[Libjpeg-devel-6x] read image from memory

[Radim <we...@se...>]

I would like to save and read images from database. Is there any way how to 
decompress image without reading it from file stream or compress it without 
writing to the file stream? I mean I would like to work with it only in 
memory. The images should be in database and I don't see the sense of 
writing the images into separate files on disk because these would be huge 
numbers of files. There is one more reason for it. There is 250 bytes in the
begin of file which are same for every image so I would like to remove these
250 bytes and write them to db. So when reading data from db, I would 
complete the file in memory and then would like to be opened by libjpeg.