Legacy ImageMagick Discussions Archive

even if i use ScaleCharToQuantum, i still have the same problems..

Thank you very much for the replays. It seems like my code but if I use GetAuthenticPixels it return always NULL ... It work just with GetCacheViewVirtualPixels. About jpg indeed I try to use JPG , how can I fix it? (also i have problem in png, in png works better but after around 30 pixels one is ...

I want to develop an encryption/decryption algorithm using last bits of a photo. Everything it's seems ok (bit mask all that stuff), i obtain the desired modified pixels (RGB) from the image. The only problem is when I try to write them. It's very frustrating and I don't know what I do worng. Let's ...