03-26-2021, 11:12 AM
Hi all,
I have a 256-colour indexed image I generated with a program I am working on. I want to load it in GIMP, modify a few pixels, and then save it again.
However when I do this, GIMP rearranges the colour map, swapping entries 0 and 1. When I read the image back with my program, these two colours appear wrong as they are supposed to match an existing external palette.
If I use the "Colors | Map | Rearrange Colormap" option to swap entries 0 and 1 to put them back in their original order, when I save the file and reload it I find that GIMP has put them back the wrong way around.
If I load and save the file with the colours the wrong way around GIMP leaves them alone!
I cannot work out how to get GIMP to save the file without rearranging the palette.
Am I doing something wrong? I'm using GIMP 2.10.22 and this is the file I am trying to edit. Entry 0 is meant to be black and entry 1 is meant to be dark blue, which is shown when the image is first loaded, but it seems impossible to save the image like this, with black as 0 and blue as 1.
Any suggestions would be appreciated!
I have a 256-colour indexed image I generated with a program I am working on. I want to load it in GIMP, modify a few pixels, and then save it again.
However when I do this, GIMP rearranges the colour map, swapping entries 0 and 1. When I read the image back with my program, these two colours appear wrong as they are supposed to match an existing external palette.
If I use the "Colors | Map | Rearrange Colormap" option to swap entries 0 and 1 to put them back in their original order, when I save the file and reload it I find that GIMP has put them back the wrong way around.
If I load and save the file with the colours the wrong way around GIMP leaves them alone!
I cannot work out how to get GIMP to save the file without rearranging the palette.
Am I doing something wrong? I'm using GIMP 2.10.22 and this is the file I am trying to edit. Entry 0 is meant to be black and entry 1 is meant to be dark blue, which is shown when the image is first loaded, but it seems impossible to save the image like this, with black as 0 and blue as 1.
Any suggestions would be appreciated!