table of contents
GLDRAWBUFFER(3G) | [FIXME: manual] | GLDRAWBUFFER(3G) |
NAME¶
glDrawBuffer - specify which color buffers are to be drawn intoC SPECIFICATION¶
void
glDrawBuffer(GLenum mode);
PARAMETERS¶
modeSpecifies 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_NONENo 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¶
ASSOCIATED GETS¶
SEE ALSO¶
COPYRIGHT¶
Copyright © 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/.05/30/2012 | [FIXME: source] |