glClampColor.3G man page

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

C Specification

void glClampColor(GLenum target, GLenum clamp);



Target for color clamping. target must be GL_CLAMP_READ_COLOR.


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


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.


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.

Version Support

OpenGL Version
Function / Feature Name 2.0 2.1 3.0 3.1 3.2 3.3 4.0 4.1 4.2 4.3 4.4 4.5
glClampColor - -

See Also


07/13/2018 [FIXME: source] [FIXME: manual]