(PHP 4 >= 4.0.6)
ImageAlphaBlending -- Set the blending mode for an image
Description
int imagealphablending (resource im, 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.
Note: This function was added in PHP 4.0.6 and requires GD 2.0.1
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