;
extents.y = 0;
extents.width = ceil (surface->width);
extents.height = ceil (surface->height);
_get_bbox_from_extents (&extents, &bbox);
status = _cairo_pdf_surface_open_knockout_group (surface, &bbox);
if (unlikely (status))
return status;
len = _cairo_array_num_elements (&surface->knockout_group);
for (i = 0; i < len; i++) {
_cairo_array_copy_element (&surface->knockout_group, i, &res);
_cairo_output_stream_printf (surface->output,
"/x%d Do\n",
res.id);
status = _cairo_pdf_surface_add_xobject (surface, res);
if (unlikely (status))
return status;
}
_cairo_output_stream_printf (surface->output,
"/x%d Do\n",
surface->content.id);
status = _cairo_pdf_surface_add_xobject (surface, surface->content);
if (unlikely (status))
return status;
status = _cairo_pdf_surface_close_group (surface, &knockout);
if (unlikely (status))
return status;
_cairo_pdf_group_resources_clear (&surface->resources);
status = _cairo_pdf_surface_open_content_stream (surface, NULL, NULL, FALSE, FALSE);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output,
"/x%d Do\n",
knockout.id);
status = _cairo_pdf_surface_add_xobject (surface, knockout);
if (unlikely (status))
return status;
status = _cairo_pdf_surface_close_content_stream (surface, FALSE);
if (unlikely (status))
return status;
}
thumbnail_res.id = 0;
if (surface->thumbnail_image) {
cairo_pdf_source_surface_entry_t entry;
memset (&entry, 0, sizeof (entry));
thumbnail_res = _cairo_pdf_surface_new_object (surface);
entry.surface_res = thumbnail_res;
_cairo_pdf_surface_emit_image (surface, surface->thumbnail_image, &entry);
}
page_num = _cairo_array_num_elements (&surface->pages);
page = _cairo_array_index (&surface->pages, page_num - 1);
status = _cairo_pdf_surface_object_begin (surface, *page);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->object_stream.stream,
"<< /Type /Page %% %d\n"
" /Parent %d 0 R\n"
" /MediaBox [ 0 0 %f %f ]\n"
" /Contents %d 0 R\n"
" /Group <<\n"
" /Type /Group\n"
" /S /Transparency\n"
" /I true\n"
" /CS /DeviceRGB\n"
" >>\n"
" /Resources %d 0 R\n",
page_num,
surface->pages_resource.id,
surface->width,
surface->height,
surface->content.id,
surface->content_resources.id);
if (surface->page_parent_tree >= 0) {
_cairo_output_stream_printf (surface->object_stream.stream,
" /StructParents %d\n",
surface->page_parent_tree);
}
num_annots = _cairo_array_num_elements (&surface->page_annots);
if (num_annots > 0) {
_cairo_output_stream_printf (surface->object_stream.stream,
" /Annots [ ");
for (i = 0; i < num_annots; i++) {
_cairo_array_copy_element (&surface->page_annots, i, &res);
_cairo_output_stream_printf (surface->object_stream.stream,
"%d 0 R ",
res.id);
}
_cairo_output_stream_printf (surface->object_stream.stream, "]\n");
}
if (thumbnail_res.id) {
_cairo_output_stream_printf (surface->object_stream.stream,
" /Thumb %d 0 R\n",
thumbnail_res.id);
}
_cairo_output_stream_printf (surface->object_stream.stream,
">>\n");
_cairo_pdf_surface_object_end (surface);
status = _cairo_pdf_surface_write_patterns_and_smask_groups (surface, FALSE);
if (unlikely (status))
return status;
return _cairo_pdf_surface_close_object_stream (surface);
}
static cairo_int_status_t
_cairo_pdf_surface_analyze_surface_pattern_transparency (cairo_pdf_surface_t *surface,
cairo_surface_pattern_t *pattern)
{
cairo_image_surface_t *image;
void *image_extra;
cairo_int_status_t status;
cairo_image_transparency_t transparency;
status = _cairo_surface_acquire_source_image (pattern->surface,
&image,
&image_extra);
if (unlikely (status))
return status;
if (image->base.status)
return image->base.status;
transparency = _cairo_image_analyze_transparency (image);
if (transparency == CAIRO_IMAGE_IS_OPAQUE)
status = CAIRO_STATUS_SUCCESS;
else
status = CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY;
_cairo_surface_release_source_image (pattern->surface, image, image_extra);
return status;
}
static cairo_bool_t
_surface_pattern_supported (cairo_surface_pattern_t *pattern)
{
cairo_extend_t extend;
if (pattern->surface->type == CAIRO_SURFACE_TYPE_RECORDING)
return TRUE;
if (pattern->surface->backend->acquire_source_image == NULL)
return FALSE;
/* Does an ALPHA-only source surface even make sense? Maybe, but I
* don't think it's worth the extra code to support it. */
/* XXX: Need to write this function here...
if (pattern->surface->content == CAIRO_CONTENT_ALPHA)
return FALSE;
*/
extend = cairo_pattern_get_extend (&pattern->base);
switch (extend) {
case CAIRO_EXTEND_NONE:
case CAIRO_EXTEND_REPEAT:
case CAIRO_EXTEND_REFLECT:
/* There's no point returning FALSE for EXTEND_PAD, as the image
* surface does not currently implement it either */
case CAIRO_EXTEND_PAD:
return TRUE;
}
ASSERT_NOT_REACHED;
return FALSE;
}
static cairo_bool_t
_pattern_supported (const cairo_pattern_t *pattern)
{
switch (pattern->type) {
case CAIRO_PATTERN_TYPE_SOLID:
case CAIRO_PATTERN_TYPE_LINEAR:
case CAIRO_PATTERN_TYPE_RADIAL:
case CAIRO_PATTERN_TYPE_MESH:
case CAIRO_PATTERN_TYPE_RASTER_SOURCE:
return TRUE;
case CAIRO_PATTERN_TYPE_SURFACE:
return _surface_pattern_supported ((cairo_surface_pattern_t *) pattern);
default:
ASSERT_NOT_REACHED;
return FALSE;
}
}
static cairo_bool_t
_pdf_operator_supported (cairo_operator_t op)
{
switch (op) {
case CAIRO_OPERATOR_OVER:
case CAIRO_OPERATOR_MULTIPLY:
case CAIRO_OPERATOR_SCREEN:
case CAIRO_OPERATOR_OVERLAY:
case CAIRO_OPERATOR_DARKEN:
case CAIRO_OPERATOR_LIGHTEN:
case CAIRO_OPERATOR_COLOR_DODGE:
case CAIRO_OPERATOR_COLOR_BURN:
case CAIRO_OPERATOR_HARD_LIGHT:
case CAIRO_OPERATOR_SOFT_LIGHT:
case CAIRO_OPERATOR_DIFFERENCE:
case CAIRO_OPERATOR_EXCLUSION:
case CAIRO_OPERATOR_HSL_HUE:
case CAIRO_OPERATOR_HSL_SATURATION:
case CAIRO_OPERATOR_HSL_COLOR:
case CAIRO_OPERATOR_HSL_LUMINOSITY:
return TRUE;
default:
case CAIRO_OPERATOR_CLEAR:
case CAIRO_OPERATOR_SOURCE:
case CAIRO_OPERATOR_IN:
case CAIRO_OPERATOR_OUT:
case CAIRO_OPERATOR_ATOP:
case CAIRO_OPERATOR_DEST:
case CAIRO_OPERATOR_DEST_OVER:
case CAIRO_OPERATOR_DEST_IN:
case CAIRO_OPERATOR_DEST_OUT:
case CAIRO_OPERATOR_DEST_ATOP:
case CAIRO_OPERATOR_XOR:
case CAIRO_OPERATOR_ADD:
case CAIRO_OPERATOR_SATURATE:
return FALSE;
}
}
static cairo_int_status_t
_cairo_pdf_surface_analyze_operation (cairo_pdf_surface_t *surface,
cairo_operator_t op,
const cairo_pattern_t *pattern,
const cairo_rectangle_int_t *extents)
{
if (surface->force_fallbacks &&
surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE)
{
return CAIRO_INT_STATUS_UNSUPPORTED;
}
if (! _pattern_supported (pattern))
return CAIRO_INT_STATUS_UNSUPPORTED;
if (_pdf_operator_supported (op)) {
if (pattern->type == CAIRO_PATTERN_TYPE_SURFACE) {
cairo_surface_pattern_t *surface_pattern = (cairo_surface_pattern_t *) pattern;
if (surface_pattern->surface->type == CAIRO_SURFACE_TYPE_RECORDING) {
if (pattern->extend == CAIRO_EXTEND_PAD) {
cairo_box_t box;
cairo_rectangle_int_t rect;
cairo_rectangle_int_t rec_extents;
/* get the operation extents in pattern space */
_cairo_box_from_rectangle (&box, extents);
_cairo_matrix_transform_bounding_box_fixed (&pattern->matrix, &box, NULL);
_cairo_box_round_to_rectangle (&box, &rect);
/* Check if surface needs padding to fill extents */
if (_cairo_surface_get_extents (surface_pattern->surface, &rec_extents)) {
if (_cairo_fixed_integer_ceil(box.p1.x) < rec_extents.x ||
_cairo_fixed_integer_ceil(box.p1.y) < rec_extents.y ||
_cairo_fixed_integer_floor(box.p2.x) > rec_extents.x + rec_extents.width ||
_cairo_fixed_integer_floor(box.p2.y) > rec_extents.y + rec_extents.height)
{
return CAIRO_INT_STATUS_UNSUPPORTED;
}
}
}
return CAIRO_INT_STATUS_ANALYZE_RECORDING_SURFACE_PATTERN;
}
}
return CAIRO_STATUS_SUCCESS;
}
/* The SOURCE operator is supported if the pattern is opaque or if
* there is nothing painted underneath. */
if (op == CAIRO_OPERATOR_SOURCE) {
if (pattern->type == CAIRO_PATTERN_TYPE_SURFACE) {
cairo_surface_pattern_t *surface_pattern = (cairo_surface_pattern_t *) pattern;
if (surface_pattern->surface->type == CAIRO_SURFACE_TYPE_RECORDING) {
if (_cairo_pattern_is_opaque (pattern, extents)) {
return CAIRO_INT_STATUS_ANALYZE_RECORDING_SURFACE_PATTERN;
} else {
/* FIXME: The analysis surface does not yet have
* the capability to analyze a non opaque recording
* surface and mark it supported if there is
* nothing underneath. For now recording surfaces of
* type CONTENT_COLOR_ALPHA painted with
* OPERATOR_SOURCE will result in a fallback
* image. */
return CAIRO_INT_STATUS_UNSUPPORTED;
}
} else {
return _cairo_pdf_surface_analyze_surface_pattern_transparency (surface,
surface_pattern);
}
}
if (_cairo_pattern_is_opaque (pattern, extents))
return CAIRO_STATUS_SUCCESS;
else
return CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY;
}
return CAIRO_INT_STATUS_UNSUPPORTED;
}
static cairo_bool_t
_cairo_pdf_surface_operation_supported (cairo_pdf_surface_t *surface,
cairo_operator_t op,
const cairo_pattern_t *pattern,
const cairo_rectangle_int_t *extents)
{
return _cairo_pdf_surface_analyze_operation (surface, op, pattern, extents) != CAIRO_INT_STATUS_UNSUPPORTED;
}
static cairo_int_status_t
_cairo_pdf_surface_start_fallback (cairo_pdf_surface_t *surface)
{
cairo_box_double_t bbox;
cairo_int_status_t status;
status = _cairo_pdf_surface_close_content_stream (surface, FALSE);
if (unlikely (status))
return status;
status = _cairo_array_append (&surface->knockout_group, &surface->content);
if (unlikely (status))
return status;
_cairo_pdf_group_resources_clear (&surface->resources);
bbox.p1.x = 0;
bbox.p1.y = 0;
bbox.p2.x = surface->width;
bbox.p2.y = surface->height;
status = _cairo_pdf_surface_open_content_stream (surface, &bbox, NULL, TRUE, TRUE);
if (unlikely (status))
return status;
return _cairo_pdf_interchange_begin_page_content (surface);
}
/* If source is an opaque image and mask is an image and both images
* have the same bounding box we can emit them as a image/smask pair.
*/
static cairo_int_status_t
_cairo_pdf_surface_emit_combined_smask (cairo_pdf_surface_t *surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_pattern_t *mask,
const cairo_rectangle_int_t *extents)
{
cairo_int_status_t status;
cairo_image_surface_t *image;
void *image_extra;
cairo_image_transparency_t transparency;
int src_width, src_height;
int mask_width, mask_height;
double src_x_offset, src_y_offset;
double mask_x_offset, mask_y_offset;
double src_x1, src_y1, src_x2, src_y2;
double mask_x1, mask_y1, mask_x2, mask_y2;
cairo_matrix_t p2u;
double src_radius, mask_radius, e;
cairo_bool_t need_smask;
cairo_pdf_source_surface_entry_t *pdf_source;
/* Check that source and mask are images */
if (!((source->type == CAIRO_PATTERN_TYPE_SURFACE || source->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE) &&
(mask->type == CAIRO_PATTERN_TYPE_SURFACE || mask->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE)))
return CAIRO_INT_STATUS_UNSUPPORTED;
if (source->type == CAIRO_PATTERN_TYPE_SURFACE &&
((cairo_surface_pattern_t *) source)->surface->type == CAIRO_SURFACE_TYPE_RECORDING)
{
return CAIRO_INT_STATUS_UNSUPPORTED;
}
if (mask->type == CAIRO_PATTERN_TYPE_SURFACE &&
((cairo_surface_pattern_t *) mask)->surface->type == CAIRO_SURFACE_TYPE_RECORDING)
{
return CAIRO_INT_STATUS_UNSUPPORTED;
}
if (source->extend != CAIRO_EXTEND_NONE || mask->extend != CAIRO_EXTEND_NONE)
return CAIRO_INT_STATUS_UNSUPPORTED;
/* Check that source is opaque and get image sizes */
status = _cairo_pdf_surface_acquire_source_image_from_pattern (surface, source,
&image, &image_extra);
if (unlikely (status))
return status;
if (image->base.status)
return image->base.status;
src_width = image->width;
src_height = image->height;
if (source->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE) {
cairo_surface_get_device_offset (&image->base, &src_x_offset, &src_y_offset);
} else {
src_x_offset = 0;
src_y_offset = 0;
}
transparency = _cairo_image_analyze_transparency (image);
_cairo_pdf_surface_release_source_image_from_pattern (surface, source, image, image_extra);
if (transparency != CAIRO_IMAGE_IS_OPAQUE)
return CAIRO_INT_STATUS_UNSUPPORTED;
status = _cairo_pdf_surface_acquire_source_image_from_pattern (surface, mask,
&image, &image_extra);
if (unlikely (status))
return status;
if (image->base.status)
return image->base.status;
mask_width = image->width;
mask_height = image->height;
if (mask->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE) {
cairo_surface_get_device_offset (&image->base, &mask_x_offset, &mask_y_offset);
} else {
mask_x_offset = 0;
mask_y_offset = 0;
}
transparency = _cairo_image_analyze_transparency (image);
need_smask = transparency != CAIRO_IMAGE_IS_OPAQUE;
_cairo_pdf_surface_release_source_image_from_pattern (surface, mask, image, image_extra);
/* Check that both images have the same extents with a tolerance
* of half the smallest source pixel. */
p2u = source->matrix;
status = cairo_matrix_invert (&p2u);
/* cairo_pattern_set_matrix ensures the matrix is invertible */
assert (status == CAIRO_INT_STATUS_SUCCESS);
src_x1 = 0;
src_y1 = 0;
src_x2 = src_width;
src_y2 = src_height;
cairo_matrix_transform_point (&p2u, &src_x1, &src_y1);
cairo_matrix_transform_point (&p2u, &src_x2, &src_y2);
src_radius = _cairo_matrix_transformed_circle_major_axis (&p2u, 0.5);
p2u = mask->matrix;
status = cairo_matrix_invert (&p2u);
/* cairo_pattern_set_matrix ensures the matrix is invertible */
assert (status == CAIRO_INT_STATUS_SUCCESS);
mask_x1 = 0;
mask_y1 = 0;
mask_x2 = mask_width;
mask_y2 = mask_height;
cairo_matrix_transform_point (&p2u, &mask_x1, &mask_y1);
cairo_matrix_transform_point (&p2u, &mask_x2, &mask_y2);
mask_radius = _cairo_matrix_transformed_circle_major_axis (&p2u, 0.5);
if (src_radius < mask_radius)
e = src_radius;
else
e = mask_radius;
if (fabs(src_x1 - mask_x1) > e ||
fabs(src_x2 - mask_x2) > e ||
fabs(src_y1 - mask_y1) > e ||
fabs(src_y2 - mask_y2) > e)
return CAIRO_INT_STATUS_UNSUPPORTED;
/* Check both images have same device offset */
if (fabs(src_x_offset - mask_x_offset) > e ||
fabs(src_y_offset - mask_y_offset) > e)
return CAIRO_INT_STATUS_UNSUPPORTED;
if (need_smask) {
status = _cairo_pdf_surface_add_source_surface (surface,
NULL,
mask,
op,
source->filter,
FALSE, /* stencil mask */
TRUE, /* smask */
FALSE, /* need_transp_group */
extents,
NULL, /* smask_res */
&pdf_source,
NULL,
NULL,
NULL);
if (unlikely (status))
return status;
}
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output, "q\n");
status = _cairo_pdf_surface_paint_surface_pattern (surface, op, source, extents,
1.0, /* alpha */
need_smask ? &pdf_source->surface_res : NULL,
FALSE);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output, "Q\n");
status = _cairo_output_stream_get_status (surface->output);
return status;
}
/* A PDF stencil mask is an A1 mask used with the current color */
static cairo_int_status_t
_cairo_pdf_surface_emit_stencil_mask (cairo_pdf_surface_t *surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_pattern_t *mask,
const cairo_rectangle_int_t *extents)
{
cairo_int_status_t status;
cairo_image_surface_t *image;
void *image_extra;
cairo_image_transparency_t transparency;
cairo_pdf_resource_t pattern_res = {0};
if (! (source->type == CAIRO_PATTERN_TYPE_SOLID &&
(mask->type == CAIRO_PATTERN_TYPE_SURFACE || mask->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE)))
return CAIRO_INT_STATUS_UNSUPPORTED;
if (mask->type == CAIRO_PATTERN_TYPE_SURFACE &&
((cairo_surface_pattern_t *) mask)->surface->type == CAIRO_SURFACE_TYPE_RECORDING)
{
return CAIRO_INT_STATUS_UNSUPPORTED;
}
status = _cairo_pdf_surface_acquire_source_image_from_pattern (surface, mask,
&image, &image_extra);
if (unlikely (status))
return status;
if (image->base.status)
return image->base.status;
transparency = _cairo_image_analyze_transparency (image);
if (transparency != CAIRO_IMAGE_IS_OPAQUE &&
transparency != CAIRO_IMAGE_HAS_BILEVEL_ALPHA)
{
status = CAIRO_INT_STATUS_UNSUPPORTED;
goto cleanup;
}
status = _cairo_pdf_surface_select_pattern (surface, source,
pattern_res, FALSE);
if (unlikely (status))
return status;
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output, "q\n");
status = _cairo_pdf_surface_paint_surface_pattern (surface, op, mask, extents, 1.0, NULL, TRUE);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->output, "Q\n");
status = _cairo_output_stream_get_status (surface->output);
cleanup:
_cairo_pdf_surface_release_source_image_from_pattern (surface, mask, image, image_extra);
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_set_clip (cairo_pdf_surface_t *surface,
cairo_composite_rectangles_t *composite)
{
cairo_clip_t *clip = composite->clip;
if (_cairo_composite_rectangles_can_reduce_clip (composite, clip))
clip = NULL;
if (clip == NULL) {
if (_cairo_composite_rectangles_can_reduce_clip (composite,
surface->clipper.clip))
return CAIRO_STATUS_SUCCESS;
}
return _cairo_surface_clipper_set_clip (&surface->clipper, clip);
}
static cairo_int_status_t
_cairo_pdf_surface_paint (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_clip_t *clip)
{
cairo_pdf_surface_t *surface = abstract_surface;
cairo_pdf_smask_group_t *group;
cairo_pdf_resource_t pattern_res, gstate_res;
cairo_composite_rectangles_t extents;
cairo_int_status_t status;
status = _cairo_composite_rectangles_init_for_paint (&extents,
&surface->base,
op, source, clip);
if (unlikely (status))
return status;
status = _cairo_pdf_interchange_add_operation_extents (surface, &extents.bounded);
if (unlikely (status))
return status;
if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) {
status = _cairo_pdf_surface_analyze_operation (surface, op, source, &extents.bounded);
goto cleanup;
} else if (surface->paginated_mode == CAIRO_PAGINATED_MODE_FALLBACK) {
status = _cairo_pdf_surface_start_fallback (surface);
if (unlikely (status))
goto cleanup;
}
assert (_cairo_pdf_surface_operation_supported (surface, op, source, &extents.bounded));
status = _cairo_pdf_surface_set_clip (surface, &extents);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_surface_select_operator (surface, op);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (unlikely (status))
goto cleanup;
if (_can_paint_pattern (source)) {
_cairo_output_stream_printf (surface->output, "q\n");
status = _cairo_pdf_surface_paint_pattern (surface,
op,
source,
&extents.bounded,
1.0, /* alpha */
FALSE); /* mask */
if (unlikely (status))
goto cleanup;
_cairo_output_stream_printf (surface->output, "Q\n");
_cairo_composite_rectangles_fini (&extents);
return _cairo_output_stream_get_status (surface->output);
}
pattern_res.id = 0;
gstate_res.id = 0;
status = _cairo_pdf_surface_add_pdf_pattern (surface, source, op,
&extents.bounded,
&pattern_res, &gstate_res);
if (unlikely (status))
goto cleanup;
if (gstate_res.id != 0) {
group = _cairo_pdf_surface_create_smask_group (surface, &extents.bounded);
if (unlikely (group == NULL)) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto cleanup;
}
group->operation = PDF_PAINT;
status = _cairo_pattern_create_copy (&group->source, source);
if (unlikely (status)) {
_cairo_pdf_smask_group_destroy (group);
goto cleanup;
}
group->source_res = pattern_res;
status = _cairo_pdf_surface_add_smask_group (surface, group);
if (unlikely (status)) {
_cairo_pdf_smask_group_destroy (group);
goto cleanup;
}
status = _cairo_pdf_surface_add_smask (surface, gstate_res);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_surface_add_xobject (surface, group->group_res);
if (unlikely (status))
goto cleanup;
_cairo_output_stream_printf (surface->output,
"q /s%d gs /x%d Do Q\n",
gstate_res.id,
group->group_res.id);
} else {
status = _cairo_pdf_surface_select_pattern (surface, source,
pattern_res, FALSE);
if (unlikely (status))
goto cleanup;
_cairo_output_stream_printf (surface->output,
"%d %d %d %d re f\n",
surface->surface_extents.x,
surface->surface_extents.y,
surface->surface_extents.width,
surface->surface_extents.height);
status = _cairo_pdf_surface_unselect_pattern (surface);
if (unlikely (status))
goto cleanup;
}
_cairo_composite_rectangles_fini (&extents);
return _cairo_output_stream_get_status (surface->output);
cleanup:
_cairo_composite_rectangles_fini (&extents);
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_mask (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_pattern_t *mask,
const cairo_clip_t *clip)
{
cairo_pdf_surface_t *surface = abstract_surface;
cairo_pdf_smask_group_t *group;
cairo_composite_rectangles_t extents;
cairo_int_status_t status;
cairo_rectangle_int_t r;
cairo_box_t box;
double alpha;
status = _cairo_composite_rectangles_init_for_mask (&extents,
&surface->base,
op, source, mask, clip);
if (unlikely (status))
return status;
status = _cairo_pdf_interchange_add_operation_extents (surface, &extents.bounded);
if (unlikely (status))
return status;
if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) {
cairo_int_status_t source_status, mask_status;
status = _cairo_pdf_surface_analyze_operation (surface, op, source, &extents.bounded);
if (_cairo_int_status_is_error (status))
goto cleanup;
source_status = status;
if (mask->has_component_alpha) {
status = CAIRO_INT_STATUS_UNSUPPORTED;
} else {
status = _cairo_pdf_surface_analyze_operation (surface, op, mask, &extents.bounded);
if (_cairo_int_status_is_error (status))
goto cleanup;
}
mask_status = status;
_cairo_composite_rectangles_fini (&extents);
return _cairo_analysis_surface_merge_status (source_status,
mask_status);
} else if (surface->paginated_mode == CAIRO_PAGINATED_MODE_FALLBACK) {
status = _cairo_pdf_surface_start_fallback (surface);
if (unlikely (status))
goto cleanup;
}
assert (_cairo_pdf_surface_operation_supported (surface, op, source, &extents.bounded));
assert (_cairo_pdf_surface_operation_supported (surface, op, mask, &extents.bounded));
/* get the accurate extents */
status = _cairo_pattern_get_ink_extents (source, &r);
if (unlikely (status))
goto cleanup;
/* XXX slight impedance mismatch */
_cairo_box_from_rectangle (&box, &r);
status = _cairo_composite_rectangles_intersect_source_extents (&extents,
&box);
if (unlikely (status))
goto cleanup;
status = _cairo_pattern_get_ink_extents (mask, &r);
if (unlikely (status))
goto cleanup;
_cairo_box_from_rectangle (&box, &r);
status = _cairo_composite_rectangles_intersect_mask_extents (&extents,
&box);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_surface_set_clip (surface, &extents);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_surface_select_operator (surface, op);
if (unlikely (status))
goto cleanup;
/* Check if we can combine source and mask into a smask image */
status = _cairo_pdf_surface_emit_combined_smask (surface, op, source, mask, &extents.bounded);
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
goto cleanup;
/* Check if we can use a stencil mask */
status = _cairo_pdf_surface_emit_stencil_mask (surface, op, source, mask, &extents.bounded);
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
goto cleanup;
/* Check if we can set ca/CA instead of an smask. We could handle
* other source patterns as well but for now this is the easiest,
* and most common, case to handle. */
if (_cairo_pattern_is_constant_alpha (mask, &extents.bounded, &alpha) &&
_can_paint_pattern (source)) {
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (unlikely (status))
goto cleanup;
_cairo_output_stream_printf (surface->output, "q\n");
status = _cairo_pdf_surface_paint_pattern (surface,
op,
source,
&extents.bounded,
alpha,
FALSE); /* mask */
if (unlikely (status))
goto cleanup;
_cairo_output_stream_printf (surface->output, "Q\n");
_cairo_composite_rectangles_fini (&extents);
return _cairo_output_stream_get_status (surface->output);
}
group = _cairo_pdf_surface_create_smask_group (surface, &extents.bounded);
if (unlikely (group == NULL)) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto cleanup;
}
group->operation = PDF_MASK;
status = _cairo_pattern_create_copy (&group->source, source);
if (unlikely (status)) {
_cairo_pdf_smask_group_destroy (group);
goto cleanup;
}
status = _cairo_pattern_create_copy (&group->mask, mask);
if (unlikely (status)) {
_cairo_pdf_smask_group_destroy (group);
goto cleanup;
}
group->source_res = _cairo_pdf_surface_new_object (surface);
if (group->source_res.id == 0) {
_cairo_pdf_smask_group_destroy (group);
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto cleanup;
}
status = _cairo_pdf_surface_add_smask_group (surface, group);
if (unlikely (status)) {
_cairo_pdf_smask_group_destroy (group);
goto cleanup;
}
status = _cairo_pdf_surface_add_smask (surface, group->group_res);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_surface_add_xobject (surface, group->source_res);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (unlikely (status))
goto cleanup;
_cairo_output_stream_printf (surface->output,
"q /s%d gs /x%d Do Q\n",
group->group_res.id,
group->source_res.id);
_cairo_composite_rectangles_fini (&extents);
return _cairo_output_stream_get_status (surface->output);
cleanup:
_cairo_composite_rectangles_fini (&extents);
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_stroke (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_path_fixed_t *path,
const cairo_stroke_style_t *style,
const cairo_matrix_t *ctm,
const cairo_matrix_t *ctm_inverse,
double tolerance,
cairo_antialias_t antialias,
const cairo_clip_t *clip)
{
cairo_pdf_surface_t *surface = abstract_surface;
cairo_pdf_smask_group_t *group;
cairo_pdf_resource_t pattern_res, gstate_res;
cairo_composite_rectangles_t extents;
cairo_int_status_t status;
status = _cairo_composite_rectangles_init_for_stroke (&extents,
&surface->base,
op, source,
path, style, ctm,
clip);
if (unlikely (status))
return status;
/* use the more accurate extents */
if (extents.is_bounded) {
cairo_rectangle_int_t mask;
cairo_box_t box;
status = _cairo_path_fixed_stroke_extents (path, style,
ctm, ctm_inverse,
tolerance,
&mask);
if (unlikely (status))
goto cleanup;
_cairo_box_from_rectangle (&box, &mask);
status = _cairo_composite_rectangles_intersect_mask_extents (&extents,
&box);
if (unlikely (status))
goto cleanup;
}
status = _cairo_pdf_interchange_add_operation_extents (surface, &extents.bounded);
if (unlikely (status))
goto cleanup;
if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) {
status = _cairo_pdf_surface_analyze_operation (surface, op, source, &extents.bounded);
goto cleanup;
}
assert (_cairo_pdf_surface_operation_supported (surface, op, source, &extents.bounded));
status = _cairo_pdf_surface_set_clip (surface, &extents);
if (unlikely (status))
goto cleanup;
pattern_res.id = 0;
gstate_res.id = 0;
status = _cairo_pdf_surface_add_pdf_pattern (surface, source, op,
&extents.bounded,
&pattern_res, &gstate_res);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_surface_select_operator (surface, op);
if (unlikely (status))
goto cleanup;
if (gstate_res.id != 0) {
group = _cairo_pdf_surface_create_smask_group (surface, &extents.bounded);
if (unlikely (group == NULL)) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto cleanup;
}
group->operation = PDF_STROKE;
status = _cairo_pattern_create_copy (&group->source, source);
if (unlikely (status)) {
_cairo_pdf_smask_group_destroy (group);
goto cleanup;
}
group->source_res = pattern_res;
status = _cairo_path_fixed_init_copy (&group->path, path);
if (unlikely (status)) {
_cairo_pdf_smask_group_destroy (group);
goto cleanup;
}
group->style = *style;
group->ctm = *ctm;
group->ctm_inverse = *ctm_inverse;
status = _cairo_pdf_surface_add_smask_group (surface, group);
if (unlikely (status)) {
_cairo_pdf_smask_group_destroy (group);
goto cleanup;
}
status = _cairo_pdf_surface_add_smask (surface, gstate_res);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_surface_add_xobject (surface, group->group_res);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (unlikely (status))
goto cleanup;
_cairo_output_stream_printf (surface->output,
"q /s%d gs /x%d Do Q\n",
gstate_res.id,
group->group_res.id);
} else {
status = _cairo_pdf_surface_select_pattern (surface, source, pattern_res, TRUE);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_operators_stroke (&surface->pdf_operators,
path,
style,
ctm,
ctm_inverse);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_surface_unselect_pattern (surface);
if (unlikely (status))
goto cleanup;
}
_cairo_composite_rectangles_fini (&extents);
return _cairo_output_stream_get_status (surface->output);
cleanup:
_cairo_composite_rectangles_fini (&extents);
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_fill (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_path_fixed_t*path,
cairo_fill_rule_t fill_rule,
double tolerance,
cairo_antialias_t antialias,
const cairo_clip_t *clip)
{
cairo_pdf_surface_t *surface = abstract_surface;
cairo_int_status_t status;
cairo_pdf_smask_group_t *group;
cairo_pdf_resource_t pattern_res, gstate_res;
cairo_composite_rectangles_t extents;
status = _cairo_composite_rectangles_init_for_fill (&extents,
&surface->base,
op, source, path,
clip);
if (unlikely (status))
return status;
/* use the more accurate extents */
if (extents.is_bounded) {
cairo_rectangle_int_t mask;
cairo_box_t box;
_cairo_path_fixed_fill_extents (path,
fill_rule,
tolerance,
&mask);
_cairo_box_from_rectangle (&box, &mask);
status = _cairo_composite_rectangles_intersect_mask_extents (&extents,
&box);
if (unlikely (status))
goto cleanup;
}
status = _cairo_pdf_interchange_add_operation_extents (surface, &extents.bounded);
if (unlikely (status))
goto cleanup;
if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) {
status = _cairo_pdf_surface_analyze_operation (surface, op, source, &extents.bounded);
goto cleanup;
} else if (surface->paginated_mode == CAIRO_PAGINATED_MODE_FALLBACK) {
status = _cairo_pdf_surface_start_fallback (surface);
if (unlikely (status))
goto cleanup;
}
assert (_cairo_pdf_surface_operation_supported (surface, op, source, &extents.bounded));
status = _cairo_pdf_surface_set_clip (surface, &extents);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_surface_select_operator (surface, op);
if (unlikely (status))
goto cleanup;
if (_can_paint_pattern (source)) {
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (unlikely (status))
goto cleanup;
_cairo_output_stream_printf (surface->output, "q\n");
status = _cairo_pdf_operators_clip (&surface->pdf_operators,
path,
fill_rule);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_surface_paint_pattern (surface,
op,
source,
&extents.bounded,
1.0, /* alpha */
FALSE); /* mask */
if (unlikely (status))
goto cleanup;
_cairo_output_stream_printf (surface->output, "Q\n");
status = _cairo_output_stream_get_status (surface->output);
goto cleanup;
}
pattern_res.id = 0;
gstate_res.id = 0;
status = _cairo_pdf_surface_add_pdf_pattern (surface, source, op,
&extents.bounded,
&pattern_res, &gstate_res);
if (unlikely (status))
goto cleanup;
if (gstate_res.id != 0) {
group = _cairo_pdf_surface_create_smask_group (surface, &extents.bounded);
if (unlikely (group == NULL)) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto cleanup;
}
group->operation = PDF_FILL;
status = _cairo_pattern_create_copy (&group->source, source);
if (unlikely (status)) {
_cairo_pdf_smask_group_destroy (group);
goto cleanup;
}
group->source_res = pattern_res;
status = _cairo_path_fixed_init_copy (&group->path, path);
if (unlikely (status)) {
_cairo_pdf_smask_group_destroy (group);
goto cleanup;
}
group->fill_rule = fill_rule;
status = _cairo_pdf_surface_add_smask_group (surface, group);
if (unlikely (status)) {
_cairo_pdf_smask_group_destroy (group);
goto cleanup;
}
status = _cairo_pdf_surface_add_smask (surface, gstate_res);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_surface_add_xobject (surface, group->group_res);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (unlikely (status))
goto cleanup;
_cairo_output_stream_printf (surface->output,
"q /s%d gs /x%d Do Q\n",
gstate_res.id,
group->group_res.id);
} else {
status = _cairo_pdf_surface_select_pattern (surface, source, pattern_res, FALSE);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_operators_fill (&surface->pdf_operators,
path,
fill_rule);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_surface_unselect_pattern (surface);
if (unlikely (status))
goto cleanup;
}
_cairo_composite_rectangles_fini (&extents);
return _cairo_output_stream_get_status (surface->output);
cleanup:
_cairo_composite_rectangles_fini (&extents);
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_fill_stroke (void *abstract_surface,
cairo_operator_t fill_op,
const cairo_pattern_t *fill_source,
cairo_fill_rule_t fill_rule,
double fill_tolerance,
cairo_antialias_t fill_antialias,
const cairo_path_fixed_t*path,
cairo_operator_t stroke_op,
const cairo_pattern_t *stroke_source,
const cairo_stroke_style_t *stroke_style,
const cairo_matrix_t *stroke_ctm,
const cairo_matrix_t *stroke_ctm_inverse,
double stroke_tolerance,
cairo_antialias_t stroke_antialias,
const cairo_clip_t *clip)
{
cairo_pdf_surface_t *surface = abstract_surface;
cairo_int_status_t status;
cairo_pdf_resource_t fill_pattern_res, stroke_pattern_res, gstate_res;
cairo_composite_rectangles_t extents;
/* During analysis we return unsupported and let the _fill and
* _stroke functions that are on the fallback path do the analysis
* for us. During render we may still encounter unsupported
* combinations of fill/stroke patterns. However we can return
* unsupported anytime to let the _fill and _stroke functions take
* over.
*/
if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE)
return CAIRO_INT_STATUS_UNSUPPORTED;
/* PDF rendering of fill-stroke is not the same as cairo when
* either the fill or stroke is not opaque.
*/
if ( !_cairo_pattern_is_opaque (fill_source, NULL) ||
!_cairo_pattern_is_opaque (stroke_source, NULL))
{
return CAIRO_INT_STATUS_UNSUPPORTED;
}
if (fill_op != stroke_op)
return CAIRO_INT_STATUS_UNSUPPORTED;
/* Compute the operation extents using the stroke which will naturally
* be larger than the fill extents.
*/
status = _cairo_composite_rectangles_init_for_stroke (&extents,
&surface->base,
stroke_op, stroke_source,
path, stroke_style, stroke_ctm,
clip);
if (unlikely (status))
return status;
/* use the more accurate extents */
if (extents.is_bounded) {
cairo_rectangle_int_t mask;
cairo_box_t box;
status = _cairo_path_fixed_stroke_extents (path, stroke_style,
stroke_ctm, stroke_ctm_inverse,
stroke_tolerance,
&mask);
if (unlikely (status))
goto cleanup;
_cairo_box_from_rectangle (&box, &mask);
status = _cairo_composite_rectangles_intersect_mask_extents (&extents,
&box);
if (unlikely (status))
goto cleanup;
}
status = _cairo_pdf_surface_set_clip (surface, &extents);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_surface_select_operator (surface, fill_op);
if (unlikely (status))
goto cleanup;
/* use the more accurate extents */
if (extents.is_bounded) {
cairo_rectangle_int_t mask;
cairo_box_t box;
_cairo_path_fixed_fill_extents (path,
fill_rule,
fill_tolerance,
&mask);
_cairo_box_from_rectangle (&box, &mask);
status = _cairo_composite_rectangles_intersect_mask_extents (&extents,
&box);
if (unlikely (status))
goto cleanup;
}
status = _cairo_pdf_interchange_add_operation_extents (surface, &extents.bounded);
if (unlikely (status))
goto cleanup;
fill_pattern_res.id = 0;
gstate_res.id = 0;
status = _cairo_pdf_surface_add_pdf_pattern (surface, fill_source,
fill_op,
&extents.bounded,
&fill_pattern_res,
&gstate_res);
if (unlikely (status))
goto cleanup;
assert (gstate_res.id == 0);
stroke_pattern_res.id = 0;
gstate_res.id = 0;
status = _cairo_pdf_surface_add_pdf_pattern (surface,
stroke_source,
stroke_op,
&extents.bounded,
&stroke_pattern_res,
&gstate_res);
if (unlikely (status))
goto cleanup;
assert (gstate_res.id == 0);
/* As PDF has separate graphics state for fill and stroke we can
* select both at the same time */
status = _cairo_pdf_surface_select_pattern (surface, fill_source,
fill_pattern_res, FALSE);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_surface_select_pattern (surface, stroke_source,
stroke_pattern_res, TRUE);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_operators_fill_stroke (&surface->pdf_operators,
path,
fill_rule,
stroke_style,
stroke_ctm,
stroke_ctm_inverse);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_surface_unselect_pattern (surface);
if (unlikely (status))
goto cleanup;
_cairo_composite_rectangles_fini (&extents);
return _cairo_output_stream_get_status (surface->output);
cleanup:
_cairo_composite_rectangles_fini (&extents);
return status;
}
static cairo_bool_t
_cairo_pdf_surface_has_show_text_glyphs (void *abstract_surface)
{
return TRUE;
}
static cairo_int_status_t
_cairo_pdf_surface_show_text_glyphs (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const char *utf8,
int utf8_len,
cairo_glyph_t *glyphs,
int num_glyphs,
const cairo_text_cluster_t *clusters,
int num_clusters,
cairo_text_cluster_flags_t cluster_flags,
cairo_scaled_font_t *scaled_font,
const cairo_clip_t *clip)
{
cairo_pdf_surface_t *surface = abstract_surface;
cairo_pdf_smask_group_t *group;
cairo_pdf_resource_t pattern_res, gstate_res;
cairo_composite_rectangles_t extents;
cairo_bool_t overlap;
cairo_int_status_t status;
status = _cairo_composite_rectangles_init_for_glyphs (&extents,
&surface->base,
op, source,
scaled_font,
glyphs, num_glyphs,
clip,
&overlap);
if (unlikely (status))
return status;
status = _cairo_pdf_interchange_add_operation_extents (surface, &extents.bounded);
if (unlikely (status))
return status;
if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) {
status = _cairo_pdf_surface_analyze_operation (surface, op, source, &extents.bounded);
goto cleanup;
}
assert (_cairo_pdf_surface_operation_supported (surface, op, source, &extents.bounded));
status = _cairo_pdf_surface_set_clip (surface, &extents);
if (unlikely (status))
goto cleanup;
pattern_res.id = 0;
gstate_res.id = 0;
status = _cairo_pdf_surface_add_pdf_pattern (surface, source, op,
&extents.bounded,
&pattern_res, &gstate_res);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_surface_select_operator (surface, op);
if (unlikely (status))
goto cleanup;
if (gstate_res.id != 0) {
group = _cairo_pdf_surface_create_smask_group (surface, &extents.bounded);
if (unlikely (group == NULL)) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto cleanup;
}
group->operation = PDF_SHOW_GLYPHS;
status = _cairo_pattern_create_copy (&group->source, source);
if (unlikely (status)) {
_cairo_pdf_smask_group_destroy (group);
goto cleanup;
}
group->source_res = pattern_res;
if (utf8_len) {
group->utf8 = _cairo_malloc (utf8_len);
if (unlikely (group->utf8 == NULL)) {
_cairo_pdf_smask_group_destroy (group);
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto cleanup;
}
memcpy (group->utf8, utf8, utf8_len);
}
group->utf8_len = utf8_len;
if (num_glyphs) {
group->glyphs = _cairo_malloc_ab (num_glyphs, sizeof (cairo_glyph_t));
if (unlikely (group->glyphs == NULL)) {
_cairo_pdf_smask_group_destroy (group);
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto cleanup;
}
memcpy (group->glyphs, glyphs, sizeof (cairo_glyph_t) * num_glyphs);
}
group->num_glyphs = num_glyphs;
if (num_clusters) {
group->clusters = _cairo_malloc_ab (num_clusters, sizeof (cairo_text_cluster_t));
if (unlikely (group->clusters == NULL)) {
_cairo_pdf_smask_group_destroy (group);
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto cleanup;
}
memcpy (group->clusters, clusters, sizeof (cairo_text_cluster_t) * num_clusters);
}
group->num_clusters = num_clusters;
group->scaled_font = cairo_scaled_font_reference (scaled_font);
status = _cairo_pdf_surface_add_smask_group (surface, group);
if (unlikely (status)) {
_cairo_pdf_smask_group_destroy (group);
goto cleanup;
}
status = _cairo_pdf_surface_add_smask (surface, gstate_res);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_surface_add_xobject (surface, group->group_res);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (unlikely (status))
goto cleanup;
_cairo_output_stream_printf (surface->output,
"q /s%d gs /x%d Do Q\n",
gstate_res.id,
group->group_res.id);
} else {
status = _cairo_pdf_surface_select_pattern (surface, source, pattern_res, FALSE);
if (unlikely (status))
goto cleanup;
/* Each call to show_glyphs() with a transclucent pattern must
* be in a separate text object otherwise overlapping text
* from separate calls to show_glyphs will not composite with
* each other. */
if (! _cairo_pattern_is_opaque (source, &extents.bounded)) {
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (unlikely (status))
goto cleanup;
}
status = _cairo_pdf_operators_show_text_glyphs (&surface->pdf_operators,
utf8, utf8_len,
glyphs, num_glyphs,
clusters, num_clusters,
cluster_flags,
scaled_font);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_surface_unselect_pattern (surface);
if (unlikely (status))
goto cleanup;
}
_cairo_composite_rectangles_fini (&extents);
return _cairo_output_stream_get_status (surface->output);
cleanup:
_cairo_composite_rectangles_fini (&extents);
return status;
}
static const char **
_cairo_pdf_surface_get_supported_mime_types (void *abstract_surface)
{
return _cairo_pdf_supported_mime_types;
}
static cairo_int_status_t
_cairo_pdf_surface_tag (void *abstract_surface,
cairo_bool_t begin,
const char *tag_name,
const char *attributes)
{
cairo_pdf_surface_t *surface = abstract_surface;
cairo_int_status_t status = 0;
if (begin)
status = _cairo_pdf_interchange_tag_begin (surface, tag_name, attributes);
else
status = _cairo_pdf_interchange_tag_end (surface, tag_name);
return status;
}
static cairo_int_status_t
_cairo_pdf_surface_set_paginated_mode (void *abstract_surface,
cairo_paginated_mode_t paginated_mode)
{
cairo_pdf_surface_t *surface = abstract_surface;
cairo_int_status_t status;
surface->paginated_mode = paginated_mode;
status = _cairo_pdf_interchange_begin_page_content (surface);
if (unlikely (status))
return status;
if (paginated_mode == CAIRO_PAGINATED_MODE_RENDER) {
surface->surface_extents.x = 0;
surface->surface_extents.y = 0;
surface->surface_extents.width = ceil (surface->width);
surface->surface_extents.height = ceil (surface->height);
}
return CAIRO_INT_STATUS_SUCCESS;
}
static const cairo_surface_backend_t cairo_pdf_surface_backend = {
CAIRO_SURFACE_TYPE_PDF,
_cairo_pdf_surface_finish,
_cairo_default_context_create,
NULL, /* create similar: handled by wrapper */
NULL, /* create similar image */
NULL, /* map to image */
NULL, /* unmap image */
_cairo_surface_default_source,
NULL, /* acquire_source_image */
NULL, /* release_source_image */
NULL, /* snapshot */
NULL, /* _cairo_pdf_surface_copy_page */
_cairo_pdf_surface_show_page,
_cairo_pdf_surface_get_extents,
_cairo_pdf_surface_get_font_options,
NULL, /* flush */
NULL, /* mark_dirty_rectangle */
/* Here are the drawing functions */
_cairo_pdf_surface_paint,
_cairo_pdf_surface_mask,
_cairo_pdf_surface_stroke,
_cairo_pdf_surface_fill,
_cairo_pdf_surface_fill_stroke,
NULL, /* show_glyphs */
_cairo_pdf_surface_has_show_text_glyphs,
_cairo_pdf_surface_show_text_glyphs,
_cairo_pdf_surface_get_supported_mime_types,
_cairo_pdf_surface_tag,
};
static const cairo_paginated_surface_backend_t
cairo_pdf_surface_paginated_backend = {
_cairo_pdf_surface_start_page,
_cairo_pdf_surface_set_paginated_mode,
NULL, /* set_bounding_box */
_cairo_pdf_surface_has_fallback_images,
_cairo_pdf_surface_supports_fine_grained_fallbacks,
_cairo_pdf_surface_requires_thumbnail_image,
_cairo_pdf_surface_set_thumbnail_image,
};