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OpenGL: change StreamBuffer in a streaming way

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This is a bit slower on map_and_* because of flushing and _very_ much slower on buffer(sub)?data because of a new memcpy.
But this design allow us to decode directly into a gpu buffer, eg vertexloader will profit :)
This commit is contained in:
degasus
2014-01-22 18:02:55 +01:00
parent 650bae12e1
commit be1fee6d74
4 changed files with 66 additions and 67 deletions
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13
Source/Core/VideoBackends/OGL/VertexManager.cpp
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@ -39,7 +39,7 @@ namespace OGL
{
//This are the initially requested size for the buffers expressed in bytes
const u32 MAX_IBUFFER_SIZE = 2*1024*1024;
const u32 MAX_VBUFFER_SIZE = 16*1024*1024;
const u32 MAX_VBUFFER_SIZE = 32*1024*1024;
static StreamBuffer *s_vertexBuffer;
static StreamBuffer *s_indexBuffer;
@ -85,12 +85,14 @@ void VertexManager::PrepareDrawBuffers(u32 stride)
u32 vertex_data_size = IndexGenerator::GetNumVerts() * stride;
u32 index_data_size = IndexGenerator::GetIndexLen() * sizeof(u16);
s_vertexBuffer->Alloc(vertex_data_size, stride);
size_t offset = s_vertexBuffer->Upload(GetVertexBuffer(), vertex_data_size);
u8* buffer = s_vertexBuffer->Map(vertex_data_size, stride);
memcpy(buffer, GetVertexBuffer(), vertex_data_size);
size_t offset = s_vertexBuffer->Unmap(vertex_data_size);
s_baseVertex = offset / stride;
s_indexBuffer->Alloc(index_data_size);
s_index_offset = s_indexBuffer->Upload((u8*)GetIndexBuffer(), index_data_size);
buffer = s_indexBuffer->Map(index_data_size);
memcpy(buffer, GetIndexBuffer(), index_data_size);
s_index_offset = s_indexBuffer->Unmap(index_data_size);
ADDSTAT(stats.thisFrame.bytesVertexStreamed, vertex_data_size);
ADDSTAT(stats.thisFrame.bytesIndexStreamed, index_data_size);
@ -234,4 +236,5 @@ void VertexManager::vFlush()
GL_REPORT_ERRORD();
}
} // namespace