1/*
2 * Copyright 2012 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 "SkMorphologyImageFilter.h"
10
11#define WIDTH 640
12#define HEIGHT 480
13
14namespace skiagm {
15
16class MorphologyGM : public GM {
17public:
18    MorphologyGM() {
19        this->setBGColor(0xFF000000);
20        fOnce = false;
21    }
22
23protected:
24    virtual SkString onShortName() {
25        return SkString("morphology");
26    }
27
28    void make_bitmap() {
29        fBitmap.setConfig(SkBitmap::kARGB_8888_Config, 135, 135);
30        fBitmap.allocPixels();
31        SkDevice device(fBitmap);
32        SkCanvas canvas(&device);
33        canvas.clear(0x0);
34        SkPaint paint;
35        paint.setAntiAlias(true);
36        const char* str1 = "ABC";
37        const char* str2 = "XYZ";
38        paint.setColor(0xFFFFFFFF);
39        paint.setTextSize(64);
40        canvas.drawText(str1, strlen(str1), 10, 55, paint);
41        canvas.drawText(str2, strlen(str2), 10, 110, paint);
42    }
43
44    virtual SkISize onISize() {
45        return make_isize(WIDTH, HEIGHT);
46    }
47    virtual void onDraw(SkCanvas* canvas) {
48        if (!fOnce) {
49            make_bitmap();
50            fOnce = true;
51        }
52        struct {
53            int fRadiusX, fRadiusY;
54            bool erode;
55            SkScalar fX, fY;
56        } samples[] = {
57            { 0, 0, false, 0,   0 },
58            { 0, 2, false, 140, 0 },
59            { 2, 0, false, 280, 0 },
60            { 2, 2, false, 420, 0 },
61            { 0, 0, true,  0,   140 },
62            { 0, 2, true,  140, 140 },
63            { 2, 0, true,  280, 140 },
64            { 2, 2, true,  420, 140 },
65        };
66        const char* str = "The quick brown fox jumped over the lazy dog.";
67        SkPaint paint;
68        for (unsigned i = 0; i < SK_ARRAY_COUNT(samples); ++i) {
69            if (samples[i].erode) {
70                paint.setImageFilter(new SkErodeImageFilter(
71                    samples[i].fRadiusX,
72                    samples[i].fRadiusY))->unref();
73            } else {
74                paint.setImageFilter(new SkDilateImageFilter(
75                    samples[i].fRadiusX,
76                    samples[i].fRadiusY))->unref();
77            }
78            SkRect bounds = SkRect::MakeXYWH(samples[i].fX,
79                                             samples[i].fY,
80                                             140, 140);
81            canvas->saveLayer(&bounds, &paint);
82            canvas->drawBitmap(fBitmap, samples[i].fX, samples[i].fY);
83            canvas->restore();
84        }
85    }
86
87private:
88    typedef GM INHERITED;
89    SkBitmap fBitmap;
90    bool fOnce;
91};
92
93//////////////////////////////////////////////////////////////////////////////
94
95static GM* MyFactory(void*) { return new MorphologyGM; }
96static GMRegistry reg(MyFactory);
97
98}
99