image.devel_generate.inc

<?php

define('DEVEL_GENERATE_IMAGE_MAX', 5);
function image_devel_generate($object, $field, $instance, $bundle) {
    if (function_exists('imagejpeg')) {
        $devel_generate_image_function = variable_get('devel_generate_image_function', '_image_devel_generate');
        if (!function_exists($devel_generate_image_function)) {
            $devel_generate_image_function = '_image_devel_generate';
        }
        if (field_behaviors_widget('multiple values', $instance) == FIELD_BEHAVIOR_CUSTOM) {
            return devel_generate_multiple($devel_generate_image_function, $object, $field, $instance, $bundle);
        }
        else {
            return $devel_generate_image_function($object, $field, $instance, $bundle);
        }
    }
}
function _image_devel_generate($object, $field, $instance, $bundle) {
    $object_field = array();
    static $images = array();
    $min_resolution = empty($instance['settings']['min_resolution']) ? '100x100' : $instance['settings']['min_resolution'];
    $max_resolution = empty($instance['settings']['max_resolution']) ? '600x600' : $instance['settings']['max_resolution'];
    $extensions = array_intersect(explode(' ', $instance['settings']['file_extensions']), array(
        'png',
        'gif',
        'jpg',
        'jpeg',
    ));
    $extension = array_rand(drupal_map_assoc($extensions));
    // Generate a max of 5 different images.
    if (!isset($images[$extension][$min_resolution][$max_resolution]) || count($images[$extension][$min_resolution][$max_resolution]) <= DEVEL_GENERATE_IMAGE_MAX) {
        if ($path = devel_generate_image($extension, $min_resolution, $max_resolution)) {
            $destination_dir = $field['settings']['uri_scheme'] . '://' . $instance['settings']['file_directory'];
            file_prepare_directory($destination_dir, FILE_CREATE_DIRECTORY);
            if ($uri = file_unmanaged_move($path, $destination_dir)) {
                $file = new stdClass();
                $file->fid = NULL;
                $file->uri = $uri;
                $file->filename = drupal_basename($uri);
                $file->filemime = file_get_mimetype($file->uri);
                // @todo Randomize file owner.
                $file->uid = 1;
                $file = file_save($file);
                $images[$extension][$min_resolution][$max_resolution][$file->fid] = $file;
            }
            else {
                return FALSE;
            }
        }
        else {
            return FALSE;
        }
    }
    else {
        // Select one of the images we've already generated for this field.
        $file = new stdClass();
        $file->fid = array_rand($images[$extension][$min_resolution][$max_resolution]);
    }
    $object_field['fid'] = $file->fid;
    $object_field['alt'] = devel_create_greeking(4);
    $object_field['title'] = devel_create_greeking(4);
    return $object_field;
}

/**
 * Private function for creating a random image.
 *
 * This function only works with the GD toolkit. ImageMagick is not supported.
 */
function devel_generate_image($extension = 'png', $min_resolution, $max_resolution) {
    if ($tmp_file = drupal_tempnam('temporary://', 'imagefield_')) {
        $destination = $tmp_file . '.' . $extension;
        file_unmanaged_move($tmp_file, $destination, FILE_CREATE_DIRECTORY);
        $min = explode('x', $min_resolution);
        $max = explode('x', $max_resolution);
        $width = rand((int) $min[0], (int) $max[0]);
        $height = rand((int) $min[1], (int) $max[1]);
        // Make an image split into 4 sections with random colors.
        $im = imagecreate($width, $height);
        for ($n = 0; $n < 4; $n++) {
            $color = imagecolorallocate($im, rand(0, 255), rand(0, 255), rand(0, 255));
            $x = $width / 2 * ($n % 2);
            $y = $height / 2 * (int) ($n >= 2);
            imagefilledrectangle($im, $x, $y, $x + $width / 2, $y + $height / 2, $color);
        }
        // Make a perfect circle in the image middle.
        $color = imagecolorallocate($im, rand(0, 255), rand(0, 255), rand(0, 255));
        $smaller_dimension = min($width, $height);
        $smaller_dimension = $smaller_dimension % 2 ? $smaller_dimension : $smaller_dimension;
        imageellipse($im, $width / 2, $height / 2, $smaller_dimension, $smaller_dimension, $color);
        $save_function = 'image' . ($extension == 'jpg' ? 'jpeg' : $extension);
        $save_function($im, drupal_realpath($destination));
    }
    return $destination;
}