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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 "SkBitmapFilter.h" | |
9 #include "SkRTConf.h" | |
10 #include "SkTypes.h" | |
11 | |
12 #include <string.h> | |
13 | |
14 // These are the per-scanline callbacks that are used when we must resort to | |
15 // resampling an image as it is blitted. Typically these are used only when | |
16 // the image is rotated or has some other complex transformation applied. | |
17 // Scaled images will usually be rescaled directly before rasterization. | |
18 | |
19 SK_CONF_DECLARE(const char *, c_bitmapFilter, "bitmap.filter", "mitchell", "Whic
h scanline bitmap filter to use [mitchell, lanczos, hamming, gaussian, triangle,
box]"); | |
20 | |
21 SkBitmapFilter *SkBitmapFilter::Allocate() { | |
22 if (!strcmp(c_bitmapFilter, "mitchell")) { | |
23 return new SkMitchellFilter; | |
24 } else if (!strcmp(c_bitmapFilter, "lanczos")) { | |
25 return new SkLanczosFilter; | |
26 } else if (!strcmp(c_bitmapFilter, "hamming")) { | |
27 return new SkHammingFilter; | |
28 } else if (!strcmp(c_bitmapFilter, "gaussian")) { | |
29 return new SkGaussianFilter(2); | |
30 } else if (!strcmp(c_bitmapFilter, "triangle")) { | |
31 return new SkTriangleFilter; | |
32 } else if (!strcmp(c_bitmapFilter, "box")) { | |
33 return new SkBoxFilter; | |
34 } else { | |
35 SkDEBUGFAIL("Unknown filter type"); | |
36 } | |
37 | |
38 return nullptr; | |
39 } | |
40 | |
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