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