www.gusucode.com > 仿新版阿里百秀织梦模板源码程序 > 仿新版阿里百秀织梦模板/include/imagecrop.class.php

    <?php

class ImageCrop{
	
	var $sImage;
	var $dImage;
	var $src_file;
	var $dst_file;
	var $src_width;
	var $src_height;
	var $src_ext;
	var $src_type;
	
	function ImageCrop($src_file,$dst_file=''){
		$this->src_file=DEDEROOT.$src_file;
		$this->dst_file=DEDEROOT.$dst_file;
		//echo $this->dst_file."123";
		$this->LoadImage();
	}
	function SetSrcFile($src_file){
		$this->src_file=$src_file;
	}
	function SetDstFile($dst_file){
		$this->dst_file=$dst_file;
	}
	function LoadImage(){
		list($this->src_width, $this->src_height, $this->src_type) = getimagesize($this->src_file);
		
	switch($this->src_type) {	
		case IMAGETYPE_JPEG :
			$this->sImage=imagecreatefromjpeg($this->src_file);
			$this->ext='jpg';				
		break;
		case IMAGETYPE_PNG :
			$this->sImage=imagecreatefrompng($this->src_file);
			$this->ext='png';
		break;
		case IMAGETYPE_GIF :
			$this->sImage=imagecreatefromgif($this->src_file);
			$this->ext='gif';
		break;
		default:
			echo "error";
		exit();
	}
	}
	
	function SaveImage($fileName=''){
		$this->dst_file=$fileName ? $fileName : $this->dst_file;
		switch($this->src_type) {
		case IMAGETYPE_JPEG :
			imagejpeg($this->dImage,$this->dst_file,100);
		break;
		case IMAGETYPE_PNG :
			imagepng($this->dImage,$this->dst_file);
		break;
		case IMAGETYPE_GIF :
			imagegif($this->dImage,$this->dst_file);
		break;
		default:
		break;
	}
	}
	
	function OutImage(){
	switch($this->src_type) {
	case IMAGETYPE_JPEG :
	header('Content-type: image/jpeg');
	imagejpeg($this->dImage);
	break;
	case IMAGETYPE_PNG :
	header('Content-type: image/png');
	imagepng($this->dImage);
	break;
	case IMAGETYPE_GIF :
	header('Content-type: image/gif');
	imagegif($this->dImage);
	break;
	default:
	break;
	}
	}
	
	function SaveAlpha($fileName=''){
	$this->dst_file=$fileName ? $fileName . '.png' : $this->dst_file .'.png';
	imagesavealpha($this->dImage, true);
	imagepng($this->dImage,$this->dst_file);
	}
	
	function OutAlpha(){
	imagesavealpha($this->dImage, true);
	header('Content-type: image/png');
	imagepng($this->dImage);
	}   
	
	function destory(){
	imagedestroy($this->sImage);
	imagedestroy($this->dImage);
	}
	
	function Crop($dst_width,$dst_height,$mode=1,$dst_file=''){
	if($dst_file) $this->dst_file=$dst_file;
	$this->dImage = imagecreatetruecolor($dst_width,$dst_height);
	
	$bg = imagecolorallocatealpha($this->dImage,255,255,255,127);
	imagefill($this->dImage, 0, 0, $bg);
	imagecolortransparent($this->dImage,$bg);
	
	$ratio_w=1.0 * $dst_width / $this->src_width;
	$ratio_h=1.0 * $dst_height / $this->src_height;
	$ratio=1.0;


	if( ($ratio_w < 1 && $ratio_h < 1) || ($ratio_w > 1 && $ratio_h > 1)){
		$ratio = $ratio_w < $ratio_h ? $ratio_h : $ratio_w;
		$tmp_w = (int)($dst_width / $ratio);
		$tmp_h = (int)($dst_height / $ratio);
		$tmp_img=imagecreatetruecolor($tmp_w , $tmp_h);
		$src_x = (int) (($this->src_width-$tmp_w)/2);
		$src_y = (int) (($this->src_height-$tmp_h)/2); 
		imagecopy($tmp_img, $this->sImage, 0,0,$src_x,$src_y,$tmp_w,$tmp_h);   
		imagecopyresampled($this->dImage,$tmp_img,0,0,0,0,$dst_width,$dst_height,$tmp_w,$tmp_h);
		imagedestroy($tmp_img);
	}else{
		$ratio = $ratio_w < $ratio_h ? $ratio_h : $ratio_w;
		$tmp_w = (int)($this->src_width * $ratio);
		$tmp_h = (int)($this->src_height * $ratio);
		$tmp_img=imagecreatetruecolor($tmp_w ,$tmp_h);
		imagecopyresampled($tmp_img,$this->sImage,0,0,0,0,$tmp_w,$tmp_h,$this->src_width,$this->src_height);
		$src_x = (int)($tmp_w - $dst_width) / 2;
		$src_y = (int)($tmp_h - $dst_height / 2);   
		imagecopy($this->dImage, $tmp_img, 0,0,$src_x,$src_y,$dst_width,$dst_height);
		imagedestroy($tmp_img);
	}


	}// end Crop
	
	
	}