GoLang imagepalettetotruecolor

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PHP imagepalettetotruecolor

PHP original manual for imagepalettetotruecolor [ show | php.net ]

imagepalettetotruecolor

(PHP 5 >= 5.5.0, PHP 7)

imagepalettetotruecolor — Converts a palette based image to true color

Description

bool imagepalettetotruecolor ( resource $src )

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

Parameters

image

An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().

Return Values

Returns TRUE if the convertion was complete, or if the source image already is a true color image, otherwise FALSE is returned.

Examples

Example #1 Converts any image resource to true color

<?php
// Backwards compatiblity
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($src));
        imagedestroy($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();

// Free the memory
imagedestroy($im);
?>

The above example will output:

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

See Also