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
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
/*
* 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 GrGLVertexArray_DEFINED
#define GrGLVertexArray_DEFINED
#include "GrResource.h"
#include "gl/GrGLFunctions.h"
#include "SkTArray.h"
class GrGLVertexBuffer;
class GrGLIndexBuffer;
class GrGpuGL;
/**
* This sets and tracks the vertex attribute array state. It is used internally by GrGLVertexArray
* (below) but is separate because it is also used to track the state of vertex array object 0.
*/
class GrGLAttribArrayState {
public:
explicit GrGLAttribArrayState(int arrayCount = 0) { this->resize(arrayCount); }
void resize(int newCount) {
fAttribArrayStates.resize_back(newCount);
for (int i = 0; i < newCount; ++i) {
fAttribArrayStates[i].invalidate();
}
}
/**
* This function enables and sets vertex attrib state for the specified attrib index. It is
* assumed that the GrGLAttribArrayState is tracking the state of the currently bound vertex
* array object.
*/
void set(const GrGpuGL*,
int index,
GrGLVertexBuffer*,
GrGLint size,
GrGLenum type,
GrGLboolean normalized,
GrGLsizei stride,
GrGLvoid* offset);
/**
* This function disables vertex attribs not present in the mask. It is assumed that the
* GrGLAttribArrayState is tracking the state of the currently bound vertex array object.
*/
void disableUnusedAttribArrays(const GrGpuGL*, uint64_t usedAttribArrayMask);
void invalidate() {
int count = fAttribArrayStates.count();
for (int i = 0; i < count; ++i) {
fAttribArrayStates[i].invalidate();
}
}
void notifyVertexBufferDelete(GrGLuint id) {
int count = fAttribArrayStates.count();
for (int i = 0; i < count; ++i) {
if (fAttribArrayStates[i].fAttribPointerIsValid &&
id == fAttribArrayStates[i].fVertexBufferID) {
fAttribArrayStates[i].invalidate();
}
}
}
/**
* The number of attrib arrays that this object is configured to track.
*/
int count() const { return fAttribArrayStates.count(); }
private:
/**
* Tracks the state of glVertexAttribArray for an attribute index.
*/
struct AttribArrayState {
void invalidate() {
fEnableIsValid = false;
fAttribPointerIsValid = false;
}
bool fEnableIsValid;
bool fAttribPointerIsValid;
bool fEnabled;
GrGLuint fVertexBufferID;
GrGLint fSize;
GrGLenum fType;
GrGLboolean fNormalized;
GrGLsizei fStride;
GrGLvoid* fOffset;
};
SkSTArray<16, AttribArrayState, true> fAttribArrayStates;
};
/**
* This class represents an OpenGL vertex array object. It manages the lifetime of the vertex array
* and is used to track the state of the vertex array to avoid redundant GL calls.
*/
class GrGLVertexArray : public GrResource {
public:
GrGLVertexArray(GrGpuGL* gpu, GrGLint id, int attribCount);
/**
* Binds this vertex array. If the ID has been deleted or abandoned then NULL is returned.
* Otherwise, the GrGLAttribArrayState that is tracking this vertex array's attrib bindings is
* returned.
*/
GrGLAttribArrayState* bind();
/**
* This is a version of the above function that also binds an index buffer to the vertex
* array object.
*/
GrGLAttribArrayState* bindWithIndexBuffer(const GrGLIndexBuffer* indexBuffer);
void notifyIndexBufferDelete(GrGLuint bufferID);
void notifyVertexBufferDelete(GrGLuint id) {
fAttribArrays.notifyVertexBufferDelete(id);
}
GrGLuint arrayID() const { return fID; }
void invalidateCachedState();
virtual size_t sizeInBytes() const SK_OVERRIDE { return 0; }
protected:
virtual void onAbandon() SK_OVERRIDE;
virtual void onRelease() SK_OVERRIDE;
private:
GrGLuint fID;
GrGLAttribArrayState fAttribArrays;
GrGLuint fIndexBufferID;
bool fIndexBufferIDIsValid;
typedef GrResource INHERITED;
};
#endif
|
