TypeLib Xojo support Plugin |
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RawBitmap.FillRectAlpha Method
Draws only the alpha channel of filled rectangle

FillRectAlpha(
x
as Integer,
y
as Integer,
width
as Integer,
height
as Integer,
alpha
as UInt8)
Parameters
- x
- x coordinate of top left corner of the rectangle.
- y
- y coordinate of top left corner of the rectangle.
- width
- width of the rectangle.
- height
- height of the rectangle.
- alpha
- The alpha value 0 - 255 as its represented in a bitmap (reverse to how Xojo color represents the Alpha)
Remarks
If the RawBitmap has no alpha channel then this method 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