Copy and merge part of an image with gray scale

Beschreibung

bool imagecopymergegray ( resource $dst_im , resource $src_im , int $dst_x , int $dst_y , int $src_x , int $src_y , int $src_w , int $src_h , int $pct )

imagecopymergegray() copy a part of src_im onto dst_im starting at the x,y coordinates src_x , src_y with a width of src_w and a height of src_h . The portion defined will be copied onto the x,y coordinates, dst_x and dst_y .

This function is identical to imagecopymerge() except that when merging it preserves the hue of the source by converting the destination pixels to gray scale before the copy operation.

Parameter-Liste

dst_im: Destination image link resource.
src_im: Source image link resource.
dst_x: x-coordinate of destination point.
dst_y: y-coordinate of destination point.
src_x: x-coordinate of source point.
src_y: y-coordinate of source point.
src_w: Source width.
src_h: Source height.
pct: The src_im will be changed to grayscale according to pct where 0 is fully grayscale and 100 is unchanged. When pct = 100 this function behaves identically to imagecopy() for pallete images, while it implements alpha transparency for true colour images.

Rückgabewerte

Gibt bei Erfolg TRUE zurück, im Fehlerfall FALSE.

Beispiele

Beispiel #1 imagecopymergegray() usage


<?php
// Create image instances
$dest = imagecreatefromgif('php.gif');
$src = imagecreatefromgif('php.gif');

// Copy and merge - Gray = 20%
imagecopymergegray($dest, $src, 10, 10, 0, 0, 100, 47, 20);

// Output and free from memory
header('Content-Type: image/gif');
imagegif($dest);

imagedestroy($dest);
imagedestroy($src);
?>