(PECL imagick 2, PECL imagick 3)

Imagick::getQuantumDepthLit la profondeur quantique


public static Imagick::getQuantumDepth ( ) : array

Cette fonction est actuellement non documentée ; seule la liste des arguments est disponible.

Retourne la profondeur quantique.

Valeurs de retour

Retourne un tableau avec les membres "quantumDepthLong" et "quantumDepthString".

Erreurs / Exceptions

Lance une exception ImagickException si une erreur survient.

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User Contributed Notes 1 note

holdoffhunger at gmail dot com
8 years ago
The getQuantumDepth works much like the other "Depth" functions and much like the getQuantumRange function.  Like the Depth functions, it returns a value indicating the number of bits to store the unique color values -- 16-bit = 2^16 unique colors, which is 65,535 (counting starts at '0' in binary, as opposed to '1' in decimal).  Like the getQuantumRange function, it returns an array with two values, one being a long integer ('quantumDepthLong') and the other being a string ('quantumDepthLong').  The only difference, besides the variable types, is that the string version has a 'Q' prefixed to it.

Here's some sample code and the results, given a color, BMP file photograph that is 600x450 pixels...


// Author:
        // 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
        // ---------------------------------------------

// Get Quantum Depth
        // ---------------------------------------------
$imagick_type_quantum_depth = $imagick_type->getQuantumDepth();
// Print Results
        // ---------------------------------------------




    [quantumDepthLong] => 16
    [quantumDepthString] => Q16
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