<WDPic variable>.PixelOpacity (Function)

ONLINE HELP
WINDEV, WEBDEV AND WINDEV MOBILE

Version:

Home | Sign in | English

Help / WLanguage / WLanguage functions / Controls, pages and windows / Drawing functions

Coordinates
Drawing in an image with opacity
Drawing in PHP
Drawing in Browser code

WINDEV

WEBDEV

WINDEV Mobile

Others

See also

<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

MonImageWDPic is WDPic = "Test.gif"
// Identification de l'opacité du pixel (15, 25)
// sur la variable MonImageWDPic
ResOpacité = MonImageWDPic.PixelOpacité(15, 25)
IMG_MonDessin = MonImageWDPic

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