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evil hack: map the buffer once and use this pointer after unmaping

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This isn't allowed by gl and may _only_ work, if the driver uses cpu bound buffer.
But it may speed up :-)
This commit is contained in:
degasus 2013-02-05 00:53:14 +01:00
parent f677b8cba3
commit 1d86dafbe2
2 changed files with 15 additions and 1 deletions
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15
Source/Plugins/Plugin_VideoOGL/Src/StreamBuffer.cpp
View file

@ -41,7 +41,7 @@ StreamBuffer::StreamBuffer(u32 type, size_t size, StreamType uploadType)
if(g_Config.backend_info.bSupportsGLPinnedMemory)
m_uploadtype = PINNED_MEMORY;
else
m_uploadtype = MAP_AND_SYNC;
m_uploadtype = MAP_AND_RISK;
}
Init();
@ -73,6 +73,7 @@ void StreamBuffer::Alloc ( size_t size, u32 stride )
break;
case MAP_AND_SYNC:
case PINNED_MEMORY:
case MAP_AND_RISK:
// insert waiting slots for used memory
for(u32 i=SLOT(m_used_iterator); i<SLOT(m_iterator); i++)
@ -133,6 +134,7 @@ size_t StreamBuffer::Upload ( u8* data, size_t size )
}
break;
case PINNED_MEMORY:
case MAP_AND_RISK:
memcpy(pointer+m_iterator, data, size);
break;
case BUFFERSUBDATA:
@ -174,6 +176,16 @@ void StreamBuffer::Init()
glBindBuffer(GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD, 0);
glBindBuffer(m_buffertype, m_buffer);
break;
case MAP_AND_RISK:
fences = new GLsync[SYNC_POINTS];
for(u32 i=0; i<SYNC_POINTS; i++)
fences[i] = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
glBindBuffer(m_buffertype, m_buffer);
glBufferData(m_buffertype, m_size, NULL, GL_STREAM_DRAW);
pointer = (u8*)glMapBuffer(m_buffertype, GL_WRITE_ONLY);
glUnmapBuffer(m_buffertype);
case STREAM_DETECT:
break;
}
@ -183,6 +195,7 @@ void StreamBuffer::Shutdown()
{
switch(m_uploadtype) {
case MAP_AND_SYNC:
case MAP_AND_RISK:
for(u32 i=0; i<SYNC_POINTS; i++)
glDeleteSync(fences[i]);
delete [] fences;

1
Source/Plugins/Plugin_VideoOGL/Src/StreamBuffer.h
View file

@ -29,6 +29,7 @@ enum StreamType {
STREAM_DETECT,
MAP_AND_ORPHAN,
MAP_AND_SYNC,
MAP_AND_RISK,
PINNED_MEMORY,
BUFFERSUBDATA
};