diff options
Diffstat (limited to 'converter/other/giftopnm.c')
| -rw-r--r-- | converter/other/giftopnm.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/converter/other/giftopnm.c b/converter/other/giftopnm.c index 96a6fc4c..239e5100 100644 --- a/converter/other/giftopnm.c +++ b/converter/other/giftopnm.c @@ -1754,6 +1754,8 @@ readGifHeader(FILE * const gifFileP, gifScreenP->hasGray ? "contains" : "doesn't contain", gifScreenP->hasColor ? "contains" : "doesn't contain"); } + } else { + gifScreenP->ColorMap.size = 0; } if (gifScreenP->AspectRatio != 0 && gifScreenP->AspectRatio != 49) @@ -1948,6 +1950,11 @@ convertImage(FILE * const ifP, validateWithinGlobalScreen(imageHeader, gifScreen); if (imageHeader.useGlobalColormap) { + if (gifScreen.ColorMap.size == 0) { + pm_error("Invalid GIF: " + "Image has no local color map and stream has no global " + "color map either."); + } currentColorMapP = &gifScreen.ColorMap; hasGray = gifScreen.hasGray; hasColor = gifScreen.hasColor; |