Set the color for the specified palette index

설명

void imagecolorset ( resource $image , int $index , int $red , int $green , int $blue )

This sets the specified index in the palette to the specified color. This is useful for creating flood-fill-like effects in palleted images without the overhead of performing the actual flood-fill.

인수

image: imagecreatetruecolor() 등의 이미지 생성 함수에서 반환한 이미지 자원.
index: An index in the palette.
red: Value of red component.
green: Value of green component.
blue: Value of blue component.

반환값

값을 반환하지 않습니다.

예제

Example #1 imagecolorset() example


<?php
// Create a 300x100 image
$im = imagecreate(300, 100);

// Set the background to be red
imagecolorallocate($im, 255, 0, 0);

// Get the color index for the background
$bg = imagecolorat($im, 0, 0);

// Set the backgrund to be blue
imagecolorset($im, $bg, 0, 0, 255);

// Output the image to the browser
//header('Content-type: image/png');

imagepng($im);
imagedestroy($im);
?>

참고

imagecolorat() - Get the index of the color of a pixel