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
10namespace skiagm {
11
12// Draw various width thin rects at 1/8 horizontal pixel increments
13class ThinRectsGM : public GM {
14public:
15    ThinRectsGM() {
16        this->setBGColor(0xFF000000);
17    }
18
19protected:
20    virtual SkString onShortName() SK_OVERRIDE {
21        return SkString("thinrects");
22    }
23
24    virtual SkISize onISize() SK_OVERRIDE {
25        return make_isize(240, 320);
26    }
27
28    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
29
30        SkPaint white;
31        white.setColor(SK_ColorWHITE);
32        white.setAntiAlias(true);
33
34        SkPaint green;
35        green.setColor(SK_ColorGREEN);
36        green.setAntiAlias(true);
37
38        for (int i = 0; i < 8; ++i) {
39            canvas->save();
40                canvas->translate(i*0.125f, i*40.0f);
41                DrawVertRects(canvas, white);
42
43                canvas->translate(40.0f, 0.0f);
44                DrawVertRects(canvas, green);
45            canvas->restore();
46
47            canvas->save();
48                canvas->translate(80.0f, i*40.0f + i*0.125f);
49                DrawHorizRects(canvas, white);
50
51                canvas->translate(40.0f, 0.0f);
52                DrawHorizRects(canvas, green);
53            canvas->restore();
54
55            canvas->save();
56                canvas->translate(160.0f + i*0.125f,
57                                  i*40.0f + i*0.125f);
58                DrawSquares(canvas, white);
59
60                canvas->translate(40.0f, 0.0f);
61                DrawSquares(canvas, green);
62            canvas->restore();
63        }
64    }
65
66private:
67    static void DrawVertRects(SkCanvas* canvas, const SkPaint& p) {
68        static const SkRect vertRects[] = {
69            { 1,  1,    5.0f, 21 }, // 4 pix wide
70            { 8,  1,   10.0f, 21 }, // 2 pix wide
71            { 13, 1,   14.0f, 21 }, // 1 pix wide
72            { 17, 1,   17.5f, 21 }, // 1/2 pix wide
73            { 21, 1,  21.25f, 21 }, // 1/4 pix wide
74            { 25, 1, 25.125f, 21 }, // 1/8 pix wide
75            { 29, 1,   29.0f, 21 }  // 0 pix wide
76        };
77
78        for (size_t j = 0; j < SK_ARRAY_COUNT(vertRects); ++j) {
79            canvas->drawRect(vertRects[j], p);
80        }
81    }
82
83    static void DrawHorizRects(SkCanvas* canvas, const SkPaint& p) {
84        static const SkRect horizRects[] = {
85            { 1, 1,  21,    5.0f }, // 4 pix high
86            { 1, 8,  21,   10.0f }, // 2 pix high
87            { 1, 13, 21,   14.0f }, // 1 pix high
88            { 1, 17, 21,   17.5f }, // 1/2 pix high
89            { 1, 21, 21,  21.25f }, // 1/4 pix high
90            { 1, 25, 21, 25.125f }, // 1/8 pix high
91            { 1, 29, 21,   29.0f }  // 0 pix high
92        };
93
94        for (size_t j = 0; j < SK_ARRAY_COUNT(horizRects); ++j) {
95            canvas->drawRect(horizRects[j], p);
96        }
97    }
98
99    static void DrawSquares(SkCanvas* canvas, const SkPaint& p) {
100        static const SkRect squares[] = {
101            { 1,  1,     5.0f,    5.0f }, // 4 pix
102            { 8,  8,    10.0f,   10.0f }, // 2 pix
103            { 13, 13,   14.0f,   14.0f }, // 1 pix
104            { 17, 17,   17.5f,   17.5f }, // 1/2 pix
105            { 21, 21,  21.25f,  21.25f }, // 1/4 pix
106            { 25, 25, 25.125f, 25.125f }, // 1/8 pix
107            { 29, 29,   29.0f,   29.0f }  // 0 pix
108        };
109
110        for (size_t j = 0; j < SK_ARRAY_COUNT(squares); ++j) {
111            canvas->drawRect(squares[j], p);
112        }
113    }
114
115    typedef GM INHERITED;
116};
117
118//////////////////////////////////////////////////////////////////////////////
119
120static GM* MyFactory(void*) { return new ThinRectsGM; }
121static GMRegistry reg(MyFactory);
122
123}
124