2d/clip.h File Reference

Defines
#define	IABS(x)   (((x) < 0) ? -(x) : (x))
#define	EXCHG(a, b)
#define	SORT2(a, b)
#define	SCALE(var, arg, num, den)   ((var) = ((arg) * (num)) / (den))
#define	USCALE(var, arg, num, den)   ((var) = ((unsigned)(arg) * (unsigned)(num)) / (unsigned)(den))
#define	FSCALE(var, arg, num, den)   ((var) = fixmuldiv((arg),(num),(den)))
#define	CLIPDOT(xx, yy, WHEN_OUTSIDE, WHEN_CLIPPED)
#define	CLIPHLINE(x1, x2, yy, WHEN_OUTSIDE, WHEN_CLIPPED)
#define	CLIPVLINE(xx, y1, y2, WHEN_OUTSIDE, WHEN_CLIPPED)
#define	CLIPBOX(x1, y1, x2, y2, WHEN_OUTSIDE, WHEN_CLIPPED)
#define	CLIPLINE(x1, y1, x2, y2, XMIN, YMIN, XMAX, YMAX, WHEN_OUTSIDE, WHEN_CLIPPED, MY_SCALE)

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Define Documentation

#define CLIPBOX (  x1, y1, x2, y2, WHEN_OUTSIDE, WHEN_CLIPPED   )

Value: { \ if(x1 > x2) EXCHG(x1,x2); \ if(y1 > y2) EXCHG(y1,y2); \ if((x1 > XMAX) || (x2 < 0)) { WHEN_OUTSIDE; } \ if((y1 > YMAX) || (y2 < 0)) { WHEN_OUTSIDE; } \ if(x1 < 0) { x1 = 0; WHEN_CLIPPED; } \ if(y1 < 0) { y1 = 0; WHEN_CLIPPED; } \ if(x2 > XMAX) { x2 = XMAX; WHEN_CLIPPED; } \ if(y2 > YMAX) { y2 = YMAX; WHEN_CLIPPED; } \ }

#define CLIPDOT (  xx, yy, WHEN_OUTSIDE, WHEN_CLIPPED   )

Value: { \ if((xx > XMAX) || (xx < XMIN)) { WHEN_OUTSIDE; } \ if((yy > YMAX) || (yy < YMIN)) { WHEN_OUTSIDE; } \ }

#define CLIPHLINE (  x1, x2, yy, WHEN_OUTSIDE, WHEN_CLIPPED   )

Value: { \ if(x1 > x2) EXCHG(x1,x2); \ if((x1 > XMAX) || (x2 < XMIN)) { WHEN_OUTSIDE; } \ if((yy > YMAX) || (yy < YMIN)) { WHEN_OUTSIDE; } \ if(x1 < XMIN) { x1 = XMIN; WHEN_CLIPPED; } \ if(x2 > XMAX) { x2 = XMAX; WHEN_CLIPPED; } \ }

#define CLIPLINE (  x1, y1, x2, y2, XMIN, YMIN, XMAX, YMAX, WHEN_OUTSIDE, WHEN_CLIPPED, MY_SCALE   )

#define CLIPVLINE (  xx, y1, y2, WHEN_OUTSIDE, WHEN_CLIPPED   )

Value: { \ if(y1 > y2) EXCHG(y1,y2); \ if((xx > XMAX) || (xx < XMIN)) { WHEN_OUTSIDE; } \ if((y1 > YMAX) || (y2 < YMIN)) { WHEN_OUTSIDE; } \ if(y1 < YMIN) { y1 = YMIN; WHEN_CLIPPED; } \ if(y2 > YMAX) { y2 = YMAX; WHEN_CLIPPED; } \ }

#define EXCHG (  a, b   )

Value: do { \ int __temp__ = (a); \ (a) = (b); \ (b) = __temp__; \ } while(0)

#define FSCALE (  var, arg, num, den   )     ((var) = fixmuldiv((arg),(num),(den)))

#define IABS (  x   )     (((x) < 0) ? -(x) : (x))

#define SCALE (  var, arg, num, den   )     ((var) = ((arg) * (num)) / (den))

#define SORT2 (  a, b   )

Value: do { \ if((a) > (b)) EXCHG(a,b); \ } while(0)

#define USCALE (  var, arg, num, den   )     ((var) = ((unsigned)(arg) * (unsigned)(num)) / (unsigned)(den))

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