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'''OpenGL extension NV.internalformat_sample_query
This module customises the behaviour of the
OpenGL.raw.GL.NV.internalformat_sample_query to provide a more
Python-friendly API
Overview (from the spec)
Some OpenGL implementations support modes of multisampling which have
properties which are non-obvious to applications and/or which may not be
standards conformant. The idea of non-conformant AA modes is not new,
and is exposed in both GLX and EGL with config caveats and the
GLX_NON_CONFORMANT_CONFIG for GLX and EGL_NON_CONFORMANT_CONFIG for EGL,
or by querying the EGL_CONFORMANT attribute in newer versions of EGL.
Both of these mechanisms operate on a per-config basis, which works as
intended for window-based configs. However, with the advent of
application-created FBOs, it is now possible to do all the multisample
operations in an application-created FBO and never use a multisample
window.
This extension further extends the internalformat query mechanism
(first introduced by ARB_internalformat_query and extended in
ARB_internalformat_query2) and introduces a mechanism for a
implementation to report properties of formats that may also be
dependent on the number of samples. This includes information
such as whether the combination of format and samples should be
considered conformant. This enables an implementation to report
caveats which might apply to both window and FBO-based rendering
configurations.
Some NVIDIA drivers support multisample modes which are internally
implemented as a combination of multisampling and automatic
supersampling in order to obtain a higher level of anti-aliasing than
can be directly supported by hardware. This extension allows those
properties to be queried by an application with the MULTISAMPLES_NV,
SUPERSAMPLE_SCALE_X_NV and SUPERSAMPLE_SCALE_Y_NV properties. For
example, a 16xAA mode might be implemented by using 4 samples and
up-scaling by a factor of 2 in each of the x- and y-dimensions.
In this example, the driver might report MULTSAMPLES_NV of 4,
SUPERSAMPLE_SCALE_X_NV of 2, SUPERSAMPLE_SCALE_Y_NV of 2 and
CONFORMANT_NV of FALSE.
The official definition of this extension is available here:
http://www.opengl.org/registry/specs/NV/internalformat_sample_query.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.NV.internalformat_sample_query import *
from OpenGL.raw.GL.NV.internalformat_sample_query import _EXTENSION_NAME
def glInitInternalformatSampleQueryNV():
'''Return boolean indicating whether this extension is available'''
from OpenGL import extensions
return extensions.hasGLExtension( _EXTENSION_NAME )
# INPUT glGetInternalformatSampleivNV.params size not checked against bufSize
glGetInternalformatSampleivNV=wrapper.wrapper(glGetInternalformatSampleivNV).setInputArraySize(
'params', None
)
### END AUTOGENERATED SECTION
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