Initialize RendererSettings in ContextFactory

ui/compositor/compositor_util.cc

Index: ui/compositor/compositor_util.cc
diff --git a/ui/compositor/compositor_util.cc b/ui/compositor/compositor_util.cc
new file mode 100644
index 0000000000000000000000000000000000000000..39109bc92dbefa09be71172323d15dd5ee8fd85e
--- /dev/null
+++ b/ui/compositor/compositor_util.cc
@@ -0,0 +1,55 @@
+// 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 {
+
+cc::RendererSettings CreateRendererSettings(uint32_t (
+    *get_texture_target)(gfx::BufferFormat format, gfx::BufferUsage usage)) {
+  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)] =
+          get_texture_target(format, usage);
+    }
+  }
+  renderer_settings.disallow_non_exact_resource_reuse =
+      command_line->HasSwitch(cc::switches::kDisallowNonExactResourceReuse);
+
+  return renderer_settings;
+}
+
+}  // namespace ui