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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 © 2005 Red Hat, Inc
*
* 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 Red Hat, Inc.
*
* Contributor(s):
*/
#define WIN32_LEAN_AND_MEAN
/* We require Windows 2000 features such as GetGlyphIndices */
#if !defined(WINVER) || (WINVER < 0x0500)
# define WINVER 0x0500
#endif
#if !defined(_WIN32_WINNT) || (_WIN32_WINNT < 0x0500)
# define _WIN32_WINNT 0x0500
#endif
#include "cairoint.h"
#include "cairo-win32-private.h"
#include "cairo-error-private.h"
#include <wchar.h>
#ifndef SPI_GETFONTSMOOTHINGTYPE
#define SPI_GETFONTSMOOTHINGTYPE 0x200a
#endif
#ifndef FE_FONTSMOOTHINGCLEARTYPE
#define FE_FONTSMOOTHINGCLEARTYPE 2
#endif
#ifndef CLEARTYPE_QUALITY
#define CLEARTYPE_QUALITY 5
#endif
#ifndef TT_PRIM_CSPLINE
#define TT_PRIM_CSPLINE 3
#endif
#define CMAP_TAG 0x70616d63
/**
* SECTION:cairo-win32-fonts
* @Title: Win32 Fonts
* @Short_Description: Font support for Microsoft Windows
* @See_Also: #cairo_font_face_t
*
* The Microsoft Windows font backend is primarily used to render text on
* Microsoft Windows systems.
*/
/**
* CAIRO_HAS_WIN32_FONT:
*
* Defined if the Microsoft Windows font backend is available.
* This macro can be used to conditionally compile backend-specific code.
*/
const cairo_scaled_font_backend_t _cairo_win32_scaled_font_backend;
typedef struct {
cairo_scaled_font_t base;
LOGFONTW logfont;
BYTE quality;
/* We do drawing and metrics computation in a "logical space" which
* is similar to font space, except that it is scaled by a factor
* of the (desired font size) * (WIN32_FONT_LOGICAL_SCALE). The multiplication
* by WIN32_FONT_LOGICAL_SCALE allows for sub-pixel precision.
*/
double logical_scale;
/* The size we should actually request the font at from Windows; differs
* from the logical_scale because it is quantized for orthogonal
* transformations
*/
double logical_size;
/* Transformations from device <=> logical space
*/
cairo_matrix_t logical_to_device;
cairo_matrix_t device_to_logical;
/* We special case combinations of 90-degree-rotations, scales and
* flips ... that is transformations that take the axes to the
* axes. If preserve_axes is true, then swap_axes/swap_x/swap_y
* encode the 8 possibilities for orientation (4 rotation angles with
* and without a flip), and scale_x, scale_y the scale components.
*/
cairo_bool_t preserve_axes;
cairo_bool_t swap_axes;
cairo_bool_t swap_x;
cairo_bool_t swap_y;
double x_scale;
double y_scale;
/* The size of the design unit of the font
*/
int em_square;
HFONT scaled_hfont;
HFONT unscaled_hfont;
cairo_bool_t is_bitmap;
cairo_bool_t is_type1;
cairo_bool_t delete_scaled_hfont;
} cairo_win32_scaled_font_t;
static cairo_status_t
_cairo_win32_scaled_font_set_metrics (cairo_win32_scaled_font_t *scaled_font);
static cairo_status_t
_cairo_win32_scaled_font_init_glyph_metrics (cairo_win32_scaled_font_t *scaled_font,
cairo_scaled_glyph_t *scaled_glyph);
static cairo_status_t
_cairo_win32_scaled_font_init_glyph_surface (cairo_win32_scaled_font_t *scaled_font,
cairo_scaled_glyph_t *scaled_glyph);
static cairo_status_t
_cairo_win32_scaled_font_init_glyph_path (cairo_win32_scaled_font_t *scaled_font,
cairo_scaled_glyph_t *scaled_glyph);
#define NEARLY_ZERO(d) (fabs(d) < (1. / 65536.))
static HDC
_get_global_font_dc (void)
{
static HDC hdc;
if (!hdc) {
hdc = CreateCompatibleDC (NULL);
if (!hdc) {
_cairo_win32_print_gdi_error ("_get_global_font_dc");
return NULL;
}
if (!SetGraphicsMode (hdc, GM_ADVANCED)) {
_cairo_win32_print_gdi_error ("_get_global_font_dc");
DeleteDC (hdc);
return NULL;
}
}
return hdc;
}
static cairo_status_t
_compute_transform (cairo_win32_scaled_font_t *scaled_font,
cairo_matrix_t *sc)
{
cairo_status_t status;
if (NEARLY_ZERO (sc->yx) && NEARLY_ZERO (sc->xy) &&
!NEARLY_ZERO(sc->xx) && !NEARLY_ZERO(sc->yy)) {
scaled_font->preserve_axes = TRUE;
scaled_font->x_scale = sc->xx;
scaled_font->swap_x = (sc->xx < 0);
scaled_font->y_scale = sc->yy;
scaled_font->swap_y = (sc->yy < 0);
scaled_font->swap_axes = FALSE;
} else if (NEARLY_ZERO (sc->xx) && NEARLY_ZERO (sc->yy) &&
!NEARLY_ZERO(sc->yx) && !NEARLY_ZERO(sc->xy)) {
scaled_font->preserve_axes = TRUE;
scaled_font->x_scale = sc->yx;
scaled_font->swap_x = (sc->yx < 0);
scaled_font->y_scale = sc->xy;
scaled_font->swap_y = (sc->xy < 0);
scaled_font->swap_axes = TRUE;
} else {
scaled_font->preserve_axes = FALSE;
scaled_font->swap_x = scaled_font->swap_y = scaled_font->swap_axes = FALSE;
}
if (scaled_font->preserve_axes) {
if (scaled_font->swap_x)
scaled_font->x_scale = - scaled_font->x_scale;
if (scaled_font->swap_y)
scaled_font->y_scale = - scaled_font->y_scale;
scaled_font->logical_scale = WIN32_FONT_LOGICAL_SCALE * scaled_font->y_scale;
scaled_font->logical_size = WIN32_FONT_LOGICAL_SCALE *
_cairo_lround (scaled_font->y_scale);
}
/* The font matrix has x and y "scale" components which we extract and
* use as character scale values.
*/
cairo_matrix_init (&scaled_font->logical_to_device,
sc->xx, sc->yx, sc->xy, sc->yy, 0, 0);
if (!scaled_font->preserve_axes) {
status = _cairo_matrix_compute_basis_scale_factors (&scaled_font->logical_to_device,
&scaled_font->x_scale, &scaled_font->y_scale,
TRUE); /* XXX: Handle vertical text */
if (status)
return status;
scaled_font->logical_size = _cairo_lround (WIN32_FONT_LOGICAL_SCALE *
scaled_font->y_scale);
scaled_font->logical_scale = WIN32_FONT_LOGICAL_SCALE * scaled_font->y_scale;
}
cairo_matrix_scale (&scaled_font->logical_to_device,
1.0 / scaled_font->logical_scale, 1.0 / scaled_font->logical_scale);
scaled_font->device_to_logical = scaled_font->logical_to_device;
status = cairo_matrix_invert (&scaled_font->device_to_logical);
if (status)
cairo_matrix_init_identity (&scaled_font->device_to_logical);
return CAIRO_STATUS_SUCCESS;
}
static cairo_bool_t
_have_cleartype_quality (void)
{
OSVERSIONINFO version_info;
version_info.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
if (!GetVersionEx (&version_info)) {
_cairo_win32_print_gdi_error ("_have_cleartype_quality");
return FALSE;
}
return (version_info.dwMajorVersion > 5 ||
(version_info.dwMajorVersion == 5 &&
version_info.dwMinorVersion >= 1)); /* XP or newer */
}
BYTE
cairo_win32_get_system_text_quality (void)
{
BOOL font_smoothing;
UINT smoothing_type;
if (!SystemParametersInfo (SPI_GETFONTSMOOTHING, 0, &font_smoothing, 0)) {
_cairo_win32_print_gdi_error ("_cairo_win32_get_system_text_quality");
return DEFAULT_QUALITY;
}
if (font_smoothing) {
if (_have_cleartype_quality ()) {
if (!SystemParametersInfo (SPI_GETFONTSMOOTHINGTYPE,
0, &smoothing_type, 0)) {
_cairo_win32_print_gdi_error ("_cairo_win32_get_system_text_quality");
return DEFAULT_QUALITY;
}
if (smoothing_type == FE_FONTSMOOTHINGCLEARTYPE)
return CLEARTYPE_QUALITY;
}
return ANTIALIASED_QUALITY;
} else {
return DEFAULT_QUALITY;
}
}
/* If face_hfont is non-%NULL then font_matrix must be a simple scale by some
* factor S, ctm must be the identity, logfont->lfHeight must be -S,
* logfont->lfWidth, logfont->lfEscapement, logfont->lfOrientation must
* all be 0, and face_hfont is the result of calling CreateFontIndirectW on
* logfont.
*/
static cairo_status_t
_win32_scaled_font_create (LOGFONTW *logfont,
HFONT face_hfont,
cairo_font_face_t *font_face,
const cairo_matrix_t *font_matrix,
const cairo_matrix_t *ctm,
const cairo_font_options_t *options,
cairo_scaled_font_t **font_out)
{
HDC hdc;
cairo_win32_scaled_font_t *f;
cairo_matrix_t scale;
cairo_status_t status;
hdc = _get_global_font_dc ();
if (hdc == NULL)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
f = malloc (sizeof(cairo_win32_scaled_font_t));
if (f == NULL)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
f->logfont = *logfont;
/* We don't have any control over the hinting style or subpixel
* order in the Win32 font API, so we ignore those parts of
* cairo_font_options_t. We use the 'antialias' field to set
* the 'quality'.
*
* XXX: The other option we could pay attention to, but don't
* here is the hint_metrics options.
*/
if (options->antialias == CAIRO_ANTIALIAS_DEFAULT)
f->quality = cairo_win32_get_system_text_quality ();
else {
switch (options->antialias) {
case CAIRO_ANTIALIAS_NONE:
f->quality = NONANTIALIASED_QUALITY;
break;
case CAIRO_ANTIALIAS_GRAY:
f->quality = ANTIALIASED_QUALITY;
break;
case CAIRO_ANTIALIAS_SUBPIXEL:
if (_have_cleartype_quality ())
f->quality = CLEARTYPE_QUALITY;
else
f->quality = ANTIALIASED_QUALITY;
break;
case CAIRO_ANTIALIAS_DEFAULT:
ASSERT_NOT_REACHED;
}
}
f->em_square = 0;
f->scaled_hfont = NULL;
f->unscaled_hfont = NULL;
if (f->quality == logfont->lfQuality ||
(logfont->lfQuality == DEFAULT_QUALITY &&
options->antialias == CAIRO_ANTIALIAS_DEFAULT)) {
/* If face_hfont is non-NULL, then we can use it to avoid creating our
* own --- because the constraints on face_hfont mentioned above
* guarantee it was created in exactly the same way that
* _win32_scaled_font_get_scaled_hfont would create it.
*/
f->scaled_hfont = face_hfont;
}
/* don't delete the hfont if we're using the one passed in to us */
f->delete_scaled_hfont = !f->scaled_hfont;
cairo_matrix_multiply (&scale, font_matrix, ctm);
status = _compute_transform (f, &scale);
if (status)
goto FAIL;
status = _cairo_scaled_font_init (&f->base, font_face,
font_matrix, ctm, options,
&_cairo_win32_scaled_font_backend);
if (status)
goto FAIL;
status = _cairo_win32_scaled_font_set_metrics (f);
if (status) {
_cairo_scaled_font_fini (&f->base);
goto FAIL;
}
*font_out = &f->base;
return CAIRO_STATUS_SUCCESS;
FAIL:
free (f);
return status;
}
static cairo_status_t
_win32_scaled_font_set_world_transform (cairo_win32_scaled_font_t *scaled_font,
HDC hdc)
{
XFORM xform;
_cairo_matrix_to_win32_xform (&scaled_font->logical_to_device, &xform);
if (!SetWorldTransform (hdc, &xform))
return _cairo_win32_print_gdi_error ("_win32_scaled_font_set_world_transform");
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_win32_scaled_font_set_identity_transform (HDC hdc)
{
if (!ModifyWorldTransform (hdc, NULL, MWT_IDENTITY))
return _cairo_win32_print_gdi_error ("_win32_scaled_font_set_identity_transform");
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_win32_scaled_font_get_scaled_hfont (cairo_win32_scaled_font_t *scaled_font,
HFONT *hfont_out)
{
if (!scaled_font->scaled_hfont) {
LOGFONTW logfont = scaled_font->logfont;
logfont.lfHeight = -scaled_font->logical_size;
logfont.lfWidth = 0;
logfont.lfEscapement = 0;
logfont.lfOrientation = 0;
logfont.lfQuality = scaled_font->quality;
scaled_font->scaled_hfont = CreateFontIndirectW (&logfont);
if (!scaled_font->scaled_hfont)
return _cairo_win32_print_gdi_error ("_win32_scaled_font_get_scaled_hfont");
}
*hfont_out = scaled_font->scaled_hfont;
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_win32_scaled_font_get_unscaled_hfont (cairo_win32_scaled_font_t *scaled_font,
HDC hdc,
HFONT *hfont_out)
{
if (scaled_font->unscaled_hfont == NULL) {
OUTLINETEXTMETRIC *otm;
unsigned int otm_size;
HFONT scaled_hfont;
LOGFONTW logfont;
cairo_status_t status;
status = _win32_scaled_font_get_scaled_hfont (scaled_font,
&scaled_hfont);
if (status)
return status;
if (! SelectObject (hdc, scaled_hfont))
return _cairo_win32_print_gdi_error ("_win32_scaled_font_get_unscaled_hfont:SelectObject");
otm_size = GetOutlineTextMetrics (hdc, 0, NULL);
if (! otm_size)
return _cairo_win32_print_gdi_error ("_win32_scaled_font_get_unscaled_hfont:GetOutlineTextMetrics");
otm = malloc (otm_size);
if (otm == NULL)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
if (! GetOutlineTextMetrics (hdc, otm_size, otm)) {
status = _cairo_win32_print_gdi_error ("_win32_scaled_font_get_unscaled_hfont:GetOutlineTextMetrics");
free (otm);
return status;
}
scaled_font->em_square = otm->otmEMSquare;
free (otm);
logfont = scaled_font->logfont;
logfont.lfHeight = -scaled_font->em_square;
logfont.lfWidth = 0;
logfont.lfEscapement = 0;
logfont.lfOrientation = 0;
logfont.lfQuality = scaled_font->quality;
scaled_font->unscaled_hfont = CreateFontIndirectW (&logfont);
if (! scaled_font->unscaled_hfont)
return _cairo_win32_print_gdi_error ("_win32_scaled_font_get_unscaled_hfont:CreateIndirect");
}
*hfont_out = scaled_font->unscaled_hfont;
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_win32_scaled_font_select_unscaled_font (cairo_scaled_font_t *scaled_font,
HDC hdc)
{
cairo_status_t status;
HFONT hfont;
HFONT old_hfont = NULL;
status = _win32_scaled_font_get_unscaled_hfont ((cairo_win32_scaled_font_t *)scaled_font, hdc, &hfont);
if (status)
return status;
old_hfont = SelectObject (hdc, hfont);
if (!old_hfont)
return _cairo_win32_print_gdi_error ("_cairo_win32_scaled_font_select_unscaled_font");
status = _win32_scaled_font_set_identity_transform (hdc);
if (status) {
SelectObject (hdc, old_hfont);
return status;
}
SetMapMode (hdc, MM_TEXT);
return CAIRO_STATUS_SUCCESS;
}
cairo_bool_t
_cairo_win32_scaled_font_is_type1 (cairo_scaled_font_t *scaled_font)
{
cairo_win32_scaled_font_t *win32_scaled_font;
win32_scaled_font = (cairo_win32_scaled_font_t *) scaled_font;
return win32_scaled_font->is_type1;
}
cairo_bool_t
_cairo_win32_scaled_font_is_bitmap (cairo_scaled_font_t *scaled_font)
{
cairo_win32_scaled_font_t *win32_scaled_font;
win32_scaled_font = (cairo_win32_scaled_font_t *) scaled_font;
return win32_scaled_font->is_bitmap;
}
static void
_cairo_win32_scaled_font_done_unscaled_font (cairo_scaled_font_t *scaled_font)
{
}
/* implement the font backend interface */
static cairo_status_t
_cairo_win32_font_face_create_for_toy (cairo_toy_font_face_t *toy_face,
cairo_font_face_t **font_face)
{
LOGFONTW logfont;
uint16_t *face_name;
int face_name_len;
cairo_status_t status;
status = _cairo_utf8_to_utf16 (toy_face->family, -1,
&face_name, &face_name_len);
if (status)
return status;
if (face_name_len > LF_FACESIZE - 1)
face_name_len = LF_FACESIZE - 1;
memcpy (logfont.lfFaceName, face_name, sizeof (uint16_t) * face_name_len);
logfont.lfFaceName[face_name_len] = 0;
free (face_name);
logfont.lfHeight = 0; /* filled in later */
logfont.lfWidth = 0; /* filled in later */
logfont.lfEscapement = 0; /* filled in later */
logfont.lfOrientation = 0; /* filled in later */
switch (toy_face->weight) {
case CAIRO_FONT_WEIGHT_NORMAL:
default:
logfont.lfWeight = FW_NORMAL;
break;
case CAIRO_FONT_WEIGHT_BOLD:
logfont.lfWeight = FW_BOLD;
break;
}
switch (toy_face->slant) {
case CAIRO_FONT_SLANT_NORMAL:
default:
logfont.lfItalic = FALSE;
break;
case CAIRO_FONT_SLANT_ITALIC:
case CAIRO_FONT_SLANT_OBLIQUE:
logfont.lfItalic = TRUE;
break;
}
logfont.lfUnderline = FALSE;
logfont.lfStrikeOut = FALSE;
/* The docs for LOGFONT discourage using this, since the
* interpretation is locale-specific, but it's not clear what
* would be a better alternative.
*/
logfont.lfCharSet = DEFAULT_CHARSET;
logfont.lfOutPrecision = OUT_DEFAULT_PRECIS;
logfont.lfClipPrecision = CLIP_DEFAULT_PRECIS;
logfont.lfQuality = DEFAULT_QUALITY; /* filled in later */
logfont.lfPitchAndFamily = DEFAULT_PITCH | FF_DONTCARE;
*font_face = cairo_win32_font_face_create_for_logfontw (&logfont);
return CAIRO_STATUS_SUCCESS;
}
static void
_cairo_win32_scaled_font_fini (void *abstract_font)
{
cairo_win32_scaled_font_t *scaled_font = abstract_font;
if (scaled_font == NULL)
return;
if (scaled_font->scaled_hfont && scaled_font->delete_scaled_hfont)
DeleteObject (scaled_font->scaled_hfont);
if (scaled_font->unscaled_hfont)
DeleteObject (scaled_font->unscaled_hfont);
}
static cairo_int_status_t
_cairo_win32_scaled_font_type1_text_to_glyphs (cairo_win32_scaled_font_t *scaled_font,
double x,
double y,
const char *utf8,
cairo_glyph_t **glyphs,
int *num_glyphs)
{
uint16_t *utf16;
int n16;
int i;
WORD *glyph_indices = NULL;
cairo_status_t status;
double x_pos, y_pos;
HDC hdc = NULL;
cairo_matrix_t mat;
status = _cairo_utf8_to_utf16 (utf8, -1, &utf16, &n16);
if (status)
return status;
glyph_indices = _cairo_malloc_ab (n16 + 1, sizeof (WORD));
if (!glyph_indices) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto FAIL1;
}
hdc = _get_global_font_dc ();
assert (hdc != NULL);
status = cairo_win32_scaled_font_select_font (&scaled_font->base, hdc);
if (status)
goto FAIL2;
if (GetGlyphIndicesW (hdc, utf16, n16, glyph_indices, 0) == GDI_ERROR) {
status = _cairo_win32_print_gdi_error ("_cairo_win32_scaled_font_type1_text_to_glyphs:GetGlyphIndicesW");
goto FAIL3;
}
*num_glyphs = n16;
*glyphs = _cairo_malloc_ab (n16, sizeof (cairo_glyph_t));
if (!*glyphs) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto FAIL3;
}
x_pos = x;
y_pos = y;
mat = scaled_font->base.ctm;
status = cairo_matrix_invert (&mat);
assert (status == CAIRO_STATUS_SUCCESS);
_cairo_scaled_font_freeze_cache (&scaled_font->base);
for (i = 0; i < n16; i++) {
cairo_scaled_glyph_t *scaled_glyph;
(*glyphs)[i].index = glyph_indices[i];
(*glyphs)[i].x = x_pos;
(*glyphs)[i].y = y_pos;
status = _cairo_scaled_glyph_lookup (&scaled_font->base,
glyph_indices[i],
CAIRO_SCALED_GLYPH_INFO_METRICS,
&scaled_glyph);
if (status) {
free (*glyphs);
*glyphs = NULL;
break;
}
x = scaled_glyph->x_advance;
y = scaled_glyph->y_advance;
cairo_matrix_transform_distance (&mat, &x, &y);
x_pos += x;
y_pos += y;
}
_cairo_scaled_font_thaw_cache (&scaled_font->base);
FAIL3:
cairo_win32_scaled_font_done_font (&scaled_font->base);
FAIL2:
free (glyph_indices);
FAIL1:
free (utf16);
return status;
}
static cairo_int_status_t
_cairo_win32_scaled_font_text_to_glyphs (void *abstract_font,
double x,
double y,
const char *utf8,
cairo_glyph_t **glyphs,
int *num_glyphs)
{
cairo_win32_scaled_font_t *scaled_font = abstract_font;
uint16_t *utf16;
int n16;
GCP_RESULTSW gcp_results;
unsigned int buffer_size, i;
WCHAR *glyph_indices = NULL;
int *dx = NULL;
cairo_status_t status;
double x_pos, y_pos;
double x_incr, y_incr;
HDC hdc = NULL;
/* GetCharacterPlacement() returns utf16 instead of glyph indices
* for Type 1 fonts. Use GetGlyphIndices for Type 1 fonts. */
if (scaled_font->is_type1)
return _cairo_win32_scaled_font_type1_text_to_glyphs (scaled_font,
x,
y,
utf8,
glyphs,
num_glyphs);
/* Compute a vector in user space along the baseline of length one logical space unit */
x_incr = 1;
y_incr = 0;
cairo_matrix_transform_distance (&scaled_font->base.font_matrix, &x_incr, &y_incr);
x_incr /= scaled_font->logical_scale;
y_incr /= scaled_font->logical_scale;
status = _cairo_utf8_to_utf16 (utf8, -1, &utf16, &n16);
if (status)
return status;
gcp_results.lStructSize = sizeof (GCP_RESULTS);
gcp_results.lpOutString = NULL;
gcp_results.lpOrder = NULL;
gcp_results.lpCaretPos = NULL;
gcp_results.lpClass = NULL;
buffer_size = MAX (n16 * 1.2, 16); /* Initially guess number of chars plus a few */
if (buffer_size > INT_MAX) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto FAIL1;
}
hdc = _get_global_font_dc ();
assert (hdc != NULL);
status = cairo_win32_scaled_font_select_font (&scaled_font->base, hdc);
if (status)
goto FAIL1;
while (TRUE) {
if (glyph_indices) {
free (glyph_indices);
glyph_indices = NULL;
}
if (dx) {
free (dx);
dx = NULL;
}
glyph_indices = _cairo_malloc_ab (buffer_size, sizeof (WCHAR));
dx = _cairo_malloc_ab (buffer_size, sizeof (int));
if (!glyph_indices || !dx) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto FAIL2;
}
gcp_results.nGlyphs = buffer_size;
gcp_results.lpDx = dx;
gcp_results.lpGlyphs = glyph_indices;
if (!GetCharacterPlacementW (hdc, utf16, n16,
0,
&gcp_results,
GCP_DIACRITIC | GCP_LIGATE | GCP_GLYPHSHAPE | GCP_REORDER)) {
status = _cairo_win32_print_gdi_error ("_cairo_win32_scaled_font_text_to_glyphs");
goto FAIL2;
}
if (gcp_results.lpDx && gcp_results.lpGlyphs)
break;
/* Too small a buffer, try again */
buffer_size += buffer_size / 2;
if (buffer_size > INT_MAX) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto FAIL2;
}
}
*num_glyphs = gcp_results.nGlyphs;
*glyphs = _cairo_malloc_ab (gcp_results.nGlyphs, sizeof (cairo_glyph_t));
if (!*glyphs) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto FAIL2;
}
x_pos = x;
y_pos = y;
for (i = 0; i < gcp_results.nGlyphs; i++) {
(*glyphs)[i].index = glyph_indices[i];
(*glyphs)[i].x = x_pos ;
(*glyphs)[i].y = y_pos;
x_pos += x_incr * dx[i];
y_pos += y_incr * dx[i];
}
FAIL2:
if (glyph_indices)
free (glyph_indices);
if (dx)
free (dx);
cairo_win32_scaled_font_done_font (&scaled_font->base);
FAIL1:
free (utf16);
return status;
}
static unsigned long
_cairo_win32_scaled_font_ucs4_to_index (void *abstract_font,
uint32_t ucs4)
{
cairo_win32_scaled_font_t *scaled_font = abstract_font;
wchar_t unicode[2];
WORD glyph_index;
HDC hdc = NULL;
cairo_status_t status;
hdc = _get_global_font_dc ();
assert (hdc != NULL);
status = cairo_win32_scaled_font_select_font (&scaled_font->base, hdc);
if (status)
return 0;
unicode[0] = ucs4;
unicode[1] = 0;
if (GetGlyphIndicesW (hdc, unicode, 1, &glyph_index, 0) == GDI_ERROR) {
_cairo_win32_print_gdi_error ("_cairo_win32_scaled_font_ucs4_to_index:GetGlyphIndicesW");
glyph_index = 0;
}
cairo_win32_scaled_font_done_font (&scaled_font->base);
return glyph_index;
}
static cairo_status_t
_cairo_win32_scaled_font_set_metrics (cairo_win32_scaled_font_t *scaled_font)
{
cairo_status_t status;
cairo_font_extents_t extents;
TEXTMETRIC metrics;
HDC hdc;
hdc = _get_global_font_dc ();
assert (hdc != NULL);
if (scaled_font->preserve_axes || scaled_font->base.options.hint_metrics == CAIRO_HINT_METRICS_OFF) {
/* For 90-degree rotations (including 0), we get the metrics
* from the GDI in logical space, then convert back to font space
*/
status = cairo_win32_scaled_font_select_font (&scaled_font->base, hdc);
if (status)
return status;
GetTextMetrics (hdc, &metrics);
cairo_win32_scaled_font_done_font (&scaled_font->base);
extents.ascent = metrics.tmAscent / scaled_font->logical_scale;
extents.descent = metrics.tmDescent / scaled_font->logical_scale;
extents.height = (metrics.tmHeight + metrics.tmExternalLeading) / scaled_font->logical_scale;
extents.max_x_advance = metrics.tmMaxCharWidth / scaled_font->logical_scale;
extents.max_y_advance = 0;
} else {
/* For all other transformations, we use the design metrics
* of the font. The GDI results from GetTextMetrics() on a
* transformed font are inexplicably large and we want to
* avoid them.
*/
status = _cairo_win32_scaled_font_select_unscaled_font (&scaled_font->base, hdc);
if (status)
return status;
GetTextMetrics (hdc, &metrics);
_cairo_win32_scaled_font_done_unscaled_font (&scaled_font->base);
extents.ascent = (double)metrics.tmAscent / scaled_font->em_square;
extents.descent = (double)metrics.tmDescent / scaled_font->em_square;
extents.height = (double)(metrics.tmHeight + metrics.tmExternalLeading) / scaled_font->em_square;
extents.max_x_advance = (double)(metrics.tmMaxCharWidth) / scaled_font->em_square;
extents.max_y_advance = 0;
}
scaled_font->is_bitmap = !(metrics.tmPitchAndFamily & TMPF_VECTOR);
/* Need to determine if this is a Type 1 font for the special
* handling in _text_to_glyphs. Unlike TrueType or OpenType,
* Type1 fonts do not have a "cmap" table (or any other table).
* However GetFontData() will retrieve a Type1 font when
* requesting that GetFontData() retrieve data from the start of
* the file. This is to distinguish Type1 from stroke fonts such
* as "Script" and "Modern". The TMPF_TRUETYPE test is redundant
* but improves performance for the most common fonts.
*/
scaled_font->is_type1 = FALSE;
if (!(metrics.tmPitchAndFamily & TMPF_TRUETYPE) &&
(metrics.tmPitchAndFamily & TMPF_VECTOR))
{
if ((GetFontData (hdc, CMAP_TAG, 0, NULL, 0) == GDI_ERROR) &&
(GetFontData (hdc, 0, 0, NULL, 0) != GDI_ERROR))
{
scaled_font->is_type1 = TRUE;
}
}
return _cairo_scaled_font_set_metrics (&scaled_font->base, &extents);
}
static cairo_status_t
_cairo_win32_scaled_font_init_glyph_metrics (cairo_win32_scaled_font_t *scaled_font,
cairo_scaled_glyph_t *scaled_glyph)
{
static const MAT2 matrix = { { 0, 1 }, { 0, 0 }, { 0, 0 }, { 0, 1 } };
GLYPHMETRICS metrics;
cairo_status_t status;
cairo_text_extents_t extents;
HDC hdc;
hdc = _get_global_font_dc ();
assert (hdc != NULL);
if (scaled_font->is_bitmap) {
/* GetGlyphOutline will not work. Assume that the glyph does not extend outside the font box. */
cairo_font_extents_t font_extents;
INT width = 0;
UINT charIndex = _cairo_scaled_glyph_index (scaled_glyph);
cairo_scaled_font_extents (&scaled_font->base, &font_extents);
status = cairo_win32_scaled_font_select_font (&scaled_font->base, hdc);
if (status)
return status;
if (!GetCharWidth32(hdc, charIndex, charIndex, &width)) {
status = _cairo_win32_print_gdi_error ("_cairo_win32_scaled_font_init_glyph_metrics:GetCharWidth32");
width = 0;
}
cairo_win32_scaled_font_done_font (&scaled_font->base);
if (status)
return status;
extents.x_bearing = 0;
extents.y_bearing = scaled_font->base.ctm.yy * (-font_extents.ascent / scaled_font->y_scale);
extents.width = width / (WIN32_FONT_LOGICAL_SCALE * scaled_font->x_scale);
extents.height = scaled_font->base.ctm.yy * (font_extents.ascent + font_extents.descent) / scaled_font->y_scale;
extents.x_advance = extents.width;
extents.y_advance = 0;
} else if (scaled_font->preserve_axes && scaled_font->base.options.hint_metrics != CAIRO_HINT_METRICS_OFF) {
/* If we aren't rotating / skewing the axes, then we get the metrics
* from the GDI in device space and convert to font space.
*/
status = cairo_win32_scaled_font_select_font (&scaled_font->base, hdc);
if (status)
return status;
if (GetGlyphOutlineW (hdc, _cairo_scaled_glyph_index (scaled_glyph),
GGO_METRICS | GGO_GLYPH_INDEX,
&metrics, 0, NULL, &matrix) == GDI_ERROR) {
memset (&metrics, 0, sizeof (GLYPHMETRICS));
} else {
if (metrics.gmBlackBoxX == 1 && metrics.gmBlackBoxY == 1 &&
GetGlyphOutlineW (hdc,
_cairo_scaled_glyph_index (scaled_glyph),
GGO_NATIVE | GGO_GLYPH_INDEX,
&metrics, 0, NULL, &matrix) == 0) {
/* Workaround for GetGlyphOutline returning 1x1 bounding box
* for <space> glyph that is in fact empty.
*/
metrics.gmBlackBoxX = metrics.gmBlackBoxY = 0;
}
else if (metrics.gmBlackBoxX > 0 &&
scaled_font->base.options.antialias != CAIRO_ANTIALIAS_NONE) {
/* The bounding box reported by Windows supposedly contains the glyph's "black" area;
* however, antialiasing (especially with ClearType) means that the actual image that
* needs to be rendered may "bleed" into the adjacent pixels, mainly on the right side.
* To avoid clipping the glyphs when drawn by _cairo_surface_fallback_show_glyphs,
* for example, or other code that uses glyph extents to determine the area to update,
* we add a pixel of "slop" to left side of the nominal "black" area returned by GDI,
* and two pixels to the right (as tests show some glyphs bleed into this column).
*/
metrics.gmptGlyphOrigin.x -= 1;
metrics.gmBlackBoxX += 3;
}
}
cairo_win32_scaled_font_done_font (&scaled_font->base);
if (scaled_font->swap_axes) {
extents.x_bearing = - metrics.gmptGlyphOrigin.y / scaled_font->y_scale;
extents.y_bearing = metrics.gmptGlyphOrigin.x / scaled_font->x_scale;
extents.width = metrics.gmBlackBoxY / scaled_font->y_scale;
extents.height = metrics.gmBlackBoxX / scaled_font->x_scale;
extents.x_advance = metrics.gmCellIncY / scaled_font->x_scale;
extents.y_advance = metrics.gmCellIncX / scaled_font->y_scale;
} else {
extents.x_bearing = metrics.gmptGlyphOrigin.x / scaled_font->x_scale;
extents.y_bearing = - metrics.gmptGlyphOrigin.y / scaled_font->y_scale;
extents.width = metrics.gmBlackBoxX / scaled_font->x_scale;
extents.height = metrics.gmBlackBoxY / scaled_font->y_scale;
extents.x_advance = metrics.gmCellIncX / scaled_font->x_scale;
extents.y_advance = metrics.gmCellIncY / scaled_font->y_scale;
}
if (scaled_font->swap_x) {
extents.x_bearing = (- extents.x_bearing - extents.width);
extents.x_advance = - extents.x_advance;
}
if (scaled_font->swap_y) {
extents.y_bearing = (- extents.y_bearing - extents.height);
extents.y_advance = - extents.y_advance;
}
} else {
/* For all other transformations, we use the design metrics
* of the font.
*/
status = _cairo_win32_scaled_font_select_unscaled_font (&scaled_font->base, hdc);
if (status)
return status;
if (GetGlyphOutlineW (hdc, _cairo_scaled_glyph_index (scaled_glyph),
GGO_METRICS | GGO_GLYPH_INDEX,
&metrics, 0, NULL, &matrix) == GDI_ERROR) {
memset (&metrics, 0, sizeof (GLYPHMETRICS));
}
_cairo_win32_scaled_font_done_unscaled_font (&scaled_font->base);
extents.x_bearing = (double)metrics.gmptGlyphOrigin.x / scaled_font->em_square;
extents.y_bearing = - (double)metrics.gmptGlyphOrigin.y / scaled_font->em_square;
extents.width = (double)metrics.gmBlackBoxX / scaled_font->em_square;
extents.height = (double)metrics.gmBlackBoxY / scaled_font->em_square;
extents.x_advance = (double)metrics.gmCellIncX / scaled_font->em_square;
extents.y_advance = (double)metrics.gmCellIncY / scaled_font->em_square;
}
_cairo_scaled_glyph_set_metrics (scaled_glyph,
&scaled_font->base,
&extents);
return CAIRO_STATUS_SUCCESS;
}
/* Not currently used code, but may be useful in the future if we add
* back the capability to the scaled font backend interface to get the
* actual device space bbox rather than computing it from the
* font-space metrics.
*/
#if 0
static cairo_status_t
_cairo_win32_scaled_font_glyph_bbox (void *abstract_font,
const cairo_glyph_t *glyphs,
int num_glyphs,
cairo_box_t *bbox)
{
static const MAT2 matrix = { { 0, 1 }, { 0, 0 }, { 0, 0 }, { 0, 1 } };
cairo_win32_scaled_font_t *scaled_font = abstract_font;
int x1 = 0, x2 = 0, y1 = 0, y2 = 0;
if (num_glyphs > 0) {
HDC hdc;
GLYPHMETRICS metrics;
cairo_status_t status;
int i;
hdc = _get_global_font_dc ();
assert (hdc != NULL);
status = cairo_win32_scaled_font_select_font (&scaled_font->base, hdc);
if (status)
return status;
for (i = 0; i < num_glyphs; i++) {
int x = _cairo_lround (glyphs[i].x);
int y = _cairo_lround (glyphs[i].y);
GetGlyphOutlineW (hdc, glyphs[i].index, GGO_METRICS | GGO_GLYPH_INDEX,
&metrics, 0, NULL, &matrix);
if (i == 0 || x1 > x + metrics.gmptGlyphOrigin.x)
x1 = x + metrics.gmptGlyphOrigin.x;
if (i == 0 || y1 > y - metrics.gmptGlyphOrigin.y)
y1 = y - metrics.gmptGlyphOrigin.y;
if (i == 0 || x2 < x + metrics.gmptGlyphOrigin.x + (int)metrics.gmBlackBoxX)
x2 = x + metrics.gmptGlyphOrigin.x + (int)metrics.gmBlackBoxX;
if (i == 0 || y2 < y - metrics.gmptGlyphOrigin.y + (int)metrics.gmBlackBoxY)
y2 = y - metrics.gmptGlyphOrigin.y + (int)metrics.gmBlackBoxY;
}
cairo_win32_scaled_font_done_font (&scaled_font->base);
}
bbox->p1.x = _cairo_fixed_from_int (x1);
bbox->p1.y = _cairo_fixed_from_int (y1);
bbox->p2.x = _cairo_fixed_from_int (x2);
bbox->p2.y = _cairo_fixed_from_int (y2);
return CAIRO_STATUS_SUCCESS;
}
#endif
typedef struct {
cairo_win32_scaled_font_t *scaled_font;
HDC hdc;
cairo_array_t glyphs;
cairo_array_t dx;
int start_x;
int last_x;
int last_y;
} cairo_glyph_state_t;
static void
_start_glyphs (cairo_glyph_state_t *state,
cairo_win32_scaled_font_t *scaled_font,
HDC hdc)
{
state->hdc = hdc;
state->scaled_font = scaled_font;
_cairo_array_init (&state->glyphs, sizeof (WCHAR));
_cairo_array_init (&state->dx, sizeof (int));
}
static cairo_status_t
_flush_glyphs (cairo_glyph_state_t *state)
{
cairo_status_t status;
int dx = 0;
WCHAR * elements;
int * dx_elements;
status = _cairo_array_append (&state->dx, &dx);
if (status)
return status;
elements = _cairo_array_index (&state->glyphs, 0);
dx_elements = _cairo_array_index (&state->dx, 0);
if (!ExtTextOutW (state->hdc,
state->start_x, state->last_y,
ETO_GLYPH_INDEX,
NULL,
elements,
state->glyphs.num_elements,
dx_elements)) {
return _cairo_win32_print_gdi_error ("_flush_glyphs");
}
_cairo_array_truncate (&state->glyphs, 0);
_cairo_array_truncate (&state->dx, 0);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_add_glyph (cairo_glyph_state_t *state,
unsigned long index,
double device_x,
double device_y)
{
cairo_status_t status;
double user_x = device_x;
double user_y = device_y;
WCHAR glyph_index = index;
int logical_x, logical_y;
cairo_matrix_transform_point (&state->scaled_font->device_to_logical, &user_x, &user_y);
logical_x = _cairo_lround (user_x);
logical_y = _cairo_lround (user_y);
if (state->glyphs.num_elements > 0) {
int dx;
if (logical_y != state->last_y) {
status = _flush_glyphs (state);
if (status)
return status;
state->start_x = logical_x;
} else {
dx = logical_x - state->last_x;
status = _cairo_array_append (&state->dx, &dx);
if (status)
return status;
}
} else {
state->start_x = logical_x;
}
state->last_x = logical_x;
state->last_y = logical_y;
status = _cairo_array_append (&state->glyphs, &glyph_index);
if (status)
return status;
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_finish_glyphs (cairo_glyph_state_t *state)
{
cairo_status_t status;
status = _flush_glyphs (state);
_cairo_array_fini (&state->glyphs);
_cairo_array_fini (&state->dx);
return status;
}
static cairo_status_t
_draw_glyphs_on_surface (cairo_win32_surface_t *surface,
cairo_win32_scaled_font_t *scaled_font,
COLORREF color,
int x_offset,
int y_offset,
const cairo_glyph_t *glyphs,
int num_glyphs)
{
cairo_glyph_state_t state;
cairo_status_t status, status2;
int i;
if (!SaveDC (surface->dc))
return _cairo_win32_print_gdi_error ("_draw_glyphs_on_surface:SaveDC");
status = cairo_win32_scaled_font_select_font (&scaled_font->base, surface->dc);
if (status)
goto FAIL1;
SetTextColor (surface->dc, color);
SetTextAlign (surface->dc, TA_BASELINE | TA_LEFT);
SetBkMode (surface->dc, TRANSPARENT);
_start_glyphs (&state, scaled_font, surface->dc);
for (i = 0; i < num_glyphs; i++) {
status = _add_glyph (&state, glyphs[i].index,
glyphs[i].x - x_offset, glyphs[i].y - y_offset);
if (status)
goto FAIL2;
}
FAIL2:
status2 = _finish_glyphs (&state);
if (status == CAIRO_STATUS_SUCCESS)
status = status2;
cairo_win32_scaled_font_done_font (&scaled_font->base);
FAIL1:
RestoreDC (surface->dc, -1);
return status;
}
/* Duplicate the green channel of a 4-channel mask in the alpha channel, then
* invert the whole mask.
*/
static void
_compute_argb32_mask_alpha (cairo_win32_surface_t *mask_surface)
{
cairo_image_surface_t *image = (cairo_image_surface_t *)mask_surface->image;
int i, j;
for (i = 0; i < image->height; i++) {
uint32_t *p = (uint32_t *) (image->data + i * image->stride);
for (j = 0; j < image->width; j++) {
*p = 0xffffffff ^ (*p | ((*p & 0x0000ff00) << 16));
p++;
}
}
}
/* Invert a mask
*/
static void
_invert_argb32_mask (cairo_win32_surface_t *mask_surface)
{
cairo_image_surface_t *image = (cairo_image_surface_t *)mask_surface->image;
int i, j;
for (i = 0; i < image->height; i++) {
uint32_t *p = (uint32_t *) (image->data + i * image->stride);
for (j = 0; j < image->width; j++) {
*p = 0xffffffff ^ *p;
p++;
}
}
}
/* Compute an alpha-mask from a monochrome RGB24 image
*/
static cairo_surface_t *
_compute_a8_mask (cairo_win32_surface_t *mask_surface)
{
cairo_image_surface_t *image24 = (cairo_image_surface_t *)mask_surface->image;
cairo_image_surface_t *image8;
int i, j;
if (image24->base.status)
return cairo_surface_reference (&image24->base);
image8 = (cairo_image_surface_t *)cairo_image_surface_create (CAIRO_FORMAT_A8,
image24->width, image24->height);
if (image8->base.status)
return &image8->base;
for (i = 0; i < image24->height; i++) {
uint32_t *p = (uint32_t *) (image24->data + i * image24->stride);
unsigned char *q = (unsigned char *) (image8->data + i * image8->stride);
for (j = 0; j < image24->width; j++) {
*q = 255 - ((*p & 0x0000ff00) >> 8);
p++;
q++;
}
}
return &image8->base;
}
static cairo_int_status_t
_cairo_win32_scaled_font_glyph_init (void *abstract_font,
cairo_scaled_glyph_t *scaled_glyph,
cairo_scaled_glyph_info_t info)
{
cairo_win32_scaled_font_t *scaled_font = abstract_font;
cairo_status_t status;
if ((info & CAIRO_SCALED_GLYPH_INFO_METRICS) != 0) {
status = _cairo_win32_scaled_font_init_glyph_metrics (scaled_font, scaled_glyph);
if (status)
return status;
}
if (info & CAIRO_SCALED_GLYPH_INFO_SURFACE) {
status = _cairo_win32_scaled_font_init_glyph_surface (scaled_font, scaled_glyph);
if (status)
return status;
}
if ((info & CAIRO_SCALED_GLYPH_INFO_PATH) != 0) {
status = _cairo_win32_scaled_font_init_glyph_path (scaled_font, scaled_glyph);
if (status)
return status;
}
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_win32_scaled_font_show_glyphs (void *abstract_font,
cairo_operator_t op,
const cairo_pattern_t *pattern,
cairo_surface_t *generic_surface,
int source_x,
int source_y,
int dest_x,
int dest_y,
unsigned int width,
unsigned int height,
cairo_glyph_t *glyphs,
int num_glyphs,
cairo_region_t *clip_region,
int *remaining_glyphs)
{
cairo_win32_scaled_font_t *scaled_font = abstract_font;
cairo_win32_surface_t *surface = (cairo_win32_surface_t *)generic_surface;
cairo_status_t status;
if (width == 0 || height == 0)
return CAIRO_STATUS_SUCCESS;
if (_cairo_surface_is_win32 (generic_surface) &&
surface->format == CAIRO_FORMAT_RGB24 &&
(generic_surface->permit_subpixel_antialiasing || scaled_font->quality != CLEARTYPE_QUALITY) &&
op == CAIRO_OPERATOR_OVER &&
_cairo_pattern_is_opaque_solid (pattern)) {
cairo_solid_pattern_t *solid_pattern = (cairo_solid_pattern_t *)pattern;
/* When compositing OVER on a GDI-understood surface, with a
* solid opaque color, we can just call ExtTextOut directly.
*/
COLORREF new_color;
status = _cairo_win32_surface_set_clip_region (surface, clip_region);
if (unlikely (status))
return status;
new_color = RGB (((int)solid_pattern->color.red_short) >> 8,
((int)solid_pattern->color.green_short) >> 8,
((int)solid_pattern->color.blue_short) >> 8);
return _draw_glyphs_on_surface (surface, scaled_font, new_color,
0, 0,
glyphs, num_glyphs);
} else {
/* Otherwise, we need to draw using software fallbacks. We create a mask
* surface by drawing the the glyphs onto a DIB, black-on-white then
* inverting. GDI outputs gamma-corrected images so inverted black-on-white
* is very different from white-on-black. We favor the more common
* case where the final output is dark-on-light.
*/
cairo_win32_surface_t *tmp_surface;
cairo_surface_t *mask_surface;
cairo_surface_pattern_t mask;
cairo_bool_t use_subpixel_antialiasing =
scaled_font->quality == CLEARTYPE_QUALITY && generic_surface->permit_subpixel_antialiasing;
RECT r;
tmp_surface = (cairo_win32_surface_t *)cairo_win32_surface_create_with_dib (CAIRO_FORMAT_ARGB32, width, height);
if (tmp_surface->base.status)
return tmp_surface->base.status;
r.left = 0;
r.top = 0;
r.right = width;
r.bottom = height;
FillRect (tmp_surface->dc, &r, GetStockObject (WHITE_BRUSH));
status = _draw_glyphs_on_surface (tmp_surface,
scaled_font, RGB (0, 0, 0),
dest_x, dest_y,
glyphs, num_glyphs);
if (status) {
cairo_surface_destroy (&tmp_surface->base);
return status;
}
if (use_subpixel_antialiasing) {
/* For ClearType, we need a 4-channel mask. If we are compositing on
* a surface with alpha, we need to compute the alpha channel of
* the mask (we just copy the green channel). But for a destination
* surface without alpha the alpha channel of the mask is ignored
*/
if (surface->format != CAIRO_FORMAT_RGB24)
_compute_argb32_mask_alpha (tmp_surface);
else
_invert_argb32_mask (tmp_surface);
mask_surface = &tmp_surface->base;
} else {
mask_surface = _compute_a8_mask (tmp_surface);
cairo_surface_destroy (&tmp_surface->base);
status = mask_surface->status;
if (status)
return status;
}
/* For op == OVER, no-cleartype, a possible optimization here is to
* draw onto an intermediate ARGB32 surface and alpha-blend that with the
* destination
*/
_cairo_pattern_init_for_surface (&mask, mask_surface);
cairo_surface_destroy (mask_surface);
if (use_subpixel_antialiasing)
mask.base.has_component_alpha = TRUE;
status = _cairo_surface_composite (op, pattern,
&mask.base,
&surface->base,
source_x, source_y,
0, 0,
dest_x, dest_y,
width, height,
clip_region);
_cairo_pattern_fini (&mask.base);
return status;
}
}
static cairo_int_status_t
_cairo_win32_scaled_font_load_truetype_table (void *abstract_font,
unsigned long tag,
long offset,
unsigned char *buffer,
unsigned long *length)
{
cairo_win32_scaled_font_t *scaled_font = abstract_font;
HDC hdc;
cairo_status_t status;
hdc = _get_global_font_dc ();
assert (hdc != NULL);
tag = (tag&0x000000ff)<<24 | (tag&0x0000ff00)<<8 | (tag&0x00ff0000)>>8 | (tag&0xff000000)>>24;
status = cairo_win32_scaled_font_select_font (&scaled_font->base, hdc);
if (status)
return status;
*length = GetFontData (hdc, tag, offset, buffer, *length);
if (*length == GDI_ERROR)
status = CAIRO_INT_STATUS_UNSUPPORTED;
cairo_win32_scaled_font_done_font (&scaled_font->base);
return status;
}
static cairo_int_status_t
_cairo_win32_scaled_font_index_to_ucs4 (void *abstract_font,
unsigned long index,
uint32_t *ucs4)
{
cairo_win32_scaled_font_t *scaled_font = abstract_font;
GLYPHSET *glyph_set;
uint16_t *utf16 = NULL;
WORD *glyph_indices = NULL;
HDC hdc = NULL;
int res;
unsigned int i, j, num_glyphs;
cairo_status_t status;
hdc = _get_global_font_dc ();
assert (hdc != NULL);
status = cairo_win32_scaled_font_select_font (&scaled_font->base, hdc);
if (status)
return status;
res = GetFontUnicodeRanges(hdc, NULL);
if (res == 0) {
status = _cairo_win32_print_gdi_error (
"_cairo_win32_scaled_font_index_to_ucs4:GetFontUnicodeRanges");
goto exit1;
}
glyph_set = malloc (res);
if (glyph_set == NULL) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto exit1;
}
res = GetFontUnicodeRanges(hdc, glyph_set);
if (res == 0) {
status = _cairo_win32_print_gdi_error (
"_cairo_win32_scaled_font_index_to_ucs4:GetFontUnicodeRanges");
goto exit1;
}
*ucs4 = (uint32_t) -1;
for (i = 0; i < glyph_set->cRanges; i++) {
num_glyphs = glyph_set->ranges[i].cGlyphs;
utf16 = _cairo_malloc_ab (num_glyphs + 1, sizeof (uint16_t));
if (utf16 == NULL) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto exit1;
}
glyph_indices = _cairo_malloc_ab (num_glyphs + 1, sizeof (WORD));
if (glyph_indices == NULL) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto exit2;
}
for (j = 0; j < num_glyphs; j++)
utf16[j] = glyph_set->ranges[i].wcLow + j;
utf16[j] = 0;
if (GetGlyphIndicesW (hdc, utf16, num_glyphs, glyph_indices, 0) == GDI_ERROR) {
status = _cairo_win32_print_gdi_error (
"_cairo_win32_scaled_font_index_to_ucs4:GetGlyphIndicesW");
goto exit2;