X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=lib%2Fart%2Fart_rect_svp.c;fp=lib%2Fart%2Fart_rect_svp.c;h=d9819963a9a4800a0bce9ba5d40de39973804cd6;hb=418ef05b5d0b74e6f19200ffa40bcc3afccb5029;hp=0000000000000000000000000000000000000000;hpb=c1f4a906117e98e2f4ba59abc1ce153e8129bc19;p=swftools.git diff --git a/lib/art/art_rect_svp.c b/lib/art/art_rect_svp.c new file mode 100644 index 0000000..d981996 --- /dev/null +++ b/lib/art/art_rect_svp.c @@ -0,0 +1,82 @@ +/* Libart_LGPL - library of basic graphic primitives + * Copyright (C) 1998 Raph Levien + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +#include "config.h" +#include "art_rect_svp.h" + +#include "art_misc.h" +#include "art_svp.h" +#include "art_rect.h" + +#ifndef MAX +#define MAX(a, b) (((a) > (b)) ? (a) : (b)) +#endif /* MAX */ + +#ifndef MIN +#define MIN(a, b) (((a) < (b)) ? (a) : (b)) +#endif /* MIN */ + +/** + * art_drect_svp: Find the bounding box of a sorted vector path. + * @bbox: Where to store the bounding box. + * @svp: The SVP. + * + * Finds the bounding box of the SVP. + **/ +void +art_drect_svp (ArtDRect *bbox, const ArtSVP *svp) +{ + int i; + + if (svp->n_segs == 0) + { + bbox->x0 = 0; + bbox->y0 = 0; + bbox->x1 = 0; + bbox->y1 = 0; + return; + } + + art_drect_copy (bbox, &svp->segs[0].bbox); + + for (i = 1; i < svp->n_segs; i++) + { + bbox->x0 = MIN (bbox->x0, svp->segs[i].bbox.x0); + bbox->y0 = MIN (bbox->y0, svp->segs[i].bbox.y0); + bbox->x1 = MAX (bbox->x1, svp->segs[i].bbox.x1); + bbox->y1 = MAX (bbox->y1, svp->segs[i].bbox.y1); + } +} + +/** + * art_drect_svp_union: Compute the bounding box of the svp and union it in to the existing bounding box. + * @bbox: Initial boundin box and where to store the bounding box. + * @svp: The SVP. + * + * Finds the bounding box of the SVP, computing its union with an + * existing bbox. + **/ +void +art_drect_svp_union (ArtDRect *bbox, const ArtSVP *svp) +{ + ArtDRect svp_bbox; + + art_drect_svp (&svp_bbox, svp); + art_drect_union (bbox, bbox, &svp_bbox); +}