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Colour to Alpha Colour Picker

Jul 26, 2013, 13:02
Post: #1
Colour to Alpha Colour Picker
Windows 7 and Gimp 2.8.2 in single window mode.

I am trying to to use Colour to Alpha by picking a specific colour from an image. But I can't get the colour picker to work.

The image has an alpha channel.

I choose Colour to Alpha, then click on the From swatch. The Colour to Alpha Colour Picker window appears. I click on the eyedropper. But when I move the eyedropper over the image, the cursor changes to the previous tool that was used. For example, if I used the zoom tool, the eyedropper changes to zoom as the cursor leaves the Colour to Alpha Colour Picker window, and zoom becomes active.

How do I pick a colour from the image?
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Jul 26, 2013, 13:36
Post: #2
RE: Colour to Alpha Colour Picker
Well, I just tried it, and if you click it should select the color, however the tool that you had selected will do its thing as well (i.e. if a paintbrush is selected it will paint a dot). Possibly a bug?

Anyway, if you Bucket Fill the entire image in Color erase mode, it produces the exact same effect as Color to Alpha. It might be a more convenient method for you, because you can just use normal FG/BG colors.
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