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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.
Versions 15 and later
WINDEV This function is now available for Java applications.
New in version 15
WINDEV This function is now available for Java applications.
WINDEV This function is now available for Java applications.
Versions 16 and later
WINDEV This function is now available for WINDEV applications in Linux.
New in version 16
WINDEV This function is now available for WINDEV applications in Linux.
WINDEV This function is now available for WINDEV applications in Linux.
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
See also
Minimum version required
  • Version 25
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