Hello there,
in GIMP 2.8 it was easily possible to export images as true 1 bit PNG files with binary Alpha: You simply create a small transparent image, draw a few black pixels onto it, and turn it into indexed mode image ("black & white palette", 1 bit). Gimp 2.8 correctly recognizes this as an image with 1 color only and when exported as PNG (I always uncheck all export options), it is saved as 1 bit PNG (with transparent & black as the only available colors in the palette, because no white is used).
Whereas in GIMP 2.10, when I repeat exactly the same steps, it always turns out to be a 2 bit image (transparent + black + white), although no white pixel is set anywhere in the image. It seems it refuses to reduce the image into 1 BPP palette, because it insists to have at least black & white, and thus won't allow me to export transparent 1 bit PNGs at all.
Is there anything that I have to configure to allow me to use this GIMP 2.8 feature again? It may seem like no big deal to anyone else, but this is a drawback for me, which keeps me stuck with GIMP 2.8 once again.
Maybe some expert can help with this issue.
Thanks in advance.
in GIMP 2.8 it was easily possible to export images as true 1 bit PNG files with binary Alpha: You simply create a small transparent image, draw a few black pixels onto it, and turn it into indexed mode image ("black & white palette", 1 bit). Gimp 2.8 correctly recognizes this as an image with 1 color only and when exported as PNG (I always uncheck all export options), it is saved as 1 bit PNG (with transparent & black as the only available colors in the palette, because no white is used).
Whereas in GIMP 2.10, when I repeat exactly the same steps, it always turns out to be a 2 bit image (transparent + black + white), although no white pixel is set anywhere in the image. It seems it refuses to reduce the image into 1 BPP palette, because it insists to have at least black & white, and thus won't allow me to export transparent 1 bit PNGs at all.
Is there anything that I have to configure to allow me to use this GIMP 2.8 feature again? It may seem like no big deal to anyone else, but this is a drawback for me, which keeps me stuck with GIMP 2.8 once again.
Maybe some expert can help with this issue.
Thanks in advance.