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LibWeb: Share decoded images at the Resource level :^)

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This patch adds ImageResource as a subclass of Resource. This new class
also keeps a Gfx::ImageDecoder so that we can share decoded bitmaps
between all clients of an image resource inside LibWeb.

With this, we now share both encoded and decoded data for images. :^)

I had to change how the purgeable-volatile flag is updated to keep the
volatile-images-outside-the-visible-viewport optimization working.
HTMLImageElement now inherits from ImageResourceClient (a subclass of
ResourceClient with additional image-specific stuff) and informs its
ImageResource about whether it's inside the viewport or outside.

This is pretty awesome! :^)
This commit is contained in:
Andreas Kling 2020-06-02 20:27:26 +02:00
parent 1c6e4e04a8
commit d4ddb0013c
14 changed files with 200 additions and 30 deletions
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9
Base/home/anon/www/many-buggies.html Normal file
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@ -0,0 +1,9 @@
<html>
<body>
<img src=http://serenityos.org/buggie.png>
<img src=http://serenityos.org/buggie.png>
<img src=http://serenityos.org/buggie.png>
<img src=http://serenityos.org/buggie.png>
<img src=http://serenityos.org/buggie.png>
</body>
</html>

1
Base/home/anon/www/welcome.html
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@ -28,6 +28,7 @@ span#ua {
<p>Your user agent is: <b><span id="ua"></span></b></p>
<p>Some small test pages:</p>
<ul>
<li><a href="many.html">many buggies</a></li>
<li><a href="palette.html">system palette color css extension</a></li>
<li><a href="inline-block-link.html">link inside display: inline-block</a></li>
<li><a href="set-interval.html">setInterval() test</a></li>