85735 - GIF display broken: transparent border area is ignored

Status: RESOLVED DUPLICATE of bug 86508

(Core :: Graphics: ImageLib, defect)

Description

[Francis Chin]

From Bugzilla Helper:
User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:0.9.1+) Gecko/20010613
BuildID:    2001061304

On GIFs which have zones around their edges that consist purely of transparent
pixels, these are cropped when the GIF is displayed, causing image misalignment.

Usually the transparent pixels are arranged as the top few rows of the image, so
the images are shifted up too high. The images are not stretched to compensate
(though it shouldn't do so).

On the URL given, at the bottom of the page are a row of GIFs (in anchor tags)
in a <td valign="bottom"> cell. Mozilla (post-imglib2) displays these wrongly,
so the alignment is crooked. NS4 and earlier Mozilla gets this right.

Reproducible: Always
Steps to Reproduce:
1.Look at a GIF with border(s) of purely transparent pixels.



Actual Results:  Image is rendered as if those rows/columns of pixels just
weren't there.

Expected Results:  Image is rendered with those rows/columns intact, transparent
or otherwise.

Comment 1

[Chad Austin]

I'm pretty sure this is a dup of 86508.

*** This bug has been marked as a duplicate of 86508 ***