xref: /third_party/skia/gm/drawregionmodes.cpp (revision cb93a386) 
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/gm.h"
9#include "include/core/SkBlurTypes.h"
10#include "include/core/SkCanvas.h"
11#include "include/core/SkColor.h"
12#include "include/core/SkImageFilter.h"
13#include "include/core/SkMaskFilter.h"
14#include "include/core/SkPaint.h"
15#include "include/core/SkPathEffect.h"
16#include "include/core/SkPoint.h"
17#include "include/core/SkRegion.h"
18#include "include/core/SkShader.h"
19#include "include/core/SkSize.h"
20#include "include/core/SkString.h"
21#include "include/core/SkTileMode.h"
22#include "include/effects/SkDashPathEffect.h"
23#include "include/effects/SkGradientShader.h"
24#include "include/effects/SkImageFilters.h"
25
26class DrawRegionModesGM : public skiagm::GM {
27public:
28    DrawRegionModesGM() {}
29
30protected:
31    SkString onShortName() override {
32        return SkString("drawregionmodes");
33    }
34
35    SkISize onISize() override {
36        return SkISize::Make(375, 500);
37    }
38
39    void onOnceBeforeDraw() override {
40        fRegion.op({50,  50, 100, 100}, SkRegion::kUnion_Op);
41        fRegion.op({50, 100, 150, 150}, SkRegion::kUnion_Op);
42    }
43
44    void onDraw(SkCanvas* canvas) override {
45        canvas->clear(SK_ColorGREEN);
46
47        SkPaint paint;
48        paint.setStyle(SkPaint::kFill_Style);
49        paint.setColor(SK_ColorRED);
50        paint.setAntiAlias(true);
51
52        canvas->save();
53        canvas->translate(-50.0f, 75.0f);
54        canvas->rotate(-45.0f);
55        canvas->drawRegion(fRegion, paint);
56
57        canvas->translate(125.0f, 125.0f);
58        paint.setImageFilter(SkImageFilters::Blur(5.0f, 5.0f, nullptr, nullptr));
59        canvas->drawRegion(fRegion, paint);
60
61        canvas->translate(-125.0f, 125.0f);
62        paint.setImageFilter(nullptr);
63        paint.setMaskFilter(SkMaskFilter::MakeBlur(kNormal_SkBlurStyle, 5.0f));
64        canvas->drawRegion(fRegion, paint);
65
66        canvas->translate(-125.0f, -125.0f);
67        paint.setMaskFilter(nullptr);
68        paint.setStyle(SkPaint::kStroke_Style);
69        float intervals[] = { 5.0f, 5.0f };
70        paint.setPathEffect(SkDashPathEffect::Make(intervals, 2, 2.5f));
71        canvas->drawRegion(fRegion, paint);
72
73        canvas->restore();
74
75        canvas->translate(100, 325);
76        paint.setPathEffect(nullptr);
77        paint.setStyle(SkPaint::kFill_Style);
78        SkPoint points[] = { SkPoint::Make(50.0f, 50.0f), SkPoint::Make(150.0f, 150.0f) };
79        SkColor colors[] = { SK_ColorBLUE, SK_ColorYELLOW };
80        paint.setShader(SkGradientShader::MakeLinear(points, colors, nullptr, 2,
81                                                     SkTileMode::kClamp));
82        canvas->drawRegion(fRegion, paint);
83    }
84
85private:
86    SkRegion fRegion;
87
88    using INHERITED = skiagm::GM;
89};
90DEF_GM( return new DrawRegionModesGM; )
91