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/*
* Copyright 2012 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 "SkGradientShader.h"
namespace skiagm {
static sk_sp<SkShader> MakeLinear(SkScalar width, SkScalar height, bool alternate,
const SkMatrix& localMatrix) {
SkPoint pts[2] = { {0, 0}, {width, height}};
SkColor colors[2] = {SK_ColorRED, SK_ColorGREEN};
if (alternate) {
pts[1].fY = 0;
colors[0] = SK_ColorBLUE;
colors[1] = SK_ColorYELLOW;
}
return SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkShader::kClamp_TileMode,
0, &localMatrix);
}
///////////////////////////////////////////////////////////////////////////////
class ShaderBoundsGM : public GM {
public:
typedef sk_sp<SkShader> (*ShaderGenFunc)(SkScalar width, SkScalar height,
bool alternate, const SkMatrix& localMatrix);
ShaderBoundsGM(ShaderGenFunc maker, const SkString& name)
: fShaderMaker(maker),
fName(name) {
}
protected:
SkString onShortName() override {
return fName;
}
SkISize onISize() override { return SkISize::Make(320, 240); }
SkMatrix onGetInitialTransform() const override {
SkMatrix result;
SkScalar scale = 0.8f;
result.setScale(scale, scale);
result.postTranslate(SkIntToScalar(7), SkIntToScalar(23));
return result;
}
void onDraw(SkCanvas* canvas) override {
// The PDF device has already clipped to the content area, but we
// do it again here so that the raster and pdf results are consistent.
canvas->clipRect(SkRect::MakeWH(SkIntToScalar(320),
SkIntToScalar(240)));
SkMatrix canvasScale;
SkScalar scale = 0.7f;
canvasScale.setScale(scale, scale);
canvas->concat(canvasScale);
// Background shader.
SkPaint paint;
paint.setShader(MakeShader(559, 387, false));
SkRect r = SkRect::MakeXYWH(SkIntToScalar(-12), SkIntToScalar(-41),
SkIntToScalar(571), SkIntToScalar(428));
canvas->drawRect(r, paint);
// Constrained shader.
paint.setShader(MakeShader(101, 151, true));
r = SkRect::MakeXYWH(SkIntToScalar(43), SkIntToScalar(71),
SkIntToScalar(101), SkIntToScalar(151));
canvas->clipRect(r);
canvas->drawRect(r, paint);
}
sk_sp<SkShader> MakeShader(int width, int height, bool background) {
SkScalar scale = 0.5f;
if (background) {
scale = 0.6f;
}
SkScalar shaderWidth = width / scale;
SkScalar shaderHeight = height / scale;
SkMatrix shaderScale = SkMatrix::MakeScale(scale);
return fShaderMaker(shaderWidth, shaderHeight, background, shaderScale);
}
private:
typedef GM INHERITED;
ShaderGenFunc fShaderMaker;
SkString fName;
sk_sp<SkShader> MakeShader(bool background);
};
///////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) {
return new ShaderBoundsGM(MakeLinear, SkString("shaderbounds_linear"));
}
static GMRegistry reg(MyFactory);
}
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