/* 
 * UserPath.h by Bruce Blumberg, NeXT Computer, Inc.
 *
 * You may freely copy,distribute and re-use the code in this example. NeXT
 * disclaims any warranty of any kind, expressed or implied, as to its fitness
 * for any particular purpose
 *
 * This file and its associated .m file define a data structure and set of
 * functions aimed at facilitating the use of user paths. Here is a simple
 * example:
 *
 * UserPath *arect;
 * arect = newUserPath(); // creates an empty user path
 * beginUserPath(arect,YES);  // initialize user path and cache
 *   UPmoveto(arect,0.0,0.0); // add moveto to userpath; update bounding box
 *   UPrlineto(arect,0.0,100.0); // add rlineto to path; update bounding box
 *   UPrlineto(arect,100.0,0.0); // add rlineto to path; update bounding box
 *   UPrlineto(arect,0.0,-100.0); // add rlineto to path; update bounding box
 *   closePath(arect); // close path
 * endUserPath(arect,dps_stroke); // close user path and specify operator
 * sendUserPath(arect);
 *
 * As you will note, the set of routines manage the allocation and growth of
 * the operator and operand arrays, as well as the calculation of the bounding
 * box. A user path created via these functions may be optionally cached down
 * at the window server, or repeatedly sent down.  The user paths created by
 * this set of functions are all allocated in a unique zone.
 *
 * Note: the associated file is a .m file because it pulls in some .h files
 * which reference objective C methods. 
 */

#ifndef UserPath_h
#define UserPath_h

#include <objc/objc.h>
#include <AppKit/NSGraphicsContext.h>

typedef struct _UP {
	float      *points;
	int         numberOfPoints;
	char       *ops;
	NSPoint     cp;
	int         numberOfOps;
	int         max;
	float       bbox[4];
	int         opForUserPath;
	BOOL        ping;
} UserPath;

/* UserPath functions */
NSZone     *userPathZone ();
UserPath   *newUserPath ();
void        freeUserPath (UserPath * up);
void        debugUserPath (UserPath * up, BOOL shouldPing);
void        growUserPath (UserPath * up);
void        beginUserPath (UserPath * up, BOOL cache);
void        endUserPath (UserPath * up, int op);
int         sendUserPath (UserPath * up);
void        UPmoveto (UserPath * up, float x, float y);
void        UPrmoveto (UserPath * up, float x, float y);
void        UPlineto (UserPath * up, float x, float y);
void        UPrlineto (UserPath * up, float x, float y);
void        UPcurveto (UserPath * up, float x1, float y1, float x2, float y2,
					   float x3, float y3);
void        UPrcurveto (UserPath * up, float dx1, float dy1, float dx2,
						float dy2, float dx3, float dy3);
void        UParc (UserPath * up, float x, float y, float r, float ang1,
				   float ang2);
void        UParcn (UserPath * up, float x, float y, float r, float ang1,
					float ang2);
void        UParct (UserPath * up, float x1, float y1, float x2, float y2,
					float r);
void        closePath (UserPath * up);
void        addPts (UserPath * up, float x, float y);
void        addOp (UserPath * up, int op);
void        add (UserPath * up, int op, float x, float y);
void        checkBBox (UserPath * up, float x, float y);

#endif // UserPath_h