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Potentially improve automatic batching performance slightly on nvidia/intel GPUs.

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This commit is contained in:
Alex Szpakowski
2019-06-01 15:06:19 -03:00
parent 51d0733943
commit ddef70e141
1 changed files with 14 additions and 4 deletions
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src/modules/graphics/opengl/StreamBuffer.cpp
+14 -4
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@@ -301,11 +301,14 @@ class StreamBufferPersistentMapSync final : public StreamBufferSync, public Vola
{
public:
StreamBufferPersistentMapSync(BufferType type, size_t size)
// Coherent mapping is supposedly faster on intel/nvidia aside from a couple
// old nvidia GPUs.
StreamBufferPersistentMapSync(BufferType type, size_t size, bool coherent = true)
: StreamBufferSync(type, size)
, vbo(0)
, glMode(OpenGL::getGLBufferType(mode))
, data(nullptr)
, coherent(coherent)
{
loadVolatile();
}
@@ -330,8 +333,11 @@ public:
{
size_t offset = (frameIndex * bufferSize) + frameGPUReadOffset;
gl.bindBuffer(mode, vbo);
glFlushMappedBufferRange(glMode, offset, usedsize);
if (!coherent)
{
gl.bindBuffer(mode, vbo);
glFlushMappedBufferRange(glMode, offset, usedsize);
}
return offset;
}
@@ -347,7 +353,10 @@ public:
gl.bindBuffer(mode, vbo);
GLbitfield storageflags = GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT;
GLbitfield mapflags = GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT | GL_MAP_UNSYNCHRONIZED_BIT | GL_MAP_FLUSH_EXPLICIT_BIT;
GLbitfield mapflags = GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT;
storageflags |= (coherent ? GL_MAP_COHERENT_BIT : 0);
mapflags |= (coherent ? GL_MAP_COHERENT_BIT : GL_MAP_FLUSH_EXPLICIT_BIT);
glBufferStorage(glMode, bufferSize * BUFFER_FRAMES, nullptr, storageflags);
data = (uint8 *) glMapBufferRange(glMode, 0, bufferSize * BUFFER_FRAMES, mapflags);
@@ -377,6 +386,7 @@ private:
GLuint vbo;
GLenum glMode;
uint8 *data;
bool coherent;
}; // StreamBufferPersistentMapSync