diff options
-rw-r--r-- | tests/ColorTest.cpp | 27 | ||||
-rw-r--r-- | tests/tests_files.mk | 1 |
2 files changed, 28 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) diff --git a/tests/tests_files.mk b/tests/tests_files.mk index f78481aa04..28d5fe75f9 100644 --- a/tests/tests_files.mk +++ b/tests/tests_files.mk @@ -7,6 +7,7 @@ SOURCE := \ ClipStackTest.cpp \ ClipperTest.cpp \ ColorFilterTest.cpp \ + ColorTest.cpp \ DequeTest.cpp \ DrawBitmapRectTest.cpp \ FillPathTest.cpp \ |