lib/python3.9/site-packages/OpenGL/GL/APPLE/flush_buffer_range.py

'''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
'''
from OpenGL import platform, constant, arrays
from OpenGL import extensions, wrapper
import ctypes
from OpenGL.raw.GL import _types, _glgets
from OpenGL.raw.GL.APPLE.flush_buffer_range import *
from OpenGL.raw.GL.APPLE.flush_buffer_range import _EXTENSION_NAME

def glInitFlushBufferRangeAPPLE():
    '''Return boolean indicating whether this extension is available'''
    from OpenGL import extensions
    return extensions.hasGLExtension( _EXTENSION_NAME )


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