84859 - Scaled transparent images rendered very badly

Status: VERIFIED DUPLICATE of bug 74313

(Core :: Graphics: ImageLib, defect)

Description

[Brian]

From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux 2.4.2-2 i686; en-US; rv:0.9.1) Gecko/20010607
BuildID:    2001060713

When the size of a transparent image is specified and is not the actual size of
the image, the image is not entirely displayed unless the user scrolls the image
off the top of the screen, then (via mouse-wheel or up arrow) scrolls the image
back into view.  Also, rendering slows down noticeably when a scaled image
(transparent or not) comes into view.

Reproducible: Always
Steps to Reproduce:
1. Put a scaled png on an html page
2. Put an unscaled version of the same on the page
3. View in browser; marvel at the cropped (sometimes completely missing) scaled
version.

Actual Results:  Various portions of the scaled image get dropped.

Expected Results:  The entire image should show, compressed or extended as
appropriate.

I will attach a file and 3 images (1 transparent png, 1 transparent gif, and 1
(obviously) nontransparent jpeg) to illustrate the problem.

Comment 1

[Brian]

Attachment: file illustrating problem

Comment 2

[Brian]

Attachment: sample png, transparent

Comment 3

[Brian]

Attachment: sample gif, transparent

Comment 4

[Brian]

Attachment: sample jpeg, nontransparent

Comment 5

[Brian]

Attached a file and 3 images referenced therein.

Comment 6

[R.K.Aa.]

Marking dup of bug 74313 - there is a general scaling problem on linux.

*** This bug has been marked as a duplicate of 74313 ***

Comment 7

[Terri Preston]

Verified Duplicate