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 700
12#define HEIGHT 560
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.allocN32Pixels(135, 135);
30        SkCanvas canvas(fBitmap);
31        canvas.clear(0x0);
32        SkPaint paint;
33        paint.setAntiAlias(true);
34        sk_tool_utils::set_portable_typeface(&paint);
35        const char* str1 = "ABC";
36        const char* str2 = "XYZ";
37        paint.setColor(0xFFFFFFFF);
38        paint.setTextSize(64);
39        canvas.drawText(str1, strlen(str1), 10, 55, paint);
40        canvas.drawText(str2, strlen(str2), 10, 110, paint);
41    }
42
43    virtual SkISize onISize() {
44        return SkISize::Make(WIDTH, HEIGHT);
45    }
46
47    void drawClippedBitmap(SkCanvas* canvas, const SkPaint& paint, int x, int y) {
48        canvas->save();
49        canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
50        canvas->clipRect(SkRect::MakeWH(
51          SkIntToScalar(fBitmap.width()), SkIntToScalar(fBitmap.height())));
52        canvas->drawBitmap(fBitmap, 0, 0, &paint);
53        canvas->restore();
54    }
55
56    virtual void onDraw(SkCanvas* canvas) {
57        if (!fOnce) {
58            make_bitmap();
59            fOnce = true;
60        }
61        struct {
62            int fWidth, fHeight;
63            int fRadiusX, fRadiusY;
64        } samples[] = {
65            { 140, 140,   0,   0 },
66            { 140, 140,   0,   2 },
67            { 140, 140,   2,   0 },
68            { 140, 140,   2,   2 },
69            {  24,  24,  25,  25 },
70        };
71        SkPaint paint;
72        SkImageFilter::CropRect cropRect(SkRect::MakeXYWH(25, 20, 100, 80));
73
74        for (unsigned j = 0; j < 4; ++j) {
75            for (unsigned i = 0; i < SK_ARRAY_COUNT(samples); ++i) {
76                const SkImageFilter::CropRect* cr = j & 0x02 ? &cropRect : nullptr;
77                if (j & 0x01) {
78                    paint.setImageFilter(SkErodeImageFilter::Create(
79                        samples[i].fRadiusX,
80                        samples[i].fRadiusY,
81                        nullptr,
82                        cr))->unref();
83                } else {
84                    paint.setImageFilter(SkDilateImageFilter::Create(
85                        samples[i].fRadiusX,
86                        samples[i].fRadiusY,
87                        nullptr,
88                        cr))->unref();
89                }
90                drawClippedBitmap(canvas, paint, i * 140, j * 140);
91            }
92        }
93    }
94
95private:
96    typedef GM INHERITED;
97    SkBitmap fBitmap;
98    bool fOnce;
99};
100
101//////////////////////////////////////////////////////////////////////////////
102
103static GM* MyFactory(void*) { return new MorphologyGM; }
104static GMRegistry reg(MyFactory);
105
106}
107