(PHP 4 >= 4.0.6, PHP 5, PHP 7)
imagecopymergegray — Copy and merge part of an image with gray scale
$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.
dst_imDestination image link resource.
src_imSource image link resource.
dst_xx-coordinate of destination point.
dst_yy-coordinate of destination point.
src_xx-coordinate of source point.
src_yy-coordinate of source point.
src_wSource width.
src_hSource 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, except for
ignoring alpha components, while
it implements alpha transparency for true colour images.
Returns TRUE on success or FALSE on failure.
Example #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);
?>