fixed a nasty floating point bug

[swftools.git] / lib / gfxpoly / poly.c

diff --git a/lib/gfxpoly/poly.c b/lib/gfxpoly/poly.c
index efb51fe..2be5efb 100644 (file)
--- a/lib/gfxpoly/poly.c
+++ b/lib/gfxpoly/poly.c
@@ -167,6 +167,7 @@ int gfxpoly_size(gfxpoly_t*poly)
 
 char gfxpoly_check(gfxpoly_t*poly)
 {
+    current_polygon = poly;
     dict_t*d = dict_new2(&point_type);
     int s,t;
     gfxpolystroke_t*stroke = poly->strokes;
@@ -304,6 +305,11 @@ static void segment_init(segment_t*s, int32_t x1, int32_t y1, int32_t x2, int32_
     s->nr = segment_count++;
 
 #ifdef CHECKS
+    /* notice: on some systems (with some compilers), for the line 
+       (1073741823,-1073741824)->(1073741823,1073741823)
+       we get LINE_EQ(s->a, s) == 1. 
+       That's why we now clamp to 26 bit.
+    */
     assert(LINE_EQ(s->a, s) == 0);
     assert(LINE_EQ(s->b, s) == 0);