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 "SkPath.h"
10#include "SkRandom.h"
11#include "SkRRect.h"
12
13namespace skiagm {
14
15// Test out various combinations of nested rects, ovals and rrects.
16class NestedGM : public GM {
17public:
18    NestedGM(bool doAA, bool flipped) : fDoAA(doAA), fFlipped(flipped) {
19        this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD));
20    }
21
22protected:
23
24    SkString onShortName() override {
25        SkString name("nested");
26        if (fFlipped) {
27            name.append("_flipY");
28        }
29        if (fDoAA) {
30            name.append("_aa");
31        } else {
32            name.append("_bw");
33        }
34        return name;
35    }
36
37    SkISize onISize() override {
38        return SkISize::Make(kImageWidth, kImageHeight);
39    }
40
41    enum Shapes {
42        kRect_Shape = 0,
43        kRRect_Shape,
44        kOval_Shape,
45        kShapeCount
46    };
47
48    static void AddShape(SkPath* path, const SkRect& rect, Shapes shape, SkPath::Direction dir) {
49        switch (shape) {
50            case kRect_Shape:
51                path->addRect(rect, dir);
52                break;
53            case kRRect_Shape: {
54                SkRRect rr;
55                rr.setRectXY(rect, 5, 5);
56                path->addRRect(rr, dir);
57                break;
58                }
59            case kOval_Shape:
60                path->addOval(rect, dir);
61                break;
62            default:
63                break;
64        }
65    }
66
67    void onDraw(SkCanvas* canvas) override {
68
69        SkPaint shapePaint;
70        shapePaint.setColor(SK_ColorBLACK);
71        shapePaint.setAntiAlias(fDoAA);
72
73        SkRect outerRect = SkRect::MakeWH(40, 40);
74
75        SkRect innerRects[] = {
76            { 10, 10, 30, 30 },     // small
77            { .5f, 18, 4.5f, 22 }   // smaller and offset to left
78        };
79
80        // draw a background pattern to make transparency errors more apparent
81        SkRandom rand;
82
83        for (int y = 0; y < kImageHeight; y += 10) {
84            for (int x = 0; x < kImageWidth; x += 10) {
85                SkRect r = SkRect::MakeXYWH(SkIntToScalar(x),
86                                            SkIntToScalar(y),
87                                            10, 10);
88                SkPaint p;
89                p.setColor(rand.nextU() | 0xFF000000);
90                canvas->drawRect(r, p);
91            }
92        }
93
94        SkScalar xOff = 2, yOff = 2;
95        for (int outerShape = 0; outerShape < kShapeCount; ++outerShape) {
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->save();
105                    if (fFlipped) {
106                        canvas->scale(1.0f, -1.0f);
107                        canvas->translate(xOff, -yOff - 40.0f);
108                    } else {
109                        canvas->translate(xOff, yOff);
110                    }
111
112                    canvas->drawPath(path, shapePaint);
113                    canvas->restore();
114
115                    xOff += 45;
116                }
117            }
118
119            xOff = 2;
120            yOff += 45;
121        }
122
123    }
124
125private:
126    static const int kImageWidth = 269;
127    static const int kImageHeight = 134;
128
129    bool fDoAA;
130    bool fFlipped;
131
132    typedef GM INHERITED;
133};
134
135///////////////////////////////////////////////////////////////////////////////
136
137DEF_GM( return new NestedGM(/* doAA = */ true,  /* flipped = */ false); )
138DEF_GM( return new NestedGM(/* doAA = */ false, /* flipped = */ false); )
139DEF_GM( return new NestedGM(/* doAA = */ true,  /* flipped = */ true); )
140DEF_GM( return new NestedGM(/* doAA = */ false, /* flipped = */ true); )
141
142}
143