IABSD.fr/xenocara/app/xeyes/transform.c

Branch : - branch - master - tag -

• Show log

  Commit

• Author : matthieu
  Date : 2006-11-25 20:07:29
  Hash : 616b6f15
  Message : Importing from X.Org 7.2RC2

• app/xeyes/transform.c

• /*
   * transformed coordinate system objects for X
   */
  /* $XFree86: xc/programs/xeyes/transform.c,v 1.3 2000/02/17 14:00:35 dawes Exp $ */
  
  # include	<X11/Xos.h>
  # include	<stdlib.h>
  # include	<X11/Xlib.h>
  # include	"transform.h"
  
  #if 0
  static XPoint *
  TranslatePoints (TPoint *points, int n_points, Transform *t, int mode)
  {
  	XPoint	*xpoints;
  	int	i;
  	double	xoff = 0.0, yoff = 0.0;
  
  	xpoints = (XPoint *) malloc (n_points * sizeof (*xpoints));
  	if (!xpoints)
  		return NULL;
  	for (i = 0; i < n_points; i++) {
  		xpoints[i].x = Xx(points[i].x + xoff, points[i].y + yoff, t);
  		xpoints[i].y = Xy(points[i].x + xoff, points[i].y + yoff, t);
  		if (mode == CoordModePrevious) {
  			xoff += points[i].x;
  			yoff += points[i].y;
  		}
  	}
  	return xpoints;
  }
  
  static void
  TFillPolygon (
      Display	*dpy,
      Drawable	d,
      GC		gc,
      Transform	*t,
      TPoint	*points,
      int		n_points,
      int		shape,
      int		mode)
  {
  	XPoint	*xpoints;
  
  	xpoints = TranslatePoints (points, n_points, t, mode);
  	if (xpoints) {
  		XFillPolygon (dpy, d, gc, xpoints, n_points, shape,
  				CoordModeOrigin);
  		free (xpoints);
  	}
  }
  
  static void
  TDrawArc (
      Display	*dpy,
      Drawable	d,
      GC		gc,
      Transform	*t,
      double	x,
      double	y,
      double	width,
      double	height,
      int		angle1,
      int		angle2)
  {
  	int	xx, xy, xw, xh;
  
  	xx = Xx(x,y,t);
  	xy = Xy(x,y,t);
  	xw = Xwidth (width, height, t);
  	xh = Xheight (width, height, t);
  	if (xw < 0) {
  		xx += xw;
  		xw = -xw;
  	}
  	if (xh < 0) {
  		xy += xh;
  		xh = -xh;
  	}
  	XDrawArc (dpy, d, gc, xx, xy, xw, xh, angle1, angle2);
  }
  #endif
  
  void
  TFillArc (dpy, d, gc, t, x, y, width, height, angle1, angle2)
      Display	*dpy;
      Drawable	d;
      GC		gc;
      Transform	*t;
      double	x, y, width, height;
      int		angle1, angle2;
  {
  	int	xx, xy, xw, xh;
  
  	xx = Xx(x,y,t);
  	xy = Xy(x,y,t);
  	xw = Xwidth (width, height, t);
  	xh = Xheight (width, height, t);
  	if (xw < 0) {
  		xx += xw;
  		xw = -xw;
  	}
  	if (xh < 0) {
  		xy += xh;
  		xh = -xh;
  	}
  	XFillArc (dpy, d, gc, xx, xy, xw, xh, angle1, angle2);
  }
  
  void
  SetTransform (t, xx1, xx2, xy1, xy2, tx1, tx2, ty1, ty2)
      Transform	*t;
      int		xx1, xx2, xy1, xy2;
      double	tx1, tx2, ty1, ty2;
  {
  	t->mx = ((double) xx2 - xx1) / (tx2 - tx1);
  	t->bx = ((double) xx1) - t->mx * tx1;
  	t->my = ((double) xy2 - xy1) / (ty2 - ty1);
  	t->by = ((double) xy1) - t->my * ty1;
  }