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/*
* Copyright 2016 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 "SkColorSpace_Base.h"
#include "SkColorSpaceXform.h"
#include "SkRect.h"
#include "SkShader.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]);
}
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);
// Test BGRA input.
sk_sp<SkColorSpace> srcSpace = SkColorSpace::MakeSRGB();
sk_sp<SkColorSpace> dstSpace =
SkColorSpace::MakeRGB(SkColorSpace::kLinear_RenderTargetGamma, wideGamut);
std::unique_ptr<SkColorSpaceXform> xform = SkColorSpaceXform::New(srcSpace.get(),
dstSpace.get());
xform->apply(SkColorSpaceXform::kRGBA_F32_ColorFormat, fWideGamutColors0,
SkColorSpaceXform::kBGRA_8888_ColorFormat, colors, kNumColors,
kOpaque_SkAlphaType);
// Test F32 input.
srcSpace = as_CSB(srcSpace)->makeLinearGamma();
xform = SkColorSpaceXform::New(srcSpace.get(), dstSpace.get());
xform->apply(SkColorSpaceXform::kRGBA_F32_ColorFormat, fWideGamutColors1,
SkColorSpaceXform::kRGBA_F32_ColorFormat, fSRGBColors, kNumColors,
kOpaque_SkAlphaType);
}
SkString onShortName() override {
return SkString("colorspacexform");
}
SkISize onISize() override {
return SkISize::Make(500, 300);
}
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++) {
auto space = SkColorSpace::MakeSRGBLinear();
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(fWideGamutColors0);
canvas->translate(0.0f, 100.0f);
drawColors(fWideGamutColors1);
}
private:
static constexpr int kNumColors = 10;
SkColor4f fSRGBColors[kNumColors];
SkColor4f fWideGamutColors0[kNumColors];
SkColor4f fWideGamutColors1[kNumColors];
typedef skiagm::GM INHERITED;
};
DEF_GM(return new ColorSpaceXformGM;)
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