first import
This commit is contained in:
Bachir Soussi Chiadmi
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name = Imagecache Autorotate
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description = Autorotate image based on EXIF Orientation.
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package = Media
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core = 7.x
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dependencies[] = image
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files[] = imagecache_autorotate.install
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files[] = imagecache_autorotate.module
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; Information added by drupal.org packaging script on 2012-12-04
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version = "7.x-1.1"
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core = "7.x"
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project = "imagecache_actions"
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datestamp = "1354653754"
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@@ -0,0 +1,13 @@
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<?php
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/**
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* @file (un)install and (dis/en)able hooks for imagecache autorotate module.
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*/
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/**
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* Implements hook_enable().
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*/
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function imagecache_autorotate_enable() {
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if (!function_exists('exif_read_data')) {
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drupal_set_message(t('The exif_read_data() function is not available in this PHP installation. You probably will have to enable the exif extension.'), 'warning');
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}
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}
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@@ -0,0 +1,148 @@
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<?php
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/**
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* @file
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* Autorotate image based on EXIF Orientation tag.
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* http://sylvana.net/jpegcrop/exif_orientation.html
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*
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* This mini-module contributed by jonathan_hunt http://drupal.org/user/28976
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* September 1, 2009
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*
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* Tweaked by dman to add documentation
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*/
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/* In Adobe PNGs and TIFF, this information MAY be present in the XMP
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* metadata like so:
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<x:xmpmeta xmlns:x="adobe:ns:meta/">
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<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
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<rdf:Description rdf:about="" xmlns:tiff="http://ns.adobe.com/tiff/1.0/">
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<tiff:Orientation>6</tiff:Orientation>
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</rdf:Description>
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</rdf:RDF>
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</x:xmpmeta>
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*/
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function imagecache_autorotate_image_effect_info() {
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$effects = array();
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$effects['imagecache_autorotate'] = array(
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'label' => t('Autorotate'),
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'help' => t('Add autorotate image based on EXIF Orientation.'),
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'effect callback' => 'imagecache_autorotate_image',
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'dimensions callback' => 'imagecache_autorotate_dimensions',
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);
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return $effects;
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}
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/**
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* @todo: This form is no longer needed nor defined in the hook above. If this
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* information still needs to be displayed it should probably be moved to help.
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*/
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function imagecache_autorotate_form() {
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$form = array();
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$form['help'] = array(
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'#type' => 'markup',
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'#value' => "<p>
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<b>There are no user-configurable options for this process.</b>
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</p><p>
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Certain cameras can embed <em>orientation</em> information into image
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files when they save them. This information is embedded in an EXIF tag
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and can be used to rotate images to their correct position for display.
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</p><p>
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<em>Not all cameras or images contain this information.</em>
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This process is only useful for those that do.
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</p><p>
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The expected/supported values are
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<br/><strong>Tag</strong>: <code>0x0112 Orientation</code>
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</p>
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<ul>
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<li>1 = Horizontal (normal)</li>
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<li>3 = Rotate 180</li>
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<li>6 = Rotate 90 CW</li>
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<li>8 = Rotate 270 CW</li>
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</ul>
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<p>
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<a href='http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/EXIF.html'>
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EXIF Reference</a>
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</p>
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",
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);
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return $form;
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}
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/**
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* Autorotate image based on EXIF Orientation tag.
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*
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* See code at
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* http://sylvana.net/jpegcrop/exif_orientation.html
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*
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* and reference at
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* http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/EXIF.html
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*
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* @todo:
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* Add horizontal and vertical flips etc.
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* Need to create sample set for tests.
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*/
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function imagecache_autorotate_image($image, $data) {
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// Test to see if EXIF is supported for image type (e.g. not PNG).
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if ($image->info['mime_type'] == 'image/jpeg') {
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if (!function_exists('exif_read_data')) {
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watchdog('image', 'The image %file could not be auto-rotated because the exif_read_data() function is not available in this PHP installation. You probably will have to enable the exif extension.', array('%file' => $image->source));
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return FALSE;
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}
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$exif = exif_read_data(drupal_realpath($image->source));
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if (isset($exif['Orientation'])) {
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switch ($exif['Orientation']) {
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case 3:
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$degrees = 180;
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break;
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case 6:
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$degrees = 90;
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break;
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case 8:
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$degrees = 270;
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break;
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default:
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$degrees = 0;
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}
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if ($degrees != 0) {
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$org_width = $image->info['width'];
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$org_height = $image->info['height'];
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image_rotate($image, $degrees);
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if (($degrees === 90 || $degrees === 270) && $image->info['width'] === $org_width) {
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// The toolkit failed to alter the dimensions (imagemagick currently
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// fails to do so). So we do it ourselves.
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$image->info['width'] = $org_height;
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$image->info['height'] = $org_width;
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}
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}
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}
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}
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else if ($image->source === 'modules/image/sample.png' && !function_exists('exif_read_data')) {
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// Issue a warning if we are in the admin screen and the exif extension is
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// not enabled.
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drupal_set_message(t('The exif_read_data() function is not available in this PHP installation. You probably will have to enable the exif extension.'), 'warning');
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}
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return TRUE;
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}
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/**
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* Image dimensions callback; Auto-rotate.
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*
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* @param array $dimensions
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* An array with the dimensions (in pixels) to be modified.
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* @param array $data
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* An array of parameters for the autorotate effect (empty for this effect).
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*/
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function imagecache_autorotate_dimensions(array &$dimensions, array $data) {
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// We can only know the resulting dimensions if both dimensions are equal.
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// Otherwise we need to inspect the image itself, which is not passed in here.
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// (this callback was introduced to enhance performance by not accessing the
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// image file when rendering the width and height attributes of the html img
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// tag).
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if ($dimensions['width'] !== $dimensions['height']) {
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$dimensions['width'] = $dimensions['height'] = NULL;
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}
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}
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