diff options
Diffstat (limited to 'tests/ColorTest.cpp')
-rw-r--r-- | tests/ColorTest.cpp | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/tests/ColorTest.cpp b/tests/ColorTest.cpp new file mode 100644 index 0000000000..c10897f173 --- /dev/null +++ b/tests/ColorTest.cpp @@ -0,0 +1,27 @@ +#include "Test.h" +#include "SkColor.h" +#include "SkUnPreMultiply.h" + +static void test_premul(skiatest::Reporter* reporter) { + for (int a = 0; a <= 255; a++) { + for (int x = 0; x <= 255; x++) { + SkColor c0 = SkColorSetARGB(a, x, x, x); + SkPMColor p0 = SkPreMultiplyColor(c0); + + SkColor c1 = SkUnPreMultiply::PMColorToColor(p0); + SkPMColor p1 = SkPreMultiplyColor(c1); + + // we can't promise that c0 == c1, since c0 -> p0 is a many to one + // function, however, we can promise that p0 -> c1 -> p1 : p0 == p1 + REPORTER_ASSERT(reporter, p0 == p1); + } + } +} + + +static void TestColor(skiatest::Reporter* reporter) { + test_premul(reporter); +} + +#include "TestClassDef.h" +DEFINE_TESTCLASS("Color", ColorTestClass, TestColor) |