ImagickDraw::setFontSize()

(PECL imagick 2.0.0)

Sets the font pointsize to use when annotating with text

说明

ImagickDraw::setFontSize(float $pointsize): bool

Warning

本函数还未编写文档，仅有参数列表。

Sets the font pointsize to use when annotating with text.

参数

$pointsize

the point size

返回值

没有返回值。

范例

Example #1 ImagickDraw::setFontSize()

<?php
function setFontSize($fillColor, $strokeColor, $backgroundColor) {
    $draw = new \ImagickDraw();
    $draw->setStrokeOpacity(1);
    $draw->setStrokeColor($strokeColor);
    $draw->setFillColor($fillColor);
    $draw->setStrokeWidth(2);
    $draw->setFont("../fonts/Arial.ttf");
    $sizes = [24, 36, 48, 60, 72];
    foreach ($sizes as $size) {
        $draw->setFontSize($size);
        $draw->annotation(50, ($size * $size / 16), "Lorem Ipsum!");
    }
    $imagick = new \Imagick();
    $imagick->newImage(500, 500, $backgroundColor);
    $imagick->setImageFormat("png");
    $imagick->drawImage($draw);
    header("Content-Type: image/png");
    echo $imagick->getImageBlob();
}
?>

The font size taken in parameter is not the size in point (1 point = 1/72 inch) but the font's height in pixel. 
Therefore you should do a conversion to have the correct font size if you want to modify a document destined to print.
For example, if your document's resolution is 300ppi, you should add a 25/6 multiplying factor to your fontsize in order to have a correct behaviour of the font.

<?php
$sourceFile='in.jpg';
$textWrite='God is Great';
$x=50;
$y=50;  
$fontColor='#000000';
$fontSize=34;
 
$colorPix=new ImagickPixel ($fontColor);
$image=new Imagick ($sourceFile);
$draw=new ImagickDraw();
    
$draw->setFontSize($fontSize);//Sets the font pointsize to use when annotating with text
$draw->setFillColor($colorPix);//Sets the fill color to be used for drawing filled objects
      
$image->annotateImage($draw,$x,$y,0,$textWrite);//Annotates an image with text
$image->writeImage('out.jpg');//Writes an image to the specified filename
?>