Colours

[mreaves]

I have a PNG file that just contains a single colour (black font), how easy is it to change the black colour to another colour and generate different coloured fonts?

Basically I load in the PNG as raw data before creating an image from it, could I change the palette entry before I convert it to a PNG and expect this to work?

[DinkyDino]

Yes you can - go and read up on the PNG file specification - one point to note, make sure you update the CRC check for the palette too!

[mreaves]

Yeah, I figured this yesterday and got it working so I can generate as many run-time variations as I need. Didn't realise about the CRC. What would happen if I didn't change that? My system works on the emulator and hardware, my worry is would it work on all hardware.

[mreaves]

I'll answer my own question on this, yes it does mattter on some handsets.

Some are fine with it, other crash. I have also noticed similar problems when using PNGOUT, some of the graphics it outputs are not liked by some handsets. certain Nokia 6230 models for instance.