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Opened 14 years ago

Closed 12 years ago

#4955 closed enhancement (fixed)

Feature Request: PicLayer: Specify Opacity and Alpha channel/color

Reported by: DiverCTH <chunter952@…> Owned by: team
Priority: normal Milestone:
Component: Core Version: latest
Keywords: PicLayer Alpha Channel Color Cc:

Description (last modified by Larry0ua)

It would be useful to mark an alpha channel / transparent color in images being referenced in PicLayer.

I'm going through some hand-drawn fire escape maps and have to layer scans on top of each other. It would be useful to have a color picker to identify a transparent color so that overlapping layers can be viewed simultaneously.

The current behavior is for each layer to be opaque to the one below it.

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Change History (3)

comment:1 by stoecker, 14 years ago

Component: Plugin → Plugin piclayer

comment:2 by Olivier Croquette <ocroquette@…>, 13 years ago

As a workaround until this is implemented, one can use ImageMagick :
convert file1.png -alpha set -channel RGBA -fill none -opaque black file2.png

comment:3 by Larry0ua, 12 years ago

Component: Plugin piclayer → Core
Description: modified (diff)
Resolution: → fixed
Status: new → closed

this functionality is already in josm core - you can set opacity of the layer in layers list.

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