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 static void
 244 image_property_changed (pixman_image_t *image)
 245 {
 246     image->common.property_changed (image);
 247 }
 248
 249 /* Ref Counting */
 250 PIXMAN_EXPORT pixman_image_t *
 251 pixman_image_ref (pixman_image_t *image)
 252 {
 253     image->common.ref_count++;
 254
 255     return image;
 256 }
 257
 258 /* returns TRUE when the image is freed */
 259 PIXMAN_EXPORT pixman_bool_t
 260 pixman_image_unref (pixman_image_t *image)
 261 {
 262     image_common_t *common = (image_common_t *)image;
 263
 264     common->ref_count--;
 265
 266     if (common->ref_count == 0)
 267     {
 268         pixman_region32_fini (&common->clip_region);
 269         pixman_region32_fini (&common->full_region);
 270
 271         if (common->transform)
 272             free (common->transform);
 273
 274         if (common->filter_params)
 275             free (common->filter_params);
 276
 277         if (common->alpha_map)
 278             pixman_image_unref ((pixman_image_t *)common->alpha_map);
 279
 280 #if 0
 281         if (image->type == BITS && image->bits.indexed)
 282             free (image->bits.indexed);
 283 #endif
 284
 285 #if 0
 286         memset (image, 0xaa, sizeof (pixman_image_t));
 287 #endif
 288         if (image->type == LINEAR || image->type == RADIAL || image->type == CONICAL)
 289         {
 290             if (image->gradient.stops)
 291                 free (image->gradient.stops);
 292         }
 293
 294
 295         if (image->type == BITS && image->bits.free_me)
 296             free (image->bits.free_me);
 297
 298         free (image);
 299
 300         return TRUE;
 301     }
 302
 303     return FALSE;
 304 }
 305
 306 /* Constructors */
 307
 308 void
 309 _pixman_image_reset_clip_region (pixman_image_t *image)
 310 {
 311     pixman_region32_fini (&image->common.clip_region);
 312
 313     if (image->type == BITS)
 314     {
 315         pixman_region32_init_rect (&image->common.clip_region, 0, 0,
 316                                    image->bits.width, image->bits.height);
 317     }
 318     else
 319     {
 320         pixman_region32_init (&image->common.clip_region);
 321     }
 322 }
 323
 324 PIXMAN_EXPORT pixman_bool_t
 325 pixman_image_set_clip_region32 (pixman_image_t *image,
 326                                 pixman_region32_t *region)
 327 {
 328     image_common_t *common = (image_common_t *)image;
 329     pixman_bool_t result;
 330
 331     if (region)
 332     {
 333         result = pixman_region32_copy (&common->clip_region, region);
 334     }
 335     else
 336     {
 337         _pixman_image_reset_clip_region (image);
 338
 339         result = TRUE;
 340     }
 341
 342     image_property_changed (image);
 343
 344     return result;
 345 }
 346
 347
 348 PIXMAN_EXPORT pixman_bool_t
 349 pixman_image_set_clip_region (pixman_image_t    *image,
 350                               pixman_region16_t *region)
 351 {
 352     image_common_t *common = (image_common_t *)image;
 353     pixman_bool_t result;
 354
 355     if (region)
 356     {
 357         result = pixman_region32_copy_from_region16 (&common->clip_region, region);
 358     }
 359     else
 360     {
 361         _pixman_image_reset_clip_region (image);
 362
 363         result = TRUE;
 364     }
 365
 366     image_property_changed (image);
 367
 368     return result;
 369 }
 370
 371 /* Sets whether the clip region includes a clip region set by the client
 372  */
 373 PIXMAN_EXPORT void
 374 pixman_image_set_has_client_clip (pixman_image_t *image,
 375                                   pixman_bool_t   client_clip)
 376 {
 377     image->common.has_client_clip = client_clip;
 378
 379     image_property_changed (image);
 380 }
 381
 382 PIXMAN_EXPORT pixman_bool_t
 383 pixman_image_set_transform (pixman_image_t           *image,
 384                             const pixman_transform_t *transform)
 385 {
 386     static const pixman_transform_t id =
 387     {
 388         { { pixman_fixed_1, 0, 0 },
 389           { 0, pixman_fixed_1, 0 },
 390           { 0, 0, pixman_fixed_1 }
 391         }
 392     };
 393
 394     image_common_t *common = (image_common_t *)image;
 395     pixman_bool_t result;
 396
 397     if (common->transform == transform)
 398         return TRUE;
 399
 400     if (memcmp (&id, transform, sizeof (pixman_transform_t)) == 0)
 401     {
 402         free(common->transform);
 403         common->transform = NULL;
 404         result = TRUE;
 405         goto out;
 406     }
 407
 408     if (common->transform == NULL)
 409         common->transform = malloc (sizeof (pixman_transform_t));
 410
 411     if (common->transform == NULL)
 412     {
 413         result = FALSE;
 414         goto out;
 415     }
 416
 417     memcpy(common->transform, transform, sizeof(pixman_transform_t));
 418
 419 out:
 420     image_property_changed (image);
 421
 422     return TRUE;
 423 }
 424
 425 PIXMAN_EXPORT void
 426 pixman_image_set_repeat (pixman_image_t  *image,
 427                          pixman_repeat_t  repeat)
 428 {
 429     image->common.repeat = repeat;
 430
 431     image_property_changed (image);
 432 }
 433
 434 PIXMAN_EXPORT pixman_bool_t
 435 pixman_image_set_filter (pixman_image_t       *image,
 436                          pixman_filter_t       filter,
 437                          const pixman_fixed_t *params,
 438                          int                   n_params)
 439 {
 440     image_common_t *common = (image_common_t *)image;
 441     pixman_fixed_t *new_params;
 442
 443     if (params == common->filter_params && filter == common->filter)
 444         return TRUE;
 445
 446     new_params = NULL;
 447     if (params)
 448     {
 449         new_params = pixman_malloc_ab (n_params, sizeof (pixman_fixed_t));
 450         if (!new_params)
 451             return FALSE;
 452
 453         memcpy (new_params,
 454                 params, n_params * sizeof (pixman_fixed_t));
 455     }
 456
 457     common->filter = filter;
 458
 459     if (common->filter_params)
 460         free (common->filter_params);
 461
 462     common->filter_params = new_params;
 463     common->n_filter_params = n_params;
 464
 465     image_property_changed (image);
 466     return TRUE;
 467 }
 468
 469 PIXMAN_EXPORT void
 470 pixman_image_set_source_clipping (pixman_image_t  *image,
 471                                   pixman_bool_t    source_clipping)
 472 {
 473     image_common_t *common = &image->common;
 474
 475     if (source_clipping)
 476         common->src_clip = &common->clip_region;
 477     else
 478         common->src_clip = &common->full_region;
 479
 480     image_property_changed (image);
 481 }
 482
 483 /* Unlike all the other property setters, this function does not
 484  * copy the content of indexed. Doing this copying is simply
 485  * way, way too expensive.
 486  */
 487 PIXMAN_EXPORT void
 488 pixman_image_set_indexed (pixman_image_t         *image,
 489                           const pixman_indexed_t *indexed)
 490 {
 491     bits_image_t *bits = (bits_image_t *)image;
 492
 493     bits->indexed = indexed;
 494
 495     image_property_changed (image);
 496 }
 497
 498 PIXMAN_EXPORT void
 499 pixman_image_set_alpha_map (pixman_image_t *image,
 500                             pixman_image_t *alpha_map,
 501                             int16_t         x,
 502                             int16_t         y)
 503 {
 504     image_common_t *common = (image_common_t *)image;
 505
 506     return_if_fail (!alpha_map || alpha_map->type == BITS);
 507
 508     if (common->alpha_map != (bits_image_t *)alpha_map)
 509     {
 510         if (common->alpha_map)
 511             pixman_image_unref ((pixman_image_t *)common->alpha_map);
 512
 513         if (alpha_map)
 514             common->alpha_map = (bits_image_t *)pixman_image_ref (alpha_map);
 515         else
 516             common->alpha_map = NULL;
 517     }
 518
 519     common->alpha_origin.x = x;
 520     common->alpha_origin.y = y;
 521
 522     image_property_changed (image);
 523 }
 524
 525 PIXMAN_EXPORT void
 526 pixman_image_set_component_alpha   (pixman_image_t       *image,
 527                                     pixman_bool_t         component_alpha)
 528 {
 529     image->common.component_alpha = component_alpha;
 530
 531     image_property_changed (image);
 532 }
 533
 534
 535 PIXMAN_EXPORT void
 536 pixman_image_set_accessors (pixman_image_t             *image,
 537                             pixman_read_memory_func_t   read_func,
 538                             pixman_write_memory_func_t  write_func)
 539 {
 540     return_if_fail (image != NULL);
 541
 542     image->common.read_func = read_func;
 543     image->common.write_func = write_func;
 544
 545     image_property_changed (image);
 546 }
 547
 548 PIXMAN_EXPORT uint32_t *
 549 pixman_image_get_data (pixman_image_t *image)
 550 {
 551     if (image->type == BITS)
 552         return image->bits.bits;
 553
 554     return NULL;
 555 }
 556
 557 PIXMAN_EXPORT int
 558 pixman_image_get_width (pixman_image_t *image)
 559 {
 560     if (image->type == BITS)
 561         return image->bits.width;
 562
 563     return 0;
 564 }
 565
 566 PIXMAN_EXPORT int
 567 pixman_image_get_height (pixman_image_t *image)
 568 {
 569     if (image->type == BITS)
 570         return image->bits.height;
 571
 572     return 0;
 573 }
 574
 575 PIXMAN_EXPORT int
 576 pixman_image_get_stride (pixman_image_t *image)
 577 {
 578     if (image->type == BITS)
 579         return image->bits.rowstride * (int) sizeof (uint32_t);
 580
 581     return 0;
 582 }
 583
 584 PIXMAN_EXPORT int
 585 pixman_image_get_depth (pixman_image_t *image)
 586 {
 587     if (image->type == BITS)
 588         return PIXMAN_FORMAT_DEPTH (image->bits.format);
 589
 590     return 0;
 591 }
 592
 593 static uint32_t
 594 color_to_uint32 (const pixman_color_t *color)
 595 {
 596     return
 597         (color->alpha >> 8 << 24) |
 598         (color->red >> 8 << 16) |
 599         (color->green & 0xff00) |
 600         (color->blue >> 8);
 601 }
 602
 603 static pixman_bool_t
 604 color_to_pixel (pixman_color_t *color,
 605                 uint32_t       *pixel,
 606                 pixman_format_code_t format)
 607 {
 608     uint32_t c = color_to_uint32 (color);
 609
 610     if (!(format == PIXMAN_a8r8g8b8     ||
 611           format == PIXMAN_x8r8g8b8     ||
 612           format == PIXMAN_a8b8g8r8     ||
 613           format == PIXMAN_x8b8g8r8     ||
 614           format == PIXMAN_b8g8r8a8     ||
 615           format == PIXMAN_b8g8r8x8     ||
 616           format == PIXMAN_r5g6b5       ||
 617           format == PIXMAN_b5g6r5       ||
 618           format == PIXMAN_a8))
 619     {
 620         return FALSE;
 621     }
 622
 623     if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_ABGR)
 624     {
 625         c = ((c & 0xff000000) >>  0) |
 626             ((c & 0x00ff0000) >> 16) |
 627             ((c & 0x0000ff00) >>  0) |
 628             ((c & 0x000000ff) << 16);
 629     }
 630     if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_BGRA)
 631     {
 632         c = ((c & 0xff000000) >> 24) |
 633             ((c & 0x00ff0000) >>  8) |
 634             ((c & 0x0000ff00) <<  8) |
 635             ((c & 0x000000ff) << 24);
 636     }
 637
 638     if (format == PIXMAN_a8)
 639         c = c >> 24;
 640     else if (format == PIXMAN_r5g6b5 ||
 641              format == PIXMAN_b5g6r5)
 642         c = cvt8888to0565 (c);
 643
 644 #if 0
 645     printf ("color: %x %x %x %x\n", color->alpha, color->red, color->green, color->blue);
 646     printf ("pixel: %x\n", c);
 647 #endif
 648
 649     *pixel = c;
 650     return TRUE;
 651 }
 652
 653 PIXMAN_EXPORT pixman_bool_t
 654 pixman_image_fill_rectangles (pixman_op_t                   op,
 655                               pixman_image_t               *dest,
 656                               pixman_color_t               *color,
 657                               int                           n_rects,
 658                               const pixman_rectangle16_t   *rects)
 659 {
 660     pixman_image_t *solid;
 661     pixman_color_t c;
 662     int i;
 663
 664     if (color->alpha == 0xffff)
 665     {
 666         if (op == PIXMAN_OP_OVER)
 667             op = PIXMAN_OP_SRC;
 668     }
 669
 670     if (op == PIXMAN_OP_CLEAR)
 671     {
 672         c.red = 0;
 673         c.green = 0;
 674         c.blue = 0;
 675         c.alpha = 0;
 676
 677         color = &c;
 678
 679         op = PIXMAN_OP_SRC;
 680     }
 681
 682     if (op == PIXMAN_OP_SRC)
 683     {
 684         uint32_t pixel;
 685
 686         if (color_to_pixel (color, &pixel, dest->bits.format))
 687         {
 688             for (i = 0; i < n_rects; ++i)
 689             {
 690                 pixman_region32_t fill_region;
 691                 int n_boxes, j;
 692                 pixman_box32_t *boxes;
 693
 694                 pixman_region32_init_rect (&fill_region, rects[i].x, rects[i].y, rects[i].width, rects[i].height);
 695                 if (!pixman_region32_intersect (&fill_region,
 696                                                 &fill_region,
 697                                                 &dest->common.clip_region))
 698                     return FALSE;
 699
 700
 701                 boxes = pixman_region32_rectangles (&fill_region, &n_boxes);
 702                 for (j = 0; j < n_boxes; ++j)
 703                 {
 704                     const pixman_box32_t *box = &(boxes[j]);
 705                     pixman_fill (dest->bits.bits, dest->bits.rowstride, PIXMAN_FORMAT_BPP (dest->bits.format),
 706                                  box->x1, box->y1, box->x2 - box->x1, box->y2 - box->y1,
 707                                  pixel);
 708                 }
 709
 710                 pixman_region32_fini (&fill_region);
 711             }
 712             return TRUE;
 713         }
 714     }
 715
 716     solid = pixman_image_create_solid_fill (color);
 717     if (!solid)
 718         return FALSE;
 719
 720     for (i = 0; i < n_rects; ++i)
 721     {
 722         const pixman_rectangle16_t *rect = &(rects[i]);
 723
 724         pixman_image_composite (op, solid, NULL, dest,
 725                                 0, 0, 0, 0,
 726                                 rect->x, rect->y,
 727                                 rect->width, rect->height);
 728     }
 729
 730     pixman_image_unref (solid);
 731
 732     return TRUE;
 733 }
 734
 735 pixman_bool_t
 736 pixman_image_can_get_solid (pixman_image_t *image)
 737 {
 738     if (image->type == SOLID)
 739         return TRUE;
 740
 741     if (image->type != BITS     ||
 742         image->bits.width != 1  ||
 743         image->bits.height != 1)
 744     {
 745         return FALSE;
 746     }
 747
 748     if (image->common.repeat != PIXMAN_REPEAT_NORMAL)
 749         return FALSE;
 750
 751     switch (image->bits.format)
 752     {
 753     case PIXMAN_a8r8g8b8:
 754     case PIXMAN_x8r8g8b8:
 755     case PIXMAN_a8b8g8r8:
 756     case PIXMAN_x8b8g8r8:
 757     case PIXMAN_b8g8r8a8:
 758     case PIXMAN_b8g8r8x8:
 759     case PIXMAN_r8g8b8:
 760     case PIXMAN_b8g8r8:
 761     case PIXMAN_r5g6b5:
 762     case PIXMAN_b5g6r5:
 763         return TRUE;
 764     default:
 765         return FALSE;
 766     }
 767 }
 768
 769 pixman_bool_t
 770 pixman_image_is_opaque(pixman_image_t *image)
 771 {
 772     int i = 0;
 773     int gradientNumberOfColors = 0;
 774
 775     if(image->common.alpha_map)
 776         return FALSE;
 777
 778     switch(image->type)
 779     {
 780     case BITS:
 781         if(PIXMAN_FORMAT_A(image->bits.format))
 782             return FALSE;
 783         break;
 784
 785     case LINEAR:
 786     case CONICAL:
 787     case RADIAL:
 788         gradientNumberOfColors = image->gradient.n_stops;
 789         i=0;
 790         while(i<gradientNumberOfColors)
 791         {
 792             if(image->gradient.stops[i].color.alpha != 0xffff)
 793                 return FALSE;
 794             i++;
 795         }
 796         break;
 797
 798     case SOLID:
 799          if(Alpha(image->solid.color) != 0xff)
 800             return FALSE;
 801         break;
 802     }
 803
 804     /* Convolution filters can introduce translucency if the sum of the weights
 805        is lower than 1. */
 806     if (image->common.filter == PIXMAN_FILTER_CONVOLUTION)
 807          return FALSE;
 808
 809     if (image->common.repeat == PIXMAN_REPEAT_NONE)
 810     {
 811         if (image->common.filter != PIXMAN_FILTER_NEAREST)
 812             return FALSE;
 813
 814         if (image->common.transform)
 815             return FALSE;
 816
 817         /* Gradients do not necessarily cover the entire compositing area */
 818         if (image->type == LINEAR || image->type == CONICAL || image->type == RADIAL)
 819             return FALSE;
 820     }
 821
 822      return TRUE;
 823 }