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gfx/cairo/libpixman/src/pixman-general.c@b8a032363ba2 (annotated)

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

Thu, 22 Jan 2015 13:21:57 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Thu, 22 Jan 2015 13:21:57 +0100
branch
TOR_BUG_9701
changeset 15
b8a032363ba2
permissions
-rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

michael@0 1 /*
michael@0 2 * Copyright © 2009 Red Hat, Inc.
michael@0 3 * Copyright © 2000 SuSE, Inc.
michael@0 4 * Copyright © 2007 Red Hat, Inc.
michael@0 5 * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
michael@0 6 * 2005 Lars Knoll & Zack Rusin, Trolltech
michael@0 7 * 2008 Aaron Plattner, NVIDIA Corporation
michael@0 8 *
michael@0 9 * Permission to use, copy, modify, distribute, and sell this software and its
michael@0 10 * documentation for any purpose is hereby granted without fee, provided that
michael@0 11 * the above copyright notice appear in all copies and that both that
michael@0 12 * copyright notice and this permission notice appear in supporting
michael@0 13 * documentation, and that the name of Red Hat not be used in advertising or
michael@0 14 * publicity pertaining to distribution of the software without specific,
michael@0 15 * written prior permission. Red Hat makes no representations about the
michael@0 16 * suitability of this software for any purpose. It is provided "as is"
michael@0 17 * without express or implied warranty.
michael@0 18 *
michael@0 19 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
michael@0 20 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
michael@0 21 * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
michael@0 22 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
michael@0 23 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
michael@0 24 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
michael@0 25 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
michael@0 26 * SOFTWARE.
michael@0 27 */
michael@0 28 #ifdef HAVE_CONFIG_H
michael@0 29 #include <config.h>
michael@0 30 #endif
michael@0 31 #include <stdlib.h>
michael@0 32 #include <string.h>
michael@0 33 #include <math.h>
michael@0 34 #include <limits.h>
michael@0 35 #include <stdio.h>
michael@0 36 #include <stdlib.h>
michael@0 37 #include <string.h>
michael@0 38 #include "pixman-private.h"
michael@0 39
michael@0 40 static pixman_bool_t
michael@0 41 general_src_iter_init (pixman_implementation_t *imp, pixman_iter_t *iter)
michael@0 42 {
michael@0 43 pixman_image_t *image = iter->image;
michael@0 44
michael@0 45 if (image->type == LINEAR)
michael@0 46 _pixman_linear_gradient_iter_init (image, iter);
michael@0 47 else if (image->type == RADIAL)
michael@0 48 _pixman_radial_gradient_iter_init (image, iter);
michael@0 49 else if (image->type == CONICAL)
michael@0 50 _pixman_conical_gradient_iter_init (image, iter);
michael@0 51 else if (image->type == BITS)
michael@0 52 _pixman_bits_image_src_iter_init (image, iter);
michael@0 53 else if (image->type == SOLID)
michael@0 54 _pixman_log_error (FUNC, "Solid image not handled by noop");
michael@0 55 else
michael@0 56 _pixman_log_error (FUNC, "Pixman bug: unknown image type\n");
michael@0 57
michael@0 58 return TRUE;
michael@0 59 }
michael@0 60
michael@0 61 static pixman_bool_t
michael@0 62 general_dest_iter_init (pixman_implementation_t *imp, pixman_iter_t *iter)
michael@0 63 {
michael@0 64 if (iter->image->type == BITS)
michael@0 65 {
michael@0 66 _pixman_bits_image_dest_iter_init (iter->image, iter);
michael@0 67
michael@0 68 return TRUE;
michael@0 69 }
michael@0 70 else
michael@0 71 {
michael@0 72 _pixman_log_error (FUNC, "Trying to write to a non-writable image");
michael@0 73
michael@0 74 return FALSE;
michael@0 75 }
michael@0 76 }
michael@0 77
michael@0 78 typedef struct op_info_t op_info_t;
michael@0 79 struct op_info_t
michael@0 80 {
michael@0 81 uint8_t src, dst;
michael@0 82 };
michael@0 83
michael@0 84 #define ITER_IGNORE_BOTH \
michael@0 85 (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB | ITER_LOCALIZED_ALPHA)
michael@0 86
michael@0 87 static const op_info_t op_flags[PIXMAN_N_OPERATORS] =
michael@0 88 {
michael@0 89 /* Src Dst */
michael@0 90 { ITER_IGNORE_BOTH, ITER_IGNORE_BOTH }, /* CLEAR */
michael@0 91 { ITER_LOCALIZED_ALPHA, ITER_IGNORE_BOTH }, /* SRC */
michael@0 92 { ITER_IGNORE_BOTH, ITER_LOCALIZED_ALPHA }, /* DST */
michael@0 93 { 0, ITER_LOCALIZED_ALPHA }, /* OVER */
michael@0 94 { ITER_LOCALIZED_ALPHA, 0 }, /* OVER_REVERSE */
michael@0 95 { ITER_LOCALIZED_ALPHA, ITER_IGNORE_RGB }, /* IN */
michael@0 96 { ITER_IGNORE_RGB, ITER_LOCALIZED_ALPHA }, /* IN_REVERSE */
michael@0 97 { ITER_LOCALIZED_ALPHA, ITER_IGNORE_RGB }, /* OUT */
michael@0 98 { ITER_IGNORE_RGB, ITER_LOCALIZED_ALPHA }, /* OUT_REVERSE */
michael@0 99 { 0, 0 }, /* ATOP */
michael@0 100 { 0, 0 }, /* ATOP_REVERSE */
michael@0 101 { 0, 0 }, /* XOR */
michael@0 102 { ITER_LOCALIZED_ALPHA, ITER_LOCALIZED_ALPHA }, /* ADD */
michael@0 103 { 0, 0 }, /* SATURATE */
michael@0 104 };
michael@0 105
michael@0 106 #define SCANLINE_BUFFER_LENGTH 8192
michael@0 107
michael@0 108 static void
michael@0 109 general_composite_rect (pixman_implementation_t *imp,
michael@0 110 pixman_composite_info_t *info)
michael@0 111 {
michael@0 112 PIXMAN_COMPOSITE_ARGS (info);
michael@0 113 uint64_t stack_scanline_buffer[(SCANLINE_BUFFER_LENGTH * 3 + 7) / 8];
michael@0 114 uint8_t *scanline_buffer = (uint8_t *) stack_scanline_buffer;
michael@0 115 uint8_t *src_buffer, *mask_buffer, *dest_buffer;
michael@0 116 pixman_iter_t src_iter, mask_iter, dest_iter;
michael@0 117 pixman_combine_32_func_t compose;
michael@0 118 pixman_bool_t component_alpha;
michael@0 119 iter_flags_t narrow, src_iter_flags;
michael@0 120 iter_flags_t rgb16;
michael@0 121 int Bpp;
michael@0 122 int i;
michael@0 123
michael@0 124 if ((src_image->common.flags & FAST_PATH_NARROW_FORMAT) &&
michael@0 125 (!mask_image || mask_image->common.flags & FAST_PATH_NARROW_FORMAT) &&
michael@0 126 (dest_image->common.flags & FAST_PATH_NARROW_FORMAT))
michael@0 127 {
michael@0 128 narrow = ITER_NARROW;
michael@0 129 Bpp = 4;
michael@0 130 }
michael@0 131 else
michael@0 132 {
michael@0 133 narrow = 0;
michael@0 134 Bpp = 16;
michael@0 135 }
michael@0 136
michael@0 137 // XXX: This special casing is bad. Ideally, we'd keep the general code general perhaps
michael@0 138 // by having it deal more specifically with different intermediate formats
michael@0 139 if (
michael@0 140 (dest_image->common.flags & FAST_PATH_16_FORMAT && (src_image->type == LINEAR || src_image->type == RADIAL)) &&
michael@0 141 ( op == PIXMAN_OP_SRC ||
michael@0 142 (op == PIXMAN_OP_OVER && (src_image->common.flags & FAST_PATH_IS_OPAQUE))
michael@0 143 )
michael@0 144 ) {
michael@0 145 rgb16 = ITER_16;
michael@0 146 } else {
michael@0 147 rgb16 = 0;
michael@0 148 }
michael@0 149
michael@0 150
michael@0 151 if (width * Bpp > SCANLINE_BUFFER_LENGTH)
michael@0 152 {
michael@0 153 scanline_buffer = pixman_malloc_abc (width, 3, Bpp);
michael@0 154
michael@0 155 if (!scanline_buffer)
michael@0 156 return;
michael@0 157 }
michael@0 158
michael@0 159 src_buffer = scanline_buffer;
michael@0 160 mask_buffer = src_buffer + width * Bpp;
michael@0 161 dest_buffer = mask_buffer + width * Bpp;
michael@0 162
michael@0 163 if (!narrow)
michael@0 164 {
michael@0 165 /* To make sure there aren't any NANs in the buffers */
michael@0 166 memset (src_buffer, 0, width * Bpp);
michael@0 167 memset (mask_buffer, 0, width * Bpp);
michael@0 168 memset (dest_buffer, 0, width * Bpp);
michael@0 169 }
michael@0 170
michael@0 171 /* src iter */
michael@0 172 src_iter_flags = narrow | op_flags[op].src | rgb16;
michael@0 173
michael@0 174 _pixman_implementation_src_iter_init (imp->toplevel, &src_iter, src_image,
michael@0 175 src_x, src_y, width, height,
michael@0 176 src_buffer, src_iter_flags, info->src_flags);
michael@0 177
michael@0 178 /* mask iter */
michael@0 179 if ((src_iter_flags & (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB)) ==
michael@0 180 (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB))
michael@0 181 {
michael@0 182 /* If it doesn't matter what the source is, then it doesn't matter
michael@0 183 * what the mask is
michael@0 184 */
michael@0 185 mask_image = NULL;
michael@0 186 }
michael@0 187
michael@0 188 component_alpha =
michael@0 189 mask_image &&
michael@0 190 mask_image->common.type == BITS &&
michael@0 191 mask_image->common.component_alpha &&
michael@0 192 PIXMAN_FORMAT_RGB (mask_image->bits.format);
michael@0 193
michael@0 194 _pixman_implementation_src_iter_init (
michael@0 195 imp->toplevel, &mask_iter, mask_image, mask_x, mask_y, width, height,
michael@0 196 mask_buffer, narrow | (component_alpha? 0 : ITER_IGNORE_RGB), info->mask_flags);
michael@0 197
michael@0 198 /* dest iter */
michael@0 199 _pixman_implementation_dest_iter_init (
michael@0 200 imp->toplevel, &dest_iter, dest_image, dest_x, dest_y, width, height,
michael@0 201 dest_buffer, narrow | op_flags[op].dst | rgb16, info->dest_flags);
michael@0 202
michael@0 203 compose = _pixman_implementation_lookup_combiner (
michael@0 204 imp->toplevel, op, component_alpha, narrow, !!rgb16);
michael@0 205
michael@0 206 for (i = 0; i < height; ++i)
michael@0 207 {
michael@0 208 uint32_t *s, *m, *d;
michael@0 209
michael@0 210 m = mask_iter.get_scanline (&mask_iter, NULL);
michael@0 211 s = src_iter.get_scanline (&src_iter, m);
michael@0 212 d = dest_iter.get_scanline (&dest_iter, NULL);
michael@0 213
michael@0 214 compose (imp->toplevel, op, d, s, m, width);
michael@0 215
michael@0 216 dest_iter.write_back (&dest_iter);
michael@0 217 }
michael@0 218
michael@0 219 if (scanline_buffer != (uint8_t *) stack_scanline_buffer)
michael@0 220 free (scanline_buffer);
michael@0 221 }
michael@0 222
michael@0 223 static const pixman_fast_path_t general_fast_path[] =
michael@0 224 {
michael@0 225 { PIXMAN_OP_any, PIXMAN_any, 0, PIXMAN_any, 0, PIXMAN_any, 0, general_composite_rect },
michael@0 226 { PIXMAN_OP_NONE }
michael@0 227 };
michael@0 228
michael@0 229 pixman_implementation_t *
michael@0 230 _pixman_implementation_create_general (void)
michael@0 231 {
michael@0 232 pixman_implementation_t *imp = _pixman_implementation_create (NULL, general_fast_path);
michael@0 233
michael@0 234 _pixman_setup_combiner_functions_16 (imp);
michael@0 235 _pixman_setup_combiner_functions_32 (imp);
michael@0 236 _pixman_setup_combiner_functions_float (imp);
michael@0 237
michael@0 238 imp->src_iter_init = general_src_iter_init;
michael@0 239 imp->dest_iter_init = general_dest_iter_init;
michael@0 240
michael@0 241 return imp;
michael@0 242 }
michael@0 243

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