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_fbo.h"
  25 #include "intel_image.h"
  26 #include "brw_context.h"
  27 #include "brw_blorp.h"
  28
  29 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
  30
  31 /* Make sure one doesn't end up shrinking base level zero unnecessarily.
  32  * Determining the base level dimension by shifting higher level dimension
  33  * ends up in off-by-one value in case base level has NPOT size (for example,
  34  * 293 != 146 << 1).
  35  * Choose the original base level dimension when shifted dimensions agree.
  36  * Otherwise assume real resize is intended and use the new shifted value.
  37  */
  38 static unsigned
  39 get_base_dim(unsigned old_base_dim, unsigned new_level_dim, unsigned level)
  40 {
  41    const unsigned old_level_dim = old_base_dim >> level;
  42    const unsigned new_base_dim = new_level_dim << level;
  43
  44    return old_level_dim == new_level_dim ? old_base_dim : new_base_dim;
  45 }
  46
  47 /* Work back from the specified level of the image to the baselevel and create a
  48  * miptree of that size.
  49  */
  50 struct intel_mipmap_tree *
  51 intel_miptree_create_for_teximage(struct brw_context *brw,
  52                                   struct intel_texture_object *intelObj,
  53                                   struct intel_texture_image *intelImage,
  54                                   enum intel_miptree_create_flags flags)
  55 {
  56    GLuint lastLevel;
  57    int width, height, depth;
  58    unsigned old_width = 0, old_height = 0, old_depth = 0;
  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    if (old_mt) {
  65       old_width = old_mt->surf.logical_level0_px.width;
  66       old_height = old_mt->surf.logical_level0_px.height;
  67       old_depth = old_mt->surf.dim == ISL_SURF_DIM_3D ?
  68                      old_mt->surf.logical_level0_px.depth :
  69                      old_mt->surf.logical_level0_px.array_len;
  70    }
  71
  72    DBG("%s\n", __func__);
  73
  74    /* Figure out image dimensions at start level. */
  75    switch(intelObj->base.Target) {
  76    case GL_TEXTURE_2D_MULTISAMPLE:
  77    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
  78    case GL_TEXTURE_RECTANGLE:
  79    case GL_TEXTURE_EXTERNAL_OES:
  80       assert(level == 0);
  81       break;
  82    case GL_TEXTURE_3D:
  83       depth = old_mt ? get_base_dim(old_depth, depth, level) :
  84                        depth << level;
  85       /* Fall through */
  86    case GL_TEXTURE_2D:
  87    case GL_TEXTURE_2D_ARRAY:
  88    case GL_TEXTURE_CUBE_MAP:
  89    case GL_TEXTURE_CUBE_MAP_ARRAY:
  90       height = old_mt ? get_base_dim(old_height, height, level) :
  91                         height << level;
  92       /* Fall through */
  93    case GL_TEXTURE_1D:
  94    case GL_TEXTURE_1D_ARRAY:
  95       width = old_mt ? get_base_dim(old_width, width, level) :
  96                        width << level;
  97       break;
  98    default:
  99       unreachable("Unexpected target");
 100    }
 101
 102    /* Guess a reasonable value for lastLevel.  This is probably going
 103     * to be wrong fairly often and might mean that we have to look at
 104     * resizable buffers, or require that buffers implement lazy
 105     * pagetable arrangements.
 106     */
 107    if ((intelObj->base.Sampler.MinFilter == GL_NEAREST ||
 108         intelObj->base.Sampler.MinFilter == GL_LINEAR) &&
 109        intelImage->base.Base.Level == 0 &&
 110        !intelObj->base.GenerateMipmap) {
 111       lastLevel = 0;
 112    } else {
 113       lastLevel = _mesa_get_tex_max_num_levels(intelObj->base.Target,
 114                                                width, height, depth) - 1;
 115    }
 116
 117    return intel_miptree_create(brw,
 118                                intelObj->base.Target,
 119                                intelImage->base.Base.TexFormat,
 120                                0,
 121                                lastLevel,
 122                                width,
 123                                height,
 124                                depth,
 125                                MAX2(intelImage->base.Base.NumSamples, 1),
 126                                flags);
 127 }
 128
 129 static bool
 130 intel_texsubimage_blorp(struct brw_context *brw, GLuint dims,
 131                         struct gl_texture_image *tex_image,
 132                         unsigned x, unsigned y, unsigned z,
 133                         unsigned width, unsigned height, unsigned depth,
 134                         GLenum format, GLenum type, const void *pixels,
 135                         const struct gl_pixelstore_attrib *packing)
 136 {
 137    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
 138    const unsigned mt_level = tex_image->Level + tex_image->TexObject->MinLevel;
 139    const unsigned mt_z = tex_image->TexObject->MinLayer + tex_image->Face + z;
 140
 141    /* The blorp path can't understand crazy format hackery */
 142    if (_mesa_base_tex_format(&brw->ctx, tex_image->InternalFormat) !=
 143        _mesa_get_format_base_format(tex_image->TexFormat))
 144       return false;
 145
 146    return brw_blorp_upload_miptree(brw, intel_image->mt, tex_image->TexFormat,
 147                                    mt_level, x, y, mt_z, width, height, depth,
 148                                    tex_image->TexObject->Target, format, type,
 149                                    pixels, packing);
 150 }
 151
 152 /**
 153  * \brief A fast path for glTexImage and glTexSubImage.
 154  *
 155  * This fast path is taken when the texture format is BGRA, RGBA,
 156  * A or L and when the texture memory is X- or Y-tiled.  It uploads
 157  * the texture data by mapping the texture memory without a GTT fence, thus
 158  * acquiring a tiled view of the memory, and then copying sucessive
 159  * spans within each tile.
 160  *
 161  * This is a performance win over the conventional texture upload path because
 162  * it avoids the performance penalty of writing through the write-combine
 163  * buffer. In the conventional texture upload path,
 164  * texstore.c:store_texsubimage(), the texture memory is mapped through a GTT
 165  * fence, thus acquiring a linear view of the memory, then each row in the
 166  * image is memcpy'd. In this fast path, we replace each row's copy with
 167  * a sequence of copies over each linear span in tile.
 168  *
 169  * One use case is Google Chrome's paint rectangles.  Chrome (as
 170  * of version 21) renders each page as a tiling of 256x256 GL_BGRA textures.
 171  * Each page's content is initially uploaded with glTexImage2D and damaged
 172  * regions are updated with glTexSubImage2D. On some workloads, the
 173  * performance gain of this fastpath on Sandybridge is over 5x.
 174  */
 175 static bool
 176 intel_texsubimage_tiled_memcpy(struct gl_context * ctx,
 177                                GLuint dims,
 178                                struct gl_texture_image *texImage,
 179                                GLint xoffset, GLint yoffset, GLint zoffset,
 180                                GLsizei width, GLsizei height, GLsizei depth,
 181                                GLenum format, GLenum type,
 182                                const GLvoid *pixels,
 183                                const struct gl_pixelstore_attrib *packing)
 184 {
 185    struct brw_context *brw = brw_context(ctx);
 186    const struct gen_device_info *devinfo = &brw->screen->devinfo;
 187    struct intel_texture_image *image = intel_texture_image(texImage);
 188    int src_pitch;
 189
 190    /* The miptree's buffer. */
 191    struct brw_bo *bo;
 192
 193    uint32_t cpp;
 194    isl_memcpy_type copy_type;
 195
 196    /* This fastpath is restricted to specific texture types:
 197     * a 2D BGRA, RGBA, L8 or A8 texture. It could be generalized to support
 198     * more types.
 199     *
 200     * FINISHME: The restrictions below on packing alignment and packing row
 201     * length are likely unneeded now because we calculate the source stride
 202     * with _mesa_image_row_stride. However, before removing the restrictions
 203     * we need tests.
 204     */
 205    if (!devinfo->has_llc ||
 206        !(type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) ||
 207        !(texImage->TexObject->Target == GL_TEXTURE_2D ||
 208          texImage->TexObject->Target == GL_TEXTURE_RECTANGLE) ||
 209        pixels == NULL ||
 210        _mesa_is_bufferobj(packing->BufferObj) ||
 211        packing->Alignment > 4 ||
 212        packing->SkipPixels > 0 ||
 213        packing->SkipRows > 0 ||
 214        (packing->RowLength != 0 && packing->RowLength != width) ||
 215        packing->SwapBytes ||
 216        packing->LsbFirst ||
 217        packing->Invert)
 218       return false;
 219
 220    /* Only a simple blit, no scale, bias or other mapping. */
 221    if (ctx->_ImageTransferState)
 222       return false;
 223
 224    copy_type = intel_miptree_get_memcpy_type(texImage->TexFormat, format, type,
 225                                              &cpp);
 226    if (copy_type == ISL_MEMCPY_INVALID)
 227       return false;
 228
 229    /* If this is a nontrivial texture view, let another path handle it instead. */
 230    if (texImage->TexObject->MinLayer)
 231       return false;
 232
 233    if (!image->mt ||
 234        (image->mt->surf.tiling != ISL_TILING_X &&
 235         image->mt->surf.tiling != ISL_TILING_Y0)) {
 236       /* The algorithm is written only for X- or Y-tiled memory. */
 237       return false;
 238    }
 239
 240    /* linear_to_tiled() assumes that if the object is swizzled, it is using
 241     * I915_BIT6_SWIZZLE_9_10 for X and I915_BIT6_SWIZZLE_9 for Y.  This is only
 242     * true on gen5 and above.
 243     *
 244     * The killer on top is that some gen4 have an L-shaped swizzle mode, where
 245     * parts of the memory aren't swizzled at all. Userspace just can't handle
 246     * that.
 247     */
 248    if (devinfo->gen < 5 && brw->has_swizzling)
 249       return false;
 250
 251    int level = texImage->Level + texImage->TexObject->MinLevel;
 252
 253    /* Since we are going to write raw data to the miptree, we need to resolve
 254     * any pending fast color clears before we start.
 255     */
 256    assert(image->mt->surf.logical_level0_px.depth == 1);
 257    assert(image->mt->surf.logical_level0_px.array_len == 1);
 258
 259    intel_miptree_access_raw(brw, image->mt, level, 0, true);
 260
 261    bo = image->mt->bo;
 262
 263    if (brw_batch_references(&brw->batch, bo)) {
 264       perf_debug("Flushing before mapping a referenced bo.\n");
 265       intel_batchbuffer_flush(brw);
 266    }
 267
 268    void *map = brw_bo_map(brw, bo, MAP_WRITE | MAP_RAW);
 269    if (map == NULL) {
 270       DBG("%s: failed to map bo\n", __func__);
 271       return false;
 272    }
 273
 274    src_pitch = _mesa_image_row_stride(packing, width, format, type);
 275
 276    /* We postponed printing this message until having committed to executing
 277     * the function.
 278     */
 279    DBG("%s: level=%d offset=(%d,%d) (w,h)=(%d,%d) format=0x%x type=0x%x "
 280        "mesa_format=0x%x tiling=%d "
 281        "packing=(alignment=%d row_length=%d skip_pixels=%d skip_rows=%d) ",
 282        __func__, texImage->Level, xoffset, yoffset, width, height,
 283        format, type, texImage->TexFormat, image->mt->surf.tiling,
 284        packing->Alignment, packing->RowLength, packing->SkipPixels,
 285        packing->SkipRows);
 286
 287    /* Adjust x and y offset based on miplevel */
 288    unsigned level_x, level_y;
 289    intel_miptree_get_image_offset(image->mt, level, 0, &level_x, &level_y);
 290    xoffset += level_x;
 291    yoffset += level_y;
 292
 293    isl_memcpy_linear_to_tiled(
 294       xoffset * cpp, (xoffset + width) * cpp,
 295       yoffset, yoffset + height,
 296       map,
 297       pixels,
 298       image->mt->surf.row_pitch_B, src_pitch,
 299       brw->has_swizzling,
 300       image->mt->surf.tiling,
 301       copy_type
 302    );
 303
 304    brw_bo_unmap(bo);
 305    return true;
 306 }
 307
 308
 309 static void
 310 intel_upload_tex(struct gl_context * ctx,
 311                  GLuint dims,
 312                  struct gl_texture_image *texImage,
 313                  GLint xoffset, GLint yoffset, GLint zoffset,
 314                  GLsizei width, GLsizei height, GLsizei depth,
 315                  GLenum format, GLenum type,
 316                  const GLvoid * pixels,
 317                  const struct gl_pixelstore_attrib *packing)
 318 {
 319    struct brw_context *brw = brw_context(ctx);
 320    struct intel_mipmap_tree *mt = intel_texture_image(texImage)->mt;
 321    bool ok;
 322
 323    /* Check that there is actually data to store. */
 324    if (pixels == NULL && !_mesa_is_bufferobj(packing->BufferObj))
 325       return;
 326
 327    bool tex_busy = mt && brw_bo_busy(mt->bo);
 328
 329    if (_mesa_is_bufferobj(packing->BufferObj) || tex_busy ||
 330        mt->aux_usage == ISL_AUX_USAGE_CCS_E) {
 331       ok = intel_texsubimage_blorp(brw, dims, texImage,
 332                                    xoffset, yoffset, zoffset,
 333                                    width, height, depth, format, type,
 334                                    pixels, packing);
 335       if (ok)
 336          return;
 337    }
 338
 339    ok = intel_texsubimage_tiled_memcpy(ctx, dims, texImage,
 340                                        xoffset, yoffset, zoffset,
 341                                        width, height, depth,
 342                                        format, type, pixels, packing);
 343    if (ok)
 344      return;
 345
 346    _mesa_store_texsubimage(ctx, dims, texImage,
 347                            xoffset, yoffset, zoffset,
 348                            width, height, depth,
 349                            format, type, pixels, packing);
 350 }
 351
 352
 353 static void
 354 intelTexImage(struct gl_context * ctx,
 355               GLuint dims,
 356               struct gl_texture_image *texImage,
 357               GLenum format, GLenum type, const void *pixels,
 358               const struct gl_pixelstore_attrib *unpack)
 359 {
 360    DBG("%s mesa_format %s target %s format %s type %s level %d %dx%dx%d\n",
 361        __func__, _mesa_get_format_name(texImage->TexFormat),
 362        _mesa_enum_to_string(texImage->TexObject->Target),
 363        _mesa_enum_to_string(format), _mesa_enum_to_string(type),
 364        texImage->Level, texImage->Width, texImage->Height, texImage->Depth);
 365
 366    /* Allocate storage for texture data. */
 367    if (!ctx->Driver.AllocTextureImageBuffer(ctx, texImage)) {
 368       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage%uD", dims);
 369       return;
 370    }
 371
 372    assert(intel_texture_image(texImage)->mt);
 373
 374    intel_upload_tex(ctx, dims, texImage, 0, 0, 0,
 375                     texImage->Width, texImage->Height, texImage->Depth,
 376                     format, type, pixels, unpack);
 377 }
 378
 379
 380 static void
 381 intelTexSubImage(struct gl_context * ctx,
 382                  GLuint dims,
 383                  struct gl_texture_image *texImage,
 384                  GLint xoffset, GLint yoffset, GLint zoffset,
 385                  GLsizei width, GLsizei height, GLsizei depth,
 386                  GLenum format, GLenum type,
 387                  const GLvoid * pixels,
 388                  const struct gl_pixelstore_attrib *packing)
 389 {
 390    DBG("%s mesa_format %s target %s format %s type %s level %d %dx%dx%d\n",
 391        __func__, _mesa_get_format_name(texImage->TexFormat),
 392        _mesa_enum_to_string(texImage->TexObject->Target),
 393        _mesa_enum_to_string(format), _mesa_enum_to_string(type),
 394        texImage->Level, texImage->Width, texImage->Height, texImage->Depth);
 395
 396    intel_upload_tex(ctx, dims, texImage, xoffset, yoffset, zoffset,
 397                     width, height, depth, format, type, pixels, packing);
 398 }
 399
 400
 401 static void
 402 intel_set_texture_image_mt(struct brw_context *brw,
 403                            struct gl_texture_image *image,
 404                            GLenum internal_format,
 405                            mesa_format format,
 406                            struct intel_mipmap_tree *mt)
 407
 408 {
 409    struct gl_texture_object *texobj = image->TexObject;
 410    struct intel_texture_object *intel_texobj = intel_texture_object(texobj);
 411    struct intel_texture_image *intel_image = intel_texture_image(image);
 412
 413    _mesa_init_teximage_fields(&brw->ctx, image,
 414                               mt->surf.logical_level0_px.width,
 415                               mt->surf.logical_level0_px.height, 1,
 416                               0, internal_format, format);
 417
 418    brw->ctx.Driver.FreeTextureImageBuffer(&brw->ctx, image);
 419
 420    intel_texobj->needs_validate = true;
 421    intel_image->base.RowStride = mt->surf.row_pitch_B / mt->cpp;
 422    assert(mt->surf.row_pitch_B % mt->cpp == 0);
 423
 424    intel_miptree_reference(&intel_image->mt, mt);
 425
 426    /* Immediately validate the image to the object. */
 427    intel_miptree_reference(&intel_texobj->mt, mt);
 428 }
 429
 430
 431 void
 432 intelSetTexBuffer2(__DRIcontext *pDRICtx, GLint target,
 433                    GLint texture_format,
 434                    __DRIdrawable *dPriv)
 435 {
 436    struct gl_framebuffer *fb = dPriv->driverPrivate;
 437    struct brw_context *brw = pDRICtx->driverPrivate;
 438    struct gl_context *ctx = &brw->ctx;
 439    struct intel_renderbuffer *rb;
 440    struct gl_texture_object *texObj;
 441    struct gl_texture_image *texImage;
 442    mesa_format texFormat = MESA_FORMAT_NONE;
 443    GLenum internal_format = 0;
 444
 445    texObj = _mesa_get_current_tex_object(ctx, target);
 446
 447    if (!texObj)
 448       return;
 449
 450    if (dPriv->lastStamp != dPriv->dri2.stamp ||
 451        !pDRICtx->driScreenPriv->dri2.useInvalidate)
 452       intel_update_renderbuffers(pDRICtx, dPriv);
 453
 454    rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 455    /* If the miptree isn't set, then intel_update_renderbuffers was unable
 456     * to get the BO for the drawable from the window system.
 457     */
 458    if (!rb || !rb->mt)
 459       return;
 460
 461    /* Neither the EGL and GLX texture_from_pixmap specs say anything about
 462     * sRGB.  They are both from a time where sRGB was considered an extra
 463     * encoding step you did as part of rendering/blending and not a format.
 464     * Even though we have concept of sRGB visuals, X has classically assumed
 465     * that your data is just bits and sRGB rendering is entirely a client-side
 466     * rendering construct.  The assumption is that the result of BindTexImage
 467     * is a texture with a linear format even if it was rendered with sRGB
 468     * encoding enabled.
 469     */
 470    texFormat = _mesa_get_srgb_format_linear(intel_rb_format(rb));
 471
 472    if (rb->mt->cpp == 4) {
 473       /* The extra texture_format parameter indicates whether the alpha
 474        * channel should be respected or ignored.  If we set internal_format to
 475        * GL_RGB, the texture handling code is smart enough to swap the format
 476        * or apply a swizzle if the underlying format is RGBA so we don't need
 477        * to stomp it to RGBX or anything like that.
 478        */
 479       if (texture_format == __DRI_TEXTURE_FORMAT_RGB)
 480          internal_format = GL_RGB;
 481       else
 482          internal_format = GL_RGBA;
 483    } else if (rb->mt->cpp == 2) {
 484       internal_format = GL_RGB;
 485    }
 486
 487    intel_miptree_finish_external(brw, rb->mt);
 488
 489    _mesa_lock_texture(&brw->ctx, texObj);
 490    texImage = _mesa_get_tex_image(ctx, texObj, target, 0);
 491    intel_set_texture_image_mt(brw, texImage, internal_format,
 492                               texFormat, rb->mt);
 493    _mesa_unlock_texture(&brw->ctx, texObj);
 494 }
 495
 496 void
 497 intelReleaseTexBuffer(__DRIcontext *pDRICtx, GLint target,
 498                       __DRIdrawable *dPriv)
 499 {
 500    struct brw_context *brw = pDRICtx->driverPrivate;
 501    struct gl_context *ctx = &brw->ctx;
 502    struct gl_texture_object *tex_obj;
 503    struct intel_texture_object *intel_tex;
 504
 505    tex_obj = _mesa_get_current_tex_object(ctx, target);
 506    if (!tex_obj)
 507       return;
 508
 509    _mesa_lock_texture(&brw->ctx, tex_obj);
 510
 511    intel_tex = intel_texture_object(tex_obj);
 512    if (!intel_tex->mt) {
 513       _mesa_unlock_texture(&brw->ctx, tex_obj);
 514       return;
 515    }
 516
 517    /* The intel_miptree_prepare_external below as well as the finish_external
 518     * above in intelSetTexBuffer2 *should* do nothing.  The BindTexImage call
 519     * from both GLX and EGL has TexImage2D and not TexSubImage2D semantics so
 520     * the texture is not immutable.  This means that the user cannot create a
 521     * texture view of the image with a different format.  Since the only three
 522     * formats available when using BindTexImage are all UNORM, we can never
 523     * end up with an sRGB format being used for texturing and so we shouldn't
 524     * get any format-related resolves when texturing from it.
 525     *
 526     * While very unlikely, it is possible that the client could use the bound
 527     * texture with GL_ARB_image_load_store.  In that case, we'll do a resolve
 528     * but that's not actually a problem as it just means that we lose
 529     * compression on this texture until the next time it's used as a render
 530     * target.
 531     *
 532     * The only other way we could end up with an unexpected aux usage would be
 533     * if we rendered to the image from the same context as we have it bound as
 534     * a texture between BindTexImage and ReleaseTexImage.  However, the spec
 535     * clearly calls this case out and says you shouldn't do that.  It doesn't
 536     * explicitly prevent binding the texture to a framebuffer but it says the
 537     * results of trying to render to it while bound are undefined.
 538     *
 539     * Just to keep everything safe and sane, we do a prepare_external but it
 540     * should be a no-op in almost all cases.  On the off chance that someone
 541     * ever triggers this, we should at least warn them.
 542     */
 543    if (intel_tex->mt->aux_buf &&
 544        intel_miptree_get_aux_state(intel_tex->mt, 0, 0) !=
 545        isl_drm_modifier_get_default_aux_state(intel_tex->mt->drm_modifier)) {
 546       _mesa_warning(ctx, "Aux state changed between BindTexImage and "
 547                          "ReleaseTexImage.  Most likely someone tried to draw "
 548                          "to the pixmap bound in BindTexImage or used it with "
 549                          "image_load_store.");
 550    }
 551
 552    intel_miptree_prepare_external(brw, intel_tex->mt);
 553
 554    _mesa_unlock_texture(&brw->ctx, tex_obj);
 555 }
 556
 557 static GLboolean
 558 intel_bind_renderbuffer_tex_image(struct gl_context *ctx,
 559                                   struct gl_renderbuffer *rb,
 560                                   struct gl_texture_image *image)
 561 {
 562    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 563    struct intel_texture_image *intel_image = intel_texture_image(image);
 564    struct gl_texture_object *texobj = image->TexObject;
 565    struct intel_texture_object *intel_texobj = intel_texture_object(texobj);
 566
 567    /* We can only handle RB allocated with AllocRenderbufferStorage, or
 568     * window-system renderbuffers.
 569     */
 570    assert(!rb->TexImage);
 571
 572    if (!irb->mt)
 573       return false;
 574
 575    _mesa_lock_texture(ctx, texobj);
 576    _mesa_init_teximage_fields(ctx, image,
 577                               rb->Width, rb->Height, 1,
 578                               0, rb->InternalFormat, rb->Format);
 579    image->NumSamples = rb->NumSamples;
 580
 581    intel_miptree_reference(&intel_image->mt, irb->mt);
 582
 583    /* Immediately validate the image to the object. */
 584    intel_miptree_reference(&intel_texobj->mt, intel_image->mt);
 585
 586    intel_texobj->needs_validate = true;
 587    _mesa_unlock_texture(ctx, texobj);
 588
 589    return true;
 590 }
 591
 592 void
 593 intelSetTexBuffer(__DRIcontext *pDRICtx, GLint target, __DRIdrawable *dPriv)
 594 {
 595    /* The old interface didn't have the format argument, so copy our
 596     * implementation's behavior at the time.
 597     */
 598    intelSetTexBuffer2(pDRICtx, target, __DRI_TEXTURE_FORMAT_RGBA, dPriv);
 599 }
 600
 601 static void
 602 intel_image_target_texture_2d(struct gl_context *ctx, GLenum target,
 603                               struct gl_texture_object *texObj,
 604                               struct gl_texture_image *texImage,
 605                               GLeglImageOES image_handle)
 606 {
 607    struct brw_context *brw = brw_context(ctx);
 608    struct intel_mipmap_tree *mt;
 609    __DRIscreen *dri_screen = brw->screen->driScrnPriv;
 610    __DRIimage *image;
 611
 612    image = dri_screen->dri2.image->lookupEGLImage(dri_screen, image_handle,
 613                                                   dri_screen->loaderPrivate);
 614    if (image == NULL)
 615       return;
 616
 617    /* Disallow depth/stencil textures: we don't have a way to pass the
 618     * separate stencil miptree of a GL_DEPTH_STENCIL texture through.
 619     */
 620    if (image->has_depthstencil) {
 621       _mesa_error(ctx, GL_INVALID_OPERATION, __func__);
 622       return;
 623    }
 624
 625    mt = intel_miptree_create_for_dri_image(brw, image, target, image->format,
 626                                            false);
 627    if (mt == NULL)
 628       return;
 629
 630    struct intel_texture_object *intel_texobj = intel_texture_object(texObj);
 631    intel_texobj->planar_format = image->planar_format;
 632
 633    const GLenum internal_format =
 634       image->internal_format != 0 ?
 635       image->internal_format : _mesa_get_format_base_format(mt->format);
 636    intel_set_texture_image_mt(brw, texImage, internal_format, mt->format, mt);
 637    intel_miptree_release(&mt);
 638 }
 639
 640 static bool
 641 intel_gettexsubimage_blorp(struct brw_context *brw,
 642                            struct gl_texture_image *tex_image,
 643                            unsigned x, unsigned y, unsigned z,
 644                            unsigned width, unsigned height, unsigned depth,
 645                            GLenum format, GLenum type, const void *pixels,
 646                            const struct gl_pixelstore_attrib *packing)
 647 {
 648    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
 649    const unsigned mt_level = tex_image->Level + tex_image->TexObject->MinLevel;
 650    const unsigned mt_z = tex_image->TexObject->MinLayer + tex_image->Face + z;
 651
 652    /* The blorp path can't understand crazy format hackery */
 653    if (_mesa_base_tex_format(&brw->ctx, tex_image->InternalFormat) !=
 654        _mesa_get_format_base_format(tex_image->TexFormat))
 655       return false;
 656
 657    return brw_blorp_download_miptree(brw, intel_image->mt,
 658                                      tex_image->TexFormat, SWIZZLE_XYZW,
 659                                      mt_level, x, y, mt_z,
 660                                      width, height, depth,
 661                                      tex_image->TexObject->Target,
 662                                      format, type, false, pixels, packing);
 663 }
 664
 665 /**
 666  * \brief A fast path for glGetTexImage.
 667  *
 668  * \see intel_readpixels_tiled_memcpy()
 669  */
 670 static bool
 671 intel_gettexsubimage_tiled_memcpy(struct gl_context *ctx,
 672                                   struct gl_texture_image *texImage,
 673                                   GLint xoffset, GLint yoffset,
 674                                   GLsizei width, GLsizei height,
 675                                   GLenum format, GLenum type,
 676                                   GLvoid *pixels,
 677                                   const struct gl_pixelstore_attrib *packing)
 678 {
 679    struct brw_context *brw = brw_context(ctx);
 680    const struct gen_device_info *devinfo = &brw->screen->devinfo;
 681    struct intel_texture_image *image = intel_texture_image(texImage);
 682    int dst_pitch;
 683
 684    /* The miptree's buffer. */
 685    struct brw_bo *bo;
 686
 687    uint32_t cpp;
 688    isl_memcpy_type copy_type;
 689
 690    /* This fastpath is restricted to specific texture types:
 691     * a 2D BGRA, RGBA, L8 or A8 texture. It could be generalized to support
 692     * more types.
 693     *
 694     * FINISHME: The restrictions below on packing alignment and packing row
 695     * length are likely unneeded now because we calculate the destination stride
 696     * with _mesa_image_row_stride. However, before removing the restrictions
 697     * we need tests.
 698     */
 699    if (!devinfo->has_llc ||
 700        !(type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) ||
 701        !(texImage->TexObject->Target == GL_TEXTURE_2D ||
 702          texImage->TexObject->Target == GL_TEXTURE_RECTANGLE) ||
 703        pixels == NULL ||
 704        _mesa_is_bufferobj(packing->BufferObj) ||
 705        packing->Alignment > 4 ||
 706        packing->SkipPixels > 0 ||
 707        packing->SkipRows > 0 ||
 708        (packing->RowLength != 0 && packing->RowLength != width) ||
 709        packing->SwapBytes ||
 710        packing->LsbFirst ||
 711        packing->Invert)
 712       return false;
 713
 714    /* We can't handle copying from RGBX or BGRX because the tiled_memcpy
 715     * function doesn't set the last channel to 1. Note this checks BaseFormat
 716     * rather than TexFormat in case the RGBX format is being simulated with an
 717     * RGBA format.
 718     */
 719    if (texImage->_BaseFormat == GL_RGB)
 720       return false;
 721
 722    copy_type = intel_miptree_get_memcpy_type(texImage->TexFormat, format, type,
 723                                              &cpp);
 724    if (copy_type == ISL_MEMCPY_INVALID)
 725       return false;
 726
 727    /* If this is a nontrivial texture view, let another path handle it instead. */
 728    if (texImage->TexObject->MinLayer)
 729       return false;
 730
 731    if (!image->mt ||
 732        (image->mt->surf.tiling != ISL_TILING_X &&
 733         image->mt->surf.tiling != ISL_TILING_Y0)) {
 734       /* The algorithm is written only for X- or Y-tiled memory. */
 735       return false;
 736    }
 737
 738    /* tiled_to_linear() assumes that if the object is swizzled, it is using
 739     * I915_BIT6_SWIZZLE_9_10 for X and I915_BIT6_SWIZZLE_9 for Y.  This is only
 740     * true on gen5 and above.
 741     *
 742     * The killer on top is that some gen4 have an L-shaped swizzle mode, where
 743     * parts of the memory aren't swizzled at all. Userspace just can't handle
 744     * that.
 745     */
 746    if (devinfo->gen < 5 && brw->has_swizzling)
 747       return false;
 748
 749    int level = texImage->Level + texImage->TexObject->MinLevel;
 750
 751    /* Since we are going to write raw data to the miptree, we need to resolve
 752     * any pending fast color clears before we start.
 753     */
 754    assert(image->mt->surf.logical_level0_px.depth == 1);
 755    assert(image->mt->surf.logical_level0_px.array_len == 1);
 756
 757    intel_miptree_access_raw(brw, image->mt, level, 0, true);
 758
 759    bo = image->mt->bo;
 760
 761    if (brw_batch_references(&brw->batch, bo)) {
 762       perf_debug("Flushing before mapping a referenced bo.\n");
 763       intel_batchbuffer_flush(brw);
 764    }
 765
 766    void *map = brw_bo_map(brw, bo, MAP_READ | MAP_RAW);
 767    if (map == NULL) {
 768       DBG("%s: failed to map bo\n", __func__);
 769       return false;
 770    }
 771
 772    dst_pitch = _mesa_image_row_stride(packing, width, format, type);
 773
 774    DBG("%s: level=%d x,y=(%d,%d) (w,h)=(%d,%d) format=0x%x type=0x%x "
 775        "mesa_format=0x%x tiling=%d "
 776        "packing=(alignment=%d row_length=%d skip_pixels=%d skip_rows=%d)\n",
 777        __func__, texImage->Level, xoffset, yoffset, width, height,
 778        format, type, texImage->TexFormat, image->mt->surf.tiling,
 779        packing->Alignment, packing->RowLength, packing->SkipPixels,
 780        packing->SkipRows);
 781
 782    /* Adjust x and y offset based on miplevel */
 783    unsigned level_x, level_y;
 784    intel_miptree_get_image_offset(image->mt, level, 0, &level_x, &level_y);
 785    xoffset += level_x;
 786    yoffset += level_y;
 787
 788    isl_memcpy_tiled_to_linear(
 789       xoffset * cpp, (xoffset + width) * cpp,
 790       yoffset, yoffset + height,
 791       pixels,
 792       map,
 793       dst_pitch, image->mt->surf.row_pitch_B,
 794       brw->has_swizzling,
 795       image->mt->surf.tiling,
 796       copy_type
 797    );
 798
 799    brw_bo_unmap(bo);
 800    return true;
 801 }
 802
 803 static void
 804 intel_get_tex_sub_image(struct gl_context *ctx,
 805                         GLint xoffset, GLint yoffset, GLint zoffset,
 806                         GLsizei width, GLsizei height, GLint depth,
 807                         GLenum format, GLenum type, GLvoid *pixels,
 808                         struct gl_texture_image *texImage)
 809 {
 810    struct brw_context *brw = brw_context(ctx);
 811    bool ok;
 812
 813    DBG("%s\n", __func__);
 814
 815    if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
 816       if (intel_gettexsubimage_blorp(brw, texImage,
 817                                      xoffset, yoffset, zoffset,
 818                                      width, height, depth, format, type,
 819                                      pixels, &ctx->Pack))
 820          return;
 821
 822       perf_debug("%s: fallback to CPU mapping in PBO case\n", __func__);
 823    }
 824
 825    ok = intel_gettexsubimage_tiled_memcpy(ctx, texImage, xoffset, yoffset,
 826                                           width, height,
 827                                           format, type, pixels, &ctx->Pack);
 828
 829    if(ok)
 830       return;
 831
 832    _mesa_meta_GetTexSubImage(ctx, xoffset, yoffset, zoffset,
 833                              width, height, depth,
 834                              format, type, pixels, texImage);
 835
 836    DBG("%s - DONE\n", __func__);
 837 }
 838
 839 static void
 840 flush_astc_denorms(struct gl_context *ctx, GLuint dims,
 841                    struct gl_texture_image *texImage,
 842                    GLint xoffset, GLint yoffset, GLint zoffset,
 843                    GLsizei width, GLsizei height, GLsizei depth)
 844 {
 845    struct compressed_pixelstore store;
 846    _mesa_compute_compressed_pixelstore(dims, texImage->TexFormat,
 847                                        width, height, depth,
 848                                        &ctx->Unpack, &store);
 849
 850    for (int slice = 0; slice < store.CopySlices; slice++) {
 851
 852       /* Map dest texture buffer */
 853       GLubyte *dstMap;
 854       GLint dstRowStride;
 855       ctx->Driver.MapTextureImage(ctx, texImage, slice + zoffset,
 856                                   xoffset, yoffset, width, height,
 857                                   GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
 858                                   &dstMap, &dstRowStride);
 859       if (!dstMap)
 860          continue;
 861
 862       for (int i = 0; i < store.CopyRowsPerSlice; i++) {
 863
 864          /* An ASTC block is stored in little endian mode. The byte that
 865           * contains bits 0..7 is stored at the lower address in memory.
 866           */
 867          struct astc_void_extent {
 868             uint16_t header : 12;
 869             uint16_t dontcare[3];
 870             uint16_t R;
 871             uint16_t G;
 872             uint16_t B;
 873             uint16_t A;
 874          } *blocks = (struct astc_void_extent*) dstMap;
 875
 876          /* Iterate over every copied block in the row */
 877          for (int j = 0; j < store.CopyBytesPerRow / 16; j++) {
 878
 879             /* Check if the header matches that of an LDR void-extent block */
 880             if (blocks[j].header == 0xDFC) {
 881
 882                /* Flush UNORM16 values that would be denormalized */
 883                if (blocks[j].A < 4) blocks[j].A = 0;
 884                if (blocks[j].B < 4) blocks[j].B = 0;
 885                if (blocks[j].G < 4) blocks[j].G = 0;
 886                if (blocks[j].R < 4) blocks[j].R = 0;
 887             }
 888          }
 889
 890          dstMap += dstRowStride;
 891       }
 892
 893       ctx->Driver.UnmapTextureImage(ctx, texImage, slice + zoffset);
 894    }
 895 }
 896
 897
 898 static void
 899 intelCompressedTexSubImage(struct gl_context *ctx, GLuint dims,
 900                         struct gl_texture_image *texImage,
 901                         GLint xoffset, GLint yoffset, GLint zoffset,
 902                         GLsizei width, GLsizei height, GLsizei depth,
 903                         GLenum format,
 904                         GLsizei imageSize, const GLvoid *data)
 905 {
 906    /* Upload the compressed data blocks */
 907    _mesa_store_compressed_texsubimage(ctx, dims, texImage,
 908                                       xoffset, yoffset, zoffset,
 909                                       width, height, depth,
 910                                       format, imageSize, data);
 911
 912    /* Fix up copied ASTC blocks if necessary */
 913    GLenum gl_format = _mesa_compressed_format_to_glenum(ctx,
 914                                                         texImage->TexFormat);
 915    bool is_linear_astc = _mesa_is_astc_format(gl_format) &&
 916                         !_mesa_is_srgb_format(gl_format);
 917    struct brw_context *brw = (struct brw_context*) ctx;
 918    const struct gen_device_info *devinfo = &brw->screen->devinfo;
 919    if (devinfo->gen == 9 && !gen_device_info_is_9lp(devinfo) && is_linear_astc)
 920       flush_astc_denorms(ctx, dims, texImage,
 921                          xoffset, yoffset, zoffset,
 922                          width, height, depth);
 923 }
 924
 925 void
 926 intelInitTextureImageFuncs(struct dd_function_table *functions)
 927 {
 928    functions->TexImage = intelTexImage;
 929    functions->TexSubImage = intelTexSubImage;
 930    functions->CompressedTexSubImage = intelCompressedTexSubImage;
 931    functions->EGLImageTargetTexture2D = intel_image_target_texture_2d;
 932    functions->BindRenderbufferTexImage = intel_bind_renderbuffer_tex_image;
 933    functions->GetTexSubImage = intel_get_tex_sub_image;
 934 }