Saving image to file with IImageEncoder

Question

Hi, do you have a working code to share.

I’m trying to figure out how to save to a file an IBitmapImage image.

I need to resize existing .jpg file and it seems like the only API for Windows Mobile. I managed to load it convert it to IImage -> IBitmapImage -> IBasicBitmapOps and resize it finally, but I have no clue how to save it properly to a new file.

Answer 1

Use IBitmapImage::LockBits to get access to the image data via its BitmapData* lockedBitmapData parameter. Use the BitmapData to prepare a bitmap file info header, then write that one and the image data in BitmapData::Scan0 to a file using regular file writing with ::WriteFile or higher level ones if you use such.