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

Branch : - branch - master - tag -

• Show log

  Commit

• Author : matthieu
  Date : 2024-12-23 09:01:12
  Hash : 0840a0e7
  Message : update to oclock 1.0.6

• app/oclock/transform.c

• /*
  
  Copyright 1993, 1998  The Open Group
  
  Permission to use, copy, modify, distribute, and sell this software and its
  documentation for any purpose is hereby granted without fee, provided that
  the above copyright notice appear in all copies and that both that
  copyright notice and this permission notice appear in supporting
  documentation.
  
  The above copyright notice and this permission notice shall be included
  in all copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
  OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  OTHER DEALINGS IN THE SOFTWARE.
  
  Except as contained in this notice, the name of The Open Group shall
  not be used in advertising or otherwise to promote the sale, use or
  other dealings in this Software without prior written authorization
  from The Open Group.
  
  */
  
  
  /*
   * transformed coordinate system objects for X
   */
  
  #include	<X11/Xlib.h>
  #include	"transform.h"
  #include	<stdlib.h>
  
  static XPoint *
  TranslatePoints(TPoint *points, int n_points,
  		Transform *t, int mode)
  {
  	XPoint	*xpoints;
  	double	xoff = 0.0, yoff = 0.0;
  
  	xpoints = (XPoint *) malloc ((unsigned)n_points * sizeof (*xpoints));
  	if (!xpoints)
  		return NULL;
  	for (int 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;
  }
  
  void
  TFillPolygon (register 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);
  	}
  }
  
  void
  TFillArc (register 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;
  	}
  	XFillArc (dpy, d, gc, xx, xy, xw, xh, angle1, angle2);
  }
  
  void
  SetTransform (Transform *t, int xx1, int xx2, int xy1, int xy2,
  	      double tx1, double tx2, double ty1, double 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;
  }