Create a single, unique pointer to sRGB color space

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 23 matching lines @@
     };
     float dst[4];
     for (int i = 0; i < 3; ++i) {
         mat.mapScalars(&src[i*4], dst);
         REPORTER_ASSERT(r, almost_equal(red[i],   dst[0]));
         REPORTER_ASSERT(r, almost_equal(green[i], dst[1]));
         REPORTER_ASSERT(r, almost_equal(blue[i],  dst[2]));
     }
 }
 
+const float g_sRGB_XYZ[] = { 0.4358f, 0.2224f, 0.0139f,   // R
+                             0.3853f, 0.7170f, 0.0971f,   // G
+                             0.1430f, 0.0606f, 0.7139f }; // B
+
 DEF_TEST(ColorSpace_sRGB, r) {
-    const float srgb_r[] = { 0.4358f, 0.2224f, 0.0139f };
-    const float srgb_g[] = { 0.3853f, 0.7170f, 0.0971f };
-    const float srgb_b[] = { 0.1430f, 0.0606f, 0.7139f };
     const float srgb_gamma[] = { 2.2f, 2.2f, 2.2f };
     test_space(r, SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named).get(),
-               srgb_r, srgb_g, srgb_b, srgb_gamma);
+               g_sRGB_XYZ, &g_sRGB_XYZ[3], &g_sRGB_XYZ[6], srgb_gamma);
 
 }
 
 static SkStreamAsset* resource(const char path[]) {
     SkString fullPath = GetResourcePath(path);
     return SkStream::NewFromFile(fullPath.c_str());
 }
 
 DEF_TEST(ColorSpaceParsePngICCProfile, r) {
     SkAutoTDelete<SkStream> stream(resource("color_wheel_with_profile.png"));
@@ skipping 32 matching lines @@
 
     SkColorSpace* colorSpace = codec->getColorSpace();
     REPORTER_ASSERT(r, nullptr != colorSpace);
 
     const float red[] = { 0.385117f, 0.716904f, 0.0970612f };
     const float green[] = { 0.143051f, 0.0606079f, 0.713913f };
     const float blue[] = { 0.436035f, 0.222488f, 0.013916f };
     const float gamma[] = { 2.2f, 2.2f, 2.2f };
     test_space(r, colorSpace, red, green, blue, gamma);
 }
+
+DEF_TEST(ColorSpaceSRGBCompare, r) {
+    // Create an sRGB color space by name
+    sk_sp<SkColorSpace> namedColorSpace = SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named);
+
+    // Create an sRGB color space by value
+    SkMatrix44 srgbToxyzD50(SkMatrix44::kUninitialized_Constructor);
+    srgbToxyzD50.set3x3ColMajorf(g_sRGB_XYZ);
+    sk_sp<SkColorSpace> rgbColorSpace = SkColorSpace::NewRGB(
+            SkColorSpace::SkGammas(2.2f, 2.2f, 2.2f), srgbToxyzD50);
+    REPORTER_ASSERT(r, namedColorSpace == namedColorSpace);
+
+    // Change a single value from the sRGB matrix
+    srgbToxyzD50.set(2, 2, 0.5f);
+    sk_sp<SkColorSpace> strangeColorSpace = SkColorSpace::NewRGB(
+            SkColorSpace::SkGammas(2.2f, 2.2f, 2.2f), srgbToxyzD50);
+    REPORTER_ASSERT(r, strangeColorSpace != namedColorSpace);
+}