Indexed bmp - Export options gone

[eduardolucioac]

I'm using GIMP 2.8.22.

When I try to export an image to bmp format in indexed mode...



... the export options dialog no longer appears...



... after hit "Export"!

The options dialog only appears when the bmp image is in RGB mode...



This is the expected old behavior...



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How can I solve this? 

[Ofnuts]

Whex I try to export a color indexed image as BMP I  get this:

   

If I remove the alpha-channel (Image>Flatten image), I do get the dialog but the advanced options are grayed out:

   

[rich2005]

IMHO the OP has answered his own question. An indexed BMP is not RGB and that advanced dialogue is disabled.

What you get as an indexed bmp is an 8 bit image with no transparency.

No details of requirements given, but if transparency is needed, either an indexed png (8 bit) can be used or a gif.

[eduardolucioac]

@rich2005 Just to reinforce what my problem is... For bmp images in "Indexed" mode ( https://i.imgur.com/UMPqBcJ.png ) the dialog was displayed exactly as in the image https://i.imgur.com/w321vo9.png . This has changed in the latest version of Gimp (GIMP 2.8.22 in my case). I need these options for compatibility reasons with legacy applications.

How can I access these options again?

Thanks!

[rich2005]

(12-13-2017, 01:28 PM)eduardolucioac Wrote: @rich2005 Just to reinforce what my problem is... For bmp images in "Indexed" mode ( https://i.imgur.com/UMPqBcJ.png ) the dialog was displayed exactly as in the image https://i.imgur.com/w321vo9.png . This has changed in the latest version of Gimp (GIMP 2.8.22 in my case). I need these options for compatibility reasons with legacy applications.

How can I access these options again?

Thanks!

Nope.

Even if you are still using Gimp 2.6 If the image is indexed then the RGB options are not available.

see: https://i.imgur.com/XKZRU4A.jpg

Nothing has changed. 

Do you understand the difference between an Indexed image and a RGB image? A quick search and this is as good as any: http://www.drububu.com/tutorial/image-types.html

[eduardolucioac]

(12-13-2017, 10:17 AM)rich2005 Wrote: IMHO the OP has answered his own question. An indexed BMP is not RGB and that advanced dialogue is disabled.

What you get as an indexed bmp is an 8 bit image with no transparency.

No details of requirements given, but if transparency is needed, either an indexed png (8 bit) can be used or a gif.

(12-13-2017, 01:48 PM)rich2005 Wrote:

(12-13-2017, 01:28 PM)eduardolucioac Wrote: @rich2005 Just to reinforce what my problem is... For bmp images in "Indexed" mode ( https://i.imgur.com/UMPqBcJ.png ) the dialog was displayed exactly as in the image https://i.imgur.com/w321vo9.png . This has changed in the latest version of Gimp (GIMP 2.8.22 in my case). I need these options for compatibility reasons with legacy applications.

How can I access these options again?

Thanks!

Nope.

Even if you are still using Gimp 2.6 If the image is indexed then the RGB options are not available.

see: https://i.imgur.com/XKZRU4A.jpg

Nothing has changed. 

Do you understand the difference between an Indexed image and a RGB image? A quick search and this is as good as any: http://www.drububu.com/tutorial/image-types.html

Sorry, but I can assure you with 101% certainty that the options I cite were accessible for Indexed mode. I'm not crazy.

My solution at the moment is this:

 - Install "imagemagick" and "xcftools".

 - Run the command below in the folder where your "xcf" (gimp native) file is replacing "my_filename" with the name of your file...

Code:

FL_NAME="my_filename" && xcf2png $FL_NAME.xcf -o $FL_NAME.png && convert $FL_NAME.png -background black -alpha remove -alpha off -colors 256 -compress none BMP3:$FL_NAME.bmp

Done!

Thanks!