imagecolorallocate
(PHP 3, PHP 4 )
imagecolorallocate -- Allocate a color for an image
Description
int imagecolorallocate ( resource image, int red, int green,
int blue)
imagecolorallocate() returns a color identifier representing
the color composed of the given RGB components. The image
argument is the return from the imagecreate() function.
red, green and blue are the values of the red, green and
blue component of the requested color respectively. These
parameters are integers between 0 and 255 or hexadecimals
between 0x00 and 0xFF. imagecolorallocate() must be called
to create each color that is to be used in the image represented
by image.
Note: The first call to imagecolorallocate() fills the
background color.
<?php
// 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);
?>
Returns -1 if the allocation failed.
See also imagecolorallocatealpha() and imagecolordeallocate().
