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 10 namespace skiagm { 11 12 // Draw various width thin rects at 1/8 horizontal pixel increments 13 class ThinRectsGM : public GM { 14 public: ThinRectsGM()15 ThinRectsGM() { 16 this->setBGColor(0xFF000000); 17 } 18 19 protected: onShortName()20 SkString onShortName() override { 21 return SkString("thinrects"); 22 } 23 onISize()24 SkISize onISize() override { 25 return SkISize::Make(240, 320); 26 } 27 onDraw(SkCanvas * canvas)28 void onDraw(SkCanvas* canvas) override { 29 30 SkPaint white; 31 white.setColor(SK_ColorWHITE); 32 white.setAntiAlias(true); 33 34 SkPaint green; 35 green.setColor(SK_ColorGREEN); 36 green.setAntiAlias(true); 37 38 for (int i = 0; i < 8; ++i) { 39 canvas->save(); 40 canvas->translate(i*0.125f, i*40.0f); 41 DrawVertRects(canvas, white); 42 43 canvas->translate(40.0f, 0.0f); 44 DrawVertRects(canvas, green); 45 canvas->restore(); 46 47 canvas->save(); 48 canvas->translate(80.0f, i*40.0f + i*0.125f); 49 DrawHorizRects(canvas, white); 50 51 canvas->translate(40.0f, 0.0f); 52 DrawHorizRects(canvas, green); 53 canvas->restore(); 54 55 canvas->save(); 56 canvas->translate(160.0f + i*0.125f, 57 i*40.0f + i*0.125f); 58 DrawSquares(canvas, white); 59 60 canvas->translate(40.0f, 0.0f); 61 DrawSquares(canvas, green); 62 canvas->restore(); 63 } 64 } 65 66 private: DrawVertRects(SkCanvas * canvas,const SkPaint & p)67 static void DrawVertRects(SkCanvas* canvas, const SkPaint& p) { 68 constexpr SkRect vertRects[] = { 69 { 1, 1, 5.0f, 21 }, // 4 pix wide 70 { 8, 1, 10.0f, 21 }, // 2 pix wide 71 { 13, 1, 14.0f, 21 }, // 1 pix wide 72 { 17, 1, 17.5f, 21 }, // 1/2 pix wide 73 { 21, 1, 21.25f, 21 }, // 1/4 pix wide 74 { 25, 1, 25.125f, 21 }, // 1/8 pix wide 75 { 29, 1, 29.0f, 21 } // 0 pix wide 76 }; 77 78 for (size_t j = 0; j < SK_ARRAY_COUNT(vertRects); ++j) { 79 canvas->drawRect(vertRects[j], p); 80 } 81 } 82 DrawHorizRects(SkCanvas * canvas,const SkPaint & p)83 static void DrawHorizRects(SkCanvas* canvas, const SkPaint& p) { 84 constexpr SkRect horizRects[] = { 85 { 1, 1, 21, 5.0f }, // 4 pix high 86 { 1, 8, 21, 10.0f }, // 2 pix high 87 { 1, 13, 21, 14.0f }, // 1 pix high 88 { 1, 17, 21, 17.5f }, // 1/2 pix high 89 { 1, 21, 21, 21.25f }, // 1/4 pix high 90 { 1, 25, 21, 25.125f }, // 1/8 pix high 91 { 1, 29, 21, 29.0f } // 0 pix high 92 }; 93 94 for (size_t j = 0; j < SK_ARRAY_COUNT(horizRects); ++j) { 95 canvas->drawRect(horizRects[j], p); 96 } 97 } 98 DrawSquares(SkCanvas * canvas,const SkPaint & p)99 static void DrawSquares(SkCanvas* canvas, const SkPaint& p) { 100 constexpr SkRect squares[] = { 101 { 1, 1, 5.0f, 5.0f }, // 4 pix 102 { 8, 8, 10.0f, 10.0f }, // 2 pix 103 { 13, 13, 14.0f, 14.0f }, // 1 pix 104 { 17, 17, 17.5f, 17.5f }, // 1/2 pix 105 { 21, 21, 21.25f, 21.25f }, // 1/4 pix 106 { 25, 25, 25.125f, 25.125f }, // 1/8 pix 107 { 29, 29, 29.0f, 29.0f } // 0 pix 108 }; 109 110 for (size_t j = 0; j < SK_ARRAY_COUNT(squares); ++j) { 111 canvas->drawRect(squares[j], p); 112 } 113 } 114 115 typedef GM INHERITED; 116 }; 117 118 ////////////////////////////////////////////////////////////////////////////// 119 120 DEF_GM( return new ThinRectsGM; ) 121 122 } 123