AAAAhome/academiac/www/administrator/components/com_unitehcarousel/unitejoomla/image_view.class.php000060400000043374151372727210027441 0ustar00pathCache = $pathCache; $this->pathImages = $pathImages; $this->urlImages = $urlImages; $this->pathEmptyImage = $pathEmptyImage; } /** * * set jpg quality output */ public function setJPGQuality($quality){ $this->jpg_quality = $quality; } /** * * get thumb url */ public static function getUrlThumb($urlBase, $filename,$width=null,$height=null,$exact=false,$effect=null,$effect_param=null){ $filename = urlencode($filename); $url = $urlBase."&img=$filename"; if(!empty($width)) $url .= "&w=".$width; if(!empty($height)) $url .= "&h=".$height; if($exact == true){ $url .= "&t=".self::TYPE_EXACT; } if(!empty($effect)){ $url .= "&e=".$effect; if(!empty($effect_param)) $url .= "&ea1=".$effect_param; } return($url); } /** * * throw error */ private function throwError($message,$code=null){ UniteFunctionsHCar::throwError($message,$code); } /** * get thumb filename from the input * */ public static function getThumbFilenameFromInput($filename,$width,$height,$exact){ $info = pathInfo($filename); $ext = UniteFunctionsHCar::getVal($info, "extension"); $name = $info["filename"]; $thumbFilename = $name."_".$width."x".$height; if($exact == true) $thumbFilename .= "_exact"; $postfix = ""; $dirname = UniteFunctionsHCar::getVal($info, "dirname"); if(!empty($dirname)) $postfix = str_replace("/", "-", $dirname); if(!empty($postfix)) $thumbFilename .= "_".$postfix; $thumbFilename.= '.'.$ext; return($thumbFilename); } /** * * get filename for thumbnail save / retrieve * TODO: do input validations - security measures */ private function getThumbFilename(){ $info = pathInfo($this->filename); //add dirname as postfix (if exists) $postfix = ""; $dirname = UniteFunctionsHCar::getVal($info, "dirname"); if(!empty($dirname)){ $postfix = str_replace("/", "-", $dirname); } $ext = $info["extension"]; $name = $info["filename"]; $width = ceil($this->maxWidth); $height = ceil($this->maxHeight); $thumbFilename = $name."_".$width."x".$height; if(!empty($this->type)) $thumbFilename .= "_" . $this->type; if(!empty($this->effect)){ $thumbFilename .= "_e" . $this->effect; if(!empty($this->effect_arg1)){ $thumbFilename .= "x" . $this->effect_arg1; } } //add postfix if(!empty($postfix)) $thumbFilename .= "_".$postfix; $thumbFilename .= ".".$ext; return($thumbFilename); } //------------------------------------------------------------------------------------------ // get thumbnail fielpath by parameters. private function getThumbFilepath(){ $filename = $this->getThumbFilename(); $filepath = $this->pathCache .$filename; return($filepath); } //------------------------------------------------------------------------------------------ // ouptput emtpy image code. private function outputEmptyImageCode(){ echo "empty image"; exit(); } //------------------------------------------------------------------------------------------ // outputs image and exit. private function outputImage($filepath){ $info = UniteFunctionsHCar::getPathInfo($filepath); $ext = $info["extension"]; $filetime = filemtime($filepath); $ext = strtolower($ext); if($ext == "jpg") $ext = "jpeg"; $numExpires = 31536000; //one year $strExpires = @date('D, d M Y H:i:s',time()+$numExpires); $strModified = @date('D, d M Y H:i:s',$filetime); $contents = file_get_contents($filepath); $filesize = strlen($contents); header("Last-Modified: $strModified GMT"); header("Expires: $strExpires GMT"); header("Cache-Control: public"); header("Content-Type: image/$ext"); header("Content-Length: $filesize"); echo $contents; exit(); } //------------------------------------------------------------------------------------------ // get src image from filepath according the image type private function getGdSrcImage($filepath,$type){ // create the image $src_img = false; switch($type){ case IMAGETYPE_JPEG: $src_img = @imagecreatefromjpeg($filepath); break; case IMAGETYPE_PNG: $src_img = @imagecreatefrompng($filepath); break; case IMAGETYPE_GIF: $src_img = @imagecreatefromgif($filepath); break; case IMAGETYPE_BMP: $src_img = @imagecreatefromwbmp($filepath); break; default: $this->throwError("wrong image format, can't resize"); break; } if($src_img == false){ $this->throwError("Can't resize image"); } return($src_img); } //------------------------------------------------------------------------------------------ // save gd image to some filepath. return if success or not private function saveGdImage($dst_img,$filepath,$type){ $successSaving = false; switch($type){ case IMAGETYPE_JPEG: $successSaving = imagejpeg($dst_img,$filepath,$this->jpg_quality); break; case IMAGETYPE_PNG: $successSaving = imagepng($dst_img,$filepath); break; case IMAGETYPE_GIF: $successSaving = imagegif($dst_img,$filepath); break; case IMAGETYPE_BMP: $successSaving = imagewbmp($dst_img,$filepath); break; } return($successSaving); } //------------------------------------------------------------------------------------------ // crop image to specifix height and width , and save it to new path private function cropImageSaveNew($filepath,$filepathNew){ $imgInfo = getimagesize($filepath); $imgType = $imgInfo[2]; $src_img = $this->getGdSrcImage($filepath,$imgType); $width = imageSX($src_img); $height = imageSY($src_img); //crop the image from the top $startx = 0; $starty = 0; //find precrop width and height: $percent = $this->maxWidth / $width; $newWidth = $this->maxWidth; $newHeight = ceil($percent * $height); if($this->type == "exact"){ //crop the image from the middle $startx = 0; $starty = ($newHeight-$this->maxHeight)/2 / $percent; } if($newHeight < $this->maxHeight){ //by width $percent = $this->maxHeight / $height; $newHeight = $this->maxHeight; $newWidth = ceil($percent * $width); if($this->type == "exact"){ //crop the image from the middle $startx = ($newWidth - $this->maxWidth) /2 / $percent; //the startx is related to big image $starty = 0; } } //resize the picture: $tmp_img = ImageCreateTrueColor($newWidth,$newHeight); $this->handleTransparency($tmp_img,$imgType,$newWidth,$newHeight); imagecopyresampled($tmp_img,$src_img,0,0,$startx,$starty,$newWidth,$newHeight,$width,$height); $this->handleImageEffects($tmp_img); //crop the picture: $dst_img = ImageCreateTrueColor($this->maxWidth,$this->maxHeight); $this->handleTransparency($dst_img,$imgType,$this->maxWidth,$this->maxHeight); imagecopy($dst_img, $tmp_img, 0, 0, 0, 0, $newWidth, $newHeight); //save the picture $is_saved = $this->saveGdImage($dst_img,$filepathNew,$imgType); imagedestroy($dst_img); imagedestroy($src_img); imagedestroy($tmp_img); return($is_saved); } //------------------------------------------------------------------------------------------ // if the images are png or gif - handle image transparency private function handleTransparency(&$dst_img,$imgType,$newWidth,$newHeight){ //handle transparency: if($imgType == IMAGETYPE_PNG || $imgType == IMAGETYPE_GIF){ imagealphablending($dst_img, false); imagesavealpha($dst_img,true); $transparent = imagecolorallocatealpha($dst_img, 255, 255, 255, 127); imagefilledrectangle($dst_img, 0, 0, $newWidth, $newHeight, $transparent); } } //------------------------------------------------------------------------------------------ // handle image effects private function handleImageEffects(&$imgHandle){ if(empty($this->effect)) return(false); switch($this->effect){ case self::EFFECT_BW: if(defined("IMG_FILTER_GRAYSCALE")) imagefilter($imgHandle,IMG_FILTER_GRAYSCALE); break; case self::EFFECT_BRIGHTNESS: if(defined("IMG_FILTER_BRIGHTNESS")){ if(!is_numeric($this->effect_arg1)) $this->effect_arg1 = 50; //set default value UniteFunctionsHCar::validateNumeric($this->effect_arg1,"'ea1' argument"); imagefilter($imgHandle,IMG_FILTER_BRIGHTNESS,$this->effect_arg1); } break; case self::EFFECT_CONTRAST: if(defined("IMG_FILTER_CONTRAST")){ if(!is_numeric($this->effect_arg1)) $this->effect_arg1 = -5; //set default value imagefilter($imgHandle,IMG_FILTER_CONTRAST,$this->effect_arg1); } break; case self::EFFECT_EDGE: if(defined("IMG_FILTER_EDGEDETECT")) imagefilter($imgHandle,IMG_FILTER_EDGEDETECT); break; case self::EFFECT_EMBOSS: if(defined("IMG_FILTER_EMBOSS")) imagefilter($imgHandle,IMG_FILTER_EMBOSS); break; case self::EFFECT_BLUR: if(defined("IMG_FILTER_GAUSSIAN_BLUR")) imagefilter($imgHandle,IMG_FILTER_GAUSSIAN_BLUR); break; case self::EFFECT_MEAN: if(defined("IMG_FILTER_MEAN_REMOVAL")) imagefilter($imgHandle,IMG_FILTER_MEAN_REMOVAL); break; case self::EFFECT_SMOOTH: if(defined("IMG_FILTER_SMOOTH")){ if(!is_numeric($this->effect_arg1)) $this->effect_arg1 = 15; //set default value imagefilter($imgHandle,IMG_FILTER_SMOOTH,$this->effect_arg1); } break; default: $this->throwError("Effect not supported: {$this->effect}"); break; } } //------------------------------------------------------------------------------------------ // resize image and save it to new path private function resizeImageSaveNew($filepath,$filepathNew){ $imgInfo = getimagesize($filepath); $imgType = $imgInfo[2]; $src_img = $this->getGdSrcImage($filepath,$imgType); $width = imageSX($src_img); $height = imageSY($src_img); $newWidth = $width; $newHeight = $height; //find new width if($height > $this->maxHeight){ $procent = $this->maxHeight / $height; $newWidth = ceil($width * $procent); $newHeight = $this->maxHeight; } //if the new width is grater than max width, find new height, and remain the width. if($newWidth > $this->maxWidth){ $procent = $this->maxWidth / $newWidth; $newHeight = ceil($newHeight * $procent); $newWidth = $this->maxWidth; } //if the image don't need to be resized, just copy it from source to destanation. if($newWidth == $width && $newHeight == $height && empty($this->effect)){ $success = copy($filepath,$filepathNew); if($success == false) $this->throwError("can't copy the image from one path to another"); } else{ //else create the resized image, and save it to new path: $dst_img = ImageCreateTrueColor($newWidth,$newHeight); $this->handleTransparency($dst_img,$imgType,$newWidth,$newHeight); //copy the new resampled image: imagecopyresampled($dst_img,$src_img,0,0,0,0,$newWidth,$newHeight,$width,$height); $this->handleImageEffects($dst_img); $is_saved = $this->saveGdImage($dst_img,$filepathNew,$imgType); imagedestroy($dst_img); } imagedestroy($src_img); return(true); } /** * * set image effect */ public function setEffect($effect,$arg1 = ""){ $this->effect = $effect; $this->effect_arg1 = $arg1; } //------------------------------------------------------------------------------------------ //return image private function showImage($filename,$maxWidth=-1,$maxHeight=-1,$type=""){ if(empty($filename)) $this->throwError("image filename not found"); //validate input if($type == self::TYPE_EXACT || $type == self::TYPE_EXACT_TOP){ if($maxHeight == -1) $this->throwError("image with exact type must have height!"); if($maxWidth == -1) $this->throwError("image with exact type must have width!"); } $filepath = $this->pathImages.$filename; if(!is_file($filepath)){ if(!empty($this->pathEmptyImage)) $filepath = $this->pathEmptyImage; } if(!is_file($filepath)) $this->outputEmptyImageCode(); //if gd library doesn't exists - output normal image without resizing. if(function_exists("gd_info") == false) $this->throwError("php must support GD Library"); //check conditions for output original image if(empty($this->effect)){ if((is_numeric($maxWidth) == false || is_numeric($maxHeight) == false)) outputImage($filepath); if($maxWidth == -1 && $maxHeight == -1) $this->outputImage($filepath); } if($maxWidth == -1) $maxWidth = 1000000; if($maxHeight == -1) $maxHeight = 100000; //init variables $this->filename = $filename; $this->maxWidth = $maxWidth; $this->maxHeight = $maxHeight; $this->type = $type; $filepathNew = $this->getThumbFilepath(); if(is_file($filepathNew)){ $this->outputImage($filepathNew); exit(); } try{ if($type == self::TYPE_EXACT || $type == self::TYPE_EXACT_TOP){ $isSaved = $this->cropImageSaveNew($filepath,$filepathNew); } else $isSaved = $this->resizeImageSaveNew($filepath,$filepathNew); if($isSaved == false){ $this->outputImage($filepath); exit(); } }catch(Exception $e){ $this->outputImage($filepath); } if(is_file($filepathNew)) $this->outputImage($filepathNew); else $this->outputImage($filepath); exit(); } /** * * show some error messag */ private function showError(){ echo "error ocurred"; exit(); } /** * * validate filename if it's not some error */ private function validateFilename($filename){ //protections: if(strpos($filename, "images/") !== 0) $this->showError(); $info = pathinfo($filename); $extension = UniteFunctionsHCar::getVal($info, "extension"); $extension = strtolower($extension); switch($extension){ case "jpg": case "jpeg": case "png": case "gif": break; default: $this->showError(); break; } } /** * * show image from get params */ public function showImageFromGet(){ $imageFilename = UniteFunctionsHCar::getGetVar("img"); $noencode = UniteFunctionsHCar::getGetVar("noencode",""); if($noencode != "true") $imageFilename = base64_decode($imageFilename); $this->validateFilename($imageFilename); $maxWidth = UniteFunctionsHCar::getGetVar("w",-1); $maxHeight = UniteFunctionsHCar::getGetVar("h",-1); $type = UniteFunctionsHCar::getGetVar("t",""); //set effect $effect = UniteFunctionsHCar::getGetVar("e"); $effectArgument1 = UniteFunctionsHCar::getGetVar("ea1"); if(!empty($effect)) $this->setEffect($effect,$effectArgument1); $this->showImage($imageFilename,$maxWidth,$maxHeight,$type); } //------------------------------------------------------------------------------------------ // download image, change size and name if needed. public function downloadImage($filename){ $filepath = $this->urlImages."/".$filename; if(!is_file($filepath)) { echo "file doesn't exists"; exit(); } $this->outputImageForDownload($filepath,$filename); } //------------------------------------------------------------------------------------------ // output image for downloading private function outputImageForDownload($filepath,$filename,$mimeType=""){ $contents = file_get_contents($filepath); $filesize = strlen($contents); if($mimeType == ""){ $info = UniteFunctionsHCar::getPathInfo($filepath); $ext = $info["extension"]; $mimeType = "image/$ext"; } header("Content-Type: $mimeType"); header("Content-Disposition: attachment; filename=\"$filename\""); header("Content-Length: $filesize"); echo $contents; exit(); } /** * * validate type * @param unknown_type $type */ public function validateType($type){ switch($type){ case self::TYPE_EXACT: case self::TYPE_EXACT_TOP: break; default: $this->throwError("Wrong image type: ".$type); break; } } } ?>