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1 /* | |
2 * Copyright 2013 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 "SkColor.h" | |
10 #include "SkBicubicImageFilter.h" | |
11 | |
12 namespace skiagm { | |
13 | |
14 class BicubicGM : public GM { | |
15 public: | |
16 BicubicGM() : fInitialized(false) { | |
17 this->setBGColor(0x00000000); | |
18 } | |
19 | |
20 protected: | |
21 virtual uint32_t onGetFlags() const SK_OVERRIDE { | |
22 return kSkipTiled_Flag; | |
23 } | |
24 | |
25 virtual SkString onShortName() { | |
26 return SkString("bicubicfilter"); | |
27 } | |
28 | |
29 void make_checkerboard(int width, int height) { | |
30 SkASSERT(width % 2 == 0); | |
31 SkASSERT(height % 2 == 0); | |
32 fCheckerboard.allocN32Pixels(width, height); | |
33 for (int y = 0; y < height; y += 2) { | |
34 SkPMColor* s = fCheckerboard.getAddr32(0, y); | |
35 for (int x = 0; x < width; x += 2) { | |
36 *s++ = 0xFFFFFFFF; | |
37 *s++ = 0xFF000000; | |
38 } | |
39 s = fCheckerboard.getAddr32(0, y + 1); | |
40 for (int x = 0; x < width; x += 2) { | |
41 *s++ = 0xFF000000; | |
42 *s++ = 0xFFFFFFFF; | |
43 } | |
44 } | |
45 } | |
46 | |
47 virtual SkISize onISize() { | |
48 return SkISize::Make(400, 300); | |
49 } | |
50 | |
51 virtual void onDraw(SkCanvas* canvas) { | |
52 if (!fInitialized) { | |
53 make_checkerboard(4, 4); | |
54 fInitialized = true; | |
55 } | |
56 SkScalar sk32 = SkIntToScalar(32); | |
57 canvas->clear(0x00000000); | |
58 SkPaint bilinearPaint, bicubicPaint; | |
59 SkSize scale = SkSize::Make(sk32, sk32); | |
60 canvas->save(); | |
61 canvas->scale(sk32, sk32); | |
62 bilinearPaint.setFilterLevel(SkPaint::kLow_FilterLevel); | |
63 canvas->drawBitmap(fCheckerboard, 0, 0, &bilinearPaint); | |
64 canvas->restore(); | |
65 SkAutoTUnref<SkImageFilter> bicubic(SkBicubicImageFilter::CreateMitchell
(scale)); | |
66 bicubicPaint.setImageFilter(bicubic); | |
67 SkRect srcBounds; | |
68 fCheckerboard.getBounds(&srcBounds); | |
69 canvas->translate(SkIntToScalar(140), 0); | |
70 canvas->saveLayer(&srcBounds, &bicubicPaint); | |
71 canvas->drawBitmap(fCheckerboard, 0, 0); | |
72 canvas->restore(); | |
73 } | |
74 | |
75 private: | |
76 typedef GM INHERITED; | |
77 SkBitmap fCheckerboard; | |
78 bool fInitialized; | |
79 }; | |
80 | |
81 ////////////////////////////////////////////////////////////////////////////// | |
82 | |
83 static GM* MyFactory(void*) { return new BicubicGM; } | |
84 static GMRegistry reg(MyFactory); | |
85 | |
86 } | |
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