Struct GroupFrame 

pub struct GroupFrame {
    pub display_list: DisplayList,
    pub kind: GroupKind,
    pub saved_clip_path_version: u32,
    pub saved_gsave_depth: usize,
}

One frame on Context::group_stack. Captures paint operators emitted between a begin* and a matching close. The active capture target is always Self::display_list; what happens to it on close depends on Self::kind.

Fields

display_list: DisplayList

Paint operators emitted while this frame is on top of group_stack. The semantics on close depend on kind.

kind: GroupKind

What this frame represents — transparency group, soft-mask builder, or post-endsoftmask masked-content scope.

saved_clip_path_version: u32

gstate.clip_path_version snapshot taken when the frame opened. Reserved for future use (e.g. detecting clip changes that crossed the boundary).

saved_gsave_depth: usize

gstate_stack.len() at the moment the frame opened. Used by gsave / grestore and restore to refuse pops that would orphan this frame.