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PHP ImagickDraw setStrokeAlpha()用法及代碼示例


ImagickDraw::setStrokeAlpha()函數是PHP中的內置函數,用於指定筆觸對象輪廓的不透明度。

用法:

bool ImagickDraw::setStrokeAlpha( $opacity )

參數:此函數接受單個參數不透明度,該參數用於指定筆觸對象的透明度。它是浮點值,介於0和1之間。


返回值:此函數不返回任何值。

以下示例程序旨在說明PHP中的ImagickDraw::setStrokeAlpha()函數:

示例1:

<?php 
   
// require_once('path/vendor/autoload.php'); 
   
// Create an Imagick Draw object 
$draw = new \ImagickDraw(); 
   
// Set the stroke color 
$strokeColor = new \ImagickPixel('Green'); 
   
// Set the fill color 
$fillColor = new \ImagickPixel('Red'); 
   
// Set the stroke color 
$draw->setStrokeColor('Green'); 
   
// Set the Fill Color 
$draw->setFillColor('Red'); 
   
// Set the stroke width 
$draw->setStrokeWidth(5); 
  
// Set the stroke opacity 
$draw->setStrokeOpacity(0.5); 
   
$smoothPointsSet = [ 
        [ ['x' => 10.0 * 5, 'y' => 10.0 * 5], 
          ['x' => 30.0 * 5, 'y' => 90.0 * 5], 
          ['x' => 25.0 * 5, 'y' => 10.0 * 5], 
          ['x' => 50.0 * 5, 'y' => 50.0 * 5], ] 
    ]; 
   
foreach ($smoothPointsSet as $points) { 
    $draw->bezier($points); 
} 
   
// Create an imagick object 
$imagick = new \Imagick(); 
   
// Set the image dimensions 
$imagick->newImage(300, 300, 'White'); 
   
// Set the image format 
$imagick->setImageFormat("png"); 
   
// Draw the image 
$imagick->drawImage($draw); 
header("Content-Type: image/png"); 
   
// Display the image 
echo $imagick->getImageBlob(); 
?>

輸出:

示例2:

<?php 
  
// require_once('path/vendor/autoload.php'); 
  
// Create an ImagickDraw object 
  
$draw = new \ImagickDraw(); 
  
// Set the Stroke Color  
$draw->setStrokeColor('Green'); 
  
// Set the Fill Color 
$draw->setFillColor('Red'); 
  
// Set the stroke width 
$draw->setStrokeWidth(7); 
  
// Set the stroke opacity 
$draw->setStrokeOpacity(0.5); 
  
// Draw the rectangle 
$draw->rectangle(40, 30, 200, 260); 
  
// Create an Imagick object  
$image = new \Imagick(); 
  
// Set the image dimensions 
$image->newImage(250, 300, 'White'); 
  
// Set the image format 
$image->setImageFormat("png"); 
  
// Draw the image 
$image->drawImage($draw); 
header("Content-Type: image/png"); 
  
// Display the image  
echo $image->getImageBlob(); 
?>

輸出:

參考: http://php.net/manual/en/imagickdraw.setstrokealpha.php



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注:本文由純淨天空篩選整理自sarthak_ishu11大神的英文原創作品 PHP | ImagickDraw setStrokeAlpha() 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。