[Bug 87345] Severe noise corruption observed while running WebGL “Fluid Simulation ”

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87345

qiang.miao at intel.com changed:

           What    |Removed                     |Added
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             Status|RESOLVED                    |REOPENED
         Resolution|NOTOURBUG                   |---

--- Comment #9 from qiang.miao at intel.com ---
Can't agree with you
Why the same code can work correctly on Windows?

If these variables areundefined variables like you said
WebGL will report error and draw nothing

+  vec2 uv = vec2(0, 0);
   vec2 motion = decode2( texture2D(sampler_fluid, uv))*pixelSize*0.75;

-  vec2 uv = uv - motion; // add fluid motion
+  uv = uv - motion; // add fluid motion


-  vec2 gz; // blue blur2 gradient vector
+  vec2 gz = vec2(0, 0); // blue blur2 gradient vector

Those variables are defined without initial value
There is something wrong with shader compiler on how to handle default value

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