layout: Implement image-rendering per CSS-IMAGES-3 § 5.3 and

`background-size` per CSS-BACKGROUNDS § 3.9.

Nearest neighbor interpolation is used for `crisp-edges`, like Firefox.
A note has been added that we could do better if we wanted to.

Multiple backgrounds are not yet supported.
This commit is contained in:
Patrick Walton 2014-12-13 19:09:06 -08:00 committed by Simon Sapin
parent 6fcc02e92f
commit 09c53f461d
16 changed files with 521 additions and 34 deletions

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<!DOCTYPE html>
<html>
<head>
<!-- Tests that `image-rendering: auto` uses bilinear filtering. -->
</head>
<body>
<img width=100 height=50 src=4x2.png>
</body>
</html>