Reland Allow one-copy and zero-copy task tile worker pools to use compressed textures.

cc/output/renderer_settings.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/output/renderer_settings.h"
 
 #include <limits>
 
 #include "base/logging.h"
 #include "cc/proto/renderer_settings.pb.h"
+#include "cc/resources/platform_color.h"
 
 namespace cc {
 
 RendererSettings::RendererSettings()
     : allow_antialiasing(true),
       force_antialiasing(false),
       force_blending_with_shaders(false),
       partial_swap_enabled(false),
       finish_rendering_on_resize(false),
       should_clear_root_render_pass(true),
       disable_display_vsync(false),
       release_overlay_resources_on_swap_complete(false),
       refresh_rate(60.0),
       highp_threshold_min(0),
-      use_rgba_4444_textures(false),
       texture_id_allocation_chunk_size(64),
-      use_gpu_memory_buffer_resources(false) {}
+      use_gpu_memory_buffer_resources(false),
+      preferred_tile_format(PlatformColor::BestTextureFormat()) {}
 
 RendererSettings::~RendererSettings() {
 }
 
 void RendererSettings::ToProtobuf(proto::RendererSettings* proto) const {
   proto->set_allow_antialiasing(allow_antialiasing);
   proto->set_force_antialiasing(force_antialiasing);
   proto->set_force_blending_with_shaders(force_blending_with_shaders);
   proto->set_partial_swap_enabled(partial_swap_enabled);
   proto->set_finish_rendering_on_resize(finish_rendering_on_resize);
   proto->set_should_clear_root_render_pass(should_clear_root_render_pass);
   proto->set_disable_display_vsync(disable_display_vsync);
   proto->set_release_overlay_resources_on_swap_complete(
       release_overlay_resources_on_swap_complete);
   proto->set_refresh_rate(refresh_rate);
   proto->set_highp_threshold_min(highp_threshold_min);
-  proto->set_use_rgba_4444_textures(use_rgba_4444_textures);
   proto->set_texture_id_allocation_chunk_size(texture_id_allocation_chunk_size);
   proto->set_use_gpu_memory_buffer_resources(use_gpu_memory_buffer_resources);
+  proto->set_preferred_tile_format(preferred_tile_format);
 }
 
 void RendererSettings::FromProtobuf(const proto::RendererSettings& proto) {
   allow_antialiasing = proto.allow_antialiasing();
   force_antialiasing = proto.force_antialiasing();
   force_blending_with_shaders = proto.force_blending_with_shaders();
   partial_swap_enabled = proto.partial_swap_enabled();
   finish_rendering_on_resize = proto.finish_rendering_on_resize();
   should_clear_root_render_pass = proto.should_clear_root_render_pass();
   disable_display_vsync = proto.disable_display_vsync();
   release_overlay_resources_on_swap_complete =
       proto.release_overlay_resources_on_swap_complete();
   refresh_rate = proto.refresh_rate();
   highp_threshold_min = proto.highp_threshold_min();
-  use_rgba_4444_textures = proto.use_rgba_4444_textures();
   texture_id_allocation_chunk_size = proto.texture_id_allocation_chunk_size();
   use_gpu_memory_buffer_resources = proto.use_gpu_memory_buffer_resources();
+
+  DCHECK_LE(proto.preferred_tile_format(),
+            static_cast<uint32_t>(RESOURCE_FORMAT_MAX));
+  preferred_tile_format =
+      static_cast<ResourceFormat>(proto.preferred_tile_format());
 }
 
 bool RendererSettings::operator==(const RendererSettings& other) const {
   return allow_antialiasing == other.allow_antialiasing &&
          force_antialiasing == other.force_antialiasing &&
          force_blending_with_shaders == other.force_blending_with_shaders &&
          partial_swap_enabled == other.partial_swap_enabled &&
          finish_rendering_on_resize == other.finish_rendering_on_resize &&
          should_clear_root_render_pass == other.should_clear_root_render_pass &&
          disable_display_vsync == other.disable_display_vsync &&
          release_overlay_resources_on_swap_complete ==
              other.release_overlay_resources_on_swap_complete &&
          refresh_rate == other.refresh_rate &&
          highp_threshold_min == other.highp_threshold_min &&
-         use_rgba_4444_textures == other.use_rgba_4444_textures &&
          texture_id_allocation_chunk_size ==
              other.texture_id_allocation_chunk_size &&
          use_gpu_memory_buffer_resources ==
-             other.use_gpu_memory_buffer_resources;
+             other.use_gpu_memory_buffer_resources &&
+         preferred_tile_format == other.preferred_tile_format;
 }
 
 }  // namespace cc