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 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
onISize()43 virtual SkISize onISize() {
44 return SkISize::Make(WIDTH, HEIGHT);
45 }
46
drawClippedBitmap(SkCanvas * canvas,const SkPaint & paint,int x,int y)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
onDraw(SkCanvas * canvas)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 : NULL;
77 if (j & 0x01) {
78 paint.setImageFilter(SkErodeImageFilter::Create(
79 samples[i].fRadiusX,
80 samples[i].fRadiusY,
81 NULL,
82 cr))->unref();
83 } else {
84 paint.setImageFilter(SkDilateImageFilter::Create(
85 samples[i].fRadiusX,
86 samples[i].fRadiusY,
87 NULL,
88 cr))->unref();
89 }
90 drawClippedBitmap(canvas, paint, i * 140, j * 140);
91 }
92 }
93 }
94
95 private:
96 typedef GM INHERITED;
97 SkBitmap fBitmap;
98 bool fOnce;
99 };
100
101 //////////////////////////////////////////////////////////////////////////////
102
MyFactory(void *)103 static GM* MyFactory(void*) { return new MorphologyGM; }
104 static GMRegistry reg(MyFactory);
105
106 }
107