/* * Copyright 2013 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" using namespace skiagm; struct GradData { int fCount; const SkColor* fColors; const SkScalar* fPos; }; constexpr SkColor gColors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, }; //constexpr SkScalar gPos[] = { SK_Scalar1*999/2000, SK_Scalar1*1001/2000 }; constexpr GradData gGradData[] = { { 40, gColors, nullptr }, // { 2, gColors, gPos }, // { 2, gCol2, nullptr }, }; static sk_sp<SkShader> MakeLinear(const SkPoint pts[2], const GradData& data, SkTileMode tm) { return SkGradientShader::MakeLinear(pts, data.fColors, data.fPos, data.fCount, tm); } static sk_sp<SkShader> MakeRadial(const SkPoint pts[2], const GradData& data, SkTileMode tm) { const SkPoint pt{ SkScalarAve(pts[0].fX, pts[1].fX), SkScalarAve(pts[0].fY, pts[1].fY) }; return SkGradientShader::MakeRadial(pt, pt.fX, data.fColors, data.fPos, data.fCount, tm); } static sk_sp<SkShader> MakeSweep(const SkPoint pts[2], const GradData& data, SkTileMode) { const SkPoint pt{ SkScalarAve(pts[0].fX, pts[1].fX), SkScalarAve(pts[0].fY, pts[1].fY) }; return SkGradientShader::MakeSweep(pt.fX, pt.fY, data.fColors, data.fPos, data.fCount); } typedef sk_sp<SkShader> (*GradMaker)(const SkPoint pts[2], const GradData&, SkTileMode); constexpr GradMaker gGradMakers[] = { MakeLinear, MakeRadial, MakeSweep, }; /////////////////////////////////////////////////////////////////////////////// class GradientsGM : public GM { public: GradientsGM() { this->setBGColor(0xFFDDDDDD); } protected: SkString onShortName() override { return SkString("gradient_dirty_laundry"); } SkISize onISize() override { return SkISize::Make(640, 615); } void onDraw(SkCanvas* canvas) override { SkPoint pts[2] = { { 0, 0 }, { SkIntToScalar(100), SkIntToScalar(100) } }; SkTileMode tm = SkTileMode::kClamp; SkRect r = { 0, 0, SkIntToScalar(100), SkIntToScalar(100) }; SkPaint paint; paint.setAntiAlias(true); canvas->translate(SkIntToScalar(20), SkIntToScalar(20)); for (size_t i = 0; i < SK_ARRAY_COUNT(gGradData); i++) { canvas->save(); for (size_t j = 0; j < SK_ARRAY_COUNT(gGradMakers); j++) { paint.setShader(gGradMakers[j](pts, gGradData[i], tm)); canvas->drawRect(r, paint); canvas->translate(0, SkIntToScalar(120)); } canvas->restore(); canvas->translate(SkIntToScalar(120), 0); } } private: typedef GM INHERITED; }; /////////////////////////////////////////////////////////////////////////////// DEF_GM( return new GradientsGM; )