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/*
* Copyright 2014 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 "SkCanvas.h"
#include "SkColorMatrixFilter.h"
#include "SkGradientShader.h"
static sk_sp<SkShader> make_shader(const SkRect& bounds) {
const SkPoint pts[] = {
{ bounds.left(), bounds.top() },
{ bounds.right(), bounds.bottom() },
};
const SkColor colors[] = {
SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorBLACK,
SK_ColorCYAN, SK_ColorMAGENTA, SK_ColorYELLOW,
};
return SkGradientShader::MakeLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors),
SkShader::kClamp_TileMode);
}
typedef void (*InstallPaint)(SkPaint*, uint32_t, uint32_t);
static void install_nothing(SkPaint* paint, uint32_t, uint32_t) {
paint->setColorFilter(nullptr);
}
static void install_lighting(SkPaint* paint, uint32_t mul, uint32_t add) {
paint->setColorFilter(SkColorMatrixFilter::MakeLightingFilter(mul, add));
}
class ColorFiltersGM : public skiagm::GM {
public:
ColorFiltersGM() {
fName.set("lightingcolorfilter");
}
protected:
virtual SkString onShortName() override {
return fName;
}
virtual SkISize onISize() override {
return SkISize::Make(620, 430);
}
void onDraw(SkCanvas* canvas) override {
SkPaint paint;
SkRect r;
r.setWH(600, 50);
paint.setShader(make_shader(r));
const struct {
InstallPaint fProc;
uint32_t fData0, fData1;
} rec[] = {
{ install_nothing, 0, 0 },
{ install_lighting, 0xFF0000, 0 },
{ install_lighting, 0x00FF00, 0 },
{ install_lighting, 0x0000FF, 0 },
{ install_lighting, 0x000000, 0xFF0000 },
{ install_lighting, 0x000000, 0x00FF00 },
{ install_lighting, 0x000000, 0x0000FF },
};
canvas->translate(10, 10);
for (size_t i = 0; i < SK_ARRAY_COUNT(rec); ++i) {
rec[i].fProc(&paint, rec[i].fData0, rec[i].fData1);
canvas->drawRect(r, paint);
canvas->translate(0, r.height() + 10);
}
}
private:
SkString fName;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new ColorFiltersGM;)
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