243 lines
8.1 KiB
PHP
243 lines
8.1 KiB
PHP
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<?php
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/*
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File: /app/controllers/components/image.php
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*/
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class ImageComponent extends Object
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{
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/* from http://sabbour.wordpress.com/2008/05/13/image-upload-and-resize-component-for-cakephp-12/
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* Uploads an image and its thumbnail into $folderName/big and $folderName/small respectivley.
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* the generated thumnail could either have the same aspect ratio as the uploaded image, or could
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* be a zoomed and cropped version.
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* Directions:
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* In view where you upload the image, make sure your form creation is similar to the following
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* <?= $form->create('FurnitureSet',array('type' => 'file')); ?>
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*
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* In view where you upload the image, make sure that you have a file input similar to the following
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* <?= $form->file('Image/name1'); ?>
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*
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* In the controller, add the component to your components array
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* var $components = array("Image");
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*
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* In your controller action (the parameters are expained below)
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* $image_path = $this->Image->upload_image_and_thumbnail($this->data,"name1",573,80,"sets",true);
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* this returns the file name of the result image. You can store this file name in the database
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*
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* Note that your image will be stored in 2 locations:
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* Image: /webroot/img/$folderName/big/$image_path
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* Thumbnail: /webroot/img/$folderName/small/$image_path
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*
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* Finally in the view where you want to see the images
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* <?= $html->image('sets/big/'.$furnitureSet['FurnitureSet']['image_path']);
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* where "sets" is the folder name we saved our pictures in, and $furnitureSet['FurnitureSet']['image_path'] is the file name we stored in the database
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* Parameters:
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* $data: CakePHP data array from the form
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* $datakey: key in the $data array. If you used <?= $form->file('Image/name1'); ?> in your view, then $datakey = name1
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* $imgscale: the maximum width or height that you want your picture to be resized to
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* $thumbscale: the maximum width or height that you want your thumbnail to be resized to
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* $folderName: the name of the parent folder of the images. The images will be stored to /webroot/img/$folderName/big/ and /webroot/img/$folderName/small/
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* $square: a boolean flag indicating whether you want square and zoom cropped thumbnails, or thumbnails with the same aspect ratio of the source image
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*/
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function upload_image_and_thumbnail($data, $datakey, $imgscale, $thumbscale, $folderName, $square) {
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if (strlen($data['Image'][$datakey]['name'])>4){
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$error = 0;
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$tempuploaddir = "img/temp"; // the /temp/ directory, should delete the image after we upload
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$biguploaddir = "img/".$folderName."/big"; // the /big/ directory
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$smalluploaddir = "img/".$folderName."/small"; // the /small/ directory for thumbnails
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// Make sure the required directories exist, and create them if necessary
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if(!is_dir($tempuploaddir)) mkdir($tempuploaddir,true);
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if(!is_dir($biguploaddir)) mkdir($biguploaddir,true);
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if(!is_dir($smalluploaddir)) mkdir($smalluploaddir,true);
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$filetype = $this->getFileExtension($data['Image'][$datakey]['name']);
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$filetype = strtolower($filetype);
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if (($filetype != "jpeg") && ($filetype != "jpg") && ($filetype != "gif") && ($filetype != "png"))
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{
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// verify the extension
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return;
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}
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else
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{
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// Get the image size
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$imgsize = GetImageSize($data['Image'][$datakey]['tmp_name']);
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}
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// Generate a unique name for the image (from the timestamp)
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$id_unic = str_replace(".", "", strtotime ("now"));
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$filename = $id_unic;
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settype($filename,"string");
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$filename.= ".";
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$filename.=$filetype;
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$tempfile = $tempuploaddir . "/$filename";
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$resizedfile = $biguploaddir . "/$filename";
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$croppedfile = $smalluploaddir . "/$filename";
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if (is_uploaded_file($data['Image'][$datakey]['tmp_name']))
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{
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// Copy the image into the temporary directory
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if (!copy($data['Image'][$datakey]['tmp_name'],"$tempfile"))
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{
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print "Error Uploading File!.";
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exit();
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}
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else {
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/*
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* Generate the big version of the image with max of $imgscale in either directions
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*/
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$this->resize_img($tempfile, $imgscale, $resizedfile);
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if($square) {
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/*
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* Generate the small square version of the image with scale of $thumbscale
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*/
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$this->crop_img($tempfile, $thumbscale, $croppedfile);
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}
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else {
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/*
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* Generate the big version of the image with max of $imgscale in either directions
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*/
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$this->resize_img($tempfile, $thumbscale, $croppedfile);
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}
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// Delete the temporary image
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unlink($tempfile);
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}
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}
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// Image uploaded, return the file name
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return $filename;
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}
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}
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/*
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* Deletes the image and its associated thumbnail
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* Example in controller action: $this->Image->delete_image("1210632285.jpg","sets");
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*
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* Parameters:
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* $filename: The file name of the image
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* $folderName: the name of the parent folder of the images. The images will be stored to /webroot/img/$folderName/big/ and /webroot/img/$folderName/small/
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*/
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function delete_image($filename,$folderName) {
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unlink("img/".$folderName."/big/".$filename);
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unlink("img/".$folderName."/small/".$filename);
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}
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function crop_img($imgname, $scale, $filename) {
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$filetype = $this->getFileExtension($imgname);
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$filetype = strtolower($filetype);
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switch($filetype){
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case "jpeg":
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case "jpg":
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$img_src = ImageCreateFromjpeg ($imgname);
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break;
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case "gif":
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$img_src = imagecreatefromgif ($imgname);
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break;
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case "png":
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$img_src = imagecreatefrompng ($imgname);
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break;
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}
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$width = imagesx($img_src);
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$height = imagesy($img_src);
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$ratiox = $width / $height * $scale;
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$ratioy = $height / $width * $scale;
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//-- Calculate resampling
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$newheight = ($width <= $height) ? $ratioy : $scale;
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$newwidth = ($width <= $height) ? $scale : $ratiox;
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//-- Calculate cropping (division by zero)
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$cropx = ($newwidth - $scale != 0) ? ($newwidth - $scale) / 2 : 0;
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$cropy = ($newheight - $scale != 0) ? ($newheight - $scale) / 2 : 0;
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//-- Setup Resample & Crop buffers
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$resampled = imagecreatetruecolor($newwidth, $newheight);
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$cropped = imagecreatetruecolor($scale, $scale);
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//-- Resample
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imagecopyresampled($resampled, $img_src, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
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//-- Crop
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imagecopy($cropped, $resampled, 0, 0, $cropx, $cropy, $newwidth, $newheight);
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// Save the cropped image
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switch($filetype)
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{
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case "jpeg":
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case "jpg":
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imagejpeg($cropped,$filename,80);
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break;
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case "gif":
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imagegif($cropped,$filename,80);
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break;
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case "png":
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imagepng($cropped,$filename,80);
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break;
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}
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}
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function resize_img($imgname, $size, $filename) {
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$filetype = $this->getFileExtension($imgname);
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$filetype = strtolower($filetype);
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switch($filetype) {
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case "jpeg":
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case "jpg":
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$img_src = ImageCreateFromjpeg ($imgname);
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break;
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case "gif":
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$img_src = imagecreatefromgif ($imgname);
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break;
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case "png":
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$img_src = imagecreatefrompng ($imgname);
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break;
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}
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$true_width = imagesx($img_src);
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$true_height = imagesy($img_src);
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if ($true_width>=$true_height)
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{
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$width=$size;
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$height = ($width/$true_width)*$true_height;
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}
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else
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{
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$width=$size;
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$height = ($width/$true_width)*$true_height;
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}
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$img_des = ImageCreateTrueColor($width,$height);
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imagecopyresampled ($img_des, $img_src, 0, 0, 0, 0, $width, $height, $true_width, $true_height);
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// Save the resized image
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switch($filetype)
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{
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case "jpeg":
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case "jpg":
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imagejpeg($img_des,$filename,80);
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break;
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case "gif":
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imagegif($img_des,$filename,80);
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break;
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case "png":
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imagepng($img_des,$filename,80);
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break;
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}
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}
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function getFileExtension($str) {
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$i = strrpos($str,".");
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if (!$i) { return ""; }
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$l = strlen($str) - $i;
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$ext = substr($str,$i+1,$l);
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return $ext;
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}
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} ?>
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