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| <?php |
| |
| /** |
| * Thumbnail class. |
| * |
| * @author Tamlyn Rhodes <tam at zenology dot co dot uk> |
| * @license http://opensource.org/licenses/gpl-license.php GNU General Public License |
| * @copyright (c)2003-2005 Tamlyn Rhodes |
| * @version $Id: thumbnail.class.php,v 1.13 2006/06/24 20:33:00 tamlyn Exp $ |
| */ |
| |
| |
| /** |
| * Creates and manages image thumbnails |
| * @package singapore |
| * @author Tamlyn Rhodes <tam at zenology dot co dot uk> |
| * @copyright (c)2003-2005 Tamlyn Rhodes |
| */ |
| class sgThumbnail |
| { |
| var $config; |
| var $maxWidth = 0; |
| var $maxHeight = 0; |
| var $thumbWidth = 0; |
| var $thumbHeight = 0; |
| var $cropWidth = 0; |
| var $cropHeight = 0; |
| var $forceSize = false; |
| var $imagePath = ""; |
| var $thumbPath = ""; |
| |
| function sgThumbnail(&$img, $type) |
| { |
| $this->config =& sgConfig::getInstance(); |
| $this->image =& $img; |
| |
| $widthVar = "thumb_width_".$type; |
| $heightVar = "thumb_height_".$type; |
| $cropVar = "thumb_crop_".$type; |
| $this->maxWidth = $this->config->$widthVar; |
| $this->maxHeight = $this->config->$heightVar; |
| if(isset($this->config->$cropVar)) |
| $this->forceSize = $this->config->$cropVar; |
| |
| if($this->image == null) return; |
| |
| $this->imagePath = $this->image->realPath(); |
| $this->thumbPath = $this->config->base_path.Singapore::thumbnailPath($this->image->parent->id, $this->image->id, $this->maxWidth, $this->maxHeight, $this->forceSize); |
| $this->thumbURL = $this->config->base_url .Singapore::thumbnailPath($this->image->parent->id, $this->image->id, $this->maxWidth, $this->maxHeight, $this->forceSize); |
| |
| //security check: make sure requested file is in galleries directory |
| if(!Singapore::isSubPath($this->config->base_path.$this->config->pathto_galleries, $this->imagePath) && !$this->image->isRemote()) |
| return; |
| |
| //security check: make sure $image has a valid extension |
| if(!$this->image->isRemote() && !preg_match("/.+\.(".$this->config->recognised_extensions.")$/i",$this->image->id)) |
| return; |
| |
| $this->calculateDimensions(); |
| |
| //link straight to image if it smaller than required size |
| if($this->image->width <= $this->thumbWidth && $this->image->height <= $this->thumbHeight) { |
| $this->thumbURL = $this->image->realURL(); |
| return; |
| } |
| |
| $imageModified = @filemtime($this->imagePath); |
| $thumbModified = @filemtime($this->thumbPath); |
| |
| if($imageModified > $thumbModified || !$thumbModified) |
| $this->buildThumbnail(); |
| } |
| |
| /** Accessor methods */ |
| function width() { return $this->thumbWidth; } |
| function height() { return $this->thumbHeight; } |
| function URL() { return $this->thumbURL; } |
| |
| /** Private methods */ |
| |
| /** |
| * Calculates thumbnail dimensions. |
| */ |
| function calculateDimensions() |
| { |
| //if aspect ratio is to be constrained set crop size |
| if($this->forceSize) { |
| $newAspect = $this->maxWidth/$this->maxHeight; |
| $oldAspect = $this->image->realWidth()/$this->image->realHeight(); |
| if($newAspect > $oldAspect) { |
| $this->cropWidth = $this->image->realWidth(); |
| $this->cropHeight = round($this->image->realHeight()*($oldAspect/$newAspect)); |
| } else { |
| $this->cropWidth = round($this->image->realWidth()*($newAspect/$oldAspect)); |
| $this->cropHeight = $this->image->realHeight(); |
| } |
| //else crop size is image size |
| } else { |
| $this->cropWidth = $this->image->realWidth(); |
| $this->cropHeight = $this->image->realHeight(); |
| } |
| |
| if($this->cropHeight > $this->maxHeight && ($this->cropWidth <= $this->maxWidth |
| || ($this->cropWidth > $this->maxWidth && round($this->cropHeight/$this->cropWidth * $this->maxWidth) > $this->maxHeight))) { |
| $this->thumbWidth = round($this->cropWidth/$this->cropHeight * $this->maxHeight); |
| $this->thumbHeight = $this->maxHeight; |
| } elseif($this->cropWidth > $this->maxWidth) { |
| $this->thumbWidth = $this->maxWidth; |
| $this->thumbHeight = round($this->cropHeight/$this->cropWidth * $this->maxWidth); |
| } else { |
| $this->thumbWidth = $this->image->realWidth(); |
| $this->thumbHeight = $this->image->realHeight(); |
| } |
| } |
| |
| function buildThumbnail() { |
| //set cropping offset |
| $cropX = floor(($this->image->width-$this->cropWidth)/2); |
| $cropY = floor(($this->image->height-$this->cropHeight)/2); |
| |
| //check thumbs directory exists and create it if not |
| if(!file_exists(dirname($this->thumbPath))) |
| Singapore::mkdir(dirname($this->thumbPath)); |
| |
| //if file is remote then copy locally first |
| if($this->image->isRemote()) { |
| $ip = @fopen($this->imagePath, "rb"); |
| $tp = @fopen($this->thumbPath, "wb"); |
| if($ip && $tp) { |
| while(fwrite($tp,fread($ip, 4095))); |
| fclose($tp); |
| fclose($ip); |
| $this->imagePath = $this->thumbPath; |
| } |
| } |
| |
| switch($this->config->thumbnail_software) { |
| case "im" : //use ImageMagick v5.x |
| $cmd = '"'.$this->config->pathto_convert.'"'; |
| if($this->forceSize) $cmd .= " -crop {$this->cropWidth}x{$this->cropHeight}+{$this->cropX}+{$this->cropY}"; |
| $cmd .= " -geometry {$this->thumbWidth}x{$this->thumbHeight}"; |
| if($this->image->type == 2) $cmd .= " -quality ".$this->config->thumbnail_quality; |
| if($this->config->progressive_thumbs) $cmd .= " -interlace Plane"; |
| if($this->config->remove_jpeg_profile) $cmd .= ' +profile "*"'; |
| $cmd .= ' '.escapeshellarg($this->imagePath).' '.escapeshellarg($this->thumbPath); |
| |
| exec($cmd); |
| |
| break; |
| case "im6" : //use ImageMagick v6.x |
| $cmd = '"'.$this->config->pathto_convert.'"'; |
| $cmd .= ' '.escapeshellarg($this->imagePath); |
| if($this->config->progressive_thumbs) $cmd .= " -interlace Plane"; |
| if($this->image->type == 2) $cmd .= " -quality ".$this->config->thumbnail_quality; |
| if($this->forceSize) $cmd .= " -crop {$this->cropWidth}x{$this->cropHeight}+{$this->cropX}+{$this->cropY}"; |
| $cmd .= " -resize {$this->thumbWidth}x{$this->thumbHeight}"; |
| if($this->config->remove_jpeg_profile) $cmd .= ' +profile "*"'; |
| $cmd .= ' '.escapeshellarg($this->thumbPath); |
| |
| exec($cmd); |
| |
| break; |
| case "gd2" : |
| case "gd1" : |
| default : //use GD by default |
| //read in image as appropriate type |
| switch($this->image->type) { |
| case 1 : $image = ImageCreateFromGIF($this->imagePath); break; |
| case 3 : $image = ImageCreateFromPNG($this->imagePath); break; |
| case 2 : |
| default: $image = ImageCreateFromJPEG($this->imagePath); break; |
| } |
| |
| if($image) { |
| switch($this->config->thumbnail_software) { |
| case "gd2" : |
| //create blank truecolor image |
| $thumb = ImageCreateTrueColor($this->thumbWidth,$this->thumbHeight); |
| //resize image with resampling |
| ImageCopyResampled( |
| $thumb, $image, |
| 0, 0, $cropX, $cropY, |
| $this->thumbWidth, $this->thumbHeight, $this->cropWidth, $this->cropHeight); |
| break; |
| case "gd1" : |
| default : |
| //create blank 256 color image |
| $thumb = ImageCreate($this->thumbWidth,$this->thumbHeight); |
| //resize image |
| ImageCopyResized( |
| $thumb, $image, |
| 0, 0, $cropX, $cropY, |
| $this->thumbWidth, $this->thumbHeight, $this->cropWidth, $this->cropHeight); |
| break; |
| } |
| } /*else { |
| $thumb = ImageCreate($this->thumbWidth, $this->thumbHeight); |
| $bg = ImageColorAllocate($thumb, 255, 255, 255); |
| $text = ImageColorAllocate($thumb, 255, 0, 0); |
| ImageString($thumb, 1, 0, 0, "Cannot load source image", $text); |
| }*/ |
| |
| //set image interlacing |
| @ImageInterlace($thumb, $this->config->progressive_thumbs); |
| |
| //output image of appropriate type |
| switch($this->image->type) { |
| case 1 : |
| //GIF images are saved as PNG |
| case 3 : |
| ImagePNG($thumb, $this->thumbPath); |
| break; |
| case 2 : |
| default: |
| ImageJPEG($thumb, $this->thumbPath, $this->config->thumbnail_quality); |
| break; |
| } |
| @ImageDestroy($image); |
| @ImageDestroy($thumb); |
| } |
| |
| //set file permissions on newly created thumbnail |
| @chmod($this->thumbPath, octdec($this->config->file_mode)); |
| } |
| |
| } |
| |
| ?> |