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imageistruecolor

(PHP 4 >= 4.3.2, PHP 5, PHP 7, PHP 8)

imageistruecolorFinds whether an image is a truecolor image

Descrizione

imageistruecolor(GdImage $image): bool

imageistruecolor() finds whether the image image is a truecolor image.

Elenco dei parametri

image

Una risorsa immagine, restituita da una delle funzioni di creazione immagine, come imagecreatetruecolor().

Valori restituiti

Returns true if the image is truecolor, false otherwise.

Log delle modifiche

Versione Descrizione
8.0.0 image expects a GdImage instance now; previously, a valid gd resource was expected.

Esempi

Example #1 Simple detection of true color image instances using imageistruecolor()

<?php
// $im is an image instance

// Check if image is a true color image or not
if(!imageistruecolor($im))
{
// Create a new true color image instance
$tc = imagecreatetruecolor(imagesx($im), imagesy($im));

// Copy over the pixels
imagecopy($tc, $im, 0, 0, 0, 0, imagesx($im), imagesy($im));
imagedestroy($im);

$im = $tc;
$tc = NULL;

// OR use imagepalettetotruecolor()
}

// Continue working with image instance
?>

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