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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 pixman_bool_t
general_src_iter_init (pixman_implementation_t *imp, pixman_iter_t *iter)
{
pixman_image_t *image = iter->image;
if (image->type == LINEAR)
_pixman_linear_gradient_iter_init (image, iter);
else if (image->type == RADIAL)
_pixman_radial_gradient_iter_init (image, iter);
else if (image->type == CONICAL)
_pixman_conical_gradient_iter_init (image, iter);
else if (image->type == BITS)
_pixman_bits_image_src_iter_init (image, iter);
else if (image->type == SOLID)
_pixman_log_error (FUNC, "Solid image not handled by noop");
else
_pixman_log_error (FUNC, "Pixman bug: unknown image type\n");
return TRUE;
}
static pixman_bool_t
general_dest_iter_init (pixman_implementation_t *imp, pixman_iter_t *iter)
{
if (iter->image->type == BITS)
{
_pixman_bits_image_dest_iter_init (iter->image, iter);
return TRUE;
}
else
{
_pixman_log_error (FUNC, "Trying to write to a non-writable image");
return FALSE;
}
}
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 void
general_composite_rect (pixman_implementation_t *imp,
pixman_composite_info_t *info)
{
PIXMAN_COMPOSITE_ARGS (info);
uint64_t stack_scanline_buffer[(SCANLINE_BUFFER_LENGTH * 3 + 7) / 8];
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 narrow, src_iter_flags;
iter_flags_t rgb16;
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))
{
narrow = ITER_NARROW;
Bpp = 4;
}
else
{
narrow = 0;
Bpp = 16;
}
// XXX: This special casing is bad. Ideally, we'd keep the general code general perhaps
// by having it deal more specifically with different intermediate formats
if (
(dest_image->common.flags & FAST_PATH_16_FORMAT && (src_image->type == LINEAR || src_image->type == RADIAL)) &&
( op == PIXMAN_OP_SRC ||
(op == PIXMAN_OP_OVER && (src_image->common.flags & FAST_PATH_IS_OPAQUE))
)
) {
rgb16 = ITER_16;
} else {
rgb16 = 0;
}
if (width * Bpp > SCANLINE_BUFFER_LENGTH)
{
scanline_buffer = pixman_malloc_abc (width, 3, Bpp);
if (!scanline_buffer)
return;
}
src_buffer = scanline_buffer;
mask_buffer = src_buffer + width * Bpp;
dest_buffer = mask_buffer + width * Bpp;
if (!narrow)
{
/* 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 = narrow | op_flags[op].src | rgb16;
_pixman_implementation_src_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.type == BITS &&
mask_image->common.component_alpha &&
PIXMAN_FORMAT_RGB (mask_image->bits.format);
_pixman_implementation_src_iter_init (
imp->toplevel, &mask_iter, mask_image, mask_x, mask_y, width, height,
mask_buffer, narrow | (component_alpha? 0 : ITER_IGNORE_RGB), info->mask_flags);
/* dest iter */
_pixman_implementation_dest_iter_init (
imp->toplevel, &dest_iter, dest_image, dest_x, dest_y, width, height,
dest_buffer, narrow | op_flags[op].dst | rgb16, info->dest_flags);
compose = _pixman_implementation_lookup_combiner (
imp->toplevel, op, component_alpha, narrow, !!rgb16);
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 (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_16 (imp);
_pixman_setup_combiner_functions_32 (imp);
_pixman_setup_combiner_functions_float (imp);
imp->src_iter_init = general_src_iter_init;
imp->dest_iter_init = general_dest_iter_init;
return imp;
}
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