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Version 1.2.8 Image Management
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Sebastian
325
system/Models/ProcessImage.php
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325
system/Models/ProcessImage.php
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<?php
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namespace Typemill\Models;
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class ProcessImage
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{
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public function createImage(string $image, array $desiredSizes, $name)
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{
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# fix error from jpeg-library
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ini_set ('gd.jpeg_ignore_warning', 1);
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error_reporting(E_ALL & ~E_NOTICE);
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# clear temporary folder
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$this->clearTempFolder();
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# decode the image from base64-string
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$imageDecoded = $this->decodeImage($image);
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$imageData = $imageDecoded["image"];
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$imageType = $imageDecoded["type"];
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# transform image-stream into image
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$image = imagecreatefromstring($imageData);
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# get the size of the original image
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$imageSize = $this->getImageSize($image);
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# check the desired sizes and calculate the height, if not set
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$desiredSizes = $this->setHeight($imageSize, $desiredSizes);
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# resize the images
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$resizedImages = $this->imageResize($image, $imageSize, $desiredSizes, $imageType);
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$basePath = getcwd() . DIRECTORY_SEPARATOR . 'media';
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$tmpFolder = $basePath . DIRECTORY_SEPARATOR . 'tmp' . DIRECTORY_SEPARATOR;
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$this->saveOriginal($tmpFolder, $imageData, 'original', $imageType);
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if($imageType == "gif" && $this->detectAnimatedGif($imageData))
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{
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$this->saveOriginal($tmpFolder, $imageData, 'live', $imageType);
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return true;
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}
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# temporary store resized images
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foreach($resizedImages as $key => $resizedImage)
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{
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$this->saveImage($tmpFolder, $resizedImage, $key, $imageType);
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}
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return true;
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}
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public function detectAnimatedGif($image_file_contents)
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{
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$is_animated = preg_match('#(\x00\x21\xF9\x04.{4}\x00\x2C.*){2,}#s', $image_file_contents);
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if ($is_animated == 1)
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{
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return true;
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}
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return false;
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}
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public function publishImage(array $desiredSizes)
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{
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/* get images from tmp folder */
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$basePath = getcwd() . DIRECTORY_SEPARATOR . 'media';
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$tmpFolder = $basePath . DIRECTORY_SEPARATOR . 'tmp' . DIRECTORY_SEPARATOR;
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$originalFolder = $basePath . DIRECTORY_SEPARATOR . 'original' . DIRECTORY_SEPARATOR;
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$liveFolder = $basePath . DIRECTORY_SEPARATOR . 'live' . DIRECTORY_SEPARATOR;
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$name = uniqid();
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$files = scandir($tmpFolder);
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$success = true;
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foreach($files as $file)
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{
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if (!in_array($file, array(".","..")))
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{
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$tmpfilename = explode(".", $file);
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if($tmpfilename[0] == 'original')
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{
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$success = rename($tmpFolder . $file, $originalFolder . $name . '-' . $file);
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}
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else
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{
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$success = rename($tmpFolder . $file, $liveFolder . $name . '-' . $file);
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}
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}
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}
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if($success)
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{
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return 'media/live/' . $name . '-live.' . $tmpfilename[1];
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}
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return false;
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}
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public function decodeImage(string $image)
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{
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$imageParts = explode(";base64,", $image);
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$imageType = explode("/", $imageParts[0]);
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$imageData = base64_decode($imageParts[1]);
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if ($imageData !== false)
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{
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return array("image" => $imageData, "type" => $imageType[1]);
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}
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return false;
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}
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public function getImageSize($image)
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{
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$width = imagesx($image);
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$height = imagesy($image);
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return array('width' => $width, 'height' => $height);
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}
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public function setHeight(array $imageSize, array $desiredSizes)
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{
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foreach($desiredSizes as $key => $desiredSize)
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{
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if($desiredSize['width'] > $imageSize['width'])
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{
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$desiredSizes[$key] = $imageSize;
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continue;
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}
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if(!isset($desiredSize['height']))
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{
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$resizeFactor = $imageSize['width'] / $desiredSize['width'];
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$desiredSizes[$key]['height'] = round( ($imageSize['height'] / $resizeFactor), 0);
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}
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}
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return $desiredSizes;
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}
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public function imageResize($imageData, array $imageSize, array $desiredSizes, $imageType)
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{
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$copiedImages = array();
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$source_aspect_ratio = $imageSize['width'] / $imageSize['height'];
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#check transparency
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$transparent_index = false;
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if ($imageType = ("png" || "gif"))
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{
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$transparent_index = imagecolortransparent($imageData);
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}
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foreach($desiredSizes as $key => $desiredSize)
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{
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$desired_aspect_ratio = $desiredSize['width'] / $desiredSize['height'];
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if ( $source_aspect_ratio > $desired_aspect_ratio )
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{
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# when source image is wider
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$temp_height = $desiredSize['height'];
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$temp_width = ( int ) ($desiredSize['height'] * $source_aspect_ratio);
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$temp_width = round($temp_width, 0);
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}
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else
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{
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# when source image is similar or taller
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$temp_width = $desiredSize['width'];
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$temp_height = ( int ) ($desiredSize['width'] / $source_aspect_ratio);
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$temp_height = round($temp_height, 0);
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}
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# Create a temporary GD image with desired size
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$temp_gdim = imagecreatetruecolor( $temp_width, $temp_height );
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if ($transparent_index >= 0 && $imageType == "gif")
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{
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imagepalettecopy($imageData, $temp_gdim);
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imagefill($temp_gdim, 0, 0, $transparent_index);
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imagecolortransparent($temp_gdim, $transparent_index);
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imagetruecolortopalette($temp_gdim, true, 256);
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}
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elseif($transparent_index >= 0 && $imageType == "png")
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{
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imagealphablending($temp_gdim, false);
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imagesavealpha($temp_gdim,true);
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$transparent = imagecolorallocatealpha($temp_gdim, 255, 255, 255, 127);
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imagefilledrectangle($temp_gdim, 0, 0, $temp_width, $temp_height, $transparent);
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}
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imagecopyresampled(
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$temp_gdim,
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$imageData,
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0, 0,
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0, 0,
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$temp_width, $temp_height,
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$imageSize['width'], $imageSize['height']
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);
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# Copy cropped region from temporary image into the desired GD image
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$x0 = ( $temp_width - $desiredSize['width'] ) / 2;
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$y0 = ( $temp_height - $desiredSize['height'] ) / 2;
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$desired_gdim = imagecreatetruecolor( $desiredSize['width'], $desiredSize['height'] );
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if ($transparent_index >= 0 && $imageType == "gif")
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{
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# GIF
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imagepalettecopy($imageData, $desired_gdim);
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imagefill($desired_gdim, 0, 0, $transparent_index);
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imagecolortransparent($desired_gdim, $transparent_index);
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imagetruecolortopalette($desired_gdim, true, 256);
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}
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if ($transparent_index >= 0 && $imageType == "png")
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{
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imagealphablending($desired_gdim, false);
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imagesavealpha($desired_gdim,true);
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$transparent = imagecolorallocatealpha($desired_gdim, 255, 255, 255, 127);
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imagefilledrectangle($desired_gdim, 0, 0, $desiredSize['width'], $desiredSize['height'], $transparent);
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}
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imagecopy(
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$desired_gdim,
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$temp_gdim,
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0, 0,
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$x0, $y0,
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$desiredSize['width'], $desiredSize['height']
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);
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$copiedImages[$key] = $desired_gdim;
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}
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return $copiedImages;
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}
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public function saveOriginal($folder, $image, $name, $type)
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{
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if(!file_exists($folder))
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{
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mkdir($folder, 0774, true);
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}
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$path = $folder . $name . '.' . $type;
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file_put_contents($path, $image);
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}
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public function saveImage($folder, $image, $name, $type)
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{
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if(!file_exists($folder))
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{
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mkdir($folder, 0774, true);
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}
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if($type == "png")
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{
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$result = imagepng( $image, $folder . '/' . $name . '.png' );
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}
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elseif($type == "gif")
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{
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$result = imagegif( $image, $folder . '/' . $name . '.gif' );
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}
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else
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{
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$result = imagejpeg( $image, $folder . '/' . $name . '.jpeg' );
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$type = 'jpeg';
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}
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imagedestroy($image);
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if($result)
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{
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return $name . '.' . $type;
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}
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return false;
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}
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public function clearTempFolder()
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{
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$folder = getcwd() . DIRECTORY_SEPARATOR . 'media' . DIRECTORY_SEPARATOR . 'tmp' . DIRECTORY_SEPARATOR;
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$files = scandir($folder);
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$result = true;
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foreach($files as $file)
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{
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if (!in_array($file, array(".","..")))
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{
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$filelink = $folder . $file;
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if(!unlink($filelink))
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{
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$success = false;
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}
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}
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}
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return $result;
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}
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public function deleteImage($name)
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{
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$baseFolder = getcwd() . DIRECTORY_SEPARATOR . 'media' . DIRECTORY_SEPARATOR;
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$original = $baseFolder . 'original' . DIRECTORY_SEPARATOR . $name . '*';
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$live = $baseFolder . 'live' . DIRECTORY_SEPARATOR . $name . '*';
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$success = true;
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foreach(glob($original) as $image)
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{
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if(!unlink($image))
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{
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$success = false;
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}
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}
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foreach(glob($live) as $image)
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{
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if(!unlink($image))
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{
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$success = false;
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}
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}
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return $success;
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}
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}
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?>
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