SkColorFilter* SkColorFilter::CreateLightingFilter(SkColor mul, SkColor add) {
SkColorMatrix matrix;
matrix.setScale(byte_to_scale(SkColorGetR(mul)),
byte_to_scale(SkColorGetG(mul)),
byte_to_scale(SkColorGetB(mul)),
1);
matrix.postTranslate(SkIntToScalar(SkColorGetR(add)),
SkIntToScalar(SkColorGetG(add)),
SkIntToScalar(SkColorGetB(add)),
0);
return SkColorMatrixFilter::Create(matrix);
}
static SkColorFilter* make_cf1() {
SkColorMatrix cm;
cm.setSaturation(0.75f);
SkAutoTUnref<SkColorFilter> a(SkColorMatrixFilter::Create(cm));
// CreateComposedFilter will try to concat these two matrices, resulting in a single
// filter (which is good for speed). For this test, we want to force a real compose of
// these two, so our inner filter has a scale-up, which disables the optimization of
// combining the two matrices.
cm.setScale(1.1f, 0.9f, 1);
SkAutoTUnref<SkColorFilter> b(SkColorMatrixFilter::Create(cm));
return SkColorFilter::CreateComposeFilter(a, b);
}
