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 #include <assert.h>
  31
  32 #include "pixman-private.h"
  33 #include "pixman-combine32.h"
  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     return TRUE;
  51 }
  52
  53 /*
  54  * By default, just evaluate the image at 32bpp and expand.  Individual image
  55  * types can plug in a better scanline getter if they want to. For example
  56  * we  could produce smoother gradients by evaluating them at higher color
  57  * depth, but that's a project for the future.
  58  */
  59 void
  60 _pixman_image_get_scanline_generic_64 (pixman_image_t * image,
  61                                        int              x,
  62                                        int              y,
  63                                        int              width,
  64                                        uint32_t *       buffer,
  65                                        const uint32_t * mask)
  66 {
  67     uint32_t *mask8 = NULL;
  68
  69     /* Contract the mask image, if one exists, so that the 32-bit fetch
  70      * function can use it.
  71      */
  72     if (mask)
  73     {
  74         mask8 = pixman_malloc_ab (width, sizeof(uint32_t));
  75         if (!mask8)
  76             return;
  77
  78         pixman_contract (mask8, (uint64_t *)mask, width);
  79     }
  80
  81     /* Fetch the source image into the first half of buffer. */
  82     _pixman_image_get_scanline_32 (image, x, y, width, (uint32_t*)buffer, mask8);
  83
  84     /* Expand from 32bpp to 64bpp in place. */
  85     pixman_expand ((uint64_t *)buffer, buffer, PIXMAN_a8r8g8b8, width);
  86
  87     free (mask8);
  88 }
  89
  90 pixman_image_t *
  91 _pixman_image_allocate (void)
  92 {
  93     pixman_image_t *image = malloc (sizeof (pixman_image_t));
  94
  95     if (image)
  96     {
  97         image_common_t *common = &image->common;
  98
  99         pixman_region32_init (&common->clip_region);
 100
 101         common->alpha_count = 0;
 102         common->have_clip_region = FALSE;
 103         common->clip_sources = FALSE;
 104         common->transform = NULL;
 105         common->repeat = PIXMAN_REPEAT_NONE;
 106         common->filter = PIXMAN_FILTER_NEAREST;
 107         common->filter_params = NULL;
 108         common->n_filter_params = 0;
 109         common->alpha_map = NULL;
 110         common->component_alpha = FALSE;
 111         common->ref_count = 1;
 112         common->classify = NULL;
 113         common->client_clip = FALSE;
 114         common->destroy_func = NULL;
 115         common->destroy_data = NULL;
 116         common->dirty = TRUE;
 117     }
 118
 119     return image;
 120 }
 121
 122 source_image_class_t
 123 _pixman_image_classify (pixman_image_t *image,
 124                         int             x,
 125                         int             y,
 126                         int             width,
 127                         int             height)
 128 {
 129     if (image->common.classify)
 130         return image->common.classify (image, x, y, width, height);
 131     else
 132         return SOURCE_IMAGE_CLASS_UNKNOWN;
 133 }
 134
 135 void
 136 _pixman_image_get_scanline_32 (pixman_image_t *image,
 137                                int             x,
 138                                int             y,
 139                                int             width,
 140                                uint32_t *      buffer,
 141                                const uint32_t *mask)
 142 {
 143     image->common.get_scanline_32 (image, x, y, width, buffer, mask);
 144 }
 145
 146 /* Even thought the type of buffer is uint32_t *, the function actually expects
 147  * a uint64_t *buffer.
 148  */
 149 void
 150 _pixman_image_get_scanline_64 (pixman_image_t *image,
 151                                int             x,
 152                                int             y,
 153                                int             width,
 154                                uint32_t *      buffer,
 155                                const uint32_t *unused)
 156 {
 157     image->common.get_scanline_64 (image, x, y, width, buffer, unused);
 158 }
 159
 160 static void
 161 image_property_changed (pixman_image_t *image)
 162 {
 163     image->common.dirty = TRUE;
 164 }
 165
 166 /* Ref Counting */
 167 PIXMAN_EXPORT pixman_image_t *
 168 pixman_image_ref (pixman_image_t *image)
 169 {
 170     image->common.ref_count++;
 171
 172     return image;
 173 }
 174
 175 /* returns TRUE when the image is freed */
 176 PIXMAN_EXPORT pixman_bool_t
 177 pixman_image_unref (pixman_image_t *image)
 178 {
 179     image_common_t *common = (image_common_t *)image;
 180
 181     common->ref_count--;
 182
 183     if (common->ref_count == 0)
 184     {
 185         if (image->common.destroy_func)
 186             image->common.destroy_func (image, image->common.destroy_data);
 187
 188         pixman_region32_fini (&common->clip_region);
 189
 190         if (common->transform)
 191             free (common->transform);
 192
 193         if (common->filter_params)
 194             free (common->filter_params);
 195
 196         if (common->alpha_map)
 197             pixman_image_unref ((pixman_image_t *)common->alpha_map);
 198
 199         if (image->type == LINEAR ||
 200             image->type == RADIAL ||
 201             image->type == CONICAL)
 202         {
 203             if (image->gradient.stops)
 204                 free (image->gradient.stops);
 205         }
 206
 207         if (image->type == BITS && image->bits.free_me)
 208             free (image->bits.free_me);
 209
 210         free (image);
 211
 212         return TRUE;
 213     }
 214
 215     return FALSE;
 216 }
 217
 218 PIXMAN_EXPORT void
 219 pixman_image_set_destroy_function (pixman_image_t *            image,
 220                                    pixman_image_destroy_func_t func,
 221                                    void *                      data)
 222 {
 223     image->common.destroy_func = func;
 224     image->common.destroy_data = data;
 225 }
 226
 227 PIXMAN_EXPORT void *
 228 pixman_image_get_destroy_data (pixman_image_t *image)
 229 {
 230   return image->common.destroy_data;
 231 }
 232
 233 void
 234 _pixman_image_reset_clip_region (pixman_image_t *image)
 235 {
 236     image->common.have_clip_region = FALSE;
 237 }
 238
 239 /* Executive Summary: This function is a no-op that only exists
 240  * for historical reasons.
 241  *
 242  * There used to be a bug in the X server where it would rely on
 243  * out-of-bounds accesses when it was asked to composite with a
 244  * window as the source. It would create a pixman image pointing
 245  * to some bogus position in memory, but then set a clip region
 246  * to the position where the actual bits were.
 247  *
 248  * Due to a bug in old versions of pixman, where it would not clip
 249  * against the image bounds when a clip region was set, this would
 250  * actually work. So when the pixman bug was fixed, a workaround was
 251  * added to allow certain out-of-bound accesses. This function disabled
 252  * those workarounds.
 253  *
 254  * Since 0.21.2, pixman doesn't do these workarounds anymore, so now
 255  * this function is a no-op.
 256  */
 257 PIXMAN_EXPORT void
 258 pixman_disable_out_of_bounds_workaround (void)
 259 {
 260 }
 261
 262 static void
 263 compute_image_info (pixman_image_t *image)
 264 {
 265     pixman_format_code_t code;
 266     uint32_t flags = 0;
 267
 268     /* Transform */
 269     if (!image->common.transform)
 270     {
 271         flags |= (FAST_PATH_ID_TRANSFORM        |
 272                   FAST_PATH_X_UNIT_POSITIVE     |
 273                   FAST_PATH_Y_UNIT_ZERO         |
 274                   FAST_PATH_AFFINE_TRANSFORM);
 275     }
 276     else
 277     {
 278         flags |= FAST_PATH_HAS_TRANSFORM;
 279
 280         if (image->common.transform->matrix[2][0] == 0                  &&
 281             image->common.transform->matrix[2][1] == 0                  &&
 282             image->common.transform->matrix[2][2] == pixman_fixed_1)
 283         {
 284             flags |= FAST_PATH_AFFINE_TRANSFORM;
 285
 286             if (image->common.transform->matrix[0][1] == 0 &&
 287                 image->common.transform->matrix[1][0] == 0)
 288             {
 289                 flags |= FAST_PATH_SCALE_TRANSFORM;
 290             }
 291         }
 292
 293         if (image->common.transform->matrix[0][0] > 0)
 294             flags |= FAST_PATH_X_UNIT_POSITIVE;
 295
 296         if (image->common.transform->matrix[1][0] == 0)
 297             flags |= FAST_PATH_Y_UNIT_ZERO;
 298     }
 299
 300     /* Filter */
 301     switch (image->common.filter)
 302     {
 303     case PIXMAN_FILTER_NEAREST:
 304     case PIXMAN_FILTER_FAST:
 305         flags |= (FAST_PATH_NEAREST_FILTER | FAST_PATH_NO_CONVOLUTION_FILTER);
 306         break;
 307
 308     case PIXMAN_FILTER_BILINEAR:
 309     case PIXMAN_FILTER_GOOD:
 310     case PIXMAN_FILTER_BEST:
 311         flags |= (FAST_PATH_BILINEAR_FILTER | FAST_PATH_NO_CONVOLUTION_FILTER);
 312         break;
 313
 314     case PIXMAN_FILTER_CONVOLUTION:
 315         break;
 316
 317     default:
 318         flags |= FAST_PATH_NO_CONVOLUTION_FILTER;
 319         break;
 320     }
 321
 322     /* Repeat mode */
 323     switch (image->common.repeat)
 324     {
 325     case PIXMAN_REPEAT_NONE:
 326         flags |=
 327             FAST_PATH_NO_REFLECT_REPEAT         |
 328             FAST_PATH_NO_PAD_REPEAT             |
 329             FAST_PATH_NO_NORMAL_REPEAT;
 330         break;
 331
 332     case PIXMAN_REPEAT_REFLECT:
 333         flags |=
 334             FAST_PATH_NO_PAD_REPEAT             |
 335             FAST_PATH_NO_NONE_REPEAT            |
 336             FAST_PATH_NO_NORMAL_REPEAT;
 337         break;
 338
 339     case PIXMAN_REPEAT_PAD:
 340         flags |=
 341             FAST_PATH_NO_REFLECT_REPEAT         |
 342             FAST_PATH_NO_NONE_REPEAT            |
 343             FAST_PATH_NO_NORMAL_REPEAT;
 344         break;
 345
 346     default:
 347         flags |=
 348             FAST_PATH_NO_REFLECT_REPEAT         |
 349             FAST_PATH_NO_PAD_REPEAT             |
 350             FAST_PATH_NO_NONE_REPEAT;
 351         break;
 352     }
 353
 354     /* Component alpha */
 355     if (image->common.component_alpha)
 356         flags |= FAST_PATH_COMPONENT_ALPHA;
 357     else
 358         flags |= FAST_PATH_UNIFIED_ALPHA;
 359
 360     flags |= (FAST_PATH_NO_ACCESSORS | FAST_PATH_NARROW_FORMAT);
 361
 362     /* Type specific checks */
 363     switch (image->type)
 364     {
 365     case SOLID:
 366         code = PIXMAN_solid;
 367
 368         if (image->solid.color.alpha == 0xffff)
 369             flags |= FAST_PATH_IS_OPAQUE;
 370         break;
 371
 372     case BITS:
 373         if (image->bits.width == 1      &&
 374             image->bits.height == 1     &&
 375             image->common.repeat != PIXMAN_REPEAT_NONE)
 376         {
 377             code = PIXMAN_solid;
 378         }
 379         else
 380         {
 381             code = image->bits.format;
 382         }
 383
 384         if (!PIXMAN_FORMAT_A (image->bits.format)                               &&
 385             PIXMAN_FORMAT_TYPE (image->bits.format) != PIXMAN_TYPE_GRAY         &&
 386             PIXMAN_FORMAT_TYPE (image->bits.format) != PIXMAN_TYPE_COLOR)
 387         {
 388             flags |= FAST_PATH_SAMPLES_OPAQUE;
 389
 390             if (image->common.repeat != PIXMAN_REPEAT_NONE)
 391                 flags |= FAST_PATH_IS_OPAQUE;
 392         }
 393
 394         if (image->bits.read_func || image->bits.write_func)
 395             flags &= ~FAST_PATH_NO_ACCESSORS;
 396
 397         if (PIXMAN_FORMAT_IS_WIDE (image->bits.format))
 398             flags &= ~FAST_PATH_NARROW_FORMAT;
 399         break;
 400
 401     case RADIAL:
 402         code = PIXMAN_unknown;
 403
 404         /*
 405          * As explained in pixman-radial-gradient.c, every point of
 406          * the plane has a valid associated radius (and thus will be
 407          * colored) if and only if a is negative (i.e. one of the two
 408          * circles contains the other one).
 409          */
 410
 411         if (image->radial.a >= 0)
 412             break;
 413
 414         /* Fall through */
 415
 416     case LINEAR:
 417         code = PIXMAN_unknown;
 418
 419         if (image->common.repeat != PIXMAN_REPEAT_NONE)
 420         {
 421             int i;
 422
 423             flags |= FAST_PATH_IS_OPAQUE;
 424             for (i = 0; i < image->gradient.n_stops; ++i)
 425             {
 426                 if (image->gradient.stops[i].color.alpha != 0xffff)
 427                 {
 428                     flags &= ~FAST_PATH_IS_OPAQUE;
 429                     break;
 430                 }
 431             }
 432         }
 433         break;
 434
 435     default:
 436         code = PIXMAN_unknown;
 437         break;
 438     }
 439
 440     /* Alpha map */
 441     if (!image->common.alpha_map)
 442     {
 443         flags |= FAST_PATH_NO_ALPHA_MAP;
 444     }
 445     else
 446     {
 447         if (PIXMAN_FORMAT_IS_WIDE (image->common.alpha_map->format))
 448             flags &= ~FAST_PATH_NARROW_FORMAT;
 449     }
 450
 451     /* Both alpha maps and convolution filters can introduce
 452      * non-opaqueness in otherwise opaque images. Also
 453      * an image with component alpha turned on is only opaque
 454      * if all channels are opaque, so we simply turn it off
 455      * unconditionally for those images.
 456      */
 457     if (image->common.alpha_map                                 ||
 458         image->common.filter == PIXMAN_FILTER_CONVOLUTION       ||
 459         image->common.component_alpha)
 460     {
 461         flags &= ~(FAST_PATH_IS_OPAQUE | FAST_PATH_SAMPLES_OPAQUE);
 462     }
 463
 464     image->common.flags = flags;
 465     image->common.extended_format_code = code;
 466 }
 467
 468 void
 469 _pixman_image_validate (pixman_image_t *image)
 470 {
 471     if (image->common.dirty)
 472     {
 473         compute_image_info (image);
 474
 475         /* It is important that property_changed is
 476          * called *after* compute_image_info() because
 477          * property_changed() can make use of the flags
 478          * to set up accessors etc.
 479          */
 480         image->common.property_changed (image);
 481
 482         image->common.dirty = FALSE;
 483     }
 484
 485     if (image->common.alpha_map)
 486         _pixman_image_validate ((pixman_image_t *)image->common.alpha_map);
 487 }
 488
 489 PIXMAN_EXPORT pixman_bool_t
 490 pixman_image_set_clip_region32 (pixman_image_t *   image,
 491                                 pixman_region32_t *region)
 492 {
 493     image_common_t *common = (image_common_t *)image;
 494     pixman_bool_t result;
 495
 496     if (region)
 497     {
 498         if ((result = pixman_region32_copy (&common->clip_region, region)))
 499             image->common.have_clip_region = TRUE;
 500     }
 501     else
 502     {
 503         _pixman_image_reset_clip_region (image);
 504
 505         result = TRUE;
 506     }
 507
 508     image_property_changed (image);
 509
 510     return result;
 511 }
 512
 513 PIXMAN_EXPORT pixman_bool_t
 514 pixman_image_set_clip_region (pixman_image_t *   image,
 515                               pixman_region16_t *region)
 516 {
 517     image_common_t *common = (image_common_t *)image;
 518     pixman_bool_t result;
 519
 520     if (region)
 521     {
 522         if ((result = pixman_region32_copy_from_region16 (&common->clip_region, region)))
 523             image->common.have_clip_region = TRUE;
 524     }
 525     else
 526     {
 527         _pixman_image_reset_clip_region (image);
 528
 529         result = TRUE;
 530     }
 531
 532     image_property_changed (image);
 533
 534     return result;
 535 }
 536
 537 PIXMAN_EXPORT void
 538 pixman_image_set_has_client_clip (pixman_image_t *image,
 539                                   pixman_bool_t   client_clip)
 540 {
 541     image->common.client_clip = client_clip;
 542 }
 543
 544 PIXMAN_EXPORT pixman_bool_t
 545 pixman_image_set_transform (pixman_image_t *          image,
 546                             const pixman_transform_t *transform)
 547 {
 548     static const pixman_transform_t id =
 549     {
 550         { { pixman_fixed_1, 0, 0 },
 551           { 0, pixman_fixed_1, 0 },
 552           { 0, 0, pixman_fixed_1 } }
 553     };
 554
 555     image_common_t *common = (image_common_t *)image;
 556     pixman_bool_t result;
 557
 558     if (common->transform == transform)
 559         return TRUE;
 560
 561     if (memcmp (&id, transform, sizeof (pixman_transform_t)) == 0)
 562     {
 563         free (common->transform);
 564         common->transform = NULL;
 565         result = TRUE;
 566
 567         goto out;
 568     }
 569
 570     if (common->transform == NULL)
 571         common->transform = malloc (sizeof (pixman_transform_t));
 572
 573     if (common->transform == NULL)
 574     {
 575         result = FALSE;
 576
 577         goto out;
 578     }
 579
 580     memcpy (common->transform, transform, sizeof(pixman_transform_t));
 581
 582     result = TRUE;
 583
 584 out:
 585     image_property_changed (image);
 586
 587     return result;
 588 }
 589
 590 PIXMAN_EXPORT void
 591 pixman_image_set_repeat (pixman_image_t *image,
 592                          pixman_repeat_t repeat)
 593 {
 594     image->common.repeat = repeat;
 595
 596     image_property_changed (image);
 597 }
 598
 599 PIXMAN_EXPORT pixman_bool_t
 600 pixman_image_set_filter (pixman_image_t *      image,
 601                          pixman_filter_t       filter,
 602                          const pixman_fixed_t *params,
 603                          int                   n_params)
 604 {
 605     image_common_t *common = (image_common_t *)image;
 606     pixman_fixed_t *new_params;
 607
 608     if (params == common->filter_params && filter == common->filter)
 609         return TRUE;
 610
 611     new_params = NULL;
 612     if (params)
 613     {
 614         new_params = pixman_malloc_ab (n_params, sizeof (pixman_fixed_t));
 615         if (!new_params)
 616             return FALSE;
 617
 618         memcpy (new_params,
 619                 params, n_params * sizeof (pixman_fixed_t));
 620     }
 621
 622     common->filter = filter;
 623
 624     if (common->filter_params)
 625         free (common->filter_params);
 626
 627     common->filter_params = new_params;
 628     common->n_filter_params = n_params;
 629
 630     image_property_changed (image);
 631     return TRUE;
 632 }
 633
 634 PIXMAN_EXPORT void
 635 pixman_image_set_source_clipping (pixman_image_t *image,
 636                                   pixman_bool_t   clip_sources)
 637 {
 638     image->common.clip_sources = clip_sources;
 639
 640     image_property_changed (image);
 641 }
 642
 643 /* Unlike all the other property setters, this function does not
 644  * copy the content of indexed. Doing this copying is simply
 645  * way, way too expensive.
 646  */
 647 PIXMAN_EXPORT void
 648 pixman_image_set_indexed (pixman_image_t *        image,
 649                           const pixman_indexed_t *indexed)
 650 {
 651     bits_image_t *bits = (bits_image_t *)image;
 652
 653     bits->indexed = indexed;
 654
 655     image_property_changed (image);
 656 }
 657
 658 PIXMAN_EXPORT void
 659 pixman_image_set_alpha_map (pixman_image_t *image,
 660                             pixman_image_t *alpha_map,
 661                             int16_t         x,
 662                             int16_t         y)
 663 {
 664     image_common_t *common = (image_common_t *)image;
 665
 666     return_if_fail (!alpha_map || alpha_map->type == BITS);
 667
 668     if (alpha_map && common->alpha_count > 0)
 669     {
 670         /* If this image is being used as an alpha map itself,
 671          * then you can't give it an alpha map of its own.
 672          */
 673         return;
 674     }
 675
 676     if (alpha_map && alpha_map->common.alpha_map)
 677     {
 678         /* If the image has an alpha map of its own,
 679          * then it can't be used as an alpha map itself
 680          */
 681         return;
 682     }
 683
 684     if (common->alpha_map != (bits_image_t *)alpha_map)
 685     {
 686         if (common->alpha_map)
 687         {
 688             common->alpha_map->common.alpha_count--;
 689
 690             pixman_image_unref ((pixman_image_t *)common->alpha_map);
 691         }
 692
 693         if (alpha_map)
 694         {
 695             common->alpha_map = (bits_image_t *)pixman_image_ref (alpha_map);
 696
 697             common->alpha_map->common.alpha_count++;
 698         }
 699         else
 700         {
 701             common->alpha_map = NULL;
 702         }
 703     }
 704
 705     common->alpha_origin_x = x;
 706     common->alpha_origin_y = y;
 707
 708     image_property_changed (image);
 709 }
 710
 711 PIXMAN_EXPORT void
 712 pixman_image_set_component_alpha   (pixman_image_t *image,
 713                                     pixman_bool_t   component_alpha)
 714 {
 715     image->common.component_alpha = component_alpha;
 716
 717     image_property_changed (image);
 718 }
 719
 720 PIXMAN_EXPORT pixman_bool_t
 721 pixman_image_get_component_alpha   (pixman_image_t       *image)
 722 {
 723     return image->common.component_alpha;
 724 }
 725
 726 PIXMAN_EXPORT void
 727 pixman_image_set_accessors (pixman_image_t *           image,
 728                             pixman_read_memory_func_t  read_func,
 729                             pixman_write_memory_func_t write_func)
 730 {
 731     return_if_fail (image != NULL);
 732
 733     if (image->type == BITS)
 734     {
 735         image->bits.read_func = read_func;
 736         image->bits.write_func = write_func;
 737
 738         image_property_changed (image);
 739     }
 740 }
 741
 742 PIXMAN_EXPORT uint32_t *
 743 pixman_image_get_data (pixman_image_t *image)
 744 {
 745     if (image->type == BITS)
 746         return image->bits.bits;
 747
 748     return NULL;
 749 }
 750
 751 PIXMAN_EXPORT int
 752 pixman_image_get_width (pixman_image_t *image)
 753 {
 754     if (image->type == BITS)
 755         return image->bits.width;
 756
 757     return 0;
 758 }
 759
 760 PIXMAN_EXPORT int
 761 pixman_image_get_height (pixman_image_t *image)
 762 {
 763     if (image->type == BITS)
 764         return image->bits.height;
 765
 766     return 0;
 767 }
 768
 769 PIXMAN_EXPORT int
 770 pixman_image_get_stride (pixman_image_t *image)
 771 {
 772     if (image->type == BITS)
 773         return image->bits.rowstride * (int) sizeof (uint32_t);
 774
 775     return 0;
 776 }
 777
 778 PIXMAN_EXPORT int
 779 pixman_image_get_depth (pixman_image_t *image)
 780 {
 781     if (image->type == BITS)
 782         return PIXMAN_FORMAT_DEPTH (image->bits.format);
 783
 784     return 0;
 785 }
 786
 787 PIXMAN_EXPORT pixman_format_code_t
 788 pixman_image_get_format (pixman_image_t *image)
 789 {
 790     if (image->type == BITS)
 791         return image->bits.format;
 792
 793     return 0;
 794 }
 795
 796 uint32_t
 797 _pixman_image_get_solid (pixman_image_t *     image,
 798                          pixman_format_code_t format)
 799 {
 800     uint32_t result;
 801
 802     _pixman_image_get_scanline_32 (image, 0, 0, 1, &result, NULL);
 803
 804     /* If necessary, convert RGB <--> BGR. */
 805     if (PIXMAN_FORMAT_TYPE (format) != PIXMAN_TYPE_ARGB)
 806     {
 807         result = (((result & 0xff000000) >>  0) |
 808                   ((result & 0x00ff0000) >> 16) |
 809                   ((result & 0x0000ff00) >>  0) |
 810                   ((result & 0x000000ff) << 16));
 811     }
 812
 813     return result;
 814 }