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PODRĘCZNIK PHP 5.x, 4.x, 3.x - częściowo spolszczony / źródło: www.php.net
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imagecolorexactalpha (PHP 4 >= 4.0.6, PHP 5) imagecolorexactalpha -- Get the index of the specified color + alpha Descriptionint imagecolorexactalpha ( resource image, int red, int green, int blue, int alpha )
Returns the index of the specified color+alpha in the palette of the
image.
If the color does not exist in the image's palette, -1 is
returned.
Notatka: Fa funkcja wymaga GD 2.0.1 lub nowszego.
See also imagecolorclosestalpha().
User Contributed Notesmatt at matt-darby dot com
12-Jul-2005 03:09
Note that a color allocated with imagecolorexactalpha won't show alpha (it will be opaque) when used with imageline(). Use imagerectangle() set to your normal start and end points instead.
Ensure that the image is created via imagecreatetruecolor() as well!
phpdoc-comment at aditus dot nu
08-Nov-2002 07:01
What might be misleading in the docs is that if the specified color + alpha channel does not exist it will be created. So if you like to use an alpha channel in your image enable alpha blending and then create you color using this method.
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