imagecopymergegray

(PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8)

imagecopymergegrayCopy and merge part of an image with gray scale

Descrizione

imagecopymergegray(
    GdImage $dst_image,
    GdImage $src_image,
    int $dst_x,
    int $dst_y,
    int $src_x,
    int $src_y,
    int $src_width,
    int $src_height,
    int $pct
): bool

imagecopymergegray() copy a part of src_image onto dst_image starting at the x,y coordinates src_x, src_y with a width of src_width and a height of src_height. 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.

Elenco dei parametri

dst_image

Risorsa link dell'immagine di destinazione

src_image

Risorsa link dell'immagine originale

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_width

Larghezza dell'originale.

src_height

Altezza dell'originale.

pct

The src_image 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.

Valori restituiti

Restituisce true in caso di successo, false in caso di fallimento.

Log delle modifiche

Versione Descrizione
8.0.0 dst_image and src_image expect GdImage instances now; previously, resources were expected.

Esempi

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
header('Content-Type: image/gif');
imagegif($dest);
?>