Neither the Chromium 13 nightly nor Firefox 4 in Natty enable WebGL for
my card, though Firefox 4 does let me bypass its blacklist with an
envvar MOZ_GLX_IGNORE_BLACKLIST.
With that enabled, the page now displays correctly for me. Feel free to
close this bug.
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You received this bug notificatio
Public bug reported:
Trying to build something on WebGL technology, I noticed that basic
shaders were producing incorrect output. The problem occurs on both
Firefox 4 and Chrome 7. I'm on Intel GM965 hardware, but strangely also
see the exact same problem when I install `libgl1-mesa-swrast` or try
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Basic shaders produce incorrect output
https://bugs.launchpad.net/bugs/676183
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which is subscribed to mesa in ubuntu.
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Here's the example page as an attachment, for archiving.
Perhaps useful to add, some other things I've tried:
* Drawing interpolated color shades using a varying variable works.
* Functions like `dot` and `max` produce valid float output. For example,
using these two, I can implement just the
After some more experimentation, it looks like it's specifically a
problem with float literals, which are floored / truncated. Things work
when I simply replace them with uniforms and set their value in
JavaScript.
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Basic shaders produce incorrect output
https://bugs.launchpad.net/bugs/676183
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