Implement color-gamut media query

third_party/WebKit/Source/platform/graphics/ColorSpace.h

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 13 matching lines @@
  */
 
 #ifndef ColorSpace_h
 #define ColorSpace_h
 
 #include "platform/PlatformExport.h"
 #include "platform/graphics/Color.h"
 #include "third_party/skia/include/core/SkRefCnt.h"
 
 class SkColorFilter;
+class SkColorSpace;
 
 namespace blink {
 
+struct WebScreenInfo;
+
 enum ColorSpace { ColorSpaceDeviceRGB, ColorSpaceSRGB, ColorSpaceLinearRGB };
 
+enum class ColorSpaceGamut {
+  // Values synced with 'Gamut' in src/tools/metrics/histograms/histograms.xml
+  Unknown = 0,
+  LessThanNTSC = 1,
+  NTSC = 2,
+  SRGB = 3,
+  AlmostP3 = 4,
+  P3 = 5,
+  AdobeRGB = 6,
+  Wide = 7,
+  BT2020 = 8,
+  ProPhoto = 9,
+  UltraWide = 10,
+  End
+};
+
 namespace ColorSpaceUtilities {
 
 // Get a pointer to a 8-bit lookup table that will convert color components
 // in the |srcColorSpace| to the |dstColorSpace|.
 // If the conversion cannot be performed, or is a no-op (identity transform),
 // then 0 is returned.
 // (Note that a round-trip - f(B,A)[f(A,B)[x]] - is not lossless in general.)
 const uint8_t* getConversionLUT(ColorSpace dstColorSpace,
                                 ColorSpace srcColorSpace = ColorSpaceDeviceRGB);
 
 // Convert a Color assumed to be in the |srcColorSpace| into the
 // |dstColorSpace|.
 Color convertColor(const Color& srcColor,
                    ColorSpace dstColorSpace,
                    ColorSpace srcColorSpace = ColorSpaceDeviceRGB);
 
 // Create a color filter that will convert from |srcColorSpace| into
 // |dstColorSpace|.
 sk_sp<SkColorFilter> createColorSpaceFilter(ColorSpace srcColorSpace,
                                             ColorSpace dstColorSpace);
 
+PLATFORM_EXPORT ColorSpaceGamut getColorSpaceGamut(const WebScreenInfo&);
+ColorSpaceGamut getColorSpaceGamut(SkColorSpace*);
+
 }  // namespace ColorSpaceUtilities
 
 }  // namespace blink
 
 #endif  // ColorSpace_h