Fixed opening extensions (closes #34)

Author: mr-cheffy

src/gfx/wr/webrender/src/picture-rs.patch

@@ -0,0 +1,18 @@
+diff --git a/gfx/wr/webrender/src/picture.rs b/gfx/wr/webrender/src/picture.rs
+index f22bcadd0624d9a22f5c3fa318d7795e102b890f..68d1eb55abde2a9b5779b1d07c5f111f46f177a8 100644
+--- a/gfx/wr/webrender/src/picture.rs
++++ b/gfx/wr/webrender/src/picture.rs
+@@ -7449,7 +7449,12 @@ fn get_relative_scale_offset(
+         CoordinateSpaceMapping::Local => ScaleOffset::identity(),
+         CoordinateSpaceMapping::ScaleOffset(scale_offset) => scale_offset,
+         CoordinateSpaceMapping::Transform(m) => {
+-            ScaleOffset::from_transform(&m).expect("bug: pictures caches don't support complex transforms")
++            // Temporary fix when opening extensions (#34)
++            // TODO: Look more into this
++            ScaleOffset {
++                scale: Vector2D::new(m.m11, m.m22),
++                offset: Vector2D::new(m.m41, m.m42),
++            }
+         }
+     };
+