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 fWidth, fHeight;
54            int fRadiusX, fRadiusY;
55        } samples[] = {
56            { 140, 140,   0,   0 },
57            { 140, 140,   0,   2 },
58            { 140, 140,   2,   0 },
59            { 140, 140,   2,   2 },
60            {  24,  24,  25,  25 },
61        };
62        SkPaint paint;
63        for (unsigned j = 0; j < 2; ++j) {
64            for (unsigned i = 0; i < SK_ARRAY_COUNT(samples); ++i) {
65                SkScalar x = SkIntToScalar(i * 140), y = SkIntToScalar(j * 140);
66                if (j) {
67                    paint.setImageFilter(new SkErodeImageFilter(
68                        samples[i].fRadiusX,
69                        samples[i].fRadiusY))->unref();
70                } else {
71                    paint.setImageFilter(new SkDilateImageFilter(
72                        samples[i].fRadiusX,
73                        samples[i].fRadiusY))->unref();
74                }
75                SkRect bounds = SkRect::MakeXYWH(
76                    x,
77                    y,
78                    SkIntToScalar(samples[i].fWidth),
79                    SkIntToScalar(samples[i].fHeight));
80                canvas->saveLayer(&bounds, &paint);
81                canvas->drawBitmap(fBitmap, x, y);
82                canvas->restore();
83            }
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