src/mesa/drivers/dri/intel/intel_tex_image.c

   1
   2 #include <stdlib.h>
   3 #include <stdio.h>
   4
   5 #include "main/glheader.h"
   6 #include "main/macros.h"
   7 #include "main/mtypes.h"
   8 #include "main/enums.h"
   9 #include "main/colortab.h"
  10 #include "main/convolve.h"
  11 #include "main/context.h"
  12 #include "main/simple_list.h"
  13 #include "main/texcompress.h"
  14 #include "main/texformat.h"
  15 #include "main/texobj.h"
  16 #include "main/texstore.h"
  17 #include "main/teximage.h"
  18
  19 #include "intel_context.h"
  20 #include "intel_mipmap_tree.h"
  21 #include "intel_buffer_objects.h"
  22 #include "intel_batchbuffer.h"
  23 #include "intel_tex.h"
  24 #include "intel_blit.h"
  25 #include "intel_fbo.h"
  26
  27 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
  28
  29 /* Functions to store texture images.  Where possible, mipmap_tree's
  30  * will be created or further instantiated with image data, otherwise
  31  * images will be stored in malloc'd memory.  A validation step is
  32  * required to pull those images into a mipmap tree, or otherwise
  33  * decide a fallback is required.
  34  */
  35
  36
  37 static int
  38 logbase2(int n)
  39 {
  40    GLint i = 1;
  41    GLint log2 = 0;
  42
  43    while (n > i) {
  44       i *= 2;
  45       log2++;
  46    }
  47
  48    return log2;
  49 }
  50
  51
  52 /* Otherwise, store it in memory if (Border != 0) or (any dimension ==
  53  * 1).
  54  *
  55  * Otherwise, if max_level >= level >= min_level, create tree with
  56  * space for textures from min_level down to max_level.
  57  *
  58  * Otherwise, create tree with space for textures from (level
  59  * 0)..(1x1).  Consider pruning this tree at a validation if the
  60  * saving is worth it.
  61  */
  62 static void
  63 guess_and_alloc_mipmap_tree(struct intel_context *intel,
  64                             struct intel_texture_object *intelObj,
  65                             struct intel_texture_image *intelImage)
  66 {
  67    GLuint firstLevel;
  68    GLuint lastLevel;
  69    GLuint width = intelImage->base.Width;
  70    GLuint height = intelImage->base.Height;
  71    GLuint depth = intelImage->base.Depth;
  72    GLuint l2width, l2height, l2depth;
  73    GLuint i, comp_byte = 0;
  74
  75    DBG("%s\n", __FUNCTION__);
  76
  77    if (intelImage->base.Border ||
  78        ((intelImage->base._BaseFormat == GL_DEPTH_COMPONENT) &&
  79         ((intelObj->base.WrapS == GL_CLAMP_TO_BORDER) ||
  80          (intelObj->base.WrapT == GL_CLAMP_TO_BORDER))))
  81       return;
  82
  83    if (intelImage->level > intelObj->base.BaseLevel &&
  84        (intelImage->base.Width == 1 ||
  85         (intelObj->base.Target != GL_TEXTURE_1D &&
  86          intelImage->base.Height == 1) ||
  87         (intelObj->base.Target == GL_TEXTURE_3D &&
  88          intelImage->base.Depth == 1)))
  89       return;
  90
  91    /* If this image disrespects BaseLevel, allocate from level zero.
  92     * Usually BaseLevel == 0, so it's unlikely to happen.
  93     */
  94    if (intelImage->level < intelObj->base.BaseLevel)
  95       firstLevel = 0;
  96    else
  97       firstLevel = intelObj->base.BaseLevel;
  98
  99
 100    /* Figure out image dimensions at start level.
 101     */
 102    for (i = intelImage->level; i > firstLevel; i--) {
 103       width <<= 1;
 104       if (height != 1)
 105          height <<= 1;
 106       if (depth != 1)
 107          depth <<= 1;
 108    }
 109
 110    /* Guess a reasonable value for lastLevel.  This is probably going
 111     * to be wrong fairly often and might mean that we have to look at
 112     * resizable buffers, or require that buffers implement lazy
 113     * pagetable arrangements.
 114     */
 115    if ((intelObj->base.MinFilter == GL_NEAREST ||
 116         intelObj->base.MinFilter == GL_LINEAR) &&
 117        intelImage->level == firstLevel) {
 118       lastLevel = firstLevel;
 119    }
 120    else {
 121       l2width = logbase2(width);
 122       l2height = logbase2(height);
 123       l2depth = logbase2(depth);
 124       lastLevel = firstLevel + MAX2(MAX2(l2width, l2height), l2depth);
 125    }
 126
 127    assert(!intelObj->mt);
 128    if (intelImage->base.IsCompressed)
 129       comp_byte = intel_compressed_num_bytes(intelImage->base.TexFormat->MesaFormat);
 130    intelObj->mt = intel_miptree_create(intel,
 131                                        intelObj->base.Target,
 132                                        intelImage->base.InternalFormat,
 133                                        firstLevel,
 134                                        lastLevel,
 135                                        width,
 136                                        height,
 137                                        depth,
 138                                        intelImage->base.TexFormat->TexelBytes,
 139                                        comp_byte);
 140
 141    DBG("%s - success\n", __FUNCTION__);
 142 }
 143
 144
 145
 146
 147 static GLuint
 148 target_to_face(GLenum target)
 149 {
 150    switch (target) {
 151    case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
 152    case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
 153    case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
 154    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
 155    case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
 156    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
 157       return ((GLuint) target - (GLuint) GL_TEXTURE_CUBE_MAP_POSITIVE_X);
 158    default:
 159       return 0;
 160    }
 161 }
 162
 163 /* There are actually quite a few combinations this will work for,
 164  * more than what I've listed here.
 165  */
 166 static GLboolean
 167 check_pbo_format(GLint internalFormat,
 168                  GLenum format, GLenum type,
 169                  const struct gl_texture_format *mesa_format)
 170 {
 171    switch (internalFormat) {
 172    case 4:
 173    case GL_RGBA:
 174       return (format == GL_BGRA &&
 175               (type == GL_UNSIGNED_BYTE ||
 176                type == GL_UNSIGNED_INT_8_8_8_8_REV) &&
 177               mesa_format == &_mesa_texformat_argb8888);
 178    case 3:
 179    case GL_RGB:
 180       return (format == GL_RGB &&
 181               type == GL_UNSIGNED_SHORT_5_6_5 &&
 182               mesa_format == &_mesa_texformat_rgb565);
 183    case GL_YCBCR_MESA:
 184       return (type == GL_UNSIGNED_SHORT_8_8_MESA || type == GL_UNSIGNED_BYTE);
 185    default:
 186       return GL_FALSE;
 187    }
 188 }
 189
 190
 191 /* XXX: Do this for TexSubImage also:
 192  */
 193 static GLboolean
 194 try_pbo_upload(struct intel_context *intel,
 195                struct intel_texture_image *intelImage,
 196                const struct gl_pixelstore_attrib *unpack,
 197                GLint internalFormat,
 198                GLint width, GLint height,
 199                GLenum format, GLenum type, const void *pixels)
 200 {
 201    struct intel_buffer_object *pbo = intel_buffer_object(unpack->BufferObj);
 202    GLuint src_offset, src_stride;
 203    GLuint dst_offset, dst_stride;
 204
 205    if (!pbo ||
 206        intel->ctx._ImageTransferState ||
 207        unpack->SkipPixels || unpack->SkipRows) {
 208       _mesa_printf("%s: failure 1\n", __FUNCTION__);
 209       return GL_FALSE;
 210    }
 211
 212    src_offset = (GLuint) pixels;
 213
 214    if (unpack->RowLength > 0)
 215       src_stride = unpack->RowLength;
 216    else
 217       src_stride = width;
 218
 219    dst_offset = intel_miptree_image_offset(intelImage->mt,
 220                                            intelImage->face,
 221                                            intelImage->level);
 222
 223    dst_stride = intelImage->mt->pitch;
 224
 225    intelFlush(&intel->ctx);
 226    LOCK_HARDWARE(intel);
 227    {
 228       dri_bo *src_buffer = intel_bufferobj_buffer(intel, pbo, INTEL_READ);
 229       dri_bo *dst_buffer = intel_region_buffer(intel,
 230                                                intelImage->mt->region,
 231                                                INTEL_WRITE_FULL);
 232
 233
 234       intelEmitCopyBlit(intel,
 235                         intelImage->mt->cpp,
 236                         src_stride, src_buffer, src_offset, GL_FALSE,
 237                         dst_stride, dst_buffer, dst_offset, GL_FALSE,
 238                         0, 0, 0, 0, width, height,
 239                         GL_COPY);
 240    }
 241    UNLOCK_HARDWARE(intel);
 242
 243    return GL_TRUE;
 244 }
 245
 246
 247
 248 static GLboolean
 249 try_pbo_zcopy(struct intel_context *intel,
 250               struct intel_texture_image *intelImage,
 251               const struct gl_pixelstore_attrib *unpack,
 252               GLint internalFormat,
 253               GLint width, GLint height,
 254               GLenum format, GLenum type, const void *pixels)
 255 {
 256    struct intel_buffer_object *pbo = intel_buffer_object(unpack->BufferObj);
 257    GLuint src_offset, src_stride;
 258    GLuint dst_offset, dst_stride;
 259
 260    if (!pbo ||
 261        intel->ctx._ImageTransferState ||
 262        unpack->SkipPixels || unpack->SkipRows) {
 263       _mesa_printf("%s: failure 1\n", __FUNCTION__);
 264       return GL_FALSE;
 265    }
 266
 267    src_offset = (GLuint) pixels;
 268
 269    if (unpack->RowLength > 0)
 270       src_stride = unpack->RowLength;
 271    else
 272       src_stride = width;
 273
 274    dst_offset = intel_miptree_image_offset(intelImage->mt,
 275                                            intelImage->face,
 276                                            intelImage->level);
 277
 278    dst_stride = intelImage->mt->pitch;
 279
 280    if (src_stride != dst_stride || dst_offset != 0 || src_offset != 0) {
 281       _mesa_printf("%s: failure 2\n", __FUNCTION__);
 282       return GL_FALSE;
 283    }
 284
 285    intel_region_attach_pbo(intel, intelImage->mt->region, pbo);
 286
 287    return GL_TRUE;
 288 }
 289
 290
 291
 292
 293
 294
 295 static void
 296 intelTexImage(GLcontext * ctx,
 297               GLint dims,
 298               GLenum target, GLint level,
 299               GLint internalFormat,
 300               GLint width, GLint height, GLint depth,
 301               GLint border,
 302               GLenum format, GLenum type, const void *pixels,
 303               const struct gl_pixelstore_attrib *unpack,
 304               struct gl_texture_object *texObj,
 305               struct gl_texture_image *texImage, GLsizei imageSize, int compressed)
 306 {
 307    struct intel_context *intel = intel_context(ctx);
 308    struct intel_texture_object *intelObj = intel_texture_object(texObj);
 309    struct intel_texture_image *intelImage = intel_texture_image(texImage);
 310    GLint postConvWidth = width;
 311    GLint postConvHeight = height;
 312    GLint texelBytes, sizeInBytes;
 313    GLuint dstRowStride, srcRowStride = texImage->RowStride;
 314
 315
 316    DBG("%s target %s level %d %dx%dx%d border %d\n", __FUNCTION__,
 317        _mesa_lookup_enum_by_nr(target), level, width, height, depth, border);
 318
 319    intelFlush(ctx);
 320
 321    intelImage->face = target_to_face(target);
 322    intelImage->level = level;
 323
 324    if (ctx->_ImageTransferState & IMAGE_CONVOLUTION_BIT) {
 325       _mesa_adjust_image_for_convolution(ctx, dims, &postConvWidth,
 326                                          &postConvHeight);
 327    }
 328
 329    /* choose the texture format */
 330    texImage->TexFormat = intelChooseTextureFormat(ctx, internalFormat,
 331                                                   format, type);
 332
 333    _mesa_set_fetch_functions(texImage, dims);
 334
 335    if (texImage->TexFormat->TexelBytes == 0) {
 336       /* must be a compressed format */
 337       texelBytes = 0;
 338       texImage->IsCompressed = GL_TRUE;
 339       texImage->CompressedSize =
 340          ctx->Driver.CompressedTextureSize(ctx, texImage->Width,
 341                                            texImage->Height, texImage->Depth,
 342                                            texImage->TexFormat->MesaFormat);
 343    } else {
 344       texelBytes = texImage->TexFormat->TexelBytes;
 345
 346       /* Minimum pitch of 32 bytes */
 347       if (postConvWidth * texelBytes < 32) {
 348          postConvWidth = 32 / texelBytes;
 349          texImage->RowStride = postConvWidth;
 350       }
 351
 352       if (!intelImage->mt) {
 353           assert(texImage->RowStride == postConvWidth);
 354       }
 355    }
 356
 357    /* Release the reference to a potentially orphaned buffer.
 358     * Release any old malloced memory.
 359     */
 360    if (intelImage->mt) {
 361       intel_miptree_release(intel, &intelImage->mt);
 362       assert(!texImage->Data);
 363    }
 364    else if (texImage->Data) {
 365       _mesa_free_texmemory(texImage->Data);
 366       texImage->Data = NULL;
 367    }
 368
 369    /* If this is the only texture image in the tree, could call
 370     * bmBufferData with NULL data to free the old block and avoid
 371     * waiting on any outstanding fences.
 372     */
 373    if (intelObj->mt &&
 374        intelObj->mt->first_level == level &&
 375        intelObj->mt->last_level == level &&
 376        intelObj->mt->target != GL_TEXTURE_CUBE_MAP_ARB &&
 377        !intel_miptree_match_image(intelObj->mt, &intelImage->base,
 378                                   intelImage->face, intelImage->level)) {
 379
 380       DBG("release it\n");
 381       intel_miptree_release(intel, &intelObj->mt);
 382       assert(!intelObj->mt);
 383    }
 384
 385    if (!intelObj->mt) {
 386       guess_and_alloc_mipmap_tree(intel, intelObj, intelImage);
 387       if (!intelObj->mt) {
 388          DBG("guess_and_alloc_mipmap_tree: failed\n");
 389       }
 390    }
 391
 392    assert(!intelImage->mt);
 393
 394    if (intelObj->mt &&
 395        intel_miptree_match_image(intelObj->mt, &intelImage->base,
 396                                  intelImage->face, intelImage->level)) {
 397
 398       intel_miptree_reference(&intelImage->mt, intelObj->mt);
 399       assert(intelImage->mt);
 400    } else if (intelImage->base.Border == 0) {
 401       int comp_byte = 0;
 402
 403       if (intelImage->base.IsCompressed) {
 404          comp_byte =
 405             intel_compressed_num_bytes(intelImage->base.TexFormat->MesaFormat);
 406       }
 407
 408       /* Didn't fit in the object miptree, but it's suitable for inclusion in
 409        * a miptree, so create one just for our level and store it in the image.
 410        * It'll get moved into the object miptree at validate time.
 411        */
 412       intelImage->mt = intel_miptree_create(intel, target, internalFormat,
 413                                             level, level,
 414                                             width, height, depth,
 415                                             intelImage->base.TexFormat->TexelBytes,
 416                                             comp_byte);
 417
 418    }
 419
 420    /* PBO fastpaths:
 421     */
 422    if (dims <= 2 &&
 423        intelImage->mt &&
 424        intel_buffer_object(unpack->BufferObj) &&
 425        check_pbo_format(internalFormat, format,
 426                         type, intelImage->base.TexFormat)) {
 427
 428       DBG("trying pbo upload\n");
 429
 430       /* Attempt to texture directly from PBO data (zero copy upload).
 431        *
 432        * Currently disable as it can lead to worse as well as better
 433        * performance (in particular when intel_region_cow() is
 434        * required).
 435        */
 436       if (intelObj->mt == intelImage->mt &&
 437           intelObj->mt->first_level == level &&
 438           intelObj->mt->last_level == level) {
 439
 440          if (try_pbo_zcopy(intel, intelImage, unpack,
 441                            internalFormat,
 442                            width, height, format, type, pixels)) {
 443
 444             DBG("pbo zcopy upload succeeded\n");
 445             return;
 446          }
 447       }
 448
 449
 450       /* Otherwise, attempt to use the blitter for PBO image uploads.
 451        */
 452       if (try_pbo_upload(intel, intelImage, unpack,
 453                          internalFormat,
 454                          width, height, format, type, pixels)) {
 455          DBG("pbo upload succeeded\n");
 456          return;
 457       }
 458
 459       DBG("pbo upload failed\n");
 460    }
 461
 462
 463
 464    /* intelCopyTexImage calls this function with pixels == NULL, with
 465     * the expectation that the mipmap tree will be set up but nothing
 466     * more will be done.  This is where those calls return:
 467     */
 468    if (compressed) {
 469       pixels = _mesa_validate_pbo_compressed_teximage(ctx, imageSize, pixels,
 470                                                       unpack,
 471                                                       "glCompressedTexImage");
 472    } else {
 473       pixels = _mesa_validate_pbo_teximage(ctx, dims, width, height, 1,
 474                                            format, type,
 475                                            pixels, unpack, "glTexImage");
 476    }
 477
 478    LOCK_HARDWARE(intel);
 479
 480    if (intelImage->mt) {
 481       texImage->Data = intel_miptree_image_map(intel,
 482                                                intelImage->mt,
 483                                                intelImage->face,
 484                                                intelImage->level,
 485                                                &dstRowStride,
 486                                                intelImage->base.ImageOffsets);
 487       texImage->RowStride = dstRowStride / intelImage->mt->cpp;
 488    }
 489    else {
 490       /* Allocate regular memory and store the image there temporarily.   */
 491       if (texImage->IsCompressed) {
 492          sizeInBytes = texImage->CompressedSize;
 493          dstRowStride =
 494             _mesa_compressed_row_stride(texImage->TexFormat->MesaFormat, width);
 495          assert(dims != 3);
 496       }
 497       else {
 498          dstRowStride = postConvWidth * texelBytes;
 499          sizeInBytes = depth * dstRowStride * postConvHeight;
 500       }
 501
 502       texImage->Data = _mesa_alloc_texmemory(sizeInBytes);
 503    }
 504
 505    DBG("Upload image %dx%dx%d row_len %d "
 506        "pitch %d\n",
 507        width, height, depth, width * texelBytes, dstRowStride);
 508
 509    /* Copy data.  Would like to know when it's ok for us to eg. use
 510     * the blitter to copy.  Or, use the hardware to do the format
 511     * conversion and copy:
 512     */
 513    if (pixels) {
 514        if (compressed) {
 515            if (intelImage->mt) {
 516                struct intel_region *dst = intelImage->mt->region;
 517                _mesa_copy_rect(texImage->Data, dst->cpp, dst->pitch,
 518                                0, 0,
 519                                intelImage->mt->level[level].width,
 520                                intelImage->mt->level[level].height/4,
 521                                pixels,
 522                                srcRowStride,
 523                                0, 0);
 524            } else
 525                memcpy(texImage->Data, pixels, imageSize);
 526        } else if (!texImage->TexFormat->StoreImage(ctx, dims,
 527                                                    texImage->_BaseFormat,
 528                                                    texImage->TexFormat,
 529                                                    texImage->Data, 0, 0, 0, /* dstX/Y/Zoffset */
 530                                                    dstRowStride,
 531                                                    texImage->ImageOffsets,
 532                                                    width, height, depth,
 533                                                    format, type, pixels, unpack)) {
 534            _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage");
 535        }
 536    }
 537
 538    /* GL_SGIS_generate_mipmap */
 539    if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
 540       intel_generate_mipmap(ctx, target, texObj);
 541    }
 542
 543    _mesa_unmap_teximage_pbo(ctx, unpack);
 544
 545    if (intelImage->mt) {
 546       intel_miptree_image_unmap(intel, intelImage->mt);
 547       texImage->Data = NULL;
 548    }
 549
 550    UNLOCK_HARDWARE(intel);
 551 }
 552
 553 void
 554 intelTexImage3D(GLcontext * ctx,
 555                 GLenum target, GLint level,
 556                 GLint internalFormat,
 557                 GLint width, GLint height, GLint depth,
 558                 GLint border,
 559                 GLenum format, GLenum type, const void *pixels,
 560                 const struct gl_pixelstore_attrib *unpack,
 561                 struct gl_texture_object *texObj,
 562                 struct gl_texture_image *texImage)
 563 {
 564    intelTexImage(ctx, 3, target, level,
 565                  internalFormat, width, height, depth, border,
 566                  format, type, pixels, unpack, texObj, texImage, 0, 0);
 567 }
 568
 569
 570 void
 571 intelTexImage2D(GLcontext * ctx,
 572                 GLenum target, GLint level,
 573                 GLint internalFormat,
 574                 GLint width, GLint height, GLint border,
 575                 GLenum format, GLenum type, const void *pixels,
 576                 const struct gl_pixelstore_attrib *unpack,
 577                 struct gl_texture_object *texObj,
 578                 struct gl_texture_image *texImage)
 579 {
 580    intelTexImage(ctx, 2, target, level,
 581                  internalFormat, width, height, 1, border,
 582                  format, type, pixels, unpack, texObj, texImage, 0, 0);
 583 }
 584
 585 void
 586 intelTexImage1D(GLcontext * ctx,
 587                 GLenum target, GLint level,
 588                 GLint internalFormat,
 589                 GLint width, GLint border,
 590                 GLenum format, GLenum type, const void *pixels,
 591                 const struct gl_pixelstore_attrib *unpack,
 592                 struct gl_texture_object *texObj,
 593                 struct gl_texture_image *texImage)
 594 {
 595    intelTexImage(ctx, 1, target, level,
 596                  internalFormat, width, 1, 1, border,
 597                  format, type, pixels, unpack, texObj, texImage, 0, 0);
 598 }
 599
 600 void intelCompressedTexImage2D( GLcontext *ctx, GLenum target, GLint level,
 601                                 GLint internalFormat,
 602                                 GLint width, GLint height, GLint border,
 603                                 GLsizei imageSize, const GLvoid *data,
 604                                 struct gl_texture_object *texObj,
 605                                 struct gl_texture_image *texImage )
 606 {
 607    intelTexImage(ctx, 2, target, level,
 608                  internalFormat, width, height, 1, border,
 609                  0, 0, data, &ctx->Unpack, texObj, texImage, imageSize, 1);
 610 }
 611
 612 /**
 613  * Need to map texture image into memory before copying image data,
 614  * then unmap it.
 615  */
 616 static void
 617 intel_get_tex_image(GLcontext * ctx, GLenum target, GLint level,
 618                     GLenum format, GLenum type, GLvoid * pixels,
 619                     struct gl_texture_object *texObj,
 620                     struct gl_texture_image *texImage, int compressed)
 621 {
 622    struct intel_context *intel = intel_context(ctx);
 623    struct intel_texture_image *intelImage = intel_texture_image(texImage);
 624
 625    /* Map */
 626    if (intelImage->mt) {
 627       /* Image is stored in hardware format in a buffer managed by the
 628        * kernel.  Need to explicitly map and unmap it.
 629        */
 630       intelImage->base.Data =
 631          intel_miptree_image_map(intel,
 632                                  intelImage->mt,
 633                                  intelImage->face,
 634                                  intelImage->level,
 635                                  &intelImage->base.RowStride,
 636                                  intelImage->base.ImageOffsets);
 637       intelImage->base.RowStride /= intelImage->mt->cpp;
 638    }
 639    else {
 640       /* Otherwise, the image should actually be stored in
 641        * intelImage->base.Data.  This is pretty confusing for
 642        * everybody, I'd much prefer to separate the two functions of
 643        * texImage->Data - storage for texture images in main memory
 644        * and access (ie mappings) of images.  In other words, we'd
 645        * create a new texImage->Map field and leave Data simply for
 646        * storage.
 647        */
 648       assert(intelImage->base.Data);
 649    }
 650
 651
 652    if (compressed) {
 653       _mesa_get_compressed_teximage(ctx, target, level, pixels,
 654                                     texObj, texImage);
 655    } else {
 656       _mesa_get_teximage(ctx, target, level, format, type, pixels,
 657                          texObj, texImage);
 658    }
 659
 660
 661    /* Unmap */
 662    if (intelImage->mt) {
 663       intel_miptree_image_unmap(intel, intelImage->mt);
 664       intelImage->base.Data = NULL;
 665    }
 666 }
 667
 668 void
 669 intelGetTexImage(GLcontext * ctx, GLenum target, GLint level,
 670                  GLenum format, GLenum type, GLvoid * pixels,
 671                  struct gl_texture_object *texObj,
 672                  struct gl_texture_image *texImage)
 673 {
 674    intel_get_tex_image(ctx, target, level, format, type, pixels,
 675                        texObj, texImage, 0);
 676
 677
 678 }
 679
 680 void
 681 intelGetCompressedTexImage(GLcontext *ctx, GLenum target, GLint level,
 682                            GLvoid *pixels,
 683                            struct gl_texture_object *texObj,
 684                            struct gl_texture_image *texImage)
 685 {
 686    intel_get_tex_image(ctx, target, level, 0, 0, pixels,
 687                        texObj, texImage, 1);
 688 }
 689
 690 void
 691 intelSetTexOffset(__DRIcontext *pDRICtx, GLint texname,
 692                   unsigned long long offset, GLint depth, GLuint pitch)
 693 {
 694    struct intel_context *intel = pDRICtx->driverPrivate;
 695    struct gl_texture_object *tObj = _mesa_lookup_texture(&intel->ctx, texname);
 696    struct intel_texture_object *intelObj = intel_texture_object(tObj);
 697
 698    if (!intelObj)
 699       return;
 700
 701    if (intelObj->mt)
 702       intel_miptree_release(intel, &intelObj->mt);
 703
 704    intelObj->imageOverride = GL_TRUE;
 705    intelObj->depthOverride = depth;
 706    intelObj->pitchOverride = pitch;
 707
 708    if (offset)
 709       intelObj->textureOffset = offset;
 710 }
 711
 712 void
 713 intelSetTexBuffer(__DRIcontext *pDRICtx, GLint target, __DRIdrawable *dPriv)
 714 {
 715    struct intel_framebuffer *intel_fb = dPriv->driverPrivate;
 716    struct intel_context *intel = pDRICtx->driverPrivate;
 717    struct intel_texture_object *intelObj;
 718    struct intel_texture_image *intelImage;
 719    struct intel_mipmap_tree *mt;
 720    struct intel_renderbuffer *rb;
 721    struct gl_texture_unit *texUnit;
 722    struct gl_texture_object *texObj;
 723    struct gl_texture_image *texImage;
 724    int level = 0, type, format, internalFormat;
 725
 726    texUnit = &intel->ctx.Texture.Unit[intel->ctx.Texture.CurrentUnit];
 727    texObj = _mesa_select_tex_object(&intel->ctx, texUnit, target);
 728    intelObj = intel_texture_object(texObj);
 729
 730    if (!intelObj)
 731       return;
 732
 733    intel_update_renderbuffers(pDRICtx, dPriv);
 734
 735    rb = intel_fb->color_rb[0];
 736    /* If the region isn't set, then intel_update_renderbuffers was unable
 737     * to get the buffers for the drawable.
 738     */
 739    if (rb->region == NULL)
 740       return;
 741
 742    type = GL_BGRA;
 743    format = GL_UNSIGNED_BYTE;
 744    internalFormat = (rb->region->cpp == 3 ? 3 : 4);
 745
 746    mt = intel_miptree_create_for_region(intel, target,
 747                                         internalFormat,
 748                                         0, 0, rb->region, 1, 0);
 749    if (mt == NULL)
 750        return;
 751
 752    _mesa_lock_texture(&intel->ctx, texObj);
 753
 754    if (intelObj->mt)
 755       intel_miptree_release(intel, &intelObj->mt);
 756
 757    intelObj->mt = mt;
 758    texImage = _mesa_get_tex_image(&intel->ctx, texObj, target, level);
 759    _mesa_init_teximage_fields(&intel->ctx, target, texImage,
 760                               rb->region->width, rb->region->height, 1,
 761                               0, internalFormat);
 762
 763    intelImage = intel_texture_image(texImage);
 764    intelImage->face = target_to_face(target);
 765    intelImage->level = level;
 766    texImage->TexFormat = intelChooseTextureFormat(&intel->ctx, internalFormat,
 767                                                   type, format);
 768    _mesa_set_fetch_functions(texImage, 2);
 769    texImage->RowStride = rb->region->pitch;
 770    intel_miptree_reference(&intelImage->mt, intelObj->mt);
 771
 772    if (!intel_miptree_match_image(intelObj->mt, &intelImage->base,
 773                                   intelImage->face, intelImage->level)) {
 774            fprintf(stderr, "miptree doesn't match image\n");
 775    }
 776
 777    _mesa_unlock_texture(&intel->ctx, texObj);
 778 }