Load and apply a vcgt table from an ICC file to the internal display

ash/display/display_color_manager_chromeos.h

+// Copyright 2015 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.
+
+#ifndef ASH_DISPLAY_DISPLAY_COLOR_MANAGER_CHROMEOS_H_
+#define ASH_DISPLAY_DISPLAY_COLOR_MANAGER_CHROMEOS_H_
+
+#include <map>
+#include <vector>
+
+#include "ash/ash_export.h"
+#include "base/basictypes.h"
+#include "base/files/file_path.h"
+#include "base/memory/ref_counted.h"
+#include "ui/display/chromeos/display_configurator.h"
+#include "ui/gfx/display.h"
+#include "ui/gfx/display_observer.h"
+
+namespace ash {
+
+// An object that observes changes in display configuration applies any color
+// calibration where needed.
+class ASH_EXPORT DisplayColorManager
+    : public ui::DisplayConfigurator::Observer,
+      public base::RefCountedThreadSafe<DisplayColorManager> {

[oshima, 2015/04/15 23:56:13]

RefCountedThreadSafe is for the special case, where the object needs to be
shared and destroyed on multiple threads and I believe this does not fall into
that use case.

Instead of using RefCountedThreadSafe, please use WeakPtr.

+ public:
+  DisplayColorManager(ui::DisplayConfigurator* configurator);
+
+  // Overriden from ui::DisplayConfigurator::Observer:
+  void OnDisplayModeChanged(
+      const ui::DisplayConfigurator::DisplayStateList& outputs) override;
+  void OnDisplayModeChangeFailed(
+      const ui::DisplayConfigurator::DisplayStateList& displays,
+      ui::MultipleDisplayState failed_new_state) override {}
+
+  struct ColorCalibrationData {
+    ColorCalibrationData();
+    ~ColorCalibrationData();
+
+    std::vector<uint16_t> r;
+    std::vector<uint16_t> g;
+    std::vector<uint16_t> b;
+  };
+
+ private:
+  friend class base::RefCountedThreadSafe<DisplayColorManager>;
+  ~DisplayColorManager() override;
+  void ApplyDisplayColorCalibration(uint64_t display_id);
+  void LoadInternalFromCommandLine();
+  void LoadFromPath(const base::FilePath& path, uint64_t display_id);
+  void UpdateCalibrationData(
+      uint64_t display_id,
+      scoped_ptr<DisplayColorManager::ColorCalibrationData> data);
+
+  ui::DisplayConfigurator* configurator_;
+  std::map<uint64_t, ColorCalibrationData*> calibration_map_;
+  DISALLOW_COPY_AND_ASSIGN(DisplayColorManager);
+};
+
+}  // namespace ash
+
+#endif  // ASH_DISPLAY_DISPLAY_COLOR_MANAGER_CHROMEOS_H_