/**
* Renders the actual binary image using GD library calls.
*
* @since 1.0
*/
public function renderImage()
{
$config = ConfigProvider::getInstance();
// if scaled, we need to compute the target image size
if ($this->scale->getBooleanValue() && isset($_COOKIE['screenSize'])) {
$originalScreenResolution = explode('x', $config->get('sysCMSImagesWidgetScreenResolution'));
$originalScreenX = $originalScreenResolution[0];
$originalScreenY = $originalScreenResolution[1];
$targetScreenResolution = explode('x', $_COOKIE['screenSize']);
$targetScreenX = $targetScreenResolution[0];
$targetScreenY = $targetScreenResolution[1];
// calculate the new units we will scale by
$xu = $targetScreenX / $originalScreenX;
$yu = $targetScreenY / $originalScreenY;
$this->width = new Integer(intval($this->width->getValue() * $xu));
$this->height = new Integer(intval($this->height->getValue() * $yu));
// need to update the cache filename as the dimensions have changed
$this->setFilename();
}
// check the image cache first before we proceed
if ($this->checkCache()) {
$this->loadCache();
} else {
// now get the old image
switch ($this->sourceType->getValue()) {
case 'gif':
$old_image = imagecreatefromgif($this->source);
break;
case 'jpg':
$old_image = imagecreatefromjpeg($this->source);
break;
case 'png':
$old_image = imagecreatefrompng($this->source);
break;
}
if (!$old_image) {
$im = imagecreatetruecolor($this->width->getValue(), $this->height->getValue());
$bgc = imagecolorallocate($im, 255, 255, 255);
$tc = imagecolorallocate($im, 0, 0, 0);
imagefilledrectangle($im, 0, 0, $this->width->getValue(), $this->height->getValue(), $bgc);
imagestring($im, 1, 5, 5, "Error loading {$this->source}", $tc);
if ($this->sourceType->getValue() == 'png' && $config->get('cms.images.perserve.png')) {
imagepng($im);
} else {
imagejpeg($im);
}
imagedestroy($im);
} else {
// the dimensions of the source image
$oldWidth = imagesx($old_image);
$oldHeight = imagesy($old_image);
// now create the new image
$new_image = imagecreatetruecolor($this->width->getValue(), $this->height->getValue());
// set a transparent background for PNGs
if ($this->sourceType->getValue() == 'png' && $config->get('cms.images.perserve.png')) {
// Turn off transparency blending (temporarily)
imagealphablending($new_image, false);
// Create a new transparent color for image
$color = imagecolorallocatealpha($new_image, 255, 0, 0, 0);
// Completely fill the background of the new image with allocated color.
imagefill($new_image, 0, 0, $color);
// Restore transparency blending
imagesavealpha($new_image, true);
}
// copy the old image to the new image (in memory, not the file!)
imagecopyresampled($new_image, $old_image, 0, 0, 0, 0, $this->width->getValue(), $this->height->getValue(), $oldWidth, $oldHeight);
if ($this->sourceType->getValue() == 'png' && $config->get('cms.images.perserve.png')) {
imagepng($new_image);
} else {
imagejpeg($new_image, null, 100 * $this->quality->getValue());
}
$this->cache($new_image);
imagedestroy($old_image);
imagedestroy($new_image);
}
}
}
/**
* Handles get requests.
*
* @param Alpha\Util\Http\Request $request
*
* @return Alpha\Util\Http\Response
*
* @since 1.0
*
* @throws Alpha\Exception\ResourceNotFoundException
* @throws Alpha\Exception\ResourceNotAllowedException
*/
public function doGet($request)
{
self::$logger->debug('>>doGet(request=[' . var_export($request, true) . '])');
$config = ConfigProvider::getInstance();
$params = $request->getParams();
try {
$imgSource = urldecode($params['source']);
$imgWidth = $params['width'];
$imgHeight = $params['height'];
$imgType = $params['type'];
$imgQuality = (double) $params['quality'];
$imgScale = new Boolean($params['scale']);
$imgSecure = new Boolean($params['secure']);
} catch (\Exception $e) {
self::$logger->error('Required param missing for ImageController controller[' . $e->getMessage() . ']');
throw new ResourceNotFoundException('File not found');
}
$modified = filemtime($imgSource);
$responseHeaders = array();
$responseHeaders['Last-Modified'] = date('D, d M Y H:i:s', $modified) . ' GMT';
$responseHeaders['Cache-Control'] = 'max-age=1800';
// exit if not modified
if ($request->getHeader('If-Modified-Since') != null) {
if (strtotime($request->getHeader('If-Modified-Since')) == $modified) {
return new Response(304, '', $responseHeaders);
}
}
// handle secure tokens
if ($imgSecure->getBooleanValue() && $config->get('cms.images.widget.secure')) {
$valid = $this->checkSecurityFields();
// if not valid, just return a blank black image of the same dimensions
if (!$valid) {
$im = imagecreatetruecolor($imgWidth, $imgHeight);
$bgc = imagecolorallocate($im, 0, 0, 0);
imagefilledrectangle($im, 0, 0, $imgWidth, $imgHeight, $bgc);
if ($imgSource == 'png' && $config->get('cms.images.perserve.png')) {
ob_start();
imagepng($im);
$body = ob_get_contents();
$contentType = 'image/png';
ob_end_clean();
} else {
ob_start();
imagejpeg($im);
$body = ob_get_contents();
$contentType = 'image/jpeg';
ob_end_clean();
}
imagedestroy($im);
self::$logger->warn('The client [' . $request->getUserAgent() . '] was blocked from accessing the file [' . $imgSource . '] due to bad security tokens being provided');
$responseHeaders['Content-Type'] = $contentType;
return new Response(200, $body, $responseHeaders);
}
}
try {
$image = new Image($imgSource, $imgWidth, $imgHeight, $imgType, $imgQuality, $imgScale->getBooleanValue(), $imgSecure->getBooleanValue());
ob_start();
$image->renderImage();
$body = ob_get_contents();
ob_end_clean();
} catch (IllegalArguementException $e) {
self::$logger->error($e->getMessage());
throw new ResourceNotFoundException('File not found');
}
self::$logger->debug('<<__doGet');
if ($imgSource == 'png' && $config->get('cms.images.perserve.png')) {
$responseHeaders['Content-Type'] = 'image/png';
} else {
$responseHeaders['Content-Type'] = 'image/jpeg';
}
return new Response(200, $body, $responseHeaders);
}
