fillSubpaths method
Fills already-flattened device-space subpaths (each implicitly closed - PDF fill semantics).
Implementation
void fillSubpaths(List<FlatSubpath> subpaths, PdfFillRule rule, int rgba) {
if (subpaths.isEmpty || _rowCount == 0) return;
for (final sub in subpaths) {
_addRing(sub.points, 0, sub.points.length);
}
_finishShape(rule, rgba);
}