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PHP添加水印后,图像变全黑,请高手指教!

程序员文章站 2022-05-10 21:30:31
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//嵌入水印程序, 文字水印和图片水印请分别添加!!!function setWater($imgSrc,$markImg,$markText,$TextColor,$markPos,$fontType,$markType,$fontSize){	/*参数说明:$imgSrc:目标图片,可带相对目录地址,$markImg:水印图片,可带相对目录地址,支持PNG和GIF两种格式,如水印图片在执行文件mark目录下,可写成:mark/mark.gif$markText:给图片添加的水印文字$TextColor:水印文字的字体颜色$markPos:图片水印添加的位置,取值范围:0~90:随机位置,在1~8之间随机选取一个位置1:顶部居左 2:顶部居中 3:顶部居右 4:左边居中5:图片中心 6:右边居中 7:底部居左 8:底部居中 9:底部居右$fontType:具体的字体库,可带相对目录地址$markType:图片添加水印的方式,img代表以图片方式,text代表以文字方式添加水印*/    $srcInfo = @getimagesize($imgSrc);    $srcImg_w    = $srcInfo[0];    $srcImg_h    = $srcInfo[1];     switch ($srcInfo[2])     {         case 1:             $srcim =@imagecreatefromgif($imgSrc); 			if($srcim==false)					echo "打开失败!";            break;         case 2: 		    //header("Content-Type: image/jpeg");            $srcim =@imagecreatefromjpeg($imgSrc); 				//print_r("hi, i am jpg file");			//imagejpeg($srcim);	        /*imagejpeg($srcim,"temp.jpg");			?> PHP添加水印后,图像变全黑,请高手指教! */						if($srcim==false)					echo "打开失败!";            break;         case 3:             $srcim =@imagecreatefrompng($imgSrc); 			if($srcim==false)					echo "打开失败!";            break;         default:             die("不支持的图片文件类型");             exit;     }    		    if(!strcmp($markType,"img"))    {		//print_r(" hello ! img");        if(!file_exists($markImg) || empty($markImg))        {            return;        }                    $markImgInfo = @getimagesize($markImg);        $markImg_w    = $markImgInfo[0];        $markImg_h    = $markImgInfo[1];                    if($srcImg_w  the markimginfo is");        //print_r($markImgInfo[2]);        switch ($markImgInfo[2])         {             case 1:                 $markim =@imagecreatefromgif($markImg); 				if($markim==false)					echo "打开失败!";                break;             case 2:                 $markim =@imagecreatefromjpeg($markImg); 				if($markim==false)					echo "打开失败!";                break;             case 3:                 $markim =@imagecreatefrompng($markImg); 				if($markim==false)					echo "打开失败!";                break;             default:                 die("不支持的水印图片文件类型");                 exit;         }                    $logow = $markImg_w;        $logoh = $markImg_h;    }            if(!strcmp($markType,"text"))    {		//print_r(" hello ! text");        //$fontSize = 86;  //middle        if(!empty($markText))        {			//print_r($fontType);            if(!file_exists($fontType))            {				//print_r(" hello ! no fonttype");                return;            }        }        else 		{			//print_r(" hello ! no marktext");            return;        }            	    //print_r(" hello ! i am before imagettfbbox");        $box = imagettfbbox($fontSize, 0, $fontType,$markText);		//print_r(" hello ! i am after imagettfbbox");        $logow = max($box[2], $box[4]) - min($box[0], $box[6]);        $logoh = max($box[1], $box[3]) - min($box[5], $box[7]);    }            if($markPos == 0)    {        $markPos = rand(1, 9);    }            switch($markPos)    {        case 1:                    $x = +25;            $y = +125;            break;        case 2:            $x = ($srcImg_w - $logow) / 2;            $y = +5;            break;        case 3:            $x = $srcImg_w - $logow - 135;            $y = +115;            break;        case 4:            $x = +5;            $y = ($srcImg_h - $logoh) / 2;            break;        case 5:		   // print_r(" hello !  I AM AT 5");            $x = ($srcImg_w - $logow) / 2;            $y = ($srcImg_h - $logoh) / 2;            break;        case 6:		   // print_r(" hello !  I AM AT 6");            $x = $srcImg_w - $logow - 5;            $y = ($srcImg_h - $logoh) / 2;            break;        case 7:            $x = +25;            $y = $srcImg_h - $logoh - 115;            break;        case 8:            $x = ($srcImg_w - $logow) / 2;            $y = $srcImg_h - $logoh - 5;            break;        case 9:		    //print_r(" Hi, i am at markpos  9 ");            $x = $srcImg_w - $logow - 5;            $y = $srcImg_h - $logoh -5;            break;        default:             die("此位置不支持");             exit;    }     /*   print_r(" hello i am before imagecreatetruecolor!");    	print_r($srcImg_w);		print_r($srcImg_h);*/    $dst_img=@imagecreatetruecolor($srcImg_w, $srcImg_h); //建立空白背景,真彩色图片	//$color = imagecolorAllocate($img,200,200,200);   //分配一个灰色    //imagefill($img,0,0,$color);                 // 从左上角开始填充灰色	$trans_colour = imagecolorallocatealpha($dst_img, 0, 0, 0, 127); //透明图片    imagefill($dst_img, 0, 0, $trans_colour); 	//$dst_img=imagecreate($srcImg_w, $srcImg_h);	/*print_r($dst_img);       print_r(" hello i am after imagecreatetruecolor!!"); */    imagecopy ( $dst_img, $srcim, 0, 0, 0, 0, $srcImg_w, $srcImg_h);    //print_r(" hello!");    if(!strcmp($markType,"img"))    {        imagecopy($dst_img, $markim, $x, $y, 0, 0, $logow, $logoh);        imagedestroy($markim);    }            if(!strcmp($markType,"text"))    {		//print_r(" hello ! text2");        $rgb = explode(',', $TextColor);        $color = imagecolorallocate($dst_img, $rgb[0], $rgb[1], $rgb[2]);        imagettftext($dst_img, $fontSize, 0, $x, $y, $color, $fontType,$markText);    }           switch ($srcInfo[2])     {         case 1:            imagegif($dst_img, $imgSrc);             break;         case 2: 		    //print_r("hello!");            imagejpeg($dst_img, $imgSrc,97);  //bool imagejpeg ( resource image [, string filename [, int quality]] ) quality 是imagejpeg独有的参数(0~100),默认是75,0是最差,文件最小,100是最佳,文件最大。            break;         case 3:             imagepng($dst_img, $imgSrc);             break;        default:             die("不支持的水印图片文件类型");             exit;     }    /*	$marked_img="";	switch ($srcInfo[2])     {         case 1:            imagegif($dst_img, $marked_img);             break;         case 2: 		    //print_r("hello!");            imagejpeg($dst_img, $marked_img);             break;         case 3:             imagepng($dst_img, $marked_img);             break;        default:             die("不支持的水印图片文件类型");             exit;     }*/    imagedestroy($dst_img);    imagedestroy($srcim);	//return  $marked_img;}


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