StdOval
StdOval The default Quickdraw oval-drawing routine
#include <Quickdraw.h> Quickdraw
void StdOval(gVerb, theRect );
GrafVerb gVerb ; frame, paint, erase, invert, or fill
Rect *theRect ; a rectangle enclosing an oval in local coordinates
This is Quickdraw's default low-level routine for drawing ovals and circles.
The oval is framed, painted, erased, inverted, or filled, depending upon the
grafVerb parameter.
gVerb is a GrafVerb enumerated-integer data type specifying the operation
to perform; it must be one of:
frame 0 draw the outline using current pen parameters
paint 1 fill with thePort->pnPat
erase 2 fill with thePort->bkPat
invert 3 toggle all bits enclosed by the object
fill 4 fill with thePort->fillPat
theRect is the address of an 8-byte Rect structure, expressed in local
coordinates, which defines the location, size, and shape of the oval.
See FrameOval for illustrations.
Returns: none

Notes: Use StdOval only if your application intercepts the Quickdraw bottleneck
routines (see SetStdProcs).
All grafVerbs are performed using values taken from the current GrafPort.
Output is clipped to portBits.bounds, portRect, visRgn, and clipRgn. This
function does not affect the pen position.
If a region is currently open and being formed (see OpenRgn), and
gVerb=frame, the oval's interior is added to the region's structure. If
you're recording a picture (see OpenPicture), StdOval incorporates the
oval into its definition.