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Unified Diff: tests/ColorSpaceTest.cpp

Issue 1726823002: Set SkColorSpace object for PNGs and parse ICC profiles (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Rebase Created 4 years, 10 months ago
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Index: tests/ColorSpaceTest.cpp
diff --git a/tests/ColorSpaceTest.cpp b/tests/ColorSpaceTest.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..cf7560228fdf8704f32d52725ac50af87f495291
--- /dev/null
+++ b/tests/ColorSpaceTest.cpp
@@ -0,0 +1,51 @@
+/*
+ * 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"
+#include "Test.h"
+
+static SkStreamAsset* resource(const char path[]) {
+ SkString fullPath = GetResourcePath(path);
+ return SkStream::NewFromFile(fullPath.c_str());
+}
+
+static bool almost_equal(float a, float b) {
+ return SkTAbs(a - b) < 0.0001f;
+}
+
+DEF_TEST(ColorSpaceParseICCProfile, r) {
+ SkAutoTDelete<SkStream> stream(resource("color_wheel_with_profile.png"));
+ REPORTER_ASSERT(r, nullptr != stream);
+
+ SkAutoTDelete<SkCodec> codec(SkCodec::NewFromStream(stream.detach()));
+ REPORTER_ASSERT(r, nullptr != codec);
+
+ SkColorSpace* colorSpace = codec->getColorSpace();
+ REPORTER_ASSERT(r, nullptr != colorSpace);
+
+ // No need to use almost equal here. The color profile that we have extracted
+ // actually has a table of gammas. And our current implementation guesses 2.2f.
+ SkFloat3 gammas = colorSpace->gamma();
+ REPORTER_ASSERT(r, 2.2f == gammas.fVec[0]);
+ REPORTER_ASSERT(r, 2.2f == gammas.fVec[1]);
+ REPORTER_ASSERT(r, 2.2f == gammas.fVec[2]);
+
+ // These nine values were extracted from the color profile in isolation (before
+ // we embedded it in the png). Here we check that we still extract the same values.
+ SkFloat3x3 xyz = colorSpace->xyz();
+ REPORTER_ASSERT(r, almost_equal(0.436066f, xyz.fMat[0]));
+ REPORTER_ASSERT(r, almost_equal(0.222488f, xyz.fMat[1]));
+ REPORTER_ASSERT(r, almost_equal(0.013916f, xyz.fMat[2]));
+ REPORTER_ASSERT(r, almost_equal(0.385147f, xyz.fMat[3]));
+ REPORTER_ASSERT(r, almost_equal(0.716873f, xyz.fMat[4]));
+ REPORTER_ASSERT(r, almost_equal(0.0970764f, xyz.fMat[5]));
+ REPORTER_ASSERT(r, almost_equal(0.143066f, xyz.fMat[6]));
+ REPORTER_ASSERT(r, almost_equal(0.0606079f, xyz.fMat[7]));
+ REPORTER_ASSERT(r, almost_equal(0.714096f, xyz.fMat[8]));
+}
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