PHP | ImagickDraw setFillAlpha() Function

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The ImagickDraw::setFillAlpha() function is an inbuilt function in PHP which is used to set the opacity to use when drawing using the fill color or fill texture.

Syntax:

bool ImagickDraw::setFillAlpha( float $opacity )

Parameters: This function accepts a single parameter $opacity which holds the opacity of the color where 1 means opaque and 0 means transparent.

Return Value: This function returns TRUE on success.

Exceptions: This function throws ImagickException on error.

Below given programs illustrate the ImagickDraw::setFillAlpha() function in PHP:

Program 1:

<?php 
  
// Create a new imagick object 
$imagick = new Imagick(); 
  
// Create a image on imagick object 
$imagick->newImage(800, 250, 'white'); 
  
// Create a new imagickDraw object 
$draw = new ImagickDraw(); 
  
// Set the color to green 
$draw->setFillColor('green'); 
  
// Set the opacity 
$draw->setFillAlpha(0.3); 
  
// Set the font size 
$draw->setFontSize(80); 
  
// Annotate a text 
$draw->annotation(100, 150, 'zambiatek'); 
  
// Render the draw commands 
$imagick->drawImage($draw); 
  
// Show the output 
$imagick->setImageFormat('png'); 
header("Content-Type: image/png"); 
echo $imagick->getImageBlob(); 
?> 

Output:

Program 2:

<?php 
  
// Create a new imagick object 
$imagick = new Imagick(); 
  
// Create a image on imagick object 
$imagick->newImage(800, 250, 'white'); 
  
// Create a new imagickDraw object 
$draw = new ImagickDraw(); 
  
// Set the color to green 
$draw->setFillColor('green'); 
  
// Set the opacity 
$draw->setFillAlpha(0.3); 
  
// Draw a circle 
$draw->circle(300, 200, 230, 20); 
  
// Set the color to red 
$draw->setFillColor('red'); 
  
// Set the opacity 
$draw->setFillAlpha(0.5); 
  
// Draw a rectangle 
$draw->rectangle(200, 300, 20, 100); 
  
// Render the draw commands 
$imagick->drawImage($draw); 
  
// Show the output 
$imagick->setImageFormat('png'); 
header("Content-Type: image/png"); 
echo $imagick->getImageBlob(); 
?> 