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 /* Make sure one doesn't end up shrinking base level zero unnecessarily.
  33  * Determining the base level dimension by shifting higher level dimension
  34  * ends up in off-by-one value in case base level has NPOT size (for example,
  35  * 293 != 146 << 1).
  36  * Choose the original base level dimension when shifted dimensions agree.
  37  * Otherwise assume real resize is intended and use the new shifted value.
  38  */
  39 static unsigned
  40 get_base_dim(unsigned old_base_dim, unsigned new_level_dim, unsigned level)
  41 {
  42    const unsigned old_level_dim = old_base_dim >> level;
  43    const unsigned new_base_dim = new_level_dim << level;
  44
  45    return old_level_dim == new_level_dim ? old_base_dim : new_base_dim;
  46 }
  47
  48 /* Work back from the specified level of the image to the baselevel and create a
  49  * miptree of that size.
  50  */
  51 struct intel_mipmap_tree *
  52 intel_miptree_create_for_teximage(struct brw_context *brw,
  53                                   struct intel_texture_object *intelObj,
  54                                   struct intel_texture_image *intelImage,
  55                                   uint32_t layout_flags)
  56 {
  57    GLuint lastLevel;
  58    int width, height, depth;
  59    const struct intel_mipmap_tree *old_mt = intelObj->mt;
  60    const unsigned level = intelImage->base.Base.Level;
  61
  62    intel_get_image_dims(&intelImage->base.Base, &width, &height, &depth);
  63
  64    DBG("%s\n", __func__);
  65
  66    /* Figure out image dimensions at start level. */
  67    switch(intelObj->base.Target) {
  68    case GL_TEXTURE_2D_MULTISAMPLE:
  69    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
  70    case GL_TEXTURE_RECTANGLE:
  71    case GL_TEXTURE_EXTERNAL_OES:
  72       assert(level == 0);
  73       break;
  74    case GL_TEXTURE_3D:
  75       depth = old_mt ? get_base_dim(old_mt->logical_depth0, depth, level) :
  76                        depth << level;
  77       /* Fall through */
  78    case GL_TEXTURE_2D:
  79    case GL_TEXTURE_2D_ARRAY:
  80    case GL_TEXTURE_CUBE_MAP:
  81    case GL_TEXTURE_CUBE_MAP_ARRAY:
  82       height = old_mt ? get_base_dim(old_mt->logical_height0, height, level) :
  83                         height << level;
  84       /* Fall through */
  85    case GL_TEXTURE_1D:
  86    case GL_TEXTURE_1D_ARRAY:
  87       width = old_mt ? get_base_dim(old_mt->logical_width0, width, level) :
  88                        width << level;
  89       break;
  90    default:
  91       unreachable("Unexpected target");
  92    }
  93
  94    /* Guess a reasonable value for lastLevel.  This is probably going
  95     * to be wrong fairly often and might mean that we have to look at
  96     * resizable buffers, or require that buffers implement lazy
  97     * pagetable arrangements.
  98     */
  99    if ((intelObj->base.Sampler.MinFilter == GL_NEAREST ||
 100         intelObj->base.Sampler.MinFilter == GL_LINEAR) &&
 101        intelImage->base.Base.Level == 0 &&
 102        !intelObj->base.GenerateMipmap) {
 103       lastLevel = 0;
 104    } else {
 105       lastLevel = _mesa_get_tex_max_num_levels(intelObj->base.Target,
 106                                                width, height, depth) - 1;
 107    }
 108
 109    return intel_miptree_create(brw,
 110                                intelObj->base.Target,
 111                                intelImage->base.Base.TexFormat,
 112                                0,
 113                                lastLevel,
 114                                width,
 115                                height,
 116                                depth,
 117                                intelImage->base.Base.NumSamples,
 118                                layout_flags | MIPTREE_LAYOUT_TILING_ANY);
 119 }
 120
 121 static void
 122 intelTexImage(struct gl_context * ctx,
 123               GLuint dims,
 124               struct gl_texture_image *texImage,
 125               GLenum format, GLenum type, const void *pixels,
 126               const struct gl_pixelstore_attrib *unpack)
 127 {
 128    struct intel_texture_image *intelImage = intel_texture_image(texImage);
 129    bool ok;
 130
 131    bool tex_busy = intelImage->mt && brw_bo_busy(intelImage->mt->bo);
 132
 133    DBG("%s mesa_format %s target %s format %s type %s level %d %dx%dx%d\n",
 134        __func__, _mesa_get_format_name(texImage->TexFormat),
 135        _mesa_enum_to_string(texImage->TexObject->Target),
 136        _mesa_enum_to_string(format), _mesa_enum_to_string(type),
 137        texImage->Level, texImage->Width, texImage->Height, texImage->Depth);
 138
 139    /* Allocate storage for texture data. */
 140    if (!ctx->Driver.AllocTextureImageBuffer(ctx, texImage)) {
 141       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage%uD", dims);
 142       return;
 143    }
 144
 145    assert(intelImage->mt);
 146
 147    if (intelImage->mt->format == MESA_FORMAT_S_UINT8)
 148       intelImage->mt->r8stencil_needs_update = true;
 149
 150    ok = _mesa_meta_pbo_TexSubImage(ctx, dims, texImage, 0, 0, 0,
 151                                    texImage->Width, texImage->Height,
 152                                    texImage->Depth,
 153                                    format, type, pixels,
 154                                    tex_busy, unpack);
 155    if (ok)
 156       return;
 157
 158    ok = intel_texsubimage_tiled_memcpy(ctx, dims, texImage,
 159                                        0, 0, 0, /*x,y,z offsets*/
 160                                        texImage->Width,
 161                                        texImage->Height,
 162                                        texImage->Depth,
 163                                        format, type, pixels, unpack,
 164                                        false /*allocate_storage*/);
 165    if (ok)
 166       return;
 167
 168    DBG("%s: upload image %dx%dx%d pixels %p\n",
 169        __func__, texImage->Width, texImage->Height, texImage->Depth,
 170        pixels);
 171
 172    _mesa_store_teximage(ctx, dims, texImage,
 173                         format, type, pixels, unpack);
 174 }
 175
 176
 177 static void
 178 intel_set_texture_image_mt(struct brw_context *brw,
 179                            struct gl_texture_image *image,
 180                            GLenum internal_format,
 181                            struct intel_mipmap_tree *mt)
 182
 183 {
 184    struct gl_texture_object *texobj = image->TexObject;
 185    struct intel_texture_object *intel_texobj = intel_texture_object(texobj);
 186    struct intel_texture_image *intel_image = intel_texture_image(image);
 187
 188    _mesa_init_teximage_fields(&brw->ctx, image,
 189                               mt->logical_width0, mt->logical_height0, 1,
 190                               0, internal_format, mt->format);
 191
 192    brw->ctx.Driver.FreeTextureImageBuffer(&brw->ctx, image);
 193
 194    intel_texobj->needs_validate = true;
 195    intel_image->base.RowStride = mt->pitch / mt->cpp;
 196    assert(mt->pitch % mt->cpp == 0);
 197
 198    intel_miptree_reference(&intel_image->mt, mt);
 199
 200    /* Immediately validate the image to the object. */
 201    intel_miptree_reference(&intel_texobj->mt, mt);
 202 }
 203
 204 static struct intel_mipmap_tree *
 205 create_mt_for_planar_dri_image(struct brw_context *brw,
 206                                GLenum target, __DRIimage *image)
 207 {
 208    struct intel_image_format *f = image->planar_format;
 209    struct intel_mipmap_tree *planar_mt;
 210
 211    for (int i = 0; i < f->nplanes; i++) {
 212       const int index = f->planes[i].buffer_index;
 213       const uint32_t dri_format = f->planes[i].dri_format;
 214       const mesa_format format = driImageFormatToGLFormat(dri_format);
 215       const uint32_t width = image->width >> f->planes[i].width_shift;
 216       const uint32_t height = image->height >> f->planes[i].height_shift;
 217
 218       /* Disable creation of the texture's aux buffers because the driver
 219        * exposes no EGL API to manage them. That is, there is no API for
 220        * resolving the aux buffer's content to the main buffer nor for
 221        * invalidating the aux buffer's content.
 222        */
 223       struct intel_mipmap_tree *mt =
 224          intel_miptree_create_for_bo(brw, image->bo, format,
 225                                      image->offsets[index],
 226                                      width, height, 1,
 227                                      image->strides[index],
 228                                      MIPTREE_LAYOUT_DISABLE_AUX);
 229       if (mt == NULL)
 230          return NULL;
 231
 232       mt->target = target;
 233       mt->total_width = width;
 234       mt->total_height = height;
 235
 236       if (i == 0)
 237          planar_mt = mt;
 238       else
 239          planar_mt->plane[i - 1] = mt;
 240    }
 241
 242    return planar_mt;
 243 }
 244
 245 /**
 246  * Binds a BO to a texture image, as if it was uploaded by glTexImage2D().
 247  *
 248  * Used for GLX_EXT_texture_from_pixmap and EGL image extensions,
 249  */
 250 static struct intel_mipmap_tree *
 251 create_mt_for_dri_image(struct brw_context *brw,
 252                         GLenum target, __DRIimage *image)
 253 {
 254    struct intel_mipmap_tree *mt;
 255    uint32_t draw_x, draw_y;
 256
 257    /* Disable creation of the texture's aux buffers because the driver exposes
 258     * no EGL API to manage them. That is, there is no API for resolving the aux
 259     * buffer's content to the main buffer nor for invalidating the aux buffer's
 260     * content.
 261     */
 262    mt = intel_miptree_create_for_bo(brw, image->bo, image->format,
 263                                     0, image->width, image->height, 1,
 264                                     image->pitch,
 265                                     MIPTREE_LAYOUT_DISABLE_AUX);
 266    if (mt == NULL)
 267       return NULL;
 268
 269    mt->target = target;
 270    mt->total_width = image->width;
 271    mt->total_height = image->height;
 272    mt->level[0].slice[0].x_offset = image->tile_x;
 273    mt->level[0].slice[0].y_offset = image->tile_y;
 274
 275    intel_miptree_get_tile_offsets(mt, 0, 0, &draw_x, &draw_y);
 276
 277    /* From "OES_EGL_image" error reporting. We report GL_INVALID_OPERATION
 278     * for EGL images from non-tile aligned sufaces in gen4 hw and earlier which has
 279     * trouble resolving back to destination image due to alignment issues.
 280     */
 281    if (!brw->has_surface_tile_offset &&
 282        (draw_x != 0 || draw_y != 0)) {
 283       _mesa_error(&brw->ctx, GL_INVALID_OPERATION, __func__);
 284       intel_miptree_release(&mt);
 285       return NULL;
 286    }
 287
 288    mt->offset = image->offset;
 289
 290    return mt;
 291 }
 292
 293 void
 294 intelSetTexBuffer2(__DRIcontext *pDRICtx, GLint target,
 295                    GLint texture_format,
 296                    __DRIdrawable *dPriv)
 297 {
 298    struct gl_framebuffer *fb = dPriv->driverPrivate;
 299    struct brw_context *brw = pDRICtx->driverPrivate;
 300    struct gl_context *ctx = &brw->ctx;
 301    struct intel_renderbuffer *rb;
 302    struct gl_texture_object *texObj;
 303    struct gl_texture_image *texImage;
 304    mesa_format texFormat = MESA_FORMAT_NONE;
 305    struct intel_mipmap_tree *mt;
 306    GLenum internal_format = 0;
 307
 308    texObj = _mesa_get_current_tex_object(ctx, target);
 309
 310    if (!texObj)
 311       return;
 312
 313    if (dPriv->lastStamp != dPriv->dri2.stamp ||
 314        !pDRICtx->driScreenPriv->dri2.useInvalidate)
 315       intel_update_renderbuffers(pDRICtx, dPriv);
 316
 317    rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 318    /* If the miptree isn't set, then intel_update_renderbuffers was unable
 319     * to get the BO for the drawable from the window system.
 320     */
 321    if (!rb || !rb->mt)
 322       return;
 323
 324    if (rb->mt->cpp == 4) {
 325       if (texture_format == __DRI_TEXTURE_FORMAT_RGB) {
 326          internal_format = GL_RGB;
 327          texFormat = MESA_FORMAT_B8G8R8X8_UNORM;
 328       }
 329       else {
 330          internal_format = GL_RGBA;
 331          texFormat = MESA_FORMAT_B8G8R8A8_UNORM;
 332       }
 333    } else if (rb->mt->cpp == 2) {
 334       internal_format = GL_RGB;
 335       texFormat = MESA_FORMAT_B5G6R5_UNORM;
 336    }
 337
 338    intel_miptree_make_shareable(brw, rb->mt);
 339    mt = intel_miptree_create_for_bo(brw, rb->mt->bo, texFormat, 0,
 340                                     rb->Base.Base.Width,
 341                                     rb->Base.Base.Height,
 342                                     1, rb->mt->pitch, 0);
 343    if (mt == NULL)
 344        return;
 345    mt->target = target;
 346    mt->total_width = rb->Base.Base.Width;
 347    mt->total_height = rb->Base.Base.Height;
 348
 349    _mesa_lock_texture(&brw->ctx, texObj);
 350    texImage = _mesa_get_tex_image(ctx, texObj, target, 0);
 351    intel_set_texture_image_mt(brw, texImage, internal_format, mt);
 352    intel_miptree_release(&mt);
 353    _mesa_unlock_texture(&brw->ctx, texObj);
 354 }
 355
 356 static GLboolean
 357 intel_bind_renderbuffer_tex_image(struct gl_context *ctx,
 358                                   struct gl_renderbuffer *rb,
 359                                   struct gl_texture_image *image)
 360 {
 361    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 362    struct intel_texture_image *intel_image = intel_texture_image(image);
 363    struct gl_texture_object *texobj = image->TexObject;
 364    struct intel_texture_object *intel_texobj = intel_texture_object(texobj);
 365
 366    /* We can only handle RB allocated with AllocRenderbufferStorage, or
 367     * window-system renderbuffers.
 368     */
 369    assert(!rb->TexImage);
 370
 371    if (!irb->mt)
 372       return false;
 373
 374    _mesa_lock_texture(ctx, texobj);
 375    _mesa_init_teximage_fields(ctx, image,
 376                               rb->Width, rb->Height, 1,
 377                               0, rb->InternalFormat, rb->Format);
 378    image->NumSamples = rb->NumSamples;
 379
 380    intel_miptree_reference(&intel_image->mt, irb->mt);
 381
 382    /* Immediately validate the image to the object. */
 383    intel_miptree_reference(&intel_texobj->mt, intel_image->mt);
 384
 385    intel_texobj->needs_validate = true;
 386    _mesa_unlock_texture(ctx, texobj);
 387
 388    return true;
 389 }
 390
 391 void
 392 intelSetTexBuffer(__DRIcontext *pDRICtx, GLint target, __DRIdrawable *dPriv)
 393 {
 394    /* The old interface didn't have the format argument, so copy our
 395     * implementation's behavior at the time.
 396     */
 397    intelSetTexBuffer2(pDRICtx, target, __DRI_TEXTURE_FORMAT_RGBA, dPriv);
 398 }
 399
 400 static void
 401 intel_image_target_texture_2d(struct gl_context *ctx, GLenum target,
 402                               struct gl_texture_object *texObj,
 403                               struct gl_texture_image *texImage,
 404                               GLeglImageOES image_handle)
 405 {
 406    struct brw_context *brw = brw_context(ctx);
 407    struct intel_mipmap_tree *mt;
 408    __DRIscreen *dri_screen = brw->screen->driScrnPriv;
 409    __DRIimage *image;
 410
 411    image = dri_screen->dri2.image->lookupEGLImage(dri_screen, image_handle,
 412                                                   dri_screen->loaderPrivate);
 413    if (image == NULL)
 414       return;
 415
 416    /* We support external textures only for EGLImages created with
 417     * EGL_EXT_image_dma_buf_import. We may lift that restriction in the future.
 418     */
 419    if (target == GL_TEXTURE_EXTERNAL_OES && !image->dma_buf_imported) {
 420       _mesa_error(ctx, GL_INVALID_OPERATION,
 421             "glEGLImageTargetTexture2DOES(external target is enabled only "
 422                "for images created with EGL_EXT_image_dma_buf_import");
 423       return;
 424    }
 425
 426    /* Disallow depth/stencil textures: we don't have a way to pass the
 427     * separate stencil miptree of a GL_DEPTH_STENCIL texture through.
 428     */
 429    if (image->has_depthstencil) {
 430       _mesa_error(ctx, GL_INVALID_OPERATION, __func__);
 431       return;
 432    }
 433
 434    if (image->planar_format && image->planar_format->nplanes > 0)
 435       mt = create_mt_for_planar_dri_image(brw, target, image);
 436    else
 437       mt = create_mt_for_dri_image(brw, target, image);
 438    if (mt == NULL)
 439       return;
 440
 441    struct intel_texture_object *intel_texobj = intel_texture_object(texObj);
 442    intel_texobj->planar_format = image->planar_format;
 443
 444    const GLenum internal_format =
 445       image->internal_format != 0 ?
 446       image->internal_format : _mesa_get_format_base_format(mt->format);
 447    intel_set_texture_image_mt(brw, texImage, internal_format, mt);
 448    intel_miptree_release(&mt);
 449 }
 450
 451 /**
 452  * \brief A fast path for glGetTexImage.
 453  *
 454  * \see intel_readpixels_tiled_memcpy()
 455  */
 456 bool
 457 intel_gettexsubimage_tiled_memcpy(struct gl_context *ctx,
 458                                   struct gl_texture_image *texImage,
 459                                   GLint xoffset, GLint yoffset,
 460                                   GLsizei width, GLsizei height,
 461                                   GLenum format, GLenum type,
 462                                   GLvoid *pixels,
 463                                   const struct gl_pixelstore_attrib *packing)
 464 {
 465    struct brw_context *brw = brw_context(ctx);
 466    struct intel_texture_image *image = intel_texture_image(texImage);
 467    int dst_pitch;
 468
 469    /* The miptree's buffer. */
 470    struct brw_bo *bo;
 471
 472    int error = 0;
 473
 474    uint32_t cpp;
 475    mem_copy_fn mem_copy = NULL;
 476
 477    /* This fastpath is restricted to specific texture types:
 478     * a 2D BGRA, RGBA, L8 or A8 texture. It could be generalized to support
 479     * more types.
 480     *
 481     * FINISHME: The restrictions below on packing alignment and packing row
 482     * length are likely unneeded now because we calculate the destination stride
 483     * with _mesa_image_row_stride. However, before removing the restrictions
 484     * we need tests.
 485     */
 486    if (!brw->has_llc ||
 487        !(type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) ||
 488        !(texImage->TexObject->Target == GL_TEXTURE_2D ||
 489          texImage->TexObject->Target == GL_TEXTURE_RECTANGLE) ||
 490        pixels == NULL ||
 491        _mesa_is_bufferobj(packing->BufferObj) ||
 492        packing->Alignment > 4 ||
 493        packing->SkipPixels > 0 ||
 494        packing->SkipRows > 0 ||
 495        (packing->RowLength != 0 && packing->RowLength != width) ||
 496        packing->SwapBytes ||
 497        packing->LsbFirst ||
 498        packing->Invert)
 499       return false;
 500
 501    /* We can't handle copying from RGBX or BGRX because the tiled_memcpy
 502     * function doesn't set the last channel to 1. Note this checks BaseFormat
 503     * rather than TexFormat in case the RGBX format is being simulated with an
 504     * RGBA format.
 505     */
 506    if (texImage->_BaseFormat == GL_RGB)
 507       return false;
 508
 509    if (!intel_get_memcpy(texImage->TexFormat, format, type, &mem_copy, &cpp))
 510       return false;
 511
 512    /* If this is a nontrivial texture view, let another path handle it instead. */
 513    if (texImage->TexObject->MinLayer)
 514       return false;
 515
 516    if (!image->mt ||
 517        (image->mt->tiling != I915_TILING_X &&
 518        image->mt->tiling != I915_TILING_Y)) {
 519       /* The algorithm is written only for X- or Y-tiled memory. */
 520       return false;
 521    }
 522
 523    /* Since we are going to write raw data to the miptree, we need to resolve
 524     * any pending fast color clears before we start.
 525     */
 526    intel_miptree_all_slices_resolve_color(brw, image->mt, 0);
 527
 528    bo = image->mt->bo;
 529
 530    if (brw_batch_references(&brw->batch, bo)) {
 531       perf_debug("Flushing before mapping a referenced bo.\n");
 532       intel_batchbuffer_flush(brw);
 533    }
 534
 535    error = brw_bo_map(bo, false /* write enable */);
 536    if (error) {
 537       DBG("%s: failed to map bo\n", __func__);
 538       return false;
 539    }
 540
 541    dst_pitch = _mesa_image_row_stride(packing, width, format, type);
 542
 543    DBG("%s: level=%d x,y=(%d,%d) (w,h)=(%d,%d) format=0x%x type=0x%x "
 544        "mesa_format=0x%x tiling=%d "
 545        "packing=(alignment=%d row_length=%d skip_pixels=%d skip_rows=%d)\n",
 546        __func__, texImage->Level, xoffset, yoffset, width, height,
 547        format, type, texImage->TexFormat, image->mt->tiling,
 548        packing->Alignment, packing->RowLength, packing->SkipPixels,
 549        packing->SkipRows);
 550
 551    int level = texImage->Level + texImage->TexObject->MinLevel;
 552
 553    /* Adjust x and y offset based on miplevel */
 554    xoffset += image->mt->level[level].level_x;
 555    yoffset += image->mt->level[level].level_y;
 556
 557    tiled_to_linear(
 558       xoffset * cpp, (xoffset + width) * cpp,
 559       yoffset, yoffset + height,
 560       pixels - (ptrdiff_t) yoffset * dst_pitch - (ptrdiff_t) xoffset * cpp,
 561       bo->virtual,
 562       dst_pitch, image->mt->pitch,
 563       brw->has_swizzling,
 564       image->mt->tiling,
 565       mem_copy
 566    );
 567
 568    brw_bo_unmap(bo);
 569    return true;
 570 }
 571
 572 static void
 573 intel_get_tex_sub_image(struct gl_context *ctx,
 574                         GLint xoffset, GLint yoffset, GLint zoffset,
 575                         GLsizei width, GLsizei height, GLint depth,
 576                         GLenum format, GLenum type, GLvoid *pixels,
 577                         struct gl_texture_image *texImage)
 578 {
 579    struct brw_context *brw = brw_context(ctx);
 580    bool ok;
 581
 582    DBG("%s\n", __func__);
 583
 584    if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
 585       if (_mesa_meta_pbo_GetTexSubImage(ctx, 3, texImage,
 586                                         xoffset, yoffset, zoffset,
 587                                         width, height, depth, format, type,
 588                                         pixels, &ctx->Pack)) {
 589          /* Flush to guarantee coherency between the render cache and other
 590           * caches the PBO could potentially be bound to after this point.
 591           * See the related comment in intelReadPixels() for a more detailed
 592           * explanation.
 593           */
 594          brw_emit_mi_flush(brw);
 595          return;
 596       }
 597
 598       perf_debug("%s: fallback to CPU mapping in PBO case\n", __func__);
 599    }
 600
 601    ok = intel_gettexsubimage_tiled_memcpy(ctx, texImage, xoffset, yoffset,
 602                                           width, height,
 603                                           format, type, pixels, &ctx->Pack);
 604
 605    if(ok)
 606       return;
 607
 608    _mesa_meta_GetTexSubImage(ctx, xoffset, yoffset, zoffset,
 609                              width, height, depth,
 610                              format, type, pixels, texImage);
 611
 612    DBG("%s - DONE\n", __func__);
 613 }
 614
 615 static void
 616 flush_astc_denorms(struct gl_context *ctx, GLuint dims,
 617                    struct gl_texture_image *texImage,
 618                    GLint xoffset, GLint yoffset, GLint zoffset,
 619                    GLsizei width, GLsizei height, GLsizei depth)
 620 {
 621    struct compressed_pixelstore store;
 622    _mesa_compute_compressed_pixelstore(dims, texImage->TexFormat,
 623                                        width, height, depth,
 624                                        &ctx->Unpack, &store);
 625
 626    for (int slice = 0; slice < store.CopySlices; slice++) {
 627
 628       /* Map dest texture buffer */
 629       GLubyte *dstMap;
 630       GLint dstRowStride;
 631       ctx->Driver.MapTextureImage(ctx, texImage, slice + zoffset,
 632                                   xoffset, yoffset, width, height,
 633                                   GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
 634                                   &dstMap, &dstRowStride);
 635       if (!dstMap)
 636          continue;
 637
 638       for (int i = 0; i < store.CopyRowsPerSlice; i++) {
 639
 640          /* An ASTC block is stored in little endian mode. The byte that
 641           * contains bits 0..7 is stored at the lower address in memory.
 642           */
 643          struct astc_void_extent {
 644             uint16_t header : 12;
 645             uint16_t dontcare[3];
 646             uint16_t R;
 647             uint16_t G;
 648             uint16_t B;
 649             uint16_t A;
 650          } *blocks = (struct astc_void_extent*) dstMap;
 651
 652          /* Iterate over every copied block in the row */
 653          for (int j = 0; j < store.CopyBytesPerRow / 16; j++) {
 654
 655             /* Check if the header matches that of an LDR void-extent block */
 656             if (blocks[j].header == 0xDFC) {
 657
 658                /* Flush UNORM16 values that would be denormalized */
 659                if (blocks[j].A < 4) blocks[j].A = 0;
 660                if (blocks[j].B < 4) blocks[j].B = 0;
 661                if (blocks[j].G < 4) blocks[j].G = 0;
 662                if (blocks[j].R < 4) blocks[j].R = 0;
 663             }
 664          }
 665
 666          dstMap += dstRowStride;
 667       }
 668
 669       ctx->Driver.UnmapTextureImage(ctx, texImage, slice + zoffset);
 670    }
 671 }
 672
 673
 674 static void
 675 intelCompressedTexSubImage(struct gl_context *ctx, GLuint dims,
 676                         struct gl_texture_image *texImage,
 677                         GLint xoffset, GLint yoffset, GLint zoffset,
 678                         GLsizei width, GLsizei height, GLsizei depth,
 679                         GLenum format,
 680                         GLsizei imageSize, const GLvoid *data)
 681 {
 682    /* Upload the compressed data blocks */
 683    _mesa_store_compressed_texsubimage(ctx, dims, texImage,
 684                                       xoffset, yoffset, zoffset,
 685                                       width, height, depth,
 686                                       format, imageSize, data);
 687
 688    /* Fix up copied ASTC blocks if necessary */
 689    GLenum gl_format = _mesa_compressed_format_to_glenum(ctx,
 690                                                         texImage->TexFormat);
 691    bool is_linear_astc = _mesa_is_astc_format(gl_format) &&
 692                         !_mesa_is_srgb_format(gl_format);
 693    struct brw_context *brw = (struct brw_context*) ctx;
 694    if (brw->gen == 9 && is_linear_astc)
 695       flush_astc_denorms(ctx, dims, texImage,
 696                          xoffset, yoffset, zoffset,
 697                          width, height, depth);
 698 }
 699
 700 void
 701 intelInitTextureImageFuncs(struct dd_function_table *functions)
 702 {
 703    functions->TexImage = intelTexImage;
 704    functions->CompressedTexSubImage = intelCompressedTexSubImage;
 705    functions->EGLImageTargetTexture2D = intel_image_target_texture_2d;
 706    functions->BindRenderbufferTexImage = intel_bind_renderbuffer_tex_image;
 707    functions->GetTexSubImage = intel_get_tex_sub_image;
 708 }