| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm.h" |
| #include "SkColor.h" |
| #include "SkColorSpaceXform.h" |
| #include "SkRect.h" |
| |
| class ColorSpaceXformGM : public skiagm::GM { |
| public: |
| ColorSpaceXformGM() {} |
| |
| protected: |
| void onOnceBeforeDraw() override { |
| SkColor colors[] = { |
| SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorMAGENTA, SK_ColorCYAN, SK_ColorYELLOW, |
| SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorMAGENTA, |
| }; |
| static_assert(kNumColors == SK_ARRAY_COUNT(colors), "Fix number of colors."); |
| |
| for (int i = 0; i < kNumColors; i++) { |
| fSRGBColors[i] = SkColor4f::FromColor(colors[i]); |
| |
| // FIXME (msarett): SkColorSpaceXform does not support BGRA. |
| colors[i] = SkSwizzle_RB(colors[i]); |
| } |
| |
| static constexpr float kWideGamutRGB_toXYZD50[]{ |
| 0.7161046f, 0.1009296f, 0.1471858f, |
| 0.2581874f, 0.7249378f, 0.0168748f, |
| 0.0000000f, 0.0517813f, 0.7734287f, |
| }; |
| |
| SkMatrix44 wideGamut(SkMatrix44::kUninitialized_Constructor); |
| wideGamut.set3x3RowMajorf(kWideGamutRGB_toXYZD50); |
| |
| sk_sp<SkColorSpace> srcSpace = SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named); |
| sk_sp<SkColorSpace> dstSpace = |
| SkColorSpace::NewRGB(SkColorSpace::kLinear_RenderTargetGamma, wideGamut); |
| std::unique_ptr<SkColorSpaceXform> xform = SkColorSpaceXform::New(srcSpace.get(), |
| dstSpace.get()); |
| |
| xform->apply(fWideGamutColors, colors, kNumColors, |
| SkColorSpaceXform::kRGBA_F32_ColorFormat, kOpaque_SkAlphaType); |
| } |
| |
| SkString onShortName() override { |
| return SkString("colorspacexform"); |
| } |
| |
| SkISize onISize() override { |
| return SkISize::Make(500, 200); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| auto drawColors = [canvas](SkColor4f* colors) { |
| SkRect r = SkRect::MakeXYWH(0.0f, 0.0f, 50.0f, 100.0f); |
| |
| canvas->save(); |
| for (int i = 0; i < kNumColors; i++) { |
| sk_sp<SkColorSpace> space = |
| SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named)->makeLinearGamma(); |
| sk_sp<SkShader> s = SkShader::MakeColorShader(colors[i], space); |
| SkPaint paint; |
| paint.setShader(s); |
| canvas->drawRect(r, paint); |
| canvas->translate(50.0f, 0.0f); |
| } |
| canvas->restore(); |
| }; |
| |
| // Wide gamut colors should appear darker - we are simulating a more intense display. |
| drawColors(fSRGBColors); |
| canvas->translate(0.0f, 100.0f); |
| drawColors(fWideGamutColors); |
| } |
| |
| private: |
| static constexpr int kNumColors = 10; |
| |
| SkColor4f fSRGBColors[kNumColors]; |
| SkColor4f fWideGamutColors[kNumColors]; |
| |
| typedef skiagm::GM INHERITED; |
| }; |
| |
| DEF_GM(return new ColorSpaceXformGM;) |