FGFS-4.1/OpenSceneGraph
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add first step toward PERSISTANT buffer

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This commit is contained in:
mp3butcher 2018-01-29 04:09:10 +01:00
parent 60ed2eff7b
commit 743bd7ae71
2 changed files with 74 additions and 16 deletions
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1
include/osg/BufferObject
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@ -273,6 +273,7 @@ class OSG_EXPORT GLBufferObject : public GraphicsObject
public:
GLExtensions* _extensions;
GLvoid* _persistantDMA;
};

71
src/osg/BufferObject.cpp
View File

@ -62,7 +62,8 @@ GLBufferObject::GLBufferObject(unsigned int contextID, BufferObject* bufferObjec
_previous(0),
_next(0),
_frameLastUsed(0),
_extensions(0)
_extensions(0),
_persistantDMA(0)
{
assign(bufferObject);
@ -121,7 +122,7 @@ void GLBufferObject::clear()
void GLBufferObject::compileBuffer()
{
_dirty = false;
_persistantDMA=0;
_bufferEntries.reserve(_bufferObject->getNumBufferData());
bool compileAll = false;
@ -213,11 +214,31 @@ void GLBufferObject::compileBuffer()
_allocatedSize = _profile._size;
OSG_INFO<<" Allocating new glBufferData(), _allocatedSize="<<_allocatedSize<<std::endl;
_profile._mappingbitfield=GL_MAP_WRITE_BIT|GL_MAP_READ_BIT; //DEBUG
const osg::Array* array = _bufferEntries.begin()->dataSource->asArray();
if(array)_profile._mappingbitfield= GL_MAP_PERSISTENT_BIT| GL_MAP_WRITE_BIT| GL_MAP_COHERENT_BIT; //DEBUG
if(_profile._mappingbitfield != 0)
{
_extensions->glBufferStorage(_profile._target, _profile._size, NULL, _profile._mappingbitfield);
if(_profile._mappingbitfield & GL_MAP_PERSISTENT_BIT ){
///debug invalidate mapping
if(_persistantDMA){
_extensions->glUnmapBuffer(_profile._target);
_persistantDMA=0;
}
_persistantDMA = _extensions->glMapBufferRange(
_profile._target,
0,
_profile._size,
_profile._mappingbitfield |GL_MAP_INVALIDATE_RANGE_BIT|GL_MAP_FLUSH_EXPLICIT_BIT
);
GLenum err=glGetError();
if(err!=GL_NO_ERROR){
OSG_WARN<<" error"<<err<<std::endl;
}
}
}
else
{
@ -249,21 +270,57 @@ void GLBufferObject::compileBuffer()
}
else
{
const osg::Array* array = entry.dataSource->asArray();
if(_profile._mappingbitfield != 0 )
{
///GL_DYNAMIC_STORAGE_BIT, GL_MAP_READ_BIT GL_MAP_WRITE_BIT, GL_MAP_PERSISTENT_BIT, GL_MAP_COHERENT_BIT, and GL_CLIENT_STORAGE_BIT.
/// first time : ownership transfer
if(_profile._mappingbitfield & GL_MAP_PERSISTENT_BIT)
{
///TODO AVOID dirty
if(_persistantDMA){
GLvoid* src=const_cast<GLvoid*>(entry.dataSource->getDataPointer());
if( src)memcpy((unsigned char*)_persistantDMA+entry.offset,src,entry.dataSize);
else OSG_WARN<<" GL_MAP_PERSISTENT_BIT problem"<<std::endl;
_extensions->glFlushMappedBufferRange(_profile._target,
(GLintptr)entry.offset,
(GLsizeiptr)entry.dataSize
);
GLenum err=glGetError();
if(err!=GL_NO_ERROR){
OSG_WARN<<" error"<<err<<std::endl;
}
}
//todo *dst=src;
// _extensions->glUnmapBuffer(_profile._target);
}
else
if(_profile._mappingbitfield & GL_MAP_WRITE_BIT)
{ ///GL_MAP_WRITE_BIT classic upload
GLvoid* src=const_cast<GLvoid*>(entry.dataSource->getDataPointer()),
*dst = _extensions->glMapBufferRange(
_profile._target,
(GLintptr)entry.offset,
(GLsizeiptr)entry.dataSize,
_profile._mappingbitfield//|GL_MAP_INVALIDATE_RANGE_BIT
_profile._mappingbitfield
);
memcpy(dst,src,entry.dataSize);
//entry.dataSource->getDataPointer()=dst;
_extensions->glUnmapBuffer(_profile._target);
}
else
{
/// Readback buffer
GLvoid* dst=const_cast<GLvoid*>(entry.dataSource->getDataPointer()),
*src = _extensions->glMapBufferRange(
_profile._target,
(GLintptr)entry.offset,
(GLsizeiptr)entry.dataSize,
_profile._mappingbitfield
);
memcpy(dst,src,entry.dataSize);
_extensions->glUnmapBuffer(_profile._target);
}
}
else
{