Imagick::getImageType

(PECL imagick 2, PECL imagick 3)

Imagick::getImageType — Gets the potential image type

说明

public Imagick::getImageType ( ) : int

Gets the potential image type.

参数

此函数没有参数。

返回值

Returns the potential image type.

  • imagick::IMGTYPE_UNDEFINED
  • imagick::IMGTYPE_BILEVEL
  • imagick::IMGTYPE_GRAYSCALE
  • imagick::IMGTYPE_GRAYSCALEMATTE
  • imagick::IMGTYPE_PALETTE
  • imagick::IMGTYPE_PALETTEMATTE
  • imagick::IMGTYPE_TRUECOLOR
  • imagick::IMGTYPE_TRUECOLORMATTE
  • imagick::IMGTYPE_COLORSEPARATION
  • imagick::IMGTYPE_COLORSEPARATIONMATTE
  • imagick::IMGTYPE_OPTIMIZE

错误／异常

错误时抛出 ImagickException。

User Contributed Notes

holdoffhunger at gmail dot com 21-May-2012 11:18
This function will return an integer, with that value being equal to the evaluated value of the IMGType Constants as defined by the ImageMagick class.  When accessing them, they look like "imagick::IMGTYPE_PALETTE", but with "_VALUE" values of: undefined, bilevel, grayscale, grayscalematte, palette, palettematte, truecolor, truecolormatte, colorseparation, colorseparationmatte, and optimize.  If you were to print out these values, you would have '0' for undefined, '1' for bilevel, '2' for grayscale, and so on.

For a BMP picture drawn in paint, I got back the value # 4 - Palette.  For a BMP or JPEG photograph of the ocean or jungle, I got back the value # 6 - Truecolor.  For an animated GIF file, I got back the value # 5 - Palette Matte.  For a black-and-white JPEG drawing, I got back the value # 2 - Grayscale.  These are the most common results I have gotten back with this function.

Some sample code :

<?php

            // Author: [email protected]
   
        // 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 Image Type Value
        // ---------------------------------------------
       
    $image_type = $imagick_type->getImageType();
   
        // Interpret Image Type Value
        // ---------------------------------------------

    switch($image_type)
    {
        case imagick::IMGTYPE_UNDEFINED:
            $image_type_title = "Undefined";
            break;
           
        case imagick::IMGTYPE_BILEVEL:
            $image_type_title = "Bilevel";
            break;
           
        case imagick::IMGTYPE_GRAYSCALE:
            $image_type_title = "Grayscale";
            break;
           
        case imagick::IMGTYPE_GRAYSCALEMATTE:
            $image_type_title = "Grayscale Matte";
            break;
           
        case imagick::IMGTYPE_PALETTE:
            $image_type_title = "Palette";
            break;
           
        case imagick::IMGTYPE_PALETTEMATTE:
            $image_type_title = "Palette Matte";
            break;
           
        case imagick::IMGTYPE_TRUECOLOR:
            $image_type_title = "Truecolor";
            break;
           
        case imagick::IMGTYPE_TRUECOLORMATTE:
            $image_type_title = "Truecolor Matte";
            break;
           
        case imagick::IMGTYPE_COLORSEPARATION:
            $image_type_title = "Color Separation";
            break;
           
        case imagick::IMGTYPE_COLORSEPARATIONMATTE:
            $image_type_title = "Color Separation Matte";
            break;
           
        case imagick::IMGTYPE_OPTIMIZE:
            $image_type_title = "Optimize";
            break;
    }
   
        // Print Image Type Value
        // ---------------------------------------------
       
    print("# $image_type - $image_type_title");

?>
lukeydeluxe at gmail dot com 15-Jan-2009 04:13
Remember, the result, if successful, is an Array, wich means you should call for example "$var[format]" if you want to know what format the file uses.