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imagelayereffect()

imagelayereffect - Set the alpha blending flag to use the bundled libgd layering effects

Syntax

bool imagelayereffect (resource $image, int $effect)

Arguments

  • 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.

Description

Set the alpha blending flag to use the bundled libgd layering effects.

Version

PHP 4.3.0, 5

Return value

Returns TRUE on success or FALSE on failure.