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use the modern libart way to uncross/rewind a libart SVP. This time really 

2004-01-26  Simon Budig  <simon@gimp.org>

	* app/core/gimpscanconvert.c: use the modern libart way
	to uncross/rewind a libart SVP. This time really fixes
	bug #132036 (please test it though...).
This commit is contained in:
Simon Budig 2004-01-26 21:19:17 +00:00 committed by Simon Budig
parent 86f967393d
commit fcc88b292e
2 changed files with 21 additions and 31 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2004-01-26 Simon Budig <simon@gimp.org>
* app/core/gimpscanconvert.c: use the modern libart way
to uncross/rewind a libart SVP. This time really fixes
bug #132036 (please test it though...).
2004-01-26 Sven Neumann <sven@gimp.org>
* app/display/gimpdisplayshell-selection.c: don't draw the

46
app/core/gimpscanconvert.c
View File

@ -23,6 +23,7 @@
#include <glib-object.h>
#include <libart_lgpl/libart.h>
#include <libart_lgpl/art_svp_intersect.h>
#include "libgimpmath/gimpmath.h"
@ -151,6 +152,8 @@ gimp_scan_convert_add_points (GimpScanConvert *sc,
sc->need_closing = TRUE;
sc->vpath[sc->num_nodes].code = ART_END;
sc->vpath[sc->num_nodes].x = 0.0;
sc->vpath[sc->num_nodes].y = 0.0;
}
@ -166,6 +169,8 @@ gimp_scan_convert_close_add_points (GimpScanConvert *sc)
sc->vpath[sc->num_nodes].y = sc->first.y;
sc->num_nodes++;
sc->vpath[sc->num_nodes].code = ART_END;
sc->vpath[sc->num_nodes].x = 0.0;
sc->vpath[sc->num_nodes].y = 0.0;
}
sc->need_closing = FALSE;
@ -229,6 +234,8 @@ gimp_scan_convert_add_polyline (GimpScanConvert *sc,
sc->num_nodes++;
}
sc->vpath[sc->num_nodes].code = ART_END;
sc->vpath[sc->num_nodes].x = 0.0;
sc->vpath[sc->num_nodes].y = 0.0;
/* If someone wants to mix this function with _add_points ()
* try to do something reasonable...
@ -475,7 +482,8 @@ gimp_scan_convert_render (GimpScanConvert *sc,
static void
gimp_scan_convert_finish (GimpScanConvert *sc)
{
ArtSVP *svp, *svp2;
ArtSVP *svp, *svp2;
ArtSvpWriter *swr;
/* return gracefully on empty path */
if (!sc->vpath)
@ -498,7 +506,7 @@ gimp_scan_convert_finish (GimpScanConvert *sc)
* }
* }
*/
if (sc->have_open)
{
gint i;
@ -511,38 +519,14 @@ gimp_scan_convert_finish (GimpScanConvert *sc)
}
}
#undef USE_PERTURB
svp = art_svp_from_vpath (sc->vpath);
#ifdef USE_PERTURB
/*
* Current Libart (2.3.8) recommends a slight random distorsion
* of the path, because art_svp_uncross and art_svp_rewind_uncrossed
* are not yet numerically stable. It is actually possible to construct
* worst case scenarios. The slight perturbation should not have any
* visible effect.
*/
swr = art_svp_writer_rewind_new (ART_WIND_RULE_ODDEVEN);
art_svp_intersector (svp, swr);
{
ArtVPath *vpath;
svp2 = art_svp_writer_rewind_reap (swr); /* this also frees swr */
pert_vpath = art_vpath_perturb (sc->vpath);
svp = art_svp_from_vpath (pert_vpath);
art_free (pert_vpath);
}
#else
/*
* using perturb apparently does more harm than good for libart
* 2.3.16. I don't really understand this. (Simon)
*/
svp = art_svp_from_vpath (sc->vpath);
#endif
svp2 = art_svp_uncross (svp);
art_svp_free (svp);
svp = art_svp_rewind_uncrossed (svp2, ART_WIND_RULE_ODDEVEN);
art_svp_free (svp2);
sc->svp = svp;
sc->svp = svp2;
}