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'''OpenGL extension ARB.shading_language_420pack
This module customises the behaviour of the
OpenGL.raw.GL.ARB.shading_language_420pack to provide a more
Python-friendly API
Overview (from the spec)
This is a language feature only extension formed from changes made
to version 4.20 of GLSL. It includes:
* Add line-continuation using '\', as in C++.
* Change from ASCII to UTF-8 for the language character set and also
allow any characters inside comments.
* Allow implicit conversions of return values to the declared type of
the function.
* The *const* keyword can be used to declare variables within a function
body with initializer expressions that are not constant expressions.
* Qualifiers on variable declarations no longer have to follow a strict
order. The layout qualifier can be used multiple times, and multiple
parameter qualifiers can be used. However, this is not as
straightforward as saying declarations have arbitrary lists of
initializers. Typically, one qualifier from each class of qualifiers
is allowed, so care is now taken to classify them and say so. Then,
of these, order restrictions are removed.
* Add layout qualifier identifier "binding" to bind the location of a
uniform block. This requires version 1.4 of GLSL. If this extension
is used with an earlier version than 1.4, this feature is not present.
* Add layout qualifier identifier "binding" to bind units to sampler
and image variable declarations.
* Add C-style curly brace initializer lists syntax for initializers.
Full initialization of aggregates is required when these are used.
* Allow ".length()" to be applied to vectors and matrices, returning
the number of components or columns.
* Allow swizzle operations on scalars.
* Built-in constants for gl_MinProgramTexelOffset and
gl_MaxProgramTexelOffset.
The official definition of this extension is available here:
http://www.opengl.org/registry/specs/ARB/shading_language_420pack.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.ARB.shading_language_420pack import *
from OpenGL.raw.GL.ARB.shading_language_420pack import _EXTENSION_NAME
def glInitShadingLanguage420PackARB():
'''Return boolean indicating whether this extension is available'''
from OpenGL import extensions
return extensions.hasGLExtension( _EXTENSION_NAME )
### END AUTOGENERATED SECTION
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