Chromium Blog
News and developments from the open source browser project
GPU accelerating 2D Canvas and enabling 3D content for older GPUs
Thursday, February 9, 2012
Today’s
Beta release
brings 2D Canvas improvements and a software rasterizer to Chrome.
For most Windows and Mac users, we’ve enabled GPU-accelerated rendering of 2D
Canvas
content, so that canvas-based games and animations run faster and feel smoother. You can go to
chrome://gpu
to see which features are being accelerated. This is a tricky area to optimize, due to the wide variety of hardware and operating system configurations found in the wild. We’ve made a series of small improvements to the way this acceleration works in the latest release, and we're seeking feedback on it from our Beta users. If you notice performance problems with 2D Canvas graphics content, particularly if you’re a web developer using 2D Canvas on your site, please
file a bug
.
At the same time, we
recognize
that many people with older GPUs and graphics drivers have not been able to experience the rich content provided by technologies such as
WebGL
. Chrome is now able to display 3D content via
SwiftShader
, a software rasterizer we licensed from TransGaming, Inc. Although SwiftShader won’t perform as well as a real GPU, it will be an improvement for many of our users on older operating systems such as Windows XP.
SwiftShader automatically kicks in for those users who cannot run content on the GPU. If you want to take a peek at what the performance is like with SwiftShader, you can use the
--blacklist-accelerated-compositing
and
--blacklist-webgl
flags, wait a few minutes for the automatic download to complete, and then load the relevant web page.
As always, we appreciate your willingness to try out our creaky
Beta
software and look forward to your feedback and bug reports.
Posted by John Bauman and Brian Salomon, Software and Pixel Engineers
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