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
|
/* Copyright (C) 2011 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* 0 A.D. is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Allocate and destroy CVertexBuffers
*/
#include "precompiled.h"
#include "VertexBufferManager.h"
#include "lib/ogl.h"
#include "ps/CLogger.h"
#define DUMP_VB_STATS 0 // for debugging
CVertexBufferManager g_VBMan;
///////////////////////////////////////////////////////////////////////////////
// Explicit shutdown of the vertex buffer subsystem.
// This avoids the ordering issues that arise when using destructors of
// global instances.
void CVertexBufferManager::Shutdown()
{
typedef std::list<CVertexBuffer*>::iterator Iter;
for (Iter iter = m_Buffers.begin(); iter != m_Buffers.end(); ++iter)
delete *iter;
m_Buffers.clear();
}
///////////////////////////////////////////////////////////////////////////////
// Allocate: try to allocate a buffer of given number of vertices (each of
// given size), with the given type, and using the given texture - return null
// if no free chunks available
CVertexBuffer::VBChunk* CVertexBufferManager::Allocate(size_t vertexSize, size_t numVertices, GLenum usage, GLenum target)
{
CVertexBuffer::VBChunk* result=0;
ENSURE(usage == GL_STREAM_DRAW || usage == GL_STATIC_DRAW || usage == GL_DYNAMIC_DRAW);
ENSURE(target == GL_ARRAY_BUFFER || target == GL_ELEMENT_ARRAY_BUFFER);
// TODO, RC - run some sanity checks on allocation request
typedef std::list<CVertexBuffer*>::iterator Iter;
#if DUMP_VB_STATS
debug_printf(L"\n============================\n# allocate vsize=%d nverts=%d\n\n", vertexSize, numVertices);
for (Iter iter = m_Buffers.begin(); iter != m_Buffers.end(); ++iter) {
CVertexBuffer* buffer = *iter;
if (buffer->CompatibleVertexType(vertexSize, usage, target))
{
debug_printf(L"%p\n", buffer);
buffer->DumpStatus();
}
}
#endif
// iterate through all existing buffers testing for one that'll
// satisfy the allocation
for (Iter iter = m_Buffers.begin(); iter != m_Buffers.end(); ++iter) {
CVertexBuffer* buffer = *iter;
result = buffer->Allocate(vertexSize, numVertices, usage, target);
if (result)
return result;
}
// got this far; need to allocate a new buffer
CVertexBuffer* buffer = new CVertexBuffer(vertexSize, usage, target);
m_Buffers.push_front(buffer);
result = buffer->Allocate(vertexSize, numVertices, usage, target);
if (!result)
{
LOGERROR(L"Failed to create VBOs (%lu*%lu)", (unsigned long)vertexSize, (unsigned long)numVertices);
}
return result;
}
///////////////////////////////////////////////////////////////////////////////
// Release: return given chunk to its owner
void CVertexBufferManager::Release(CVertexBuffer::VBChunk* chunk)
{
ENSURE(chunk);
#if DUMP_VB_STATS
debug_printf(L"\n============================\n# release %p nverts=%d\n\n", chunk, chunk->m_Count);
#endif
chunk->m_Owner->Release(chunk);
}
size_t CVertexBufferManager::GetBytesReserved()
{
size_t total = 0;
typedef std::list<CVertexBuffer*>::iterator Iter;
for (Iter iter = m_Buffers.begin(); iter != m_Buffers.end(); ++iter)
total += (*iter)->GetBytesReserved();
return total;
}
size_t CVertexBufferManager::GetBytesAllocated()
{
size_t total = 0;
typedef std::list<CVertexBuffer*>::iterator Iter;
for (Iter iter = m_Buffers.begin(); iter != m_Buffers.end(); ++iter)
total += (*iter)->GetBytesAllocated();
return total;
}
|
