mirror of
https://github.com/sigmasternchen/php-doc-en
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31c6c7a44c
- (Created missing setup sections in setup.xml, if any) - Moved the intro to book.xml - NOTE: Moved the about section to the intro, too - Changed the intro ID from <extname>.intro to intro.<extname> - Moved the constants entity to book.xml - Changed constants.xml to be an appendix - Created an example chapter (examples.xml) NOTE: The chapter ID is imagick.examples, the first example is imagick.examples-1 NOTE: Removed reference.xml (no longer needed) git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@248849 c90b9560-bf6c-de11-be94-00142212c4b1
118 lines
3.2 KiB
XML
118 lines
3.2 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision: 1.2 $ -->
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<chapter xml:id="imagick.examples" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
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&reftitle.examples;
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<section xml:id="imagick.examples-1">
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&reftitle.examples;
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<para>
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Imagick makes image manipulation in PHP extremely easy through an OO
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interface. Here is a quick example on how to make a thumbnail:
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<example>
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<title>Creating a thumbnail in Imagick</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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header('Content-type: image/jpeg');
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$image = new Imagick('image.jpg');
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// If 0 is provided as a width or height parameter,
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// aspect ratio is maintained
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$image->thumbnailImage(100, 0);
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echo $image;
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?>
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]]>
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</programlisting>
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</example>
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</para>
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<para>
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Using SPL and other OO features supported in Imagick, it can be simple
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to resize all files in a directory (useful for batch resizing large
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digital camera images to be web viewable). Here we use resize, as we might
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want to retain certain meta-data:
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<example>
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<title>Make a thumbnail of all JPG files in a directory</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$images = new Imagick(glob('images/*.JPG'));
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foreach($images as $image) {
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// Providing 0 forces thumbnailImage to maintain aspect ratio
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$image->thumbnailImage(1024,0);
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}
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$images->writeImages();
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?>
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]]>
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</programlisting>
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</example>
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</para>
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<para>
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This is an example of creating a reflection of an image.
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The reflection is created by flipping the image and overlaying a gradient on it.
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Then both, the original image and the reflection is overlayed on a canvas.
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<example>
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<title>Creating a reflection of an image</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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/* Read the image */
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$im = new Imagick("test.png");
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/* Thumbnail the image */
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$im->thumbnailImage(200, null);
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/* Create a border for the image */
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$im->borderImage(new ImagickPixel("white"), 5, 5);
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/* Clone the image and flip it */
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$reflection = $im->clone();
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$reflection->flipImage();
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/* Create gradient. It will be overlayd on the reflection */
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$gradient = new Imagick();
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/* Gradient needs to be large enough for the image and the borders */
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$gradient->newPseudoImage($reflection->getImageWidth() + 10, $reflection->getImageHeight() + 10, "gradient:transparent-black");
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/* Composite the gradient on the reflection */
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$reflection->compositeImage($gradient, imagick::COMPOSITE_OVER, 0, 0);
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/* Add some opacity. Requires ImageMagick 6.2.9 or later */
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$reflection->setImageOpacity( 0.3 );
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/* Create an empty canvas */
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$canvas = new Imagick();
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/* Canvas needs to be large enough to hold the both images */
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$width = $im->getImageWidth() + 40;
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$height = ($im->getImageHeight() * 2) + 30;
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$canvas->newImage($width, $height, new ImagickPixel("black"));
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$canvas->setImageFormat("png");
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/* Composite the original image and the reflection on the canvas */
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$canvas->compositeImage($im, imagick::COMPOSITE_OVER, 20, 10);
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$canvas->compositeImage($reflection, imagick::COMPOSITE_OVER, 20, $im->getImageHeight() + 10);
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/* Output the image*/
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header("Content-Type: image/png");
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echo $canvas;
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?>
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]]>
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</programlisting>
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</example>
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</para>
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</section>
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</chapter>
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