On 2016-05-26 12:08, Michael Van Canneyt wrote: > BUT: > depending on UsePalette, it contains indexes in the palette or RGB Data.
Oh, I forgot about Palette usage. I’ll have to check for that in my code. Does setting UsePalette := False at runtime auto convert palette data to RGB data? I had a look at TFPCustomImage.SetUsePalette() but it is not immediately obvious what it does at runtime (after image data was already loaded). > It is definitely possible that you are wrong. :-) Definitely not the first time that happened. > Yes. The Pixels array is a palette. The colors array is RGBA. Good to know the difference, thanks. >> 4) What is the order in which the colour channel information is stored >> in memory? RGB, BGR, RGBA, BGRA, ARGB, ABGR etc? > > You should not worry about this. The whole idea is that you do not use the > internal format, but just use the colors array: But that would be super slow. >> The reason for all these questions. I've got a image loaded in a >> TFPMemoryImage instance. I need to pass the the raw pixel data buffer to >> a 3rd party library for further processing. But I need to tell that >> 3rd party library a bit about the data I'm giving it (colour channel >> size, colour channel order etc). > > This is not supported for TFPMemoryImage. Well, I seem to have it almost working (see my other message with attached image). I didn’t know about the TFPCompactImgBase descendants - I’ll give them a try instead. That seems more like what I need. Many thanks for all the information Michael. Regards, Graeme -- fpGUI Toolkit - a cross-platform GUI toolkit using Free Pascal http://fpgui.sourceforge.net/ My public PGP key: http://tinyurl.com/graeme-pgp _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
