image.class.php

Phpcms2008 是一款基于 PHP+Mysql 架构的网站内容管理系统

<?php 
class image
{
	var $w_pct = 100;
	var $w_quality = 80;
	var $w_minwidth = 300;
	var $w_minheight = 300;
	var $thumb_enable;
	var $watermark_enable;
	var $interlace = 0;

    function __construct()
    {
		global $PHPCMS;
		$this->thumb_enable = $PHPCMS['thumb_enable'];
		$this->watermark_enable = $PHPCMS['watermark_enable'];
		$this->set($PHPCMS['watermark_minwidth'], $PHPCMS['watermark_minheight'], $PHPCMS['watermark_quality'], $PHPCMS['watermark_pct']);
    }

	function image()
	{
		$this->__construct();
	}

	function set($w_minwidth = 300, $w_minheight = 300, $w_quality = 80, $w_pct = 100)
	{
		$this->w_minwidth = $w_minwidth;
		$this->w_minheight = $w_minheight;
		$this->w_quality = $w_quality;
		$this->w_pct = $w_pct;
	}

    function info($img) 
	{
        $imageinfo = getimagesize($img);
        if($imageinfo === false) return false;
		$imagetype = strtolower(substr(image_type_to_extension($imageinfo[2]),1));
		$imagesize = filesize($img);
		$info = array(
				'width'=>$imageinfo[0],
				'height'=>$imageinfo[1],
				'type'=>$imagetype,
				'size'=>$imagesize,
				'mime'=>$imageinfo['mime']
				);
		return $info;
    }

    function thumb($image, $filename = '', $maxwidth = 200, $maxheight = 50, $suffix='_thumb', $autocut = 0) 
    {
		if(!$this->thumb_enable || !$this->check($image)) return false;
        $info  = image::info($image);
        if($info === false) return false;
		$srcwidth  = $info['width'];
		$srcheight = $info['height'];
		$pathinfo = pathinfo($image);
		$type =  $pathinfo['extension'];
		if(!$type) $type = $info['type'];
		$type = strtolower($type);
		unset($info);
		
		$scale = min($maxwidth/$srcwidth, $maxheight/$srcheight);
		$createwidth = $width  = (int)($srcwidth*$scale);
		$createheight = $height = (int)($srcheight*$scale);
		if($maxwidth >= $srcwidth) $createwidth = $width = $srcwidth;
		if($maxheight >= $srcheight) $createheight = $height = $srcheight;
		$psrc_x = $psrc_y = 0;
		if($autocut)
		{
			if($maxwidth/$maxheight<$srcwidth/$srcheight && $maxheight>=$height)
			{
				$width = $maxheight/$height*$width;
				$height = $maxheight;
			}
			elseif($maxwidth/$maxheight>$srcwidth/$srcheight && $maxwidth>=$width)
			{
				$height = $maxwidth/$width*$height;
				$width = $maxwidth;
			}
			$createwidth = $maxwidth;
			$createheight = $maxheight;
		}
		$createfun = 'imagecreatefrom'.($type=='jpg' ? 'jpeg' : $type);
		$srcimg = $createfun($image);
		if($type != 'gif' && function_exists('imagecreatetruecolor'))
			$thumbimg = imagecreatetruecolor($createwidth, $createheight); 
		else
			$thumbimg = imagecreate($width, $height); 

		if(function_exists('imagecopyresampled'))
			imagecopyresampled($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $width, $height, $srcwidth, $srcheight); 
		else
			imagecopyresized($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $width, $height,  $srcwidth, $srcheight); 
		if($type=='gif' || $type=='png')
		{
			$background_color  =  imagecolorallocate($thumbimg,  0, 255, 0);  //  鎸囨淳涓