Hello

I'm saving a picture out as a Mode 5 PNG, and the resolution comes back as 320x256.

Shouldn't it be 160x256 or am I being dopey?

320x256 retains the correct aspect ratio of a MODE5 screen, though each 'BBC' pixel corresponds to two 'real' png pixels.

Saving as 160x256 will retain the 1-to-1 pixel mapping between 'BBC' pixels and png pixels, but at the express of an incorrect (horizontally squashed) aspect ratio.

Aye fair enough I suppose. I was using it to save out as a PNG then run it through my exporter to create BBC graphics. Not to worry, I can just scale it down 1/2 first.

Cheers

What are you exporting the image as in your exporter?

Unless I am missing something in what you are trying to do, saving the image as a BBC screen dump instead of a PNG will give you an image ready for use on a BBC without the need for any other exporter tools.

Kind regards,

Francis.

Hi Francis

What I was doing was saving as a PNG (so I get a proper BBC palette), then running through my code to re-arrange the pixels in a format I can INCBIN them easily to my 6502 code for example for certain effects.

It's not a problem really, I can just re-scale the image in Photoshop/Gimp to get it to 160!

Great little app by the way, good job

Ah, I see.

I may in future include an option to save images with an uncorrected aspect ratio.

Kind regards,

Francis.