functions.image.php

php 开发的内容管理系统

<?php
// $Id: functions.php,v 1.3 2005/10/19 17:20:33 phppp Exp $
//  ------------------------------------------------------------------------ //
//                XOOPS - PHP Content Management System                      //
//                    Copyright (c) 2000 XOOPS.org                           //
//                       <http://www.xoops.org/>                             //
//  ------------------------------------------------------------------------ //
//  This program is free software; you can redistribute it and/or modify     //
//  it under the terms of the GNU General Public License as published by     //
//  the Free Software Foundation; either version 2 of the License, or        //
//  (at your option) any later version.                                      //
//                                                                           //
//  You may not change or alter any portion of this comment or credits       //
//  of supporting developers from this source code or any supporting         //
//  source code which is considered copyrighted (c) material of the          //
//  original comment or credit authors.                                      //
//                                                                           //
//  This program is distributed in the hope that it will be useful,          //
//  but WITHOUT ANY WARRANTY; without even the implied warranty of           //
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the            //
//  GNU General Public License for more details.                             //
//                                                                           //
//  You should have received a copy of the GNU General Public License        //
//  along with this program; if not, write to the Free Software              //
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA //
//  ------------------------------------------------------------------------ //
//  Author: phppp (D.J., [e-mail])                                  //
//  URL: http://xoopsforge.com, http://xoops.org.cn                          //
//  Project: Article Project                                                 //
//  ------------------------------------------------------------------------ //

if(!defined("NEWBB_FUNCTIONS_IMAGE")):
define("NEWBB_FUNCTIONS_IMAGE", true);

function newbb_attachmentImage($source)
{
	global $xoopsModuleConfig;

	$img_path = XOOPS_ROOT_PATH.'/'.$xoopsModuleConfig['dir_attachments'];
	$img_url = XOOPS_URL.'/'.$xoopsModuleConfig['dir_attachments'];
	$thumb_path = $img_path.'/thumbs';
	$thumb_url = $img_url.'/thumbs';

	$thumb = $thumb_path.'/'.$source;
	$image = $img_path.'/'.$source;
	$thumb_url = $thumb_url.'/'.$source;
	$image_url = $img_url.'/'.$source;

	$imginfo = @getimagesize($image);
	$img_info = ( count($imginfo)>0 )?$imginfo[0]."X".$imginfo[1].' px':"";

	if($xoopsModuleConfig['max_img_width']>0){
		if(
		( $xoopsModuleConfig['max_image_width']>0 && $imginfo[0]>$xoopsModuleConfig['max_image_width'] ) 
		|| 
		( $xoopsModuleConfig['max_image_height']>0 && $imginfo[1]>$xoopsModuleConfig['max_image_height'])
		){
			if($imginfo[0]>$xoopsModuleConfig['max_img_width']){
				$pseudo_width = $xoopsModuleConfig['max_img_width'];
				$pseudo_height = $xoopsModuleConfig['max_img_width']*($imginfo[1]/$imginfo[0]);
				$pseudo_size = "width='".$pseudo_width."px' height='".$pseudo_height."px'";
			}
			if($xoopsModuleConfig['max_image_height']>0 && $pseudo_height>$xoopsModuleConfig['max_image_height']){
				$pseudo_height = $xoopsModuleConfig['max_image_height'];
				$pseudo_width = $xoopsModuleConfig['max_image_height']*($imginfo[0]/$imginfo[1]);
				$pseudo_size = "width='".$pseudo_width."px' height='".$pseudo_height."px'";
			}
		}else
		if(!file_exists($thumb_path.'/'.$source) && $imginfo[0]>$xoopsModuleConfig['max_img_width']){
			newbb_createThumbnail($source, $xoopsModuleConfig['max_img_width']);
		}
	}


	if(file_exists($thumb)){
		$attachmentImage  = '<a href="'.$image_url.'" title="'.$source.' '.$img_info.'" target="newbb_image">';
		$attachmentImage .= '<img src="'.$thumb_url.'" alt="'.$source.' '.$img_info.'" />';
		$attachmentImage .= '</a>';
	}elseif(!empty($pseudo_size)){
		$attachmentImage  = '<a href="'.$image_url.'" title="'.$source.' '.$img_info.'" target="newbb_image">';
		$attachmentImage .= '<img src="'.$image_url.'" '.$pseudo_size.' alt="'.$source.' '.$img_info.'" />';
		$attachmentImage .= '</a>';
	}elseif(file_exists($image)){
		$attachmentImage = '<img src="'.$image_url.'" alt="'.$source.' '.$img_info.'" />';
	}else $attachmentImage = '';

	return $attachmentImage;
}


function newbb_createThumbnail($source, $thumb_width)
{
	global $xoopsModuleConfig;

	$img_path = XOOPS_ROOT_PATH.'/'.$xoopsModuleConfig['dir_attachments'];
	$thumb_path = $img_path.'/thumbs';
	$src_file = $img_path.'/'.$source;
	$new_file = $thumb_path.'/'.$source;
	//$imageLibs = newbb_getImageLibs();

	if (!filesize($src_file) || !is_readable($src_file)) {
		return false;
	}

	if (!is_dir($thumb_path) || !is_writable($thumb_path)) {
		return false;
	}

	$imginfo = @getimagesize($src_file);
	if ( NULL == $imginfo ) {
		return false;
	}
	if($imginfo[0] < $thumb_width) {
		return false;
	}

	$newWidth = (int)(min($imginfo[0],$thumb_width));
	$newHeight = (int)($imginfo[1] * $newWidth / $imginfo[0]);

	if ($xoopsModuleConfig['image_lib'] == 1 or $xoopsModuleConfig['image_lib'] == 0 )
	{
		if (preg_match("#[A-Z]:|\\\\#Ai",__FILE__)){
			$cur_dir = dirname(__FILE__);
			$src_file_im = '"'.$cur_dir.'\\'.strtr($src_file, '/', '\\').'"';
			$new_file_im = '"'.$cur_dir.'\\'.strtr($new_file, '/', '\\').'"';
		} else {
			$src_file_im =   @escapeshellarg($src_file);
			$new_file_im =   @escapeshellarg($new_file);
		}
		$path = empty($xoopsModuleConfig['path_magick'])?"":$xoopsModuleConfig['path_magick']."/";
		$magick_command = $path . 'convert -quality 85 -antialias -sample ' . $newWidth . 'x' . $newHeight . ' ' . $src_file_im . ' +profile "*" ' . str_replace('\\', '/', $new_file_im) . '';

		@passthru($magick_command);
		if (file_exists($new_file)){
				return true;
		}
	}

	if ($xoopsModuleConfig['image_lib'] == 2 or $xoopsModuleConfig['image_lib'] == 0 )
	{
		$path = empty($xoopsModuleConfig['path_netpbm'])?"":$xoopsModuleConfig['path_netpbm']."/";
		if (eregi("\.png", $source)){
			$cmd = $path . "pngtopnm $src_file | ".$path . "pnmscale -xysize $newWidth $newHeight | ".$path . "pnmtopng > $new_file" ;
		}
		else if (eregi("\.(jpg|jpeg)", $source)){
			$cmd = $path . "jpegtopnm $src_file | ".$path . "pnmscale -xysize $newWidth $newHeight | ".$path . "ppmtojpeg -quality=90 > $new_file" ;
		}
		else if (eregi("\.gif", $source)){
			$cmd = $path . "giftopnm $src_file | ".$path . "pnmscale -xysize $newWidth $newHeight | ppmquant 256 | ".$path . "ppmtogif > $new_file" ;
		}

		@exec($cmd, $output, $retval);
		if (file_exists($new_file)){
				return true;
		}
	}

	$type = $imginfo[2];
	$supported_types = array();

	if (!extension_loaded('gd')) return false;
	if (function_exists('imagegif')) $supported_types[] = 1;
	if (function_exists('imagejpeg'))$supported_types[] = 2;
	if (function_exists('imagepng')) $supported_types[] = 3;

    $imageCreateFunction = (function_exists('imagecreatetruecolor'))? "imagecreatetruecolor" : "imagecreate";

	if (in_array($type, $supported_types) )
	{
		switch ($type)
		{
			case 1 :
				if (!function_exists('imagecreatefromgif')) return false;
				$im = imagecreatefromgif($src_file);
				$new_im = imagecreate($newWidth, $newHeight);
				imagecopyresized($new_im, $im, 0, 0, 0, 0, $newWidth, $newHeight, $imginfo[0], $imginfo[1]);
				imagegif($new_im, $new_file);
				imagedestroy($im);
				imagedestroy($new_im);
				break;
			case 2 :
				$im = imagecreatefromjpeg($src_file);
				$new_im = $imageCreateFunction($newWidth, $newHeight);
				imagecopyresized($new_im, $im, 0, 0, 0, 0, $newWidth, $newHeight, $imginfo[0], $imginfo[1]);
				imagejpeg($new_im, $new_file, 90);
				imagedestroy($im);
				imagedestroy($new_im);
				break;
			case 3 :
				$im = imagecreatefrompng($src_file);
				$new_im = $imageCreateFunction($newWidth, $newHeight);
				imagecopyresized($new_im, $im, 0, 0, 0, 0, $newWidth, $newHeight, $imginfo[0], $imginfo[1]);
				imagepng($new_im, $new_file);
				imagedestroy($im);
				imagedestroy($new_im);
				break;
		}
	}


	if (file_exists($new_file))	return true;
	else return false;
}

endif;
?>