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 "SkImageFilter.h"
10 #include "SkRandom.h"
11 
12 #define WIDTH 640
13 #define HEIGHT 480
14 
15 #define RESIZE_FACTOR SkIntToScalar(2)
16 
17 namespace skiagm {
18 
19 class ImageResizeTiledGM : public GM {
20 public:
ImageResizeTiledGM()21     ImageResizeTiledGM() {
22     }
23 
24 protected:
25 
onShortName()26     SkString onShortName() override {
27         return SkString("imageresizetiled");
28     }
29 
onISize()30     SkISize onISize() override {
31         return SkISize::Make(WIDTH, HEIGHT);
32     }
33 
onDraw(SkCanvas * canvas)34     void onDraw(SkCanvas* canvas) override {
35         SkPaint paint;
36         SkMatrix matrix;
37         matrix.setScale(RESIZE_FACTOR, RESIZE_FACTOR);
38         SkAutoTUnref<SkImageFilter> imageFilter(
39             SkImageFilter::CreateMatrixFilter(matrix, kNone_SkFilterQuality));
40         paint.setImageFilter(imageFilter.get());
41         const SkScalar tile_size = SkIntToScalar(100);
42         SkRect bounds;
43         canvas->getClipBounds(&bounds);
44         for (SkScalar y = 0; y < HEIGHT; y += tile_size) {
45             for (SkScalar x = 0; x < WIDTH; x += tile_size) {
46                 canvas->save();
47                 canvas->clipRect(SkRect::MakeXYWH(x, y, tile_size, tile_size));
48                 canvas->scale(SkScalarInvert(RESIZE_FACTOR),
49                               SkScalarInvert(RESIZE_FACTOR));
50                 canvas->saveLayer(NULL, &paint);
51                 const char* str[] = {
52                     "The quick",
53                     "brown fox",
54                     "jumped over",
55                     "the lazy dog.",
56                 };
57                 SkPaint textPaint;
58                 textPaint.setAntiAlias(true);
59                 sk_tool_utils::set_portable_typeface(&textPaint);
60                 textPaint.setTextSize(SkIntToScalar(100));
61                 int posY = 0;
62                 for (unsigned i = 0; i < SK_ARRAY_COUNT(str); i++) {
63                     posY += 100;
64                     canvas->drawText(str[i], strlen(str[i]), SkIntToScalar(0),
65                                      SkIntToScalar(posY), textPaint);
66                 }
67                 canvas->restore();
68                 canvas->restore();
69             }
70         }
71     }
72 
73 private:
74     typedef GM INHERITED;
75 };
76 
77 //////////////////////////////////////////////////////////////////////////////
78 
79 DEF_GM(return new ImageResizeTiledGM(); )
80 
81 }
82