OpenGL.GL.APPLE.flush_buffer_range

OpenGL extension APPLE.flush_buffer_range

This module customises the behaviour of the OpenGL.raw.GL.APPLE.flush_buffer_range to provide a more Python-friendly API

Overview (from the spec)

APPLE_flush_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.

Affects ARB_vertex_buffer_object, ARB_pixel_buffer_object and OpenGL 1.5 Buffer Objects.

The official definition of this extension is available here: http://www.opengl.org/registry/specs/APPLE/flush_buffer_range.txt