The glPushName and glPopName functions push and pop the name stack.
void glPushName(
GLuint name
);
void glPopName(
void
);
The glPushName function causes name to be pushed onto the name stack, which is initially empty. The glPopName function pops one name off the top of the stack. The name stack is used during selection mode to allow sets of rendering commands to be uniquely identified. It consists of an ordered set of unsigned integers.
The name stack is always empty while the render mode is not GL_SELECT. Calls to glPushName or glPopName while the render mode is not GL_SELECT are ignored.
The following functions retrieve information related to glPushName and glPopName:
glGet with argument GL_NAME_STACK_DEPTH
glGet with argument GL_MAX_NAME_STACK_DEPTH
It is an error to push a name onto a full stack, or to pop a name off an empty stack. It is also an error to manipulate the name stack between a call to glBegin and the corresponding call to glEnd. In any of these cases, the error flag is set and no other change is made to the OpenGL state.
The following are the error codes generated and their conditions.
| Error Code | Condition |
|---|---|
| GL_STACK_OVERFLOW | glPushName was called while the name stack was full. |
| GL_STACK_UNDERFLOW | glPopName was called while the name stack was empty. |
| GL_INVALID_OPERATION | glPushName or glPopName was called between a call to glBegin and the corresponding call to glEnd. |
Windows NT: Use version 3.5 and later.
Windows: Use Windows 95 and later.
Windows CE: Unsupported.
Header: Declared in gl.h.
Import Library: Link with opengl32.lib.
glBegin, glEnd, glInitNames, glLoadName, glRenderMode, glSelectBuffer