Re: [Tikiwiki-devel] YSLOW: one last low hanging fruit: Avoid AlphaImageLoader filter

[Jonny B. <jo...@ti...>]

Those are in colorbox.css, the jQuery shadowbox replacement and the notes there say:

    The following fixes png-transparency for IE6.  
    It is also necessary for png-transparency in IE7 & IE8 to avoid 'black halos' with the fade transition

so if we separate them out and only include them if feature_iepngfix=y it may adversely affect new IE's as well as IE6 - can someone on Windows test this please? Just delete the .cboxIE definitions from the end of lib/jquery/colorbox/styles/colorbox.css and have a look at some images in a filegal (click on one in browse mode).

jb

On 29 Jan 2010, at 02:39, Marc Laporte wrote:

> I get straight As (on
> the "small site or blog" score) expect for:
> 
> Grade B on Avoid AlphaImageLoader filter
> 
> There are a total of 8 filters
> 
>    * http://demo.tikiwiki.org/trunk2/temp/public/minified_fdf76368e9f85fa1edfae995eaa7af88.css
> 
> The IE-proprietary AlphaImageLoader filter attempts to fix a problem
> with semi-transparent true color PNG files in IE versions less than
> Version 7. However, this filter blocks rendering and freezes the
> browser while the image is being downloaded. Additionally, it
> increases memory consumption. The problem is further multiplied
> because it is applied per element, not per image.
> 
> 
> http://developer.yahoo.com/performance/rules.html#no_filters
> 
> Anyone know of a way to avoid this?
> 
> toggling feature_iepngfix has no effect -> Correct PNG images alpha
> transparency in IE6 (experimental)