special-case matrix invert for translate and scale
update unittest to use diff scale-x and scale-y values, and tests for non-invertible scale matrices
Review URL: https://codereview.appspot.com/7027055
git-svn-id: http://skia.googlecode.com/svn/trunk@7019 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/MatrixTest.cpp b/tests/MatrixTest.cpp
index 894278e..bba2e08 100644
--- a/tests/MatrixTest.cpp
+++ b/tests/MatrixTest.cpp
@@ -384,13 +384,13 @@
iden1.setConcat(mat, inverse);
REPORTER_ASSERT(reporter, is_identity(iden1));
- mat.setScale(SkIntToScalar(2), SkIntToScalar(2));
+ mat.setScale(SkIntToScalar(2), SkIntToScalar(4));
REPORTER_ASSERT(reporter, mat.invert(&inverse));
iden1.setConcat(mat, inverse);
REPORTER_ASSERT(reporter, is_identity(iden1));
test_flatten(reporter, mat);
- mat.setScale(SK_Scalar1/2, SK_Scalar1/2);
+ mat.setScale(SK_Scalar1/2, SkIntToScalar(2));
REPORTER_ASSERT(reporter, mat.invert(&inverse));
iden1.setConcat(mat, inverse);
REPORTER_ASSERT(reporter, is_identity(iden1));
@@ -407,6 +407,11 @@
test_flatten(reporter, mat);
test_flatten(reporter, iden2);
+ mat.setScale(0, SK_Scalar1);
+ REPORTER_ASSERT(reporter, !mat.invert(&inverse));
+ mat.setScale(SK_Scalar1, 0);
+ REPORTER_ASSERT(reporter, !mat.invert(&inverse));
+
// rectStaysRect test
{
static const struct {