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Imagick::exportImagePixels

(PECL imagick 2 >=2.3.0, PECL imagick 3)

Imagick::exportImagePixelsExports raw image pixels

Descrição

public Imagick::exportImagePixels(
    int $x,
    int $y,
    int $width,
    int $height,
    string $map,
    int $STORAGE
): array

Exports image pixels into an array. The map defines the ordering of the exported pixels. The size of the returned array is width * height * strlen(map). Este método estará disponível se a extensão Imagick tiver sido compilada com a ImageMagick versão 6.4.7 ou superior.

Parâmetros

x

X-coordinate of the exported area

y

Y-coordinate of the exported area

width

Width of the exported aread

height

Height of the exported area

map

Ordering of the exported pixels. For example "RGB". Valid characters for the map are R, G, B, A, O, C, Y, M, K, I and P.

STORAGE

Refer to this list of pixel type constants

Valor Retornado

Returns an array containing the pixels values.

Erros/Exceções

Lança uma exceção ImagickException em caso de erro.

Exemplos

Exemplo #1 Using Imagick::exportImagePixels()

Export image pixels into an array

<?php

/* Create new object */
$im = new Imagick();

/* Create new image */
$im->newPseudoImage(0, 0, "magick:rose");

/* Export the image pixels */
$pixels = $im->exportImagePixels(10, 10, 2, 2, "RGB", Imagick::PIXEL_CHAR);

/* Output */
var_dump($pixels);
?>

O exemplo acima produzirá:

array(12) {
  [0]=>
  int(72)
  [1]=>
  int(64)
  [2]=>
  int(57)
  [3]=>
  int(69)
  [4]=>
  int(59)
  [5]=>
  int(43)
  [6]=>
  int(124)
  [7]=>
  int(120)
  [8]=>
  int(-96)
  [9]=>
  int(91)
  [10]=>
  int(84)
  [11]=>
  int(111)
}

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User Contributed Notes 1 note

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2
P S
1 year ago
These are the letters for the map:

R = red
G = green
B = blue
A = alpha (0 is transparent)
O = alpha (0 is opaque)
C = cyan
Y = yellow
M = magenta
K = black
I = intensity (for grayscale)
P = pad
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