gldrawbuffer man page on Solaris

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GLDRAWBUFFER(3gl)					     GLDRAWBUFFER(3gl)

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,
	     GL_FRONT_AND_BACK,	 and  GL_AUXi,	where  i  is  between  0   and
	     ``GL_AUX_BUFFERS''	 -1,  are  accepted (GL_AUX_BUFFERS is not the
	     upper limit; use glGet to query the number of available aux  buf‐
	     fers.)   The  initial  value is GL_FRONT for single-buffered con‐
	     texts, 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 buf‐
				fers  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 buf‐
				fers 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  buf‐
				fers  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 buf‐
				fers are written.  If there is no  back	 right
				color  buffer, only the front right color buf‐
				fer 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 buf‐
				fers 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.

       GL_AUXi			Only auxiliary color buffer i 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  con‐
       texts  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.

NOTES
       It is always the case that GL_AUXi = GL_AUX0 + i.

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.

       GL_INVALID_OPERATION  is	 generated if glDrawBuffer is executed between
       the execution of glBegin and the corresponding execution of glEnd.

ASSOCIATED GETS
       glGet with argument GL_DRAW_BUFFER
       glGet with argument GL_AUX_BUFFERS

SEE ALSO
       glBlendFunc, glColorMask, glIndexMask, glLogicOp, glReadBuffer

				   15 Mar 97		     GLDRAWBUFFER(3gl)
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