HP b2600 Reference Manual page 118

D
glDrawBuffer
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. 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 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.
Notes
It is always the case that GL_AUXi = GL_AUX0 + i.
Errors
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•
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Associated Gets
glGet with argument GL_DRAW_BUFFER
glGet with argument GL_AUX_BUFFERS
See Also
glBlendFunc,
glColorMask,
glIndexMask,
glLogicOp,
glReadBuffer
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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.
Chapter 4