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
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrMatrixConvolutionEffect_DEFINED
#define GrMatrixConvolutionEffect_DEFINED
#include "GrTextureDomain.h"
// A little bit less than the minimum # uniforms required by DX9SM2 (32).
// Allows for a 5x5 kernel (or 25x1, for that matter).
#define MAX_KERNEL_SIZE 25
class GrMatrixConvolutionEffect : public GrFragmentProcessor {
public:
static std::unique_ptr<GrFragmentProcessor> Make(sk_sp<GrTextureProxy> proxy,
const SkIRect& bounds,
const SkISize& kernelSize,
const SkScalar* kernel,
SkScalar gain,
SkScalar bias,
const SkIPoint& kernelOffset,
GrTextureDomain::Mode tileMode,
bool convolveAlpha) {
return std::unique_ptr<GrFragmentProcessor>(
new GrMatrixConvolutionEffect(std::move(proxy), bounds, kernelSize, kernel, gain,
bias, kernelOffset, tileMode, convolveAlpha));
}
static std::unique_ptr<GrFragmentProcessor> MakeGaussian(sk_sp<GrTextureProxy> proxy,
const SkIRect& bounds,
const SkISize& kernelSize,
SkScalar gain,
SkScalar bias,
const SkIPoint& kernelOffset,
GrTextureDomain::Mode tileMode,
bool convolveAlpha,
SkScalar sigmaX,
SkScalar sigmaY);
const SkIRect& bounds() const { return fBounds; }
const SkISize& kernelSize() const { return fKernelSize; }
const float* kernelOffset() const { return fKernelOffset; }
const float* kernel() const { return fKernel; }
float gain() const { return fGain; }
float bias() const { return fBias; }
bool convolveAlpha() const { return fConvolveAlpha; }
const GrTextureDomain& domain() const { return fDomain; }
const char* name() const override { return "MatrixConvolution"; }
std::unique_ptr<GrFragmentProcessor> clone() const override;
private:
GrMatrixConvolutionEffect(sk_sp<GrTextureProxy> proxy,
const SkIRect& bounds,
const SkISize& kernelSize,
const SkScalar* kernel,
SkScalar gain,
SkScalar bias,
const SkIPoint& kernelOffset,
GrTextureDomain::Mode tileMode,
bool convolveAlpha);
GrMatrixConvolutionEffect(const GrMatrixConvolutionEffect&);
GrGLSLFragmentProcessor* onCreateGLSLInstance() const override;
void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override;
bool onIsEqual(const GrFragmentProcessor&) const override;
GrCoordTransform fCoordTransform;
GrTextureDomain fDomain;
TextureSampler fTextureSampler;
SkIRect fBounds;
SkISize fKernelSize;
float fKernel[MAX_KERNEL_SIZE];
float fGain;
float fBias;
float fKernelOffset[2];
bool fConvolveAlpha;
GR_DECLARE_FRAGMENT_PROCESSOR_TEST
typedef GrFragmentProcessor INHERITED;
};
#endif
|
