Bug Summary

File:root/firefox-clang/gfx/cairo/libpixman/src/pixman-glyph.c
Warning:line 490, column 3
Called function pointer is null (null dereference)

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name pixman-glyph.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -mframe-pointer=all -relaxed-aliasing -ffp-contract=off -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/root/firefox-clang/obj-x86_64-pc-linux-gnu/gfx/cairo/libpixman/src -fcoverage-compilation-dir=/root/firefox-clang/obj-x86_64-pc-linux-gnu/gfx/cairo/libpixman/src -resource-dir /usr/lib/llvm-21/lib/clang/21 -include /root/firefox-clang/config/gcc_hidden.h -include /root/firefox-clang/obj-x86_64-pc-linux-gnu/mozilla-config.h -I /root/firefox-clang/obj-x86_64-pc-linux-gnu/dist/system_wrappers -U _FORTIFY_SOURCE -D _FORTIFY_SOURCE=2 -D _GLIBCXX_ASSERTIONS -D DEBUG=1 -D HAVE_PTHREADS -D PACKAGE=mozpixman -D USE_X86_MMX -D USE_SSE2 -D USE_SSSE3 -D MOZ_HAS_MOZGLUE -D MOZILLA_INTERNAL_API -D IMPL_LIBXUL -D MOZ_SUPPORT_LEAKCHECKING -D STATIC_EXPORTABLE_JS_API -I /root/firefox-clang/gfx/cairo/libpixman/src -I /root/firefox-clang/obj-x86_64-pc-linux-gnu/gfx/cairo/libpixman/src -I /root/firefox-clang/gfx/cairo/cairo/src -I /root/firefox-clang/obj-x86_64-pc-linux-gnu/dist/include -I /root/firefox-clang/obj-x86_64-pc-linux-gnu/dist/include/nspr -I /root/firefox-clang/obj-x86_64-pc-linux-gnu/dist/include/nss -D MOZILLA_CLIENT -internal-isystem /usr/lib/llvm-21/lib/clang/21/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-error=tautological-type-limit-compare -Wno-range-loop-analysis -Wno-error=deprecated-declarations -Wno-error=array-bounds -Wno-error=free-nonheap-object -Wno-error=atomic-alignment -Wno-error=deprecated-builtins -Wno-psabi -Wno-error=builtin-macro-redefined -Wno-unknown-warning-option -Wno-address -Wno-braced-scalar-init -Wno-missing-field-initializers -Wno-sign-compare -Wno-incompatible-pointer-types -Wno-unused -Wno-incompatible-pointer-types -Wno-tautological-compare -Wno-tautological-constant-out-of-range-compare -ferror-limit 19 -fstrict-flex-arrays=1 -stack-protector 2 -fstack-clash-protection -ftrivial-auto-var-init=pattern -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -vectorize-loops -vectorize-slp -analyzer-checker optin.performance.Padding -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2025-06-26-231904-1820671-1 -x c /root/firefox-clang/gfx/cairo/libpixman/src/pixman-glyph.c
1/*
2 * Copyright 2010, 2012, Soren Sandmann <sandmann@cs.au.dk>
3 * Copyright 2010, 2011, 2012, Red Hat, Inc
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 *
24 * Author: Soren Sandmann <sandmann@cs.au.dk>
25 */
26
27#ifdef HAVE_CONFIG_H
28#include <pixman-config.h>
29#endif
30#include "pixman-private.h"
31
32#include <stdlib.h>
33
34typedef struct glyph_metrics_t glyph_metrics_t;
35typedef struct glyph_t glyph_t;
36
37#define TOMBSTONE((glyph_t *)0x1) ((glyph_t *)0x1)
38
39/* XXX: These numbers are arbitrary---we've never done any measurements.
40 */
41#define N_GLYPHS_HIGH_WATER(16384) (16384)
42#define N_GLYPHS_LOW_WATER(8192) (8192)
43#define HASH_SIZE(2 * (16384)) (2 * N_GLYPHS_HIGH_WATER(16384))
44#define HASH_MASK((2 * (16384)) - 1) (HASH_SIZE(2 * (16384)) - 1)
45
46struct glyph_t
47{
48 void * font_key;
49 void * glyph_key;
50 int origin_x;
51 int origin_y;
52 pixman_image_t * image;
53 pixman_link_t mru_link;
54};
55
56struct pixman_glyph_cache_t
57{
58 int n_glyphs;
59 int n_tombstones;
60 int freeze_count;
61 pixman_list_t mru;
62 glyph_t * glyphs[HASH_SIZE(2 * (16384))];
63};
64
65static void
66free_glyph (glyph_t *glyph)
67{
68 pixman_list_unlink (&glyph->mru_link);
69 pixman_image_unref_moz_pixman_image_unref (glyph->image);
70 free (glyph);
71}
72
73static unsigned int
74hash (const void *font_key, const void *glyph_key)
75{
76 size_t key = (size_t)font_key + (size_t)glyph_key;
77
78 /* This hash function is based on one found on Thomas Wang's
79 * web page at
80 *
81 * http://www.concentric.net/~Ttwang/tech/inthash.htm
82 *
83 */
84 key = (key << 15) - key - 1;
85 key = key ^ (key >> 12);
86 key = key + (key << 2);
87 key = key ^ (key >> 4);
88 key = key + (key << 3) + (key << 11);
89 key = key ^ (key >> 16);
90
91 return key;
92}
93
94static glyph_t *
95lookup_glyph (pixman_glyph_cache_t *cache,
96 void *font_key,
97 void *glyph_key)
98{
99 unsigned idx;
100 glyph_t *g;
101
102 idx = hash (font_key, glyph_key);
103 while ((g = cache->glyphs[idx++ & HASH_MASK((2 * (16384)) - 1)]))
104 {
105 if (g != TOMBSTONE((glyph_t *)0x1) &&
106 g->font_key == font_key &&
107 g->glyph_key == glyph_key)
108 {
109 return g;
110 }
111 }
112
113 return NULL((void*)0);
114}
115
116static void
117insert_glyph (pixman_glyph_cache_t *cache,
118 glyph_t *glyph)
119{
120 unsigned idx;
121 glyph_t **loc;
122
123 idx = hash (glyph->font_key, glyph->glyph_key);
124
125 /* Note: we assume that there is room in the table. If there isn't,
126 * this will be an infinite loop.
127 */
128 do
129 {
130 loc = &cache->glyphs[idx++ & HASH_MASK((2 * (16384)) - 1)];
131 } while (*loc && *loc != TOMBSTONE((glyph_t *)0x1));
132
133 if (*loc == TOMBSTONE((glyph_t *)0x1))
134 cache->n_tombstones--;
135 cache->n_glyphs++;
136
137 *loc = glyph;
138}
139
140static void
141remove_glyph (pixman_glyph_cache_t *cache,
142 glyph_t *glyph)
143{
144 unsigned idx;
145
146 idx = hash (glyph->font_key, glyph->glyph_key);
147 while (cache->glyphs[idx & HASH_MASK((2 * (16384)) - 1)] != glyph)
148 idx++;
149
150 cache->glyphs[idx & HASH_MASK((2 * (16384)) - 1)] = TOMBSTONE((glyph_t *)0x1);
151 cache->n_tombstones++;
152 cache->n_glyphs--;
153
154 /* Eliminate tombstones if possible */
155 if (cache->glyphs[(idx + 1) & HASH_MASK((2 * (16384)) - 1)] == NULL((void*)0))
156 {
157 while (cache->glyphs[idx & HASH_MASK((2 * (16384)) - 1)] == TOMBSTONE((glyph_t *)0x1))
158 {
159 cache->glyphs[idx & HASH_MASK((2 * (16384)) - 1)] = NULL((void*)0);
160 cache->n_tombstones--;
161 idx--;
162 }
163 }
164}
165
166static void
167clear_table (pixman_glyph_cache_t *cache)
168{
169 int i;
170
171 for (i = 0; i < HASH_SIZE(2 * (16384)); ++i)
172 {
173 glyph_t *glyph = cache->glyphs[i];
174
175 if (glyph && glyph != TOMBSTONE((glyph_t *)0x1))
176 free_glyph (glyph);
177
178 cache->glyphs[i] = NULL((void*)0);
179 }
180
181 cache->n_glyphs = 0;
182 cache->n_tombstones = 0;
183}
184
185PIXMAN_EXPORTextern __attribute__((visibility("hidden"))) pixman_glyph_cache_t *
186pixman_glyph_cache_create_moz_pixman_glyph_cache_create (void)
187{
188 pixman_glyph_cache_t *cache;
189
190 if (!(cache = malloc (sizeof *cache)))
191 return NULL((void*)0);
192
193 memset (cache->glyphs, 0, sizeof (cache->glyphs));
194 cache->n_glyphs = 0;
195 cache->n_tombstones = 0;
196 cache->freeze_count = 0;
197
198 pixman_list_init (&cache->mru);
199
200 return cache;
201}
202
203PIXMAN_EXPORTextern __attribute__((visibility("hidden"))) void
204pixman_glyph_cache_destroy_moz_pixman_glyph_cache_destroy (pixman_glyph_cache_t *cache)
205{
206 return_if_fail (cache->freeze_count == 0)do { if (__builtin_expect ((!(cache->freeze_count == 0)), 0
)) { _pixman_log_error (((const char*) (__PRETTY_FUNCTION__))
, "The expression " "cache->freeze_count == 0" " was false"
); return; } } while (0);
207
208 clear_table (cache);
209
210 free (cache);
211}
212
213PIXMAN_EXPORTextern __attribute__((visibility("hidden"))) void
214pixman_glyph_cache_freeze_moz_pixman_glyph_cache_freeze (pixman_glyph_cache_t *cache)
215{
216 cache->freeze_count++;
217}
218
219PIXMAN_EXPORTextern __attribute__((visibility("hidden"))) void
220pixman_glyph_cache_thaw_moz_pixman_glyph_cache_thaw (pixman_glyph_cache_t *cache)
221{
222 if (--cache->freeze_count == 0 &&
223 cache->n_glyphs + cache->n_tombstones > N_GLYPHS_HIGH_WATER(16384))
224 {
225 if (cache->n_tombstones > N_GLYPHS_HIGH_WATER(16384))
226 {
227 /* More than half the entries are
228 * tombstones. Just dump the whole table.
229 */
230 clear_table (cache);
231 }
232
233 while (cache->n_glyphs > N_GLYPHS_LOW_WATER(8192))
234 {
235 glyph_t *glyph = CONTAINER_OF (glyph_t, mru_link, cache->mru.tail)((glyph_t *)(((uint8_t *)cache->mru.tail) - __builtin_offsetof
(glyph_t, mru_link)));
236
237 remove_glyph (cache, glyph);
238 free_glyph (glyph);
239 }
240 }
241}
242
243PIXMAN_EXPORTextern __attribute__((visibility("hidden"))) const void *
244pixman_glyph_cache_lookup_moz_pixman_glyph_cache_lookup (pixman_glyph_cache_t *cache,
245 void *font_key,
246 void *glyph_key)
247{
248 return lookup_glyph (cache, font_key, glyph_key);
249}
250
251PIXMAN_EXPORTextern __attribute__((visibility("hidden"))) const void *
252pixman_glyph_cache_insert_moz_pixman_glyph_cache_insert (pixman_glyph_cache_t *cache,
253 void *font_key,
254 void *glyph_key,
255 int origin_x,
256 int origin_y,
257 pixman_image_t *image)
258{
259 glyph_t *glyph;
260 int32_t width, height;
261
262 return_val_if_fail (cache->freeze_count > 0, NULL)do { if (__builtin_expect ((!(cache->freeze_count > 0))
, 0)) { _pixman_log_error (((const char*) (__PRETTY_FUNCTION__
)), "The expression " "cache->freeze_count > 0" " was false"
); return (((void*)0)); } } while (0);
263 return_val_if_fail (image->type == BITS, NULL)do { if (__builtin_expect ((!(image->type == BITS)), 0)) {
_pixman_log_error (((const char*) (__PRETTY_FUNCTION__)), "The expression "
"image->type == BITS" " was false"); return (((void*)0));
} } while (0);
264
265 width = image->bits.width;
266 height = image->bits.height;
267
268 if (cache->n_glyphs >= HASH_SIZE(2 * (16384)))
269 return NULL((void*)0);
270
271 if (!(glyph = malloc (sizeof *glyph)))
272 return NULL((void*)0);
273
274 glyph->font_key = font_key;
275 glyph->glyph_key = glyph_key;
276 glyph->origin_x = origin_x;
277 glyph->origin_y = origin_y;
278
279 if (!(glyph->image = pixman_image_create_bits_moz_pixman_image_create_bits (
280 image->bits.format, width, height, NULL((void*)0), -1)))
281 {
282 free (glyph);
283 return NULL((void*)0);
284 }
285
286 pixman_image_composite32_moz_pixman_image_composite32 (PIXMAN_OP_SRC,
287 image, NULL((void*)0), glyph->image, 0, 0, 0, 0, 0, 0,
288 width, height);
289
290 if (PIXMAN_FORMAT_A (glyph->image->bits.format)(((glyph->image->bits.format >> (12)) & ((1 <<
(4)) - 1)) << ((glyph->image->bits.format >>
22) & 3)) != 0 &&
291 PIXMAN_FORMAT_RGB (glyph->image->bits.format)(((glyph->image->bits.format) ) & 0xfff) != 0)
292 {
293 pixman_image_set_component_alpha_moz_pixman_image_set_component_alpha (glyph->image, TRUE1);
294 }
295
296 pixman_list_prepend (&cache->mru, &glyph->mru_link);
297
298 _pixman_image_validate (glyph->image);
299 insert_glyph (cache, glyph);
300
301 return glyph;
302}
303
304PIXMAN_EXPORTextern __attribute__((visibility("hidden"))) void
305pixman_glyph_cache_remove_moz_pixman_glyph_cache_remove (pixman_glyph_cache_t *cache,
306 void *font_key,
307 void *glyph_key)
308{
309 glyph_t *glyph;
310
311 if ((glyph = lookup_glyph (cache, font_key, glyph_key)))
312 {
313 remove_glyph (cache, glyph);
314
315 free_glyph (glyph);
316 }
317}
318
319PIXMAN_EXPORTextern __attribute__((visibility("hidden"))) void
320pixman_glyph_get_extents_moz_pixman_glyph_get_extents (pixman_glyph_cache_t *cache,
321 int n_glyphs,
322 pixman_glyph_t *glyphs,
323 pixman_box32_t *extents)
324{
325 int i;
326
327 extents->x1 = extents->y1 = INT32_MAX(2147483647);
328 extents->x2 = extents->y2 = INT32_MIN(-2147483647-1);
329
330 for (i = 0; i < n_glyphs; ++i)
331 {
332 glyph_t *glyph = (glyph_t *)glyphs[i].glyph;
333 int x1, y1, x2, y2;
334
335 x1 = glyphs[i].x - glyph->origin_x;
336 y1 = glyphs[i].y - glyph->origin_y;
337 x2 = glyphs[i].x - glyph->origin_x + glyph->image->bits.width;
338 y2 = glyphs[i].y - glyph->origin_y + glyph->image->bits.height;
339
340 if (x1 < extents->x1)
341 extents->x1 = x1;
342 if (y1 < extents->y1)
343 extents->y1 = y1;
344 if (x2 > extents->x2)
345 extents->x2 = x2;
346 if (y2 > extents->y2)
347 extents->y2 = y2;
348 }
349}
350
351/* This function returns a format that is suitable for use as a mask for the
352 * set of glyphs in question.
353 */
354PIXMAN_EXPORTextern __attribute__((visibility("hidden"))) pixman_format_code_t
355pixman_glyph_get_mask_format_moz_pixman_glyph_get_mask_format (pixman_glyph_cache_t *cache,
356 int n_glyphs,
357 const pixman_glyph_t *glyphs)
358{
359 pixman_format_code_t format = PIXMAN_a1;
360 int i;
361
362 for (i = 0; i < n_glyphs; ++i)
363 {
364 const glyph_t *glyph = glyphs[i].glyph;
365 pixman_format_code_t glyph_format = glyph->image->bits.format;
366
367 if (PIXMAN_FORMAT_TYPE (glyph_format)(((glyph_format) >> 16) & 0x3f) == PIXMAN_TYPE_A1)
368 {
369 if (PIXMAN_FORMAT_A (glyph_format)(((glyph_format >> (12)) & ((1 << (4)) - 1)) <<
((glyph_format >> 22) & 3)) > PIXMAN_FORMAT_A (format)(((format >> (12)) & ((1 << (4)) - 1)) <<
((format >> 22) & 3)))
370 format = glyph_format;
371 }
372 else
373 {
374 return PIXMAN_a8r8g8b8;
375 }
376 }
377
378 return format;
379}
380
381static pixman_bool_t
382box32_intersect (pixman_box32_t *dest,
383 const pixman_box32_t *box1,
384 const pixman_box32_t *box2)
385{
386 dest->x1 = MAX (box1->x1, box2->x1)((box1->x1 > box2->x1) ? box1->x1 : box2->x1);
387 dest->y1 = MAX (box1->y1, box2->y1)((box1->y1 > box2->y1) ? box1->y1 : box2->y1);
388 dest->x2 = MIN (box1->x2, box2->x2)((box1->x2 < box2->x2) ? box1->x2 : box2->x2);
389 dest->y2 = MIN (box1->y2, box2->y2)((box1->y2 < box2->y2) ? box1->y2 : box2->y2);
390
391 return dest->x2 > dest->x1 && dest->y2 > dest->y1;
392}
393
394#if defined(__GNUC__4) && defined(__i386__) && !defined(__x86_64__1) && \
395 !defined(__amd64__1)
396__attribute__((__force_align_arg_pointer__))
397#endif
398PIXMAN_EXPORTextern __attribute__((visibility("hidden"))) void
399pixman_composite_glyphs_no_mask_moz_pixman_composite_glyphs_no_mask (pixman_op_t op,
400 pixman_image_t *src,
401 pixman_image_t *dest,
402 int32_t src_x,
403 int32_t src_y,
404 int32_t dest_x,
405 int32_t dest_y,
406 pixman_glyph_cache_t *cache,
407 int n_glyphs,
408 const pixman_glyph_t *glyphs)
409{
410 pixman_region32_t region;
411 pixman_format_code_t glyph_format = PIXMAN_null(((0) << 24) | ((0) << 16) | ((0) << 12) | (
(0) << 8) | ((0) << 4) | ((0)));
412 uint32_t glyph_flags = 0;
413 pixman_format_code_t dest_format;
414 uint32_t dest_flags;
415 pixman_composite_func_t func = NULL((void*)0);
1
'func' initialized to a null pointer value
→
416 pixman_implementation_t *implementation = NULL((void*)0);
417 pixman_composite_info_t info;
418 int i;
419
420 _pixman_image_validate (src);
421 _pixman_image_validate (dest);
422
423 dest_format = dest->common.extended_format_code;
424 dest_flags = dest->common.flags;
425
426 pixman_region32_init_moz_pixman_region32_init (&region);
427 if (!_pixman_compute_composite_region32 (
2
←
Assuming the condition is false
→
3
←
Taking false branch
→
428 &region,
429 src, NULL((void*)0), dest,
430 src_x - dest_x, src_y - dest_y, 0, 0, 0, 0,
431 dest->bits.width, dest->bits.height))
432 {
433 goto out;
434 }
435
436 info.op = op;
437 info.src_image = src;
438 info.dest_image = dest;
439 info.src_flags = src->common.flags;
440 info.dest_flags = dest->common.flags;
441
442 for (i = 0; i < n_glyphs; ++i)
4
←
Assuming 'i' is < 'n_glyphs'
→
5
←
Loop condition is true. Entering loop body
→
443 {
444 glyph_t *glyph = (glyph_t *)glyphs[i].glyph;
445 pixman_image_t *glyph_img = glyph->image;
446 pixman_box32_t glyph_box;
447 pixman_box32_t *pbox;
448 uint32_t extra = FAST_PATH_SAMPLES_COVER_CLIP_NEAREST(1 << 23);
449 pixman_box32_t composite_box;
450 int n;
451
452 glyph_box.x1 = dest_x + glyphs[i].x - glyph->origin_x;
453 glyph_box.y1 = dest_y + glyphs[i].y - glyph->origin_y;
454 glyph_box.x2 = glyph_box.x1 + glyph->image->bits.width;
455 glyph_box.y2 = glyph_box.y1 + glyph->image->bits.height;
456
457 pbox = pixman_region32_rectangles_moz_pixman_region32_rectangles (&region, &n);
458
459 info.mask_image = glyph_img;
460
461 while (n--)
6
←
Loop condition is true. Entering loop body
→
462 {
463 if (box32_intersect (&composite_box, pbox, &glyph_box))
7
←
Assuming the condition is true
→
464 {
465 if (glyph_img->common.extended_format_code != glyph_format ||
8
←
Assuming 'glyph_format' is equal to field 'extended_format_code'
→
10
←
Taking false branch
→
466 glyph_img->common.flags != glyph_flags)
9
←
Assuming 'glyph_flags' is equal to field 'flags'
→
467 {
468 glyph_format = glyph_img->common.extended_format_code;
469 glyph_flags = glyph_img->common.flags;
470
471 _pixman_implementation_lookup_composite (
472 get_implementation(), op,
473 src->common.extended_format_code, src->common.flags,
474 glyph_format, glyph_flags | extra,
475 dest_format, dest_flags,
476 &implementation, &func);
477 }
478
479 info.src_x = src_x + composite_box.x1 - dest_x;
480 info.src_y = src_y + composite_box.y1 - dest_y;
481 info.mask_x = composite_box.x1 - (dest_x + glyphs[i].x - glyph->origin_x);
482 info.mask_y = composite_box.y1 - (dest_y + glyphs[i].y - glyph->origin_y);
483 info.dest_x = composite_box.x1;
484 info.dest_y = composite_box.y1;
485 info.width = composite_box.x2 - composite_box.x1;
486 info.height = composite_box.y2 - composite_box.y1;
487
488 info.mask_flags = glyph_flags;
489
490 func (implementation, &info);
11
←
Called function pointer is null (null dereference)
491 }
492
493 pbox++;
494 }
495 pixman_list_move_to_front (&cache->mru, &glyph->mru_link);
496 }
497
498out:
499 pixman_region32_fini_moz_pixman_region32_fini (&region);
500}
501
502static void
503add_glyphs (pixman_glyph_cache_t *cache,
504 pixman_image_t *dest,
505 int off_x, int off_y,
506 int n_glyphs, const pixman_glyph_t *glyphs)
507{
508 pixman_format_code_t glyph_format = PIXMAN_null(((0) << 24) | ((0) << 16) | ((0) << 12) | (
(0) << 8) | ((0) << 4) | ((0)));
509 uint32_t glyph_flags = 0;
510 pixman_composite_func_t func = NULL((void*)0);
511 pixman_implementation_t *implementation = NULL((void*)0);
512 pixman_format_code_t dest_format;
513 uint32_t dest_flags;
514 pixman_box32_t dest_box;
515 pixman_composite_info_t info;
516 pixman_image_t *white_img = NULL((void*)0);
517 pixman_bool_t white_src = FALSE0;
518 int i;
519
520 _pixman_image_validate (dest);
521
522 dest_format = dest->common.extended_format_code;
523 dest_flags = dest->common.flags;
524
525 info.op = PIXMAN_OP_ADD;
526 info.dest_image = dest;
527 info.src_x = 0;
528 info.src_y = 0;
529 info.dest_flags = dest_flags;
530
531 dest_box.x1 = 0;
532 dest_box.y1 = 0;
533 dest_box.x2 = dest->bits.width;
534 dest_box.y2 = dest->bits.height;
535
536 for (i = 0; i < n_glyphs; ++i)
537 {
538 glyph_t *glyph = (glyph_t *)glyphs[i].glyph;
539 pixman_image_t *glyph_img = glyph->image;
540 pixman_box32_t glyph_box;
541 pixman_box32_t composite_box;
542
543 if (glyph_img->common.extended_format_code != glyph_format ||
544 glyph_img->common.flags != glyph_flags)
545 {
546 pixman_format_code_t src_format, mask_format;
547
548 glyph_format = glyph_img->common.extended_format_code;
549 glyph_flags = glyph_img->common.flags;
550
551 if (glyph_format == dest->bits.format)
552 {
553 src_format = glyph_format;
554 mask_format = PIXMAN_null(((0) << 24) | ((0) << 16) | ((0) << 12) | (
(0) << 8) | ((0) << 4) | ((0)));
555 info.src_flags = glyph_flags | FAST_PATH_SAMPLES_COVER_CLIP_NEAREST(1 << 23);
556 info.mask_flags = FAST_PATH_IS_OPAQUE(1 << 13);
557 info.mask_image = NULL((void*)0);
558 white_src = FALSE0;
559 }
560 else
561 {
562 if (!white_img)
563 {
564 static const pixman_color_t white = { 0xffff, 0xffff, 0xffff, 0xffff };
565
566 if (!(white_img = pixman_image_create_solid_fill_moz_pixman_image_create_solid_fill (&white)))
567 goto out;
568
569 _pixman_image_validate (white_img);
570 }
571
572 src_format = PIXMAN_solid(((0) << 24) | ((1) << 16) | ((0) << 12) | (
(0) << 8) | ((0) << 4) | ((0)));
573 mask_format = glyph_format;
574 info.src_flags = white_img->common.flags;
575 info.mask_flags = glyph_flags | FAST_PATH_SAMPLES_COVER_CLIP_NEAREST(1 << 23);
576 info.src_image = white_img;
577 white_src = TRUE1;
578 }
579
580 _pixman_implementation_lookup_composite (
581 get_implementation(), PIXMAN_OP_ADD,
582 src_format, info.src_flags,
583 mask_format, info.mask_flags,
584 dest_format, dest_flags,
585 &implementation, &func);
586 }
587
588 glyph_box.x1 = glyphs[i].x - glyph->origin_x + off_x;
589 glyph_box.y1 = glyphs[i].y - glyph->origin_y + off_y;
590 glyph_box.x2 = glyph_box.x1 + glyph->image->bits.width;
591 glyph_box.y2 = glyph_box.y1 + glyph->image->bits.height;
592
593 if (box32_intersect (&composite_box, &glyph_box, &dest_box))
594 {
595 int src_x = composite_box.x1 - glyph_box.x1;
596 int src_y = composite_box.y1 - glyph_box.y1;
597
598 if (white_src)
599 info.mask_image = glyph_img;
600 else
601 info.src_image = glyph_img;
602
603 info.mask_x = info.src_x = src_x;
604 info.mask_y = info.src_y = src_y;
605 info.dest_x = composite_box.x1;
606 info.dest_y = composite_box.y1;
607 info.width = composite_box.x2 - composite_box.x1;
608 info.height = composite_box.y2 - composite_box.y1;
609
610 func (implementation, &info);
611
612 pixman_list_move_to_front (&cache->mru, &glyph->mru_link);
613 }
614 }
615
616out:
617 if (white_img)
618 pixman_image_unref_moz_pixman_image_unref (white_img);
619}
620
621/* Conceptually, for each glyph, (white IN glyph) is PIXMAN_OP_ADDed to an
622 * infinitely big mask image at the position such that the glyph origin point
623 * is positioned at the (glyphs[i].x, glyphs[i].y) point.
624 *
625 * Then (mask_x, mask_y) in the infinite mask and (src_x, src_y) in the source
626 * image are both aligned with (dest_x, dest_y) in the destination image. Then
627 * these three images are composited within the
628 *
629 * (dest_x, dest_y, dst_x + width, dst_y + height)
630 *
631 * rectangle.
632 *
633 * TODO:
634 * - Trim the mask to the destination clip/image?
635 * - Trim composite region based on sources, when the op ignores 0s.
636 */
637#if defined(__GNUC__4) && !defined(__x86_64__1) && !defined(__amd64__1)
638__attribute__((__force_align_arg_pointer__))
639#endif
640PIXMAN_EXPORTextern __attribute__((visibility("hidden"))) void
641pixman_composite_glyphs_moz_pixman_composite_glyphs (pixman_op_t op,
642 pixman_image_t *src,
643 pixman_image_t *dest,
644 pixman_format_code_t mask_format,
645 int32_t src_x,
646 int32_t src_y,
647 int32_t mask_x,
648 int32_t mask_y,
649 int32_t dest_x,
650 int32_t dest_y,
651 int32_t width,
652 int32_t height,
653 pixman_glyph_cache_t *cache,
654 int n_glyphs,
655 const pixman_glyph_t *glyphs)
656{
657 pixman_image_t *mask;
658
659 if (!(mask = pixman_image_create_bits_moz_pixman_image_create_bits (mask_format, width, height, NULL((void*)0), -1)))
660 return;
661
662 if (PIXMAN_FORMAT_A (mask_format)(((mask_format >> (12)) & ((1 << (4)) - 1)) <<
((mask_format >> 22) & 3)) != 0 &&
663 PIXMAN_FORMAT_RGB (mask_format)(((mask_format) ) & 0xfff) != 0)
664 {
665 pixman_image_set_component_alpha_moz_pixman_image_set_component_alpha (mask, TRUE1);
666 }
667
668 add_glyphs (cache, mask, - mask_x, - mask_y, n_glyphs, glyphs);
669
670 pixman_image_composite32_moz_pixman_image_composite32 (op, src, mask, dest,
671 src_x, src_y,
672 0, 0,
673 dest_x, dest_y,
674 width, height);
675
676 pixman_image_unref_moz_pixman_image_unref (mask);
677}