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Improve PBO writer performance

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This commit is contained in:
Logan McNaughton 2017-02-05 10:18:14 +07:00 committed by Sergey Lipskiy
parent 7fe2b40cad
commit d5052c0c70
1 changed files with 57 additions and 1 deletions
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58
src/Graphics/OpenGLContext/opengl_BufferManipulationObjectFactory.cpp
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@ -144,7 +144,7 @@ public:
{
if (_size > m_size)
_size = m_size;
return glMapBufferRange(GL_PIXEL_UNPACK_BUFFER, 0, _size, GL_MAP_WRITE_BIT);
return glMapBufferRange(GL_PIXEL_UNPACK_BUFFER, 0, _size, GL_MAP_WRITE_BIT | GL_MAP_UNSYNCHRONIZED_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);
}
void closeWriteBuffer() override
@ -170,6 +170,60 @@ private:
GLuint m_PBO;
};
class PersistentWriteBuffer : public graphics::PixelWriteBuffer
{
public:
PersistentWriteBuffer(CachedBindBuffer * _bind, size_t _size)
: m_bind(_bind)
, m_size(_size)
{
glGenBuffers(1, &m_PBO);
m_bind->bind(graphics::Parameter(GL_PIXEL_UNPACK_BUFFER), graphics::ObjectHandle(m_PBO));
glBufferStorage(GL_PIXEL_UNPACK_BUFFER, m_size * 6, nullptr, GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT | GL_MAP_COHERENT_BIT);
m_bufferData = glMapBufferRange(GL_PIXEL_UNPACK_BUFFER, 0, m_size * 6, GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT | GL_MAP_COHERENT_BIT);
m_bufferOffset = 0;
m_bind->bind(graphics::Parameter(GL_PIXEL_UNPACK_BUFFER), graphics::ObjectHandle());
}
~PersistentWriteBuffer() {
glDeleteBuffers(1, &m_PBO);
m_PBO = 0;
}
void * getWriteBuffer(size_t _size) override
{
if (_size > m_size)
_size = m_size;
if (m_bufferOffset + _size > m_size * 6)
m_bufferOffset = 0;
return (char*)m_bufferData + m_bufferOffset;
}
void closeWriteBuffer() override
{
m_bufferOffset += m_size;
}
void * getData() override {
return nullptr;
}
void bind() override {
m_bind->bind(graphics::Parameter(GL_PIXEL_UNPACK_BUFFER), graphics::ObjectHandle(m_PBO));
}
void unbind() override {
m_bind->bind(graphics::Parameter(GL_PIXEL_UNPACK_BUFFER), graphics::ObjectHandle());
}
private:
CachedBindBuffer * m_bind;
size_t m_size;
void* m_bufferData;
u32 m_bufferOffset;
GLuint m_PBO;
};
class MemoryWriteBuffer : public graphics::PixelWriteBuffer
{
public:
@ -525,6 +579,8 @@ CreatePixelWriteBuffer * BufferManipulationObjectFactory::createPixelWriteBuffer
{
if (m_glInfo.isGLES2)
return new CreatePixelWriteBufferT<MemoryWriteBuffer>(nullptr);
if (m_glInfo.bufferStorage)
return new CreatePixelWriteBufferT<PersistentWriteBuffer>(m_cachedFunctions.getCachedBindBuffer());
return new CreatePixelWriteBufferT<PBOWriteBuffer>(m_cachedFunctions.getCachedBindBuffer());
}