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Skia Fiddle
Skia Version:
3d1a3b
void draw(SkCanvas* canvas) { const char* colors[] = { "Unknown", "Alpha_8", "RGB_565", "ARGB_4444", "RGBA_8888", "RGB_888x", "BGRA_8888", "RGBA_1010102", "RGB_101010x", "Gray_8", "RGBA_F16Norm", "RGBA_F16" }; const char* alphas[] = {"Unknown ", "Opaque ", "Premul ", "Unpremul"}; SkAlphaType alphaTypes[] = { kUnknown_SkAlphaType, kOpaque_SkAlphaType, kPremul_SkAlphaType, kUnpremul_SkAlphaType }; SkPaint paint; SkFont font(SkTypeface::MakeFromName("monospace", SkFontStyle()), 10); int y = 15; canvas->drawString(" colorType alphaType canonical", 10, y, font, paint); for (SkColorType colorType : { kUnknown_SkColorType, kAlpha_8_SkColorType, kRGB_565_SkColorType, kARGB_4444_SkColorType, kRGBA_8888_SkColorType, kRGB_888x_SkColorType, kBGRA_8888_SkColorType, kRGBA_1010102_SkColorType, kRGB_101010x_SkColorType, kGray_8_SkColorType, kRGBA_F16_SkColorType } ) { for (SkAlphaType alphaType : alphaTypes) { SkAlphaType canonicalAlphaType = kUnknown_SkAlphaType; bool result = SkColorTypeValidateAlphaType(colorType, alphaType, &canonicalAlphaType); SkString string; string.printf("%13s %10s %10s", colors[(int) colorType], alphas[(int) alphaType], result ? alphas[(int) canonicalAlphaType] : "------ "); canvas->drawString(string, 10, y += 14, font, paint); } } }
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