PHP imagealphablending function

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imagealphablending

(PHP 4 >= 4.0.6, PHP 5)

imagealphablending — Set the blending mode for an imageDescriptionbool imagealphablending ( resource image, bool blendmode )

imagealphablending() allows for two different
modes of drawing on truecolor images. In blending mode, the
alpha channel component of the color supplied to all drawing function,
such as imagesetpixel() determines how much of the
underlying color should be allowed to shine through. As a result, gd
automatically blends the existing color at that point with the drawing color,
and stores the result in the image. The resulting pixel is opaque. In
non-blending mode, the drawing color is copied literally with its alpha channel
information, replacing the destination pixel. Blending mode is not available
when drawing on palette images.

Parameters

image

An image resource, returned by one of the image creation functions,
such as imagecreatetruecolor().

blendmode

Wether to enable the blending mode or not. Default to FALSE.

Return Values

Returns TRUE on success or FALSE on failure.

Notes

Note: This function requires GD 2.0.1 or later (2.0.28 or later is recommended).