Hello,

I have an indexed PNG and want to edit the transparency of it - my problem: Transparency is either 0% or 100%

What I'd like to have: I'd like to add a transparency value to each of the 255 indexed colours - so colour 1 is totally transparent, and the others transparency should be set to something between 50% and 90% depending on their brightness (white -> 90%, black -> 50% or something similar) - (I wouldn't mind to edit the 255 colours by hand if necessary).

I did something like this few years ago, but can't reconstruct how I did it - though I ended up with a 24 bit per Pixel PNG, so maybe it's not possible to have an indexed PNG with varying degrees of transparency!?

If I open the indexed PNG it shows two channels, one with the image information and the other with transparency information is a black or transparent thing with nothing inbetween (seems to be just 1 bit of info per pixel) - so maybe it's possible to change that part (and have 1 byte per pixel as well).

Thanks for any hints.

So I recently got a surface laptop studio and the pen to go with it, it's a touchscreen and it's specifically designed for drawing, but it would seem that gimp can't distinguish the pen from the cursor, and thus it's not detecting any pressure, nor does the other side function as a second pen. Any way to fix this?

Hello,
I am trying to get a XP PEN Deco 01 v2 to work with gimp on win10.  I have downloaded and installed their drivers.  However when ever I put the pen to the tablet in gimp it switches from the pencil tool to something that gives the attached image.  I have no idea what is going on.  (also please feel free to recommend any configurations as I am new to art with a drawing tablet.  I tried doing traditional but I find digital a lot easier for me)
https://imgur.com/a/NDLbVSD for the image

I scanned an insurance card and want to print it larger than it's actual size so the picture is easier to read.

I tried scanning to high dpi with no luck.

Is there a way to do that?

Hi Everyone,

I recently posted a problem with G'MIC and kept it brief, but haven't found a way to resolve the filter error. Below is more
detailed description.

While using the G’MIC Mandelbrot / Julia filter, my wireless mouse seemed to randomly change the filter settings, I simply turned it off and on again which fixed that problem, but when clicking OK I now receive this message:

“Error in ./fx_mandelbrot/ *** Command ‘input’: File ‘0’, format does not take any input options (options ‘0’ specified).”

The mouse definitely created the fault, could someone please help.

Thanks

I'm currently trying to change a logo in gimp. I need to do two things, make the background transparent so it can be inserted into another document and swap two colours around. I've managed to it transparent with some decent results with the anti-aliased edges using Colour to Alpha. The next thing is changing the colours - I can't figure out how to change them and make it look decent with anti-aliased edges. If I fill, it looks terrible. I just need to swap the pink for the white. What's the best gimp tool to achieve this?

Many thanks

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Mandelbrot and Julia, nice graphic combinations : https://fraqtive.mimec.org
   

Is it possible to activate detachable submenus on recent GIMP 2.10?

Quote:Detached submenus originating from the Toolbox are only visible when the Toolbox is active. Detached submenus originating from the Image window are actually independent. They are always visible, their functions always apply to the current image, and they persist when all of the images are closed. You can close a detached submenu by clicking on the dotted line again or closing the window from the window manager on your computer (often by clicking on an X icon in the upper right corner of the window).

Last time i've reported a bug was in bugzilla as far as i remember...
Here's a little tiny bug in the development version 2.99.15 and i'm not sure if it should be reported and if so where an how...
Selecting layers step by step holding the shift-key starting from the uppermost layer downwards selects only two layers.
As soon as you select a third layer the first selected layer will be deselected.
Doing the same from the lowest layer upwards works correctly as expected.

Michael