Imagick::annotateImage

(PECL imagick 2, PECL imagick 3)

Imagick::annotateImageAnnote une image avec un texte

Description

public Imagick::annotateImage(
    ImagickDraw $draw_settings,
    float $x,
    float $y,
    float $angle,
    string $text
): bool

Annote une image avec un texte.

Liste de paramètres

draw_settings

L'objet ImagickDraw qui contient les directives pour dessiner le texte

x

La position horizontale du texte, en pixel depuis la gauche du texte

y

La position verticale du texte, en pixel depuis la ligne de base du texte

angle

L'angle auquel écrire le texte

text

La chaîne à dessiner

Valeurs de retour

Retourne true en cas de succès.

Exemples

Exemple #1 Exemple avec Imagick::annotateImage()

Annote un texte dans une image vide

<?php
/* Création de quelques objets */
$image = new Imagick();
$draw = new ImagickDraw();
$pixel = new ImagickPixel( 'gray' );

/* Nouvelle image */
$image->newImage(800, 75, $pixel);

/* Texte noir */
$pixel->setFillColor('black');

/* Propriétées du texte */
$draw->setFont('Bookman-DemiItalic');
$draw->setFontSize( 30 );

/* Création du texte */
$image->annotateImage($draw, 10, 45, 0, 'The quick brown fox jumps over the lazy dog');

/* Format de l'image */
$image->setImageFormat('png');

/* Affichage de l'image avec les entêtes */
header('Content-type: image/png');
echo
$image;

?>

Voir aussi

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User Contributed Notes 3 notes

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9
alan at ridersite dot org
16 years ago
If ImagickDraw::setGravity ( int $gravity ) has been set, e,g; with $gravity= imagick::GRAVITY_CENTER.

Then, the x and y values offset the text from where the gravity setting would have placed it.

If the example included: $draw->setGravity (Imagick::GRAVITY_CENTER);
$image->annotateImage($draw, 10, 45, 0, 'The quick brown fox jumps over the lazy dog');

The text would be rendered to the right 10px and down 45px from the center. 

Gravity constants are very useful as they can save having to calculate the placement of variable text strings and font sizes.
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2
www dot query at gmail dot com
12 years ago
$image->annotateImage($draw, 10, 45, 0, 'The quick brown fox');

If the third parameter, the 'Y' value, is 0, the text will be invisible because the text is printed ABOVE the image - not on the image. 

The solution is to start, depending on your chosen font size, with a Y value of about 40 and experiment.

[Also:]

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
   $picin
= new Imagick($pic1);
  
$picin->scaleimage(800,0);
  
$height = $picin->getimageheight();

  
$draw = new ImagickDraw();
  
$draw->setFillColor('#ffff00');
  
$draw->setFont('Eurostile');
  
$draw->setFontSize(21);
  
$draw->setTextUnderColor('#ff000088');
  
$picin->annotateImage($draw,40,$height-10,0,"Hallo");

  
$picin->writeimage($pic6);
?>

The example code produces yellow text on a semi-transparent red background.

$pic1 and $pic6 were previously defined as directory/file strings.
up
1
yakuza88 at op dot pl
7 years ago
Does not work with CMYK color values and images. Only RGB.
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