/** * Called via ctx->Driver.GenerateMipmap(). */ void st_generate_mipmap(struct gl_context *ctx, GLenum target, struct gl_texture_object *texObj) { struct st_context *st = st_context(ctx); struct st_texture_object *stObj = st_texture_object(texObj); struct pipe_resource *pt = st_get_texobj_resource(texObj); const uint baseLevel = texObj->BaseLevel; enum pipe_format format; uint lastLevel, first_layer, last_layer; if (!pt) return; /* not sure if this ultimately actually should work, but we're not supporting multisampled textures yet. */ assert(pt->nr_samples < 2); /* find expected last mipmap level to generate*/ lastLevel = compute_num_levels(ctx, texObj, target) - 1; if (lastLevel == 0) return; st_flush_bitmap_cache(st); st_invalidate_readpix_cache(st); /* The texture isn't in a "complete" state yet so set the expected * lastLevel here, since it won't get done in st_finalize_texture(). */ stObj->lastLevel = lastLevel; if (!texObj->Immutable) { const GLboolean genSave = texObj->GenerateMipmap; /* Temporarily set GenerateMipmap to true so that allocate_full_mipmap() * makes the right decision about full mipmap allocation. */ texObj->GenerateMipmap = GL_TRUE; _mesa_prepare_mipmap_levels(ctx, texObj, baseLevel, lastLevel); texObj->GenerateMipmap = genSave; /* At this point, memory for all the texture levels has been * allocated. However, the base level image may be in one resource * while the subsequent/smaller levels may be in another resource. * Finalizing the texture will copy the base images from the former * resource to the latter. * * After this, we'll have all mipmap levels in one resource. */ st_finalize_texture(ctx, st->pipe, texObj); } pt = stObj->pt; if (!pt) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "mipmap generation"); return; } assert(pt->last_level >= lastLevel); if (pt->target == PIPE_TEXTURE_CUBE) { first_layer = last_layer = _mesa_tex_target_to_face(target); } else { first_layer = 0; last_layer = util_max_layer(pt, baseLevel); } if (stObj->surface_based) format = stObj->surface_format; else format = pt->format; /* First see if the driver supports hardware mipmap generation, * if not then generate the mipmap by rendering/texturing. * If that fails, use the software fallback. */ if (!st->pipe->screen->get_param(st->pipe->screen, PIPE_CAP_GENERATE_MIPMAP) || !st->pipe->generate_mipmap(st->pipe, pt, format, baseLevel, lastLevel, first_layer, last_layer)) { if (!util_gen_mipmap(st->pipe, pt, format, baseLevel, lastLevel, first_layer, last_layer, PIPE_TEX_FILTER_LINEAR)) { _mesa_generate_mipmap(ctx, target, texObj); } } }
/** * The GenerateMipmap() driver hook. */ void brw_generate_mipmap(struct gl_context *ctx, GLenum target, struct gl_texture_object *tex_obj) { struct brw_context *brw = brw_context(ctx); struct gen_device_info *devinfo = &brw->screen->devinfo; struct intel_texture_object *intel_obj = intel_texture_object(tex_obj); const unsigned base_level = tex_obj->BaseLevel; unsigned last_level, first_layer, last_layer; /* Blorp doesn't handle combined depth/stencil surfaces on Gen4-5 yet. */ if (devinfo->gen <= 5 && (tex_obj->Image[0][base_level]->_BaseFormat == GL_DEPTH_COMPONENT || tex_obj->Image[0][base_level]->_BaseFormat == GL_DEPTH_STENCIL)) { _mesa_meta_GenerateMipmap(ctx, target, tex_obj); return; } /* find expected last mipmap level to generate */ last_level = _mesa_compute_num_levels(ctx, tex_obj, target) - 1; if (last_level == 0) return; /* The texture isn't in a "complete" state yet so set the expected * last_level here; we're not going through normal texture validation. */ intel_obj->_MaxLevel = last_level; if (!tex_obj->Immutable) { _mesa_prepare_mipmap_levels(ctx, tex_obj, base_level, last_level); /* At this point, memory for all the texture levels has been * allocated. However, the base level image may be in one resource * while the subsequent/smaller levels may be in another resource. * Finalizing the texture will copy the base images from the former * resource to the latter. * * After this, we'll have all mipmap levels in one resource. */ intel_finalize_mipmap_tree(brw, tex_obj); } struct intel_mipmap_tree *mt = intel_obj->mt; if (!mt) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "mipmap generation"); return; } const mesa_format format = intel_obj->_Format; /* Fall back to the CPU for non-renderable cases. * * TODO: 3D textures require blending data from multiple slices, * which means we need custom shaders. For now, fall back. */ if (!brw->mesa_format_supports_render[format] || target == GL_TEXTURE_3D) { _mesa_generate_mipmap(ctx, target, tex_obj); return; } const struct isl_extent4d *base_size = &mt->surf.logical_level0_px; if (mt->target == GL_TEXTURE_CUBE_MAP) { first_layer = _mesa_tex_target_to_face(target); last_layer = first_layer; } else { first_layer = 0; last_layer = base_size->array_len - 1; } /* The GL_EXT_texture_sRGB_decode extension's issues section says: * * "10) How is mipmap generation of sRGB textures affected by the * TEXTURE_SRGB_DECODE_EXT parameter? * * RESOLVED: When the TEXTURE_SRGB_DECODE parameter is DECODE_EXT * for an sRGB texture, mipmap generation should decode sRGB texels * to a linear RGB color space, perform downsampling, then encode * back to an sRGB color space. (Issue 24 in the EXT_texture_sRGB * specification provides a rationale for why.) When the parameter * is SKIP_DECODE_EXT instead, mipmap generation skips the encode * and decode steps during mipmap generation. By skipping the * encode and decode steps, sRGB mipmap generation should match * the mipmap generation for a non-sRGB texture." */ bool do_srgb = tex_obj->Sampler.sRGBDecode == GL_DECODE_EXT; for (unsigned dst_level = base_level + 1; dst_level <= last_level; dst_level++) { const unsigned src_level = dst_level - 1; for (unsigned layer = first_layer; layer <= last_layer; layer++) { brw_blorp_blit_miptrees(brw, mt, src_level, layer, format, SWIZZLE_XYZW, mt, dst_level, layer, format, 0, 0, minify(base_size->width, src_level), minify(base_size->height, src_level), 0, 0, minify(base_size->width, dst_level), minify(base_size->height, dst_level), GL_LINEAR, false, false, do_srgb, do_srgb); } } }
/** * Called via ctx->Driver.GenerateMipmap() * Note: We don't yet support 3D textures, or texture borders. */ void _mesa_meta_GenerateMipmap(struct gl_context *ctx, GLenum target, struct gl_texture_object *texObj) { struct gen_mipmap_state *mipmap = &ctx->Meta->Mipmap; struct vertex verts[4]; const GLuint baseLevel = texObj->BaseLevel; const GLuint maxLevel = texObj->MaxLevel; const GLint maxLevelSave = texObj->MaxLevel; const GLboolean genMipmapSave = texObj->GenerateMipmap; const GLboolean use_glsl_version = ctx->Extensions.ARB_vertex_shader && ctx->Extensions.ARB_fragment_shader; GLenum faceTarget; GLuint dstLevel; struct gl_sampler_object *samp_obj_save = NULL; GLint swizzle[4]; GLboolean swizzleSaved = GL_FALSE; /* GLint so the compiler won't complain about type signedness mismatch in * the calls to _mesa_texture_parameteriv below. */ static const GLint always_false = GL_FALSE; static const GLint always_true = GL_TRUE; if (fallback_required(ctx, target, texObj)) { _mesa_generate_mipmap(ctx, target, texObj); return; } if (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X && target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z) { faceTarget = target; target = GL_TEXTURE_CUBE_MAP; } else { faceTarget = target; } _mesa_meta_begin(ctx, MESA_META_ALL & ~MESA_META_DRAW_BUFFERS); _mesa_ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); /* Choose between glsl version and fixed function version of * GenerateMipmap function. */ if (use_glsl_version) { _mesa_meta_setup_vertex_objects(ctx, &mipmap->VAO, &mipmap->buf_obj, true, 2, 4, 0); _mesa_meta_setup_blit_shader(ctx, target, false, &mipmap->shaders); } else { _mesa_meta_setup_ff_tnl_for_blit(ctx, &mipmap->VAO, &mipmap->buf_obj, 3); _mesa_set_enable(ctx, target, GL_TRUE); } _mesa_reference_sampler_object(ctx, &samp_obj_save, ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler); /* We may have been called from glGenerateTextureMipmap with CurrentUnit * still set to 0, so we don't know when we can skip binding the texture. * Assume that _mesa_BindTexture will be fast if we're rebinding the same * texture. */ _mesa_BindTexture(target, texObj->Name); if (mipmap->samp_obj == NULL) { mipmap->samp_obj = ctx->Driver.NewSamplerObject(ctx, 0xDEADBEEF); if (mipmap->samp_obj == NULL) { /* This is a bit lazy. Flag out of memory, and then don't bother to * clean up. Once out of memory is flagged, the only realistic next * move is to destroy the context. That will trigger all the right * clean up. */ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGenerateMipmap"); return; } _mesa_set_sampler_filters(ctx, mipmap->samp_obj, GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR); _mesa_set_sampler_wrap(ctx, mipmap->samp_obj, GL_CLAMP_TO_EDGE, GL_CLAMP_TO_EDGE, GL_CLAMP_TO_EDGE); /* We don't want to encode or decode sRGB values; treat them as linear. */ _mesa_set_sampler_srgb_decode(ctx, mipmap->samp_obj, GL_SKIP_DECODE_EXT); } _mesa_bind_sampler(ctx, ctx->Texture.CurrentUnit, mipmap->samp_obj); assert(mipmap->fb != NULL); _mesa_bind_framebuffers(ctx, mipmap->fb, mipmap->fb); _mesa_texture_parameteriv(ctx, texObj, GL_GENERATE_MIPMAP, &always_false, false); if (texObj->_Swizzle != SWIZZLE_NOOP) { static const GLint swizzleNoop[4] = { GL_RED, GL_GREEN, GL_BLUE, GL_ALPHA }; memcpy(swizzle, texObj->Swizzle, sizeof(swizzle)); swizzleSaved = GL_TRUE; _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_SWIZZLE_RGBA, swizzleNoop, false); } /* Silence valgrind warnings about reading uninitialized stack. */ memset(verts, 0, sizeof(verts)); /* setup vertex positions */ verts[0].x = -1.0F; verts[0].y = -1.0F; verts[1].x = 1.0F; verts[1].y = -1.0F; verts[2].x = 1.0F; verts[2].y = 1.0F; verts[3].x = -1.0F; verts[3].y = 1.0F; /* texture is already locked, unlock now */ _mesa_unlock_texture(ctx, texObj); _mesa_prepare_mipmap_levels(ctx, texObj, baseLevel, maxLevel); for (dstLevel = baseLevel + 1; dstLevel <= maxLevel; dstLevel++) { const struct gl_texture_image *srcImage; struct gl_texture_image *dstImage; const GLuint srcLevel = dstLevel - 1; GLuint layer; GLsizei srcWidth, srcHeight, srcDepth; GLsizei dstWidth, dstHeight, dstDepth; srcImage = _mesa_select_tex_image(texObj, faceTarget, srcLevel); assert(srcImage->Border == 0); /* src size */ srcWidth = srcImage->Width; if (target == GL_TEXTURE_1D_ARRAY) { srcHeight = 1; srcDepth = srcImage->Height; } else { srcHeight = srcImage->Height; srcDepth = srcImage->Depth; } /* new dst size */ dstWidth = minify(srcWidth, 1); dstHeight = minify(srcHeight, 1); dstDepth = target == GL_TEXTURE_3D ? minify(srcDepth, 1) : srcDepth; if (dstWidth == srcWidth && dstHeight == srcHeight && dstDepth == srcDepth) { /* all done */ break; } /* Allocate storage for the destination mipmap image(s) */ /* Set MaxLevel large enough to hold the new level when we allocate it */ _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_MAX_LEVEL, (GLint *) &dstLevel, false); dstImage = _mesa_select_tex_image(texObj, faceTarget, dstLevel); /* All done. We either ran out of memory or we would go beyond the last * valid level of an immutable texture if we continued. */ if (dstImage == NULL) break; /* limit minification to src level */ _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_MAX_LEVEL, (GLint *) &srcLevel, false); /* setup viewport */ _mesa_set_viewport(ctx, 0, 0, 0, dstWidth, dstHeight); _mesa_DrawBuffer(GL_COLOR_ATTACHMENT0); for (layer = 0; layer < dstDepth; ++layer) { /* Setup texture coordinates */ _mesa_meta_setup_texture_coords(faceTarget, layer, 0, 0, /* xoffset, yoffset */ srcWidth, srcHeight, /* img size */ srcWidth, srcHeight, srcDepth, verts[0].tex, verts[1].tex, verts[2].tex, verts[3].tex); /* upload vertex data */ _mesa_buffer_data(ctx, mipmap->buf_obj, GL_NONE, sizeof(verts), verts, GL_DYNAMIC_DRAW, __func__); _mesa_meta_framebuffer_texture_image(ctx, ctx->DrawBuffer, GL_COLOR_ATTACHMENT0, dstImage, layer); /* sanity check */ if (_mesa_check_framebuffer_status(ctx, ctx->DrawBuffer) != GL_FRAMEBUFFER_COMPLETE) { _mesa_problem(ctx, "Unexpected incomplete framebuffer in " "_mesa_meta_GenerateMipmap()"); break; } assert(dstWidth == ctx->DrawBuffer->Width); if (target == GL_TEXTURE_1D_ARRAY) { assert(dstHeight == 1); } else { assert(dstHeight == ctx->DrawBuffer->Height); } _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4); } } _mesa_lock_texture(ctx, texObj); /* relock */ _mesa_bind_sampler(ctx, ctx->Texture.CurrentUnit, samp_obj_save); _mesa_reference_sampler_object(ctx, &samp_obj_save, NULL); _mesa_meta_end(ctx); _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_MAX_LEVEL, &maxLevelSave, false); if (genMipmapSave) _mesa_texture_parameteriv(ctx, texObj, GL_GENERATE_MIPMAP, &always_true, false); if (swizzleSaved) _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_SWIZZLE_RGBA, swizzle, false); }