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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