src/mesa/drivers/dri/i965/intel_tex_image.c

   1
   2 #include "main/macros.h"
   3 #include "main/mtypes.h"
   4 #include "main/enums.h"
   5 #include "main/bufferobj.h"
   6 #include "main/context.h"
   7 #include "main/formats.h"
   8 #include "main/glformats.h"
   9 #include "main/image.h"
  10 #include "main/pbo.h"
  11 #include "main/renderbuffer.h"
  12 #include "main/texcompress.h"
  13 #include "main/texgetimage.h"
  14 #include "main/texobj.h"
  15 #include "main/teximage.h"
  16 #include "main/texstore.h"
  17
  18 #include "drivers/common/meta.h"
  19
  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 #include "intel_image.h"
  27 #include "intel_tiled_memcpy.h"
  28 #include "brw_context.h"
  29
  30 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
  31
  32 /* Work back from the specified level of the image to the baselevel and create a
  33  * miptree of that size.
  34  */
  35 struct intel_mipmap_tree *
  36 intel_miptree_create_for_teximage(struct brw_context *brw,
  37                                   struct intel_texture_object *intelObj,
  38                                   struct intel_texture_image *intelImage,
  39                                   uint32_t layout_flags)
  40 {
  41    GLuint lastLevel;
  42    int width, height, depth;
  43    GLuint i;
  44
  45    intel_get_image_dims(&intelImage->base.Base, &width, &height, &depth);
  46
  47    DBG("%s\n", __func__);
  48
  49    /* Figure out image dimensions at start level. */
  50    for (i = intelImage->base.Base.Level; i > 0; i--) {
  51       width <<= 1;
  52       if (height != 1)
  53          height <<= 1;
  54       if (intelObj->base.Target == GL_TEXTURE_3D)
  55          depth <<= 1;
  56    }
  57
  58    /* Guess a reasonable value for lastLevel.  This is probably going
  59     * to be wrong fairly often and might mean that we have to look at
  60     * resizable buffers, or require that buffers implement lazy
  61     * pagetable arrangements.
  62     */
  63    if ((intelObj->base.Sampler.MinFilter == GL_NEAREST ||
  64         intelObj->base.Sampler.MinFilter == GL_LINEAR) &&
  65        intelImage->base.Base.Level == 0 &&
  66        !intelObj->base.GenerateMipmap) {
  67       lastLevel = 0;
  68    } else {
  69       lastLevel = _mesa_get_tex_max_num_levels(intelObj->base.Target,
  70                                                width, height, depth) - 1;
  71    }
  72
  73    return intel_miptree_create(brw,
  74                                intelObj->base.Target,
  75                                intelImage->base.Base.TexFormat,
  76                                0,
  77                                lastLevel,
  78                                width,
  79                                height,
  80                                depth,
  81                                intelImage->base.Base.NumSamples,
  82                                layout_flags | MIPTREE_LAYOUT_TILING_ANY);
  83 }
  84
  85 static void
  86 intelTexImage(struct gl_context * ctx,
  87               GLuint dims,
  88               struct gl_texture_image *texImage,
  89               GLenum format, GLenum type, const void *pixels,
  90               const struct gl_pixelstore_attrib *unpack)
  91 {
  92    struct intel_texture_image *intelImage = intel_texture_image(texImage);
  93    bool ok;
  94
  95    bool tex_busy = intelImage->mt && drm_intel_bo_busy(intelImage->mt->bo);
  96
  97    DBG("%s mesa_format %s target %s format %s type %s level %d %dx%dx%d\n",
  98        __func__, _mesa_get_format_name(texImage->TexFormat),
  99        _mesa_enum_to_string(texImage->TexObject->Target),
 100        _mesa_enum_to_string(format), _mesa_enum_to_string(type),
 101        texImage->Level, texImage->Width, texImage->Height, texImage->Depth);
 102
 103    /* Allocate storage for texture data. */
 104    if (!ctx->Driver.AllocTextureImageBuffer(ctx, texImage)) {
 105       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage%uD", dims);
 106       return;
 107    }
 108
 109    assert(intelImage->mt);
 110
 111    ok = _mesa_meta_pbo_TexSubImage(ctx, dims, texImage, 0, 0, 0,
 112                                    texImage->Width, texImage->Height,
 113                                    texImage->Depth,
 114                                    format, type, pixels,
 115                                    tex_busy, unpack);
 116    if (ok)
 117       return;
 118
 119    ok = intel_texsubimage_tiled_memcpy(ctx, dims, texImage,
 120                                        0, 0, 0, /*x,y,z offsets*/
 121                                        texImage->Width,
 122                                        texImage->Height,
 123                                        texImage->Depth,
 124                                        format, type, pixels, unpack,
 125                                        false /*allocate_storage*/);
 126    if (ok)
 127       return;
 128
 129    DBG("%s: upload image %dx%dx%d pixels %p\n",
 130        __func__, texImage->Width, texImage->Height, texImage->Depth,
 131        pixels);
 132
 133    _mesa_store_teximage(ctx, dims, texImage,
 134                         format, type, pixels, unpack);
 135 }
 136
 137
 138 /**
 139  * Binds a BO to a texture image, as if it was uploaded by glTexImage2D().
 140  *
 141  * Used for GLX_EXT_texture_from_pixmap and EGL image extensions,
 142  */
 143 static void
 144 intel_set_texture_image_bo(struct gl_context *ctx,
 145                            struct gl_texture_image *image,
 146                            drm_intel_bo *bo,
 147                            GLenum target,
 148                            GLenum internalFormat,
 149                            mesa_format format,
 150                            uint32_t offset,
 151                            GLuint width, GLuint height,
 152                            GLuint pitch,
 153                            GLuint tile_x, GLuint tile_y,
 154                            uint32_t layout_flags)
 155 {
 156    struct brw_context *brw = brw_context(ctx);
 157    struct intel_texture_image *intel_image = intel_texture_image(image);
 158    struct gl_texture_object *texobj = image->TexObject;
 159    struct intel_texture_object *intel_texobj = intel_texture_object(texobj);
 160    uint32_t draw_x, draw_y;
 161
 162    _mesa_init_teximage_fields(&brw->ctx, image,
 163                               width, height, 1,
 164                               0, internalFormat, format);
 165
 166    ctx->Driver.FreeTextureImageBuffer(ctx, image);
 167
 168    intel_image->mt = intel_miptree_create_for_bo(brw, bo, image->TexFormat,
 169                                                  0, width, height, 1, pitch,
 170                                                  layout_flags);
 171    if (intel_image->mt == NULL)
 172        return;
 173    intel_image->mt->target = target;
 174    intel_image->mt->total_width = width;
 175    intel_image->mt->total_height = height;
 176    intel_image->mt->level[0].slice[0].x_offset = tile_x;
 177    intel_image->mt->level[0].slice[0].y_offset = tile_y;
 178
 179    intel_miptree_get_tile_offsets(intel_image->mt, 0, 0, &draw_x, &draw_y);
 180
 181    /* From "OES_EGL_image" error reporting. We report GL_INVALID_OPERATION
 182     * for EGL images from non-tile aligned sufaces in gen4 hw and earlier which has
 183     * trouble resolving back to destination image due to alignment issues.
 184     */
 185    if (!brw->has_surface_tile_offset &&
 186        (draw_x != 0 || draw_y != 0)) {
 187       _mesa_error(ctx, GL_INVALID_OPERATION, __func__);
 188       intel_miptree_release(&intel_image->mt);
 189       return;
 190    }
 191
 192    intel_texobj->needs_validate = true;
 193
 194    intel_image->mt->offset = offset;
 195    assert(pitch % intel_image->mt->cpp == 0);
 196    intel_image->base.RowStride = pitch / intel_image->mt->cpp;
 197
 198    /* Immediately validate the image to the object. */
 199    intel_miptree_reference(&intel_texobj->mt, intel_image->mt);
 200 }
 201
 202 void
 203 intelSetTexBuffer2(__DRIcontext *pDRICtx, GLint target,
 204                    GLint texture_format,
 205                    __DRIdrawable *dPriv)
 206 {
 207    struct gl_framebuffer *fb = dPriv->driverPrivate;
 208    struct brw_context *brw = pDRICtx->driverPrivate;
 209    struct gl_context *ctx = &brw->ctx;
 210    struct intel_renderbuffer *rb;
 211    struct gl_texture_object *texObj;
 212    struct gl_texture_image *texImage;
 213    int level = 0, internalFormat = 0;
 214    mesa_format texFormat = MESA_FORMAT_NONE;
 215
 216    texObj = _mesa_get_current_tex_object(ctx, target);
 217
 218    if (!texObj)
 219       return;
 220
 221    if (dPriv->lastStamp != dPriv->dri2.stamp ||
 222        !pDRICtx->driScreenPriv->dri2.useInvalidate)
 223       intel_update_renderbuffers(pDRICtx, dPriv);
 224
 225    rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 226    /* If the miptree isn't set, then intel_update_renderbuffers was unable
 227     * to get the BO for the drawable from the window system.
 228     */
 229    if (!rb || !rb->mt)
 230       return;
 231
 232    if (rb->mt->cpp == 4) {
 233       if (texture_format == __DRI_TEXTURE_FORMAT_RGB) {
 234          internalFormat = GL_RGB;
 235          texFormat = MESA_FORMAT_B8G8R8X8_UNORM;
 236       }
 237       else {
 238          internalFormat = GL_RGBA;
 239          texFormat = MESA_FORMAT_B8G8R8A8_UNORM;
 240       }
 241    } else if (rb->mt->cpp == 2) {
 242       internalFormat = GL_RGB;
 243       texFormat = MESA_FORMAT_B5G6R5_UNORM;
 244    }
 245
 246    _mesa_lock_texture(&brw->ctx, texObj);
 247    texImage = _mesa_get_tex_image(ctx, texObj, target, level);
 248    intel_miptree_make_shareable(brw, rb->mt);
 249    intel_set_texture_image_bo(ctx, texImage, rb->mt->bo, target,
 250                               internalFormat, texFormat, 0,
 251                               rb->Base.Base.Width,
 252                               rb->Base.Base.Height,
 253                               rb->mt->pitch,
 254                               0, 0, 0);
 255    _mesa_unlock_texture(&brw->ctx, texObj);
 256 }
 257
 258 static GLboolean
 259 intel_bind_renderbuffer_tex_image(struct gl_context *ctx,
 260                                   struct gl_renderbuffer *rb,
 261                                   struct gl_texture_image *image)
 262 {
 263    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 264    struct intel_texture_image *intel_image = intel_texture_image(image);
 265    struct gl_texture_object *texobj = image->TexObject;
 266    struct intel_texture_object *intel_texobj = intel_texture_object(texobj);
 267
 268    /* We can only handle RB allocated with AllocRenderbufferStorage, or
 269     * window-system renderbuffers.
 270     */
 271    assert(!rb->TexImage);
 272
 273    if (!irb->mt)
 274       return false;
 275
 276    _mesa_lock_texture(ctx, texobj);
 277    _mesa_init_teximage_fields(ctx, image,
 278                               rb->Width, rb->Height, 1,
 279                               0, rb->InternalFormat, rb->Format);
 280    image->NumSamples = rb->NumSamples;
 281
 282    intel_miptree_reference(&intel_image->mt, irb->mt);
 283
 284    /* Immediately validate the image to the object. */
 285    intel_miptree_reference(&intel_texobj->mt, intel_image->mt);
 286
 287    intel_texobj->needs_validate = true;
 288    _mesa_unlock_texture(ctx, texobj);
 289
 290    return true;
 291 }
 292
 293 void
 294 intelSetTexBuffer(__DRIcontext *pDRICtx, GLint target, __DRIdrawable *dPriv)
 295 {
 296    /* The old interface didn't have the format argument, so copy our
 297     * implementation's behavior at the time.
 298     */
 299    intelSetTexBuffer2(pDRICtx, target, __DRI_TEXTURE_FORMAT_RGBA, dPriv);
 300 }
 301
 302 static void
 303 intel_image_target_texture_2d(struct gl_context *ctx, GLenum target,
 304                               struct gl_texture_object *texObj,
 305                               struct gl_texture_image *texImage,
 306                               GLeglImageOES image_handle)
 307 {
 308    struct brw_context *brw = brw_context(ctx);
 309    __DRIscreen *screen;
 310    __DRIimage *image;
 311
 312    screen = brw->intelScreen->driScrnPriv;
 313    image = screen->dri2.image->lookupEGLImage(screen, image_handle,
 314                                               screen->loaderPrivate);
 315    if (image == NULL)
 316       return;
 317
 318    /* We support external textures only for EGLImages created with
 319     * EGL_EXT_image_dma_buf_import. We may lift that restriction in the future.
 320     */
 321    if (target == GL_TEXTURE_EXTERNAL_OES && !image->dma_buf_imported) {
 322       _mesa_error(ctx, GL_INVALID_OPERATION,
 323             "glEGLImageTargetTexture2DOES(external target is enabled only "
 324                "for images created with EGL_EXT_image_dma_buf_import");
 325       return;
 326    }
 327
 328    /* Disallow depth/stencil textures: we don't have a way to pass the
 329     * separate stencil miptree of a GL_DEPTH_STENCIL texture through.
 330     */
 331    if (image->has_depthstencil) {
 332       _mesa_error(ctx, GL_INVALID_OPERATION, __func__);
 333       return;
 334    }
 335
 336    /* Disable creation of the texture's aux buffers because the driver exposes
 337     * no EGL API to manage them. That is, there is no API for resolving the aux
 338     * buffer's content to the main buffer nor for invalidating the aux buffer's
 339     * content.
 340     */
 341    intel_set_texture_image_bo(ctx, texImage, image->bo,
 342                               target, image->internal_format,
 343                               image->format, image->offset,
 344                               image->width,  image->height,
 345                               image->pitch,
 346                               image->tile_x, image->tile_y,
 347                               MIPTREE_LAYOUT_DISABLE_AUX);
 348 }
 349
 350 /**
 351  * \brief A fast path for glGetTexImage.
 352  *
 353  * \see intel_readpixels_tiled_memcpy()
 354  */
 355 bool
 356 intel_gettexsubimage_tiled_memcpy(struct gl_context *ctx,
 357                                   struct gl_texture_image *texImage,
 358                                   GLint xoffset, GLint yoffset,
 359                                   GLsizei width, GLsizei height,
 360                                   GLenum format, GLenum type,
 361                                   GLvoid *pixels,
 362                                   const struct gl_pixelstore_attrib *packing)
 363 {
 364    struct brw_context *brw = brw_context(ctx);
 365    struct intel_texture_image *image = intel_texture_image(texImage);
 366    int dst_pitch;
 367
 368    /* The miptree's buffer. */
 369    drm_intel_bo *bo;
 370
 371    int error = 0;
 372
 373    uint32_t cpp;
 374    mem_copy_fn mem_copy = NULL;
 375
 376    /* This fastpath is restricted to specific texture types:
 377     * a 2D BGRA, RGBA, L8 or A8 texture. It could be generalized to support
 378     * more types.
 379     *
 380     * FINISHME: The restrictions below on packing alignment and packing row
 381     * length are likely unneeded now because we calculate the destination stride
 382     * with _mesa_image_row_stride. However, before removing the restrictions
 383     * we need tests.
 384     */
 385    if (!brw->has_llc ||
 386        !(type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) ||
 387        !(texImage->TexObject->Target == GL_TEXTURE_2D ||
 388          texImage->TexObject->Target == GL_TEXTURE_RECTANGLE) ||
 389        pixels == NULL ||
 390        _mesa_is_bufferobj(packing->BufferObj) ||
 391        packing->Alignment > 4 ||
 392        packing->SkipPixels > 0 ||
 393        packing->SkipRows > 0 ||
 394        (packing->RowLength != 0 && packing->RowLength != width) ||
 395        packing->SwapBytes ||
 396        packing->LsbFirst ||
 397        packing->Invert)
 398       return false;
 399
 400    /* We can't handle copying from RGBX or BGRX because the tiled_memcpy
 401     * function doesn't set the last channel to 1. Note this checks BaseFormat
 402     * rather than TexFormat in case the RGBX format is being simulated with an
 403     * RGBA format.
 404     */
 405    if (texImage->_BaseFormat == GL_RGB)
 406       return false;
 407
 408    if (!intel_get_memcpy(texImage->TexFormat, format, type, &mem_copy, &cpp))
 409       return false;
 410
 411    /* If this is a nontrivial texture view, let another path handle it instead. */
 412    if (texImage->TexObject->MinLayer)
 413       return false;
 414
 415    if (!image->mt ||
 416        (image->mt->tiling != I915_TILING_X &&
 417        image->mt->tiling != I915_TILING_Y)) {
 418       /* The algorithm is written only for X- or Y-tiled memory. */
 419       return false;
 420    }
 421
 422    /* Since we are going to write raw data to the miptree, we need to resolve
 423     * any pending fast color clears before we start.
 424     */
 425    intel_miptree_resolve_color(brw, image->mt, 0);
 426
 427    bo = image->mt->bo;
 428
 429    if (drm_intel_bo_references(brw->batch.bo, bo)) {
 430       perf_debug("Flushing before mapping a referenced bo.\n");
 431       intel_batchbuffer_flush(brw);
 432    }
 433
 434    error = brw_bo_map(brw, bo, false /* write enable */, "miptree");
 435    if (error) {
 436       DBG("%s: failed to map bo\n", __func__);
 437       return false;
 438    }
 439
 440    dst_pitch = _mesa_image_row_stride(packing, width, format, type);
 441
 442    DBG("%s: level=%d x,y=(%d,%d) (w,h)=(%d,%d) format=0x%x type=0x%x "
 443        "mesa_format=0x%x tiling=%d "
 444        "packing=(alignment=%d row_length=%d skip_pixels=%d skip_rows=%d)\n",
 445        __func__, texImage->Level, xoffset, yoffset, width, height,
 446        format, type, texImage->TexFormat, image->mt->tiling,
 447        packing->Alignment, packing->RowLength, packing->SkipPixels,
 448        packing->SkipRows);
 449
 450    int level = texImage->Level + texImage->TexObject->MinLevel;
 451
 452    /* Adjust x and y offset based on miplevel */
 453    xoffset += image->mt->level[level].level_x;
 454    yoffset += image->mt->level[level].level_y;
 455
 456    tiled_to_linear(
 457       xoffset * cpp, (xoffset + width) * cpp,
 458       yoffset, yoffset + height,
 459       pixels - (ptrdiff_t) yoffset * dst_pitch - (ptrdiff_t) xoffset * cpp,
 460       bo->virtual,
 461       dst_pitch, image->mt->pitch,
 462       brw->has_swizzling,
 463       image->mt->tiling,
 464       mem_copy
 465    );
 466
 467    drm_intel_bo_unmap(bo);
 468    return true;
 469 }
 470
 471 static void
 472 intel_get_tex_sub_image(struct gl_context *ctx,
 473                         GLint xoffset, GLint yoffset, GLint zoffset,
 474                         GLsizei width, GLsizei height, GLint depth,
 475                         GLenum format, GLenum type, GLvoid *pixels,
 476                         struct gl_texture_image *texImage)
 477 {
 478    struct brw_context *brw = brw_context(ctx);
 479    bool ok;
 480
 481    DBG("%s\n", __func__);
 482
 483    if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
 484       if (_mesa_meta_pbo_GetTexSubImage(ctx, 3, texImage,
 485                                         xoffset, yoffset, zoffset,
 486                                         width, height, depth, format, type,
 487                                         pixels, &ctx->Pack)) {
 488          /* Flush to guarantee coherency between the render cache and other
 489           * caches the PBO could potentially be bound to after this point.
 490           * See the related comment in intelReadPixels() for a more detailed
 491           * explanation.
 492           */
 493          brw_emit_mi_flush(brw);
 494          return;
 495       }
 496
 497       perf_debug("%s: fallback to CPU mapping in PBO case\n", __func__);
 498    }
 499
 500    ok = intel_gettexsubimage_tiled_memcpy(ctx, texImage, xoffset, yoffset,
 501                                           width, height,
 502                                           format, type, pixels, &ctx->Pack);
 503
 504    if(ok)
 505       return;
 506
 507    _mesa_meta_GetTexSubImage(ctx, xoffset, yoffset, zoffset,
 508                              width, height, depth,
 509                              format, type, pixels, texImage);
 510
 511    DBG("%s - DONE\n", __func__);
 512 }
 513
 514 static void
 515 flush_astc_denorms(struct gl_context *ctx, GLuint dims,
 516                    struct gl_texture_image *texImage,
 517                    GLint xoffset, GLint yoffset, GLint zoffset,
 518                    GLsizei width, GLsizei height, GLsizei depth)
 519 {
 520    struct compressed_pixelstore store;
 521    _mesa_compute_compressed_pixelstore(dims, texImage->TexFormat,
 522                                        width, height, depth,
 523                                        &ctx->Unpack, &store);
 524
 525    for (int slice = 0; slice < store.CopySlices; slice++) {
 526
 527       /* Map dest texture buffer */
 528       GLubyte *dstMap;
 529       GLint dstRowStride;
 530       ctx->Driver.MapTextureImage(ctx, texImage, slice + zoffset,
 531                                   xoffset, yoffset, width, height,
 532                                   GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
 533                                   &dstMap, &dstRowStride);
 534       if (!dstMap)
 535          continue;
 536
 537       for (int i = 0; i < store.CopyRowsPerSlice; i++) {
 538
 539          /* An ASTC block is stored in little endian mode. The byte that
 540           * contains bits 0..7 is stored at the lower address in memory.
 541           */
 542          struct astc_void_extent {
 543             uint16_t header : 12;
 544             uint16_t dontcare[3];
 545             uint16_t R;
 546             uint16_t G;
 547             uint16_t B;
 548             uint16_t A;
 549          } *blocks = (struct astc_void_extent*) dstMap;
 550
 551          /* Iterate over every copied block in the row */
 552          for (int j = 0; j < store.CopyBytesPerRow / 16; j++) {
 553
 554             /* Check if the header matches that of an LDR void-extent block */
 555             if (blocks[j].header == 0xDFC) {
 556
 557                /* Flush UNORM16 values that would be denormalized */
 558                if (blocks[j].A < 4) blocks[j].A = 0;
 559                if (blocks[j].B < 4) blocks[j].B = 0;
 560                if (blocks[j].G < 4) blocks[j].G = 0;
 561                if (blocks[j].R < 4) blocks[j].R = 0;
 562             }
 563          }
 564
 565          dstMap += dstRowStride;
 566       }
 567
 568       ctx->Driver.UnmapTextureImage(ctx, texImage, slice + zoffset);
 569    }
 570 }
 571
 572
 573 static void
 574 intelCompressedTexSubImage(struct gl_context *ctx, GLuint dims,
 575                         struct gl_texture_image *texImage,
 576                         GLint xoffset, GLint yoffset, GLint zoffset,
 577                         GLsizei width, GLsizei height, GLsizei depth,
 578                         GLenum format,
 579                         GLsizei imageSize, const GLvoid *data)
 580 {
 581    /* Upload the compressed data blocks */
 582    _mesa_store_compressed_texsubimage(ctx, dims, texImage,
 583                                       xoffset, yoffset, zoffset,
 584                                       width, height, depth,
 585                                       format, imageSize, data);
 586
 587    /* Fix up copied ASTC blocks if necessary */
 588    GLenum gl_format = _mesa_compressed_format_to_glenum(ctx,
 589                                                         texImage->TexFormat);
 590    bool is_linear_astc = _mesa_is_astc_format(gl_format) &&
 591                         !_mesa_is_srgb_format(gl_format);
 592    struct brw_context *brw = (struct brw_context*) ctx;
 593    if (brw->gen == 9 && is_linear_astc)
 594       flush_astc_denorms(ctx, dims, texImage,
 595                          xoffset, yoffset, zoffset,
 596                          width, height, depth);
 597 }
 598
 599 void
 600 intelInitTextureImageFuncs(struct dd_function_table *functions)
 601 {
 602    functions->TexImage = intelTexImage;
 603    functions->CompressedTexSubImage = intelCompressedTexSubImage;
 604    functions->EGLImageTargetTexture2D = intel_image_target_texture_2d;
 605    functions->BindRenderbufferTexImage = intel_bind_renderbuffer_tex_image;
 606    functions->GetTexSubImage = intel_get_tex_sub_image;
 607 }