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Implemented texture and VBO swapping system that keeps GPU memory utilization within limits

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--HG--
extra : convert_revision : svn%3A7752d6cf-9f14-4ad2-affc-04f1e67b81a5/trunk%4091
This commit is contained in:
kearwood
2012-09-11 04:32:04 +00:00
parent 34c7dc7b53
commit 754496fe06
12 changed files with 65 additions and 16 deletions
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12
KREngine/KREngine/Classes/KRModelManager.cpp
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@@ -36,6 +36,7 @@
KRModelManager::KRModelManager(KRContext &context) : KRContextObject(context) {
m_currentVBO.handle = 0;
m_currentVBO.data = NULL;
m_vboMemUsed = 0;
}
KRModelManager::~KRModelManager() {
@@ -74,20 +75,23 @@ void KRModelManager::bindVBO(const GLvoid *data, GLsizeiptr size) {
assert(m_currentVBO.size == size);
glBindBuffer(GL_ARRAY_BUFFER, m_currentVBO.handle);
} else {
m_vboMemUsed += size;
while(m_vbos.size() >= KRENGINE_MAX_VBO_HANDLES) {
while(m_vbos.size() >= KRENGINE_MAX_VBO_HANDLES || m_vboMemUsed >= KRENGINE_MAX_VBO_MEM) {
// TODO - This should maintain a max size limit for VBO's rather than a limit on the number of VBO's. As meshes are split to multiple small VBO's, this is not too bad, but still not optimial.
std::map<const GLvoid *, vbo_info_type>::iterator first_itr = m_vbos.begin();
vbo_info_type firstVBO = first_itr->second;
glDeleteBuffers(1, &firstVBO.handle);
m_vboMemUsed -= firstVBO.size;
m_vbos.erase(first_itr);
fprintf(stderr, "VBO Swapping...");
fprintf(stderr, "VBO Swapping...\n");
}
m_currentVBO.handle = -1;
glGenBuffers(1, &m_currentVBO.handle);
glBindBuffer(GL_ARRAY_BUFFER, m_currentVBO.handle);
glBufferData(GL_ARRAY_BUFFER, size, data, GL_STATIC_DRAW);
m_currentVBO.size = size;
m_currentVBO.data = data;
@@ -96,3 +100,7 @@ void KRModelManager::bindVBO(const GLvoid *data, GLsizeiptr size) {
}
}
long KRModelManager::getMemUsed()
{
return m_vboMemUsed;
}