diff options
Diffstat (limited to 'ext/gd/libgd/gd_interpolation.c')
| -rw-r--r-- | ext/gd/libgd/gd_interpolation.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/ext/gd/libgd/gd_interpolation.c b/ext/gd/libgd/gd_interpolation.c index 0ff10b9f4f..ca106add7c 100644 --- a/ext/gd/libgd/gd_interpolation.c +++ b/ext/gd/libgd/gd_interpolation.c @@ -1247,7 +1247,13 @@ static gdImagePtr gdImageScaleBilinearPalette(gdImagePtr im, const unsigned int if (new_img == NULL) { return NULL; } - new_img->transparent = gdTrueColorAlpha(im->red[transparent], im->green[transparent], im->blue[transparent], im->alpha[transparent]); + + if (transparent < 0) { + /* uninitialized */ + new_img->transparent = -1; + } else { + new_img->transparent = gdTrueColorAlpha(im->red[transparent], im->green[transparent], im->blue[transparent], im->alpha[transparent]); + } for (i=0; i < _height; i++) { long j; |