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/*
* Copyright © 2009 Red Hat, Inc.
* Copyright © 2000 SuSE, Inc.
* Copyright © 2007 Red Hat, Inc.
* Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
* 2005 Lars Knoll & Zack Rusin, Trolltech
* 2008 Aaron Plattner, NVIDIA Corporation
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Red Hat not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. Red Hat makes no representations about the
* suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "pixman-private.h"
static void
general_iter_init (pixman_iter_t *iter, const pixman_iter_info_t *info)
{
pixman_image_t *image = iter->image;
switch (image->type)
{
case BITS:
if ((iter->iter_flags & ITER_SRC) == ITER_SRC)
_pixman_bits_image_src_iter_init (image, iter);
else
_pixman_bits_image_dest_iter_init (image, iter);
break;
case LINEAR:
_pixman_linear_gradient_iter_init (image, iter);
break;
case RADIAL:
_pixman_radial_gradient_iter_init (image, iter);
break;
case CONICAL:
_pixman_conical_gradient_iter_init (image, iter);
break;
case SOLID:
_pixman_log_error (FUNC, "Solid image not handled by noop");
break;
default:
_pixman_log_error (FUNC, "Pixman bug: unknown image type\n");
break;
}
}
static const pixman_iter_info_t general_iters[] =
{
{ PIXMAN_any, 0, 0, general_iter_init, NULL, NULL },
{ PIXMAN_null },
};
typedef struct op_info_t op_info_t;
struct op_info_t
{
uint8_t src, dst;
};
#define ITER_IGNORE_BOTH \
(ITER_IGNORE_ALPHA | ITER_IGNORE_RGB | ITER_LOCALIZED_ALPHA)
static const op_info_t op_flags[PIXMAN_N_OPERATORS] =
{
/* Src Dst */
{ ITER_IGNORE_BOTH, ITER_IGNORE_BOTH }, /* CLEAR */
{ ITER_LOCALIZED_ALPHA, ITER_IGNORE_BOTH }, /* SRC */
{ ITER_IGNORE_BOTH, ITER_LOCALIZED_ALPHA }, /* DST */
{ 0, ITER_LOCALIZED_ALPHA }, /* OVER */
{ ITER_LOCALIZED_ALPHA, 0 }, /* OVER_REVERSE */
{ ITER_LOCALIZED_ALPHA, ITER_IGNORE_RGB }, /* IN */
{ ITER_IGNORE_RGB, ITER_LOCALIZED_ALPHA }, /* IN_REVERSE */
{ ITER_LOCALIZED_ALPHA, ITER_IGNORE_RGB }, /* OUT */
{ ITER_IGNORE_RGB, ITER_LOCALIZED_ALPHA }, /* OUT_REVERSE */
{ 0, 0 }, /* ATOP */
{ 0, 0 }, /* ATOP_REVERSE */
{ 0, 0 }, /* XOR */
{ ITER_LOCALIZED_ALPHA, ITER_LOCALIZED_ALPHA }, /* ADD */
{ 0, 0 }, /* SATURATE */
};
#define SCANLINE_BUFFER_LENGTH 8192
static pixman_bool_t
operator_needs_division (pixman_op_t op)
{
static const uint8_t needs_division[] =
{
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, /* SATURATE */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, /* DISJOINT */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, /* CONJOINT */
0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0, /* blend ops */
};
return needs_division[op];
}
static void
general_composite_rect (pixman_implementation_t *imp,
pixman_composite_info_t *info)
{
PIXMAN_COMPOSITE_ARGS (info);
uint8_t stack_scanline_buffer[3 * SCANLINE_BUFFER_LENGTH];
uint8_t *scanline_buffer = (uint8_t *) stack_scanline_buffer;
uint8_t *src_buffer, *mask_buffer, *dest_buffer;
pixman_iter_t src_iter, mask_iter, dest_iter;
pixman_combine_32_func_t compose;
pixman_bool_t component_alpha;
iter_flags_t width_flag, src_iter_flags;
int Bpp;
int i;
if ((src_image->common.flags & FAST_PATH_NARROW_FORMAT) &&
(!mask_image || mask_image->common.flags & FAST_PATH_NARROW_FORMAT) &&
(dest_image->common.flags & FAST_PATH_NARROW_FORMAT) &&
!(operator_needs_division (op)) &&
(dest_image->bits.dither == PIXMAN_DITHER_NONE))
{
width_flag = ITER_NARROW;
Bpp = 4;
}
else
{
width_flag = ITER_WIDE;
Bpp = 16;
}
#define ALIGN(addr) \
((uint8_t *)((((uintptr_t)(addr)) + 15) & (~15)))
if (width <= 0 || _pixman_multiply_overflows_int (width, Bpp * 3))
return;
if (width * Bpp * 3 > sizeof (stack_scanline_buffer) - 15 * 3)
{
scanline_buffer = pixman_malloc_ab_plus_c (width, Bpp * 3, 15 * 3);
if (!scanline_buffer)
return;
memset (scanline_buffer, 0, width * Bpp * 3 + 15 * 3);
}
else
{
memset (stack_scanline_buffer, 0, sizeof (stack_scanline_buffer));
}
src_buffer = ALIGN (scanline_buffer);
mask_buffer = ALIGN (src_buffer + width * Bpp);
dest_buffer = ALIGN (mask_buffer + width * Bpp);
if (width_flag == ITER_WIDE)
{
/* To make sure there aren't any NANs in the buffers */
memset (src_buffer, 0, width * Bpp);
memset (mask_buffer, 0, width * Bpp);
memset (dest_buffer, 0, width * Bpp);
}
/* src iter */
src_iter_flags = width_flag | op_flags[op].src | ITER_SRC;
_pixman_implementation_iter_init (imp->toplevel, &src_iter, src_image,
src_x, src_y, width, height,
src_buffer, src_iter_flags,
info->src_flags);
/* mask iter */
if ((src_iter_flags & (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB)) ==
(ITER_IGNORE_ALPHA | ITER_IGNORE_RGB))
{
/* If it doesn't matter what the source is, then it doesn't matter
* what the mask is
*/
mask_image = NULL;
}
component_alpha = mask_image && mask_image->common.component_alpha;
_pixman_implementation_iter_init (
imp->toplevel, &mask_iter,
mask_image, mask_x, mask_y, width, height, mask_buffer,
ITER_SRC | width_flag | (component_alpha? 0 : ITER_IGNORE_RGB),
info->mask_flags);
/* dest iter */
_pixman_implementation_iter_init (
imp->toplevel, &dest_iter, dest_image, dest_x, dest_y, width, height,
dest_buffer, ITER_DEST | width_flag | op_flags[op].dst, info->dest_flags);
compose = _pixman_implementation_lookup_combiner (
imp->toplevel, op, component_alpha, width_flag != ITER_WIDE);
for (i = 0; i < height; ++i)
{
uint32_t *s, *m, *d;
m = mask_iter.get_scanline (&mask_iter, NULL);
s = src_iter.get_scanline (&src_iter, m);
d = dest_iter.get_scanline (&dest_iter, NULL);
compose (imp->toplevel, op, d, s, m, width);
dest_iter.write_back (&dest_iter);
}
if (src_iter.fini)
src_iter.fini (&src_iter);
if (mask_iter.fini)
mask_iter.fini (&mask_iter);
if (dest_iter.fini)
dest_iter.fini (&dest_iter);
if (scanline_buffer != (uint8_t *) stack_scanline_buffer)
free (scanline_buffer);
}
static const pixman_fast_path_t general_fast_path[] =
{
{ PIXMAN_OP_any, PIXMAN_any, 0, PIXMAN_any, 0, PIXMAN_any, 0, general_composite_rect },
{ PIXMAN_OP_NONE }
};
pixman_implementation_t *
_pixman_implementation_create_general (void)
{
pixman_implementation_t *imp = _pixman_implementation_create (NULL, general_fast_path);
_pixman_setup_combiner_functions_32 (imp);
_pixman_setup_combiner_functions_float (imp);
imp->iter_info = general_iters;
return imp;
}