FillRgn
FillRgn
Fill region with specified pattern PatPtr thePat ; address of an 8-byte Pattern structure FillRgn fills all pixels enclosed by a region with a specified pattern. The transfer mode is patCopy, overwriting all bits within the region.
theRgn is the handle of a region.
thePat is the address of an 8-byte Pattern structure. It may be one of the global patterns (black, white, gray, ltGray, or dkGray); or a pattern read from a resource; or a pattern created by the application. See
PenPat for examples of obtaining or creating a pattern.
Notes: The pattern overwrites the interior of the region, including the output of
any previously- executed "frame" operation. As with all pattern operations,
the top-left of the pattern is aligned at a multiple of 8 dots from local
coordinate (0,0).
The pen position is not changed by this function. The GrafPort's pen pattern, pen mode, and background pattern are ignored.
As with all Quickdraw drawing, the output is clipped to the intersection of
the current GrafPort's bitMap boundary rectangle, the port rectangle, clipping region, and visible region.