Imagick::getQuantumRange

(PECL imagick 2, PECL imagick 3)

Imagick::getQuantumRange — Returns the Imagick quantum range

说明

public static Imagick::getQuantumRange(): array

Returns the quantum range for the Imagick instance.

参数

此函数没有参数。

返回值

Returns an associative array containing the quantum range as an int ("quantumRangeLong") and as a string ("quantumRangeString").

错误／异常

错误时抛出 ImagickException。

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holdoffhunger at gmail dot com ¶

12 years ago

The getQuantumRange is a useful function, since many of the ImageMagick functions accept parameters from 0 to a maximum of the Quantum Range.  When getting a return value for this, it doesn't return a string.  It actually returns an array, with one type being a String ('quantumRangeLong') and the other type being a Long Int ('quantumRangeString').  Here's some sample code and the results, given a color, BMP file photograph that is 600x450 pixels...

<?php

// Author: holdoffhunger@gmail.com

        // Imagick Type
        // ---------------------------------------------

$imagick_type = new Imagick();

// Open File
        // ---------------------------------------------

$file_to_grab = "image_workshop_directory/test.bmp";

$file_handle_for_viewing_image_file = fopen($file_to_grab, 'a+');

// Grab File
        // ---------------------------------------------

$imagick_type->readImageFile($file_handle_for_viewing_image_file);

// Get Quantum Range
        // ---------------------------------------------

$imagick_type_quantum_range = $imagick_type->getQuantumRange();

// Print Results
        // ---------------------------------------------

print("<pre>");
print_r($imagick_type_quantum_range);
    print("</pre>");

?>

Output:

Array
(
    [quantumRangeLong] => 65535
    [quantumRangeString] => 65535
)

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备份地址：http://www.lvesu.com/blog/php/imagick.getquantumrange.php