eec8304714
Gradients (and other shaders) are going to end up serializing this particular color space very frequently, so we want a shorthand way of writing it out. I think it's also helpful to have a clearer way of creating it (vs. NewNamed(kSRGB_Named)->makeLinearGamma()). BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2377763002 Review-Url: https://codereview.chromium.org/2377763002
89 lines
2.9 KiB
C++
89 lines
2.9 KiB
C++
/*
|
|
* 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]);
|
|
}
|
|
|
|
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,
|
|
SkColorSpaceXform::kBGRA_8888_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::kSRGBLinear_Named);
|
|
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;)
|