Converting video color space enums to their corresponding gfx:color space eqvivalent.

media/base/video_color_space_unittest.cc

+// 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 "media/base/video_color_space.h"
+#include "base/logging.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/color_space.h"
+#include "ui/gfx/color_transform.h"
+#include "ui/gfx/transform.h"
+
+namespace media {
+
+class VideoColorSpaceTest : public testing::Test {};
+
+TEST(VideoColorSpaceTest, UnknownVideoToSRGB) {
+  // Invalid video spaces should be BT709.
+  VideoColorSpace invalid_video_color_space = VideoColorSpace(
+      VideoColorSpace::PrimaryID::INVALID, VideoColorSpace::TransferID::INVALID,
+      VideoColorSpace::MatrixID::INVALID, gfx::ColorSpace::RangeID::LIMITED);
+  gfx::ColorSpace unknown = invalid_video_color_space.ToGfxColorSpace();
+  gfx::ColorSpace sRGB = gfx::ColorSpace::CreateSRGB();
+  std::unique_ptr<gfx::ColorTransform> t(gfx::ColorTransform::NewColorTransform(
+      unknown, sRGB, gfx::ColorTransform::Intent::INTENT_PERCEPTUAL));
+
+  gfx::ColorTransform::TriStim tmp(16.0f / 255.0f, 0.5f, 0.5f);
+  t->Transform(&tmp, 1);
+  EXPECT_NEAR(tmp.x(), 0.0f, 0.001f);
+  EXPECT_NEAR(tmp.y(), 0.0f, 0.001f);
+  EXPECT_NEAR(tmp.z(), 0.0f, 0.001f);
+
+  tmp = gfx::ColorTransform::TriStim(235.0f / 255.0f, 0.5f, 0.5f);
+  t->Transform(&tmp, 1);
+  EXPECT_NEAR(tmp.x(), 1.0f, 0.001f);
+  EXPECT_NEAR(tmp.y(), 1.0f, 0.001f);
+  EXPECT_NEAR(tmp.z(), 1.0f, 0.001f);
+
+  // Test a blue color
+  tmp = gfx::ColorTransform::TriStim(128.0f / 255.0f, 240.0f / 255.0f, 0.5f);
+  t->Transform(&tmp, 1);
+  EXPECT_GT(tmp.z(), tmp.x());
+  EXPECT_GT(tmp.z(), tmp.y());
+}
+
+}  // namespace media