1 /*
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 
10 namespace skiagm {
11 
12 // Draw rects with various stroke widths at 1/8 pixel increments
13 class ThinStrokedRectsGM : public GM {
14 public:
ThinStrokedRectsGM()15     ThinStrokedRectsGM() {
16         this->setBGColor(0xFF000000);
17     }
18 
19 protected:
onShortName()20     SkString onShortName() override {
21         return SkString("thinstrokedrects");
22     }
23 
onISize()24     SkISize onISize() override {
25         return SkISize::Make(240, 320);
26     }
27 
onDraw(SkCanvas * canvas)28     void onDraw(SkCanvas* canvas) override {
29 
30         SkPaint paint;
31         paint.setColor(SK_ColorWHITE);
32         paint.setStyle(SkPaint::kStroke_Style);
33         paint.setAntiAlias(true);
34 
35         static const SkRect rect = { 0, 0, 10, 10 };
36         static const SkRect rect2 = { 0, 0, 20, 20 };
37 
38         static const SkScalar gStrokeWidths[] = {
39             4, 2, 1, 0.5f, 0.25f, 0.125f, 0
40         };
41 
42         canvas->translate(5, 5);
43         for (int i = 0; i < 8; ++i) {
44             canvas->save();
45             canvas->translate(i*0.125f, i*30.0f);
46             for (size_t j = 0; j < SK_ARRAY_COUNT(gStrokeWidths); ++j) {
47                 paint.setStrokeWidth(gStrokeWidths[j]);
48                 canvas->drawRect(rect, paint);
49                 canvas->translate(15, 0);
50             }
51             canvas->restore();
52         }
53 
54         // Draw a second time in red with a scale
55         paint.setColor(SK_ColorRED);
56         canvas->translate(0, 15);
57         for (int i = 0; i < 8; ++i) {
58             canvas->save();
59             canvas->translate(i*0.125f, i*30.0f);
60             canvas->scale(0.5f, 0.5f);
61             for (size_t j = 0; j < SK_ARRAY_COUNT(gStrokeWidths); ++j) {
62                 paint.setStrokeWidth(2.0f * gStrokeWidths[j]);
63                 canvas->drawRect(rect2, paint);
64                 canvas->translate(30, 0);
65             }
66             canvas->restore();
67         }
68     }
69 
70 private:
71     typedef GM INHERITED;
72 };
73 
74 //////////////////////////////////////////////////////////////////////////////
75 
76 DEF_GM( return SkNEW(ThinStrokedRectsGM); )
77 
78 }
79