Glsl shader imageStore only works with rgba32f image format

[Alfonse_Reinheart]

@numanoid

However even with mathematical rounding on the CPU, the resulting color values don’t exactly match with those of the pure-float compute shader (I guess due to different rounding methods/precision?).
So now my question is, what’s the more accurate method of color conversion in this case?

You should look into these two posts for details, but the short version is that floating-point normalization uses implementation-defined rounding. So unless you do normalization manually, you cannot guarantee that a floating-point value of 0.5 will produce a normalized integer value of 1.