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'''OpenGL extension NVX.gpu_memory_info
This module customises the behaviour of the
OpenGL.raw.GL.NVX.gpu_memory_info to provide a more
Python-friendly API
Overview (from the spec)
Most graphics systems offer a limited amount of onboard
high-performance memory for storing textures, geometric
primitives, and other data used for rendering.
OpenGL implementations are expected to manage the residence of
objects (that is, the memory pools in which objects are placed)
automatically. This is simple for applications to use, and the
high level of abstraction allows many different underlying
hardware implementations. However performance sensitive
applications that are willing to adjust their usage of these memory
resources in order to maintain their desired performance are unable
to determine when the limited onboard memory resources are
approaching full utilization and swapping (with its related
performance impact) is imminent.
GL_NVX_gpu_memory_info provides applications visibility into GPU
hardware memory utilization in order to allow the application to
effectively manage its resource allocations in the scope of the
current available GPU memory. This information is made available
to the applications in the form of the total available resource
size (after initial system allocations) and the current available
resource (e.g. free memory) as well as a count of the number and
total size of evictions of data from GPU memory since the last time
this information was queried from this context using this extension.
The official definition of this extension is available here:
http://www.opengl.org/registry/specs/NVX/gpu_memory_info.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.NVX.gpu_memory_info import *
from OpenGL.raw.GL.NVX.gpu_memory_info import _EXTENSION_NAME
def glInitGpuMemoryInfoNVX():
'''Return boolean indicating whether this extension is available'''
from OpenGL import extensions
return extensions.hasGLExtension( _EXTENSION_NAME )
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