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'''OpenGL extension NV.texture_rectangle
Overview (from the spec)
OpenGL texturing is limited to images with power-of-two dimensions
and an optional 1-texel border. NV_texture_rectangle extension
adds a new texture target that supports 2D textures without requiring
power-of-two dimensions.
Non-power-of-two dimensioned textures are useful for storing
video images that do not have power-of-two dimensions. Re-sampling
artifacts are avoided and less texture memory may be required by using
non-power-of-two dimensioned textures. Non-power-of-two dimensioned
textures are also useful for shadow maps and window-space texturing.
However, non-power-of-two dimensioned (NPOTD) textures have
limitations that do not apply to power-of-two dimensioned (POT)
textures. NPOTD textures may not use mipmap filtering; POTD
textures support both mipmapped and non-mipmapped filtering.
NPOTD textures support only the GL_CLAMP, GL_CLAMP_TO_EDGE,
and GL_CLAMP_TO_BORDER_ARB wrap modes; POTD textures support
GL_CLAMP_TO_EDGE, GL_REPEAT, GL_CLAMP, GL_MIRRORED_REPEAT_IBM,
and GL_CLAMP_TO_BORDER. NPOTD textures do not support an optional
1-texel border; POTD textures do support an optional 1-texel border.
NPOTD textures are accessed by non-normalized texture coordinates.
So instead of thinking of the texture image lying in a [0..1]x[0..1]
range, the NPOTD 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/NV/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_NV_texture_rectangle'
GL_TEXTURE_RECTANGLE_NV = constant.Constant( 'GL_TEXTURE_RECTANGLE_NV', 0x84F5 )
glget.addGLGetConstant( GL_TEXTURE_RECTANGLE_NV, (1,) )
GL_TEXTURE_BINDING_RECTANGLE_NV = constant.Constant( 'GL_TEXTURE_BINDING_RECTANGLE_NV', 0x84F6 )
glget.addGLGetConstant( GL_TEXTURE_BINDING_RECTANGLE_NV, (1,) )
GL_PROXY_TEXTURE_RECTANGLE_NV = constant.Constant( 'GL_PROXY_TEXTURE_RECTANGLE_NV', 0x84F7 )
GL_MAX_RECTANGLE_TEXTURE_SIZE_NV = constant.Constant( 'GL_MAX_RECTANGLE_TEXTURE_SIZE_NV', 0x84F8 )
glget.addGLGetConstant( GL_MAX_RECTANGLE_TEXTURE_SIZE_NV, (1,) )
def glInitTextureRectangleNV():
'''Return boolean indicating whether this extension is available'''
return extensions.hasGLExtension( EXTENSION_NAME )
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