imagepalettecopy

(PHP 4 >= 4.0.1, PHP 5)

imagepalettecopyCopy the palette from one image to another

Descrizione

void imagepalettecopy ( resource $destination , resource $source )

imagepalettecopy() copies the palette from the source image to the destination image.

Elenco dei parametri

destination

The destination image resource.

source

The source image resource.

Valori restituiti

Nessun valore viene restituito.

Esempi

Example #1 imagepalettecopy() example

<?php
// Create two palette images
$palette1 imagecreate(100100);
$palette2 imagecreate(100100);

// Allocate the background to be 
// green in the first palette image
$green imagecolorallocate($palette102550);

// Copy the palette from image 1 to image 2
imagepalettecopy($palette2$palette1);

// Since the palette is now copied we can use the 
// green color allocated to image 1 without using 
// imagecolorallocate() twice
imagefilledrectangle($palette2009999$green);

// Output image to the browser
header('Content-type: image/png');

imagepng($palette2);
imagedestroy($palette1);
imagedestroy($palette2);
?>

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User Contributed Notes 2 notes

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0
buzz at nospam dot oska dot com
9 years ago
actually it doesn't "copy" the palette exactly.  It copys the colors from the source palette to the destination image.   the palette you end up with in the destination image will be "same colors different order".   If you want an EXACT palette copy (at the expense of messing up your image if you aren't careful), then use this code:
<?
// this is a drop-in replacement for imagepalettecopy, except that it make NO attempt to modifiy any of the
// colors in the dest image, just the palette.   The result?  if you're palette's aren't very similar, the image will look completely different, and likely terrible!
function imagepalettecopy_exact ( $dst_img, $src_img) {
    for(
$c = 0 ; $c < imagecolorstotal($src_img); $c++) {
       
$col = imagecolorsforindex($src_img,$c);  //get color at index 'c' in the color table
       
imagecolorset($dst_img,$c,$col[red],$col[green],$col[blue]); //set color at index 'c' to $col in the $dst_image
   
}
}

?>
up
-1
Los Olvidados
11 years ago
To be precise, this function replaces the palette in the destination.
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