DEF_TEST(ColorMatrix_clamp_while_unpremul, r) {
// This matrix does green += 255/255 and alpha += 32/255. We want to test
// that if we pass it opaque alpha and small red and blue values, red and
// blue stay unchanged, not pumped up by that ~1.12 intermediate alpha.
float m[] = {
1, 0, 0, 0, 0,
0, 1, 0, 0, 1,
0, 0, 1, 0, 0,
0, 0, 0, 1, 32.0f/255,
};
auto filter = SkColorFilters::Matrix(m);
SkColor filtered = filter->filterColor(0xff0a0b0c);
REPORTER_ASSERT(r, SkColorGetA(filtered) == 0xff);
REPORTER_ASSERT(r, SkColorGetR(filtered) == 0x0a);
REPORTER_ASSERT(r, SkColorGetG(filtered) == 0xff);
REPORTER_ASSERT(r, SkColorGetB(filtered) == 0x0c);
}
static void test_getConstantColorComponents(skiatest::Reporter* reporter, GrContext* grContext) {
struct GetConstantComponentTestCase {
// "Shape drawn with"
uint32_t inputComponents; // "rgb of", "red of", "alpha of", ...
GrColor inputColor; // "[color]"
SkColor filterColor; // "with filter color [color]"
SkXfermode::Mode filterMode; // "in mode [mode]"
// "produces"
uint32_t outputComponents; // "rgb of", "red of", "alpha of", ...
GrColor outputColor; // "[color]"
};
// Shorthands.
enum {
kR = kR_GrColorComponentFlag,
kG = kG_GrColorComponentFlag,
kB = kB_GrColorComponentFlag,
kA = kA_GrColorComponentFlag,
kRGB = kRGB_GrColorComponentFlags,
kRGBA = kRGBA_GrColorComponentFlags
};
// Note: below, SkColors are non-premultiplied, where as GrColors are premultiplied.
const SkColor c1 = SkColorSetARGB(200, 200, 200, 200);
const SkColor c2 = SkColorSetARGB(60, 60, 60, 60);
const GrColor gr_c1 = SkColor2GrColor(c1);
const GrColor gr_c2 = SkColor2GrColor(c2);
const GrColor gr_black = GrColorPackA4(0);
const GrColor gr_white = GrColorPackA4(255);
const GrColor gr_whiteTrans = GrColorPackA4(128);
GetConstantComponentTestCase filterTests[] = {
// A color filtered with Clear produces black.
{ kRGBA, gr_white, SK_ColorBLACK, SkXfermode::kClear_Mode, kRGBA, gr_black },
{ kRGBA, gr_c1, SK_ColorWHITE, SkXfermode::kClear_Mode, kRGBA, gr_black },
{ kR, gr_white, c1, SkXfermode::kClear_Mode, kRGBA, gr_black },
// A color filtered with a color in mode Src, produces the filter color.
{ kRGBA, gr_c2, c1, SkXfermode::kSrc_Mode, kRGBA, gr_c1 },
{ kA, gr_c1, c1, SkXfermode::kSrc_Mode, kRGBA, gr_c1 },
// A color filtered with SrcOver produces a color.
{ kRGBA, gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kSrcOver_Mode, kRGBA, GrColorPackRGBA(164, 164, 164, 192)},
// An unknown color with known alpha filtered with SrcOver produces an unknown color with known alpha.
{ kA , gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kSrcOver_Mode, kA , GrColorPackRGBA(0, 0, 0, 192)},
// A color with unknown alpha filtered with SrcOver produces a color with unknown alpha.
{ kRGB , gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kSrcOver_Mode, kRGB, GrColorPackRGBA(164, 164, 164, 0)},
// A color filtered with DstOver produces a color.
{ kRGBA, gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kDstOver_Mode, kRGBA, GrColorPackRGBA(178, 178, 178, 192)},
// An unknown color with known alpha filtered with DstOver produces an unknown color with known alpha.
{ kA , gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kDstOver_Mode, kA , GrColorPackRGBA(0, 0, 0, 192)},
// A color with unknown alpha filtered with DstOver produces an unknown color.
{ kRGB , gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kDstOver_Mode, 0 , gr_black},
// An unknown color with known alpha and red component filtered with Multiply produces an unknown color with known red and alpha.
{ kR|kA , gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kModulate_Mode, kR|kA, GrColorPackRGBA(50, 0, 0, 64) }
};
GrPaint paint;
for (size_t i = 0; i < SK_ARRAY_COUNT(filterTests); ++i) {
const GetConstantComponentTestCase& test = filterTests[i];
SkAutoTUnref<SkColorFilter> cf(SkColorFilter::CreateModeFilter(test.filterColor, test.filterMode));
SkTDArray<const GrFragmentProcessor*> array;
bool hasFrag = cf->asFragmentProcessors(grContext, paint.getProcessorDataManager(), &array);
REPORTER_ASSERT(reporter, hasFrag);
REPORTER_ASSERT(reporter, 1 == array.count());
GrInvariantOutput inout(test.inputColor,
static_cast<GrColorComponentFlags>(test.inputComponents),
false);
array[0]->computeInvariantOutput(&inout);
REPORTER_ASSERT(reporter, filterColor(inout.color(), inout.validFlags()) == test.outputColor);
REPORTER_ASSERT(reporter, test.outputComponents == inout.validFlags());
array[0]->unref();
}
}
static void test_getConstantColorComponents(skiatest::Reporter* reporter, GrContext* grContext) {
struct GetConstantComponentTestCase {
// "Shape drawn with"
uint32_t inputComponents; // "rgb of", "red of", "alpha of", ...
GrColor inputColor; // "[color]"
SkColor filterColor; // "with filter color [color]"
SkXfermode::Mode filterMode; // "in mode [mode]"
// "produces"
uint32_t outputComponents; // "rgb of", "red of", "alpha of", ...
GrColor outputColor; // "[color]"
};
// Shorthands.
enum {
kR = kR_GrColorComponentFlag,
kG = kG_GrColorComponentFlag,
kB = kB_GrColorComponentFlag,
kA = kA_GrColorComponentFlag,
kRGB = kRGB_GrColorComponentFlags,
kRGBA = kRGBA_GrColorComponentFlags
};
// Note: below, SkColors are non-premultiplied, where as GrColors are premultiplied.
const SkColor c1 = SkColorSetARGB(200, 200, 200, 200);
const SkColor c2 = SkColorSetARGB(60, 60, 60, 60);
const GrColor gr_c1 = SkColor2GrColor(c1);
const GrColor gr_c2 = SkColor2GrColor(c2);
const GrColor gr_black = GrColorPackRGBA(0, 0, 0, 0);
const GrColor gr_white = GrColorPackRGBA(255, 255, 255, 255);
const GrColor gr_whiteTrans = GrColorPackRGBA(128, 128, 128, 128);
GetConstantComponentTestCase filterTests[] = {
// A color filtered with Clear produces black.
{ kRGBA, gr_white, SK_ColorBLACK, SkXfermode::kClear_Mode, kRGBA, gr_black },
{ kRGBA, gr_c1, SK_ColorWHITE, SkXfermode::kClear_Mode, kRGBA, gr_black },
{ kR, gr_white, c1, SkXfermode::kClear_Mode, kRGBA, gr_black },
// A color filtered with a color in mode Src, produces the filter color.
{ kRGBA, gr_c2, c1, SkXfermode::kSrc_Mode, kRGBA, gr_c1 },
{ kA, gr_c1, c1, SkXfermode::kSrc_Mode, kRGBA, gr_c1 },
// A color filtered with SrcOver produces a color.
{ kRGBA, gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kSrcOver_Mode, kRGBA, GrColorPackRGBA(164, 164, 164, 192)},
// An unknown color with known alpha filtered with SrcOver produces an unknown color with known alpha.
{ kA , gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kSrcOver_Mode, kA , GrColorPackRGBA(0, 0, 0, 192)},
// A color with unknown alpha filtered with SrcOver produces a color with unknown alpha.
{ kRGB , gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kSrcOver_Mode, kRGB, GrColorPackRGBA(164, 164, 164, 0)},
// A color filtered with DstOver produces a color.
{ kRGBA, gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kDstOver_Mode, kRGBA, GrColorPackRGBA(178, 178, 178, 192)},
// An unknown color with known alpha filtered with DstOver produces an unknown color with known alpha.
{ kA , gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kDstOver_Mode, kA , GrColorPackRGBA(0, 0, 0, 192)},
// A color with unknown alpha filtered with DstOver produces an unknown color.
{ kRGB , gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kDstOver_Mode, 0 , gr_black},
// An unknown color with known alpha and red component filtered with Multiply produces an unknown color with known red and alpha.
{ kR|kA , gr_whiteTrans, SkColorSetARGB(128, 200, 200, 200), SkXfermode::kModulate_Mode, kR|kA, GrColorPackRGBA(50, 0, 0, 64) }
};
for (size_t i = 0; i < SK_ARRAY_COUNT(filterTests); ++i) {
const GetConstantComponentTestCase& test = filterTests[i];
SkAutoTUnref<SkColorFilter> cf(SkColorFilter::CreateModeFilter(test.filterColor, test.filterMode));
SkAutoTUnref<GrEffectRef> grEffect(cf->asNewEffect(grContext));
GrColor color = test.inputColor;
uint32_t components = test.inputComponents;
grEffect->get()->getConstantColorComponents(&color, &components);
REPORTER_ASSERT(reporter, filterColor(color, components) == test.outputColor);
REPORTER_ASSERT(reporter, test.outputComponents == components);
}
}
