Extends pict’s bounding box by adding the given amounts to the corresponding sides; ascent and descent are extended, too.
Truncates pict’s bounding box by removing the descent part.
Lifts pict relative to its baseline, extending the bounding box height if necessary.
Drops pict relative to its ascent line, extending the bounding box height if necessary.
Makes the descent 0 and the ascent the same as the height.
Assuming that sub-pict can be found within pict, shifts the overall bounding box to that of sub-pict (but preserving all the drawing of pict). The last element, as reported by pict-last is also set to (or (pict-last sub-pict) sub-pict).
Shifts the given pict’s bounding box to enclose the bounding boxes of all sub-picts (even laundered picts).
Returns a pict like pict, but with the last element (as reported by pict-last) set to sub-pict. The sub-pict must exist as a sub-pict (or path of sub-picts) within pict.
Propagates the last element of sub-pict to pict.
That is, use-last* is like use-last, but the last
element of sub-pict is used as the new last element for
pict, instead of sub-pict itself—