Contains \Drupal\system\Plugin\ImageToolkit\GDToolkit;.
<?php
/**
* @file
* Contains \Drupal\system\Plugin\ImageToolkit\GDToolkit;.
*/
namespace Drupal\system\Plugin\ImageToolkit;
use Drupal\Component\Plugin\PluginBase;
use Drupal\Component\Annotation\Plugin;
use Drupal\Core\Annotation\Translation;
use Drupal\system\Plugin\ImageToolkitInterface;
/**
* Defines the GD2 toolkit for image manipulation within Drupal.
*
* @Plugin(
* id = "gd",
* title = @Translation("GD2 image manipulation toolkit")
* )
*/
class GDToolkit extends PluginBase implements ImageToolkitInterface {
/**
* Implements \Drupal\system\Plugin\ImageToolkitInterface::settingsForm().
*/
public function settingsForm() {
$form['image_jpeg_quality'] = array(
'#type' => 'number',
'#title' => t('JPEG quality'),
'#description' => t('Define the image quality for JPEG manipulations. Ranges from 0 to 100. Higher values mean better image quality but bigger files.'),
'#min' => 0,
'#max' => 100,
'#default_value' => config('system.image.gd')
->get('jpeg_quality'),
'#field_suffix' => t('%'),
);
return $form;
}
/**
* Implements \Drupal\system\Plugin\ImageToolkitInterface::settingsFormSubmit().
*/
public function settingsFormSubmit($form, &$form_state) {
config('system.image.gd')
->set('jpeg_quality', $form_state['values']['gd']['image_jpeg_quality'])
->save();
}
/**
* Implements \Drupal\system\Plugin\ImageToolkitInterface::resize().
*/
public function resize($image, $width, $height) {
$res = $this
->createTmp($image, $width, $height);
if (!imagecopyresampled($res, $image->resource, 0, 0, 0, 0, $width, $height, $image->info['width'], $image->info['height'])) {
return FALSE;
}
imagedestroy($image->resource);
// Update image object.
$image->resource = $res;
$image->info['width'] = $width;
$image->info['height'] = $height;
return TRUE;
}
/**
* Implements \Drupal\system\Plugin\ImageToolkitInterface::rotate().
*/
public function rotate($image, $degrees, $background = NULL) {
// PHP installations using non-bundled GD do not have imagerotate.
if (!function_exists('imagerotate')) {
watchdog('image', 'The image %file could not be rotated because the imagerotate() function is not available in this PHP installation.', array(
'%file' => $image->source,
));
return FALSE;
}
$width = $image->info['width'];
$height = $image->info['height'];
// Convert the hexadecimal background value to a color index value.
if (isset($background)) {
$rgb = array();
for ($i = 16; $i >= 0; $i -= 8) {
$rgb[] = $background >> $i & 0xff;
}
$background = imagecolorallocatealpha($image->resource, $rgb[0], $rgb[1], $rgb[2], 0);
}
else {
// Get the current transparent color.
$background = imagecolortransparent($image->resource);
// If no transparent colors, use white.
if ($background == 0) {
$background = imagecolorallocatealpha($image->resource, 255, 255, 255, 0);
}
}
// Images are assigned a new color palette when rotating, removing any
// transparency flags. For GIF images, keep a record of the transparent color.
if ($image->info['extension'] == 'gif') {
$transparent_index = imagecolortransparent($image->resource);
if ($transparent_index != 0) {
$transparent_gif_color = imagecolorsforindex($image->resource, $transparent_index);
}
}
$image->resource = imagerotate($image->resource, 360 - $degrees, $background);
// GIFs need to reassign the transparent color after performing the rotate.
if (isset($transparent_gif_color)) {
$background = imagecolorexactalpha($image->resource, $transparent_gif_color['red'], $transparent_gif_color['green'], $transparent_gif_color['blue'], $transparent_gif_color['alpha']);
imagecolortransparent($image->resource, $background);
}
$image->info['width'] = imagesx($image->resource);
$image->info['height'] = imagesy($image->resource);
return TRUE;
}
/**
* Implements \Drupal\system\Plugin\ImageToolkitInterface::crop().
*/
public function crop($image, $x, $y, $width, $height) {
$res = $this
->createTmp($image, $width, $height);
if (!imagecopyresampled($res, $image->resource, 0, 0, $x, $y, $width, $height, $width, $height)) {
return FALSE;
}
// Destroy the original image and return the modified image.
imagedestroy($image->resource);
$image->resource = $res;
$image->info['width'] = $width;
$image->info['height'] = $height;
return TRUE;
}
/**
* Implements \Drupal\system\Plugin\ImageToolkitInterface::desaturate().
*/
public function desaturate($image) {
// PHP installations using non-bundled GD do not have imagefilter.
if (!function_exists('imagefilter')) {
watchdog('image', 'The image %file could not be desaturated because the imagefilter() function is not available in this PHP installation.', array(
'%file' => $image->source,
));
return FALSE;
}
return imagefilter($image->resource, IMG_FILTER_GRAYSCALE);
}
/**
* Implements \Drupal\system\Plugin\ImageToolkitInterface::load().
*/
public function load($image) {
$extension = str_replace('jpg', 'jpeg', $image->info['extension']);
$function = 'imagecreatefrom' . $extension;
if (function_exists($function) && ($image->resource = $function($image->source))) {
if (!imageistruecolor($image->resource)) {
// Convert indexed images to true color, so that filters work
// correctly and don't result in unnecessary dither.
$new_image = $this
->createTmp($image, $image->info['width'], $image->info['height']);
imagecopy($new_image, $image->resource, 0, 0, 0, 0, $image->info['width'], $image->info['height']);
imagedestroy($image->resource);
$image->resource = $new_image;
}
return (bool) $image->resource;
}
return FALSE;
}
/**
* Implements \Drupal\system\Plugin\ImageToolkitInterface::save().
*/
public function save($image, $destination) {
$scheme = file_uri_scheme($destination);
// Work around lack of stream wrapper support in imagejpeg() and imagepng().
if ($scheme && file_stream_wrapper_valid_scheme($scheme)) {
// If destination is not local, save image to temporary local file.
$local_wrappers = file_get_stream_wrappers(STREAM_WRAPPERS_LOCAL);
if (!isset($local_wrappers[$scheme])) {
$permanent_destination = $destination;
$destination = drupal_tempnam('temporary://', 'gd_');
}
// Convert stream wrapper URI to normal path.
$destination = drupal_realpath($destination);
}
$extension = str_replace('jpg', 'jpeg', $image->info['extension']);
$function = 'image' . $extension;
if (!function_exists($function)) {
return FALSE;
}
if ($extension == 'jpeg') {
$success = $function($image->resource, $destination, config('system.image.gd')
->get('jpeg_quality'));
}
else {
// Always save PNG images with full transparency.
if ($extension == 'png') {
imagealphablending($image->resource, FALSE);
imagesavealpha($image->resource, TRUE);
}
$success = $function($image->resource, $destination);
}
// Move temporary local file to remote destination.
if (isset($permanent_destination) && $success) {
return (bool) file_unmanaged_move($destination, $permanent_destination, FILE_EXISTS_REPLACE);
}
return $success;
}
/**
* Implements \Drupal\system\Plugin\ImageToolkitInterface::getInfo().
*/
public function getInfo($image) {
$details = FALSE;
$data = getimagesize($image->source);
if (isset($data) && is_array($data)) {
$extensions = array(
'1' => 'gif',
'2' => 'jpg',
'3' => 'png',
);
$extension = isset($extensions[$data[2]]) ? $extensions[$data[2]] : '';
$details = array(
'width' => $data[0],
'height' => $data[1],
'extension' => $extension,
'mime_type' => $data['mime'],
);
}
return $details;
}
/**
* Creates a truecolor image preserving transparency from a provided image.
*
* @param object $image
* An image object.
* @param int $width
* The new width of the new image, in pixels.
* @param int $height
* The new height of the new image, in pixels.
*
* @return resource
* A GD image handle.
*/
public function createTmp($image, $width, $height) {
$res = imagecreatetruecolor($width, $height);
if ($image->info['extension'] == 'gif') {
// Grab transparent color index from image resource.
$transparent = imagecolortransparent($image->resource);
if ($transparent >= 0) {
// The original must have a transparent color, allocate to the new image.
$transparent_color = imagecolorsforindex($image->resource, $transparent);
$transparent = imagecolorallocate($res, $transparent_color['red'], $transparent_color['green'], $transparent_color['blue']);
// Flood with our new transparent color.
imagefill($res, 0, 0, $transparent);
imagecolortransparent($res, $transparent);
}
}
elseif ($image->info['extension'] == 'png') {
imagealphablending($res, FALSE);
$transparency = imagecolorallocatealpha($res, 0, 0, 0, 127);
imagefill($res, 0, 0, $transparency);
imagealphablending($res, TRUE);
imagesavealpha($res, TRUE);
}
else {
imagefill($res, 0, 0, imagecolorallocate($res, 255, 255, 255));
}
return $res;
}
/**
* Implements \Drupal\system\Plugin\ImageToolkitInterface::isAvailable().
*/
public static function isAvailable() {
if ($check = get_extension_funcs('gd')) {
if (in_array('imagegd2', $check)) {
// GD2 support is available.
return TRUE;
}
}
return FALSE;
}
}