Imagick::transparentPaintImage
(PECL imagick 2 >= 2.3.0, PECL imagick 3)
Imagick::transparentPaintImage — Paints pixels transparent
Description
public Imagick::transparentPaintImage(
mixed
float
float
bool
): bool
mixed
$target,float
$alpha,float
$fuzz,bool
$invert): bool
Paints pixels matching the target color transparent. This method is available if Imagick has been compiled against ImageMagick version 6.3.8 or newer.
Parameters
-
target -
The target color to paint
-
alpha -
The level of transparency: 1.0 is fully opaque and 0.0 is fully transparent.
-
fuzz -
The amount of fuzz. For example, set fuzz to 10 and the color red at intensities of 100 and 102 respectively are now interpreted as the same color.
-
invert -
If
truepaints any pixel that does not match the target color.
Return Values
Returns true on success.
Examples
Example #1 Imagick::transparentPaintImage()
<?php
function transparentPaintImage($color, $alpha, $fuzz) {
$imagick = new \Imagick(realpath("images/BlueScreen.jpg"));
//Need to be in a format that supports transparency
$imagick->setimageformat('png');
$imagick->transparentPaintImage(
$color, $alpha, $fuzz * \Imagick::getQuantum(), false
);
//Not required, but helps tidy up left over pixels
$imagick->despeckleimage();
header("Content-Type: image/png");
echo $imagick->getImageBlob();
}
?>
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