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Type: Bug
Resolution: Duplicate
Priority: Low
Fix Version/s: None
Affects Version/s: 2.5.7, 2.6.0, 2.10.1
Component/s: None
Labels:

The thumbnail macro renders transparent backgrounds as black, for GIF images.

PNGs are fine, and JPG doesn't support transparency anyway, so GIF is the only affected format.
A quick-and-dirty interim workaround would be to change the default to a white background, as that would reduce the impact of the issue.

causes

CONFSERVER-20025 Image background color changes from black to white when changing size for transparent images

Closed

is duplicated by

CONFSERVER-14286 Image thumbnail does not preserve PNG image transparency

Closed

CONFSERVER-12424 Gallery macro displays the wrong thumbnail when two attachments share the same filename but different file types.

Closed

is related to

CONFSERVER-13532 GIF/PNG transparency lost in Avatar resizing, makes my head look funny

Closed

CONFSERVER-9988 Prevent images without background from turning to a black background while using the gallery macro

Closed

is superseded by

CONFSERVER-21480 Fix the Thumbnail rendering that fails for transparent images (PNG/GIF) and for certain images with embedded color profiles (CMMException)

Closed

relates to

CONFSERVER-9977 Thumbnails for interlaced gifs are broken

Closed

(1 is superseded by, 1 relates to)

Assignee:: Unassigned
Reporter:: James Fleming (Inactive)
Votes:: 29 Vote for this issue
Watchers:: 23 Start watching this issue

Created:: 08/Nov/2007 12:32 AM
Updated:: 11/Oct/2018 8:55 AM
Resolved:: 07/Jan/2011 2:16 AM

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