function theme_retina_images_style_preview in Retina Images 7

Returns HTML for a preview of an image style.

Parameters

$variables: An associative array containing:

• style: The image style array being previewed.

1 theme call to theme_retina_images_style_preview()

retina_images_form_image_style_form_alter in ./retina_images.module

Implements hook_form_FORM_ID_alter().

File

./retina_images.module, line 360

This module provides an image effect to assist in outputing high resolution images.

Code

function theme_retina_images_style_preview($variables) {
  $style = $variables['style'];
  $sample_image = variable_get('image_style_preview_image', drupal_get_path('module', 'image') . '/sample.png');
  $sample_width = 160;
  $sample_height = 160;

  // Set up original file information.
  $original_path = $sample_image;
  $original_image = image_get_info($original_path);
  if ($original_image['width'] > $original_image['height']) {
    $original_width = min($original_image['width'], $sample_width);
    $original_height = round($original_width / $original_image['width'] * $original_image['height']);
  }
  else {
    $original_height = min($original_image['height'], $sample_height);
    $original_width = round($original_height / $original_image['height'] * $original_image['width']);
  }
  $original_attributes = array_intersect_key($original_image, array(
    'width' => '',
    'height' => '',
  ));
  $original_attributes['style'] = 'width: ' . $original_width . 'px; height: ' . $original_height . 'px;';

  // Set up preview file information.
  $preview_file = image_style_path($style['name'], $original_path);
  if (!file_exists($preview_file)) {
    image_style_create_derivative($style, $original_path, $preview_file);
  }
  $preview_image = image_get_info($preview_file);
  if ($preview_image['width'] > $preview_image['height']) {
    $preview_width = min($preview_image['width'], $sample_width);
    $preview_height = round($preview_width / $preview_image['width'] * $preview_image['height']);
  }
  else {
    $preview_height = min($preview_image['height'], $sample_height);
    $preview_width = round($preview_height / $preview_image['height'] * $preview_image['width']);
  }
  $preview_attributes = array_intersect_key($preview_image, array(
    'width' => '',
    'height' => '',
  ));
  $preview_attributes['style'] = 'width: ' . $preview_width . 'px; height: ' . $preview_height . 'px;';

  // Calculate the final output size as theme_image_style would use since the
  // image may be retinafied.
  $final_output_size = array(
    'width' => $preview_image['width'],
    'height' => $preview_image['height'],
  );
  image_style_transform_dimensions($style['name'], $final_output_size);

  // Build our URL for our retinafied preview
  $url = 'admin/config/media/image-styles/retina_preview/' . $style['name'];

  // In the previews, timestamps are added to prevent caching of images.
  $output = '<div class="image-style-preview preview clearfix">';

  // Build the preview of the original image.
  $original_url = file_create_url($original_path);
  $output .= '<div class="preview-image-wrapper">';
  $output .= t('original') . ' (' . l(t('view actual size'), $original_url) . ')';
  $output .= '<div class="preview-image original-image" style="' . $original_attributes['style'] . '">';
  $output .= '<a href="' . $original_url . '">' . theme('image', array(
    'path' => $original_path,
    'alt' => t('Sample original image'),
    'title' => '',
    'attributes' => $original_attributes,
  )) . '</a>';
  $output .= '<div class="height" style="height: ' . $original_height . 'px"><span>' . $original_image['height'] . 'px</span></div>';
  $output .= '<div class="width" style="width: ' . $original_width . 'px"><span>' . $original_image['width'] . 'px</span></div>';
  $output .= '</div>';

  // End preview-image.
  $output .= '</div>';

  // End preview-image-wrapper.
  // Build the preview of the image style.
  $preview_url = file_create_url($preview_file) . '?cache_bypass=' . REQUEST_TIME;
  $output .= '<div class="preview-image-wrapper">';
  $output .= check_plain($style['name']) . ' (' . l(t('view actual size'), $url) . ')';
  $output .= '<div class="preview-image modified-image" style="' . $preview_attributes['style'] . '">';
  $output .= '<a href="' . url($url) . '?' . time() . '">' . theme('image', array(
    'path' => $preview_url,
    'alt' => t('Sample modified image'),
    'title' => '',
    'attributes' => $preview_attributes,
  )) . '</a>';
  $output .= '<div class="height" style="height: ' . $preview_height . 'px"><span>' . $final_output_size['height'] . 'px</span></div>';
  $output .= '<div class="width" style="width: ' . $preview_width . 'px"><span>' . $final_output_size['width'] . 'px</span></div>';
  $output .= '</div>';

  // End preview-image.
  $output .= '</div>';

  // End preview-image-wrapper.
  $output .= '</div>';

  // End image-style-preview.
  return $output;
}