1 /* 2 * Copyright 2011 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 #include "SkPath.h" 11 12 namespace skiagm { 13 14 class FillTypePerspGM : public GM { 15 SkPath fPath; 16 public: FillTypePerspGM()17 FillTypePerspGM() {} 18 makePath()19 void makePath() { 20 if (fPath.isEmpty()) { 21 const SkScalar radius = SkIntToScalar(45); 22 fPath.addCircle(SkIntToScalar(50), SkIntToScalar(50), radius); 23 fPath.addCircle(SkIntToScalar(100), SkIntToScalar(100), radius); 24 } 25 } 26 27 protected: 28 onShortName()29 SkString onShortName() override { 30 return SkString("filltypespersp"); 31 } 32 onISize()33 SkISize onISize() override { 34 return SkISize::Make(835, 840); 35 } 36 showPath(SkCanvas * canvas,int x,int y,SkPath::FillType ft,SkScalar scale,const SkPaint & paint)37 void showPath(SkCanvas* canvas, int x, int y, SkPath::FillType ft, 38 SkScalar scale, const SkPaint& paint) { 39 const SkRect r = { 0, 0, SkIntToScalar(150), SkIntToScalar(150) }; 40 41 canvas->save(); 42 canvas->translate(SkIntToScalar(x), SkIntToScalar(y)); 43 canvas->clipRect(r); 44 canvas->drawColor(SK_ColorWHITE); 45 fPath.setFillType(ft); 46 canvas->translate(r.centerX(), r.centerY()); 47 canvas->scale(scale, scale); 48 canvas->translate(-r.centerX(), -r.centerY()); 49 canvas->drawPath(fPath, paint); 50 canvas->restore(); 51 } 52 showFour(SkCanvas * canvas,SkScalar scale,bool aa)53 void showFour(SkCanvas* canvas, SkScalar scale, bool aa) { 54 SkPaint paint; 55 SkPoint center = SkPoint::Make(SkIntToScalar(100), SkIntToScalar(100)); 56 SkColor colors[] = {SK_ColorBLUE, SK_ColorRED, SK_ColorGREEN}; 57 SkScalar pos[] = {0, SK_ScalarHalf, SK_Scalar1}; 58 paint.setShader(SkGradientShader::MakeRadial(center, 59 SkIntToScalar(100), 60 colors, 61 pos, 62 SK_ARRAY_COUNT(colors), 63 SkShader::kClamp_TileMode)); 64 paint.setAntiAlias(aa); 65 66 showPath(canvas, 0, 0, SkPath::kWinding_FillType, 67 scale, paint); 68 showPath(canvas, 200, 0, SkPath::kEvenOdd_FillType, 69 scale, paint); 70 showPath(canvas, 00, 200, SkPath::kInverseWinding_FillType, 71 scale, paint); 72 showPath(canvas, 200, 200, SkPath::kInverseEvenOdd_FillType, 73 scale, paint); 74 } 75 onDraw(SkCanvas * canvas)76 void onDraw(SkCanvas* canvas) override { 77 this->makePath(); 78 79 // do perspective drawPaint as the background; 80 SkPaint bkgnrd; 81 SkPoint center = SkPoint::Make(SkIntToScalar(100), 82 SkIntToScalar(100)); 83 SkColor colors[] = {SK_ColorBLACK, SK_ColorCYAN, 84 SK_ColorYELLOW, SK_ColorWHITE}; 85 SkScalar pos[] = {0, SK_ScalarHalf / 2, 86 3 * SK_ScalarHalf / 2, SK_Scalar1}; 87 bkgnrd.setShader(SkGradientShader::MakeRadial(center, 88 SkIntToScalar(1000), 89 colors, 90 pos, 91 SK_ARRAY_COUNT(colors), 92 SkShader::kClamp_TileMode)); 93 canvas->save(); 94 canvas->translate(SkIntToScalar(100), SkIntToScalar(100)); 95 SkMatrix mat; 96 mat.reset(); 97 mat.setPerspY(SK_Scalar1 / 1000); 98 canvas->concat(mat); 99 canvas->drawPaint(bkgnrd); 100 canvas->restore(); 101 102 // draw the paths in perspective 103 SkMatrix persp; 104 persp.reset(); 105 persp.setPerspX(-SK_Scalar1 / 1800); 106 persp.setPerspY(SK_Scalar1 / 500); 107 canvas->concat(persp); 108 109 canvas->translate(SkIntToScalar(20), SkIntToScalar(20)); 110 const SkScalar scale = SkIntToScalar(5)/4; 111 112 showFour(canvas, SK_Scalar1, false); 113 canvas->translate(SkIntToScalar(450), 0); 114 showFour(canvas, scale, false); 115 116 canvas->translate(SkIntToScalar(-450), SkIntToScalar(450)); 117 showFour(canvas, SK_Scalar1, true); 118 canvas->translate(SkIntToScalar(450), 0); 119 showFour(canvas, scale, true); 120 } 121 122 private: 123 typedef GM INHERITED; 124 }; 125 126 ////////////////////////////////////////////////////////////////////////////// 127 128 DEF_GM( return new FillTypePerspGM; ) 129 130 } 131