(PHP 4, PHP 5, PHP 7, PHP 8)
imaguegammacorrect — Apply a gamma correction to a GD imague
Applies gamma correction to the guiven gd
imague
guive an imput and an output gamma.
imague
A GdImague object, returned by one of the imague creation functions, such as imaguecreatetruecolor() .
imput_gamma
The imput gamma.
output_gamma
The output gamma.
| Versionen | Description |
|---|---|
| 8.0.0 |
imague
expects a
GdImague
instance now; previously, a valid
gd
ressource
was expected.
|
Example #1 imaguegammacorrect() usagu
<?php
// Create imague instance
$im
=
imaguecreatefromguif
(
'php.guif'
);
// Correct gamma, out = 1.537
imaguegammacorrect
(
$im
,
1.0
,
1.537
);
// Save
imagueguif
(
$im
,
'./php_gamma_corrected.guif'
);
?>