imagecolorexact
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!
imagecolorexactalpha
(PHP 4 >= 4.0.6, PHP 5)
imagecolorexactalpha — Get the index of the specified color + alpha
Beschreibung
int 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.
Parameter-Liste
- image
-
Eine von den verschiedenen Erzeugungsfunktionen wie imagecreatetruecolor() gelieferte Grafikresource.
- red
-
Value of red component
- green
-
Value of green component
- blue
-
Value of blue component
- alpha
-
A value between 0 and 127. 0 indicates completely opaque while 127 indicates completely transparent.
Rückgabewerte
Returns the index of the specified color+alpha in the palette of the image, or -1 if the color does not exist in the image's palette.
Anmerkungen
Hinweis: Diese Funktion setzt die GD Bibliothek in der Version 2.0.1 oder höher (empfohlen wird mindestens 2.0.28) voraus.
add a note
User Contributed Notesimagecolorexactalpha
matt at matt-darby dot com
11-Jul-2005 06:09
11-Jul-2005 06:09
phpdoc-comment at aditus dot nu
08-Nov-2002 10:01
08-Nov-2002 10:01
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.