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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 SkShader* MakeLinear(SkScalar width, SkScalar height, bool alternate) {
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::CreateLinear(pts, colors, NULL, 2,
SkShader::kClamp_TileMode, NULL);
}
///////////////////////////////////////////////////////////////////////////////
class ShaderBoundsGM : public GM {
public:
typedef SkShader* (*ShaderGenFunc)(SkScalar width, SkScalar height,
bool alternate);
ShaderBoundsGM(ShaderGenFunc maker, const SkString& name)
: fShaderMaker(maker),
fName(name) {
}
protected:
SkString onShortName() {
return fName;
}
virtual SkISize onISize() { return make_isize(320, 240); }
virtual SkMatrix onGetInitialTransform() const SK_OVERRIDE {
SkMatrix result;
SkScalar scale = SkFloatToScalar(0.8f);
result.setScale(scale, scale);
result.postTranslate(SkIntToScalar(7), SkIntToScalar(23));
return result;
}
virtual void onDraw(SkCanvas* canvas) {
// 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 = SkFloatToScalar(0.7f);
canvasScale.setScale(scale, scale);
canvas->concat(canvasScale);
// Background shader.
SkPaint paint;
paint.setShader(MakeShader(559, 387, false))->unref();
SkRect r = SkRect::MakeXYWH(SkIntToScalar(-12), SkIntToScalar(-41),
SkIntToScalar(571), SkIntToScalar(428));
canvas->drawRect(r, paint);
// Constrained shader.
paint.setShader(MakeShader(101, 151, true))->unref();
r = SkRect::MakeXYWH(SkIntToScalar(43), SkIntToScalar(71),
SkIntToScalar(101), SkIntToScalar(151));
canvas->clipRect(r);
canvas->drawRect(r, paint);
}
SkShader* MakeShader(int width, int height, bool background) {
SkScalar scale = SkFloatToScalar(0.5f);
if (background) {
scale = SkFloatToScalar(0.6f);
}
SkScalar shaderWidth = SkScalarDiv(SkIntToScalar(width), scale);
SkScalar shaderHeight = SkScalarDiv(SkIntToScalar(height), scale);
SkShader* shader = fShaderMaker(shaderWidth, shaderHeight, background);
SkMatrix shaderScale;
shaderScale.setScale(scale, scale);
shader->setLocalMatrix(shaderScale);
return shader;
}
private:
typedef GM INHERITED;
ShaderGenFunc fShaderMaker;
SkString fName;
SkShader* MakeShader(bool background);
};
///////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) {
return new ShaderBoundsGM(MakeLinear, SkString("shaderbounds_linear"));
}
static GMRegistry reg(MyFactory);
}
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