lib/boundingbox.h

   1 /* Dia -- an diagram creation/manipulation program
   2  * Support for computing bounding boxes
   3  * Copyright (C) 2001 Cyrille Chepelov
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #ifndef BOUNDINGBOX_H
  21 #define BOUNDINGBOX_H
  22
  23 #include "geometry.h"
  24
  25 typedef struct _PolyBBExtras PolyBBExtras;
  26
  27 struct _PolyBBExtras {
  28   real start_long, start_trans;
  29   real middle_trans;
  30   real end_long, end_trans;
  31 };
  32
  33 typedef struct _LineBBExtras LineBBExtras;
  34
  35 struct _LineBBExtras {
  36   real start_long, start_trans;
  37   real end_long, end_trans;
  38 };
  39
  40 typedef struct _ElementBBExtras ElementBBExtras;
  41 struct _ElementBBExtras {
  42   real border_trans;
  43 };
  44
  45 void bicubicbezier2D_bbox(const Point *p0,const Point *p1,
  46                           const Point *p2,const Point *p3,
  47                           const PolyBBExtras *extra,
  48                           Rectangle *rect);
  49
  50 void line_bbox(const Point *p1, const Point *p2,
  51                const LineBBExtras *extra,
  52                Rectangle *rect);
  53
  54 void rectangle_bbox(const Rectangle *rin,
  55                     const ElementBBExtras *extra,
  56                     Rectangle *rout);
  57
  58 void circle_bbox(const Point *centre, real radius,
  59                  Rectangle *rect);
  60
  61 void ellipse_bbox(const Point *centre, real width, real height,
  62                   const ElementBBExtras *extra,
  63                   Rectangle *rect);
  64 void polyline_bbox(const Point *pts, int numpoints,
  65                    const PolyBBExtras *extra, gboolean closed,
  66                    Rectangle *rect);
  67 void polybezier_bbox(const BezPoint *pts, int numpoints,
  68                      const PolyBBExtras *extra, gboolean closed,
  69                      Rectangle *rect);
  70
  71 #endif /* BOUNDINGBOX_H */