GraphicImage Template

alphaBlendMode()

Set the alpha channel merge mode

Syntax

GraphicImage = rb.GraphicImage.alphaBlendMode()

Parameters

The 'alphaBlendMode' method takes no parameters

Results

The 'alphaBlendMode' method returns GraphicImage:

Remarks

By default when merging images (which has to happen to copy rectangles/resize images etc) the class will create a completely opaque target image by merging the colours and transparency of the source and destination.

Calling this method with 'false' will cause the source image to copy all pixels to the destination (no merging) including alpha channel information. This is generally what's required when manipulating images such as PNGs with a full alpha channel.