diff options
| -rw-r--r-- | ext/gd/libgd/gd.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/ext/gd/libgd/gd.c b/ext/gd/libgd/gd.c index 66214dfe70..b8acd1d155 100644 --- a/ext/gd/libgd/gd.c +++ b/ext/gd/libgd/gd.c @@ -1019,6 +1019,7 @@ void gdImageAABlend (gdImagePtr im) /* Bresenham as presented in Foley & Van Dam */ void gdImageLine (gdImagePtr im, int x1, int y1, int x2, int y2, int color) { + int t; int dx, dy, incr1, incr2, d, x, y, xend, yend, xdirflag, ydirflag; int wid; int w, wstart; @@ -1031,6 +1032,12 @@ void gdImageLine (gdImagePtr im, int x1, int y1, int x2, int y2, int color) /* Vertical */ if (x1==x2) { + if (y2 < y1) { + t = y2; + y2 = y1; + y1 = t; + } + for (;y1 <= y2; y1++) { gdImageSetPixel(im, x1,y1, color); } @@ -1039,6 +1046,12 @@ void gdImageLine (gdImagePtr im, int x1, int y1, int x2, int y2, int color) /* Horizontal */ if (y1==y2) { + if (x2 < x1) { + t = x2; + x2 = x1; + x1 = t; + } + for (;x1 <= x2; x1++) { gdImageSetPixel(im, x1,y1, color); } |