The Tor Browser: gfx/cairo/libpixman/src/pixman-general.c@6474c204b198 (annotated)

gfx/cairo/libpixman/src/pixman-general.c@6474c204b198 (annotated)

gfx/cairo/libpixman/src/pixman-general.c

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /*
  * 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;
 }

The Tor Browser / annotate

gfx/cairo/libpixman/src/pixman-general.c@6474c204b198 (annotated)

gfx/cairo/libpixman/src/pixman-general.c