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
|
/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrCircleBlurFragmentProcessor_DEFINED
#define GrCircleBlurFragmentProcessor_DEFINED
#include "SkString.h"
#include "SkTypes.h"
#if SK_SUPPORT_GPU
#include "GrFragmentProcessor.h"
#include "GrProcessorUnitTest.h"
class GrTextureProvider;
// This FP handles the special case of a blurred circle. It uses a 1D
// profile that is just rotated about the origin of the circle.
class GrCircleBlurFragmentProcessor : public GrFragmentProcessor {
public:
~GrCircleBlurFragmentProcessor() override {};
const char* name() const override { return "CircleBlur"; }
SkString dumpInfo() const override {
SkString str;
str.appendf("Rect [L: %.2f, T: %.2f, R: %.2f, B: %.2f], Sigma %.2f, Offset: %.2f",
fCircle.fLeft, fCircle.fTop, fCircle.fRight, fCircle.fBottom,
fSigma, fOffset);
return str;
}
static const GrFragmentProcessor* Create(GrTextureProvider*textureProvider,
const SkRect& circle, float sigma) {
float offset;
SkAutoTUnref<GrTexture> blurProfile(CreateCircleBlurProfileTexture(textureProvider,
circle,
sigma,
&offset));
if (!blurProfile) {
return nullptr;
}
return new GrCircleBlurFragmentProcessor(circle, sigma, offset, blurProfile);
}
const SkRect& circle() const { return fCircle; }
float sigma() const { return fSigma; }
float offset() const { return fOffset; }
int profileSize() const { return fBlurProfileAccess.getTexture()->width(); }
private:
GrCircleBlurFragmentProcessor(const SkRect& circle, float sigma,
float offset, GrTexture* blurProfile);
GrGLSLFragmentProcessor* onCreateGLSLInstance() const override;
void onGetGLSLProcessorKey(const GrGLSLCaps& caps, GrProcessorKeyBuilder* b) const override;
bool onIsEqual(const GrFragmentProcessor& other) const override {
const GrCircleBlurFragmentProcessor& cbfp = other.cast<GrCircleBlurFragmentProcessor>();
// fOffset is computed from the circle width and the sigma
return this->circle() == cbfp.circle() && fSigma == cbfp.fSigma;
}
void onComputeInvariantOutput(GrInvariantOutput* inout) const override;
static GrTexture* CreateCircleBlurProfileTexture(GrTextureProvider*,
const SkRect& circle,
float sigma, float* offset);
SkRect fCircle;
float fSigma;
float fOffset;
GrTextureAccess fBlurProfileAccess;
GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
typedef GrFragmentProcessor INHERITED;
};
#endif
#endif
|
