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#include "SkRandom.h"
10#include "SkRRect.h"
11
12namespace skiagm {
13
14// Test out various combinations of nested rects, ovals and rrects.
15class NestedGM : public GM {
16public:
17    NestedGM(bool doAA) : fDoAA(doAA) {
18        this->setBGColor(0xFFDDDDDD);
19    }
20
21protected:
22    virtual uint32_t onGetFlags() const SK_OVERRIDE {
23        return kSkipTiled_Flag;
24    }
25
26    virtual SkString onShortName() SK_OVERRIDE {
27        SkString name("nested");
28        if (fDoAA) {
29            name.append("_aa");
30        } else {
31            name.append("_bw");
32        }
33        return name;
34    }
35
36    virtual SkISize onISize() SK_OVERRIDE {
37        return SkISize::Make(kImageWidth, kImageHeight);
38    }
39
40    enum Shapes {
41        kRect_Shape = 0,
42        kRRect_Shape,
43        kOval_Shape,
44        kShapeCount
45    };
46
47    static void AddShape(SkPath* path, const SkRect& rect, Shapes shape, SkPath::Direction dir) {
48        switch (shape) {
49            case kRect_Shape:
50                path->addRect(rect, dir);
51                break;
52            case kRRect_Shape: {
53                SkRRect rr;
54                rr.setRectXY(rect, 5, 5);
55                path->addRRect(rr, dir);
56                break;
57                }
58            case kOval_Shape:
59                path->addOval(rect, dir);
60                break;
61            default:
62                break;
63        }
64    }
65
66    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
67
68        SkPaint shapePaint;
69        shapePaint.setColor(SK_ColorBLACK);
70        shapePaint.setAntiAlias(fDoAA);
71
72        SkRect outerRect = SkRect::MakeWH(40, 40);
73
74        SkRect innerRects[] = {
75            { 10, 10, 30, 30 },     // small
76            { .5f, 18, 4.5f, 22 }   // smaller and offset to left
77        };
78
79        // draw a background pattern to make transparency errors more apparent
80        SkRandom rand;
81
82        for (int y = 0; y < kImageHeight; y += 10) {
83            for (int x = 0; x < kImageWidth; x += 10) {
84                SkRect r = SkRect::MakeXYWH(SkIntToScalar(x),
85                                            SkIntToScalar(y),
86                                            10, 10);
87                SkPaint p;
88                p.setColor(rand.nextU() | 0xFF000000);
89                canvas->drawRect(r, p);
90            }
91        }
92
93        canvas->translate(2, 2);
94        for (int outerShape = 0; outerShape < kShapeCount; ++outerShape) {
95            canvas->save();
96            for (int innerShape = 0; innerShape < kShapeCount; ++innerShape) {
97                for (size_t innerRect = 0; innerRect < SK_ARRAY_COUNT(innerRects); ++innerRect) {
98                    SkPath path;
99
100                    AddShape(&path, outerRect, (Shapes) outerShape, SkPath::kCW_Direction);
101                    AddShape(&path, innerRects[innerRect], (Shapes) innerShape,
102                             SkPath::kCCW_Direction);
103
104                    canvas->drawPath(path, shapePaint);
105                    canvas->translate(45, 0);
106                }
107            }
108            canvas->restore();
109            canvas->translate(0, 45);
110        }
111
112    }
113
114private:
115    static const int kImageWidth = 269;
116    static const int kImageHeight = 134;
117
118    bool fDoAA;
119
120    typedef GM INHERITED;
121};
122
123///////////////////////////////////////////////////////////////////////////////
124
125DEF_GM( return new NestedGM(true); )
126DEF_GM( return new NestedGM(false); )
127
128
129}
130