color: Rename blink::ColorSpace to blink::InterpolationSpace

third_party/WebKit/Source/platform/graphics/ColorSpaceGamut.cpp

Index: third_party/WebKit/Source/platform/graphics/ColorSpaceGamut.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/ColorSpaceGamut.cpp b/third_party/WebKit/Source/platform/graphics/ColorSpaceGamut.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..452a1979661fac0a0e8b80a335fc78a17f012e02
--- /dev/null
+++ b/third_party/WebKit/Source/platform/graphics/ColorSpaceGamut.cpp
@@ -0,0 +1,68 @@
+// 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 "platform/graphics/ColorSpaceGamut.h"
+
+#include "public/platform/WebScreenInfo.h"
+#include "third_party/skia/include/core/SkColorSpaceXform.h"
+
+namespace blink {
+
+namespace ColorSpaceUtilities {
+
+ColorSpaceGamut GetColorSpaceGamut(const WebScreenInfo& screen_info) {
+  const gfx::ICCProfile& profile = screen_info.icc_profile;
+  if (profile == gfx::ICCProfile())
+    return ColorSpaceGamut::kUnknown;
+
+  return ColorSpaceUtilities::GetColorSpaceGamut(
+      profile.GetColorSpace().ToSkColorSpace().get());
+}
+
+ColorSpaceGamut GetColorSpaceGamut(SkColorSpace* color_space) {
+  sk_sp<SkColorSpace> sc_rgb(SkColorSpace::MakeSRGBLinear());
+  std::unique_ptr<SkColorSpaceXform> transform(
+      SkColorSpaceXform::New(color_space, sc_rgb.get()));
+
+  if (!transform)
+    return ColorSpaceGamut::kUnknown;
+
+  unsigned char in[3][4];
+  float out[3][4];
+  memset(in, 0, sizeof(in));
+  in[0][0] = 255;
+  in[1][1] = 255;
+  in[2][2] = 255;
+  in[0][3] = 255;
+  in[1][3] = 255;
+  in[2][3] = 255;
+  transform->apply(SkColorSpaceXform::kRGBA_F32_ColorFormat, out,
+                   SkColorSpaceXform::kRGBA_8888_ColorFormat, in, 3,
+                   kOpaque_SkAlphaType);
+  float score = out[0][0] * out[1][1] * out[2][2];
+
+  if (score < 0.9)
+    return ColorSpaceGamut::kLessThanNTSC;
+  if (score < 0.95)
+    return ColorSpaceGamut::NTSC;  // actual score 0.912839
+  if (score < 1.1)
+    return ColorSpaceGamut::SRGB;  // actual score 1.0
+  if (score < 1.3)
+    return ColorSpaceGamut::kAlmostP3;
+  if (score < 1.425)
+    return ColorSpaceGamut::P3;  // actual score 1.401899
+  if (score < 1.5)
+    return ColorSpaceGamut::kAdobeRGB;  // actual score 1.458385
+  if (score < 2.0)
+    return ColorSpaceGamut::kWide;
+  if (score < 2.2)
+    return ColorSpaceGamut::BT2020;  // actual score 2.104520
+  if (score < 2.7)
+    return ColorSpaceGamut::kProPhoto;  // actual score 2.913247
+  return ColorSpaceGamut::kUltraWide;
+}
+
+}  // namespace ColorSpaceUtilities
+
+}  // namespace blink