223610 - Images are not antialiased when using Automatic Image Resizing until just before next page is loaded

Status: RESOLVED DUPLICATE of bug 98971

(Core Graveyard :: Image: Painting, defect)

Description

[Adam Butler]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5) Gecko/20031007 Firebird/0.7
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5) Gecko/20031007 Firebird/0.7

When using Automatic Image Resizing, images appear aliased and the edges are
distorted in a stair-step manner.  Antialiasing does not take effect when the
page is loaded, but instead when the page is unloaded.  When I load another
page, the image appears antialiased just before (maybe 100ms before) the next
page loads.  For a specific instance, if I am viewing an image which was resized
automatically then click the 'back' button, the image appears to be processed
antialias at the time the 'back' button is clicked and remains so until it
disappears at the time the next page begins to load.

Reproducible: Always

Steps to Reproduce:
1. View an image large enough that Automatic Image Resizing will take effect
2. Observe the image; notice the alias / blocky edges
3. Continue observing the image as you attempt to load a different web page
4. Notice that just before the new page begins to load and the current image
disappears, the image seems to be processed by an antialiasing algorithm,
resulting in a much smoother image that is perceptively closer to the un-resized
image

Actual Results:  
Image is aliased when the page loads, but appears to be antialiased a fraction
of a second after the browser is instructed to unload the image (page).

Expected Results:  
The resized image should be antialiased at the time the page containing the
resized image loaded.

I am not sure if any additional info would be relevant.  Of course, there are no
error messages displayed when the problem occurs.  Images too small for Auto
Image Resizing to have effect are unaffected.  Clicking the image to view it at
full size also corrects the problem (since the problem is a function of the
resizing).

Comment 1

[Kevin Brosnan]

I can confirm. 
Win XP
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.6a) Gecko/20031002
Firebird/0.7+
and
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5) Gecko/20031007

http://www.speedonline.com.br/wallpaper/77-1024.jpg
This is a good example; look at the pinstripes when image is resized.

Comment 2

[Bob Firth]

This isn't a firebird bug. Moving to Browser, I am guessing it's Image: GFX, but
am not sure. Hopefully someone there knows. ;)

I don't see the temporary anti-aliasing described in step 4. I do see the image
is not anti aliased when resized. This is in linux Gecko/20031007 Firebird/0.7

Comment 3

[Christian :Biesinger (don't email me, ping me on IRC)]

component is indeed right, but this is a duplicate 

*** This bug has been marked as a duplicate of 98971 ***