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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - glDispatchComputeGroupSizeARB : gl_GlobalInvocationID.x != gl_WorkGroupID.x * gl_LocalGroupSizeARB.x + gl_LocalInvocationID.x"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103393#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - glDispatchComputeGroupSizeARB : gl_GlobalInvocationID.x != gl_WorkGroupID.x * gl_LocalGroupSizeARB.x + gl_LocalInvocationID.x"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103393">bug 103393</a>
from <span class="vcard"><a class="email" href="mailto:stephane.chevigny@polymtl.ca" title="Stephane Chevigny <stephane.chevigny@polymtl.ca>"> <span class="fn">Stephane Chevigny</span></a>
</span></b>
<pre>The expected output:
value[i].x (= gl_GlobalInvocationID.x ;) should be equal to value[i].y and
value[i].w (= gl_WorkGroupID.x * gl_LocalGroupSizeARB.x +
gl_LocalInvocationID.x;) for all indices i according to spec. With the
parameter I gave to glDispatchComputeGroupSizeARB, the divergence of the result
happen after the indice i = 63 on my computer. So value[i].x = value[i].z
(=gl_LocalInvocationID.x;) instead.
So on my computer, gl_GlobalInvocationID.x appear to be only equal to
gl_LocalInvocationID.x notgl_WorkGroupID.x * gl_LocalGroupSizeARB.x +
gl_LocalInvocationID.x or I misread the spec.</pre>
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