Name
transparent( ) — make a color transparent
Synopsis
GD::Image::transparent(colorindex
)
The transparent( )
method makes
any pixels of color colorindex in an image
transparent. Only one color may be transparent at a time; a second
call to transparent( )
will override the first
call, and will return pixels that were previously transparent to
their original color. To turn off transparency in an image, give
colorindex a value of -1. To find the index of
the transparent color in an image, call transparent(
)
without a parameter. To make the color that is closest
to white in an image transparent, try:
$mostestwhitest = $image->colorClosest(255,255,255); $image->transparent($whitest);
This function can be used with setBrush( )
to
create irregularly shaped brushes. See the setBrush(
)
method for an example of this.
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