Initialize RendererSettings in ContextFactory

ui/compositor/compositor_util.cc

+// Copyright 2017 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 "ui/compositor/compositor_util.h"
+
+#include "base/command_line.h"
+#include "cc/base/switches.h"
+#include "cc/output/renderer_settings.h"
+#include "ui/compositor/compositor_switches.h"
+#include "ui/display/display_switches.h"
+#include "ui/gfx/switches.h"
+
+namespace ui {
+
+void InitializeRendererSettings(
+    const base::Callback<uint32_t(gfx::BufferFormat, gfx::BufferUsage)>&
+        texture_target_callback,
+    cc::RendererSettings* renderer_settings) {
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
+  renderer_settings->partial_swap_enabled =
+      !command_line->HasSwitch(switches::kUIDisablePartialSwap);
+#if defined(OS_WIN)
+  renderer_settings->finish_rendering_on_resize = true;
+#elif defined(OS_MACOSX)
+  renderer_settings->release_overlay_resources_after_gpu_query = true;
+#endif
+  renderer_settings->gl_composited_texture_quad_border =
+      command_line->HasSwitch(cc::switches::kGlCompositedTextureQuadBorder);
+  renderer_settings->show_overdraw_feedback =
+      command_line->HasSwitch(cc::switches::kShowOverdrawFeedback);
+  if (command_line->HasSwitch(switches::kUIEnableRGBA4444Textures))
+    renderer_settings->preferred_tile_format = cc::RGBA_4444;
+  renderer_settings->enable_color_correct_rendering =
+      command_line->HasSwitch(switches::kEnableColorCorrectRendering) ||
+      command_line->HasSwitch(switches::kEnableHDR);
+  // Populate buffer_to_texture_target_map for all buffer usage/formats.
+  for (int usage_idx = 0; usage_idx <= static_cast<int>(gfx::BufferUsage::LAST);
+       ++usage_idx) {
+    gfx::BufferUsage usage = static_cast<gfx::BufferUsage>(usage_idx);
+    for (int format_idx = 0;
+         format_idx <= static_cast<int>(gfx::BufferFormat::LAST);
+         ++format_idx) {
+      gfx::BufferFormat format = static_cast<gfx::BufferFormat>(format_idx);
+      renderer_settings
+          ->buffer_to_texture_target_map[std::make_pair(usage, format)] =
+          texture_target_callback.Run(format, usage);
+    }
+  }
+  renderer_settings->disallow_non_exact_resource_reuse =
+      command_line->HasSwitch(cc::switches::kDisallowNonExactResourceReuse);
+}
+
+}  // namespace ui