imagealphablending
(PHP 4 >= 4.0.6)
imagealphablending -- Set the blending mode for an image
Description
bool 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. If blendmode is TRUE, then
blending mode is enabled, otherwise disabled. Returns TRUE
on success or FALSE on failure.
Note: This function was added in PHP 4.0.6 and requires
GD 2.0.1
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