blob: d147aac3c147e888d993ba0c39f3306f068aa38e (
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
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
93
94
95
96
97
98
|
/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrGLSLCaps_DEFINED
#define GrGLSLCaps_DEFINED
#include "GrCaps.h"
#include "GrGLSL.h"
class GrGLSLCaps : public GrShaderCaps {
public:
/**
* Indicates how GLSL must interact with advanced blend equations. The KHR extension requires
* special layout qualifiers in the fragment shader.
*/
enum AdvBlendEqInteraction {
kNotSupported_AdvBlendEqInteraction, //<! No _blend_equation_advanced extension
kAutomatic_AdvBlendEqInteraction, //<! No interaction required
kGeneralEnable_AdvBlendEqInteraction, //<! layout(blend_support_all_equations) out
kSpecificEnables_AdvBlendEqInteraction, //<! Specific layout qualifiers per equation
kLast_AdvBlendEqInteraction = kSpecificEnables_AdvBlendEqInteraction
};
/**
* Initializes the GrGLSLCaps to a default set of features
*/
GrGLSLCaps(const GrContextOptions&);
/**
* Some helper functions for encapsulating various extensions to read FB Buffer on openglES
*
* TODO(joshualitt) On desktop opengl 4.2+ we can achieve something similar to this effect
*/
bool fbFetchSupport() const { return fFBFetchSupport; }
bool fbFetchNeedsCustomOutput() const { return fFBFetchNeedsCustomOutput; }
bool bindlessTextureSupport() const { return fBindlessTextureSupport; }
const char* fbFetchColorName() const { return fFBFetchColorName; }
const char* fbFetchExtensionString() const { return fFBFetchExtensionString; }
bool dropsTileOnZeroDivide() const { return fDropsTileOnZeroDivide; }
AdvBlendEqInteraction advBlendEqInteraction() const { return fAdvBlendEqInteraction; }
bool mustEnableAdvBlendEqs() const {
return fAdvBlendEqInteraction >= kGeneralEnable_AdvBlendEqInteraction;
}
bool mustEnableSpecificAdvBlendEqs() const {
return fAdvBlendEqInteraction == kSpecificEnables_AdvBlendEqInteraction;
}
bool mustDeclareFragmentShaderOutput() const {
return fGLSLGeneration > k110_GrGLSLGeneration;
}
bool usesPrecisionModifiers() const { return fUsesPrecisionModifiers; }
GrGLSLGeneration generation() const { return fGLSLGeneration; }
/**
* Returns a string containing the caps info.
*/
SkString dump() const override;
private:
GrGLSLGeneration fGLSLGeneration;
bool fDropsTileOnZeroDivide : 1;
bool fFBFetchSupport : 1;
bool fFBFetchNeedsCustomOutput : 1;
bool fBindlessTextureSupport : 1;
bool fUsesPrecisionModifiers : 1;
const char* fFBFetchColorName;
const char* fFBFetchExtensionString;
AdvBlendEqInteraction fAdvBlendEqInteraction;
friend class GrGLCaps; // For initialization.
typedef GrShaderCaps INHERITED;
};
#endif
|
