Contents

Code Reference Classes BP_Media_Rotation

BP_Media_Rotation

Fixes media rotation from mobile uploads

Description

Source

File: bp-media/classes/class-bp-media-rotation.php

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class BP_Media_Rotation {
 
    /**
     * Constructor method.
     *
     * @since BuddyBoss 1.1.1
     */
    function __construct() {
        add_action( 'bp_init', array( $this, 'init' ) );
    }
 
    function init() {
        add_action( 'bp_media_attachment_uploaded', array( $this, 'attachment_uploaded' ) );
    }
 
    /**
     * Attachment uploaded and fix rotation
     *
     * @param $id
     *
     * @since BuddyBoss 1.1.1
     */
    function attachment_uploaded( $id ) {
        global $bp_media_rotation_fix_id;
        $bp_media_rotation_fix_id = $id;
 
        $attachment = get_post( $id );
        $path       = get_attached_file( $id );
 
        if ( 'image/jpeg' == $attachment->post_mime_type && ! empty( $path ) && file_exists( $path ) ) {
            // Add a fallback on shutdown in the case that memory runs out
            add_action( 'shutdown', array( $this, 'rotation_shutdown_fallback' ) );
 
            $status = $this->fix_rotation( $path );
 
            if ( ! empty( $status ) ) {
                $attachment_meta = wp_generate_attachment_metadata( $id, $path );
                wp_update_attachment_metadata( $id, $attachment_meta );
            }
        }
    }
 
    /**
     * Attempt to capture a failed image rotation due to memory exhaustion
     *
     * @since BuddyBoss 1.1.1
     */
    function rotation_shutdown_fallback() {
        global $bp_media_rotation_fix_id;
 
        $error = error_get_last();
 
        // Make sure an error was thrown from this file
        if ( empty( $error ) || empty( $error['file'] ) || (int) $error['type'] !== 1
             || $error['file'] !== __FILE__ ) {
            return;
        }
 
        @header( "HTTP/1.1 200 OK" );
 
        $aid        = $bp_media_rotation_fix_id;
        $attachment = get_post( $aid );
        $name       = $url = null;
 
        if ( $attachment !== null ) {
            $name     = $attachment->post_title;
            $url_nfo  = wp_get_attachment_image_src( $aid );
            $url      = is_array( $url_nfo ) && ! empty( $url_nfo ) ? $url_nfo[0] : null;
        }
 
        $result = array(
            'status'        => ( $attachment !== null ),
            'attachment_id' => (int) $aid,
            'url'           => esc_url( $url ),
            'name'          => esc_attr( $name )
        );
 
        echo htmlspecialchars( json_encode( $result ), ENT_NOQUOTES );
        exit( 0 );
    }
 
    /**
     * Fix rotation of mobile uploaded images
     *
     * @since BuddyBoss 1.1.1
     * @param $source
     *
     * @return bool
     */
    function fix_rotation( $source ) {
        if ( ! file_exists( $source ) ) {
            return false;
        }
 
        $exif = null;
        $ort  = 0;
 
        if ( function_exists( 'exif_read_data' ) ) {
            $exif = @exif_read_data( $source );
            $ort  = isset( $exif['Orientation'] ) ? $exif['Orientation'] : 0;
        }
 
        if ( $ort > 1 ) {
            $destination = $source;
            $size        = getimagesize( $source );
 
            $width  = $size[0];
            $height = $size[1];
 
            $sourceImage      = imagecreatefromjpeg( $source );
            $destinationImage = imagecreatetruecolor( $width, $height );
            //Specifies the color of the uncovered zone after the rotation
            $bgd_color = imagecolorallocatealpha( $destinationImage, 0, 0, 0, 127 );
 
            imagecopyresampled( $destinationImage, $sourceImage, 0, 0, 0, 0, $width, $height, $width, $height );
 
            switch ( $ort ) {
                case 2:
                    $this->flip_image( $dimg );
                    break;
                case 3:
                    $destinationImage = imagerotate( $destinationImage, 180, $bgd_color );
                    break;
                case 4:
                    $this->flip_image( $dimg );
                    break;
                case 5:
                    $this->flip_image( $destinationImage );
                    $destinationImage = imagerotate( $destinationImage, - 90, $bgd_color );
                    break;
                case 6:
                    $destinationImage = imagerotate( $destinationImage, - 90, $bgd_color );
                    break;
                case 7:
                    $this->flip_image( $destinationImage );
                    $destinationImage = imagerotate( $destinationImage, - 90, $bgd_color );
                    break;
                case 8:
                    $destinationImage = imagerotate( $destinationImage, 90, $bgd_color );
                    break;
            }
 
            return imagejpeg( $destinationImage, $destination, 100 );
        }
    }
 
    /**
     * Flips the image
     *
     * @param $image
     *
     * @return bool
     */
    function flip_image( &$image ) {
        $x      = 0;
        $y      = 0;
        $height = null;
        $width  = null;
 
        if ( $width < 1 ) {
            $width = imagesx( $image );
        }
 
        if ( $height < 1 ) {
            $height = imagesy( $image );
        }
 
        if ( function_exists( 'imageistruecolor' ) && imageistruecolor( $image ) ) {
            $tmp = imagecreatetruecolor( 1, $height );
        } else {
            $tmp = imagecreate( 1, $height );
        }
 
        $x2 = $x + $width - 1;
 
        for ( $i = (int) floor( ( $width - 1 ) / 2 ); $i >= 0; $i -- ) {
            imagecopy( $tmp, $image, 0, 0, $x2 - $i, $y, 1, $height );
            imagecopy( $image, $image, $x2 - $i, $y, $x + $i, $y, 1, $height );
            imagecopy( $image, $tmp, $x + $i, $y, 0, 0, 1, $height );
        }
 
        imagedestroy( $tmp );
 
        return true;
    }
}

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Changelog
Version Description
BuddyPress 1.1.1 Introduced.

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