void radeonGenerateMipmap(GLcontext* ctx, GLenum target, struct gl_texture_object *texObj) { radeonContextPtr rmesa = RADEON_CONTEXT(ctx); struct radeon_bo *bo; GLuint face = _mesa_tex_target_to_face(target); radeon_texture_image *baseimage = get_radeon_texture_image(texObj->Image[face][texObj->BaseLevel]); bo = !baseimage->mt ? baseimage->bo : baseimage->mt->bo; radeon_print(RADEON_TEXTURE, RADEON_TRACE, "%s(%p, target %s, tex %p)\n", __func__, ctx, _mesa_lookup_enum_by_nr(target), texObj); if (bo && radeon_bo_is_referenced_by_cs(bo, rmesa->cmdbuf.cs)) { radeon_print(RADEON_TEXTURE, RADEON_NORMAL, "%s(%p, tex %p) Trying to generate mipmap for texture " "in processing by GPU.\n", __func__, ctx, texObj); radeon_firevertices(rmesa); } if (_mesa_meta_check_generate_mipmap_fallback(ctx, target, texObj)) { radeon_teximage_map(baseimage, GL_FALSE); radeon_generate_mipmap(ctx, target, texObj); radeon_teximage_unmap(baseimage); } else { _mesa_meta_GenerateMipmap(ctx, target, texObj); } }
/** * Called via ctx->Driver.GenerateMipmap() * This is basically a wrapper for _mesa_meta_GenerateMipmap() which checks * if we'll be using software mipmap generation. In that case, we need to * map/unmap the base level texture image. */ static void intelGenerateMipmap(struct gl_context *ctx, GLenum target, struct gl_texture_object *texObj) { if (_mesa_meta_check_generate_mipmap_fallback(ctx, target, texObj)) { /* sw path: need to map texture images */ struct intel_context *intel = intel_context(ctx); struct intel_texture_object *intelObj = intel_texture_object(texObj); struct gl_texture_image *first_image = texObj->Image[0][texObj->BaseLevel]; fallback_debug("%s - fallback to swrast\n", __FUNCTION__); intel_tex_map_level_images(intel, intelObj, texObj->BaseLevel); _mesa_generate_mipmap(ctx, target, texObj); intel_tex_unmap_level_images(intel, intelObj, texObj->BaseLevel); if (!_mesa_is_format_compressed(first_image->TexFormat)) { GLuint nr_faces = (texObj->Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1; GLuint face, i; /* Update the level information in our private data in the new images, * since it didn't get set as part of a normal TexImage path. */ for (face = 0; face < nr_faces; face++) { for (i = texObj->BaseLevel + 1; i < texObj->MaxLevel; i++) { struct intel_texture_image *intelImage = intel_texture_image(texObj->Image[face][i]); if (!intelImage) break; intelImage->level = i; intelImage->face = face; /* Unreference the miptree to signal that the new Data is a * bare pointer from mesa. */ intel_miptree_release(intel, &intelImage->mt); } } } } else { _mesa_meta_GenerateMipmap(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); } } }