The Clipper Invocations metric represents the number of primitives processed by the Clipper.
- If you render 100 triangles and clipping is enabled, the Clipper Invocations is 100.
- If you render 100 triangles and clipping is disabled, the Clipper Invocations is 0.
In most cases you do not have to care about the clipper performance on Intel® HD Graphics 2000/3000 GPUs because these graphic processors utilize a fast clipping algorithm implemented in silicon.
For more information on enabling/disabling hardware clipping read the Microsoft* DirectX* SDK documentation.