CakeFest 2024: The Official CakePHP Conference

ImagickDraw::annotation

(PECL imagick 2, PECL imagick 3)

ImagickDraw::annotationРисует текст на картинке

Описание

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

Функцию пока не задокументировали; для знакомства доступен только список аргументов.

Рисует текст на картинке.

Список параметров

x

Координата X, где рисуется текст

y

Координата Y, где рисуется текст

text

Текст для рисования на изображении

Возвращаемые значения

Функция не возвращает значения после выполнения.

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User Contributed Notes 4 notes

up
15
use_contact_form at Jonas-Kress dot de
14 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
8
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
-1
Anonymous
14 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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