image_effect.module in image effect 7

Image Effect module file.

File

image_effect.module

<?php

/**
 * @file
 * Image Effect module file.
 */

/**
 * Implements hook_help().
 */
function image_effect_help($path, $arg) {
  switch ($path) {
    case "admin/help#image_effect":
      return '<p>' . t('add image effect to image module.') . '</p>';
      break;
  }
}

/**
 * Implements hook_image_effect_info()
 */
function image_effect_image_effect_info() {
  $effects = array();
  $effects['advance_resize'] = array(
    'label' => t('Advance Resize'),
    'help' => t('Resize image with white background.'),
    'effect callback' => 'image_advance_resize_effect',
    'dimensions callback' => 'image_resize_dimensions',
    'form callback' => 'image_advance_resize_form',
    'summary theme' => 'image_resize_summary',
  );
  return $effects;
}
function image_advance_resize_effect(&$image, $data) {
  if (!image_advance_resize($image, $data['width'], $data['height'], $data['background'])) {
    watchdog('image', 'Image resize failed using the %toolkit toolkit on %path (%mimetype, %dimensions)', array(
      '%toolkit' => $image->toolkit,
      '%path' => $image->source,
      '%mimetype' => $image->info['mime_type'],
      '%dimensions' => $image->info['width'] . 'x' . $image->info['height'],
    ), WATCHDOG_ERROR);
    return FALSE;
  }
  return TRUE;
}
function image_advance_resize(stdClass $image, $width, $height, $background) {
  return image_effect_image_toolkit_invoke('advance_resize', $image, array(
    $width,
    $height,
    $background,
  ));
}
function image_advance_resize_form($data) {
  $form['width'] = array(
    '#type' => 'textfield',
    '#title' => t('Width'),
    '#default_value' => isset($data['width']) ? $data['width'] : '',
    '#field_suffix' => ' ' . t('pixels'),
    '#required' => TRUE,
    '#size' => 10,
    '#element_validate' => array(
      'image_effect_integer_validate',
    ),
    '#allow_negative' => FALSE,
  );
  $form['height'] = array(
    '#type' => 'textfield',
    '#title' => t('Height'),
    '#default_value' => isset($data['height']) ? $data['height'] : '',
    '#field_suffix' => ' ' . t('pixels'),
    '#required' => TRUE,
    '#size' => 10,
    '#element_validate' => array(
      'image_effect_integer_validate',
    ),
    '#allow_negative' => FALSE,
  );
  $form['background'] = array(
    '#type' => 'checkbox',
    '#title' => t('Use transparent background'),
    '#default_value' => isset($data['background']) ? $data['background'] : NULL,
  );
  return $form;
}
function image_effect_image_toolkit_invoke($method, stdClass $image, array $params = array()) {
  $function = 'image_effect_' . $image->toolkit . '_' . $method;
  if (function_exists($function)) {
    array_unshift($params, $image);
    return call_user_func_array($function, $params);
  }
  watchdog('image', 'The selected image handling toolkit %toolkit can not correctly process %function.', array(
    '%toolkit' => $image->toolkit,
    '%function' => $function,
  ), WATCHDOG_ERROR);
  return FALSE;
}
function image_effect_gd_advance_resize(stdClass $image, $width, $height, $background) {
  $w = $width;
  $h = $height;
  $src_x = 0;
  $src_y = 0;
  $src_w = $image->info['width'];
  $src_h = $image->info['height'];
  $src_image = $image->resource;
  $dst_w = $src_w;
  $dst_h = $src_h;
  $dst_x = 0;
  $dst_y = 0;
  if ($w > $src_w) {
    $dst_x = ($w - $src_w) / 2;
  }
  if ($h > $src_h) {
    $dst_y = ($h - $src_h) / 2;
  }
  $dst_image = imagecreatetruecolor($w, $h);
  if (!empty($background)) {
    imagesavealpha($dst_image, true);
    $backgroundColor = imagecolorallocatealpha($dst_image, 0, 0, 0, 127);
  }
  else {
    $backgroundColor = imagecolorallocate($dst_image, 255, 255, 255);
  }
  imagefill($dst_image, 0, 0, $backgroundColor);
  imagecopyresampled($dst_image, $src_image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h);
  imagedestroy($src_image);
  $image->resource = $dst_image;
  $image->info['width'] = $w;
  $image->info['height'] = $h;
  return TRUE;
}
function image_effect_imagick_advance_resize(stdClass $image, $width, $height, $background) {
  $w = $width;
  $h = $height;
  $src_x = 0;
  $src_y = 0;
  $src_w = $image->info['width'];
  $src_h = $image->info['height'];
  $src_image = $image->resource;
  $dst_w = $src_w;
  $dst_h = $src_h;
  $dst_x = 0;
  $dst_y = 0;
  if ($w > $src_w) {
    $dst_x = ($w - $src_w) / 2;
  }
  if ($h > $src_h) {
    $dst_y = ($h - $src_h) / 2;
  }
  $dst_image = new Imagick();
  if (!empty($background)) {
    $dst_image
      ->newImage($w, $h, new ImagickPixel("transparent"));
  }
  else {
    $dst_image
      ->newImage($w, $h, new ImagickPixel("white"));
  }
  $dst_image
    ->compositeImage($src_image, Imagick::COMPOSITE_DEFAULT, $dst_x, $dst_y);
  $src_image
    ->destroy();
  $image->resource = $dst_image;
  $image->info['width'] = $w;
  $image->info['height'] = $h;
  return TRUE;
}

Functions

Name	Description
image_advance_resize
image_advance_resize_effect
image_advance_resize_form
image_effect_gd_advance_resize
image_effect_help	Implements hook_help().
image_effect_image_effect_info	Implements hook_image_effect_info()
image_effect_image_toolkit_invoke
image_effect_imagick_advance_resize