/**
* Return a URL content or write its output to file if a destination is provided.
*
* Note, this implementation require the PHP CURL extension installed.
*
* @param string $url Content source
* @param string $destination [optional] File destination where output should be written
* @return mixed URL content or boolean true if a destination is provided
*/
public static function read($url,$destination=null){
if(!function_exists('curl_init')){
throw new Exception('PHP CURL Extension Required');
}
$ch = curl_init($url);
curl_setopt($ch,CURLOPT_HEADER,false);
if($destination){
PurFile::mkdir(dirname($destination));
if(file_exists($destination)) PurFile::delete($destination);
$fp = fopen($destination,'w');
curl_setopt($ch,CURLOPT_FILE,$fp);
}else{
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1) ;
}
if(($data = curl_exec($ch))===false){
throw new Exception('Failed to download url: "'.$url.'"');
}
$header = curl_getinfo($ch);
curl_close($ch);
if($destination){
fclose($fp);
}
if($header['http_code']!=self::SUCCESS_OK){
if($destination){
PurFile::delete($destination);
}
throw new Exception('Download Failed: "'.constant('PurHTTP::'.'CODE_'.$header['http_code']).'" ('.$header['http_code'].')');
}
return $data;
}
/**
* Create an image resource base on the provided file path.
*
* Options may include:
* - *width*: Canvas width of the generated image or resource; "100" and "80+top" (with top defined as 20) for 100 pixels
* - *height*: Canvas height of the generated image or resource; "50" and "25+top" (with top defined as 20) for 75 pixels
* - *top*: Offset from the top of the source in pixel
* - *left*: Offset from the left of the source in pixel
* - *bottom*: Offset from the bottom of the source in pixel
* - *right*: Offset from the right of the source in pixel
* - *temp_dir*: Path to temporary working directory
* - *gm_convert*: Path to the gm convert utility (used for psd images, usually "gm convert" or "convert")
*
* Create a new transparent resource of 100x75 pixels:
* * PurImage::resource(array('width'=>100,'height'=>75));
*
* Create a resource from a psd file (with "gm" available in your path as "gm convert...")
* * PurImage::resource('path/to/image.psd');
*
* Create a resource from a psd file (with "gm" not available but installed)
* * PurImage::resource('path/to/image.psd',array('gm_convert'=>'/usr/bin/gm convert'));
*
* @return resource Resource associated to the file path
* @param mixed $source File path referencing an image or null to create a transparent resource
* @param array $options[optional] Configuration array
*/
public static function resource($source=null,array $options=array()){
if(is_array($source)){
$options = $source;
$source = null;
}
if(empty($source)){
if(empty($options['width'])||empty($options['height'])){
throw new InvalidArgumentException('Missing Options: width and height required when creating a new resource');
}
$resource = imagecreatetruecolor($options['width'],$options['height']);
imagesavealpha($resource, true);
imagefill($resource,0,0,imagecolorallocatealpha($resource,255,255,255,127));
return $resource;
}else if(is_string($source)){
if(!is_readable($source)) throw new InvalidArgumentException('Invalid Source Path: '.PurLang::toString($source).'');
$type = exif_imagetype($source);
switch($type){
case IMAGETYPE_GIF:
$source = imagecreatefromgif($source);
break;
case IMAGETYPE_JPEG:
$source = imagecreatefromjpeg($source);
break;
case IMAGETYPE_PNG:
$source = imagecreatefrompng($source);
break;
case IMAGETYPE_SWF:
break;
case IMAGETYPE_PSD:
if(!isset($options['gm_convert'])){
throw new Exception('Missing Option For PSD Image Type: gm_convert');
}
$temp = (isset($options['temp_dir'])?$options['temp_dir']:sys_get_temp_dir()).'/'.uniqid();
$cmd = $options['gm_convert'].' -flatten '.escapeshellarg($source).' '.escapeshellarg('png:'.$temp);
exec($cmd);
$source = imagecreatefrompng($temp);
PurFile::delete($temp);
break;
case IMAGETYPE_BMP:
break;
case IMAGETYPE_TIFF_II:
break;
case IMAGETYPE_TIFF_MM:
break;
case IMAGETYPE_JPC:
break;
case IMAGETYPE_JP2:
break;
case IMAGETYPE_JPX:
break;
case IMAGETYPE_JB2:
break;
case IMAGETYPE_SWC:
break;
case IMAGETYPE_IFF:
break;
case IMAGETYPE_WBMP:
$source = imagecreatefromwbmp($source);
break;
case IMAGETYPE_XBM:
$source = imagecreatefromxbm($source);
break;
}
$created = true;
}else if(is_resource($source)){
$created = false;
}else{
throw new InvalidArgumentException('Invalid Source: empty, string or resource accepted');
}
// width
// height
// top
// left
// bottom
// right
// imagecopyresampled($dst_im, $src_im, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h)
$sourceWidth = imagesx($source);
$sourceHeight = imagesy($source);
// Sanitize width and height
if(!empty($options['width'])&&!empty($options['height'])){
if($options['width']!=$sourceWidth&&$options['height']!=$sourceHeight){
$resized = true;
}
}else if(!empty($options['width'])&&$options['width']!=$sourceWidth){
$resized = true;
$options['height'] = $sourceHeight*$options['width']/$sourceWidth;
}else if(!empty($options['height'])&&$options['height']!=$sourceHeight){
$resized = true;
$options['width'] = $sourceWidth*$options['height']/$sourceHeight;
}
// Sanitize resize as an array with width and height keys
if(!empty($options['resize'])){
$resized = true;
switch(gettype($options['resize'])){
case 'string':
$options['resize'] = explode('x',$options['resize']);
case 'array':
if(empty($options['resize'])||count($options['resize'])>2){
throw new Exception('Invalid "resize": '.PurLang::toString($options['resize']));
}
// Deal with map
if(!empty($options['resize']['width'])){
$width = $options['resize']['width'];
}
if(!empty($options['resize']['height'])){
$height = $options['resize']['height'];
}
// Deal with index
if(!isset($width)){
$width = array_shift($options['resize']);
}
if(!isset($height)){
$height = array_shift($options['resize']);
}
// Deal with *
if($width=='*') $width = null;
if($height=='*') $height = null;
// Rebuild resize
$options['resize']['width'] = $width;
unset($width);
$options['resize']['height'] = $height;
unset($height);
if(empty($options['resize']['width'])){
$options['resize']['width'] = $sourceWidth*$options['resize']['height']/$sourceHeight;
}else if(empty($options['resize']['height'])){
$options['resize']['height'] = $sourceHeight*$options['resize']['width']/$sourceWidth;
}
break;
default:
throw new Exception('Invalid "resize": '.PurLang::toString($options['resize']));
}
}else{
$options['resize'] = array('width'=>$sourceWidth,'height'=>$sourceHeight);
}
if(isset($resized)){
$destination = self::resource(null,$options);
imagecopyresampled($destination,$source,0,0,0,0,
$options['resize']['width'],$options['resize']['height'],
$sourceWidth,$sourceHeight);
if($created){
imagedestroy($source);
}
$source = $destination;
}
return $source;
}
