This limits the length of uniform and attrib identifiers to 4095 characters, to steer clear GL implementation bugs with too long identifiers. The 4095 is totally arbitrary, all we know is that crashes happen after 2^22 chars.
This ANGLE update fixes bugs, brings large performance improvements, and adds major new features that web devs are looking forward to: vertex shader texture lookup and float textures.
http://code.google.com/p/angleproject/
This update is also needed because the version we're currently using is the chrome_m10 branch and that's no longer maintained. This update will make it much easier to apply security fixes if needed.
The rectangle parameter is currently not used --- all callers always pass the full canvas bounds. In the long term,
we probably won't want this parameter since all implementations should be doing accelerated drawing direct to buffers
with no intermediate copies, hence there will be no need to optimize the size of those copies. Plus, performance-sensitive
testcases tend to paint most or all of the canvas on every frame anyway.
The rectangle parameter is currently not used --- all callers always pass the full canvas bounds. In the long term,
we probably won't want this parameter since all implementations should be doing accelerated drawing direct to buffers
with no intermediate copies, hence there will be no need to optimize the size of those copies. Plus, performance-sensitive
testcases tend to paint most or all of the canvas on every frame anyway.
