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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Trine 2's fragment normal buffer is mixtextured on Radeon HD 6770 (Juniper)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=66067#c11">Comment # 11</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Trine 2's fragment normal buffer is mixtextured on Radeon HD 6770 (Juniper)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=66067">bug 66067</a>
from <span class="vcard"><a class="email" href="mailto:greg@chown.ath.cx" title="Grigori Goronzy <greg@chown.ath.cx>"> <span class="fn">Grigori Goronzy</span></a>
</span></b>
<pre><span class="quote">> ARB_fragment_program_shadow may leave it undefined, but the GL spec ...</span >
Which spec exactly? GL specifications only cover GLSL shaders.
ARB_fragment_program is separate from that and has its own rules. The extension
specification clearly states that behaviour is undefined.
Besides, OpenGL contradicts itself a little bit: in GL 4.4 spec, 15.2.1 it
states that behaviour is undefined for this case, too. It makes much more sense
anyway, shadow sampling is wildly different from sampling a texture normally in
terms of what the sampling result look like.</pre>
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