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
|
/*
* Copyright 2010 Inalogic® Inc.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License, as
* published by the Free Software Foundation; either version 2.1 or 3.0
* of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranties of
* MERCHANTABILITY, SATISFACTORY QUALITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the applicable version of the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of both the GNU Lesser General Public
* License along with this program. If not, see <http://www.gnu.org/licenses/>
*
* Authored by: Jay Taoko <jaytaoko@inalogic.com>
*
*/
#include "GpuDevice.h"
#include "GLDeviceObjects.h"
#include "IOpenGLIndexBuffer.h"
namespace nux
{
NUX_IMPLEMENT_OBJECT_TYPE(IOpenGLIndexBuffer);
IOpenGLIndexBuffer::IOpenGLIndexBuffer(unsigned int Length, VBO_USAGE Usage, INDEX_FORMAT Format, NUX_FILE_LINE_DECL)
: IOpenGLResource(RTINDEXBUFFER, NUX_FILE_LINE_PARAM)
, _Length(Length)
, _Format(Format)
, _Usage(Usage)
, _MemMap(0)
, _OffsetToLock(0)
, _SizeToLock(0)
{
CHECKGL(glGenBuffersARB(1, &_OpenGLID));
CHECKGL(glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, _OpenGLID));
CHECKGL(glBufferDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB, _Length, NULL, Usage));
CHECKGL(glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0));
GRunTimeStats.Register(this);
}
IOpenGLIndexBuffer::~IOpenGLIndexBuffer()
{
CHECKGL(glDeleteBuffersARB(1, &_OpenGLID));
_OpenGLID = 0;
GRunTimeStats.UnRegister(this);
}
int IOpenGLIndexBuffer::Lock(
unsigned int OffsetToLock,
unsigned int SizeToLock,
void **ppbData)
{
nuxAssert(SizeToLock <= _Length);
nuxAssert(OffsetToLock + SizeToLock <= _Length);
if (SizeToLock == 0)
{
if (OffsetToLock == 0)
{
// lock the entire buffer
SizeToLock = _Length;
}
else
return OGL_INVALID_CALL;
}
// If _MemMap, _OffsetToLock and _SizeToLock are not equal to zero, then we have already mapped the buffer
// Unlock it before locking again.
nuxAssert(_MemMap == 0);
nuxAssert(_OffsetToLock == 0);
nuxAssert(_SizeToLock == 0);
CHECKGL(glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, _OpenGLID));
// Map the Entire buffer into system memory
#ifndef NUX_OPENGLES_20
_MemMap = (BYTE *) glMapBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB); // todo: use Format instead of GL_WRITE_ONLY_ARB
CHECKGL_MSG(glMapBufferARB);
*ppbData = (void *) (_MemMap + OffsetToLock);
#else
_MemMap = new BYTE[SizeToLock];
*ppbData = _MemMap;
#endif
_OffsetToLock = OffsetToLock;
_SizeToLock = SizeToLock;
CHECKGL(glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0));
return OGL_OK;
}
int IOpenGLIndexBuffer::Unlock()
{
nuxAssert(_MemMap != 0);
nuxAssert(_SizeToLock != 0);
// No need to bind
CHECKGL(glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, _OpenGLID));
#ifndef NUX_OPENGLES_20
CHECKGL(glUnmapBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB));
#else
CHECKGL(glBufferSubData(GL_ELEMENT_ARRAY_BUFFER_ARB, _OffsetToLock, _SizeToLock, _MemMap));
delete [] _MemMap;
#endif
CHECKGL(glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0));
_MemMap = 0;
_OffsetToLock = 0;
_SizeToLock = 0;
return OGL_OK;
}
int IOpenGLIndexBuffer::GetStride()
{
if (_Format == INDEX_FORMAT_USHORT)
{
return 2;
}
else if (_Format == INDEX_FORMAT_UINT)
{
return 4;
}
else
return 0;
}
void IOpenGLIndexBuffer::BindIndexBuffer()
{
CHECKGL(glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, _OpenGLID));
}
unsigned int IOpenGLIndexBuffer::GetSize()
{
return _Length;
}
}
|