Color: Separate ICCProfile and ColorSpace structures

ui/gfx/icc_profile.h

+// Copyright 2016 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 UI_GFX_ICC_PROFILE_H_
+#define UI_GFX_ICC_PROFILE_H_
+
+#include <stdint.h>
+#include <vector>
+
+#include "ui/gfx/color_space.h"
+
+#if defined(OS_MACOSX)
+#include <CoreGraphics/CGColorSpace.h>
+#endif
+
+namespace gfx {
+
+// Used to represent a full ICC profile, usually retrieved from a monitor. It
+// can be lossily compressed into a ColorSpace object. This structure should
+// only be sent from higher-privilege processes to lower-privilege processes,
+// as parsing this structure is not secure.
+class GFX_EXPORT ICCProfile {
+ public:
+  ICCProfile();
+  ICCProfile(ICCProfile&& other);
+  ICCProfile(const ICCProfile& other);
+  ICCProfile& operator=(ICCProfile&& other);
+  ICCProfile& operator=(const ICCProfile& other);
+  ~ICCProfile();
+  bool operator==(const ICCProfile& other) const;
+
+  // Returns the color profile of the monitor that can best represent color.
+  // This profile should be used for creating content that does not know on
+  // which monitor it will be displayed.
+  static ICCProfile FromBestMonitor();
+#if defined(OS_MACOSX)
+  static ICCProfile FromCGColorSpace(CGColorSpaceRef cg_color_space);
+#endif
+
+  // This will recover a ICCProfile from a compact ColorSpace representation.
+  // Internally, this will make an effort to create an identical ICCProfile
+  // to the one that created |color_space|, but this is not guaranteed.
+  static ICCProfile FromColorSpace(const gfx::ColorSpace& color_space);
+
+  // This will perform a potentially-lossy conversion to a more compact color
+  // space representation.
+  ColorSpace GetColorSpace() const;
+
+  const std::vector<char>& GetData() const;
+
+#if defined(OS_WIN)
+  // This will read monitor ICC profiles from disk and cache the results for the
+  // other functions to read. This should not be called on the UI or IO thread.
+  static void UpdateCachedProfilesOnBackgroundThread();
+  static bool CachedProfilesNeedUpdate();
+#endif
+
+ private:
+  static ICCProfile FromData(const std::vector<char>& icc_profile);
+  static bool IsValidProfileLength(size_t length);
+
+  bool valid_ = false;
+  std::vector<char> data_;
+
+  // This globally identifies this ICC profile. It is used to look up this ICC
+  // profile from a ColorSpace object created from it.
+  uint64_t id_ = 0;
+
+  // Hard-coded values for the supported non-monitor-ICC-based profiles that we
+  // support (for now).
+  static const uint64_t kSRGBId = 1;
+  static const uint64_t kJpegId = 2;
+  static const uint64_t kRec601Id = 3;
+  static const uint64_t kRec709Id = 4;
+
+  friend class ColorSpace;
+  friend struct IPC::ParamTraits<gfx::ICCProfile>;
+};
+
+}  // namespace gfx
+
+#endif  // UI_GFX_ICC_PROFILE_H_