blob: 4f80fc31143465a246c19f8dda5406bc80befe49 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkGpuBlurUtils_DEFINED
#define SkGpuBlurUtils_DEFINED
#if SK_SUPPORT_GPU
#include "GrDrawContext.h"
class GrContext;
class GrTexture;
struct SkRect;
namespace SkGpuBlurUtils {
/**
* Applies a 2D Gaussian blur to a given texture. The blurred result is returned
* as a drawContext in case the caller wishes to future draw into the result.
* Note: one of sigmaX and sigmaY should be non-zero!
* @param context The GPU context
* @param srcTexture The source texture to be blurred.
* @param gammaCorrect Should blur be gamma-correct (sRGB to linear, etc...)
* @param dstBounds The destination bounds, relative to the source texture.
* @param srcBounds The source bounds, relative to the source texture. If non-null,
* no pixels will be sampled outside of this rectangle.
* @param sigmaX The blur's standard deviation in X.
* @param sigmaY The blur's standard deviation in Y.
* @return The drawContext containing the blurred result.
*/
sk_sp<GrDrawContext> GaussianBlur(GrContext* context,
GrTexture* srcTexture,
bool gammaCorrect,
const SkIRect& dstBounds,
const SkIRect* srcBounds,
float sigmaX,
float sigmaY);
};
#endif
#endif
|
