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 gl_context *ctx = &brw->ctx;
 255    struct intel_mipmap_tree *mt;
 256    uint32_t draw_x, draw_y;
 257
 258    if (!ctx->TextureFormatSupported[image->format])
 259       return NULL;
 260
 261    /* Disable creation of the texture's aux buffers because the driver exposes
 262     * no EGL API to manage them. That is, there is no API for resolving the aux
 263     * buffer's content to the main buffer nor for invalidating the aux buffer's
 264     * content.
 265     */
 266    mt = intel_miptree_create_for_bo(brw, image->bo, image->format,
 267                                     0, image->width, image->height, 1,
 268                                     image->pitch,
 269                                     MIPTREE_LAYOUT_DISABLE_AUX);
 270    if (mt == NULL)
 271       return NULL;
 272
 273    mt->target = target;
 274    mt->total_width = image->width;
 275    mt->total_height = image->height;
 276    mt->level[0].slice[0].x_offset = image->tile_x;
 277    mt->level[0].slice[0].y_offset = image->tile_y;
 278
 279    intel_miptree_get_tile_offsets(mt, 0, 0, &draw_x, &draw_y);
 280
 281    /* From "OES_EGL_image" error reporting. We report GL_INVALID_OPERATION
 282     * for EGL images from non-tile aligned sufaces in gen4 hw and earlier which has
 283     * trouble resolving back to destination image due to alignment issues.
 284     */
 285    if (!brw->has_surface_tile_offset &&
 286        (draw_x != 0 || draw_y != 0)) {
 287       _mesa_error(&brw->ctx, GL_INVALID_OPERATION, __func__);
 288       intel_miptree_release(&mt);
 289       return NULL;
 290    }
 291
 292    mt->offset = image->offset;
 293
 294    return mt;
 295 }
 296
 297 void
 298 intelSetTexBuffer2(__DRIcontext *pDRICtx, GLint target,
 299                    GLint texture_format,
 300                    __DRIdrawable *dPriv)
 301 {
 302    struct gl_framebuffer *fb = dPriv->driverPrivate;
 303    struct brw_context *brw = pDRICtx->driverPrivate;
 304    struct gl_context *ctx = &brw->ctx;
 305    struct intel_renderbuffer *rb;
 306    struct gl_texture_object *texObj;
 307    struct gl_texture_image *texImage;
 308    mesa_format texFormat = MESA_FORMAT_NONE;
 309    struct intel_mipmap_tree *mt;
 310    GLenum internal_format = 0;
 311
 312    texObj = _mesa_get_current_tex_object(ctx, target);
 313
 314    if (!texObj)
 315       return;
 316
 317    if (dPriv->lastStamp != dPriv->dri2.stamp ||
 318        !pDRICtx->driScreenPriv->dri2.useInvalidate)
 319       intel_update_renderbuffers(pDRICtx, dPriv);
 320
 321    rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 322    /* If the miptree isn't set, then intel_update_renderbuffers was unable
 323     * to get the BO for the drawable from the window system.
 324     */
 325    if (!rb || !rb->mt)
 326       return;
 327
 328    if (rb->mt->cpp == 4) {
 329       if (texture_format == __DRI_TEXTURE_FORMAT_RGB) {
 330          internal_format = GL_RGB;
 331          texFormat = MESA_FORMAT_B8G8R8X8_UNORM;
 332       }
 333       else {
 334          internal_format = GL_RGBA;
 335          texFormat = MESA_FORMAT_B8G8R8A8_UNORM;
 336       }
 337    } else if (rb->mt->cpp == 2) {
 338       internal_format = GL_RGB;
 339       texFormat = MESA_FORMAT_B5G6R5_UNORM;
 340    }
 341
 342    intel_miptree_make_shareable(brw, rb->mt);
 343    mt = intel_miptree_create_for_bo(brw, rb->mt->bo, texFormat, 0,
 344                                     rb->Base.Base.Width,
 345                                     rb->Base.Base.Height,
 346                                     1, rb->mt->pitch, 0);
 347    if (mt == NULL)
 348        return;
 349    mt->target = target;
 350    mt->total_width = rb->Base.Base.Width;
 351    mt->total_height = rb->Base.Base.Height;
 352
 353    _mesa_lock_texture(&brw->ctx, texObj);
 354    texImage = _mesa_get_tex_image(ctx, texObj, target, 0);
 355    intel_set_texture_image_mt(brw, texImage, internal_format, mt);
 356    intel_miptree_release(&mt);
 357    _mesa_unlock_texture(&brw->ctx, texObj);
 358 }
 359
 360 static GLboolean
 361 intel_bind_renderbuffer_tex_image(struct gl_context *ctx,
 362                                   struct gl_renderbuffer *rb,
 363                                   struct gl_texture_image *image)
 364 {
 365    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 366    struct intel_texture_image *intel_image = intel_texture_image(image);
 367    struct gl_texture_object *texobj = image->TexObject;
 368    struct intel_texture_object *intel_texobj = intel_texture_object(texobj);
 369
 370    /* We can only handle RB allocated with AllocRenderbufferStorage, or
 371     * window-system renderbuffers.
 372     */
 373    assert(!rb->TexImage);
 374
 375    if (!irb->mt)
 376       return false;
 377
 378    _mesa_lock_texture(ctx, texobj);
 379    _mesa_init_teximage_fields(ctx, image,
 380                               rb->Width, rb->Height, 1,
 381                               0, rb->InternalFormat, rb->Format);
 382    image->NumSamples = rb->NumSamples;
 383
 384    intel_miptree_reference(&intel_image->mt, irb->mt);
 385
 386    /* Immediately validate the image to the object. */
 387    intel_miptree_reference(&intel_texobj->mt, intel_image->mt);
 388
 389    intel_texobj->needs_validate = true;
 390    _mesa_unlock_texture(ctx, texobj);
 391
 392    return true;
 393 }
 394
 395 void
 396 intelSetTexBuffer(__DRIcontext *pDRICtx, GLint target, __DRIdrawable *dPriv)
 397 {
 398    /* The old interface didn't have the format argument, so copy our
 399     * implementation's behavior at the time.
 400     */
 401    intelSetTexBuffer2(pDRICtx, target, __DRI_TEXTURE_FORMAT_RGBA, dPriv);
 402 }
 403
 404 static void
 405 intel_image_target_texture_2d(struct gl_context *ctx, GLenum target,
 406                               struct gl_texture_object *texObj,
 407                               struct gl_texture_image *texImage,
 408                               GLeglImageOES image_handle)
 409 {
 410    struct brw_context *brw = brw_context(ctx);
 411    struct intel_mipmap_tree *mt;
 412    __DRIscreen *dri_screen = brw->screen->driScrnPriv;
 413    __DRIimage *image;
 414
 415    image = dri_screen->dri2.image->lookupEGLImage(dri_screen, image_handle,
 416                                                   dri_screen->loaderPrivate);
 417    if (image == NULL)
 418       return;
 419
 420    /* We support external textures only for EGLImages created with
 421     * EGL_EXT_image_dma_buf_import. We may lift that restriction in the future.
 422     */
 423    if (target == GL_TEXTURE_EXTERNAL_OES && !image->dma_buf_imported) {
 424       _mesa_error(ctx, GL_INVALID_OPERATION,
 425             "glEGLImageTargetTexture2DOES(external target is enabled only "
 426                "for images created with EGL_EXT_image_dma_buf_import");
 427       return;
 428    }
 429
 430    /* Disallow depth/stencil textures: we don't have a way to pass the
 431     * separate stencil miptree of a GL_DEPTH_STENCIL texture through.
 432     */
 433    if (image->has_depthstencil) {
 434       _mesa_error(ctx, GL_INVALID_OPERATION, __func__);
 435       return;
 436    }
 437
 438    if (image->planar_format && image->planar_format->nplanes > 0)
 439       mt = create_mt_for_planar_dri_image(brw, target, image);
 440    else
 441       mt = create_mt_for_dri_image(brw, target, image);
 442    if (mt == NULL)
 443       return;
 444
 445    struct intel_texture_object *intel_texobj = intel_texture_object(texObj);
 446    intel_texobj->planar_format = image->planar_format;
 447
 448    const GLenum internal_format =
 449       image->internal_format != 0 ?
 450       image->internal_format : _mesa_get_format_base_format(mt->format);
 451    intel_set_texture_image_mt(brw, texImage, internal_format, mt);
 452    intel_miptree_release(&mt);
 453 }
 454
 455 /**
 456  * \brief A fast path for glGetTexImage.
 457  *
 458  * \see intel_readpixels_tiled_memcpy()
 459  */
 460 bool
 461 intel_gettexsubimage_tiled_memcpy(struct gl_context *ctx,
 462                                   struct gl_texture_image *texImage,
 463                                   GLint xoffset, GLint yoffset,
 464                                   GLsizei width, GLsizei height,
 465                                   GLenum format, GLenum type,
 466                                   GLvoid *pixels,
 467                                   const struct gl_pixelstore_attrib *packing)
 468 {
 469    struct brw_context *brw = brw_context(ctx);
 470    struct intel_texture_image *image = intel_texture_image(texImage);
 471    int dst_pitch;
 472
 473    /* The miptree's buffer. */
 474    struct brw_bo *bo;
 475
 476    uint32_t cpp;
 477    mem_copy_fn mem_copy = NULL;
 478
 479    /* This fastpath is restricted to specific texture types:
 480     * a 2D BGRA, RGBA, L8 or A8 texture. It could be generalized to support
 481     * more types.
 482     *
 483     * FINISHME: The restrictions below on packing alignment and packing row
 484     * length are likely unneeded now because we calculate the destination stride
 485     * with _mesa_image_row_stride. However, before removing the restrictions
 486     * we need tests.
 487     */
 488    if (!brw->has_llc ||
 489        !(type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) ||
 490        !(texImage->TexObject->Target == GL_TEXTURE_2D ||
 491          texImage->TexObject->Target == GL_TEXTURE_RECTANGLE) ||
 492        pixels == NULL ||
 493        _mesa_is_bufferobj(packing->BufferObj) ||
 494        packing->Alignment > 4 ||
 495        packing->SkipPixels > 0 ||
 496        packing->SkipRows > 0 ||
 497        (packing->RowLength != 0 && packing->RowLength != width) ||
 498        packing->SwapBytes ||
 499        packing->LsbFirst ||
 500        packing->Invert)
 501       return false;
 502
 503    /* We can't handle copying from RGBX or BGRX because the tiled_memcpy
 504     * function doesn't set the last channel to 1. Note this checks BaseFormat
 505     * rather than TexFormat in case the RGBX format is being simulated with an
 506     * RGBA format.
 507     */
 508    if (texImage->_BaseFormat == GL_RGB)
 509       return false;
 510
 511    if (!intel_get_memcpy(texImage->TexFormat, format, type, &mem_copy, &cpp))
 512       return false;
 513
 514    /* If this is a nontrivial texture view, let another path handle it instead. */
 515    if (texImage->TexObject->MinLayer)
 516       return false;
 517
 518    if (!image->mt ||
 519        (image->mt->tiling != I915_TILING_X &&
 520        image->mt->tiling != I915_TILING_Y)) {
 521       /* The algorithm is written only for X- or Y-tiled memory. */
 522       return false;
 523    }
 524
 525    /* tiled_to_linear() assumes that if the object is swizzled, it is using
 526     * I915_BIT6_SWIZZLE_9_10 for X and I915_BIT6_SWIZZLE_9 for Y.  This is only
 527     * true on gen5 and above.
 528     *
 529     * The killer on top is that some gen4 have an L-shaped swizzle mode, where
 530     * parts of the memory aren't swizzled at all. Userspace just can't handle
 531     * that.
 532     */
 533    if (brw->gen < 5 && brw->has_swizzling)
 534       return false;
 535
 536    int level = texImage->Level + texImage->TexObject->MinLevel;
 537
 538    /* Since we are going to write raw data to the miptree, we need to resolve
 539     * any pending fast color clears before we start.
 540     */
 541    assert(image->mt->logical_depth0 == 1);
 542    intel_miptree_resolve_color(brw, image->mt, level, 1, 0, 1, 0);
 543
 544    bo = image->mt->bo;
 545
 546    if (brw_batch_references(&brw->batch, bo)) {
 547       perf_debug("Flushing before mapping a referenced bo.\n");
 548       intel_batchbuffer_flush(brw);
 549    }
 550
 551    void *map = brw_bo_map(brw, bo, MAP_READ | MAP_RAW);
 552    if (map == NULL) {
 553       DBG("%s: failed to map bo\n", __func__);
 554       return false;
 555    }
 556
 557    dst_pitch = _mesa_image_row_stride(packing, width, format, type);
 558
 559    DBG("%s: level=%d x,y=(%d,%d) (w,h)=(%d,%d) format=0x%x type=0x%x "
 560        "mesa_format=0x%x tiling=%d "
 561        "packing=(alignment=%d row_length=%d skip_pixels=%d skip_rows=%d)\n",
 562        __func__, texImage->Level, xoffset, yoffset, width, height,
 563        format, type, texImage->TexFormat, image->mt->tiling,
 564        packing->Alignment, packing->RowLength, packing->SkipPixels,
 565        packing->SkipRows);
 566
 567    /* Adjust x and y offset based on miplevel */
 568    xoffset += image->mt->level[level].level_x;
 569    yoffset += image->mt->level[level].level_y;
 570
 571    tiled_to_linear(
 572       xoffset * cpp, (xoffset + width) * cpp,
 573       yoffset, yoffset + height,
 574       pixels - (ptrdiff_t) yoffset * dst_pitch - (ptrdiff_t) xoffset * cpp,
 575       map,
 576       dst_pitch, image->mt->pitch,
 577       brw->has_swizzling,
 578       image->mt->tiling,
 579       mem_copy
 580    );
 581
 582    brw_bo_unmap(bo);
 583    return true;
 584 }
 585
 586 static void
 587 intel_get_tex_sub_image(struct gl_context *ctx,
 588                         GLint xoffset, GLint yoffset, GLint zoffset,
 589                         GLsizei width, GLsizei height, GLint depth,
 590                         GLenum format, GLenum type, GLvoid *pixels,
 591                         struct gl_texture_image *texImage)
 592 {
 593    struct brw_context *brw = brw_context(ctx);
 594    bool ok;
 595
 596    DBG("%s\n", __func__);
 597
 598    if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
 599       if (_mesa_meta_pbo_GetTexSubImage(ctx, 3, texImage,
 600                                         xoffset, yoffset, zoffset,
 601                                         width, height, depth, format, type,
 602                                         pixels, &ctx->Pack)) {
 603          /* Flush to guarantee coherency between the render cache and other
 604           * caches the PBO could potentially be bound to after this point.
 605           * See the related comment in intelReadPixels() for a more detailed
 606           * explanation.
 607           */
 608          brw_emit_mi_flush(brw);
 609          return;
 610       }
 611
 612       perf_debug("%s: fallback to CPU mapping in PBO case\n", __func__);
 613    }
 614
 615    ok = intel_gettexsubimage_tiled_memcpy(ctx, texImage, xoffset, yoffset,
 616                                           width, height,
 617                                           format, type, pixels, &ctx->Pack);
 618
 619    if(ok)
 620       return;
 621
 622    _mesa_meta_GetTexSubImage(ctx, xoffset, yoffset, zoffset,
 623                              width, height, depth,
 624                              format, type, pixels, texImage);
 625
 626    DBG("%s - DONE\n", __func__);
 627 }
 628
 629 static void
 630 flush_astc_denorms(struct gl_context *ctx, GLuint dims,
 631                    struct gl_texture_image *texImage,
 632                    GLint xoffset, GLint yoffset, GLint zoffset,
 633                    GLsizei width, GLsizei height, GLsizei depth)
 634 {
 635    struct compressed_pixelstore store;
 636    _mesa_compute_compressed_pixelstore(dims, texImage->TexFormat,
 637                                        width, height, depth,
 638                                        &ctx->Unpack, &store);
 639
 640    for (int slice = 0; slice < store.CopySlices; slice++) {
 641
 642       /* Map dest texture buffer */
 643       GLubyte *dstMap;
 644       GLint dstRowStride;
 645       ctx->Driver.MapTextureImage(ctx, texImage, slice + zoffset,
 646                                   xoffset, yoffset, width, height,
 647                                   GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
 648                                   &dstMap, &dstRowStride);
 649       if (!dstMap)
 650          continue;
 651
 652       for (int i = 0; i < store.CopyRowsPerSlice; i++) {
 653
 654          /* An ASTC block is stored in little endian mode. The byte that
 655           * contains bits 0..7 is stored at the lower address in memory.
 656           */
 657          struct astc_void_extent {
 658             uint16_t header : 12;
 659             uint16_t dontcare[3];
 660             uint16_t R;
 661             uint16_t G;
 662             uint16_t B;
 663             uint16_t A;
 664          } *blocks = (struct astc_void_extent*) dstMap;
 665
 666          /* Iterate over every copied block in the row */
 667          for (int j = 0; j < store.CopyBytesPerRow / 16; j++) {
 668
 669             /* Check if the header matches that of an LDR void-extent block */
 670             if (blocks[j].header == 0xDFC) {
 671
 672                /* Flush UNORM16 values that would be denormalized */
 673                if (blocks[j].A < 4) blocks[j].A = 0;
 674                if (blocks[j].B < 4) blocks[j].B = 0;
 675                if (blocks[j].G < 4) blocks[j].G = 0;
 676                if (blocks[j].R < 4) blocks[j].R = 0;
 677             }
 678          }
 679
 680          dstMap += dstRowStride;
 681       }
 682
 683       ctx->Driver.UnmapTextureImage(ctx, texImage, slice + zoffset);
 684    }
 685 }
 686
 687
 688 static void
 689 intelCompressedTexSubImage(struct gl_context *ctx, GLuint dims,
 690                         struct gl_texture_image *texImage,
 691                         GLint xoffset, GLint yoffset, GLint zoffset,
 692                         GLsizei width, GLsizei height, GLsizei depth,
 693                         GLenum format,
 694                         GLsizei imageSize, const GLvoid *data)
 695 {
 696    /* Upload the compressed data blocks */
 697    _mesa_store_compressed_texsubimage(ctx, dims, texImage,
 698                                       xoffset, yoffset, zoffset,
 699                                       width, height, depth,
 700                                       format, imageSize, data);
 701
 702    /* Fix up copied ASTC blocks if necessary */
 703    GLenum gl_format = _mesa_compressed_format_to_glenum(ctx,
 704                                                         texImage->TexFormat);
 705    bool is_linear_astc = _mesa_is_astc_format(gl_format) &&
 706                         !_mesa_is_srgb_format(gl_format);
 707    struct brw_context *brw = (struct brw_context*) ctx;
 708    if (brw->gen == 9 && is_linear_astc)
 709       flush_astc_denorms(ctx, dims, texImage,
 710                          xoffset, yoffset, zoffset,
 711                          width, height, depth);
 712 }
 713
 714 void
 715 intelInitTextureImageFuncs(struct dd_function_table *functions)
 716 {
 717    functions->TexImage = intelTexImage;
 718    functions->CompressedTexSubImage = intelCompressedTexSubImage;
 719    functions->EGLImageTargetTexture2D = intel_image_target_texture_2d;
 720    functions->BindRenderbufferTexImage = intel_bind_renderbuffer_tex_image;
 721    functions->GetTexSubImage = intel_get_tex_sub_image;
 722 }