зеркало из https://github.com/mozilla/gecko-dev.git
83 строки
2.2 KiB
C
83 строки
2.2 KiB
C
/* 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);
|
|
}
|