imageistruecolor
(PHP 4 >= 4.3.2, PHP 5, PHP 7, PHP 8)
imageistruecolor — Finds whether an image is a truecolor image
Descrizione
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
?>Vedere anche:
- imagecreatetruecolor() - Create a new true color image
- imagepalettetotruecolor() - Converts a palette based image to true color
add a note
User Contributed Notes
There are no user contributed notes for this page.
