Yenya's World

Mon, 29 Jan 2007

PNG Transparency (continued)

Well, the problem of PNG transparency was more complicated than I thought. Firstly, how does it work: the original approach tries to look up all the <img> tags in the document, and replace them by the following text:

<span ... style="width:XXXpx;height=YYYpx;filter:progid:
      DXImageTransform.Microsoft.AlphaImageLoader(src=
      'URL_TO_THE_IMAGE',sizingMethod='scale');">
</span>

There are problems with this approach, however:

After all, I have the PNG transparencey hack working, but the amount of dirty hacking needed to get it working is simply stunning.

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