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 up‐
             per  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 fol‐
       lows:

       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 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  buf‐
                                fers  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  buf‐
                                fers  are written.  If there are no right color
                                buffers, only the  front  left  and  back  left

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

                                                               GLDRAWBUFFER(3G)