TypeLib Xojo support Plugin

RawBitmap.PixelAlpha Method

Sets or gets the alpha value for pixel at given location

PixelAlpha(
   x as Integer,
   y as Integer) as UInt8

PixelAlpha(
   x as Integer,
   y as Integer
   assigns value as UInt8)

Parameters

x
The x coordinate to set or get (zero based)
y
The y coordinate to set or get (zero based)
value (assignment parameter)
The alpha value 0 - 255 as its represented in a bitmap (reverse to how Xojo color represents the Alpha)

Returns

UInt8
The alpha value when using the getter.

Remarks

If the RawBitmap has no alpha channel then this getter / setter function does nothing.

This method has no meaningful result when using CMYK colorspace.

This method does nothing on 16bit per channel bitmaps.

See Also

RawBitmap Class