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  • Drawing in an image with opacity
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Stored procedures
Identifies the opacity of a pixel of an image (background layer of a variable of type WDPic) with an Alpha channel.
Example
MyWDPicImage is WDPic = "Test.gif"
// Identify the opacity of the pixel (15, 25)
// on MyWDPicImage
ResOpacity = MyWDPicImage.PixelOpacity(15, 25)
IMG_MyDrawing = MyWDPicImage
Syntax
<Result> = <WDPic image>.PixelOpacity(<X-coordinate> , <Y-coordinate>)
<Result>: Integer
Opacity of specified pixel (included between 0 for transparent and 255 for opaque).
<WDPic image>: WDPic variable
Name of the WDPic variable to be used. Only the background layer will be handled.
<X-coordinate>: Integer
Horizontal position of pixel to use.
<Y-coordinate>: Integer
Vertical position of pixel to use.
Remarks

Coordinates

Coordinates are given in pixels with respect to the upper-left corner of the image (coordinates: (0.0)).

Drawing in an image with opacity

To specify that the drawing in the image supports opacity (Alpha channel), use <WDPic variable>.StartDrawing and the dWithOpacity constant.
Component: wd270obj.dll
Minimum version required
  • Version 25
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