[7.5+版] 帝国CMS缩略图函数改进（GD库改进）

帝国CMS缩略图函数改进（GD库改进）
本文关键字词：缩略图，缩略图函数，帝国CMS，帝国CMS，帝国CMS缩略图去黑边框
第一种方式 帝国默认：
sys_ResizeImg($r[titlepic],宽,高,0);//帝国默认的不裁剪缩放生成缩略图的方式
第二种方式 帝国默认：
sys_ResizeImg($r[titlepic],宽,高,1);//帝国默认的裁剪缩放生成缩略图的方式
第三种方式 去掉裁剪不够时的黑边并且从图片缩放后中间裁剪：
sys_ResizeImg($r[titlepic],宽,高,2);//新加去黑边裁剪生成缩略图的方式
第四种方式 只固定图片的宽，高度不限制（类似不规则瀑布流的图片形式），高填写为大于0的任意整数数字：
sys_ResizeImg($r[titlepic],宽,高,3);//新加去黑边生成类似瀑布流格式的方式

前台调用方式如下<?=sys_ResizeImg($r[titlepic],宽,高,3) ?>
/e/class/gd.php 函数全部代码如下：

<?phpdefine('InEmpireCMSGd',TRUE);
//原文件,新文件,宽度,高度,维持比例functionResizeImage($big_image_name,$new_name,$max_width=400,$max_height=400,$resize=1){$returnr['file']='';$returnr['filetype']='';if($temp_img_type=@getimagesize($big_image_name)){preg_match('/\/([a-z]+)$/i',$temp_img_type[mime],$tpn);$img_type=$tpn[1];}else{preg_match('/\.([a-z]+)$/i',$big_image_name,$tpn);$img_type=$tpn[1];}$all_type=array("jpg"=>array("create"=>"ImageCreateFromjpeg","output"=>"imagejpeg","exn"=>".jpg"),"gif"=>array("create"=>"ImageCreateFromGIF","output"=>"imagegif","exn"=>".gif"),"jpeg"=>array("create"=>"ImageCreateFromjpeg","output"=>"imagejpeg","exn"=>".jpg"),"png"=>array("create"=>"imagecreatefrompng","output"=>"imagepng","exn"=>".png"),"wbmp"=>array("create"=>"imagecreatefromwbmp","output"=>"image2wbmp","exn"=>".wbmp"));
$func_create=$all_type[$img_type]['create'];if(empty($func_create)or!function_exists($func_create)){return$returnr;}//输出$func_output=$all_type[$img_type]['output'];$func_exname=$all_type[$img_type]['exn'];if(($func_exname=='.gif'||$func_exname=='.png'||
$func_exname=='.wbmp')&&!function_exists($func_output)){$func_output='imagejpeg';$func_exname='.jpg';}$big_image=$func_create($big_image_name);$big_width=imagesx($big_image);$big_height=imagesy($big_image);if($big_width<=$max_widthand$big_height<=$max_height){$func_output($big_image,$new_name.$func_exname);$returnr['file']=$new_name.$func_exname;$returnr['filetype']=$func_exname;return$returnr;}$ratiow=$max_width/$big_width;$ratioh=$max_height/$big_height;$new_width=($ratiow>1)?$big_width:$max_width;$new_height=($ratioh>1)?$big_height:$max_height;if($resize==1){if($big_width>=$max_widthand$big_height>=$max_height){if($big_width>$big_height){$tempx=$max_width/$ratioh;$tempy=$big_height;$srcX=($big_width-$tempx)/2;$srcY=0;}else{$tempy=$max_height/$ratiow;$tempx=$big_width;$srcY=($big_height-$tempy)/2;$srcX=0;}}else{if($big_width>$big_height){$tempx=$max_width;$tempy=$big_height;$srcX=($big_width-$tempx)/2;$srcY=0;}else{$tempy=$max_height;$tempx=$big_width;$srcY=($big_height-$tempy)/2;$srcX=0;}}}elseif($resize==2){//同比例缩放超出裁切
if($big_width>=$max_widthand$big_height>=$max_height){if($max_width>=($big_width*$ratioh)){$tempx=$big_width;$tempy=$max_height/$ratiow;$srcX=0;$srcY=($big_height-$tempy)/2;}elseif($max_height>=($big_height*$ratiow)){$tempx=$max_width/$ratioh;$tempy=$big_height;$srcX=($big_width-$tempx)/2;$srcY=0;}else{$tempx=$max_width;$tempy=$big_height;$srcX=($big_width-$tempx)/2;$srcY=0;}}else{if($max_height>=$big_height){$tempx=$max_width;$tempy=$big_height;$srcX=($big_width-$max_width)/2;$srcY=0;}elseif($max_width>=$big_width){$tempx=$big_width;$tempy=$max_height;$srcX=0;$srcY=($big_height-$max_height)/2;}}}elseif($resize==3){//宽度固定高度同比例任意$srcX=0;$srcY=0;$tempx=$big_width;$tempy=$big_height;if($big_width>=$max_width){$new_height=$big_height*$ratiow;}else{$new_height=$big_height;}}else{//不保持比例$srcX=0;$srcY=0;$tempx=$big_width;$tempy=$big_height;}if(function_exists("imagecopyresampled")){$temp_image=imagecreatetruecolor($new_width,$new_height);//echo$tempx;exit;imagecopyresampled($temp_image,$big_image,0,0,$srcX,$srcY,$new_width,$new_height,$tempx,$tempy);}else{$temp_image=imagecreate($new_width,$new_height);imagecopyresized($temp_image,$big_image,0,0,$srcX,$srcY,$new_width,$new_height,$tempx,$tempy);}/*增加高质量输出图像*/$zhiliang=$func_exname=='.png'?9:100;$func_output($temp_image,$new_name.$func_exname,$zhiliang);//$func_output($temp_image,$new_name.$func_exname);ImageDestroy($big_image);ImageDestroy($temp_image);$returnr['file']=$new_name.$func_exname;$returnr['filetype']=$func_exname;return$returnr;}
/**功能：图片加水印(水印支持图片或文字)*参数：*$groundImage背景图片，即需要加水印的图片，暂只支持GIF,JPG,PNG格式；*$waterPos水印位置，有10种状态，0为随机位置；*1为顶端居左，2为顶端居中，3为顶端居右；*4为中部居左，5为中部居中，6为中部居右；*7为底端居左，8为底端居中，9为底端居右；*$waterImage图片水印，即作为水印的图片，暂只支持GIF,JPG,PNG格式；*$waterText文字水印，即把文字作为为水印，支持ASCII码，不支持中文；*$textFont文字大小，值为1、2、3、4或5，默认为5；*$textColor文字颜色，值为十六进制颜色值，默认为#FF0000(红色)；**注意：SupportGD2.0，SupportFreeType、GIFRead、GIFCreate、JPG、PNG*$waterImage和$waterText最好不要同时使用，选其中之一即可，优先使用$waterImage。*当$waterImage有效时，参数$waterString、$stringFont、$stringColor均不生效。*加水印后的图片的文件名和$groundImage一样。*/functionimageWaterMark($groundImage,$waterPos=0,$waterImage="",$waterText="",$textFont=5,$textColor="#FF0000",$myfontpath="../data/mask/cour.ttf",$w_pct,$w_quality){global$fun_r,$editor;if($editor==1){$a='../';}elseif($editor==2){$a='../../';}elseif($editor==3){$a='../../../';}else{$a='';}$waterImage=$waterImage?$a.$waterImage:'';$myfontpath=$myfontpath?$a.$myfontpath:'';$isWaterImage=FALSE;$formatMsg=$fun_r['synotdotype'];
//读取水印文件if(!empty($waterImage)&&file_exists($waterImage)){$isWaterImage=TRUE;$water_info=getimagesize($waterImage);$water_w=$water_info[0];//取得水印图片的宽$water_h=$water_info[1];//取得水印图片的高
switch($water_info[2]){//取得水印图片的格式case1:$water_im=imagecreatefromgif($waterImage);break;case2:$water_im=imagecreatefromjpeg($waterImage);break;case3:$water_im=imagecreatefrompng($waterImage);break;default:echo$formatMsg;return"";}}
//读取背景图片if(!empty($groundImage)&&file_exists($groundImage)){$ground_info=getimagesize($groundImage);$ground_w=$ground_info[0];//取得背景图片的宽$ground_h=$ground_info[1];//取得背景图片的高
switch($ground_info[2]){//取得背景图片的格式case1:$ground_im=imagecreatefromgif($groundImage);break;case2:$ground_im=imagecreatefromjpeg($groundImage);break;case3:$ground_im=imagecreatefrompng($groundImage);break;default:echo$formatMsg;return"";}}else{echo$fun_r['synotdoimg'];return"";}
//水印位置if($isWaterImage){//图片水印$w=$water_w;$h=$water_h;$label="图片的";}else{//文字水印$temp=imagettfbbox(ceil($textFont*2.5),0,$myfontpath,$waterText);//取得使用TrueType字体的文本的范围$w=$temp[2]-$temp[6];$h=$temp[3]-$temp[7];unset($temp);$label="文字区域";}if(($ground_w<$w)||($ground_h<$h)){echo$fun_r['sytoosmall'];return'';}switch($waterPos){case0://随机$posX=rand(0,($ground_w-$w));$posY=rand(0,($ground_h-$h));break;case1://1为顶端居左$posX=0;$posY=0;break;case2://2为顶端居中$posX=($ground_w-$w)/2;$posY=0;break;case3://3为顶端居右$posX=$ground_w-$w;$posY=0;break;case4://4为中部居左$posX=0;$posY=($ground_h-$h)/2;break;case5://5为中部居中$posX=($ground_w-$w)/2;$posY=($ground_h-$h)/2;break;case6://6为中部居右$posX=$ground_w-$w;$posY=($ground_h-$h)/2;break;case7://7为底端居左$posX=0;$posY=$ground_h-$h;break;case8://8为底端居中$posX=($ground_w-$w)/2;$posY=$ground_h-$h;break;case9://9为底端居右$posX=$ground_w-$w;$posY=$ground_h-$h;break;default://随机$posX=rand(0,($ground_w-$w));$posY=rand(0,($ground_h-$h));break;}
//设定图像的混色模式imagealphablending($ground_im,true);
if($isWaterImage){//图片水印if($water_info[2]==3){imagecopy($ground_im,$water_im,$posX,$posY,0,0,$water_w,$water_h);//拷贝水印到目标文件}else{imagecopymerge($ground_im,$water_im,$posX,$posY,0,0,$water_w,$water_h,$w_pct);//拷贝水印到目标文件}}else{//文字水印if(!empty($textColor)&&(strlen($textColor)==7)){$R=hexdec(substr($textColor,1,2));$G=hexdec(substr($textColor,3,2));$B=hexdec(substr($textColor,5));}else{echo$fun_r['synotfontcolor'];return"";}imagestring($ground_im,$textFont,$posX,$posY,$waterText,imagecolorallocate($ground_im,$R,$G,$B));}
//生成水印后的图片@unlink($groundImage);switch($ground_info[2]){//取得背景图片的格式case1:imagegif($ground_im,$groundImage);break;case2:imagejpeg($ground_im,$groundImage,$w_quality);break;case3:imagepng($ground_im,$groundImage);break;default:echo$formatMsg;return"";}
//释放内存if(isset($water_info))unset($water_info);if(isset($water_im))imagedestroy($water_im);unset($ground_info);imagedestroy($ground_im);}?>