StdArc

The default Quickdraw arc/wedge-drawing routine

#include <Quickdraw.h> Quickdraw

void StdArc(gVerb, theRect, startAngle, arcAngle );

GrafVerb gVerb ; frame, paint, erase, invert, or fill

Rect *theRect ; rectangle enclosing oval in local coordinates

short startAngle ; position on oval to start drawing

short arcAngle ; amount of oval to draw; direction to move

This is Quickdraw's default low-level routine for drawing arcs and wedges.

The object is framed (an arc) or, painted, erased, inverted, or filled (a

wedge), depending upon the grafVerb.

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, of

which the arc is a subset.

startAngle specifies the starting position and . . .

arcAngle specifies the distance along the arc to be framed or filled See

FrameArc for a description of Quickdraw "rectangular degrees

and related information and illustrations.

Notes: Use StdArc 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 you're recording a picture (see OpenPicture), StdArc incorporates

the arc or wedge into its definition.

Referenced by (3):