pixman/pixman-image.c

   1 /*
   2  * Copyright © 2000 SuSE, Inc.
   3  * Copyright © 2007 Red Hat, Inc.
   4  *
   5  * Permission to use, copy, modify, distribute, and sell this software and its
   6  * documentation for any purpose is hereby granted without fee, provided that
   7  * the above copyright notice appear in all copies and that both that
   8  * copyright notice and this permission notice appear in supporting
   9  * documentation, and that the name of SuSE not be used in advertising or
  10  * publicity pertaining to distribution of the software without specific,
  11  * written prior permission.  SuSE makes no representations about the
  12  * suitability of this software for any purpose.  It is provided "as is"
  13  * without express or implied warranty.
  14  *
  15  * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
  17  * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  18  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  19  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  20  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <stdlib.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30
  31 #include "pixman-private.h"
  32
  33 #define Alpha(x) ((x) >> 24)
  34
  35 pixman_bool_t
  36 _pixman_init_gradient (gradient_t     *gradient,
  37                        const pixman_gradient_stop_t *stops,
  38                        int             n_stops)
  39 {
  40     return_val_if_fail (n_stops > 0, FALSE);
  41
  42     gradient->stops = pixman_malloc_ab (n_stops, sizeof (pixman_gradient_stop_t));
  43     if (!gradient->stops)
  44         return FALSE;
  45
  46     memcpy (gradient->stops, stops, n_stops * sizeof (pixman_gradient_stop_t));
  47
  48     gradient->n_stops = n_stops;
  49
  50     gradient->stop_range = 0xffff;
  51     gradient->color_table = NULL;
  52     gradient->color_table_size = 0;
  53     gradient->common.class = SOURCE_IMAGE_CLASS_UNKNOWN;
  54
  55     return TRUE;
  56 }
  57
  58 pixman_image_t *
  59 _pixman_image_allocate (void)
  60 {
  61     pixman_image_t *image = malloc (sizeof (pixman_image_t));
  62
  63     if (image)
  64     {
  65         image_common_t *common = &image->common;
  66
  67         pixman_region32_init (&common->full_region);
  68         pixman_region32_init (&common->clip_region);
  69         common->src_clip = &common->full_region;
  70         common->has_client_clip = FALSE;
  71         common->transform = NULL;
  72         common->repeat = PIXMAN_REPEAT_NONE;
  73         common->filter = PIXMAN_FILTER_NEAREST;
  74         common->filter_params = NULL;
  75         common->n_filter_params = 0;
  76         common->alpha_map = NULL;
  77         common->component_alpha = FALSE;
  78         common->ref_count = 1;
  79         common->read_func = NULL;
  80         common->write_func = NULL;
  81         common->classify = NULL;
  82     }
  83
  84     return image;
  85 }
  86
  87 source_pict_class_t
  88 _pixman_image_classify (pixman_image_t *image,
  89                         int             x,
  90                         int             y,
  91                         int             width,
  92                         int             height)
  93 {
  94     if (image->common.classify)
  95         return image->common.classify (image, x, y, width, height);
  96     else
  97         return SOURCE_IMAGE_CLASS_UNKNOWN;
  98 }
  99
 100 #define READ_ACCESS(f) ((image->common.read_func)? f##_accessors : f)
 101
 102 static void fbFetchSolid(bits_image_t * image, int x, int y, int width, uint32_t *buffer, uint32_t *mask, uint32_t maskBits)
 103 {
 104     uint32_t color;
 105     uint32_t *end;
 106     fetchPixelProc32 fetch = READ_ACCESS(pixman_fetchPixelProcForPicture32)(image);
 107
 108     color = fetch(image, 0, 0);
 109
 110     end = buffer + width;
 111     while (buffer < end)
 112         *(buffer++) = color;
 113 }
 114
 115 static void fbFetchSolid64(bits_image_t * image, int x, int y, int width, uint64_t *buffer, void *unused, uint32_t unused2)
 116 {
 117     uint64_t color;
 118     uint64_t *end;
 119     fetchPixelProc64 fetch = READ_ACCESS(pixman_fetchPixelProcForPicture64)(image);
 120
 121     color = fetch(image, 0, 0);
 122
 123     end = buffer + width;
 124     while (buffer < end)
 125         *(buffer++) = color;
 126 }
 127
 128 static void fbFetch(bits_image_t * image, int x, int y, int width, uint32_t *buffer, uint32_t *mask, uint32_t maskBits)
 129 {
 130     fetchProc32 fetch = READ_ACCESS(pixman_fetchProcForPicture32)(image);
 131
 132     fetch(image, x, y, width, buffer);
 133 }
 134
 135 static void fbFetch64(bits_image_t * image, int x, int y, int width, uint64_t *buffer, void *unused, uint32_t unused2)
 136 {
 137     fetchProc64 fetch = READ_ACCESS(pixman_fetchProcForPicture64)(image);
 138
 139     fetch(image, x, y, width, buffer);
 140 }
 141
 142 scanFetchProc
 143 _pixman_image_get_fetcher (pixman_image_t *image,
 144                            int             wide)
 145 {
 146     if (IS_SOURCE_IMAGE (image))
 147     {
 148         if (wide)
 149             return (scanFetchProc)pixmanFetchSourcePict64;
 150         else
 151             return (scanFetchProc)pixmanFetchSourcePict;
 152     }
 153     else
 154     {
 155         bits_image_t *bits = (bits_image_t *)image;
 156
 157         if (bits->common.alpha_map)
 158         {
 159             if (wide)
 160                 return (scanFetchProc)READ_ACCESS(fbFetchExternalAlpha64);
 161             else
 162                 return (scanFetchProc)READ_ACCESS(fbFetchExternalAlpha);
 163         }
 164         else if ((bits->common.repeat != PIXMAN_REPEAT_NONE) &&
 165                  bits->width == 1 &&
 166                  bits->height == 1)
 167         {
 168             if (wide)
 169                 return (scanFetchProc)fbFetchSolid64;
 170             else
 171                 return (scanFetchProc)fbFetchSolid;
 172         }
 173         else if (!bits->common.transform && bits->common.filter != PIXMAN_FILTER_CONVOLUTION
 174                 && bits->common.repeat != PIXMAN_REPEAT_PAD && bits->common.repeat != PIXMAN_REPEAT_REFLECT)
 175         {
 176             if (wide)
 177                 return (scanFetchProc)fbFetch64;
 178             else
 179                 return (scanFetchProc)fbFetch;
 180         }
 181         else
 182         {
 183             if (wide)
 184                 return (scanFetchProc)READ_ACCESS(fbFetchTransformed64);
 185             else
 186                 return (scanFetchProc)READ_ACCESS(fbFetchTransformed);
 187         }
 188     }
 189 }
 190
 191
 192
 193 #define WRITE_ACCESS(f) ((image->common.write_func)? f##_accessors : f)
 194
 195 static void
 196 fbStore(bits_image_t * image, int x, int y, int width, uint32_t *buffer)
 197 {
 198     uint32_t *bits;
 199     int32_t stride;
 200     storeProc32 store = WRITE_ACCESS(pixman_storeProcForPicture32)(image);
 201     const pixman_indexed_t * indexed = image->indexed;
 202
 203     bits = image->bits;
 204     stride = image->rowstride;
 205     bits += y*stride;
 206     store((pixman_image_t *)image, bits, buffer, x, width, indexed);
 207 }
 208
 209 static void
 210 fbStore64(bits_image_t * image, int x, int y, int width, uint64_t *buffer)
 211 {
 212     uint32_t *bits;
 213     int32_t stride;
 214     storeProc64 store = WRITE_ACCESS(pixman_storeProcForPicture64)(image);
 215     const pixman_indexed_t * indexed = image->indexed;
 216
 217     bits = image->bits;
 218     stride = image->rowstride;
 219     bits += y*stride;
 220     store((pixman_image_t *)image, bits, buffer, x, width, indexed);
 221 }
 222
 223 scanStoreProc
 224 _pixman_image_get_storer (pixman_image_t *image,
 225                           int             wide)
 226 {
 227     if (image->common.alpha_map)
 228     {
 229         if (wide)
 230             return (scanStoreProc)WRITE_ACCESS(fbStoreExternalAlpha64);
 231         else
 232             return (scanStoreProc)WRITE_ACCESS(fbStoreExternalAlpha);
 233     }
 234     else
 235     {
 236         if (wide)
 237             return (scanStoreProc)fbStore64;
 238         else
 239             return (scanStoreProc)fbStore;
 240     }
 241 }
 242
 243 /* Ref Counting */
 244 PIXMAN_EXPORT pixman_image_t *
 245 pixman_image_ref (pixman_image_t *image)
 246 {
 247     image->common.ref_count++;
 248
 249     return image;
 250 }
 251
 252 /* returns TRUE when the image is freed */
 253 PIXMAN_EXPORT pixman_bool_t
 254 pixman_image_unref (pixman_image_t *image)
 255 {
 256     image_common_t *common = (image_common_t *)image;
 257
 258     common->ref_count--;
 259
 260     if (common->ref_count == 0)
 261     {
 262         pixman_region32_fini (&common->clip_region);
 263         pixman_region32_fini (&common->full_region);
 264
 265         if (common->transform)
 266             free (common->transform);
 267
 268         if (common->filter_params)
 269             free (common->filter_params);
 270
 271         if (common->alpha_map)
 272             pixman_image_unref ((pixman_image_t *)common->alpha_map);
 273
 274 #if 0
 275         if (image->type == BITS && image->bits.indexed)
 276             free (image->bits.indexed);
 277 #endif
 278
 279 #if 0
 280         memset (image, 0xaa, sizeof (pixman_image_t));
 281 #endif
 282         if (image->type == LINEAR || image->type == RADIAL || image->type == CONICAL)
 283         {
 284             if (image->gradient.stops)
 285                 free (image->gradient.stops);
 286         }
 287
 288
 289         if (image->type == BITS && image->bits.free_me)
 290             free (image->bits.free_me);
 291
 292         free (image);
 293
 294         return TRUE;
 295     }
 296
 297     return FALSE;
 298 }
 299
 300 /* Constructors */
 301
 302 static uint32_t *
 303 create_bits (pixman_format_code_t format,
 304              int                  width,
 305              int                  height,
 306              int                 *rowstride_bytes)
 307 {
 308     int stride;
 309     int buf_size;
 310     int bpp;
 311
 312     /* what follows is a long-winded way, avoiding any possibility of integer
 313      * overflows, of saying:
 314      * stride = ((width * bpp + FB_MASK) >> FB_SHIFT) * sizeof (uint32_t);
 315      */
 316
 317     bpp = PIXMAN_FORMAT_BPP (format);
 318     if (pixman_multiply_overflows_int (width, bpp))
 319         return NULL;
 320
 321     stride = width * bpp;
 322     if (pixman_addition_overflows_int (stride, FB_MASK))
 323         return NULL;
 324
 325     stride += FB_MASK;
 326     stride >>= FB_SHIFT;
 327
 328 #if FB_SHIFT < 2
 329     if (pixman_multiply_overflows_int (stride, sizeof (uint32_t)))
 330         return NULL;
 331 #endif
 332     stride *= sizeof (uint32_t);
 333
 334     if (pixman_multiply_overflows_int (height, stride))
 335         return NULL;
 336
 337     buf_size = height * stride;
 338
 339     if (rowstride_bytes)
 340         *rowstride_bytes = stride;
 341
 342     return calloc (buf_size, 1);
 343 }
 344
 345 static void
 346 reset_clip_region (pixman_image_t *image)
 347 {
 348     pixman_region32_fini (&image->common.clip_region);
 349
 350     if (image->type == BITS)
 351     {
 352         pixman_region32_init_rect (&image->common.clip_region, 0, 0,
 353                                    image->bits.width, image->bits.height);
 354     }
 355     else
 356     {
 357         pixman_region32_init (&image->common.clip_region);
 358     }
 359 }
 360
 361 PIXMAN_EXPORT pixman_image_t *
 362 pixman_image_create_bits (pixman_format_code_t  format,
 363                           int                   width,
 364                           int                   height,
 365                           uint32_t             *bits,
 366                           int                   rowstride_bytes)
 367 {
 368     pixman_image_t *image;
 369     uint32_t *free_me = NULL;
 370
 371     /* must be a whole number of uint32_t's
 372      */
 373     return_val_if_fail (bits == NULL ||
 374                         (rowstride_bytes % sizeof (uint32_t)) == 0, NULL);
 375
 376     if (!bits && width && height)
 377     {
 378         free_me = bits = create_bits (format, width, height, &rowstride_bytes);
 379         if (!bits)
 380             return NULL;
 381     }
 382
 383     image = _pixman_image_allocate();
 384
 385     if (!image) {
 386         if (free_me)
 387             free (free_me);
 388         return NULL;
 389     }
 390
 391     image->type = BITS;
 392     image->bits.format = format;
 393     image->bits.width = width;
 394     image->bits.height = height;
 395     image->bits.bits = bits;
 396     image->bits.free_me = free_me;
 397
 398     image->bits.rowstride = rowstride_bytes / (int) sizeof (uint32_t); /* we store it in number
 399                                                                   * of uint32_t's
 400                                                                   */
 401     image->bits.indexed = NULL;
 402
 403     pixman_region32_fini (&image->common.full_region);
 404     pixman_region32_init_rect (&image->common.full_region, 0, 0,
 405                                image->bits.width, image->bits.height);
 406
 407     reset_clip_region (image);
 408     return image;
 409 }
 410
 411 PIXMAN_EXPORT pixman_bool_t
 412 pixman_image_set_clip_region32 (pixman_image_t *image,
 413                                 pixman_region32_t *region)
 414 {
 415     image_common_t *common = (image_common_t *)image;
 416
 417     if (region)
 418     {
 419         return pixman_region32_copy (&common->clip_region, region);
 420     }
 421     else
 422     {
 423         reset_clip_region (image);
 424
 425         return TRUE;
 426     }
 427 }
 428
 429
 430 PIXMAN_EXPORT pixman_bool_t
 431 pixman_image_set_clip_region (pixman_image_t    *image,
 432                               pixman_region16_t *region)
 433 {
 434     image_common_t *common = (image_common_t *)image;
 435
 436     if (region)
 437     {
 438         return pixman_region32_copy_from_region16 (&common->clip_region, region);
 439     }
 440     else
 441     {
 442         reset_clip_region (image);
 443
 444         return TRUE;
 445     }
 446 }
 447
 448 /* Sets whether the clip region includes a clip region set by the client
 449  */
 450 PIXMAN_EXPORT void
 451 pixman_image_set_has_client_clip (pixman_image_t *image,
 452                                   pixman_bool_t   client_clip)
 453 {
 454     image->common.has_client_clip = client_clip;
 455 }
 456
 457 PIXMAN_EXPORT pixman_bool_t
 458 pixman_image_set_transform (pixman_image_t           *image,
 459                             const pixman_transform_t *transform)
 460 {
 461     static const pixman_transform_t id =
 462     {
 463         { { pixman_fixed_1, 0, 0 },
 464           { 0, pixman_fixed_1, 0 },
 465           { 0, 0, pixman_fixed_1 }
 466         }
 467     };
 468
 469     image_common_t *common = (image_common_t *)image;
 470
 471     if (common->transform == transform)
 472         return TRUE;
 473
 474     if (memcmp (&id, transform, sizeof (pixman_transform_t)) == 0)
 475     {
 476         free(common->transform);
 477         common->transform = NULL;
 478         return TRUE;
 479     }
 480
 481     if (common->transform == NULL)
 482         common->transform = malloc (sizeof (pixman_transform_t));
 483     if (common->transform == NULL)
 484         return FALSE;
 485
 486     memcpy(common->transform, transform, sizeof(pixman_transform_t));
 487
 488     return TRUE;
 489 }
 490
 491 PIXMAN_EXPORT void
 492 pixman_image_set_repeat (pixman_image_t  *image,
 493                          pixman_repeat_t  repeat)
 494 {
 495     image->common.repeat = repeat;
 496 }
 497
 498 PIXMAN_EXPORT pixman_bool_t
 499 pixman_image_set_filter (pixman_image_t       *image,
 500                          pixman_filter_t       filter,
 501                          const pixman_fixed_t *params,
 502                          int                   n_params)
 503 {
 504     image_common_t *common = (image_common_t *)image;
 505     pixman_fixed_t *new_params;
 506
 507     if (params == common->filter_params && filter == common->filter)
 508         return TRUE;
 509
 510     new_params = NULL;
 511     if (params)
 512     {
 513         new_params = pixman_malloc_ab (n_params, sizeof (pixman_fixed_t));
 514         if (!new_params)
 515             return FALSE;
 516
 517         memcpy (new_params,
 518                 params, n_params * sizeof (pixman_fixed_t));
 519     }
 520
 521     common->filter = filter;
 522
 523     if (common->filter_params)
 524         free (common->filter_params);
 525
 526     common->filter_params = new_params;
 527     common->n_filter_params = n_params;
 528     return TRUE;
 529 }
 530
 531 PIXMAN_EXPORT void
 532 pixman_image_set_source_clipping (pixman_image_t  *image,
 533                                   pixman_bool_t    source_clipping)
 534 {
 535     image_common_t *common = &image->common;
 536
 537     if (source_clipping)
 538         common->src_clip = &common->clip_region;
 539     else
 540         common->src_clip = &common->full_region;
 541 }
 542
 543 /* Unlike all the other property setters, this function does not
 544  * copy the content of indexed. Doing this copying is simply
 545  * way, way too expensive.
 546  */
 547 PIXMAN_EXPORT void
 548 pixman_image_set_indexed (pixman_image_t         *image,
 549                           const pixman_indexed_t *indexed)
 550 {
 551     bits_image_t *bits = (bits_image_t *)image;
 552
 553     bits->indexed = indexed;
 554 }
 555
 556 PIXMAN_EXPORT void
 557 pixman_image_set_alpha_map (pixman_image_t *image,
 558                             pixman_image_t *alpha_map,
 559                             int16_t         x,
 560                             int16_t         y)
 561 {
 562     image_common_t *common = (image_common_t *)image;
 563
 564     return_if_fail (!alpha_map || alpha_map->type == BITS);
 565
 566     if (common->alpha_map != (bits_image_t *)alpha_map)
 567     {
 568         if (common->alpha_map)
 569             pixman_image_unref ((pixman_image_t *)common->alpha_map);
 570
 571         if (alpha_map)
 572             common->alpha_map = (bits_image_t *)pixman_image_ref (alpha_map);
 573         else
 574             common->alpha_map = NULL;
 575     }
 576
 577     common->alpha_origin.x = x;
 578     common->alpha_origin.y = y;
 579 }
 580
 581 PIXMAN_EXPORT void
 582 pixman_image_set_component_alpha   (pixman_image_t       *image,
 583                                     pixman_bool_t         component_alpha)
 584 {
 585     image->common.component_alpha = component_alpha;
 586 }
 587
 588
 589 PIXMAN_EXPORT void
 590 pixman_image_set_accessors (pixman_image_t             *image,
 591                             pixman_read_memory_func_t   read_func,
 592                             pixman_write_memory_func_t  write_func)
 593 {
 594     return_if_fail (image != NULL);
 595
 596     image->common.read_func = read_func;
 597     image->common.write_func = write_func;
 598 }
 599
 600 PIXMAN_EXPORT uint32_t *
 601 pixman_image_get_data (pixman_image_t *image)
 602 {
 603     if (image->type == BITS)
 604         return image->bits.bits;
 605
 606     return NULL;
 607 }
 608
 609 PIXMAN_EXPORT int
 610 pixman_image_get_width (pixman_image_t *image)
 611 {
 612     if (image->type == BITS)
 613         return image->bits.width;
 614
 615     return 0;
 616 }
 617
 618 PIXMAN_EXPORT int
 619 pixman_image_get_height (pixman_image_t *image)
 620 {
 621     if (image->type == BITS)
 622         return image->bits.height;
 623
 624     return 0;
 625 }
 626
 627 PIXMAN_EXPORT int
 628 pixman_image_get_stride (pixman_image_t *image)
 629 {
 630     if (image->type == BITS)
 631         return image->bits.rowstride * (int) sizeof (uint32_t);
 632
 633     return 0;
 634 }
 635
 636 PIXMAN_EXPORT int
 637 pixman_image_get_depth (pixman_image_t *image)
 638 {
 639     if (image->type == BITS)
 640         return PIXMAN_FORMAT_DEPTH (image->bits.format);
 641
 642     return 0;
 643 }
 644
 645 static uint32_t
 646 color_to_uint32 (const pixman_color_t *color)
 647 {
 648     return
 649         (color->alpha >> 8 << 24) |
 650         (color->red >> 8 << 16) |
 651         (color->green & 0xff00) |
 652         (color->blue >> 8);
 653 }
 654
 655 static pixman_bool_t
 656 color_to_pixel (pixman_color_t *color,
 657                 uint32_t       *pixel,
 658                 pixman_format_code_t format)
 659 {
 660     uint32_t c = color_to_uint32 (color);
 661
 662     if (!(format == PIXMAN_a8r8g8b8     ||
 663           format == PIXMAN_x8r8g8b8     ||
 664           format == PIXMAN_a8b8g8r8     ||
 665           format == PIXMAN_x8b8g8r8     ||
 666           format == PIXMAN_b8g8r8a8     ||
 667           format == PIXMAN_b8g8r8x8     ||
 668           format == PIXMAN_r5g6b5       ||
 669           format == PIXMAN_b5g6r5       ||
 670           format == PIXMAN_a8))
 671     {
 672         return FALSE;
 673     }
 674
 675     if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_ABGR)
 676     {
 677         c = ((c & 0xff000000) >>  0) |
 678             ((c & 0x00ff0000) >> 16) |
 679             ((c & 0x0000ff00) >>  0) |
 680             ((c & 0x000000ff) << 16);
 681     }
 682     if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_BGRA)
 683     {
 684         c = ((c & 0xff000000) >> 24) |
 685             ((c & 0x00ff0000) >>  8) |
 686             ((c & 0x0000ff00) <<  8) |
 687             ((c & 0x000000ff) << 24);
 688     }
 689
 690     if (format == PIXMAN_a8)
 691         c = c >> 24;
 692     else if (format == PIXMAN_r5g6b5 ||
 693              format == PIXMAN_b5g6r5)
 694         c = cvt8888to0565 (c);
 695
 696 #if 0
 697     printf ("color: %x %x %x %x\n", color->alpha, color->red, color->green, color->blue);
 698     printf ("pixel: %x\n", c);
 699 #endif
 700
 701     *pixel = c;
 702     return TRUE;
 703 }
 704
 705 PIXMAN_EXPORT pixman_bool_t
 706 pixman_image_fill_rectangles (pixman_op_t                   op,
 707                               pixman_image_t               *dest,
 708                               pixman_color_t               *color,
 709                               int                           n_rects,
 710                               const pixman_rectangle16_t   *rects)
 711 {
 712     pixman_image_t *solid;
 713     pixman_color_t c;
 714     int i;
 715
 716     if (color->alpha == 0xffff)
 717     {
 718         if (op == PIXMAN_OP_OVER)
 719             op = PIXMAN_OP_SRC;
 720     }
 721
 722     if (op == PIXMAN_OP_CLEAR)
 723     {
 724         c.red = 0;
 725         c.green = 0;
 726         c.blue = 0;
 727         c.alpha = 0;
 728
 729         color = &c;
 730
 731         op = PIXMAN_OP_SRC;
 732     }
 733
 734     if (op == PIXMAN_OP_SRC)
 735     {
 736         uint32_t pixel;
 737
 738         if (color_to_pixel (color, &pixel, dest->bits.format))
 739         {
 740             for (i = 0; i < n_rects; ++i)
 741             {
 742                 pixman_region32_t fill_region;
 743                 int n_boxes, j;
 744                 pixman_box32_t *boxes;
 745
 746                 pixman_region32_init_rect (&fill_region, rects[i].x, rects[i].y, rects[i].width, rects[i].height);
 747                 if (!pixman_region32_intersect (&fill_region,
 748                                                 &fill_region,
 749                                                 &dest->common.clip_region))
 750                     return FALSE;
 751
 752
 753                 boxes = pixman_region32_rectangles (&fill_region, &n_boxes);
 754                 for (j = 0; j < n_boxes; ++j)
 755                 {
 756                     const pixman_box32_t *box = &(boxes[j]);
 757                     pixman_fill (dest->bits.bits, dest->bits.rowstride, PIXMAN_FORMAT_BPP (dest->bits.format),
 758                                  box->x1, box->y1, box->x2 - box->x1, box->y2 - box->y1,
 759                                  pixel);
 760                 }
 761
 762                 pixman_region32_fini (&fill_region);
 763             }
 764             return TRUE;
 765         }
 766     }
 767
 768     solid = pixman_image_create_solid_fill (color);
 769     if (!solid)
 770         return FALSE;
 771
 772     for (i = 0; i < n_rects; ++i)
 773     {
 774         const pixman_rectangle16_t *rect = &(rects[i]);
 775
 776         pixman_image_composite (op, solid, NULL, dest,
 777                                 0, 0, 0, 0,
 778                                 rect->x, rect->y,
 779                                 rect->width, rect->height);
 780     }
 781
 782     pixman_image_unref (solid);
 783
 784     return TRUE;
 785 }
 786
 787 pixman_bool_t
 788 pixman_image_can_get_solid (pixman_image_t *image)
 789 {
 790     if (image->type == SOLID)
 791         return TRUE;
 792
 793     if (image->type != BITS     ||
 794         image->bits.width != 1  ||
 795         image->bits.height != 1)
 796     {
 797         return FALSE;
 798     }
 799
 800     if (image->common.repeat != PIXMAN_REPEAT_NORMAL)
 801         return FALSE;
 802
 803     switch (image->bits.format)
 804     {
 805     case PIXMAN_a8r8g8b8:
 806     case PIXMAN_x8r8g8b8:
 807     case PIXMAN_a8b8g8r8:
 808     case PIXMAN_x8b8g8r8:
 809     case PIXMAN_b8g8r8a8:
 810     case PIXMAN_b8g8r8x8:
 811     case PIXMAN_r8g8b8:
 812     case PIXMAN_b8g8r8:
 813     case PIXMAN_r5g6b5:
 814     case PIXMAN_b5g6r5:
 815         return TRUE;
 816     default:
 817         return FALSE;
 818     }
 819 }
 820
 821 pixman_bool_t
 822 pixman_image_is_opaque(pixman_image_t *image)
 823 {
 824     int i = 0;
 825     int gradientNumberOfColors = 0;
 826
 827     if(image->common.alpha_map)
 828         return FALSE;
 829
 830     switch(image->type)
 831     {
 832     case BITS:
 833         if(PIXMAN_FORMAT_A(image->bits.format))
 834             return FALSE;
 835         break;
 836
 837     case LINEAR:
 838     case CONICAL:
 839     case RADIAL:
 840         gradientNumberOfColors = image->gradient.n_stops;
 841         i=0;
 842         while(i<gradientNumberOfColors)
 843         {
 844             if(image->gradient.stops[i].color.alpha != 0xffff)
 845                 return FALSE;
 846             i++;
 847         }
 848         break;
 849
 850     case SOLID:
 851          if(Alpha(image->solid.color) != 0xff)
 852             return FALSE;
 853         break;
 854     }
 855
 856     /* Convolution filters can introduce translucency if the sum of the weights
 857        is lower than 1. */
 858     if (image->common.filter == PIXMAN_FILTER_CONVOLUTION)
 859          return FALSE;
 860
 861     if (image->common.repeat == PIXMAN_REPEAT_NONE)
 862     {
 863         if (image->common.filter != PIXMAN_FILTER_NEAREST)
 864             return FALSE;
 865
 866         if (image->common.transform)
 867             return FALSE;
 868
 869         /* Gradients do not necessarily cover the entire compositing area */
 870         if (image->type == LINEAR || image->type == CONICAL || image->type == RADIAL)
 871             return FALSE;
 872     }
 873
 874      return TRUE;
 875 }