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    unsigned old_width = 0, old_height = 0, old_depth = 0;
  60    const struct intel_mipmap_tree *old_mt = intelObj->mt;
  61    const unsigned level = intelImage->base.Base.Level;
  62
  63    intel_get_image_dims(&intelImage->base.Base, &width, &height, &depth);
  64
  65    if (old_mt && old_mt->surf.size > 0) {
  66       old_width = old_mt->surf.logical_level0_px.width;
  67       old_height = old_mt->surf.logical_level0_px.height;
  68       old_depth = old_mt->surf.dim == ISL_SURF_DIM_3D ?
  69                      old_mt->surf.logical_level0_px.depth :
  70                      old_mt->surf.logical_level0_px.array_len;
  71    } else if (old_mt) {
  72       old_width = old_mt->logical_width0;
  73       old_height = old_mt->logical_height0;
  74       old_depth = old_mt->logical_depth0;
  75    }
  76
  77    DBG("%s\n", __func__);
  78
  79    /* Figure out image dimensions at start level. */
  80    switch(intelObj->base.Target) {
  81    case GL_TEXTURE_2D_MULTISAMPLE:
  82    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
  83    case GL_TEXTURE_RECTANGLE:
  84    case GL_TEXTURE_EXTERNAL_OES:
  85       assert(level == 0);
  86       break;
  87    case GL_TEXTURE_3D:
  88       depth = old_mt ? get_base_dim(old_depth, depth, level) :
  89                        depth << level;
  90       /* Fall through */
  91    case GL_TEXTURE_2D:
  92    case GL_TEXTURE_2D_ARRAY:
  93    case GL_TEXTURE_CUBE_MAP:
  94    case GL_TEXTURE_CUBE_MAP_ARRAY:
  95       height = old_mt ? get_base_dim(old_height, height, level) :
  96                         height << level;
  97       /* Fall through */
  98    case GL_TEXTURE_1D:
  99    case GL_TEXTURE_1D_ARRAY:
 100       width = old_mt ? get_base_dim(old_width, width, level) :
 101                        width << level;
 102       break;
 103    default:
 104       unreachable("Unexpected target");
 105    }
 106
 107    /* Guess a reasonable value for lastLevel.  This is probably going
 108     * to be wrong fairly often and might mean that we have to look at
 109     * resizable buffers, or require that buffers implement lazy
 110     * pagetable arrangements.
 111     */
 112    if ((intelObj->base.Sampler.MinFilter == GL_NEAREST ||
 113         intelObj->base.Sampler.MinFilter == GL_LINEAR) &&
 114        intelImage->base.Base.Level == 0 &&
 115        !intelObj->base.GenerateMipmap) {
 116       lastLevel = 0;
 117    } else {
 118       lastLevel = _mesa_get_tex_max_num_levels(intelObj->base.Target,
 119                                                width, height, depth) - 1;
 120    }
 121
 122    return intel_miptree_create(brw,
 123                                intelObj->base.Target,
 124                                intelImage->base.Base.TexFormat,
 125                                0,
 126                                lastLevel,
 127                                width,
 128                                height,
 129                                depth,
 130                                intelImage->base.Base.NumSamples,
 131                                layout_flags | MIPTREE_LAYOUT_TILING_ANY);
 132 }
 133
 134 static void
 135 intelTexImage(struct gl_context * ctx,
 136               GLuint dims,
 137               struct gl_texture_image *texImage,
 138               GLenum format, GLenum type, const void *pixels,
 139               const struct gl_pixelstore_attrib *unpack)
 140 {
 141    struct intel_texture_image *intelImage = intel_texture_image(texImage);
 142    bool ok;
 143
 144    bool tex_busy = intelImage->mt && brw_bo_busy(intelImage->mt->bo);
 145
 146    DBG("%s mesa_format %s target %s format %s type %s level %d %dx%dx%d\n",
 147        __func__, _mesa_get_format_name(texImage->TexFormat),
 148        _mesa_enum_to_string(texImage->TexObject->Target),
 149        _mesa_enum_to_string(format), _mesa_enum_to_string(type),
 150        texImage->Level, texImage->Width, texImage->Height, texImage->Depth);
 151
 152    /* Allocate storage for texture data. */
 153    if (!ctx->Driver.AllocTextureImageBuffer(ctx, texImage)) {
 154       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage%uD", dims);
 155       return;
 156    }
 157
 158    assert(intelImage->mt);
 159
 160    if (intelImage->mt->format == MESA_FORMAT_S_UINT8)
 161       intelImage->mt->r8stencil_needs_update = true;
 162
 163    ok = _mesa_meta_pbo_TexSubImage(ctx, dims, texImage, 0, 0, 0,
 164                                    texImage->Width, texImage->Height,
 165                                    texImage->Depth,
 166                                    format, type, pixels,
 167                                    tex_busy, unpack);
 168    if (ok)
 169       return;
 170
 171    ok = intel_texsubimage_tiled_memcpy(ctx, dims, texImage,
 172                                        0, 0, 0, /*x,y,z offsets*/
 173                                        texImage->Width,
 174                                        texImage->Height,
 175                                        texImage->Depth,
 176                                        format, type, pixels, unpack,
 177                                        false /*allocate_storage*/);
 178    if (ok)
 179       return;
 180
 181    DBG("%s: upload image %dx%dx%d pixels %p\n",
 182        __func__, texImage->Width, texImage->Height, texImage->Depth,
 183        pixels);
 184
 185    _mesa_store_teximage(ctx, dims, texImage,
 186                         format, type, pixels, unpack);
 187 }
 188
 189
 190 static void
 191 intel_set_texture_image_mt(struct brw_context *brw,
 192                            struct gl_texture_image *image,
 193                            GLenum internal_format,
 194                            struct intel_mipmap_tree *mt)
 195
 196 {
 197    struct gl_texture_object *texobj = image->TexObject;
 198    struct intel_texture_object *intel_texobj = intel_texture_object(texobj);
 199    struct intel_texture_image *intel_image = intel_texture_image(image);
 200
 201    _mesa_init_teximage_fields(&brw->ctx, image,
 202                               mt->logical_width0, mt->logical_height0, 1,
 203                               0, internal_format, mt->format);
 204
 205    brw->ctx.Driver.FreeTextureImageBuffer(&brw->ctx, image);
 206
 207    intel_texobj->needs_validate = true;
 208    intel_image->base.RowStride = mt->pitch / mt->cpp;
 209    assert(mt->pitch % mt->cpp == 0);
 210
 211    intel_miptree_reference(&intel_image->mt, mt);
 212
 213    /* Immediately validate the image to the object. */
 214    intel_miptree_reference(&intel_texobj->mt, mt);
 215 }
 216
 217 static struct intel_mipmap_tree *
 218 create_mt_for_planar_dri_image(struct brw_context *brw,
 219                                GLenum target, __DRIimage *image)
 220 {
 221    struct intel_image_format *f = image->planar_format;
 222    struct intel_mipmap_tree *planar_mt;
 223
 224    for (int i = 0; i < f->nplanes; i++) {
 225       const int index = f->planes[i].buffer_index;
 226       const uint32_t dri_format = f->planes[i].dri_format;
 227       const mesa_format format = driImageFormatToGLFormat(dri_format);
 228       const uint32_t width = image->width >> f->planes[i].width_shift;
 229       const uint32_t height = image->height >> f->planes[i].height_shift;
 230
 231       /* Disable creation of the texture's aux buffers because the driver
 232        * exposes no EGL API to manage them. That is, there is no API for
 233        * resolving the aux buffer's content to the main buffer nor for
 234        * invalidating the aux buffer's content.
 235        */
 236       struct intel_mipmap_tree *mt =
 237          intel_miptree_create_for_bo(brw, image->bo, format,
 238                                      image->offsets[index],
 239                                      width, height, 1,
 240                                      image->strides[index],
 241                                      MIPTREE_LAYOUT_DISABLE_AUX);
 242       if (mt == NULL)
 243          return NULL;
 244
 245       mt->target = target;
 246       mt->total_width = width;
 247       mt->total_height = height;
 248
 249       if (i == 0)
 250          planar_mt = mt;
 251       else
 252          planar_mt->plane[i - 1] = mt;
 253    }
 254
 255    return planar_mt;
 256 }
 257
 258 /**
 259  * Binds a BO to a texture image, as if it was uploaded by glTexImage2D().
 260  *
 261  * Used for GLX_EXT_texture_from_pixmap and EGL image extensions,
 262  */
 263 static struct intel_mipmap_tree *
 264 create_mt_for_dri_image(struct brw_context *brw,
 265                         GLenum target, __DRIimage *image)
 266 {
 267    struct gl_context *ctx = &brw->ctx;
 268    struct intel_mipmap_tree *mt;
 269    uint32_t draw_x, draw_y;
 270
 271    if (!ctx->TextureFormatSupported[image->format])
 272       return NULL;
 273
 274    /* Disable creation of the texture's aux buffers because the driver exposes
 275     * no EGL API to manage them. That is, there is no API for resolving the aux
 276     * buffer's content to the main buffer nor for invalidating the aux buffer's
 277     * content.
 278     */
 279    mt = intel_miptree_create_for_bo(brw, image->bo, image->format,
 280                                     0, image->width, image->height, 1,
 281                                     image->pitch,
 282                                     MIPTREE_LAYOUT_DISABLE_AUX);
 283    if (mt == NULL)
 284       return NULL;
 285
 286    mt->target = target;
 287    mt->total_width = image->width;
 288    mt->total_height = image->height;
 289    mt->level[0].slice[0].x_offset = image->tile_x;
 290    mt->level[0].slice[0].y_offset = image->tile_y;
 291
 292    intel_miptree_get_tile_offsets(mt, 0, 0, &draw_x, &draw_y);
 293
 294    /* From "OES_EGL_image" error reporting. We report GL_INVALID_OPERATION
 295     * for EGL images from non-tile aligned sufaces in gen4 hw and earlier which has
 296     * trouble resolving back to destination image due to alignment issues.
 297     */
 298    if (!brw->has_surface_tile_offset &&
 299        (draw_x != 0 || draw_y != 0)) {
 300       _mesa_error(&brw->ctx, GL_INVALID_OPERATION, __func__);
 301       intel_miptree_release(&mt);
 302       return NULL;
 303    }
 304
 305    mt->offset = image->offset;
 306
 307    return mt;
 308 }
 309
 310 void
 311 intelSetTexBuffer2(__DRIcontext *pDRICtx, GLint target,
 312                    GLint texture_format,
 313                    __DRIdrawable *dPriv)
 314 {
 315    struct gl_framebuffer *fb = dPriv->driverPrivate;
 316    struct brw_context *brw = pDRICtx->driverPrivate;
 317    struct gl_context *ctx = &brw->ctx;
 318    struct intel_renderbuffer *rb;
 319    struct gl_texture_object *texObj;
 320    struct gl_texture_image *texImage;
 321    mesa_format texFormat = MESA_FORMAT_NONE;
 322    struct intel_mipmap_tree *mt;
 323    GLenum internal_format = 0;
 324
 325    texObj = _mesa_get_current_tex_object(ctx, target);
 326
 327    if (!texObj)
 328       return;
 329
 330    if (dPriv->lastStamp != dPriv->dri2.stamp ||
 331        !pDRICtx->driScreenPriv->dri2.useInvalidate)
 332       intel_update_renderbuffers(pDRICtx, dPriv);
 333
 334    rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 335    /* If the miptree isn't set, then intel_update_renderbuffers was unable
 336     * to get the BO for the drawable from the window system.
 337     */
 338    if (!rb || !rb->mt)
 339       return;
 340
 341    if (rb->mt->cpp == 4) {
 342       if (texture_format == __DRI_TEXTURE_FORMAT_RGB) {
 343          internal_format = GL_RGB;
 344          texFormat = MESA_FORMAT_B8G8R8X8_UNORM;
 345       }
 346       else {
 347          internal_format = GL_RGBA;
 348          texFormat = MESA_FORMAT_B8G8R8A8_UNORM;
 349       }
 350    } else if (rb->mt->cpp == 2) {
 351       internal_format = GL_RGB;
 352       texFormat = MESA_FORMAT_B5G6R5_UNORM;
 353    }
 354
 355    intel_miptree_make_shareable(brw, rb->mt);
 356    mt = intel_miptree_create_for_bo(brw, rb->mt->bo, texFormat, 0,
 357                                     rb->Base.Base.Width,
 358                                     rb->Base.Base.Height,
 359                                     1, rb->mt->pitch, 0);
 360    if (mt == NULL)
 361        return;
 362    mt->target = target;
 363    mt->total_width = rb->Base.Base.Width;
 364    mt->total_height = rb->Base.Base.Height;
 365
 366    _mesa_lock_texture(&brw->ctx, texObj);
 367    texImage = _mesa_get_tex_image(ctx, texObj, target, 0);
 368    intel_set_texture_image_mt(brw, texImage, internal_format, mt);
 369    intel_miptree_release(&mt);
 370    _mesa_unlock_texture(&brw->ctx, texObj);
 371 }
 372
 373 static GLboolean
 374 intel_bind_renderbuffer_tex_image(struct gl_context *ctx,
 375                                   struct gl_renderbuffer *rb,
 376                                   struct gl_texture_image *image)
 377 {
 378    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 379    struct intel_texture_image *intel_image = intel_texture_image(image);
 380    struct gl_texture_object *texobj = image->TexObject;
 381    struct intel_texture_object *intel_texobj = intel_texture_object(texobj);
 382
 383    /* We can only handle RB allocated with AllocRenderbufferStorage, or
 384     * window-system renderbuffers.
 385     */
 386    assert(!rb->TexImage);
 387
 388    if (!irb->mt)
 389       return false;
 390
 391    _mesa_lock_texture(ctx, texobj);
 392    _mesa_init_teximage_fields(ctx, image,
 393                               rb->Width, rb->Height, 1,
 394                               0, rb->InternalFormat, rb->Format);
 395    image->NumSamples = rb->NumSamples;
 396
 397    intel_miptree_reference(&intel_image->mt, irb->mt);
 398
 399    /* Immediately validate the image to the object. */
 400    intel_miptree_reference(&intel_texobj->mt, intel_image->mt);
 401
 402    intel_texobj->needs_validate = true;
 403    _mesa_unlock_texture(ctx, texobj);
 404
 405    return true;
 406 }
 407
 408 void
 409 intelSetTexBuffer(__DRIcontext *pDRICtx, GLint target, __DRIdrawable *dPriv)
 410 {
 411    /* The old interface didn't have the format argument, so copy our
 412     * implementation's behavior at the time.
 413     */
 414    intelSetTexBuffer2(pDRICtx, target, __DRI_TEXTURE_FORMAT_RGBA, dPriv);
 415 }
 416
 417 static void
 418 intel_image_target_texture_2d(struct gl_context *ctx, GLenum target,
 419                               struct gl_texture_object *texObj,
 420                               struct gl_texture_image *texImage,
 421                               GLeglImageOES image_handle)
 422 {
 423    struct brw_context *brw = brw_context(ctx);
 424    struct intel_mipmap_tree *mt;
 425    __DRIscreen *dri_screen = brw->screen->driScrnPriv;
 426    __DRIimage *image;
 427
 428    image = dri_screen->dri2.image->lookupEGLImage(dri_screen, image_handle,
 429                                                   dri_screen->loaderPrivate);
 430    if (image == NULL)
 431       return;
 432
 433    /* We support external textures only for EGLImages created with
 434     * EGL_EXT_image_dma_buf_import. We may lift that restriction in the future.
 435     */
 436    if (target == GL_TEXTURE_EXTERNAL_OES && !image->dma_buf_imported) {
 437       _mesa_error(ctx, GL_INVALID_OPERATION,
 438             "glEGLImageTargetTexture2DOES(external target is enabled only "
 439                "for images created with EGL_EXT_image_dma_buf_import");
 440       return;
 441    }
 442
 443    /* Disallow depth/stencil textures: we don't have a way to pass the
 444     * separate stencil miptree of a GL_DEPTH_STENCIL texture through.
 445     */
 446    if (image->has_depthstencil) {
 447       _mesa_error(ctx, GL_INVALID_OPERATION, __func__);
 448       return;
 449    }
 450
 451    if (image->planar_format && image->planar_format->nplanes > 0)
 452       mt = create_mt_for_planar_dri_image(brw, target, image);
 453    else
 454       mt = create_mt_for_dri_image(brw, target, image);
 455    if (mt == NULL)
 456       return;
 457
 458    struct intel_texture_object *intel_texobj = intel_texture_object(texObj);
 459    intel_texobj->planar_format = image->planar_format;
 460
 461    const GLenum internal_format =
 462       image->internal_format != 0 ?
 463       image->internal_format : _mesa_get_format_base_format(mt->format);
 464    intel_set_texture_image_mt(brw, texImage, internal_format, mt);
 465    intel_miptree_release(&mt);
 466 }
 467
 468 /**
 469  * \brief A fast path for glGetTexImage.
 470  *
 471  * \see intel_readpixels_tiled_memcpy()
 472  */
 473 bool
 474 intel_gettexsubimage_tiled_memcpy(struct gl_context *ctx,
 475                                   struct gl_texture_image *texImage,
 476                                   GLint xoffset, GLint yoffset,
 477                                   GLsizei width, GLsizei height,
 478                                   GLenum format, GLenum type,
 479                                   GLvoid *pixels,
 480                                   const struct gl_pixelstore_attrib *packing)
 481 {
 482    struct brw_context *brw = brw_context(ctx);
 483    struct intel_texture_image *image = intel_texture_image(texImage);
 484    int dst_pitch;
 485
 486    /* The miptree's buffer. */
 487    struct brw_bo *bo;
 488
 489    uint32_t cpp;
 490    mem_copy_fn mem_copy = NULL;
 491
 492    /* This fastpath is restricted to specific texture types:
 493     * a 2D BGRA, RGBA, L8 or A8 texture. It could be generalized to support
 494     * more types.
 495     *
 496     * FINISHME: The restrictions below on packing alignment and packing row
 497     * length are likely unneeded now because we calculate the destination stride
 498     * with _mesa_image_row_stride. However, before removing the restrictions
 499     * we need tests.
 500     */
 501    if (!brw->has_llc ||
 502        !(type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) ||
 503        !(texImage->TexObject->Target == GL_TEXTURE_2D ||
 504          texImage->TexObject->Target == GL_TEXTURE_RECTANGLE) ||
 505        pixels == NULL ||
 506        _mesa_is_bufferobj(packing->BufferObj) ||
 507        packing->Alignment > 4 ||
 508        packing->SkipPixels > 0 ||
 509        packing->SkipRows > 0 ||
 510        (packing->RowLength != 0 && packing->RowLength != width) ||
 511        packing->SwapBytes ||
 512        packing->LsbFirst ||
 513        packing->Invert)
 514       return false;
 515
 516    /* We can't handle copying from RGBX or BGRX because the tiled_memcpy
 517     * function doesn't set the last channel to 1. Note this checks BaseFormat
 518     * rather than TexFormat in case the RGBX format is being simulated with an
 519     * RGBA format.
 520     */
 521    if (texImage->_BaseFormat == GL_RGB)
 522       return false;
 523
 524    if (!intel_get_memcpy(texImage->TexFormat, format, type, &mem_copy, &cpp))
 525       return false;
 526
 527    /* If this is a nontrivial texture view, let another path handle it instead. */
 528    if (texImage->TexObject->MinLayer)
 529       return false;
 530
 531    if (!image->mt ||
 532        (image->mt->tiling != I915_TILING_X &&
 533        image->mt->tiling != I915_TILING_Y)) {
 534       /* The algorithm is written only for X- or Y-tiled memory. */
 535       return false;
 536    }
 537
 538    /* tiled_to_linear() assumes that if the object is swizzled, it is using
 539     * I915_BIT6_SWIZZLE_9_10 for X and I915_BIT6_SWIZZLE_9 for Y.  This is only
 540     * true on gen5 and above.
 541     *
 542     * The killer on top is that some gen4 have an L-shaped swizzle mode, where
 543     * parts of the memory aren't swizzled at all. Userspace just can't handle
 544     * that.
 545     */
 546    if (brw->gen < 5 && brw->has_swizzling)
 547       return false;
 548
 549    int level = texImage->Level + texImage->TexObject->MinLevel;
 550
 551    /* Since we are going to write raw data to the miptree, we need to resolve
 552     * any pending fast color clears before we start.
 553     */
 554    assert(image->mt->logical_depth0 == 1);
 555    intel_miptree_access_raw(brw, image->mt, level, 0, true);
 556
 557    bo = image->mt->bo;
 558
 559    if (brw_batch_references(&brw->batch, bo)) {
 560       perf_debug("Flushing before mapping a referenced bo.\n");
 561       intel_batchbuffer_flush(brw);
 562    }
 563
 564    void *map = brw_bo_map(brw, bo, MAP_READ | MAP_RAW);
 565    if (map == NULL) {
 566       DBG("%s: failed to map bo\n", __func__);
 567       return false;
 568    }
 569
 570    dst_pitch = _mesa_image_row_stride(packing, width, format, type);
 571
 572    DBG("%s: level=%d x,y=(%d,%d) (w,h)=(%d,%d) format=0x%x type=0x%x "
 573        "mesa_format=0x%x tiling=%d "
 574        "packing=(alignment=%d row_length=%d skip_pixels=%d skip_rows=%d)\n",
 575        __func__, texImage->Level, xoffset, yoffset, width, height,
 576        format, type, texImage->TexFormat, image->mt->tiling,
 577        packing->Alignment, packing->RowLength, packing->SkipPixels,
 578        packing->SkipRows);
 579
 580    /* Adjust x and y offset based on miplevel */
 581    xoffset += image->mt->level[level].level_x;
 582    yoffset += image->mt->level[level].level_y;
 583
 584    tiled_to_linear(
 585       xoffset * cpp, (xoffset + width) * cpp,
 586       yoffset, yoffset + height,
 587       pixels - (ptrdiff_t) yoffset * dst_pitch - (ptrdiff_t) xoffset * cpp,
 588       map,
 589       dst_pitch, image->mt->pitch,
 590       brw->has_swizzling,
 591       image->mt->tiling,
 592       mem_copy
 593    );
 594
 595    brw_bo_unmap(bo);
 596    return true;
 597 }
 598
 599 static void
 600 intel_get_tex_sub_image(struct gl_context *ctx,
 601                         GLint xoffset, GLint yoffset, GLint zoffset,
 602                         GLsizei width, GLsizei height, GLint depth,
 603                         GLenum format, GLenum type, GLvoid *pixels,
 604                         struct gl_texture_image *texImage)
 605 {
 606    struct brw_context *brw = brw_context(ctx);
 607    bool ok;
 608
 609    DBG("%s\n", __func__);
 610
 611    if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
 612       if (_mesa_meta_pbo_GetTexSubImage(ctx, 3, texImage,
 613                                         xoffset, yoffset, zoffset,
 614                                         width, height, depth, format, type,
 615                                         pixels, &ctx->Pack)) {
 616          /* Flush to guarantee coherency between the render cache and other
 617           * caches the PBO could potentially be bound to after this point.
 618           * See the related comment in intelReadPixels() for a more detailed
 619           * explanation.
 620           */
 621          brw_emit_mi_flush(brw);
 622          return;
 623       }
 624
 625       perf_debug("%s: fallback to CPU mapping in PBO case\n", __func__);
 626    }
 627
 628    ok = intel_gettexsubimage_tiled_memcpy(ctx, texImage, xoffset, yoffset,
 629                                           width, height,
 630                                           format, type, pixels, &ctx->Pack);
 631
 632    if(ok)
 633       return;
 634
 635    _mesa_meta_GetTexSubImage(ctx, xoffset, yoffset, zoffset,
 636                              width, height, depth,
 637                              format, type, pixels, texImage);
 638
 639    DBG("%s - DONE\n", __func__);
 640 }
 641
 642 static void
 643 flush_astc_denorms(struct gl_context *ctx, GLuint dims,
 644                    struct gl_texture_image *texImage,
 645                    GLint xoffset, GLint yoffset, GLint zoffset,
 646                    GLsizei width, GLsizei height, GLsizei depth)
 647 {
 648    struct compressed_pixelstore store;
 649    _mesa_compute_compressed_pixelstore(dims, texImage->TexFormat,
 650                                        width, height, depth,
 651                                        &ctx->Unpack, &store);
 652
 653    for (int slice = 0; slice < store.CopySlices; slice++) {
 654
 655       /* Map dest texture buffer */
 656       GLubyte *dstMap;
 657       GLint dstRowStride;
 658       ctx->Driver.MapTextureImage(ctx, texImage, slice + zoffset,
 659                                   xoffset, yoffset, width, height,
 660                                   GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
 661                                   &dstMap, &dstRowStride);
 662       if (!dstMap)
 663          continue;
 664
 665       for (int i = 0; i < store.CopyRowsPerSlice; i++) {
 666
 667          /* An ASTC block is stored in little endian mode. The byte that
 668           * contains bits 0..7 is stored at the lower address in memory.
 669           */
 670          struct astc_void_extent {
 671             uint16_t header : 12;
 672             uint16_t dontcare[3];
 673             uint16_t R;
 674             uint16_t G;
 675             uint16_t B;
 676             uint16_t A;
 677          } *blocks = (struct astc_void_extent*) dstMap;
 678
 679          /* Iterate over every copied block in the row */
 680          for (int j = 0; j < store.CopyBytesPerRow / 16; j++) {
 681
 682             /* Check if the header matches that of an LDR void-extent block */
 683             if (blocks[j].header == 0xDFC) {
 684
 685                /* Flush UNORM16 values that would be denormalized */
 686                if (blocks[j].A < 4) blocks[j].A = 0;
 687                if (blocks[j].B < 4) blocks[j].B = 0;
 688                if (blocks[j].G < 4) blocks[j].G = 0;
 689                if (blocks[j].R < 4) blocks[j].R = 0;
 690             }
 691          }
 692
 693          dstMap += dstRowStride;
 694       }
 695
 696       ctx->Driver.UnmapTextureImage(ctx, texImage, slice + zoffset);
 697    }
 698 }
 699
 700
 701 static void
 702 intelCompressedTexSubImage(struct gl_context *ctx, GLuint dims,
 703                         struct gl_texture_image *texImage,
 704                         GLint xoffset, GLint yoffset, GLint zoffset,
 705                         GLsizei width, GLsizei height, GLsizei depth,
 706                         GLenum format,
 707                         GLsizei imageSize, const GLvoid *data)
 708 {
 709    /* Upload the compressed data blocks */
 710    _mesa_store_compressed_texsubimage(ctx, dims, texImage,
 711                                       xoffset, yoffset, zoffset,
 712                                       width, height, depth,
 713                                       format, imageSize, data);
 714
 715    /* Fix up copied ASTC blocks if necessary */
 716    GLenum gl_format = _mesa_compressed_format_to_glenum(ctx,
 717                                                         texImage->TexFormat);
 718    bool is_linear_astc = _mesa_is_astc_format(gl_format) &&
 719                         !_mesa_is_srgb_format(gl_format);
 720    struct brw_context *brw = (struct brw_context*) ctx;
 721    if (brw->gen == 9 && is_linear_astc)
 722       flush_astc_denorms(ctx, dims, texImage,
 723                          xoffset, yoffset, zoffset,
 724                          width, height, depth);
 725 }
 726
 727 void
 728 intelInitTextureImageFuncs(struct dd_function_table *functions)
 729 {
 730    functions->TexImage = intelTexImage;
 731    functions->CompressedTexSubImage = intelCompressedTexSubImage;
 732    functions->EGLImageTargetTexture2D = intel_image_target_texture_2d;
 733    functions->BindRenderbufferTexImage = intel_bind_renderbuffer_tex_image;
 734    functions->GetTexSubImage = intel_get_tex_sub_image;
 735 }