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Im trying to convert a JPEG image, which ive already loaded into memory, into a BMP (also in memory). I tried using the libjpeg release from IJG but it has over 100+ errors in it and refuses to compile. Can anyone provide an example using the GDI to process images entirely in memory.
One approach would be to use OleLOadPicture and/or OleLoadPicturePath; there's an example here.
Well, the whole thing is I already have the image in memory, so it isnt from a stream source technically. Although I think it might work with HINTERNET style handles.
I ended up using CxImage, which is based on the IJG code, but comes with all the project files, and compiles without any editing under VC++ 6.0. It supports direct memory to memory conversion to and from multiple formats, including JPG BMP PNG TIFF and others.