зеркало из https://github.com/mozilla/moz-skia.git
84 строки
2.1 KiB
C++
84 строки
2.1 KiB
C++
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/*
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* Copyright 2012 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "SkCanvas.h"
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#include "SkComposeShader.h"
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#include "SkGradientShader.h"
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#include "SkGraphics.h"
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#include "SkShader.h"
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#include "SkString.h"
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#include "SkXfermode.h"
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namespace skiagm {
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class ShaderGM : public GM {
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public:
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ShaderGM() {
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SkPoint pts[2];
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SkColor colors[2];
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pts[0].set(0, 0);
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pts[1].set(SkIntToScalar(100), 0);
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colors[0] = SK_ColorRED;
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colors[1] = SK_ColorBLUE;
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SkShader* shaderA = SkGradientShader::CreateLinear(pts, colors, NULL, 2,
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SkShader::kClamp_TileMode);
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pts[0].set(0, 0);
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pts[1].set(0, SkIntToScalar(100));
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colors[0] = SK_ColorBLACK;
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colors[1] = SkColorSetARGB(0x80, 0, 0, 0);
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SkShader* shaderB = SkGradientShader::CreateLinear(pts, colors, NULL, 2,
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SkShader::kClamp_TileMode);
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SkXfermode* mode = SkXfermode::Create(SkXfermode::kDstIn_Mode);
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fShader = new SkComposeShader(shaderA, shaderB, mode);
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shaderA->unref();
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shaderB->unref();
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mode->unref();
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}
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virtual ~ShaderGM() {
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SkSafeUnref(fShader);
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}
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protected:
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virtual SkString onShortName() SK_OVERRIDE {
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return SkString("composeshader");
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}
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virtual SkISize onISize() SK_OVERRIDE {
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return make_isize(640, 480);
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}
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virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
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SkPaint paint;
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paint.setColor(SK_ColorGREEN);
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canvas->drawRectCoords(0, 0, SkIntToScalar(100), SkIntToScalar(100), paint);
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paint.setShader(fShader);
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canvas->drawRectCoords(0, 0, SkIntToScalar(100), SkIntToScalar(100), paint);
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}
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private:
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SkShader* fShader;
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typedef GM INHERITED ;
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};
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//////////////////////////////////////////////////////////////////////////////
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static GM* MyFactory(void*) { return new ShaderGM; }
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static GMRegistry reg(MyFactory);
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} // namespace
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