/fwoq/core/libs/img_engine/image_gd.php

<?php
/**
 * $Id: image_gd.php 228 2011-09-19 03:39:11Z lingter@gmail.com $
 * 
 * @author : Lingter
 * @support : http://www.meiu.cn
 * @copyright : (c)2010 meiu.cn lingter@gmail.com
 */

class image_gd {
    /**
     * ??????
     *
     * @var image
     */
    var $image;

    /**
     * ????
     *
     * @var imagetype
     */
    var $image_type;
    
    var $image_quality=90;

    var $true_color = false;
    
    /**
     * ????
     *
     * @param string $filename ??????
     * @return void
     */
    function load($filename) {
        $image_info = getimagesize($filename);
        $this->image_type = $image_info[2];
        if( $this->image_type == IMAGETYPE_JPEG ) {
            $this->image = imagecreatefromjpeg($filename);
        } elseif( $this->image_type == IMAGETYPE_GIF ) {
            $this->image = imagecreatefromgif($filename);
        } elseif( $this->image_type == IMAGETYPE_PNG ) {
            $this->image = imagecreatefrompng($filename);
        }else{
            return false;
        }
        if(function_exists("imagecopyresampled") && function_exists("imagecreatetruecolor") && $this->image_type != IMAGETYPE_GIF){
            $this->true_color = true;
        }
        return true;
    }
    
    function supportType(){
        return array('jpg','jpeg','gif','png');
    }
    
    function setQuality($q){
        if($q>0)
            $this->image_quality = $q;
    }
    /**
     * ?????
     * 
     * @return string ???
     */
    function getExtension(){
        if( $this->image_type == IMAGETYPE_JPEG ) return 'jpg';
        elseif( $this->image_type == IMAGETYPE_GIF ) return 'gif';
        elseif( $this->image_type == IMAGETYPE_PNG ) return 'png';
    }

    /**
     * ??????????
     *
     * @param string $filename ???
     * @param int $image_type ????
     * return volid
     */
    function save($filename) {
        $image_type = $this->image_type;
        if( $image_type == IMAGETYPE_JPEG ) {
            imagejpeg($this->image,$filename,$this->image_quality);
        } elseif( $image_type == IMAGETYPE_GIF ) {
            imagegif($this->image,$filename);
        } elseif( $image_type == IMAGETYPE_PNG ) {
            imagepng($this->image,$filename);
        }

    }
    
    /**
     * ?????????
     *
     * @param int $image_type ????
     * @return void
     */
    function output() {
        $image_type = $this->image_type;
        if( $image_type == IMAGETYPE_JPEG ) {
            header('Content-Type: image/jpeg');
            imagejpeg($this->image,NULL,$this->image_quality);
        } elseif( $image_type == IMAGETYPE_GIF ) {
            header('Content-type: image/gif');
            imagegif($this->image);
        } elseif( $image_type == IMAGETYPE_PNG ) {
            header('Content-type: image/png');
            imagepng($this->image);
        }
    }

    /**
     * ??????
     *
     * @return int ????
     */
    function getWidth() {
        return imagesx($this->image);
    }

    /**
     * ??????
     *
     * @return int ????
     */
    function getHeight() {
        return imagesy($this->image);
    }

    /**
     * ??????????
     * 
     * @param int $height ????
     */
    function resizeToHeight($height) {
        $ratio = $height / $this->getHeight();
        $width = $this->getWidth() * $ratio;
        $this->resize($width,$height);
    }

    /**
     * ???????
     * 
     * @param int $w ????
     * @param int $h ????
     */
    function resizeTo($w=0, $h=0) {
        if($w>0 && $h>0) return $this->resize($w,$h);
        else if($w>0) return $this->resizeToWidth($w);
        else if($h>0) return $this->resizeToHeight($h);
    }
    /**
     * ???????????
     * @param int $w ????
      * @param int $h ????
     */
    function resizeScale($w=0,$h=0){
        if($w == 0 && $h>0){
            return $this->resizeToHeight($h);
        }
        if($h == 0 && $w>0){
            return $this->resizeToWidth($w);
        }
        if($w == 0 && $h==0){
            return false;
        }
        $maxwidth = $w;
        $maxheight = $h;
        
        $width = $this->getWidth();
        $height = $this->getHeight();
        
        $RESIZEWIDTH = $RESIZEHEIGHT = false;
        if($maxwidth && $width > $maxwidth){
            $widthratio = $maxwidth/$width;
            $RESIZEWIDTH=true;
        }
        if($maxheight && $height > $maxheight){
            $heightratio = $maxheight/$height;
            $RESIZEHEIGHT=true;
        }
        if($RESIZEWIDTH && $RESIZEHEIGHT){
            if($widthratio < $heightratio){
                return $this->resizeToWidth($w);
            }else{
                return $this->resizeToHeight($h);
            }
        }elseif($RESIZEWIDTH){
            return $this->resizeToWidth($w);
        }elseif($RESIZEHEIGHT){
            return $this->resizeToHeight($h);
        }
    }
    /**
     * ????????????????
     * 
     * @param int $v ????/??
     */
    function square($v){
        $width = $this->getWidth();
        $height = $this->getHeight();
        $left = 0;
        $top = 0;
        if($width>$height){
            $this->resizeToHeight($v);
            $left = ceil(($v/$height * $width - $v)/2); 
        }else{
            $this->resizeToWidth($v);
            $top = ceil(($v/$width * $height - $v)/2); 
        }
        $this->cut($v,$v,$left,$top);
    }
    /**
     * ??????????
     * 
     * @param int $width ????
     */
    function resizeToWidth($width) {
        if($width>=$this->getWidth()) return;
        $ratio = $width / $this->getWidth();
        $height = $this->getHeight() * $ratio;
        $this->resize($width,$height);
    }

    /**
     * ???????????
     * 
     * @param int $scale ????
     */
    function scale($scale) {
        $width = $this->getWidth() * $scale/100;
        $height = $this->getHeight() * $scale/100;
        $this->resize($width,$height);
    }

    /**
     * ??????
     * 
     * @param int $width ????
     * @param int $height ????
     */
    function resize($width,$height) {
        if($this->true_color){
            $newim = imagecreatetruecolor($width, $height);
            imagecopyresampled($newim, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
        }else{
            $newim = imagecreate($width, $height);
            imagecopyresized($newim, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
        }
        $this->image = $newim;
    }

    /**
     * ????
     *
     * @param int $width ????
     * @param int $height ????
     */
    function cut($width,$height,$left = 0,$top = 0){
        if($this->true_color){
            $new_image = imagecreatetruecolor($width, $height);
        }else{
            $new_image = imagecreate($width, $height);
        }
        imagecopy($new_image, $this->image, 0, 0, $left, $top, $width, $height);
        $this->image = $new_image;
    }

    /**
     * ?????????????????
     *
     * @param int $top ????
     * @param int $height ????
     */
    function vcut($top,$height){
        $width = $this->getWidth();
        $height = $this->getHeight()-$top+$height;
        if($height<200) return;
        if($this->true_color){
            $new_image = imagecreatetruecolor($width, $height);
        }else{
            $new_image = imagecreate($width, $height);
        }
        imagecopy($new_image, $this->image, 0, 0, 0, $top, $width, $height);
        $this->image = $new_image;
    }
    
    /*
    ????
    */
    function rotate($dgree){
        $tran = imagecolortransparent($this->image,NULL);
        $new_image = imagerotate($this->image, $dgree , $tran);
        $this->image = $new_image;
    }
    
    function waterMarkSetting($param){
        $this->param = $param;
    }
    
    function waterMarkImg(){
        if(empty($this->param['water_mark_image']) || !file_exists($this->param['water_mark_image'])){
            return false;
        }
    
        $water_info = getimagesize($this->param['water_mark_image']);
        $w = $water_info[0];//????????
        $h = $water_info[1];//????????
        switch($water_info[2])//?????????
        {
            case 1:$water_im = imagecreatefromgif($this->param['water_mark_image']);break;
            case 2:$water_im = imagecreatefromjpeg($this->param['water_mark_image']);break;
            case 3:$water_im = imagecreatefrompng($this->param['water_mark_image']);break;
            default:return false;
        }
        $ground_w = $this->getWidth();
        $ground_h = $this->getHeight();
    
        if( $ground_w<$w || $ground_h<$h ){
            return false;
        }
        switch($this->param['water_mark_pos'])
        {
            case 0://??
            $posX = rand(5,($ground_w - $w - 5));
            $posY = rand(5,($ground_h - $h - 5));
            break;
            case 1://1?????
            $posX = 5;
            $posY = 5;
            break;
            case 2://2?????
            $posX = ($ground_w - $w) / 2;
            $posY = 5;
            break;
            case 3://3?????
            $posX = $ground_w - $w -5;
            $posY = 5;
            break;
            case 4://4?????
            $posX = 5;
            $posY = ($ground_h - $h) / 2;
            break;
            case 5://5?????
            $posX = ($ground_w - $w) / 2;
            $posY = ($ground_h - $h) / 2;
            break;
            case 6://6?????
            $posX = $ground_w - $w - 5;
            $posY = ($ground_h - $h) / 2;
            break;
            case 7://7?????
            $posX = 5;
            $posY = $ground_h - $h - 5;
            break;
            case 8://8?????
            $posX = ($ground_w - $w) / 2;
            $posY = $ground_h - $h - 5;
            break;
            case 9://9?????
            $posX = $ground_w - $w - 5;
            $posY = $ground_h - $h - 5;
            break;
            default://??
            $posX = rand(5,($ground_w - $w - 5));
            $posY = rand(5,($ground_h - $h - 5));
            break;
        }
        //?????????
        imagealphablending($this->image, true);
        if(function_exists('imagecopymerge') && $this->param['water_mark_opacity'] != 0){
            @imagecopymerge($this->image, $water_im, $posX, $posY, 0, 0, $w,$h,$this->param['water_mark_opacity']);
        }else{
            imagecopy($this->image, $water_im, $posX, $posY, 0, 0, $w,$h);//?????????
        }
        imagedestroy($water_im);
    }
    
    function waterMarkFont(){
        if($this->param['water_mark_color']){
            $color = $this->param['water_mark_color'];
        }else{
            $color = '#000000';
        }
        $r = hexdec( substr( $color, 1, 2 ) );
        $g = hexdec( substr( $color, 3, 2 ) );
        $b = hexdec( substr( $color, 5, 2 ) );
        
        if($this->param['water_mark_opacity']>0 && $this->param['water_mark_opacity']<100){
            $fontcolor = imagecolorallocatealpha( $this->image, $r, $g, $b ,$this->param['water_mark_opacity']);
        }else{
            $fontcolor = imagecolorallocate( $this->image, $r, $g, $b );
        }
        
        $box = ImageTTFBBox(
            $this->param['water_mark_fontsize'],
            $this->param['water_mark_angle'],
            $this->param['water_mark_font'],
            $this->param['water_mark_string']);
        $ground_w = $this->getWidth();
        $ground_h = $this->getHeight();
        $h = max($box[1], $box[3]) - min($box[5], $box[7]);
        $w = max($box[2], $box[4]) - min($box[0], $box[6]);
        $ax = min($box[0], $box[6]) * -1;
        $ay = min($box[5], $box[7]) * -1;
        switch($this->param['water_mark_pos'])
        {
            case 0://??
            $posX = rand(5,($ground_w - $w - 5));
            $posY = rand(5,($ground_h - $h - 5));
            break;
            case 1://1?????
            $posX = 5;
            $posY = 5;
            break;
            case 2://2?????
            $posX = ($ground_w - $w) / 2;
            $posY = 5;
            break;
            case 3://3?????
            $posX = $ground_w - $w -5;
            $posY = 5;
            break;
            case 4://4?????
            $posX = 5;
            $posY = ($ground_h - $h) / 2;
            break;
            case 5://5?????
            $posX = ($ground_w - $w) / 2;
            $posY = ($ground_h - $h) / 2;
            break;
            case 6://6?????
            $posX = $ground_w - $w - 5;
            $posY = ($ground_h - $h) / 2;
            break;
            case 7://7?????
            $posX = 5;
            $posY = $ground_h - $h - 5;
            break;
            case 8://8?????
            $posX = ($ground_w - $w) / 2;
            $posY = $ground_h - $h - 5;
            break;
            case 9://9?????
            $posX = $ground_w - $w - 5;
            $posY = $ground_h - $h - 5;
            break;
            default://??
            $posX = rand(5,($ground_w - $w - 5));
            $posY = rand(5,($ground_h - $h - 5));
            break;
        }
        /*if($this->param['water_mark_shadow'] == 'gray'){
            $shadowcolor = imagecolorallocate( $this->image, 160, 160, 160 );
            imagettftext($this->image,
                 $this->param['water_mark_fontsize'],
                 $this->param['water_mark_angle'],
                 $posX + $ax+1,
                 $posY + $ay+1,
                 $shadowcolor,
                 $this->param['water_mark_font'],
                 $this->param['water_mark_string']);
        }elseif($this->param['water_mark_shadow'] == 'white'){
            $shadowcolor = imagecolorallocate( $this->image, 255, 255, 255 );
            imagettftext($this->image,
                 $this->param['water_mark_fontsize'],
                 $this->param['water_mark_angle'],
                 $posX + $ax + 1,
                 $posY + $ay + 1,
                 $shadowcolor,
                 $this->param['water_mark_font'],
                 $this->param['water_mark_string']);
        }*/
        
        imagettftext($this->image,
             $this->param['water_mark_fontsize'],
             $this->param['water_mark_angle'],
             $posX + $ax,
             $posY + $ay,
             $fontcolor,
             $this->param['water_mark_font'],
             $this->param['water_mark_string']);
    }
    
    function waterMark(){
        //??????
        if($this->param['water_mark_type'] == 'image'){
            $this->waterMarkImg();
        }elseif($this->param['water_mark_type'] == 'font'){
            $this->watermarkFont();
        }
        return false;
    }
}