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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - Invalid imageAtomicExchange() writes."
href="https://bugs.freedesktop.org/show_bug.cgi?id=106390#c14">Comment # 14</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - Invalid imageAtomicExchange() writes."
href="https://bugs.freedesktop.org/show_bug.cgi?id=106390">bug 106390</a>
from <span class="vcard"><a class="email" href="mailto:danylo.piliaiev@gmail.com" title="Danylo <danylo.piliaiev@gmail.com>"> <span class="fn">Danylo</span></a>
</span></b>
<pre>Returning to this there are several observations I can add:
1) imageAtomicExchange() works with constant data:
imageAtomicExchange(out_surface, ivec2(gl_GlobalInvocationID.xy),
0xFF00FF00);
works while with variable color it doesn't.
2) Vertical gradiesnt are fine, the issue appears only when having different
colors in a row.
3) In a row every pixel for which gl_LocalInvocationID.x == 0 has correct color
while other (local_size_x - 1) pixels inherit its gba channels' values so
vec4 color;
if (gl_LocalInvocationID.x == 0) {
color = vec4(1.0, 0.0, 0.0, 1.0);
} else {
color = vec4(0.0, gl_LocalInvocationID.x / float(GROUP_SIZE),
0.0, 1.0);
}
imageAtomicExchange(out_surface, ivec2(gl_GlobalInvocationID.xy),
packUnorm4x8(color));
produces red vertical lines with black color between them while it should
produce red lines with green gradient in between.
I don't have any ideas what's wrong here.</pre>
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