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 #include "brw_blorp.h"
  30
  31 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
  32
  33 /* Make sure one doesn't end up shrinking base level zero unnecessarily.
  34  * Determining the base level dimension by shifting higher level dimension
  35  * ends up in off-by-one value in case base level has NPOT size (for example,
  36  * 293 != 146 << 1).
  37  * Choose the original base level dimension when shifted dimensions agree.
  38  * Otherwise assume real resize is intended and use the new shifted value.
  39  */
  40 static unsigned
  41 get_base_dim(unsigned old_base_dim, unsigned new_level_dim, unsigned level)
  42 {
  43    const unsigned old_level_dim = old_base_dim >> level;
  44    const unsigned new_base_dim = new_level_dim << level;
  45
  46    return old_level_dim == new_level_dim ? old_base_dim : new_base_dim;
  47 }
  48
  49 /* Work back from the specified level of the image to the baselevel and create a
  50  * miptree of that size.
  51  */
  52 struct intel_mipmap_tree *
  53 intel_miptree_create_for_teximage(struct brw_context *brw,
  54                                   struct intel_texture_object *intelObj,
  55                                   struct intel_texture_image *intelImage,
  56                                   enum intel_miptree_create_flags flags)
  57 {
  58    GLuint lastLevel;
  59    int width, height, depth;
  60    unsigned old_width = 0, old_height = 0, old_depth = 0;
  61    const struct intel_mipmap_tree *old_mt = intelObj->mt;
  62    const unsigned level = intelImage->base.Base.Level;
  63
  64    intel_get_image_dims(&intelImage->base.Base, &width, &height, &depth);
  65
  66    if (old_mt) {
  67       old_width = old_mt->surf.logical_level0_px.width;
  68       old_height = old_mt->surf.logical_level0_px.height;
  69       old_depth = old_mt->surf.dim == ISL_SURF_DIM_3D ?
  70                      old_mt->surf.logical_level0_px.depth :
  71                      old_mt->surf.logical_level0_px.array_len;
  72    }
  73
  74    DBG("%s\n", __func__);
  75
  76    /* Figure out image dimensions at start level. */
  77    switch(intelObj->base.Target) {
  78    case GL_TEXTURE_2D_MULTISAMPLE:
  79    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
  80    case GL_TEXTURE_RECTANGLE:
  81    case GL_TEXTURE_EXTERNAL_OES:
  82       assert(level == 0);
  83       break;
  84    case GL_TEXTURE_3D:
  85       depth = old_mt ? get_base_dim(old_depth, depth, level) :
  86                        depth << level;
  87       /* Fall through */
  88    case GL_TEXTURE_2D:
  89    case GL_TEXTURE_2D_ARRAY:
  90    case GL_TEXTURE_CUBE_MAP:
  91    case GL_TEXTURE_CUBE_MAP_ARRAY:
  92       height = old_mt ? get_base_dim(old_height, height, level) :
  93                         height << level;
  94       /* Fall through */
  95    case GL_TEXTURE_1D:
  96    case GL_TEXTURE_1D_ARRAY:
  97       width = old_mt ? get_base_dim(old_width, width, level) :
  98                        width << level;
  99       break;
 100    default:
 101       unreachable("Unexpected target");
 102    }
 103
 104    /* Guess a reasonable value for lastLevel.  This is probably going
 105     * to be wrong fairly often and might mean that we have to look at
 106     * resizable buffers, or require that buffers implement lazy
 107     * pagetable arrangements.
 108     */
 109    if ((intelObj->base.Sampler.MinFilter == GL_NEAREST ||
 110         intelObj->base.Sampler.MinFilter == GL_LINEAR) &&
 111        intelImage->base.Base.Level == 0 &&
 112        !intelObj->base.GenerateMipmap) {
 113       lastLevel = 0;
 114    } else {
 115       lastLevel = _mesa_get_tex_max_num_levels(intelObj->base.Target,
 116                                                width, height, depth) - 1;
 117    }
 118
 119    return intel_miptree_create(brw,
 120                                intelObj->base.Target,
 121                                intelImage->base.Base.TexFormat,
 122                                0,
 123                                lastLevel,
 124                                width,
 125                                height,
 126                                depth,
 127                                MAX2(intelImage->base.Base.NumSamples, 1),
 128                                flags);
 129 }
 130
 131 static bool
 132 intel_texsubimage_blorp(struct brw_context *brw, GLuint dims,
 133                         struct gl_texture_image *tex_image,
 134                         unsigned x, unsigned y, unsigned z,
 135                         unsigned width, unsigned height, unsigned depth,
 136                         GLenum format, GLenum type, const void *pixels,
 137                         const struct gl_pixelstore_attrib *packing)
 138 {
 139    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
 140    const unsigned mt_level = tex_image->Level + tex_image->TexObject->MinLevel;
 141    const unsigned mt_z = tex_image->TexObject->MinLayer + tex_image->Face + z;
 142
 143    /* The blorp path can't understand crazy format hackery */
 144    if (_mesa_base_tex_format(&brw->ctx, tex_image->InternalFormat) !=
 145        _mesa_get_format_base_format(tex_image->TexFormat))
 146       return false;
 147
 148    return brw_blorp_upload_miptree(brw, intel_image->mt, tex_image->TexFormat,
 149                                    mt_level, x, y, mt_z, width, height, depth,
 150                                    tex_image->TexObject->Target, format, type,
 151                                    pixels, packing);
 152 }
 153
 154 /**
 155  * \brief A fast path for glTexImage and glTexSubImage.
 156  *
 157  * This fast path is taken when the texture format is BGRA, RGBA,
 158  * A or L and when the texture memory is X- or Y-tiled.  It uploads
 159  * the texture data by mapping the texture memory without a GTT fence, thus
 160  * acquiring a tiled view of the memory, and then copying sucessive
 161  * spans within each tile.
 162  *
 163  * This is a performance win over the conventional texture upload path because
 164  * it avoids the performance penalty of writing through the write-combine
 165  * buffer. In the conventional texture upload path,
 166  * texstore.c:store_texsubimage(), the texture memory is mapped through a GTT
 167  * fence, thus acquiring a linear view of the memory, then each row in the
 168  * image is memcpy'd. In this fast path, we replace each row's copy with
 169  * a sequence of copies over each linear span in tile.
 170  *
 171  * One use case is Google Chrome's paint rectangles.  Chrome (as
 172  * of version 21) renders each page as a tiling of 256x256 GL_BGRA textures.
 173  * Each page's content is initially uploaded with glTexImage2D and damaged
 174  * regions are updated with glTexSubImage2D. On some workloads, the
 175  * performance gain of this fastpath on Sandybridge is over 5x.
 176  */
 177 static bool
 178 intel_texsubimage_tiled_memcpy(struct gl_context * ctx,
 179                                GLuint dims,
 180                                struct gl_texture_image *texImage,
 181                                GLint xoffset, GLint yoffset, GLint zoffset,
 182                                GLsizei width, GLsizei height, GLsizei depth,
 183                                GLenum format, GLenum type,
 184                                const GLvoid *pixels,
 185                                const struct gl_pixelstore_attrib *packing)
 186 {
 187    struct brw_context *brw = brw_context(ctx);
 188    const struct gen_device_info *devinfo = &brw->screen->devinfo;
 189    struct intel_texture_image *image = intel_texture_image(texImage);
 190    int src_pitch;
 191
 192    /* The miptree's buffer. */
 193    struct brw_bo *bo;
 194
 195    uint32_t cpp;
 196    mem_copy_fn mem_copy = NULL;
 197
 198    /* This fastpath is restricted to specific texture types:
 199     * a 2D BGRA, RGBA, L8 or A8 texture. It could be generalized to support
 200     * more types.
 201     *
 202     * FINISHME: The restrictions below on packing alignment and packing row
 203     * length are likely unneeded now because we calculate the source stride
 204     * with _mesa_image_row_stride. However, before removing the restrictions
 205     * we need tests.
 206     */
 207    if (!devinfo->has_llc ||
 208        !(type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) ||
 209        !(texImage->TexObject->Target == GL_TEXTURE_2D ||
 210          texImage->TexObject->Target == GL_TEXTURE_RECTANGLE) ||
 211        pixels == NULL ||
 212        _mesa_is_bufferobj(packing->BufferObj) ||
 213        packing->Alignment > 4 ||
 214        packing->SkipPixels > 0 ||
 215        packing->SkipRows > 0 ||
 216        (packing->RowLength != 0 && packing->RowLength != width) ||
 217        packing->SwapBytes ||
 218        packing->LsbFirst ||
 219        packing->Invert)
 220       return false;
 221
 222    /* Only a simple blit, no scale, bias or other mapping. */
 223    if (ctx->_ImageTransferState)
 224       return false;
 225
 226    if (!intel_get_memcpy(texImage->TexFormat, format, type, &mem_copy, &cpp))
 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    linear_to_tiled(
 294       xoffset * cpp, (xoffset + width) * cpp,
 295       yoffset, yoffset + height,
 296       map,
 297       pixels,
 298       image->mt->surf.row_pitch, src_pitch,
 299       brw->has_swizzling,
 300       image->mt->surf.tiling,
 301       mem_copy
 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 (mt && mt->format == MESA_FORMAT_S_UINT8)
 330       mt->r8stencil_needs_update = true;
 331
 332    if (_mesa_is_bufferobj(packing->BufferObj) || tex_busy ||
 333        mt->aux_usage == ISL_AUX_USAGE_CCS_E) {
 334       ok = intel_texsubimage_blorp(brw, dims, texImage,
 335                                    xoffset, yoffset, zoffset,
 336                                    width, height, depth, format, type,
 337                                    pixels, packing);
 338       if (ok)
 339          return;
 340    }
 341
 342    ok = intel_texsubimage_tiled_memcpy(ctx, dims, texImage,
 343                                        xoffset, yoffset, zoffset,
 344                                        width, height, depth,
 345                                        format, type, pixels, packing);
 346    if (ok)
 347      return;
 348
 349    _mesa_store_texsubimage(ctx, dims, texImage,
 350                            xoffset, yoffset, zoffset,
 351                            width, height, depth,
 352                            format, type, pixels, packing);
 353 }
 354
 355
 356 static void
 357 intelTexImage(struct gl_context * ctx,
 358               GLuint dims,
 359               struct gl_texture_image *texImage,
 360               GLenum format, GLenum type, const void *pixels,
 361               const struct gl_pixelstore_attrib *unpack)
 362 {
 363    DBG("%s mesa_format %s target %s format %s type %s level %d %dx%dx%d\n",
 364        __func__, _mesa_get_format_name(texImage->TexFormat),
 365        _mesa_enum_to_string(texImage->TexObject->Target),
 366        _mesa_enum_to_string(format), _mesa_enum_to_string(type),
 367        texImage->Level, texImage->Width, texImage->Height, texImage->Depth);
 368
 369    /* Allocate storage for texture data. */
 370    if (!ctx->Driver.AllocTextureImageBuffer(ctx, texImage)) {
 371       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage%uD", dims);
 372       return;
 373    }
 374
 375    assert(intel_texture_image(texImage)->mt);
 376
 377    intel_upload_tex(ctx, dims, texImage, 0, 0, 0,
 378                     texImage->Width, texImage->Height, texImage->Depth,
 379                     format, type, pixels, unpack);
 380 }
 381
 382
 383 static void
 384 intelTexSubImage(struct gl_context * ctx,
 385                  GLuint dims,
 386                  struct gl_texture_image *texImage,
 387                  GLint xoffset, GLint yoffset, GLint zoffset,
 388                  GLsizei width, GLsizei height, GLsizei depth,
 389                  GLenum format, GLenum type,
 390                  const GLvoid * pixels,
 391                  const struct gl_pixelstore_attrib *packing)
 392 {
 393    DBG("%s mesa_format %s target %s format %s type %s level %d %dx%dx%d\n",
 394        __func__, _mesa_get_format_name(texImage->TexFormat),
 395        _mesa_enum_to_string(texImage->TexObject->Target),
 396        _mesa_enum_to_string(format), _mesa_enum_to_string(type),
 397        texImage->Level, texImage->Width, texImage->Height, texImage->Depth);
 398
 399    intel_upload_tex(ctx, dims, texImage, xoffset, yoffset, zoffset,
 400                     width, height, depth, format, type, pixels, packing);
 401 }
 402
 403
 404 static void
 405 intel_set_texture_image_mt(struct brw_context *brw,
 406                            struct gl_texture_image *image,
 407                            GLenum internal_format,
 408                            mesa_format format,
 409                            struct intel_mipmap_tree *mt)
 410
 411 {
 412    struct gl_texture_object *texobj = image->TexObject;
 413    struct intel_texture_object *intel_texobj = intel_texture_object(texobj);
 414    struct intel_texture_image *intel_image = intel_texture_image(image);
 415
 416    _mesa_init_teximage_fields(&brw->ctx, image,
 417                               mt->surf.logical_level0_px.width,
 418                               mt->surf.logical_level0_px.height, 1,
 419                               0, internal_format, format);
 420
 421    brw->ctx.Driver.FreeTextureImageBuffer(&brw->ctx, image);
 422
 423    intel_texobj->needs_validate = true;
 424    intel_image->base.RowStride = mt->surf.row_pitch / mt->cpp;
 425    assert(mt->surf.row_pitch % mt->cpp == 0);
 426
 427    intel_miptree_reference(&intel_image->mt, mt);
 428
 429    /* Immediately validate the image to the object. */
 430    intel_miptree_reference(&intel_texobj->mt, mt);
 431 }
 432
 433
 434 void
 435 intelSetTexBuffer2(__DRIcontext *pDRICtx, GLint target,
 436                    GLint texture_format,
 437                    __DRIdrawable *dPriv)
 438 {
 439    struct gl_framebuffer *fb = dPriv->driverPrivate;
 440    struct brw_context *brw = pDRICtx->driverPrivate;
 441    struct gl_context *ctx = &brw->ctx;
 442    struct intel_renderbuffer *rb;
 443    struct gl_texture_object *texObj;
 444    struct gl_texture_image *texImage;
 445    mesa_format texFormat = MESA_FORMAT_NONE;
 446    GLenum internal_format = 0;
 447
 448    texObj = _mesa_get_current_tex_object(ctx, target);
 449
 450    if (!texObj)
 451       return;
 452
 453    if (dPriv->lastStamp != dPriv->dri2.stamp ||
 454        !pDRICtx->driScreenPriv->dri2.useInvalidate)
 455       intel_update_renderbuffers(pDRICtx, dPriv);
 456
 457    rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 458    /* If the miptree isn't set, then intel_update_renderbuffers was unable
 459     * to get the BO for the drawable from the window system.
 460     */
 461    if (!rb || !rb->mt)
 462       return;
 463
 464    /* Neither the EGL and GLX texture_from_pixmap specs say anything about
 465     * sRGB.  They are both from a time where sRGB was considered an extra
 466     * encoding step you did as part of rendering/blending and not a format.
 467     * Even though we have concept of sRGB visuals, X has classically assumed
 468     * that your data is just bits and sRGB rendering is entirely a client-side
 469     * rendering construct.  The assumption is that the result of BindTexImage
 470     * is a texture with a linear format even if it was rendered with sRGB
 471     * encoding enabled.
 472     */
 473    texFormat = _mesa_get_srgb_format_linear(intel_rb_format(rb));
 474
 475    if (rb->mt->cpp == 4) {
 476       /* The extra texture_format parameter indicates whether the alpha
 477        * channel should be respected or ignored.  If we set internal_format to
 478        * GL_RGB, the texture handling code is smart enough to swap the format
 479        * or apply a swizzle if the underlying format is RGBA so we don't need
 480        * to stomp it to RGBX or anything like that.
 481        */
 482       if (texture_format == __DRI_TEXTURE_FORMAT_RGB)
 483          internal_format = GL_RGB;
 484       else
 485          internal_format = GL_RGBA;
 486    } else if (rb->mt->cpp == 2) {
 487       internal_format = GL_RGB;
 488    }
 489
 490    intel_miptree_finish_external(brw, rb->mt);
 491
 492    _mesa_lock_texture(&brw->ctx, texObj);
 493    texImage = _mesa_get_tex_image(ctx, texObj, target, 0);
 494    intel_set_texture_image_mt(brw, texImage, internal_format,
 495                               texFormat, rb->mt);
 496    _mesa_unlock_texture(&brw->ctx, texObj);
 497 }
 498
 499 void
 500 intelReleaseTexBuffer(__DRIcontext *pDRICtx, GLint target,
 501                       __DRIdrawable *dPriv)
 502 {
 503    struct brw_context *brw = pDRICtx->driverPrivate;
 504    struct gl_context *ctx = &brw->ctx;
 505    struct gl_texture_object *tex_obj;
 506    struct intel_texture_object *intel_tex;
 507
 508    tex_obj = _mesa_get_current_tex_object(ctx, target);
 509    if (!tex_obj)
 510       return;
 511
 512    _mesa_lock_texture(&brw->ctx, tex_obj);
 513
 514    intel_tex = intel_texture_object(tex_obj);
 515    if (!intel_tex->mt) {
 516       _mesa_unlock_texture(&brw->ctx, tex_obj);
 517       return;
 518    }
 519
 520    /* The intel_miptree_prepare_external below as well as the finish_external
 521     * above in intelSetTexBuffer2 *should* do nothing.  The BindTexImage call
 522     * from both GLX and EGL has TexImage2D and not TexSubImage2D semantics so
 523     * the texture is not immutable.  This means that the user cannot create a
 524     * texture view of the image with a different format.  Since the only three
 525     * formats available when using BindTexImage are all UNORM, we can never
 526     * end up with an sRGB format being used for texturing and so we shouldn't
 527     * get any format-related resolves when texturing from it.
 528     *
 529     * While very unlikely, it is possible that the client could use the bound
 530     * texture with GL_ARB_image_load_store.  In that case, we'll do a resolve
 531     * but that's not actually a problem as it just means that we lose
 532     * compression on this texture until the next time it's used as a render
 533     * target.
 534     *
 535     * The only other way we could end up with an unexpected aux usage would be
 536     * if we rendered to the image from the same context as we have it bound as
 537     * a texture between BindTexImage and ReleaseTexImage.  However, the spec
 538     * clearly calls this case out and says you shouldn't do that.  It doesn't
 539     * explicitly prevent binding the texture to a framebuffer but it says the
 540     * results of trying to render to it while bound are undefined.
 541     *
 542     * Just to keep everything safe and sane, we do a prepare_external but it
 543     * should be a no-op in almost all cases.  On the off chance that someone
 544     * ever triggers this, we should at least warn them.
 545     */
 546    if (intel_tex->mt->mcs_buf &&
 547        intel_miptree_get_aux_state(intel_tex->mt, 0, 0) !=
 548        isl_drm_modifier_get_default_aux_state(intel_tex->mt->drm_modifier)) {
 549       _mesa_warning(ctx, "Aux state changed between BindTexImage and "
 550                          "ReleaseTexImage.  Most likely someone tried to draw "
 551                          "to the pixmap bound in BindTexImage or used it with "
 552                          "image_load_store.");
 553    }
 554
 555    intel_miptree_prepare_external(brw, intel_tex->mt);
 556
 557    _mesa_unlock_texture(&brw->ctx, tex_obj);
 558 }
 559
 560 static GLboolean
 561 intel_bind_renderbuffer_tex_image(struct gl_context *ctx,
 562                                   struct gl_renderbuffer *rb,
 563                                   struct gl_texture_image *image)
 564 {
 565    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 566    struct intel_texture_image *intel_image = intel_texture_image(image);
 567    struct gl_texture_object *texobj = image->TexObject;
 568    struct intel_texture_object *intel_texobj = intel_texture_object(texobj);
 569
 570    /* We can only handle RB allocated with AllocRenderbufferStorage, or
 571     * window-system renderbuffers.
 572     */
 573    assert(!rb->TexImage);
 574
 575    if (!irb->mt)
 576       return false;
 577
 578    _mesa_lock_texture(ctx, texobj);
 579    _mesa_init_teximage_fields(ctx, image,
 580                               rb->Width, rb->Height, 1,
 581                               0, rb->InternalFormat, rb->Format);
 582    image->NumSamples = rb->NumSamples;
 583
 584    intel_miptree_reference(&intel_image->mt, irb->mt);
 585
 586    /* Immediately validate the image to the object. */
 587    intel_miptree_reference(&intel_texobj->mt, intel_image->mt);
 588
 589    intel_texobj->needs_validate = true;
 590    _mesa_unlock_texture(ctx, texobj);
 591
 592    return true;
 593 }
 594
 595 void
 596 intelSetTexBuffer(__DRIcontext *pDRICtx, GLint target, __DRIdrawable *dPriv)
 597 {
 598    /* The old interface didn't have the format argument, so copy our
 599     * implementation's behavior at the time.
 600     */
 601    intelSetTexBuffer2(pDRICtx, target, __DRI_TEXTURE_FORMAT_RGBA, dPriv);
 602 }
 603
 604 static void
 605 intel_image_target_texture_2d(struct gl_context *ctx, GLenum target,
 606                               struct gl_texture_object *texObj,
 607                               struct gl_texture_image *texImage,
 608                               GLeglImageOES image_handle)
 609 {
 610    struct brw_context *brw = brw_context(ctx);
 611    struct intel_mipmap_tree *mt;
 612    __DRIscreen *dri_screen = brw->screen->driScrnPriv;
 613    __DRIimage *image;
 614
 615    image = dri_screen->dri2.image->lookupEGLImage(dri_screen, image_handle,
 616                                                   dri_screen->loaderPrivate);
 617    if (image == NULL)
 618       return;
 619
 620    /* We support external textures only for EGLImages created with
 621     * EGL_EXT_image_dma_buf_import. We may lift that restriction in the future.
 622     */
 623    if (target == GL_TEXTURE_EXTERNAL_OES && !image->dma_buf_imported) {
 624       _mesa_error(ctx, GL_INVALID_OPERATION,
 625             "glEGLImageTargetTexture2DOES(external target is enabled only "
 626                "for images created with EGL_EXT_image_dma_buf_import");
 627       return;
 628    }
 629
 630    /* Disallow depth/stencil textures: we don't have a way to pass the
 631     * separate stencil miptree of a GL_DEPTH_STENCIL texture through.
 632     */
 633    if (image->has_depthstencil) {
 634       _mesa_error(ctx, GL_INVALID_OPERATION, __func__);
 635       return;
 636    }
 637
 638    mt = intel_miptree_create_for_dri_image(brw, image, target, image->format,
 639                                            false);
 640    if (mt == NULL)
 641       return;
 642
 643    struct intel_texture_object *intel_texobj = intel_texture_object(texObj);
 644    intel_texobj->planar_format = image->planar_format;
 645
 646    const GLenum internal_format =
 647       image->internal_format != 0 ?
 648       image->internal_format : _mesa_get_format_base_format(mt->format);
 649    intel_set_texture_image_mt(brw, texImage, internal_format, mt->format, mt);
 650    intel_miptree_release(&mt);
 651 }
 652
 653 static bool
 654 intel_gettexsubimage_blorp(struct brw_context *brw,
 655                            struct gl_texture_image *tex_image,
 656                            unsigned x, unsigned y, unsigned z,
 657                            unsigned width, unsigned height, unsigned depth,
 658                            GLenum format, GLenum type, const void *pixels,
 659                            const struct gl_pixelstore_attrib *packing)
 660 {
 661    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
 662    const unsigned mt_level = tex_image->Level + tex_image->TexObject->MinLevel;
 663    const unsigned mt_z = tex_image->TexObject->MinLayer + tex_image->Face + z;
 664
 665    /* The blorp path can't understand crazy format hackery */
 666    if (_mesa_base_tex_format(&brw->ctx, tex_image->InternalFormat) !=
 667        _mesa_get_format_base_format(tex_image->TexFormat))
 668       return false;
 669
 670    return brw_blorp_download_miptree(brw, intel_image->mt,
 671                                      tex_image->TexFormat, SWIZZLE_XYZW,
 672                                      mt_level, x, y, mt_z,
 673                                      width, height, depth,
 674                                      tex_image->TexObject->Target,
 675                                      format, type, false, pixels, packing);
 676 }
 677
 678 /**
 679  * \brief A fast path for glGetTexImage.
 680  *
 681  * \see intel_readpixels_tiled_memcpy()
 682  */
 683 static bool
 684 intel_gettexsubimage_tiled_memcpy(struct gl_context *ctx,
 685                                   struct gl_texture_image *texImage,
 686                                   GLint xoffset, GLint yoffset,
 687                                   GLsizei width, GLsizei height,
 688                                   GLenum format, GLenum type,
 689                                   GLvoid *pixels,
 690                                   const struct gl_pixelstore_attrib *packing)
 691 {
 692    struct brw_context *brw = brw_context(ctx);
 693    const struct gen_device_info *devinfo = &brw->screen->devinfo;
 694    struct intel_texture_image *image = intel_texture_image(texImage);
 695    int dst_pitch;
 696
 697    /* The miptree's buffer. */
 698    struct brw_bo *bo;
 699
 700    uint32_t cpp;
 701    mem_copy_fn mem_copy = NULL;
 702
 703    /* This fastpath is restricted to specific texture types:
 704     * a 2D BGRA, RGBA, L8 or A8 texture. It could be generalized to support
 705     * more types.
 706     *
 707     * FINISHME: The restrictions below on packing alignment and packing row
 708     * length are likely unneeded now because we calculate the destination stride
 709     * with _mesa_image_row_stride. However, before removing the restrictions
 710     * we need tests.
 711     */
 712    if (!devinfo->has_llc ||
 713        !(type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) ||
 714        !(texImage->TexObject->Target == GL_TEXTURE_2D ||
 715          texImage->TexObject->Target == GL_TEXTURE_RECTANGLE) ||
 716        pixels == NULL ||
 717        _mesa_is_bufferobj(packing->BufferObj) ||
 718        packing->Alignment > 4 ||
 719        packing->SkipPixels > 0 ||
 720        packing->SkipRows > 0 ||
 721        (packing->RowLength != 0 && packing->RowLength != width) ||
 722        packing->SwapBytes ||
 723        packing->LsbFirst ||
 724        packing->Invert)
 725       return false;
 726
 727    /* We can't handle copying from RGBX or BGRX because the tiled_memcpy
 728     * function doesn't set the last channel to 1. Note this checks BaseFormat
 729     * rather than TexFormat in case the RGBX format is being simulated with an
 730     * RGBA format.
 731     */
 732    if (texImage->_BaseFormat == GL_RGB)
 733       return false;
 734
 735    if (!intel_get_memcpy(texImage->TexFormat, format, type, &mem_copy, &cpp))
 736       return false;
 737
 738    /* If this is a nontrivial texture view, let another path handle it instead. */
 739    if (texImage->TexObject->MinLayer)
 740       return false;
 741
 742    if (!image->mt ||
 743        (image->mt->surf.tiling != ISL_TILING_X &&
 744         image->mt->surf.tiling != ISL_TILING_Y0)) {
 745       /* The algorithm is written only for X- or Y-tiled memory. */
 746       return false;
 747    }
 748
 749    /* tiled_to_linear() assumes that if the object is swizzled, it is using
 750     * I915_BIT6_SWIZZLE_9_10 for X and I915_BIT6_SWIZZLE_9 for Y.  This is only
 751     * true on gen5 and above.
 752     *
 753     * The killer on top is that some gen4 have an L-shaped swizzle mode, where
 754     * parts of the memory aren't swizzled at all. Userspace just can't handle
 755     * that.
 756     */
 757    if (devinfo->gen < 5 && brw->has_swizzling)
 758       return false;
 759
 760    int level = texImage->Level + texImage->TexObject->MinLevel;
 761
 762    /* Since we are going to write raw data to the miptree, we need to resolve
 763     * any pending fast color clears before we start.
 764     */
 765    assert(image->mt->surf.logical_level0_px.depth == 1);
 766    assert(image->mt->surf.logical_level0_px.array_len == 1);
 767
 768    intel_miptree_access_raw(brw, image->mt, level, 0, true);
 769
 770    bo = image->mt->bo;
 771
 772    if (brw_batch_references(&brw->batch, bo)) {
 773       perf_debug("Flushing before mapping a referenced bo.\n");
 774       intel_batchbuffer_flush(brw);
 775    }
 776
 777    void *map = brw_bo_map(brw, bo, MAP_READ | MAP_RAW);
 778    if (map == NULL) {
 779       DBG("%s: failed to map bo\n", __func__);
 780       return false;
 781    }
 782
 783    dst_pitch = _mesa_image_row_stride(packing, width, format, type);
 784
 785    DBG("%s: level=%d x,y=(%d,%d) (w,h)=(%d,%d) format=0x%x type=0x%x "
 786        "mesa_format=0x%x tiling=%d "
 787        "packing=(alignment=%d row_length=%d skip_pixels=%d skip_rows=%d)\n",
 788        __func__, texImage->Level, xoffset, yoffset, width, height,
 789        format, type, texImage->TexFormat, image->mt->surf.tiling,
 790        packing->Alignment, packing->RowLength, packing->SkipPixels,
 791        packing->SkipRows);
 792
 793    /* Adjust x and y offset based on miplevel */
 794    unsigned level_x, level_y;
 795    intel_miptree_get_image_offset(image->mt, level, 0, &level_x, &level_y);
 796    xoffset += level_x;
 797    yoffset += level_y;
 798
 799    tiled_to_linear(
 800       xoffset * cpp, (xoffset + width) * cpp,
 801       yoffset, yoffset + height,
 802       pixels,
 803       map,
 804       dst_pitch, image->mt->surf.row_pitch,
 805       brw->has_swizzling,
 806       image->mt->surf.tiling,
 807       mem_copy
 808    );
 809
 810    brw_bo_unmap(bo);
 811    return true;
 812 }
 813
 814 static void
 815 intel_get_tex_sub_image(struct gl_context *ctx,
 816                         GLint xoffset, GLint yoffset, GLint zoffset,
 817                         GLsizei width, GLsizei height, GLint depth,
 818                         GLenum format, GLenum type, GLvoid *pixels,
 819                         struct gl_texture_image *texImage)
 820 {
 821    struct brw_context *brw = brw_context(ctx);
 822    bool ok;
 823
 824    DBG("%s\n", __func__);
 825
 826    if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
 827       if (intel_gettexsubimage_blorp(brw, texImage,
 828                                      xoffset, yoffset, zoffset,
 829                                      width, height, depth, format, type,
 830                                      pixels, &ctx->Pack))
 831          return;
 832
 833       perf_debug("%s: fallback to CPU mapping in PBO case\n", __func__);
 834    }
 835
 836    ok = intel_gettexsubimage_tiled_memcpy(ctx, texImage, xoffset, yoffset,
 837                                           width, height,
 838                                           format, type, pixels, &ctx->Pack);
 839
 840    if(ok)
 841       return;
 842
 843    _mesa_meta_GetTexSubImage(ctx, xoffset, yoffset, zoffset,
 844                              width, height, depth,
 845                              format, type, pixels, texImage);
 846
 847    DBG("%s - DONE\n", __func__);
 848 }
 849
 850 static void
 851 flush_astc_denorms(struct gl_context *ctx, GLuint dims,
 852                    struct gl_texture_image *texImage,
 853                    GLint xoffset, GLint yoffset, GLint zoffset,
 854                    GLsizei width, GLsizei height, GLsizei depth)
 855 {
 856    struct compressed_pixelstore store;
 857    _mesa_compute_compressed_pixelstore(dims, texImage->TexFormat,
 858                                        width, height, depth,
 859                                        &ctx->Unpack, &store);
 860
 861    for (int slice = 0; slice < store.CopySlices; slice++) {
 862
 863       /* Map dest texture buffer */
 864       GLubyte *dstMap;
 865       GLint dstRowStride;
 866       ctx->Driver.MapTextureImage(ctx, texImage, slice + zoffset,
 867                                   xoffset, yoffset, width, height,
 868                                   GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
 869                                   &dstMap, &dstRowStride);
 870       if (!dstMap)
 871          continue;
 872
 873       for (int i = 0; i < store.CopyRowsPerSlice; i++) {
 874
 875          /* An ASTC block is stored in little endian mode. The byte that
 876           * contains bits 0..7 is stored at the lower address in memory.
 877           */
 878          struct astc_void_extent {
 879             uint16_t header : 12;
 880             uint16_t dontcare[3];
 881             uint16_t R;
 882             uint16_t G;
 883             uint16_t B;
 884             uint16_t A;
 885          } *blocks = (struct astc_void_extent*) dstMap;
 886
 887          /* Iterate over every copied block in the row */
 888          for (int j = 0; j < store.CopyBytesPerRow / 16; j++) {
 889
 890             /* Check if the header matches that of an LDR void-extent block */
 891             if (blocks[j].header == 0xDFC) {
 892
 893                /* Flush UNORM16 values that would be denormalized */
 894                if (blocks[j].A < 4) blocks[j].A = 0;
 895                if (blocks[j].B < 4) blocks[j].B = 0;
 896                if (blocks[j].G < 4) blocks[j].G = 0;
 897                if (blocks[j].R < 4) blocks[j].R = 0;
 898             }
 899          }
 900
 901          dstMap += dstRowStride;
 902       }
 903
 904       ctx->Driver.UnmapTextureImage(ctx, texImage, slice + zoffset);
 905    }
 906 }
 907
 908
 909 static void
 910 intelCompressedTexSubImage(struct gl_context *ctx, GLuint dims,
 911                         struct gl_texture_image *texImage,
 912                         GLint xoffset, GLint yoffset, GLint zoffset,
 913                         GLsizei width, GLsizei height, GLsizei depth,
 914                         GLenum format,
 915                         GLsizei imageSize, const GLvoid *data)
 916 {
 917    /* Upload the compressed data blocks */
 918    _mesa_store_compressed_texsubimage(ctx, dims, texImage,
 919                                       xoffset, yoffset, zoffset,
 920                                       width, height, depth,
 921                                       format, imageSize, data);
 922
 923    /* Fix up copied ASTC blocks if necessary */
 924    GLenum gl_format = _mesa_compressed_format_to_glenum(ctx,
 925                                                         texImage->TexFormat);
 926    bool is_linear_astc = _mesa_is_astc_format(gl_format) &&
 927                         !_mesa_is_srgb_format(gl_format);
 928    struct brw_context *brw = (struct brw_context*) ctx;
 929    const struct gen_device_info *devinfo = &brw->screen->devinfo;
 930    if (devinfo->gen == 9 && is_linear_astc)
 931       flush_astc_denorms(ctx, dims, texImage,
 932                          xoffset, yoffset, zoffset,
 933                          width, height, depth);
 934 }
 935
 936 void
 937 intelInitTextureImageFuncs(struct dd_function_table *functions)
 938 {
 939    functions->TexImage = intelTexImage;
 940    functions->TexSubImage = intelTexSubImage;
 941    functions->CompressedTexSubImage = intelCompressedTexSubImage;
 942    functions->EGLImageTargetTexture2D = intel_image_target_texture_2d;
 943    functions->BindRenderbufferTexImage = intel_bind_renderbuffer_tex_image;
 944    functions->GetTexSubImage = intel_get_tex_sub_image;
 945 }