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 "intel_tiled_memcpy.h"
  27 #include "brw_context.h"
  28 #include "brw_blorp.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                                   enum intel_miptree_create_flags 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) {
  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    }
  72
  73    DBG("%s\n", __func__);
  74
  75    /* Figure out image dimensions at start level. */
  76    switch(intelObj->base.Target) {
  77    case GL_TEXTURE_2D_MULTISAMPLE:
  78    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
  79    case GL_TEXTURE_RECTANGLE:
  80    case GL_TEXTURE_EXTERNAL_OES:
  81       assert(level == 0);
  82       break;
  83    case GL_TEXTURE_3D:
  84       depth = old_mt ? get_base_dim(old_depth, depth, level) :
  85                        depth << level;
  86       /* Fall through */
  87    case GL_TEXTURE_2D:
  88    case GL_TEXTURE_2D_ARRAY:
  89    case GL_TEXTURE_CUBE_MAP:
  90    case GL_TEXTURE_CUBE_MAP_ARRAY:
  91       height = old_mt ? get_base_dim(old_height, height, level) :
  92                         height << level;
  93       /* Fall through */
  94    case GL_TEXTURE_1D:
  95    case GL_TEXTURE_1D_ARRAY:
  96       width = old_mt ? get_base_dim(old_width, width, level) :
  97                        width << level;
  98       break;
  99    default:
 100       unreachable("Unexpected target");
 101    }
 102
 103    /* Guess a reasonable value for lastLevel.  This is probably going
 104     * to be wrong fairly often and might mean that we have to look at
 105     * resizable buffers, or require that buffers implement lazy
 106     * pagetable arrangements.
 107     */
 108    if ((intelObj->base.Sampler.MinFilter == GL_NEAREST ||
 109         intelObj->base.Sampler.MinFilter == GL_LINEAR) &&
 110        intelImage->base.Base.Level == 0 &&
 111        !intelObj->base.GenerateMipmap) {
 112       lastLevel = 0;
 113    } else {
 114       lastLevel = _mesa_get_tex_max_num_levels(intelObj->base.Target,
 115                                                width, height, depth) - 1;
 116    }
 117
 118    return intel_miptree_create(brw,
 119                                intelObj->base.Target,
 120                                intelImage->base.Base.TexFormat,
 121                                0,
 122                                lastLevel,
 123                                width,
 124                                height,
 125                                depth,
 126                                MAX2(intelImage->base.Base.NumSamples, 1),
 127                                flags);
 128 }
 129
 130 static bool
 131 intel_texsubimage_blorp(struct brw_context *brw, GLuint dims,
 132                         struct gl_texture_image *tex_image,
 133                         unsigned x, unsigned y, unsigned z,
 134                         unsigned width, unsigned height, unsigned depth,
 135                         GLenum format, GLenum type, const void *pixels,
 136                         const struct gl_pixelstore_attrib *packing)
 137 {
 138    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
 139    const unsigned mt_level = tex_image->Level + tex_image->TexObject->MinLevel;
 140    const unsigned mt_z = tex_image->TexObject->MinLayer + tex_image->Face + z;
 141
 142    /* The blorp path can't understand crazy format hackery */
 143    if (_mesa_base_tex_format(&brw->ctx, tex_image->InternalFormat) !=
 144        _mesa_get_format_base_format(tex_image->TexFormat))
 145       return false;
 146
 147    return brw_blorp_upload_miptree(brw, intel_image->mt, tex_image->TexFormat,
 148                                    mt_level, x, y, mt_z, width, height, depth,
 149                                    tex_image->TexObject->Target, format, type,
 150                                    pixels, packing);
 151 }
 152
 153 /**
 154  * \brief A fast path for glTexImage and glTexSubImage.
 155  *
 156  * This fast path is taken when the texture format is BGRA, RGBA,
 157  * A or L and when the texture memory is X- or Y-tiled.  It uploads
 158  * the texture data by mapping the texture memory without a GTT fence, thus
 159  * acquiring a tiled view of the memory, and then copying sucessive
 160  * spans within each tile.
 161  *
 162  * This is a performance win over the conventional texture upload path because
 163  * it avoids the performance penalty of writing through the write-combine
 164  * buffer. In the conventional texture upload path,
 165  * texstore.c:store_texsubimage(), the texture memory is mapped through a GTT
 166  * fence, thus acquiring a linear view of the memory, then each row in the
 167  * image is memcpy'd. In this fast path, we replace each row's copy with
 168  * a sequence of copies over each linear span in tile.
 169  *
 170  * One use case is Google Chrome's paint rectangles.  Chrome (as
 171  * of version 21) renders each page as a tiling of 256x256 GL_BGRA textures.
 172  * Each page's content is initially uploaded with glTexImage2D and damaged
 173  * regions are updated with glTexSubImage2D. On some workloads, the
 174  * performance gain of this fastpath on Sandybridge is over 5x.
 175  */
 176 static bool
 177 intel_texsubimage_tiled_memcpy(struct gl_context * ctx,
 178                                GLuint dims,
 179                                struct gl_texture_image *texImage,
 180                                GLint xoffset, GLint yoffset, GLint zoffset,
 181                                GLsizei width, GLsizei height, GLsizei depth,
 182                                GLenum format, GLenum type,
 183                                const GLvoid *pixels,
 184                                const struct gl_pixelstore_attrib *packing)
 185 {
 186    struct brw_context *brw = brw_context(ctx);
 187    const struct gen_device_info *devinfo = &brw->screen->devinfo;
 188    struct intel_texture_image *image = intel_texture_image(texImage);
 189    int src_pitch;
 190
 191    /* The miptree's buffer. */
 192    struct brw_bo *bo;
 193
 194    uint32_t cpp;
 195    mem_copy_fn mem_copy = NULL;
 196
 197    /* This fastpath is restricted to specific texture types:
 198     * a 2D BGRA, RGBA, L8 or A8 texture. It could be generalized to support
 199     * more types.
 200     *
 201     * FINISHME: The restrictions below on packing alignment and packing row
 202     * length are likely unneeded now because we calculate the source stride
 203     * with _mesa_image_row_stride. However, before removing the restrictions
 204     * we need tests.
 205     */
 206    if (!devinfo->has_llc ||
 207        !(type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) ||
 208        !(texImage->TexObject->Target == GL_TEXTURE_2D ||
 209          texImage->TexObject->Target == GL_TEXTURE_RECTANGLE) ||
 210        pixels == NULL ||
 211        _mesa_is_bufferobj(packing->BufferObj) ||
 212        packing->Alignment > 4 ||
 213        packing->SkipPixels > 0 ||
 214        packing->SkipRows > 0 ||
 215        (packing->RowLength != 0 && packing->RowLength != width) ||
 216        packing->SwapBytes ||
 217        packing->LsbFirst ||
 218        packing->Invert)
 219       return false;
 220
 221    /* Only a simple blit, no scale, bias or other mapping. */
 222    if (ctx->_ImageTransferState)
 223       return false;
 224
 225    if (!intel_get_memcpy(texImage->TexFormat, format, type, &mem_copy, &cpp))
 226       return false;
 227
 228    /* If this is a nontrivial texture view, let another path handle it instead. */
 229    if (texImage->TexObject->MinLayer)
 230       return false;
 231
 232    if (!image->mt ||
 233        (image->mt->surf.tiling != ISL_TILING_X &&
 234         image->mt->surf.tiling != ISL_TILING_Y0)) {
 235       /* The algorithm is written only for X- or Y-tiled memory. */
 236       return false;
 237    }
 238
 239    /* linear_to_tiled() assumes that if the object is swizzled, it is using
 240     * I915_BIT6_SWIZZLE_9_10 for X and I915_BIT6_SWIZZLE_9 for Y.  This is only
 241     * true on gen5 and above.
 242     *
 243     * The killer on top is that some gen4 have an L-shaped swizzle mode, where
 244     * parts of the memory aren't swizzled at all. Userspace just can't handle
 245     * that.
 246     */
 247    if (devinfo->gen < 5 && brw->has_swizzling)
 248       return false;
 249
 250    int level = texImage->Level + texImage->TexObject->MinLevel;
 251
 252    /* Since we are going to write raw data to the miptree, we need to resolve
 253     * any pending fast color clears before we start.
 254     */
 255    assert(image->mt->surf.logical_level0_px.depth == 1);
 256    assert(image->mt->surf.logical_level0_px.array_len == 1);
 257
 258    intel_miptree_access_raw(brw, image->mt, level, 0, true);
 259
 260    bo = image->mt->bo;
 261
 262    if (brw_batch_references(&brw->batch, bo)) {
 263       perf_debug("Flushing before mapping a referenced bo.\n");
 264       intel_batchbuffer_flush(brw);
 265    }
 266
 267    void *map = brw_bo_map(brw, bo, MAP_WRITE | MAP_RAW);
 268    if (map == NULL) {
 269       DBG("%s: failed to map bo\n", __func__);
 270       return false;
 271    }
 272
 273    src_pitch = _mesa_image_row_stride(packing, width, format, type);
 274
 275    /* We postponed printing this message until having committed to executing
 276     * the function.
 277     */
 278    DBG("%s: level=%d offset=(%d,%d) (w,h)=(%d,%d) format=0x%x type=0x%x "
 279        "mesa_format=0x%x tiling=%d "
 280        "packing=(alignment=%d row_length=%d skip_pixels=%d skip_rows=%d) ",
 281        __func__, texImage->Level, xoffset, yoffset, width, height,
 282        format, type, texImage->TexFormat, image->mt->surf.tiling,
 283        packing->Alignment, packing->RowLength, packing->SkipPixels,
 284        packing->SkipRows);
 285
 286    /* Adjust x and y offset based on miplevel */
 287    unsigned level_x, level_y;
 288    intel_miptree_get_image_offset(image->mt, level, 0, &level_x, &level_y);
 289    xoffset += level_x;
 290    yoffset += level_y;
 291
 292    linear_to_tiled(
 293       xoffset * cpp, (xoffset + width) * cpp,
 294       yoffset, yoffset + height,
 295       map,
 296       pixels,
 297       image->mt->surf.row_pitch, src_pitch,
 298       brw->has_swizzling,
 299       image->mt->surf.tiling,
 300       mem_copy
 301    );
 302
 303    brw_bo_unmap(bo);
 304    return true;
 305 }
 306
 307
 308 static void
 309 intel_upload_tex(struct gl_context * ctx,
 310                  GLuint dims,
 311                  struct gl_texture_image *texImage,
 312                  GLint xoffset, GLint yoffset, GLint zoffset,
 313                  GLsizei width, GLsizei height, GLsizei depth,
 314                  GLenum format, GLenum type,
 315                  const GLvoid * pixels,
 316                  const struct gl_pixelstore_attrib *packing)
 317 {
 318    struct brw_context *brw = brw_context(ctx);
 319    struct intel_mipmap_tree *mt = intel_texture_image(texImage)->mt;
 320    bool ok;
 321
 322    /* Check that there is actually data to store. */
 323    if (pixels == NULL && !_mesa_is_bufferobj(packing->BufferObj))
 324       return;
 325
 326    bool tex_busy = mt && brw_bo_busy(mt->bo);
 327
 328    if (mt && mt->format == MESA_FORMAT_S_UINT8)
 329       mt->r8stencil_needs_update = true;
 330
 331    if (_mesa_is_bufferobj(packing->BufferObj) || tex_busy ||
 332        mt->aux_usage == ISL_AUX_USAGE_CCS_E) {
 333       ok = intel_texsubimage_blorp(brw, dims, texImage,
 334                                    xoffset, yoffset, zoffset,
 335                                    width, height, depth, format, type,
 336                                    pixels, packing);
 337       if (ok)
 338          return;
 339    }
 340
 341    ok = intel_texsubimage_tiled_memcpy(ctx, dims, texImage,
 342                                        xoffset, yoffset, zoffset,
 343                                        width, height, depth,
 344                                        format, type, pixels, packing);
 345    if (ok)
 346      return;
 347
 348    _mesa_store_texsubimage(ctx, dims, texImage,
 349                            xoffset, yoffset, zoffset,
 350                            width, height, depth,
 351                            format, type, pixels, packing);
 352 }
 353
 354
 355 static void
 356 intelTexImage(struct gl_context * ctx,
 357               GLuint dims,
 358               struct gl_texture_image *texImage,
 359               GLenum format, GLenum type, const void *pixels,
 360               const struct gl_pixelstore_attrib *unpack)
 361 {
 362    DBG("%s mesa_format %s target %s format %s type %s level %d %dx%dx%d\n",
 363        __func__, _mesa_get_format_name(texImage->TexFormat),
 364        _mesa_enum_to_string(texImage->TexObject->Target),
 365        _mesa_enum_to_string(format), _mesa_enum_to_string(type),
 366        texImage->Level, texImage->Width, texImage->Height, texImage->Depth);
 367
 368    /* Allocate storage for texture data. */
 369    if (!ctx->Driver.AllocTextureImageBuffer(ctx, texImage)) {
 370       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage%uD", dims);
 371       return;
 372    }
 373
 374    assert(intel_texture_image(texImage)->mt);
 375
 376    intel_upload_tex(ctx, dims, texImage, 0, 0, 0,
 377                     texImage->Width, texImage->Height, texImage->Depth,
 378                     format, type, pixels, unpack);
 379 }
 380
 381
 382 static void
 383 intelTexSubImage(struct gl_context * ctx,
 384                  GLuint dims,
 385                  struct gl_texture_image *texImage,
 386                  GLint xoffset, GLint yoffset, GLint zoffset,
 387                  GLsizei width, GLsizei height, GLsizei depth,
 388                  GLenum format, GLenum type,
 389                  const GLvoid * pixels,
 390                  const struct gl_pixelstore_attrib *packing)
 391 {
 392    DBG("%s mesa_format %s target %s format %s type %s level %d %dx%dx%d\n",
 393        __func__, _mesa_get_format_name(texImage->TexFormat),
 394        _mesa_enum_to_string(texImage->TexObject->Target),
 395        _mesa_enum_to_string(format), _mesa_enum_to_string(type),
 396        texImage->Level, texImage->Width, texImage->Height, texImage->Depth);
 397
 398    intel_upload_tex(ctx, dims, texImage, xoffset, yoffset, zoffset,
 399                     width, height, depth, format, type, pixels, packing);
 400 }
 401
 402
 403 static void
 404 intel_set_texture_image_mt(struct brw_context *brw,
 405                            struct gl_texture_image *image,
 406                            GLenum internal_format,
 407                            mesa_format format,
 408                            struct intel_mipmap_tree *mt)
 409
 410 {
 411    struct gl_texture_object *texobj = image->TexObject;
 412    struct intel_texture_object *intel_texobj = intel_texture_object(texobj);
 413    struct intel_texture_image *intel_image = intel_texture_image(image);
 414
 415    _mesa_init_teximage_fields(&brw->ctx, image,
 416                               mt->surf.logical_level0_px.width,
 417                               mt->surf.logical_level0_px.height, 1,
 418                               0, internal_format, format);
 419
 420    brw->ctx.Driver.FreeTextureImageBuffer(&brw->ctx, image);
 421
 422    intel_texobj->needs_validate = true;
 423    intel_image->base.RowStride = mt->surf.row_pitch / mt->cpp;
 424    assert(mt->surf.row_pitch % mt->cpp == 0);
 425
 426    intel_miptree_reference(&intel_image->mt, mt);
 427
 428    /* Immediately validate the image to the object. */
 429    intel_miptree_reference(&intel_texobj->mt, mt);
 430 }
 431
 432
 433 void
 434 intelSetTexBuffer2(__DRIcontext *pDRICtx, GLint target,
 435                    GLint texture_format,
 436                    __DRIdrawable *dPriv)
 437 {
 438    struct gl_framebuffer *fb = dPriv->driverPrivate;
 439    struct brw_context *brw = pDRICtx->driverPrivate;
 440    struct gl_context *ctx = &brw->ctx;
 441    struct intel_renderbuffer *rb;
 442    struct gl_texture_object *texObj;
 443    struct gl_texture_image *texImage;
 444    mesa_format texFormat = MESA_FORMAT_NONE;
 445    GLenum internal_format = 0;
 446
 447    texObj = _mesa_get_current_tex_object(ctx, target);
 448
 449    if (!texObj)
 450       return;
 451
 452    if (dPriv->lastStamp != dPriv->dri2.stamp ||
 453        !pDRICtx->driScreenPriv->dri2.useInvalidate)
 454       intel_update_renderbuffers(pDRICtx, dPriv);
 455
 456    rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 457    /* If the miptree isn't set, then intel_update_renderbuffers was unable
 458     * to get the BO for the drawable from the window system.
 459     */
 460    if (!rb || !rb->mt)
 461       return;
 462
 463    /* Neither the EGL and GLX texture_from_pixmap specs say anything about
 464     * sRGB.  They are both from a time where sRGB was considered an extra
 465     * encoding step you did as part of rendering/blending and not a format.
 466     * Even though we have concept of sRGB visuals, X has classically assumed
 467     * that your data is just bits and sRGB rendering is entirely a client-side
 468     * rendering construct.  The assumption is that the result of BindTexImage
 469     * is a texture with a linear format even if it was rendered with sRGB
 470     * encoding enabled.
 471     */
 472    texFormat = _mesa_get_srgb_format_linear(intel_rb_format(rb));
 473
 474    if (rb->mt->cpp == 4) {
 475       /* The extra texture_format parameter indicates whether the alpha
 476        * channel should be respected or ignored.  If we set internal_format to
 477        * GL_RGB, the texture handling code is smart enough to swap the format
 478        * or apply a swizzle if the underlying format is RGBA so we don't need
 479        * to stomp it to RGBX or anything like that.
 480        */
 481       if (texture_format == __DRI_TEXTURE_FORMAT_RGB)
 482          internal_format = GL_RGB;
 483       else
 484          internal_format = GL_RGBA;
 485    } else if (rb->mt->cpp == 2) {
 486       internal_format = GL_RGB;
 487    }
 488
 489    intel_miptree_finish_external(brw, rb->mt);
 490
 491    _mesa_lock_texture(&brw->ctx, texObj);
 492    texImage = _mesa_get_tex_image(ctx, texObj, target, 0);
 493    intel_set_texture_image_mt(brw, texImage, internal_format,
 494                               texFormat, rb->mt);
 495    _mesa_unlock_texture(&brw->ctx, texObj);
 496 }
 497
 498 void
 499 intelReleaseTexBuffer(__DRIcontext *pDRICtx, GLint target,
 500                       __DRIdrawable *dPriv)
 501 {
 502    struct brw_context *brw = pDRICtx->driverPrivate;
 503    struct gl_context *ctx = &brw->ctx;
 504    struct gl_texture_object *tex_obj;
 505    struct intel_texture_object *intel_tex;
 506
 507    tex_obj = _mesa_get_current_tex_object(ctx, target);
 508    if (!tex_obj)
 509       return;
 510
 511    _mesa_lock_texture(&brw->ctx, tex_obj);
 512
 513    intel_tex = intel_texture_object(tex_obj);
 514    if (!intel_tex->mt) {
 515       _mesa_unlock_texture(&brw->ctx, tex_obj);
 516       return;
 517    }
 518
 519    /* The intel_miptree_prepare_external below as well as the finish_external
 520     * above in intelSetTexBuffer2 *should* do nothing.  The BindTexImage call
 521     * from both GLX and EGL has TexImage2D and not TexSubImage2D semantics so
 522     * the texture is not immutable.  This means that the user cannot create a
 523     * texture view of the image with a different format.  Since the only three
 524     * formats available when using BindTexImage are all UNORM, we can never
 525     * end up with an sRGB format being used for texturing and so we shouldn't
 526     * get any format-related resolves when texturing from it.
 527     *
 528     * While very unlikely, it is possible that the client could use the bound
 529     * texture with GL_ARB_image_load_store.  In that case, we'll do a resolve
 530     * but that's not actually a problem as it just means that we lose
 531     * compression on this texture until the next time it's used as a render
 532     * target.
 533     *
 534     * The only other way we could end up with an unexpected aux usage would be
 535     * if we rendered to the image from the same context as we have it bound as
 536     * a texture between BindTexImage and ReleaseTexImage.  However, the spec
 537     * clearly calls this case out and says you shouldn't do that.  It doesn't
 538     * explicitly prevent binding the texture to a framebuffer but it says the
 539     * results of trying to render to it while bound are undefined.
 540     *
 541     * Just to keep everything safe and sane, we do a prepare_external but it
 542     * should be a no-op in almost all cases.  On the off chance that someone
 543     * ever triggers this, we should at least warn them.
 544     */
 545    if (intel_tex->mt->aux_buf &&
 546        intel_miptree_get_aux_state(intel_tex->mt, 0, 0) !=
 547        isl_drm_modifier_get_default_aux_state(intel_tex->mt->drm_modifier)) {
 548       _mesa_warning(ctx, "Aux state changed between BindTexImage and "
 549                          "ReleaseTexImage.  Most likely someone tried to draw "
 550                          "to the pixmap bound in BindTexImage or used it with "
 551                          "image_load_store.");
 552    }
 553
 554    intel_miptree_prepare_external(brw, intel_tex->mt);
 555
 556    _mesa_unlock_texture(&brw->ctx, tex_obj);
 557 }
 558
 559 static GLboolean
 560 intel_bind_renderbuffer_tex_image(struct gl_context *ctx,
 561                                   struct gl_renderbuffer *rb,
 562                                   struct gl_texture_image *image)
 563 {
 564    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 565    struct intel_texture_image *intel_image = intel_texture_image(image);
 566    struct gl_texture_object *texobj = image->TexObject;
 567    struct intel_texture_object *intel_texobj = intel_texture_object(texobj);
 568
 569    /* We can only handle RB allocated with AllocRenderbufferStorage, or
 570     * window-system renderbuffers.
 571     */
 572    assert(!rb->TexImage);
 573
 574    if (!irb->mt)
 575       return false;
 576
 577    _mesa_lock_texture(ctx, texobj);
 578    _mesa_init_teximage_fields(ctx, image,
 579                               rb->Width, rb->Height, 1,
 580                               0, rb->InternalFormat, rb->Format);
 581    image->NumSamples = rb->NumSamples;
 582
 583    intel_miptree_reference(&intel_image->mt, irb->mt);
 584
 585    /* Immediately validate the image to the object. */
 586    intel_miptree_reference(&intel_texobj->mt, intel_image->mt);
 587
 588    intel_texobj->needs_validate = true;
 589    _mesa_unlock_texture(ctx, texobj);
 590
 591    return true;
 592 }
 593
 594 void
 595 intelSetTexBuffer(__DRIcontext *pDRICtx, GLint target, __DRIdrawable *dPriv)
 596 {
 597    /* The old interface didn't have the format argument, so copy our
 598     * implementation's behavior at the time.
 599     */
 600    intelSetTexBuffer2(pDRICtx, target, __DRI_TEXTURE_FORMAT_RGBA, dPriv);
 601 }
 602
 603 static void
 604 intel_image_target_texture_2d(struct gl_context *ctx, GLenum target,
 605                               struct gl_texture_object *texObj,
 606                               struct gl_texture_image *texImage,
 607                               GLeglImageOES image_handle)
 608 {
 609    struct brw_context *brw = brw_context(ctx);
 610    struct intel_mipmap_tree *mt;
 611    __DRIscreen *dri_screen = brw->screen->driScrnPriv;
 612    __DRIimage *image;
 613
 614    image = dri_screen->dri2.image->lookupEGLImage(dri_screen, image_handle,
 615                                                   dri_screen->loaderPrivate);
 616    if (image == NULL)
 617       return;
 618
 619    /* We support external textures only for EGLImages created with
 620     * EGL_EXT_image_dma_buf_import. We may lift that restriction in the future.
 621     */
 622    if (target == GL_TEXTURE_EXTERNAL_OES && !image->dma_buf_imported) {
 623       _mesa_error(ctx, GL_INVALID_OPERATION,
 624             "glEGLImageTargetTexture2DOES(external target is enabled only "
 625                "for images created with EGL_EXT_image_dma_buf_import");
 626       return;
 627    }
 628
 629    /* Disallow depth/stencil textures: we don't have a way to pass the
 630     * separate stencil miptree of a GL_DEPTH_STENCIL texture through.
 631     */
 632    if (image->has_depthstencil) {
 633       _mesa_error(ctx, GL_INVALID_OPERATION, __func__);
 634       return;
 635    }
 636
 637    mt = intel_miptree_create_for_dri_image(brw, image, target, image->format,
 638                                            false);
 639    if (mt == NULL)
 640       return;
 641
 642    struct intel_texture_object *intel_texobj = intel_texture_object(texObj);
 643    intel_texobj->planar_format = image->planar_format;
 644
 645    const GLenum internal_format =
 646       image->internal_format != 0 ?
 647       image->internal_format : _mesa_get_format_base_format(mt->format);
 648    intel_set_texture_image_mt(brw, texImage, internal_format, mt->format, mt);
 649    intel_miptree_release(&mt);
 650 }
 651
 652 static bool
 653 intel_gettexsubimage_blorp(struct brw_context *brw,
 654                            struct gl_texture_image *tex_image,
 655                            unsigned x, unsigned y, unsigned z,
 656                            unsigned width, unsigned height, unsigned depth,
 657                            GLenum format, GLenum type, const void *pixels,
 658                            const struct gl_pixelstore_attrib *packing)
 659 {
 660    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
 661    const unsigned mt_level = tex_image->Level + tex_image->TexObject->MinLevel;
 662    const unsigned mt_z = tex_image->TexObject->MinLayer + tex_image->Face + z;
 663
 664    /* The blorp path can't understand crazy format hackery */
 665    if (_mesa_base_tex_format(&brw->ctx, tex_image->InternalFormat) !=
 666        _mesa_get_format_base_format(tex_image->TexFormat))
 667       return false;
 668
 669    return brw_blorp_download_miptree(brw, intel_image->mt,
 670                                      tex_image->TexFormat, SWIZZLE_XYZW,
 671                                      mt_level, x, y, mt_z,
 672                                      width, height, depth,
 673                                      tex_image->TexObject->Target,
 674                                      format, type, false, pixels, packing);
 675 }
 676
 677 /**
 678  * \brief A fast path for glGetTexImage.
 679  *
 680  * \see intel_readpixels_tiled_memcpy()
 681  */
 682 static bool
 683 intel_gettexsubimage_tiled_memcpy(struct gl_context *ctx,
 684                                   struct gl_texture_image *texImage,
 685                                   GLint xoffset, GLint yoffset,
 686                                   GLsizei width, GLsizei height,
 687                                   GLenum format, GLenum type,
 688                                   GLvoid *pixels,
 689                                   const struct gl_pixelstore_attrib *packing)
 690 {
 691    struct brw_context *brw = brw_context(ctx);
 692    const struct gen_device_info *devinfo = &brw->screen->devinfo;
 693    struct intel_texture_image *image = intel_texture_image(texImage);
 694    int dst_pitch;
 695
 696    /* The miptree's buffer. */
 697    struct brw_bo *bo;
 698
 699    uint32_t cpp;
 700    mem_copy_fn mem_copy = NULL;
 701
 702    /* This fastpath is restricted to specific texture types:
 703     * a 2D BGRA, RGBA, L8 or A8 texture. It could be generalized to support
 704     * more types.
 705     *
 706     * FINISHME: The restrictions below on packing alignment and packing row
 707     * length are likely unneeded now because we calculate the destination stride
 708     * with _mesa_image_row_stride. However, before removing the restrictions
 709     * we need tests.
 710     */
 711    if (!devinfo->has_llc ||
 712        !(type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) ||
 713        !(texImage->TexObject->Target == GL_TEXTURE_2D ||
 714          texImage->TexObject->Target == GL_TEXTURE_RECTANGLE) ||
 715        pixels == NULL ||
 716        _mesa_is_bufferobj(packing->BufferObj) ||
 717        packing->Alignment > 4 ||
 718        packing->SkipPixels > 0 ||
 719        packing->SkipRows > 0 ||
 720        (packing->RowLength != 0 && packing->RowLength != width) ||
 721        packing->SwapBytes ||
 722        packing->LsbFirst ||
 723        packing->Invert)
 724       return false;
 725
 726    /* We can't handle copying from RGBX or BGRX because the tiled_memcpy
 727     * function doesn't set the last channel to 1. Note this checks BaseFormat
 728     * rather than TexFormat in case the RGBX format is being simulated with an
 729     * RGBA format.
 730     */
 731    if (texImage->_BaseFormat == GL_RGB)
 732       return false;
 733
 734    if (!intel_get_memcpy(texImage->TexFormat, format, type, &mem_copy, &cpp))
 735       return false;
 736
 737    /* If this is a nontrivial texture view, let another path handle it instead. */
 738    if (texImage->TexObject->MinLayer)
 739       return false;
 740
 741    if (!image->mt ||
 742        (image->mt->surf.tiling != ISL_TILING_X &&
 743         image->mt->surf.tiling != ISL_TILING_Y0)) {
 744       /* The algorithm is written only for X- or Y-tiled memory. */
 745       return false;
 746    }
 747
 748    /* tiled_to_linear() assumes that if the object is swizzled, it is using
 749     * I915_BIT6_SWIZZLE_9_10 for X and I915_BIT6_SWIZZLE_9 for Y.  This is only
 750     * true on gen5 and above.
 751     *
 752     * The killer on top is that some gen4 have an L-shaped swizzle mode, where
 753     * parts of the memory aren't swizzled at all. Userspace just can't handle
 754     * that.
 755     */
 756    if (devinfo->gen < 5 && brw->has_swizzling)
 757       return false;
 758
 759    int level = texImage->Level + texImage->TexObject->MinLevel;
 760
 761    /* Since we are going to write raw data to the miptree, we need to resolve
 762     * any pending fast color clears before we start.
 763     */
 764    assert(image->mt->surf.logical_level0_px.depth == 1);
 765    assert(image->mt->surf.logical_level0_px.array_len == 1);
 766
 767    intel_miptree_access_raw(brw, image->mt, level, 0, true);
 768
 769    bo = image->mt->bo;
 770
 771    if (brw_batch_references(&brw->batch, bo)) {
 772       perf_debug("Flushing before mapping a referenced bo.\n");
 773       intel_batchbuffer_flush(brw);
 774    }
 775
 776    void *map = brw_bo_map(brw, bo, MAP_READ | MAP_RAW);
 777    if (map == NULL) {
 778       DBG("%s: failed to map bo\n", __func__);
 779       return false;
 780    }
 781
 782    dst_pitch = _mesa_image_row_stride(packing, width, format, type);
 783
 784    DBG("%s: level=%d x,y=(%d,%d) (w,h)=(%d,%d) format=0x%x type=0x%x "
 785        "mesa_format=0x%x tiling=%d "
 786        "packing=(alignment=%d row_length=%d skip_pixels=%d skip_rows=%d)\n",
 787        __func__, texImage->Level, xoffset, yoffset, width, height,
 788        format, type, texImage->TexFormat, image->mt->surf.tiling,
 789        packing->Alignment, packing->RowLength, packing->SkipPixels,
 790        packing->SkipRows);
 791
 792    /* Adjust x and y offset based on miplevel */
 793    unsigned level_x, level_y;
 794    intel_miptree_get_image_offset(image->mt, level, 0, &level_x, &level_y);
 795    xoffset += level_x;
 796    yoffset += level_y;
 797
 798    tiled_to_linear(
 799       xoffset * cpp, (xoffset + width) * cpp,
 800       yoffset, yoffset + height,
 801       pixels,
 802       map,
 803       dst_pitch, image->mt->surf.row_pitch,
 804       brw->has_swizzling,
 805       image->mt->surf.tiling,
 806       mem_copy
 807    );
 808
 809    brw_bo_unmap(bo);
 810    return true;
 811 }
 812
 813 static void
 814 intel_get_tex_sub_image(struct gl_context *ctx,
 815                         GLint xoffset, GLint yoffset, GLint zoffset,
 816                         GLsizei width, GLsizei height, GLint depth,
 817                         GLenum format, GLenum type, GLvoid *pixels,
 818                         struct gl_texture_image *texImage)
 819 {
 820    struct brw_context *brw = brw_context(ctx);
 821    bool ok;
 822
 823    DBG("%s\n", __func__);
 824
 825    if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
 826       if (intel_gettexsubimage_blorp(brw, texImage,
 827                                      xoffset, yoffset, zoffset,
 828                                      width, height, depth, format, type,
 829                                      pixels, &ctx->Pack))
 830          return;
 831
 832       perf_debug("%s: fallback to CPU mapping in PBO case\n", __func__);
 833    }
 834
 835    ok = intel_gettexsubimage_tiled_memcpy(ctx, texImage, xoffset, yoffset,
 836                                           width, height,
 837                                           format, type, pixels, &ctx->Pack);
 838
 839    if(ok)
 840       return;
 841
 842    _mesa_meta_GetTexSubImage(ctx, xoffset, yoffset, zoffset,
 843                              width, height, depth,
 844                              format, type, pixels, texImage);
 845
 846    DBG("%s - DONE\n", __func__);
 847 }
 848
 849 static void
 850 flush_astc_denorms(struct gl_context *ctx, GLuint dims,
 851                    struct gl_texture_image *texImage,
 852                    GLint xoffset, GLint yoffset, GLint zoffset,
 853                    GLsizei width, GLsizei height, GLsizei depth)
 854 {
 855    struct compressed_pixelstore store;
 856    _mesa_compute_compressed_pixelstore(dims, texImage->TexFormat,
 857                                        width, height, depth,
 858                                        &ctx->Unpack, &store);
 859
 860    for (int slice = 0; slice < store.CopySlices; slice++) {
 861
 862       /* Map dest texture buffer */
 863       GLubyte *dstMap;
 864       GLint dstRowStride;
 865       ctx->Driver.MapTextureImage(ctx, texImage, slice + zoffset,
 866                                   xoffset, yoffset, width, height,
 867                                   GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
 868                                   &dstMap, &dstRowStride);
 869       if (!dstMap)
 870          continue;
 871
 872       for (int i = 0; i < store.CopyRowsPerSlice; i++) {
 873
 874          /* An ASTC block is stored in little endian mode. The byte that
 875           * contains bits 0..7 is stored at the lower address in memory.
 876           */
 877          struct astc_void_extent {
 878             uint16_t header : 12;
 879             uint16_t dontcare[3];
 880             uint16_t R;
 881             uint16_t G;
 882             uint16_t B;
 883             uint16_t A;
 884          } *blocks = (struct astc_void_extent*) dstMap;
 885
 886          /* Iterate over every copied block in the row */
 887          for (int j = 0; j < store.CopyBytesPerRow / 16; j++) {
 888
 889             /* Check if the header matches that of an LDR void-extent block */
 890             if (blocks[j].header == 0xDFC) {
 891
 892                /* Flush UNORM16 values that would be denormalized */
 893                if (blocks[j].A < 4) blocks[j].A = 0;
 894                if (blocks[j].B < 4) blocks[j].B = 0;
 895                if (blocks[j].G < 4) blocks[j].G = 0;
 896                if (blocks[j].R < 4) blocks[j].R = 0;
 897             }
 898          }
 899
 900          dstMap += dstRowStride;
 901       }
 902
 903       ctx->Driver.UnmapTextureImage(ctx, texImage, slice + zoffset);
 904    }
 905 }
 906
 907
 908 static void
 909 intelCompressedTexSubImage(struct gl_context *ctx, GLuint dims,
 910                         struct gl_texture_image *texImage,
 911                         GLint xoffset, GLint yoffset, GLint zoffset,
 912                         GLsizei width, GLsizei height, GLsizei depth,
 913                         GLenum format,
 914                         GLsizei imageSize, const GLvoid *data)
 915 {
 916    /* Upload the compressed data blocks */
 917    _mesa_store_compressed_texsubimage(ctx, dims, texImage,
 918                                       xoffset, yoffset, zoffset,
 919                                       width, height, depth,
 920                                       format, imageSize, data);
 921
 922    /* Fix up copied ASTC blocks if necessary */
 923    GLenum gl_format = _mesa_compressed_format_to_glenum(ctx,
 924                                                         texImage->TexFormat);
 925    bool is_linear_astc = _mesa_is_astc_format(gl_format) &&
 926                         !_mesa_is_srgb_format(gl_format);
 927    struct brw_context *brw = (struct brw_context*) ctx;
 928    const struct gen_device_info *devinfo = &brw->screen->devinfo;
 929    if (devinfo->gen == 9 && !gen_device_info_is_9lp(devinfo) && is_linear_astc)
 930       flush_astc_denorms(ctx, dims, texImage,
 931                          xoffset, yoffset, zoffset,
 932                          width, height, depth);
 933 }
 934
 935 void
 936 intelInitTextureImageFuncs(struct dd_function_table *functions)
 937 {
 938    functions->TexImage = intelTexImage;
 939    functions->TexSubImage = intelTexSubImage;
 940    functions->CompressedTexSubImage = intelCompressedTexSubImage;
 941    functions->EGLImageTargetTexture2D = intel_image_target_texture_2d;
 942    functions->BindRenderbufferTexImage = intel_bind_renderbuffer_tex_image;
 943    functions->GetTexSubImage = intel_get_tex_sub_image;
 944 }