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PHP Gmagick getimageresolution()用法及代碼示例


Gmagick::getimageresolution()函數是PHP中的內置函數,用於獲取圖像對象的分辨率。

用法:

array Gmagick::getimageresolution( void )

參數:該函數不接受任何參數。


返回值:此函數以數組形式返回分辨率。

以下示例程序旨在說明PHP中的Gmagick::getimageresolution()函數:

原始圖片1:
https://media.geeksforgeeks.org/wp-content/uploads/geeks-21.png

示例1:

<?php 
   
// Create an Gmagick image object 
$gmagick = new Gmagick( 
'https://media.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-15.png'); 
   
// Getting Resolution of created image 
// using getimageresolution function 
$res = $gmagick->getimageresolution(); 
echo "X = ".$res['x'] . "</br>"; 
echo "Y = ".$res['y'] ." </br>"; 
?>

輸出:

X = 37.8
Y = 37.8

原始圖片2:
https://media.geeksforgeeks.org/wp-content/uploads/Screenshot-from-2018-10-16-23-23-54.png

示例2:

<?php  
  
$string = "Computer Science portal for Geeks!";  
     
// Creating new image of above String  
// and add color and background  
$im = new Gmagick();  
$draw = new GmagickDraw();  
    
// Fill the color in image  
$draw->setFillColor(new GmagickPixel('green'));  
    
// Set the text font size  
$draw->setFontSize(50);  
    
$metrix = $im->queryFontMetrics($draw, $string);  
$draw->annotation(0, 40, $string);  
$im->newImage($metrix['textWidth'], $metrix['textHeight'],  
         new GmagickPixel('white'));  
             
// Draw the image           
$im->drawImage($draw);  
$im->setImageResolution(50, 50);  
  
// getting Resolution of created image 
// using getimageresolution function 
$res = $im->getimageresolution(); 
echo "X = ".$res['x'] . "</br>"; 
echo "Y = ".$res['y'] ." </br>"; 
?> 

輸出:

X = 50
Y = 50 

參考: http://php.net/manual/en/gmagick.getimageresolution.php



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注:本文由純淨天空篩選整理自R_Raj大神的英文原創作品 PHP | Gmagick getimageresolution() Function。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。