Format
Blend(icon,function=ICON_ADD,x=1,y=1)
Args
icon: an icon file, /icon object, or colorfunction: the blending operation to usex, y: the position to blend the icon
The valid blending operations are:
- ICON_ADD
- ICON_SUBTRACT
- ICON_MULTIPLY
- ICON_OVERLAY
- ICON_AND
- ICON_OR
- ICON_UNDERLAY
The result is a combination of each corresponding pixel in the two icons. In all but ICON_OVERLAY, ICON_UNDERLAY, and ICON_OR, the transparent regions of the two icons are ORed together. That means if either icon is transparent on a given pixel, the result will be transparent. With ICON_OVERLAY or ICON_UNDERLAY, on the other hand, the original icon shows through wherever the top icon is transparent, giving the same effect as an overlay object, but resulting in only a single icon. In ICON_OR, the transparent regions are ANDed together; solid pixels are added together where they exist in both icons, or just pass through if the other icon is transparent at that pixel.
In addition to blending with an icon, an rgb() value may also be specified. This is treated identically to an icon of that same solid color, except that the x and y arguments will be ignored. Blending with a color blends the whole icon.
By default, the icons will line up at their lower left corners. If you want to position the second icon in a different place for blending, use the x and y arguments to specify where its lower left corner will be. 1,1 is the default, which is the lower left. 11,1 for instance would be 10 pixels to the right, and 1,21 would be 20 pixels up.