imagelayereffect
(PHP 4 >= 4.3.0, PHP 5)
imagelayereffect — Set the alpha blending flag to use the bundled libgd layering effects
Description
bool imagelayereffect
( resource $image
, int $effect
)
Parameters
-
image
-
An image resource, returned by one of the image creation functions,
such as imagecreatetruecolor().
-
effect
-
One of the following constants:
-
IMG_EFFECT_REPLACE
-
Use pixel replacement (equivalent of passing TRUE to
imagealphablending())
-
IMG_EFFECT_ALPHABLEND
-
Use normal pixel blending (equivalent of passing FALSE to
imagealphablending())
-
IMG_EFFECT_NORMAL
-
Same as IMG_EFFECT_ALPHABLEND.
-
IMG_EFFECT_OVERLAY
-
Overlay has the effect that black background pixels will remain
black, white background pixels will remain white, but grey
background pixels will take the colour of the foreground pixel.
Return Values
Returns TRUE on success or FALSE on failure.
Notes
Note: This function is only available if
PHP is compiled with the bundled version of the GD library.
Note: This function requires GD 2.0.1 or later (2.0.28 or later is recommended).
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