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imagepalettetotruecolor

PHP function Edit on GitHub ✎

(PHP 5 >= 5.5.0, PHP 7, PHP 8)

Converts a palette based image to true color

Description

imagepalettetotruecolor(GdImage $image): bool

Converts a palette based image, created by functions like imagecreate() to a true color image, like imagecreatetruecolor().

Parameters

Return Values

Returns true if the conversion was complete, or if the source image already is a true color image, otherwise false is returned.

Changelog

Version	Description

Examples

Converts any image object to true color

php

<?php
// Backwards compatibility
if(!function_exists('imagepalettetotruecolor'))
{
    function imagepalettetotruecolor(&$src)
    {
        if(imageistruecolor($src))
        {
            return(true);
        }

        $dst = imagecreatetruecolor(imagesx($src), imagesy($src));

        imagecopy($dst, $src, 0, 0, 0, 0, imagesx($src), imagesy($src));

        $src = $dst;

        return(true);
    }
}

// Helper closure
$typeof = function() use($im)
{
    echo 'typeof($im) = ' . (imageistruecolor($im) ? 'true color' : 'palette'), PHP_EOL;
};

// Create a palette based image
$im = imagecreate(100, 100);
$typeof();

// Convert it to true color
imagepalettetotruecolor($im);
$typeof();
?>

The above example will output:

output

typeof($im) = palette
typeof($im) = true color