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
14 namespace skiagm {
15
16 class MorphologyGM : public GM {
17 public:
MorphologyGM()18 MorphologyGM() {
19 this->setBGColor(0xFF000000);
20 fOnce = false;
21 }
22
23 protected:
onShortName()24 virtual SkString onShortName() {
25 return SkString("morphology");
26 }
27
make_bitmap()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 const char* str1 = "ABC";
35 const char* str2 = "XYZ";
36 paint.setColor(0xFFFFFFFF);
37 paint.setTextSize(64);
38 canvas.drawText(str1, strlen(str1), 10, 55, paint);
39 canvas.drawText(str2, strlen(str2), 10, 110, paint);
40 }
41
onISize()42 virtual SkISize onISize() {
43 return SkISize::Make(WIDTH, HEIGHT);
44 }
45
drawClippedBitmap(SkCanvas * canvas,const SkPaint & paint,int x,int y)46 void drawClippedBitmap(SkCanvas* canvas, const SkPaint& paint, int x, int y) {
47 canvas->save();
48 canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
49 canvas->clipRect(SkRect::MakeWH(
50 SkIntToScalar(fBitmap.width()), SkIntToScalar(fBitmap.height())));
51 canvas->drawBitmap(fBitmap, 0, 0, &paint);
52 canvas->restore();
53 }
54
onDraw(SkCanvas * canvas)55 virtual void onDraw(SkCanvas* canvas) {
56 if (!fOnce) {
57 make_bitmap();
58 fOnce = true;
59 }
60 struct {
61 int fWidth, fHeight;
62 int fRadiusX, fRadiusY;
63 } samples[] = {
64 { 140, 140, 0, 0 },
65 { 140, 140, 0, 2 },
66 { 140, 140, 2, 0 },
67 { 140, 140, 2, 2 },
68 { 24, 24, 25, 25 },
69 };
70 SkPaint paint;
71 SkImageFilter::CropRect cropRect(SkRect::MakeXYWH(25, 20, 100, 80));
72
73 for (unsigned j = 0; j < 4; ++j) {
74 for (unsigned i = 0; i < SK_ARRAY_COUNT(samples); ++i) {
75 const SkImageFilter::CropRect* cr = j & 0x02 ? &cropRect : NULL;
76 if (j & 0x01) {
77 paint.setImageFilter(SkErodeImageFilter::Create(
78 samples[i].fRadiusX,
79 samples[i].fRadiusY,
80 NULL,
81 cr))->unref();
82 } else {
83 paint.setImageFilter(SkDilateImageFilter::Create(
84 samples[i].fRadiusX,
85 samples[i].fRadiusY,
86 NULL,
87 cr))->unref();
88 }
89 drawClippedBitmap(canvas, paint, i * 140, j * 140);
90 }
91 }
92 }
93
94 private:
95 typedef GM INHERITED;
96 SkBitmap fBitmap;
97 bool fOnce;
98 };
99
100 //////////////////////////////////////////////////////////////////////////////
101
MyFactory(void *)102 static GM* MyFactory(void*) { return new MorphologyGM; }
103 static GMRegistry reg(MyFactory);
104
105 }
106