ImageSetDrawingAlpha()
Sets the current drawing alpha for images. All subsequent graphics operations use the specified alpha.
Requires Extension: Image extension
ImageSetDrawingAlpha( image=any, alpha=number );
Returns: void
Argument | Description |
---|---|
image
any,
required
|
The image on which this operation is performed. Alias: name |
alpha
number,
required
|
a floating point number in range 0-1 |
Examples
img=imageNew("", 250, 250, "RGB", "a29bfe");
imagesetDrawingAlpha(img ,0.3);
imagedrawRect(img, 50, 50, 50, 50);
imagesetDrawingAlpha(img ,0.6);
imagedrawRect(img, 75, 75, 75, 75);
imagesetDrawingAlpha(img ,1);
imagedrawRect(img, 100, 100, 100, 100);
writeOutput(img);
See also
- Image manipulation
- image.setDrawingAlpha()
- Search Issue Tracker
- Search Lucee Test Cases (good for further, detailed examples)