<WDPic variable>.PixelOpacity (Function)

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<WDPic variable>.PixelOpacity (Function)

In french: <Variable WDPic>.PixelOpacité

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: wd300obj.dll