Swaps SrcChannel and DstChannel color or alpha channels of palette.

procedure SwapChannelsOfPalette(Pal: PPalette32; 
                                Entries: LongInt; 
                                SrcChannel: LongInt; 
                                DstChannel: LongInt);

Imaging (at line 283)

Use ChannelRed, ChannelBlue, ChannelGreen, ChannelAlpha constants to identify channels. Pal must be allocated to at least Entries * SizeOf(TColor32Rec) bytes.