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'''OpenGL extension ARB.texture_rectangle
Overview (from the spec)
OpenGL texturing is limited to images with power-of-two dimensions
and an optional 1-texel border. The ARB_texture_rectangle extension
adds a new texture target that supports 2D textures without requiring
power-of-two dimensions.
Non-power-of-two sized (NPOTS) textures are useful for storing video
images that do not have power-of-two sized (POTS). Re-sampling
artifacts are avoided and less texture memory may be required by
using non-power-of-two sized textures. Non-power-of-two sized
textures are also useful for shadow maps and window-space texturing.
However, non-power-of-two sized textures have limitations that
do not apply to power-of-two sized textures. NPOTS textures may
not use mipmap filtering; POTS textures support both mipmapped
and non-mipmapped filtering. NPOTS textures support only the
GL_CLAMP, GL_CLAMP_TO_EDGE, and GL_CLAMP_TO_BORDER wrap modes;
POTS textures support GL_CLAMP_TO_EDGE, GL_REPEAT, GL_CLAMP,
GL_MIRRORED_REPEAT, and GL_CLAMP_TO_BORDER (and GL_MIRROR_CLAMP_ATI
and GL_MIRROR_CLAMP_TO_EDGE_ATI if ATI_texture_mirror_once is
supported) . NPOTS textures do not support an optional 1-texel
border; POTS textures do support an optional 1-texel border.
NPOTS textures are accessed by dimension-dependent (aka
non-normalized) texture coordinates. So instead of thinking of
the texture image lying in a [0..1]x[0..1] range, the NPOTS texture
image lies in a [0..w]x[0..h] range.
This extension adds a new texture target and related state (proxy,
binding, max texture size).
The official definition of this extension is available here:
http://oss.sgi.com/projects/ogl-sample/registry/ARB/texture_rectangle.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_ARB_texture_rectangle'
GL_TEXTURE_RECTANGLE_ARB = constant.Constant( 'GL_TEXTURE_RECTANGLE_ARB', 0x84F5 )
GL_TEXTURE_BINDING_RECTANGLE_ARB = constant.Constant( 'GL_TEXTURE_BINDING_RECTANGLE_ARB', 0x84F6 )
GL_PROXY_TEXTURE_RECTANGLE_ARB = constant.Constant( 'GL_PROXY_TEXTURE_RECTANGLE_ARB', 0x84F7 )
GL_MAX_RECTANGLE_TEXTURE_SIZE_ARB = constant.Constant( 'GL_MAX_RECTANGLE_TEXTURE_SIZE_ARB', 0x84F8 )
def glInitTextureRectangleARB():
'''Return boolean indicating whether this extension is available'''
return extensions.hasGLExtension( EXTENSION_NAME )
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