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1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "SkBitmapFilter.h" | 8 #include "SkBitmapFilter.h" |
9 #include "SkRTConf.h" | 9 #include "SkRTConf.h" |
10 #include "SkTypes.h" | 10 #include "SkTypes.h" |
11 | 11 |
12 #include <string.h> | 12 #include <string.h> |
13 | 13 |
14 // These are the per-scanline callbacks that are used when we must resort to | 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 | 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. | 16 // the image is rotated or has some other complex transformation applied. |
17 // Scaled images will usually be rescaled directly before rasterization. | 17 // Scaled images will usually be rescaled directly before rasterization. |
18 | 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]"); | 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 | 20 |
21 SkBitmapFilter *SkBitmapFilter::Allocate() { | 21 SkBitmapFilter *SkBitmapFilter::Allocate() { |
22 if (!strcmp(c_bitmapFilter, "mitchell")) { | 22 if (!strcmp(c_bitmapFilter, "mitchell")) { |
23 return new SkMitchellFilter(1.f / 3.f, 1.f / 3.f); | 23 return new SkMitchellFilter; |
24 } else if (!strcmp(c_bitmapFilter, "lanczos")) { | 24 } else if (!strcmp(c_bitmapFilter, "lanczos")) { |
25 return new SkLanczosFilter; | 25 return new SkLanczosFilter; |
26 } else if (!strcmp(c_bitmapFilter, "hamming")) { | 26 } else if (!strcmp(c_bitmapFilter, "hamming")) { |
27 return new SkHammingFilter; | 27 return new SkHammingFilter; |
28 } else if (!strcmp(c_bitmapFilter, "gaussian")) { | 28 } else if (!strcmp(c_bitmapFilter, "gaussian")) { |
29 return new SkGaussianFilter(2); | 29 return new SkGaussianFilter(2); |
30 } else if (!strcmp(c_bitmapFilter, "triangle")) { | 30 } else if (!strcmp(c_bitmapFilter, "triangle")) { |
31 return new SkTriangleFilter; | 31 return new SkTriangleFilter; |
32 } else if (!strcmp(c_bitmapFilter, "box")) { | 32 } else if (!strcmp(c_bitmapFilter, "box")) { |
33 return new SkBoxFilter; | 33 return new SkBoxFilter; |
34 } else { | 34 } else { |
35 SkDEBUGFAIL("Unknown filter type"); | 35 SkDEBUGFAIL("Unknown filter type"); |
36 } | 36 } |
37 | 37 |
38 return nullptr; | 38 return nullptr; |
39 } | 39 } |
40 | 40 |
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