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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 #ifndef SkGpuBlurUtils_DEFINED | 8 #ifndef SkGpuBlurUtils_DEFINED |
9 #define SkGpuBlurUtils_DEFINED | 9 #define SkGpuBlurUtils_DEFINED |
10 | 10 |
11 #if SK_SUPPORT_GPU | 11 #if SK_SUPPORT_GPU |
12 #include "GrTextureProvider.h" | 12 #include "GrTextureProvider.h" |
13 | 13 |
14 class GrTexture; | 14 class GrTexture; |
15 class GrContext; | 15 class GrContext; |
16 #endif | 16 #endif |
17 | 17 |
18 struct SkRect; | 18 struct SkRect; |
19 | 19 |
20 namespace SkGpuBlurUtils { | 20 namespace SkGpuBlurUtils { |
21 | 21 |
22 #if SK_SUPPORT_GPU | 22 #if SK_SUPPORT_GPU |
23 /** | 23 /** |
24 * Applies a 2D Gaussian blur to a given texture. | 24 * Applies a 2D Gaussian blur to a given texture. |
25 * @param context The GPU context | 25 * @param context The GPU context |
26 * @param srcTexture The source texture to be blurred. | 26 * @param srcTexture The source texture to be blurred. |
27 * @param canClobberSrc If true, srcTexture may be overwritten, and | |
28 * may be returned as the result. | |
29 * @param gammaCorrect Should blur be gamma-correct (sRGB to linear, etc..
.) | 27 * @param gammaCorrect Should blur be gamma-correct (sRGB to linear, etc..
.) |
30 * @param dstBounds The destination bounds, relative to the source text
ure. | 28 * @param dstBounds The destination bounds, relative to the source text
ure. |
31 * @param srcBounds The source bounds, relative to the source texture.
If non-null, | 29 * @param srcBounds The source bounds, relative to the source texture.
If non-null, |
32 * no pixels will be sampled outside of this rectangle
. | 30 * no pixels will be sampled outside of this rectangle
. |
33 * @param sigmaX The blur's standard deviation in X. | 31 * @param sigmaX The blur's standard deviation in X. |
34 * @param sigmaY The blur's standard deviation in Y. | 32 * @param sigmaY The blur's standard deviation in Y. |
35 * @return the blurred texture, which may be srcTexture reffed, or a | 33 * @return the blurred texture, which may be srcTexture reffed, or a |
36 * new texture. It is the caller's responsibility to unref this texture. | 34 * new texture. It is the caller's responsibility to unref this texture. |
37 */ | 35 */ |
38 GrTexture* GaussianBlur(GrContext* context, | 36 GrTexture* GaussianBlur(GrContext* context, |
39 GrTexture* srcTexture, | 37 GrTexture* srcTexture, |
40 bool canClobberSrc, | |
41 bool gammaCorrect, | 38 bool gammaCorrect, |
42 const SkRect& dstBounds, | 39 const SkRect& dstBounds, |
43 const SkRect* srcBounds, | 40 const SkRect* srcBounds, |
44 float sigmaX, | 41 float sigmaX, |
45 float sigmaY); | 42 float sigmaY); |
46 #endif | 43 #endif |
47 | 44 |
48 }; | 45 }; |
49 | 46 |
50 #endif | 47 #endif |
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