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/gm.h" 9 #include "include/core/SkCanvas.h" 10 #include "include/core/SkColor.h" 11 #include "include/core/SkPaint.h" 12 #include "include/core/SkPoint.h" 13 #include "include/core/SkScalar.h" 14 #include "include/core/SkSize.h" 15 #include "include/core/SkString.h" 16 #include "include/utils/SkRandom.h" 17 18 #include <stddef.h> 19 20 namespace skiagm { 21 22 class PointsGM : public GM { 23 public: PointsGM()24 PointsGM() {} 25 26 protected: 27 onShortName()28 SkString onShortName() override { 29 return SkString("points"); 30 } 31 onISize()32 SkISize onISize() override { 33 return SkISize::Make(640, 490); 34 } 35 fill_pts(SkPoint pts[],size_t n,SkRandom * rand)36 static void fill_pts(SkPoint pts[], size_t n, SkRandom* rand) { 37 for (size_t i = 0; i < n; i++) { 38 // Compute these independently and store in variables, rather 39 // than in the parameter-passing expression, to get consistent 40 // evaluation order across compilers. 41 SkScalar y = rand->nextUScalar1() * 480; 42 SkScalar x = rand->nextUScalar1() * 640; 43 pts[i].set(x, y); 44 } 45 } 46 onDraw(SkCanvas * canvas)47 void onDraw(SkCanvas* canvas) override { 48 canvas->translate(SK_Scalar1, SK_Scalar1); 49 50 SkRandom rand; 51 SkPaint p0, p1, p2, p3; 52 const size_t n = 99; 53 54 p0.setColor(SK_ColorRED); 55 p1.setColor(SK_ColorGREEN); 56 p2.setColor(SK_ColorBLUE); 57 p3.setColor(SK_ColorWHITE); 58 59 p0.setStrokeWidth(SkIntToScalar(4)); 60 p2.setStrokeCap(SkPaint::kRound_Cap); 61 p2.setStrokeWidth(SkIntToScalar(6)); 62 63 SkPoint* pts = new SkPoint[n]; 64 fill_pts(pts, n, &rand); 65 66 canvas->drawPoints(SkCanvas::kPolygon_PointMode, n, pts, p0); 67 canvas->drawPoints(SkCanvas::kLines_PointMode, n, pts, p1); 68 canvas->drawPoints(SkCanvas::kPoints_PointMode, n, pts, p2); 69 canvas->drawPoints(SkCanvas::kPoints_PointMode, n, pts, p3); 70 71 delete[] pts; 72 } 73 74 private: 75 using INHERITED = GM; 76 }; 77 DEF_GM( return new PointsGM; ) 78 } // namespace skiagm 79 80 #include "include/core/SkMaskFilter.h" 81 82 DEF_SIMPLE_GM(points_maskfilter, canvas, 512, 256) { 83 constexpr int N = 30; 84 SkPoint pts[N]; 85 86 SkRandom rand; 87 for (SkPoint& p : pts) { 88 p.fX = rand.nextF() * 220 + 18; 89 p.fY = rand.nextF() * 220 + 18; 90 } 91 92 auto mf = SkMaskFilter::MakeBlur(kNormal_SkBlurStyle, 6); 93 const SkPaint::Cap caps[] = { SkPaint::kSquare_Cap, SkPaint::kRound_Cap }; 94 95 SkPaint paint; 96 paint.setAntiAlias(true); 97 paint.setStroke(true); 98 paint.setStrokeWidth(10); 99 100 for (auto cap : caps) { 101 paint.setStrokeCap(cap); 102 103 paint.setMaskFilter(mf); 104 paint.setColor(SK_ColorBLACK); 105 canvas->drawPoints(SkCanvas::kPoints_PointMode, N, pts, paint); 106 107 paint.setMaskFilter(nullptr); 108 paint.setColor(SK_ColorRED); 109 canvas->drawPoints(SkCanvas::kPoints_PointMode, N, pts, paint); 110 111 canvas->translate(256, 0); 112 } 113 } 114