blob: 371f6e4b8f8a4798fdd9f55a3a71c73c49d1d819 [file] [log] [blame]
// Copyright 2018 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 <CoreGraphics/CoreGraphics.h>
#include "base/containers/flat_map.h"
#include "base/mac/scoped_cftyperef.h"
#include "base/macros.h"
#include "base/no_destructor.h"
#include "ui/gfx/color_space.h"
#include "ui/gfx/color_space_export.h"
namespace gfx {
// A map from ColorSpace objects to the display ICC profile data from which the
// ColorSpace was derived.
// - The color space for an IOSurface, when composited by CoreAnimation, is
// specified via ICC profile metadata.
// - The power cost of compositing an IOSurface that has the same color space
// as the display it is being composited to is substantially less (~0.5 W for
// fullscreen updates at 60fps) than the cost of compositing an IOSurface
// that has a different color space than the display is being composited to.
// - This power savings is realized only if the ICC profile metadata on the
// IOSurface matches, byte-for-byte, the profile of the CGDirectDisplayID it
// is being displayed on.
// - This structure maintains a map from ColorSpace objects to ICC profile data
// for all displays in the system (and auto-updates as displays change).
class COLOR_SPACE_EXPORT DisplayICCProfiles {
static DisplayICCProfiles* GetInstance();
// This will return null if |color_space| does not correspond to a display.
base::ScopedCFTypeRef<CFDataRef> GetDataForColorSpace(
const ColorSpace& color_space);
friend class base::NoDestructor<DisplayICCProfiles>;
static void DisplayReconfigurationCallBack(CGDirectDisplayID display,
CGDisplayChangeSummaryFlags flags,
void* user_info);
void UpdateIfNeeded();
base::flat_map<ColorSpace, base::ScopedCFTypeRef<CFDataRef>> map_;
bool needs_update_ = true;
} // namespace gfx