glReadBuffer — select a color buffer source for pixels
void glReadBuffer(
|
GLenum src) ; |
src
Specifies a color buffer.
Accepted values are
GL_BACK
,
GL_NONE
, and
GL_COLOR_ATTACHMENTi
.
glReadBuffer
specifies a color buffer as the source for subsequent
glReadPixels, , glCopyTexImage2D,
glCopyTexSubImage2D, and
glCopyTexSubImage3D commands.
src
accepts one of the following values:
GL_NONE
,
GL_BACK
names the back buffer of the default framebuffer, and
GL_COLOR_ATTACHMENTi
names a color attachment of the current framebuffer,
GL_INVALID_ENUM
is generated if src
is not GL_BACK
,
GL_NONE
, or GL_COLOR_ATTACHMENTi
, where i is less than
GL_MAX_COLOR_ATTACHMENTS
.
GL_INVALID_OPERATION
is generated if the current framebuffer is the default framebufer and
src
is not GL_NONE
or GL_BACK
.
GL_INVALID_OPERATION
is generated if the current framebuffer is a named framebufer and
src
is not GL_NONE
or GL_COLOR_ATTACHMENTi
.
glGet with argument GL_READ_BUFFER
OpenGL ES API Version | ||||
---|---|---|---|---|
Function Name | 2.0 | 3.0 | 3.1 | 3.2 |
glReadBuffer | - | ✔ | ✔ | ✔ |
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