openlayers/ol3 — pull request #90 by elemoine (2012-12-12 15:08:45+00:00)
Title: WebGL color filter

The commits in this PR are a subset of the commits in #73.

@twpayne did some testing with the use of WebkitFilter in the DOM renderer, and observed some problems. Because of that he [suggested](https://github.com/openlayers/ol3/pull/73#issuecomment-11126451) to split the WebGL improvements to a separate PR. This PR is the result of that.

I also verified on the side-by-side example that the behavior is the same as before.

Please review (again :)