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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User Contributed Notes 1 note
holdoffhunger at gmail dot com ¶
10 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
)
备份地址：http://www.lvesu.com/blog/php/imagick.getquantumrange.php