imagecolorallocate
(PHP 4, PHP 5)
imagecolorallocate — Allocate a color for an image
Descrizione
int imagecolorallocate
( resource $image
, int $red
, int $green
, int $blue
)
Returns a color identifier representing the color composed of the given RGB components.
imagecolorallocate() must be called to create each color that is to be used in the image represented by image .
Nota: The first call to imagecolorallocate() fills the background color in palette-based images - images created using imagecreate().
Elenco dei parametri
- image
-
Una risorsa immagine, restituita da una delle funzioni di creazione immagine, come imagecreatetruecolor().
- red
-
Value of red component
- green
-
Value of green component
- blue
-
Value of blue component
Valori restituiti
A color identifier or FALSE if the allocation failed.
Log delle modifiche
| Versione | Descrizione |
|---|---|
| Prior to 5.1.3 | Returns -1 if the allocation failed. |
Esempi
Example#1 imagecolorallocate() example
<?php
$im = imagecreate(100, 100);
// sets background to red
$background = imagecolorallocate($im, 255, 0, 0);
// sets some colors
$white = imagecolorallocate($im, 255, 255, 255);
$black = imagecolorallocate($im, 0, 0, 0);
// hexadecimal way
$white = imagecolorallocate($im, 0xFF, 0xFF, 0xFF);
$black = imagecolorallocate($im, 0x00, 0x00, 0x00);
?>