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robertphillips@google.come1b75b42013-07-09 15:03:59 +00001/*
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#include "SkRandom.h"
10
11namespace skiagm {
12
skia.committer@gmail.com9e1ec1a2013-07-10 07:00:58 +000013// This GM draws a lot of arcs in a 'Z' shape. It particularly exercises
robertphillips@google.come1b75b42013-07-09 15:03:59 +000014// the 'drawArc' code near a singularly of its processing (i.e., near the
15// edge of one of its underlying quads).
16class ArcOfZorroGM : public GM {
17public:
18 ArcOfZorroGM() {
19 this->setBGColor(0xFFCCCCCC);
20 }
21
22protected:
commit-bot@chromium.orga90c6802014-04-30 13:20:45 +000023 virtual uint32_t onGetFlags() const SK_OVERRIDE {
24 return kSkipTiled_Flag;
25 }
26
robertphillips@google.come1b75b42013-07-09 15:03:59 +000027 virtual SkString onShortName() SK_OVERRIDE {
28 return SkString("arcofzorro");
29 }
30
31 virtual SkISize onISize() SK_OVERRIDE {
32 return make_isize(1000, 1000);
33 }
34
35 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
commit-bot@chromium.orge0e7cfe2013-09-09 20:09:12 +000036 SkRandom rand;
robertphillips@google.come1b75b42013-07-09 15:03:59 +000037
38 SkRect rect = SkRect::MakeXYWH(10, 10, 200, 200);
39
40 SkPaint p;
41
42 p.setStyle(SkPaint::kStroke_Style);
43 p.setStrokeWidth(35);
44 int xOffset = 0, yOffset = 0;
45 int direction = 0;
46
47 for (float arc = 134.0f; arc < 136.0f; arc += 0.01f) {
48 SkColor color = rand.nextU();
49 color |= 0xff000000;
50 p.setColor(color);
51
52 canvas->save();
53 canvas->translate(SkIntToScalar(xOffset), SkIntToScalar(yOffset));
54 canvas->drawArc(rect, 0, arc, false, p);
55 canvas->restore();
56
57 switch (direction) {
58 case 0:
59 xOffset += 10;
60 if (xOffset >= 700) {
61 direction = 1;
62 }
63 break;
64 case 1:
65 xOffset -= 10;
66 yOffset += 10;
67 if (xOffset < 50) {
68 direction = 2;
69 }
70 break;
71 case 2:
72 xOffset += 10;
73 break;
74 }
75 }
76
77 }
78
79private:
80 typedef GM INHERITED;
81};
82
83//////////////////////////////////////////////////////////////////////////////
84
85DEF_GM( return SkNEW(ArcOfZorroGM); )
86
87}