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Set or attenuate the opacity channel in the image.

Component Version macOS Windows Linux Server iOS SDK
GraphicsMagick 2.0 ✅ Yes ✅ Yes ✅ Yes ✅ Yes ✅ Yes
MBS( "GMImage.Opacity"; ImageRef; opacity )   More


Parameter Description Example
ImageRef The image reference number. 1
opacity The opacity, range from 0 to 255. 127


Returns "OK" on success.


Set or attenuate the opacity channel in the image.
If the image pixels are opaque then they are set to the specified opacity value, otherwise they are blended with the supplied opacity value. The value of opacity ranges from 0 (completely opaque) to MaxRGB (65535). The defines OpaqueOpacity and TransparentOpacity are available to specify completely opaque or completely transparent, respectively.

See also

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This function checks for a license.

Created 18th August 2014, last changed 7th May 2020

GMImage.OilPaint - GMImage.Opaque