Gl.ReadBuffer (gb.opengl)
Static Sub ReadBuffer ( Mode As Integer )
Select a color buffer source for pixels.
Parameters
- mode
-
Specifies a color buffer.
Accepted values are
Gl.FRONT_LEFT,
Gl.FRONT_RIGHT,
Gl.BACK_LEFT,
Gl.BACK_RIGHT,
Gl.FRONT,
Gl.BACK,
Gl.LEFT, and
Gl.RIGHT.
Description
Gl.ReadBuffer specifies a color buffer as the source for subsequent
Gl.ReadPixels,
Gl.CopyTexImage1D,
Gl.CopyTexImage2D,
Gl.CopyTexSubImage1D, Gl.CopyTexSubImage2D, and
Gl.CopyTexSubImage3D commands.
mode accepts one of twelve or more predefined values.
In a fully configured system,
Gl.FRONT,
Gl.LEFT, and
Gl.FRONT_LEFT all name the front left buffer,
Gl.FRONT_RIGHT and
Gl.RIGHT name the front right buffer, and
Gl.BACK_LEFT and
Gl.BACK name the back left buffer.
Nonstereo double-buffered configurations have only a front left and a
back left buffer.
Single-buffered configurations have a front left and a front right
buffer if stereo, and only a front left buffer if nonstereo.
It is an error to specify a nonexistent buffer to
Gl.ReadBuffer.
mode is initially Gl.FRONT in single-buffered configurations
and Gl.BACK in double-buffered configurations.
Errors
Gl.INVALID_ENUM is generated if
mode is not one of the twelve
(or more) accepted values.
Gl.INVALID_OPERATION is generated if
mode specifies a buffer
that does not exist.
Associated Gets
Gl.Get with argument Gl.READ_BUFFER
See also
Gl.CopyTexSubImage1D,
Gl.CopyTexSubImage2D,
Gl.CopyTexSubImage3D,
Gl.ReadPixels