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 /** \file boundingbox.h Boundingbox calculation (helpers) */
  21
  22 #ifndef BOUNDINGBOX_H
  23 #define BOUNDINGBOX_H
  24
  25 #include "diatypes.h"
  26 #include "geometry.h"
  27
  28 struct _PolyBBExtras {
  29   real start_long, start_trans;
  30   real middle_trans;
  31   real end_long, end_trans;
  32 };
  33
  34 struct _LineBBExtras {
  35   real start_long, start_trans;
  36   real end_long, end_trans;
  37 };
  38
  39 struct _ElementBBExtras {
  40   real border_trans;
  41 };
  42
  43 void bicubicbezier2D_bbox(const Point *p0,const Point *p1,
  44                           const Point *p2,const Point *p3,
  45                           const PolyBBExtras *extra,
  46                           Rectangle *rect);
  47
  48 void line_bbox(const Point *p1, const Point *p2,
  49                const LineBBExtras *extra,
  50                Rectangle *rect);
  51
  52 void rectangle_bbox(const Rectangle *rin,
  53                     const ElementBBExtras *extra,
  54                     Rectangle *rout);
  55
  56 void circle_bbox(const Point *centre, real radius,
  57                  Rectangle *rect);
  58
  59 void ellipse_bbox(const Point *centre, real width, real height,
  60                   const ElementBBExtras *extra,
  61                   Rectangle *rect);
  62 void polyline_bbox(const Point *pts, int numpoints,
  63                    const PolyBBExtras *extra, gboolean closed,
  64                    Rectangle *rect);
  65 void polybezier_bbox(const BezPoint *pts, int numpoints,
  66                      const PolyBBExtras *extra, gboolean closed,
  67                      Rectangle *rect);
  68
  69 #endif /* BOUNDINGBOX_H */