Gameboy Development Forum

Tomi · 2020-05-01 10:01:03

hi all,

when i create DMG tile data (source .png image is 4 shades of gray) with rgbgfx, "colors" are inverted (my palette is default %11100100).
what am I doing wrong? In the manual I do not see any command line option allowing to invert "colors".

h0tp3ngu1n · 2020-05-02 19:53:09

I've never used rgbgfx, so I'm not sure. But did you remember to also set the palette in your game? (Do that by writing %11100100 to the palette's address https://gbdev.gg8.se/wiki/articles/Vide … e_Palettes ) If that doesn't work, maybe try writing %00011011 instead.

Tomi · 2020-05-03 02:06:16

Yes, the palette is correctly set in the game. Tile data colors are inverted in the file generated by either rgbfx and superfamiconv also. But not if I generate tile data with any other tool than thesese 2. ??????????????????????? I really do not see where it can come from

ISSOtm · 2020-05-03 05:15:55

Is your PNG indexed (paletted), grayscale, or just plain RGB? The latter two cause the tools to determine the color indexes automatically, and they may not be what you're looking for.

Tomi · 2020-05-03 09:07:21

If I remember well, My png is grayscaled with gimp. How do I eventually « unindex » or « ungreyscale « it?

ISSOtm · 2020-05-03 14:42:03

In GIMP, go to Image > Mode and select Indexed. You may then manually arrange the color map, if you want to, by going to Colors > Map > Rearrange Colormap...

Tomi · 2020-05-04 02:17:35

Great, it works! Thank you !!!!!!

Gameboy Development Forum

#1 2020-05-01 10:01:03

rgbgfx

#2 2020-05-02 19:53:09

Re: rgbgfx

#3 2020-05-03 02:06:16

Re: rgbgfx

#4 2020-05-03 05:15:55

Re: rgbgfx

#5 2020-05-03 09:07:21

Re: rgbgfx

#6 2020-05-03 14:42:03

Re: rgbgfx

#7 2020-05-04 02:17:35

Re: rgbgfx

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