ImagickDraw::annotation

    (PECL imagick 2, PECL imagick 3)

    ImagickDraw::annotation — Draws text on the image

    说明

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

    本函数还未编写文档，仅有参数列表。

    Draws text on the image.

    参数

    x

    The x coordinate where text is drawn

    y

    The y coordinate where text is drawn

    text

    The text to draw on the image

    返回值

    没有返回值。

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    用户贡献的备注 5 notes

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    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
    15 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
    4 months 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
    11 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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