mesa: add support for GL_EXT_polygon_offset_clamp

Nothing enables the extension yet, but the values are now available.
The spec calls for it to only be exposed for GL 3.3+, which is core-only
in mesa. Instead we allow any driver to enable it, including in a compat
context for any GL version.

Signed-off-by: Ilia Mirkin <[email protected]>
Reviewed-by: Glenn Kennard <[email protected]>

1 files changed, 4 insertions, 2 deletions

diff --git a/src/mesa/main/attrib.c b/src/mesa/main/attrib.c
index 4684615a880..07934b9bca0 100644
--- a/src/mesa/main/attrib.c
+++ b/src/mesa/main/attrib.c
@@ -1248,8 +1248,10 @@ _mesa_PopAttrib(void)
                _mesa_FrontFace(polygon->FrontFace);
                _mesa_PolygonMode(GL_FRONT, polygon->FrontMode);
                _mesa_PolygonMode(GL_BACK, polygon->BackMode);
-               _mesa_PolygonOffset(polygon->OffsetFactor,
-                                   polygon->OffsetUnits);
+               _mesa_polygon_offset_clamp(ctx,
+                                          polygon->OffsetFactor,
+                                          polygon->OffsetUnits,
+                                          polygon->OffsetClamp);
                _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, polygon->SmoothFlag);
                _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, polygon->StippleFlag);
                _mesa_set_enable(ctx, GL_CULL_FACE, polygon->CullFlag);