glClampColor man page on Darwin

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GLCLAMPCOLOR(3G)		  OpenGL 3.3		      GLCLAMPCOLOR(3G)

NAME
       glClampColor - specify whether data read via glReadPixels() should be
       clamped

C SPECIFICATION
       void glClampColor(GLenum target, GLenum clamp);

PARAMETERS
       target
	   Target for color clamping.  target must be GL_CLAMP_READ_COLOR.

       clamp
	   Specifies whether to apply color clamping.  clamp must be GL_TRUE
	   or GL_FALSE.

DESCRIPTION
       glClampColor controls color clamping that is performed during
       glReadPixels().	target must be GL_CLAMP_READ_COLOR. If clamp is
       GL_TRUE, read color clamping is enabled; if clamp is GL_FALSE, read
       color clamping is disabled. If clamp is GL_FIXED_ONLY, read color
       clamping is enabled only if the selected read buffer has fixed point
       components and disabled otherwise.

ERRORS
       GL_INVALID_ENUM is generated if target is not GL_CLAMP_READ_COLOR.

       GL_INVALID_ENUM is generated if clamp is not GL_TRUE or GL_FALSE.

ASSOCIATED GETS
       glGet() with argument GL_CLAMP_READ_COLOR.

COPYRIGHT
       Copyright © 2010 Khronos Group. This material may be distributed
       subject to the terms and conditions set forth in the Open Publication
       License, v 1.0, 8 June 1999.  http://opencontent.org/openpub/.

OpenGL 3.3			  03/08/2011		      GLCLAMPCOLOR(3G)
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