GD and Image 함수 목록
PHP Manual

imagecolorresolvealpha

(PHP 4 >= 4.0.6, PHP 5)

imagecolorresolvealphaGet the index of the specified color + alpha or its closest possible alternative

설명

int imagecolorresolvealpha ( resource $image , int $red , int $green , int $blue , int $alpha )

This function is guaranteed to return a color index for a requested color, either the exact color or the closest possible alternative.

인수

image

imagecreatetruecolor() 등의 이미지 생성 함수에서 반환한 이미지 자원.

red

Value of red component.

green

Value of green component.

blue

Value of blue component.

alpha

A value between 0 and 127. 0 indicates completely opaque while 127 indicates completely transparent.

The colors parameters are integers between 0 and 255 or hexadecimals between 0x00 and 0xFF.

반환값

Returns a color index.

예제

Example #1 Using imagecoloresolvealpha() to get colors from an image

<?php
// Load an image
$im imagecreatefromgif('phplogo.gif');

// Get closest colors from the image
$colors = array();
$colors[] = imagecolorresolvealpha($im2552552550);
$colors[] = imagecolorresolvealpha($im00200127);

// Output
print_r($colors);

imagedestroy($im);
?>

위 예제의 출력 예시:

Array
(
    [0] => 89
    [1] => 85
)

주의

Note: 이 함수는 GD 2.0.1 이상이 필요합니다. (2.0.28 이상을 권장합니다)

참고


GD and Image 함수 목록
PHP Manual