Consolidate canvas color params into a single class

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

Index: third_party/WebKit/Source/platform/graphics/CanvasColorParams.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/CanvasColorParams.cpp b/third_party/WebKit/Source/platform/graphics/CanvasColorParams.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..ea86467666e551f63286f205e2493ce5d5471399
--- /dev/null
+++ b/third_party/WebKit/Source/platform/graphics/CanvasColorParams.cpp
@@ -0,0 +1,49 @@
+// 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/CanvasColorParams.h"
+
+#include "ui/gfx/color_space.h"
+
+namespace blink {
+
+CanvasColorParams::CanvasColorParams(CanvasColorSpace color_space,
+                                     CanvasPixelFormat pixel_format)
+    : color_space_(color_space), pixel_format_(pixel_format) {}
+
+sk_sp<SkColorSpace> CanvasColorParams::GetSkColorSpaceForSkSurfaces() const {
+  if (color_space_ == kLegacyCanvasColorSpace)
+    return nullptr;
+  return GetGfxColorSpace().ToSkColorSpace();
+}
+
+SkColorType CanvasColorParams::GetSkColorType() const {
+  if (pixel_format_ == kF16CanvasPixelFormat)
+    return kRGBA_F16_SkColorType;
+  return kN32_SkColorType;
+}
+
+gfx::ColorSpace CanvasColorParams::GetGfxColorSpace() const {
+  switch (color_space_) {
+    case kLegacyCanvasColorSpace:
+      return gfx::ColorSpace::CreateSRGB();
+    case kSRGBCanvasColorSpace:
+      if (pixel_format_ == kF16CanvasPixelFormat)
+        return gfx::ColorSpace::CreateSCRGBLinear();
+      return gfx::ColorSpace::CreateSRGB();
+    case kRec2020CanvasColorSpace:
+      return gfx::ColorSpace(gfx::ColorSpace::PrimaryID::BT2020,
+                             gfx::ColorSpace::TransferID::IEC61966_2_1);
+    case kP3CanvasColorSpace:
+      return gfx::ColorSpace(gfx::ColorSpace::PrimaryID::SMPTEST432_1,
+                             gfx::ColorSpace::TransferID::IEC61966_2_1);
+  }
+  return gfx::ColorSpace();
+}
+
+bool CanvasColorParams::LinearPixelMath() const {
+  return pixel_format_ == kF16CanvasPixelFormat;
+}
+
+}  // namespace blink