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| 1 /* |
| 2 * Copyright 2016 Google Inc. |
| 3 * |
| 4 * Use of this source code is governed by a BD-style license that can be |
| 5 * found in the LICENSE file. |
| 6 */ |
| 7 |
| 8 #include "gm.h" |
| 9 #include "SkParsePath.h" |
| 10 #include "SkPath.h" |
| 11 |
| 12 /* |
| 13 The arcto test below should draw the same as this SVG: |
| 14 (Note that Skia's arcTo Direction parameter value is opposite SVG's sweep value,
e.g. 0 / 1) |
| 15 |
| 16 <svg width="500" height="600"> |
| 17 <path d="M 50,100 A50,50, 0,0,1, 150,200" style="stroke:#660000; fill:none; st
roke-width:2" /> |
| 18 <path d="M100,100 A50,100, 0,0,1, 200,200" style="stroke:#660000; fill:none; st
roke-width:2" /> |
| 19 <path d="M150,100 A50,50, 45,0,1, 250,200" style="stroke:#660000; fill:none; st
roke-width:2" /> |
| 20 <path d="M200,100 A50,100, 45,0,1, 300,200" style="stroke:#660000; fill:none; st
roke-width:2" /> |
| 21 |
| 22 <path d="M150,200 A50,50, 0,1,0, 150,300" style="stroke:#660000; fill:none; st
roke-width:2" /> |
| 23 <path d="M200,200 A50,100, 0,1,0, 200,300" style="stroke:#660000; fill:none; st
roke-width:2" /> |
| 24 <path d="M250,200 A50,50, 45,1,0, 250,300" style="stroke:#660000; fill:none; st
roke-width:2" /> |
| 25 <path d="M300,200 A50,100, 45,1,0, 300,300" style="stroke:#660000; fill:none; st
roke-width:2" /> |
| 26 |
| 27 <path d="M250,400 A120,80 0 0,0 250,500" |
| 28 fill="none" stroke="red" stroke-width="5" /> |
| 29 |
| 30 <path d="M250,400 A120,80 0 1,1 250,500" |
| 31 fill="none" stroke="green" stroke-width="5"/> |
| 32 |
| 33 <path d="M250,400 A120,80 0 1,0 250,500" |
| 34 fill="none" stroke="purple" stroke-width="5"/> |
| 35 |
| 36 <path d="M250,400 A120,80 0 0,1 250,500" |
| 37 fill="none" stroke="blue" stroke-width="5"/> |
| 38 </svg> |
| 39 */ |
| 40 |
| 41 DEF_SIMPLE_GM(arcto, canvas, 500, 600) { |
| 42 SkPaint paint; |
| 43 paint.setAntiAlias(true); |
| 44 paint.setStyle(SkPaint::kStroke_Style); |
| 45 paint.setStrokeWidth(2); |
| 46 paint.setColor(0xFF660000); |
| 47 canvas->scale(2, 2); |
| 48 SkRect oval = SkRect::MakeXYWH(100, 100, 100, 100); |
| 49 SkPath svgArc; |
| 50 |
| 51 for (int angle = 0; angle <= 45; angle += 45) { |
| 52 for (int oHeight = 2; oHeight >= 1; --oHeight) { |
| 53 SkScalar ovalHeight = oval.height() / oHeight; |
| 54 svgArc.moveTo(oval.fLeft, oval.fTop); |
| 55 svgArc.arcTo(oval.width() / 2, ovalHeight, SkIntToScalar(angle), SkP
ath::kSmall_ArcSize, |
| 56 SkPath::kCW_Direction, oval.right(), oval.bottom()); |
| 57 canvas->drawPath(svgArc, paint); |
| 58 svgArc.reset(); |
| 59 |
| 60 svgArc.moveTo(oval.fLeft + 100, oval.fTop + 100); |
| 61 svgArc.arcTo(oval.width() / 2, ovalHeight, SkIntToScalar(angle), SkP
ath::kLarge_ArcSize, |
| 62 SkPath::kCCW_Direction, oval.right(), oval.bottom() + 100); |
| 63 canvas->drawPath(svgArc, paint); |
| 64 oval.offset(50, 0); |
| 65 svgArc.reset(); |
| 66 |
| 67 } |
| 68 } |
| 69 |
| 70 paint.setStrokeWidth(5); |
| 71 const SkColor purple = 0xFF800080; |
| 72 const SkColor darkgreen = 0xFF008000; |
| 73 const SkColor colors[] = { SK_ColorRED, darkgreen, purple, SK_ColorBLUE }; |
| 74 const char* arcstrs[] = { |
| 75 "M250,400 A120,80 0 0,0 250,500", |
| 76 "M250,400 A120,80 0 1,1 250,500", |
| 77 "M250,400 A120,80 0 1,0 250,500", |
| 78 "M250,400 A120,80 0 0,1 250,500" |
| 79 }; |
| 80 int cIndex = 0; |
| 81 for (const char* arcstr : arcstrs) { |
| 82 SkParsePath::FromSVGString(arcstr, &svgArc); |
| 83 paint.setColor(colors[cIndex++]); |
| 84 canvas->drawPath(svgArc, paint); |
| 85 } |
| 86 } |
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