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"""OpenGL version 1.3 imaging-handling routines"""
from OpenGL import wrapper, constants, arrays
from OpenGL.raw.GL.VERSION import GL_1_3 as simple
from OpenGL.GL import images, glget
for dimensions in (1,2,3):
for function in ('glCompressedTexImage%sD','glCompressedTexSubImage%sD'):
name = function%(dimensions,)
globals()[ name ] = images.compressedImageFunction(
getattr( simple, name )
)
del name, function
del dimensions
if simple.glGetCompressedTexImage:
def glGetCompressedTexImage( target, level, img=None ):
"""Retrieve a compressed texture image"""
if img is None:
length = glget.glGetTexLevelParameteriv(
target, 0,
simple.GL_TEXTURE_COMPRESSED_IMAGE_SIZE_ARB,
)
img = arrays.ArrayDataType.zeros( (length,), constants.GL_UNSIGNED_BYTE )
return simple.glGetCompressedTexImage(target, 0, img);
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