Add SkColorSpaceTransferFn to SkColorSpace

tests/ColorSpaceTest.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Resources.h"
 #include "SkCodec.h"
 #include "SkColorSpace.h"
@@ skipping 211 matching lines @@
     monitorData = SkData::MakeFromFileName( GetResourcePath("icc_profiles/HP_Z32x.icc").c_str());
     test_serialize(r, SkColorSpace::NewICC(monitorData->data(), monitorData->size()).get(), false);
     monitorData = SkData::MakeFromFileName(GetResourcePath("icc_profiles/upperLeft.icc").c_str());
     test_serialize(r, SkColorSpace::NewICC(monitorData->data(), monitorData->size()).get(), false);
     monitorData = SkData::MakeFromFileName(GetResourcePath("icc_profiles/upperRight.icc").c_str());
     test_serialize(r, SkColorSpace::NewICC(monitorData->data(), monitorData->size()).get(), false);
 
     const float gammas[] = { 1.1f, 1.2f, 1.7f, };
     SkMatrix44 toXYZ(SkMatrix44::kIdentity_Constructor);
     test_serialize(r, SkColorSpace_Base::NewRGB(gammas, toXYZ).get(), false);
+
+    SkColorSpaceTransferFn fn;
+    fn.fA = 1.0f;
+    fn.fB = 0.0f;
+    fn.fC = 0.0f;
+    fn.fD = 0.5f;
+    fn.fE = 1.0f;
+    fn.fF = 0.0f;
+    fn.fG = 1.0f;
+    test_serialize(r, SkColorSpace::NewRGB(fn, toXYZ).get(), false);
 }
 
 DEF_TEST(ColorSpace_Equals, r) {
     sk_sp<SkColorSpace> srgb = SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named);
     sk_sp<SkColorSpace> adobe = SkColorSpace::NewNamed(SkColorSpace::kAdobeRGB_Named);
     sk_sp<SkData> data = SkData::MakeFromFileName(
             GetResourcePath("icc_profiles/HP_ZR30w.icc").c_str());
     sk_sp<SkColorSpace> z30 = SkColorSpace::NewICC(data->data(), data->size());
     data = SkData::MakeFromFileName( GetResourcePath("icc_profiles/HP_Z32x.icc").c_str());
     sk_sp<SkColorSpace> z32 = SkColorSpace::NewICC(data->data(), data->size());
     data = SkData::MakeFromFileName(GetResourcePath("icc_profiles/upperLeft.icc").c_str());
     sk_sp<SkColorSpace> upperLeft = SkColorSpace::NewICC(data->data(), data->size());
     data = SkData::MakeFromFileName(GetResourcePath("icc_profiles/upperRight.icc").c_str());
     sk_sp<SkColorSpace> upperRight = SkColorSpace::NewICC(data->data(), data->size());
     const float gammas1[] = { 1.1f, 1.2f, 1.3f, };
     const float gammas2[] = { 1.1f, 1.2f, 1.7f, };
     SkMatrix44 toXYZ(SkMatrix44::kIdentity_Constructor);
     sk_sp<SkColorSpace> rgb1 = SkColorSpace_Base::NewRGB(gammas1, toXYZ);
     sk_sp<SkColorSpace> rgb2 = SkColorSpace_Base::NewRGB(gammas2, toXYZ);
     sk_sp<SkColorSpace> rgb3 = SkColorSpace_Base::NewRGB(gammas1, toXYZ);
 
+    SkColorSpaceTransferFn fn;
+    fn.fA = 1.0f;
+    fn.fB = 0.0f;
+    fn.fC = 0.0f;
+    fn.fD = 0.5f;
+    fn.fE = 1.0f;
+    fn.fF = 0.0f;
+    fn.fG = 1.0f;
+    sk_sp<SkColorSpace> rgb4 = SkColorSpace::NewRGB(fn, toXYZ);
+
     REPORTER_ASSERT(r, SkColorSpace::Equals(nullptr, nullptr));
     REPORTER_ASSERT(r, SkColorSpace::Equals(srgb.get(), srgb.get()));
     REPORTER_ASSERT(r, SkColorSpace::Equals(adobe.get(), adobe.get()));
     REPORTER_ASSERT(r, SkColorSpace::Equals(z30.get(), z30.get()));
     REPORTER_ASSERT(r, SkColorSpace::Equals(z32.get(), z32.get()));
     REPORTER_ASSERT(r, SkColorSpace::Equals(upperLeft.get(), upperLeft.get()));
     REPORTER_ASSERT(r, SkColorSpace::Equals(upperRight.get(), upperRight.get()));
     REPORTER_ASSERT(r, SkColorSpace::Equals(rgb1.get(), rgb1.get()));
     REPORTER_ASSERT(r, SkColorSpace::Equals(rgb1.get(), rgb3.get()));
+    REPORTER_ASSERT(r, SkColorSpace::Equals(rgb4.get(), rgb4.get()));
 
     REPORTER_ASSERT(r, !SkColorSpace::Equals(nullptr, srgb.get()));
     REPORTER_ASSERT(r, !SkColorSpace::Equals(srgb.get(), nullptr));
     REPORTER_ASSERT(r, !SkColorSpace::Equals(adobe.get(), srgb.get()));
     REPORTER_ASSERT(r, !SkColorSpace::Equals(z30.get(), srgb.get()));
     REPORTER_ASSERT(r, !SkColorSpace::Equals(z32.get(), z30.get()));
     REPORTER_ASSERT(r, !SkColorSpace::Equals(upperLeft.get(), srgb.get()));
     REPORTER_ASSERT(r, !SkColorSpace::Equals(upperLeft.get(), upperRight.get()));
     REPORTER_ASSERT(r, !SkColorSpace::Equals(z30.get(), upperRight.get()));
     REPORTER_ASSERT(r, !SkColorSpace::Equals(upperRight.get(), adobe.get()));
     REPORTER_ASSERT(r, !SkColorSpace::Equals(rgb1.get(), rgb2.get()));
+    REPORTER_ASSERT(r, !SkColorSpace::Equals(rgb1.get(), rgb4.get()));
 }
 
 DEF_TEST(ColorSpace_Primaries, r) {
     // sRGB primaries
     SkColorSpacePrimaries primaries;
     primaries.fRX = 0.64f;
     primaries.fRY = 0.33f;
     primaries.fGX = 0.30f;
     primaries.fGY = 0.60f;
     primaries.fBX = 0.15f;
     primaries.fBY = 0.06f;
     primaries.fWX = 0.3127f;
     primaries.fWY = 0.3290f;
 
     SkMatrix44 toXYZ(SkMatrix44::kUninitialized_Constructor);
     bool result = primaries.toXYZD50(&toXYZ);
     REPORTER_ASSERT(r, result);
 
     sk_sp<SkColorSpace> space = SkColorSpace::NewRGB(SkColorSpace::kSRGB_RenderTargetGamma, toXYZ);
     REPORTER_ASSERT(r, SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named) == space);
 }