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/gm.h" 9 #include "include/core/SkCanvas.h" 10 #include "include/core/SkPaint.h" 11 #include "include/core/SkPathBuilder.h" 12 #include "include/core/SkRect.h" 13 #include "include/core/SkScalar.h" 14 #include "include/core/SkSize.h" 15 #include "include/core/SkString.h" 16 17 class ScaledStrokesGM : public skiagm::GM { 18 public: ScaledStrokesGM()19 ScaledStrokesGM() {} 20 21 protected: getName() const22 SkString getName() const override { return SkString("scaledstrokes"); } 23 getISize()24 SkISize getISize() override { return SkISize::Make(640, 320); } 25 draw_path(SkScalar size,SkCanvas * canvas,SkPaint paint)26 static void draw_path(SkScalar size, SkCanvas* canvas, SkPaint paint) { 27 SkScalar c = 0.551915024494f * size; 28 SkPathBuilder path; 29 path.moveTo(0.0f, size); 30 path.cubicTo(c, size, size, c, size, 0.0f); 31 path.cubicTo(size, -c, c, -size, 0.0f, -size); 32 path.cubicTo(-c, -size, -size, -c, -size, 0.0f); 33 path.cubicTo(-size, c, -c, size, 0.0f, size); 34 canvas->drawPath(path.detach(), paint); 35 } 36 onDraw(SkCanvas * canvas)37 void onDraw(SkCanvas* canvas) override { 38 SkPaint paint; 39 SkPath path; 40 paint.setStyle(SkPaint::Style::kStroke_Style); 41 canvas->translate(5.0f, 5.0f); 42 const SkScalar size = 60.0f; 43 for (int i = 0; i < 2; i++) { 44 paint.setAntiAlias(i == 1); 45 for (int j = 0; j < 4; j++) { 46 SkScalar scale = 4.0f - j; 47 paint.setStrokeWidth(4.0f / scale); 48 canvas->save(); 49 canvas->translate(size / 2.0f, size / 2.0f); 50 canvas->scale(scale, scale); 51 draw_path(size / 2.0f / scale, canvas, paint); 52 canvas->restore(); 53 54 canvas->save(); 55 canvas->translate(size / 2.0f, 80.0f + size / 2.0f); 56 canvas->scale(scale, scale); 57 canvas->drawCircle(0.0f, 0.0f, size / 2.0f / scale, paint); 58 canvas->restore(); 59 60 canvas->save(); 61 canvas->translate(0.0f, 160.0f); 62 canvas->scale(scale, scale); 63 canvas->drawRect(SkRect::MakeXYWH(0.0f, 0.0f, size / scale, size / scale), paint); 64 canvas->restore(); 65 66 canvas->save(); 67 canvas->translate(0.0f, 240.0f); 68 canvas->scale(scale, scale); 69 canvas->drawLine(0.0f, 0.0f, size / scale, size / scale, paint); 70 canvas->restore(); 71 72 canvas->translate(80.0f, 0.0f); 73 } 74 } 75 76 } 77 78 private: 79 using INHERITED = GM; 80 }; 81 82 DEF_GM( return new ScaledStrokesGM; ) 83