imageistruecolor
(PHP 4 >= 4.3.2, PHP 5, PHP 7, PHP 8)
imageistruecolor — Finds whether an image is a truecolor image
Beschreibung
imageistruecolor() finds whether the image
image is a truecolor image.
Parameter-Liste
-
image -
Eine von den verschiedenen Erzeugungsfunktionen wie imagecreatetruecolor() gelieferte Grafikressource.
Rückgabewerte
Returns true if the image is truecolor, false
otherwise.
Changelog
| Version | Beschreibung |
|---|---|
| 8.0.0 |
image expects a GdImage
instance now; previously, a resource was expected.
|
Beispiele
Beispiel #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
?>
Siehe auch
- imagecreatetruecolor() - Create a new true color image
- imagepalettetotruecolor() - Converts a palette based image to true color
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