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'''OpenGL extension ATI.pixel_format_float
Overview (from the spec)
This extension adds pixel formats with floating-point RGBA color
components.
The size of each float components is specified using the same
WGL_RED_BITS_ARB, WGL_GREEN_BITS_ARB, WGL_BLUE_BITS_ARB and
WGL_ALPHA_BITS_ARB pixel format attributes that are used for
defining the size of fixed-point components. 32 bit floating-
point components are in the standard IEEE float format. 16 bit
floating-point components have 1 sign bit, 5 exponent bits,
and 10 mantissa bits.
In standard OpenGL RGBA color components are normally clamped to
the range [0,1]. The color components of a float buffer are
clamped to the limits of the range representable by their format.
The official definition of this extension is available here:
http://oss.sgi.com/projects/ogl-sample/registry/ATI/pixel_format_float.txt
Automatically generated by the get_gl_extensions script, do not edit!
'''
from OpenGL import platform, constants, constant, arrays
from OpenGL import extensions
from OpenGL.GL import glget
import ctypes
EXTENSION_NAME = 'GL_ATI_pixel_format_float'
GL_TYPE_RGBA_FLOAT_ATI = constant.Constant( 'GL_TYPE_RGBA_FLOAT_ATI', 0x8820 )
GL_COLOR_CLEAR_UNCLAMPED_VALUE_ATI = constant.Constant( 'GL_COLOR_CLEAR_UNCLAMPED_VALUE_ATI', 0x8835 )
glget.addGLGetConstant( GL_COLOR_CLEAR_UNCLAMPED_VALUE_ATI, (4,) )
def glInitPixelFormatFloatATI():
'''Return boolean indicating whether this extension is available'''
return extensions.hasGLExtension( EXTENSION_NAME )
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