PHP Manual: Imports image pixels

Description

public bool Imagick::importImagePixels(
    int $x,
    int $y,
    int $width,
    int $height,
    string $map,
    int $storage,
    array $pixels
)

Imports pixels from an array into an image. The map is usually 'RGB'. This method imposes the following constraints for the parameters: amount of pixels in the array must match width x height x length of the map. This method is available if Imagick has been compiled against ImageMagick version 6.4.5 or newer.

Parameters

x: The image x position
y: The image y position
width: The image width
height: The image height
map: Map of pixel ordering as a string. This can be for example RGB. The value can be any combination or order of R = red, G = green, B = blue, A = alpha (0 is transparent), O = opacity (0 is opaque), C = cyan, Y = yellow, M = magenta, K = black, I = intensity (for grayscale), P = pad.
storage: The pixel storage method. Refer to this list of pixel constants.
pixels: The array of pixels

Return Values

Returns true on success.

Errors/Exceptions

Throws ImagickException on error.

Examples

Example #1 Imagick::importImagePixels example

<?php

/* Generate array of pixels. 2000 pixels per color stripe */
$count = 2000 * 3;

$pixels = 
   array_merge(array_pad(array(), $count, 0),
               array_pad(array(), $count, 255), 
               array_pad(array(), $count, 0),
               array_pad(array(), $count, 255),
               array_pad(array(), $count, 0));

/* Width and height. The area is amount of pixels divided
   by three. Three comes from 'RGB', three values per pixel */
$width = $height = pow((count($pixels) / 3), 0.5);

/* Create empty image */
$im = new Imagick();
$im->newImage($width, $height, 'gray');

/* Import the pixels into image.
   width * height * strlen("RGB") must match count($pixels) */
$im->importImagePixels(0, 0, $width, $height, "RGB", Imagick::PIXEL_CHAR, $pixels);

/* output as jpeg image */
$im->setImageFormat('jpg');
header("Content-Type: image/jpg");
echo $im;

?>

The above example will output something similar to:

Output of example : Imagick::importImagePixels()