This repository was archived by the owner on Sep 15, 2025. It is now read-only.
Greyscale bug #5
Description
I found and fixed a nasty bug regarding greyscale JPEGs. The following condition in the else branch of Image.ConvertYcc is wrong:
https://github.com/JBildstein/NanoJpeg.Net/blob/c200b00cc4b3821303907abbada2508d36ad09a7/NanoJpeg/Image.Convert.cs#L76
If stride and width are equal, greyscale images will not be handled and have the Data field left at null.
The difference between stride and width is checked a few lines below and the case where they are equal is completely fine, and even handled correctly. The condition should rather be:
else if (channels.Length == 1)Note that this is already a bug in the original NanoJPEG.