diff options
| -rw-r--r-- | src/plugins/imageformats/gif/qgifhandler.cpp | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/src/plugins/imageformats/gif/qgifhandler.cpp b/src/plugins/imageformats/gif/qgifhandler.cpp index e7bd16a5fb..c0d4c71f7a 100644 --- a/src/plugins/imageformats/gif/qgifhandler.cpp +++ b/src/plugins/imageformats/gif/qgifhandler.cpp @@ -490,12 +490,14 @@ int QGIFFormat::decode(QImage *image, const uchar *buffer, int length, break; case ImageDataBlock: count++; - if (bitcount < 0 || bitcount > 31) { - state = Error; - return -1; + if (bitcount != -32768) { + if (bitcount < 0 || bitcount > 31) { + state = Error; + return -1; + } + accum |= (ch << bitcount); + bitcount += 8; } - accum|=(ch<<bitcount); - bitcount+=8; while (bitcount>=code_size && state==ImageDataBlock) { int code=accum&((1<<code_size)-1); bitcount-=code_size; |