1 /* 2 * Copyright 2015 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 "SkCanvas.h" 10 #include "SkRRect.h" 11 #include "SkPath.h" 12 13 class ScaledStrokesGM : public skiagm::GM { 14 public: ScaledStrokesGM()15 ScaledStrokesGM() {} 16 17 protected: 18 onShortName()19 SkString onShortName() override { 20 return SkString("scaledstrokes"); 21 } 22 onISize()23 SkISize onISize() override { 24 return SkISize::Make(640, 320); 25 } 26 draw_path(SkScalar size,SkCanvas * canvas,SkPaint paint)27 static void draw_path(SkScalar size, SkCanvas* canvas, SkPaint paint) { 28 SkScalar c = 0.551915024494f * size; 29 SkPath path; 30 path.moveTo(0.0f, size); 31 path.cubicTo(c, size, size, c, size, 0.0f); 32 path.cubicTo(size, -c, c, -size, 0.0f, -size); 33 path.cubicTo(-c, -size, -size, -c, -size, 0.0f); 34 path.cubicTo(-size, c, -c, size, 0.0f, size); 35 canvas->drawPath(path, paint); 36 } 37 onDraw(SkCanvas * canvas)38 void onDraw(SkCanvas* canvas) override { 39 SkPaint paint; 40 SkPath path; 41 paint.setStyle(SkPaint::Style::kStroke_Style); 42 canvas->translate(5.0f, 5.0f); 43 const SkScalar size = 60.0f; 44 for (int i = 0; i < 2; i++) { 45 paint.setAntiAlias(i == 1); 46 for (int j = 0; j < 4; j++) { 47 SkScalar scale = 4.0f - j; 48 paint.setStrokeWidth(4.0f / scale); 49 canvas->save(); 50 canvas->translate(size / 2.0f, size / 2.0f); 51 canvas->scale(scale, scale); 52 draw_path(size / 2.0f / scale, canvas, paint); 53 canvas->restore(); 54 55 canvas->save(); 56 canvas->translate(size / 2.0f, 80.0f + size / 2.0f); 57 canvas->scale(scale, scale); 58 canvas->drawCircle(0.0f, 0.0f, size / 2.0f / scale, paint); 59 canvas->restore(); 60 61 canvas->save(); 62 canvas->translate(0.0f, 160.0f); 63 canvas->scale(scale, scale); 64 canvas->drawRect(SkRect::MakeXYWH(0.0f, 0.0f, size / scale, size / scale), paint); 65 canvas->restore(); 66 67 canvas->save(); 68 canvas->translate(0.0f, 240.0f); 69 canvas->scale(scale, scale); 70 canvas->drawLine(0.0f, 0.0f, size / scale, size / scale, paint); 71 canvas->restore(); 72 73 canvas->translate(80.0f, 0.0f); 74 } 75 } 76 77 } 78 79 private: 80 typedef GM INHERITED; 81 }; 82 83 DEF_GM( return new ScaledStrokesGM; ) 84