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1 /*
2  * Copyright 2014 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 "SkBlurImageFilter.h"
10 #include "SkRandom.h"
11 
12 #define WIDTH 640
13 #define HEIGHT 480
14 
15 namespace skiagm {
16 
17 class ImageBlurTiledGM : public GM {
18 public:
ImageBlurTiledGM(SkScalar sigmaX,SkScalar sigmaY)19     ImageBlurTiledGM(SkScalar sigmaX, SkScalar sigmaY)
20         : fSigmaX(sigmaX), fSigmaY(sigmaY) {
21     }
22 
23 protected:
onShortName()24     virtual SkString onShortName() {
25         return SkString("imageblurtiled");
26     }
27 
onISize()28     virtual SkISize onISize() {
29         return SkISize::Make(WIDTH, HEIGHT);
30     }
31 
onDraw(SkCanvas * canvas)32     virtual void onDraw(SkCanvas* canvas) {
33         SkPaint paint;
34         paint.setImageFilter(SkBlurImageFilter::Create(fSigmaX, fSigmaY))->unref();
35         const SkScalar tile_size = SkIntToScalar(128);
36         SkRect bounds;
37         if (!canvas->getClipBounds(&bounds)) {
38             bounds.setEmpty();
39         }
40         for (SkScalar y = bounds.top(); y < bounds.bottom(); y += tile_size) {
41             for (SkScalar x = bounds.left(); x < bounds.right(); x += tile_size) {
42                 canvas->save();
43                 canvas->clipRect(SkRect::MakeXYWH(x, y, tile_size, tile_size));
44                 canvas->saveLayer(NULL, &paint);
45                 const char* str[] = {
46                     "The quick",
47                     "brown fox",
48                     "jumped over",
49                     "the lazy dog.",
50                 };
51                 SkPaint textPaint;
52                 textPaint.setAntiAlias(true);
53                 textPaint.setTextSize(SkIntToScalar(100));
54                 int posY = 0;
55                 for (unsigned i = 0; i < SK_ARRAY_COUNT(str); i++) {
56                     posY += 100;
57                     canvas->drawText(str[i], strlen(str[i]), SkIntToScalar(0),
58                                      SkIntToScalar(posY), textPaint);
59                 }
60                 canvas->restore();
61                 canvas->restore();
62             }
63         }
64     }
65 
66 private:
67     SkScalar fSigmaX;
68     SkScalar fSigmaY;
69 
70     typedef GM INHERITED;
71 };
72 
73 //////////////////////////////////////////////////////////////////////////////
74 
MyFactory1(void *)75 static GM* MyFactory1(void*) { return new ImageBlurTiledGM(3.0f, 3.0f); }
76 static GMRegistry reg1(MyFactory1);
77 
78 }
79