imagepalettetotruecolor

(PHP 5 >= 5.5.0, PHP 7)

imagepalettetotruecolor — Converts a palette based image to true color

Descrição

bool imagepalettetotruecolor ( resource $src )

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

Parâmetros

image

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

Valor Retornado

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

Exemplos

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);
?>

O exemplo acima irá imprimir:

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

Veja Também