ImagickDraw::setTextUnderColor

(PECL imagick 2.0.0)

ImagickDraw::setTextUnderColorSpecifies the color of a background rectangle

Description

bool ImagickDraw::setTextUnderColor ( ImagickPixel $under_color )
Warning

This function is currently not documented; only its argument list is available.

Specifies the color of a background rectangle to place under text annotations.

Parameters

under_color

the under color

Return Values

No value is returned.

Examples

Example #1 ImagickDraw::setTextUnderColor()

<?php
function setTextUnderColor($strokeColor$fillColor$backgroundColor$textUnderColor) {
    
$draw = new \ImagickDraw();

    
$draw->setStrokeColor($strokeColor);
    
$draw->setFillColor($fillColor);
    
$draw->setStrokeWidth(2);
    
$draw->setFontSize(72);
    
$draw->annotation(5075"Lorem Ipsum!");
    
$draw->setTextUnderColor($textUnderColor);
    
$draw->annotation(50175"Lorem Ipsum!");

    
$imagick = new \Imagick();
    
$imagick->newImage(500500$backgroundColor);
    
$imagick->setImageFormat("png");

    
$imagick->drawImage($draw);

    
header("Content-Type: image/png");
    echo 
$imagick->getImageBlob();
}

?>

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User Contributed Notes 1 note

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www dot query at gmail dot com
3 years ago
When wishing to print some text on a photograph and make that text sufficiently contrasting to the background image, use a 4 byte code for colour and transparency.

It is the same 4 byte code using by the parameter '-undercolor' in ImageMagick's command lime instruction 'convert'.

The first 3 bytes are the RGB colour code and the fourth byte is the transparency byte.

<?php

    $draw
= new ImagickDraw();
   
$draw->setFillColor('#ffff00');
   
$draw->setFont('Eurostile');
   
$draw->setFontSize(21);
   
$draw->setTextUnderColor('#ff000088');
   
$picin->annotateImage($draw,40,$height-10,0,"Hallo");

?>

The example code produces yellow text on a semi-transparent red background.
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