PHP imagecopymergegray() Function
The imagecopymergegray() function is an inbuilt function in PHP that is used to copy and merge the part of an image with a grayscale. This function copies the part of the source image into the destination image. This function returns true on success or false on failure.
Syntax:
bool imagecopymergegray ( $dst_image, $src_image, $dst_x, $dst_y, $src_x, $src_y,
$src_w, $src_h, $pct )
parameters: This function accepts nine parameters as mentioned above and described below:
- $dst_image: This parameter is used to set the destination image link resource.
- $src_image: This parameter is used to set the source image link resource.
- $dst_x: This parameter is used to set the x-coordinate of the destination point.
- $dst_y: This parameter is used to set the y-coordinate of the destination point.
- $src_x: This parameter is used to set the x-coordinate of the source point.
- $src_y: This parameter is used to set the x-coordinate of the source point.
- $src_w: This parameter is used to set source width.
- $src_h: This parameter is used to set source height.
- $pct: This parameter is used to change the grayscale according to $pct. The range of $pct is 0 to 100 where 0 is fully grayscale and 100 is unchanged. If $pct = 0, then no action is taken, and when $pct = 100 then this function behaves similarly to imagecopy() function for palette images, except ignoring the alpha components. It implements alpha transparency for true color images.
Return Value: This function returns true on success or false on failure. The below programs illustrate the imagecopymergegray() function in PHP.
Program 1:
php
<?php
$dest = imagecreatefromgif(
$src = imagecreatefromgif(
imagecopymergegray( $dest , $src , 10, 10, 0, 0, 700, 200, 75);
header( 'Content-Type: image/gif' );
imagegif( $dest );
imagedestroy( $dest );
imagedestroy( $src );
?>
|
Output:
Program 2:
php
<?php
$dest = imagecreatefrompng(
$src = imagecreatefrompng(
imagecopymergegray( $dest , $src , 10, 10, 0, 0, 700, 200, 75);
header( 'Content-Type: image/png' );
imagegif( $dest );
imagedestroy( $dest );
imagedestroy( $src );
?>
|
Output:
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Reference: http://php.net/manual/en/function.imagecopymergegray.php
Last Updated :
11 May, 2023
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