1 /*
2  * Copyright 2016 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 "SkBlurImageFilter.h"
10 #include "SkCanvas.h"
11 #include "SkDashPathEffect.h"
12 #include "SkGradientShader.h"
13 #include "SkMaskFilter.h"
14 #include "SkRegion.h"
15 
16 class DrawRegionModesGM : public skiagm::GM {
17 public:
DrawRegionModesGM()18     DrawRegionModesGM() {}
19 
20 protected:
onShortName()21     SkString onShortName() override {
22         return SkString("drawregionmodes");
23     }
24 
onISize()25     SkISize onISize() override {
26         return SkISize::Make(375, 500);
27     }
28 
onOnceBeforeDraw()29     void onOnceBeforeDraw() override {
30         fRegion.op( 50,  50, 100, 100, SkRegion::kUnion_Op);
31         fRegion.op( 50, 100, 150, 150, SkRegion::kUnion_Op);
32     }
33 
onDraw(SkCanvas * canvas)34     void onDraw(SkCanvas* canvas) override {
35         canvas->clear(SK_ColorGREEN);
36 
37         SkPaint paint;
38         paint.setStyle(SkPaint::kFill_Style);
39         paint.setColor(SK_ColorRED);
40         paint.setAntiAlias(true);
41 
42         canvas->save();
43         canvas->translate(-50.0f, 75.0f);
44         canvas->rotate(-45.0f);
45         canvas->drawRegion(fRegion, paint);
46 
47         canvas->translate(125.0f, 125.0f);
48         paint.setImageFilter(SkBlurImageFilter::Make(5.0f, 5.0f, nullptr, nullptr));
49         canvas->drawRegion(fRegion, paint);
50 
51         canvas->translate(-125.0f, 125.0f);
52         paint.setImageFilter(nullptr);
53         paint.setMaskFilter(SkMaskFilter::MakeBlur(kNormal_SkBlurStyle, 5.0f));
54         canvas->drawRegion(fRegion, paint);
55 
56         canvas->translate(-125.0f, -125.0f);
57         paint.setMaskFilter(nullptr);
58         paint.setStyle(SkPaint::kStroke_Style);
59         float intervals[] = { 5.0f, 5.0f };
60         paint.setPathEffect(SkDashPathEffect::Make(intervals, 2, 2.5f));
61         canvas->drawRegion(fRegion, paint);
62 
63         canvas->restore();
64 
65         canvas->translate(100, 325);
66         paint.setPathEffect(nullptr);
67         paint.setStyle(SkPaint::kFill_Style);
68         SkPoint points[] = { SkPoint::Make(50.0f, 50.0f), SkPoint::Make(150.0f, 150.0f) };
69         SkColor colors[] = { SK_ColorBLUE, SK_ColorYELLOW };
70         paint.setShader(SkGradientShader::MakeLinear(points, colors, nullptr, 2,
71                                                      SkShader::kClamp_TileMode));
72         canvas->drawRegion(fRegion, paint);
73     }
74 
75 private:
76     SkRegion fRegion;
77 
78     typedef skiagm::GM INHERITED;
79 };
80 DEF_GM( return new DrawRegionModesGM; )
81