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,$height-10,0,"Hallo");
?>
The example code produces yellow text on a semi-transparent red background.
ImagickDraw::setTextUnderColor
(PECL imagick 2, PECL imagick 3)
ImagickDraw::setTextUnderColor — Specifies the color of a background rectangle
Descrizione
Avviso
Questa funzione, al momento non è documentata; è disponibile soltanto la lista degli argomenti.
Specifies the color of a background rectangle to place under text annotations.
Elenco dei parametri
-
under_color -
the under color
Valori restituiti
Nessun valore viene restituito.
Esempi
Example #1 ImagickDraw::setTextUnderColor() example
<?php
function setTextUnderColor($strokeColor, $fillColor, $backgroundColor, $textUnderColor) {
$draw = new \ImagickDraw();
$draw->setStrokeColor($strokeColor);
$draw->setFillColor($fillColor);
$draw->setStrokeWidth(2);
$draw->setFontSize(72);
$draw->annotation(50, 75, "Lorem Ipsum!");
$draw->setTextUnderColor($textUnderColor);
$draw->annotation(50, 175, "Lorem Ipsum!");
$imagick = new \Imagick();
$imagick->newImage(500, 500, $backgroundColor);
$imagick->setImageFormat("png");
$imagick->drawImage($draw);
header("Content-Type: image/png");
echo $imagick->getImageBlob();
}
?>
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13 years ago
