1/* 2 * Copyright 2013 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8#include "gm.h" 9#include "SkGradientShader.h" 10 11typedef SkShader* (*MakeShaderProc)(const SkColor[], int count, const SkSize&); 12 13static SkShader* shader_linear(const SkColor colors[], int count, const SkSize& size) { 14 SkPoint pts[] = { { 0, 0 }, { size.width(), size.height() } }; 15 return SkGradientShader::CreateLinear(pts, colors, NULL, count, 16 SkShader::kClamp_TileMode); 17} 18 19static SkShader* shader_radial(const SkColor colors[], int count, const SkSize& size) { 20 SkPoint center = { size.width()/2, size.height()/2 }; 21 return SkGradientShader::CreateRadial(center, size.width()/2, colors, NULL, count, 22 SkShader::kClamp_TileMode); 23} 24 25static SkShader* shader_conical(const SkColor colors[], int count, const SkSize& size) { 26 SkPoint center = { size.width()/2, size.height()/2 }; 27 return SkGradientShader::CreateTwoPointConical(center, size.width()/64, 28 center, size.width()/2, 29 colors, NULL, count, 30 SkShader::kClamp_TileMode); 31} 32 33static SkShader* shader_sweep(const SkColor colors[], int count, const SkSize& size) { 34 return SkGradientShader::CreateSweep(size.width()/2, size.height()/2, 35 colors, NULL, count); 36} 37 38class ShallowGradientGM : public skiagm::GM { 39public: 40 ShallowGradientGM(MakeShaderProc proc, const char name[]) : fProc(proc) { 41 fName.printf("shallow_gradient_%s", name); 42 } 43 44protected: 45 virtual uint32_t onGetFlags() const SK_OVERRIDE { 46 if (fName.contains("linear") || fName.contains("radial")) { 47 return kSkipTiled_Flag; 48 } 49 return 0; 50 } 51 52 virtual SkString onShortName() SK_OVERRIDE { 53 return fName; 54 } 55 56 virtual SkISize onISize() SK_OVERRIDE { 57 return SkISize::Make(800, 800); 58 } 59 60 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { 61 const SkColor colors[] = { 0xFF555555, 0xFF444444 }; 62 const int colorCount = SK_ARRAY_COUNT(colors); 63 64 SkRect r = { 0, 0, this->width(), this->height() }; 65 SkSize size = SkSize::Make(r.width(), r.height()); 66 67 SkPaint paint; 68 paint.setShader(fProc(colors, colorCount, size))->unref(); 69 canvas->drawRect(r, paint); 70 } 71 72private: 73 MakeShaderProc fProc; 74 SkString fName; 75 76 typedef skiagm::GM INHERITED; 77}; 78 79/////////////////////////////////////////////////////////////////////////////// 80 81DEF_GM( return new ShallowGradientGM(shader_linear, "linear"); ) 82DEF_GM( return new ShallowGradientGM(shader_radial, "radial"); ) 83DEF_GM( return new ShallowGradientGM(shader_conical, "conical"); ) 84DEF_GM( return new ShallowGradientGM(shader_sweep, "sweep"); ) 85