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Bug: Gaussian Blur and Unfocus with semi-transparent pixels


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    * Fixed: The Unfocus effect was not handling alpha values properly.

Sorry to discover this so late but:

Unfocus effect now handles color values of semi-transparent pixels inproperly.

Also, Gaussian Blur handles alpha AND color values of semi-transparent pixels inproperly.

Check this sample with color picker:


Original rectangle on the left is uniform color but bottom side's alpha is reduced to 85 for testing purpose.

Unfocus seems to reduce semitransparent pixel's Value,

while Gaussian Blur reduces both Value and Alpha.

Please kindly fix this.

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