OpenGL extension ARB.map_buffer_range
This module customises the behaviour of the
OpenGL.raw.GL.ARB.map_buffer_range to provide a more
Overview (from the spec)
ARB_map_buffer_range expands the buffer object API to allow greater
performance when a client application only needs to write to a sub-range
of a buffer object. To that end, this extension introduces two new buffer
object features: non-serialized buffer modification and explicit sub-range
flushing for mapped buffer objects.
OpenGL requires that commands occur in a FIFO manner meaning that any
changes to buffer objects either block until the data has been processed by
the OpenGL pipeline or else create extra copies to avoid such a block. By
providing a method to asynchronously modify buffer object data, an
application is then able to manage the synchronization points themselves
and modify ranges of data contained by a buffer object even though OpenGL
might still be using other parts of it.
This extension also provides a method for explicitly flushing ranges of a
mapped buffer object so OpenGL does not have to assume that the entire
range may have been modified. Further, it allows the application to more
precisely specify its intent with respect to reading, writing, and whether
the previous contents of a mapped range of interest need be preserved
prior to modification.
Affects ARB_vertex_buffer_object, ARB_pixel_buffer_object and OpenGL 1.5
The official definition of this extension is available here:
|EXTENSION_NAME = 'GL_ARB_map_buffer_range'|
GL_MAP_FLUSH_EXPLICIT_BIT = GL_MAP_FLUSH_EXPLICIT_BIT
GL_MAP_INVALIDATE_BUFFER_BIT = GL_MAP_INVALIDATE_BUFFER_BIT
GL_MAP_INVALIDATE_RANGE_BIT = GL_MAP_INVALIDATE_RANGE_BIT
GL_MAP_READ_BIT = GL_MAP_READ_BIT
GL_MAP_UNSYNCHRONIZED_BIT = GL_MAP_UNSYNCHRONIZED_BIT
GL_MAP_WRITE_BIT = GL_MAP_WRITE_BIT
__file__ = '/home/mcfletch/pylive/OpenGL/GL/ARB/map_buffer_range.pyc'
__name__ = 'OpenGL.GL.ARB.map_buffer_range'
__package__ = 'OpenGL.GL.ARB'
glFlushMappedBufferRange = <OpenGL.platform.baseplatform.glFlushMappedBufferRange object at 0x7300fd0>
glMapBufferRange = <OpenGL.platform.baseplatform.glMapBufferRange object at 0x731e390>