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GLDRAWBUFFER(3G)			  OpenGL Manual 			 GLDRAWBUFFER(3G)

NAME
       glDrawBuffer - specify which color buffers are to be drawn into

C SPECIFICATION
       void glDrawBuffer(GLenum mode);

PARAMETERS
       mode
	   Specifies up to four color buffers to be drawn into. Symbolic constants GL_NONE,
	   GL_FRONT_LEFT, GL_FRONT_RIGHT, GL_BACK_LEFT, GL_BACK_RIGHT, GL_FRONT, GL_BACK,
	   GL_LEFT, GL_RIGHT, and GL_FRONT_AND_BACK are accepted. The initial value is GL_FRONT
	   for single-buffered contexts, and GL_BACK for double-buffered contexts.

DESCRIPTION
       When colors are written to the frame buffer, they are written into the color buffers
       specified by glDrawBuffer. The specifications are as follows:

       GL_NONE
	   No color buffers are written.

       GL_FRONT_LEFT
	   Only the front left color buffer is written.

       GL_FRONT_RIGHT
	   Only the front right color buffer is written.

       GL_BACK_LEFT
	   Only the back left color buffer is written.

       GL_BACK_RIGHT
	   Only the back right color buffer is written.

       GL_FRONT
	   Only the front left and front right color buffers are written. If there is no front
	   right color buffer, only the front left color buffer is written.

       GL_BACK
	   Only the back left and back right color buffers are written. If there is no back right
	   color buffer, only the back left color buffer is written.

       GL_LEFT
	   Only the front left and back left color buffers are written. If there is no back left
	   color buffer, only the front left color buffer is written.

       GL_RIGHT
	   Only the front right and back right color buffers are written. If there is no back
	   right color buffer, only the front right color buffer is written.

       GL_FRONT_AND_BACK
	   All the front and back color buffers (front left, front right, back left, back right)
	   are written. If there are no back color buffers, only the front left and front right
	   color buffers are written. If there are no right color buffers, only the front left
	   and back left color buffers are written. If there are no right or back color buffers,
	   only the front left color buffer is written.

       If more than one color buffer is selected for drawing, then blending or logical operations
       are computed and applied independently for each color buffer and can produce different
       results in each buffer.

       Monoscopic contexts include only left buffers, and stereoscopic contexts include both left
       and right buffers. Likewise, single-buffered contexts include only front buffers, and
       double-buffered contexts include both front and back buffers. The context is selected at
       GL initialization.

ERRORS
       GL_INVALID_ENUM is generated if mode is not an accepted value.

       GL_INVALID_OPERATION is generated if none of the buffers indicated by mode exists.

ASSOCIATED GETS
       glGet() with argument GL_DRAW_BUFFER

SEE ALSO
       glBlendFunc(), glColorMask(), glDrawBuffers(), glLogicOp(), glReadBuffer()

COPYRIGHT
       Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI
       Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.

AUTHORS
       opengl.org

opengl.org				    06/10/2014				 GLDRAWBUFFER(3G)
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