st/mesa: correct point_tri_clip for gles2
The OpenGL ES 2.0 (and later) specifications, section 2.13 (Primitive Clipping) say the following about point-clipping: > If the primitive under consideration is a point, then clipping > discards it if it lies outside the near or far clip plane; otherwise > it is passed unchanged. This matches the D3D convention, and we already have a rasterizer-state bit for it. So let's set that bit when the API is OpenGL ES 2. We can set this inside the PointSprite-conditional block, because that's always enabled on GLES 2, and it's undefined to enable this state without also enabling point_quad_rasterization. Reviewed-by:Roland Scheidegger <sroland@vmware.com> Part-of: <mesa/mesa!12350>