ImagickDraw::annotation

(PECL imagick 2, PECL imagick 3)

ImagickDraw::annotationDesenha texto na imagem

Descrição

public ImagickDraw::annotation(float $x, float $y, string $text): bool
Aviso

Esta função não está documentada; apenas a lista de argumentos está disponível.

Desenha texto na imagem.

Parâmetros

x

A coodernada x onde o texto vai ser desenhado

y

A coodernada y onde o texto vai ser desenhado

text

O texto para desenhar na imagem

Valor Retornado

Nenhum valor é retornado.

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User Contributed Notes 5 notes

up
15
use_contact_form at Jonas-Kress dot de
15 years ago
may help someone...

<?php
/**
* Split the given text into rows fitting the given maxWidth
*
* @param unknown_type $draw
* @param unknown_type $text
* @param unknown_type $maxWidth
* @return array
*/
private function getTextRows($draw, $text, $maxWidth)
{
$words = explode(" ", $text);

$lines = array();
$i=0;
while (
$i < count($words))
{
//as long as there are words

$line = "";
do
{
//append words to line until the fit in size
if($line != ""){
$line .= " ";
}
$line .= $words[$i];


$i++;
if((
$i) == count($words)){
break;
//last word -> break
}

//messure size of line + next word
$linePreview = $line." ".$words[$i];
$metrics = $this->canvas->queryFontMetrics($draw, $linePreview);
//echo $line."($i)".$metrics["textWidth"].":".$maxWidth."<br>";

}while($metrics["textWidth"] <= $maxWidth);

//echo "<hr>".$line."<br>";
$lines[] = $line;
}

//var_export($lines);
return $lines;
}
?>
up
9
Anonymous
14 years ago
Here's how to create a header image and write it to file. This took me a while to figure out. I hope this helps.

<?php

/* Text to write */
$text = "Hello World!";

/* Create Imagick objects */
$image = new Imagick();
$draw = new ImagickDraw();
$color = new ImagickPixel('#000000');
$background = new ImagickPixel('none'); // Transparent

/* Font properties */
$draw->setFont('Arial');
$draw->setFontSize(50);
$draw->setFillColor($color);
$draw->setStrokeAntialias(true);
$draw->setTextAntialias(true);

/* Get font metrics */
$metrics = $image->queryFontMetrics($draw, $text);

/* Create text */
$draw->annotation(0, $metrics['ascender'], $text);

/* Create image */
$image->newImage($metrics['textWidth'], $metrics['textHeight'], $background);
$image->setImageFormat('png');
$image->drawImage($draw);

/* Save image */
file_put_contents('/path/to/file.png', $image);
?>
up
0
daniel at justathought dot net
1 month ago
[As mentioned in another comment] To correctly position text in the vertical plane when using `annotation()`, you can use the value of the `"ascender"` element returned by `Imagick::queryFontMetrics()`.

So, to effectively make your text touch [0, 0], for example, you could do something like the following.

<?php
$textDraw
= new ImagickDraw();
$textDraw->setFont($fontPathname);
$textDraw->setFontSize($fontSize);
$textDraw->setFillColor(new ImagickPixel($color));

$imagick= new Imagick();
$textMetrics = $imagick->queryFontMetrics($textDraw, 'Hello, World!');

$textDraw->annotation(
0,
$textMetrics['ascender'], // <-- This is the important bit :-)
'Hello, World!'
);
?>

Hope that helps clarify. The other comment was a blessing for me.
up
-1
Anonymous
15 years ago
You can use this method to break your text so that it'll fit a certain $maxWidth.

<?php
/**
* @param string $text
* @param int $maxWidth
*/
protected function _fitText($text, $maxWidth)
{
$im = new Imagick();
$im->newImage($this->_width, $this->_height, "none");

$lines = explode(PHP_EOL, trim($text));
$DEBUG_LOOP = 0;

for (
$k = 0; $k < count($lines); ++$k) {
do {
$drawText = new ImagickDraw();
// set your font settings like size, family, .. here
$metrics = $im->queryFontMetrics($drawText, $lines[$k]);
$fits = $metrics["textWidth"] <= $maxWidth;

if (
$fits) {
break;
}

$pos = mb_strrpos($lines[$k], " ");
if (
$pos === false) {
throw new
RuntimeException("can not make it fit");
}
if (!isset(
$lines[$k + 1])) {
$lines[$k + 1] = null;
}
$lines[$k + 1] = trim(mb_substr($lines[$k], $pos + 1) . " " . $lines[$k + 1]);
$lines[$k] = trim(mb_substr($lines[$k], 0, $pos));

if (++
$DEBUG_LOOP >= 200) {
throw new
RuntimeException("infinite loop");
}
} while (!
$fits);
}
$text = implode(PHP_EOL, $lines);
$drawText = new ImagickDraw();
// set your font settings like size, family, .. here again!
$metrics = $im->queryFontMetrics($drawText, $text);
$metrics["text"] = $text;
assert('$metrics["textWidth"] <= $maxWidth');
return
$metrics;
}
?>
up
-1
web at synaptech dot fr
10 years ago
In some cases the (custom) font can be truncated on the side parts, especially the handwritten ones.
To improve the above note from Anonymous on "how to create a header image", I've changed this part of the code:

<?php
/* Create text */
$draw->annotation( $metrics['boundingBox']['y2'], $metrics['ascender'], $text );

/* Create image */
$image->newImage( $metrics['textWidth'] + $metrics['boundingBox']['y2'], $metrics['textHeight'], $background );
?>
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