228085 - Enable prettier image scaling and resizing for stand-alone images either

Status: RESOLVED DUPLICATE of bug 98971

(Core :: Layout: Images, Video, and HTML Frames, enhancement)

Description

[Brian 'netdragon' Bober]

Broken off of bug 98971 -- this bug is to enable pretty image scaling and make
it only happen for stand-alone images. We don't want it happening for web pages
because it'll slow-down rendering for those pages that abuse scaling. Perhaps
some-day we could provide a mozilla-specific CSS property until there are some
page zoom and image scaling quality CSS properties (if ever), but for now, we
probably only want to enable it for stand-alone.

nsImageDocument would be where we'd somehow enable it. Perhaps we will need a
moz-scaling-quality CSS property (default is bilinear) or something. What do you
think?

http://lxr.mozilla.org/seamonkey/source/content/html/document/src/nsImageDocument.cpp

Comment 1

[tor]

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

Comment 2

[Brian 'netdragon' Bober]

Why was this bug marked as a duplicate? This is a different issue since it deals
with stand-alone images, not the back-end aspects for different forms of
scaling. Bug 98971 is a bit too bloated and shouldn't deal with every issue that
involves image scaling.

Comment 3

[Brian 'netdragon' Bober]

The mozilla-specific CSS property -moz-scaling-quality would be handle also for
people who want to do something like implement a standalone mozilla-based image
viewer similiar to "Mozilla Picture and Fax Viewer".

Hixie: Would this be a good idea or not?

Comment 4

[Hixie (not reading bugmail)]

I don't understand why this isn't a duplicate. Our scaling code should be good 
quality and fast and not use much memory and should work for all the scaling in 
the app.

Comment 5

[Brian 'netdragon' Bober]

Is that reasonable that we can use the same kind of top-quality scaling for all
images? The tests run in bug 98971 seems to point to we might want to provide
different kinds of scaling in different cases because there are some times where
bicubic scaling would be too slow. I think a hidden CSS property would be useful
for that. Its why I asked you, though, and I trust your judgement on this sort
of thing.