<?php
/**
 * @link      http://www.u-bo.com
 * @copyright 南京友博网络科技有限公司 
 * @license   http://www.u-bo.com/license/
 */

namespace common\components;

use Yii;

/**
 * 图像操作类库
 */
class Image 
{

	/**
	 * 取得图像信息
	 * @static
	 * @access public
	 * @param string $image 图像文件名
	 * @return mixed
	 */
	static function getImageInfo($img) {
		$imageInfo = getimagesize($img);
		if ($imageInfo !== 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;
		} else {
			return false;
		}
	}

	/**
	 * 为图片添加水印
	 * @static public
	 * @param string $source 原文件名
	 * @param string $water  水印图片
	 * @param string $$savename  添加水印后的图片名
	 * @param string $alpha  水印的透明度
	 * @return void
	 */
	static public function water($source, $water, $position, $savename = null, $alpha = 80) {
		//检查文件是否存在
		if (!file_exists($source) || !file_exists($water))
			return false;

		//图片信息
		$sInfo = self::getImageInfo($source);
		$wInfo = self::getImageInfo($water);

		//如果图片小于水印图片，不生成图片
		if ($sInfo["width"] < $wInfo["width"] || $sInfo['height'] < $wInfo['height'])
			return false;

		//建立图像
		$sCreateFun = "imagecreatefrom" . $sInfo['type'];
		$sImage = $sCreateFun($source);
		$wCreateFun = "imagecreatefrom" . $wInfo['type'];
		$wImage = $wCreateFun($water);

		//设定图像的混色模式
		imagealphablending($wImage, true);

		//图像位置,默认为右下角右对齐
		switch ($position) {
			case 1:
				$posY = $sInfo["height"] - $wInfo["height"];
				$posX = 0;
				break;
			case 2:
				$posY = $sInfo["height"] - $wInfo["height"];
				$posX = $sInfo["width"] / 2 - $wInfo["width"] / 2;
				break;
			case 3:
				$posY = $sInfo["height"] - $wInfo["height"];
				$posX = $sInfo["width"] - $wInfo["width"];
				break;
			case 4:
				$posY = $sInfo["height"] / 2 - $wInfo["height"] / 2;
				$posX = 0;
				break;
			case 5:
				$posY = $sInfo["height"] / 2 - $wInfo["height"] / 2;
				$posX = $sInfo["width"] / 2 - $wInfo["width"] / 2;
				break;
			case 6:
				$posY = $sInfo["height"] / 2 - $wInfo["height"] / 2;
				$posX = $sInfo["width"] - $wInfo["width"];
				break;
			case 7:
				$posY = 0;
				$posX = 0;
				break;
			case 8:
				$posY = 0;
				$posX = $sInfo["width"] / 2 - $wInfo["width"] / 2;
				break;
			case 9:
				$posY = 0;
				$posX = $sInfo["width"] - $wInfo["width"];
				break;
		}
//        $posY = $sInfo["height"] - $wInfo["height"];
//        $posX = $sInfo["width"] - $wInfo["width"];
		//生成混合图像
		imagecopy($sImage, $wImage, $posX, $posY, 0, 0, $wInfo['width'], $wInfo['height']);
//        imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo['width'], $wInfo['height'], $alpha);
		//输出图像
		$ImageFun = 'Image' . $sInfo['type'];
		//如果没有给出保存文件名，默认为原图像名
		if (!$savename) {
			$savename = $source;
			@unlink($source);
		}
		//保存图像
		$ImageFun($sImage, $savename);
		imagedestroy($sImage);
	}

	/**
	 * @param $r_img 原图像
	 * @param $d_img 目标图像
	 * @param $pos 水印所放的位置
	 * @param $str 水印的字符
	 * @param $color 水印的颜色
	 * @param $f_size 水印的字体大小
	 * @param $pct jpeg图片的压缩比 
	 * @return boolen 成功为真
	 */

	/**
	 * 1.是否支持GD库 文件是否存在 是否是一个图像 
	 * 2.得到水印的宽和高，如果水印大于图像的宽和高不加水印。
	 * 3.获得文字的颜色(定义文字的颜色)。
	 * 4.获得水印的x，y坐标位置。有9种情况。
	 * 5.写入文字。
	 * 6.存储图像。
	 * 7.消毁资源
	 */
	function water_text($r_img, $str = "u-bo.com", $color = "#276EB7", $f_size = 5, $pos = 5, $d_img = '', $pct = 80) {
		if (extension_loaded("gd") && file_exists($r_img) && getimagesize($r_img)) {
			$str_len = strlen($str);
//水印的宽度
			$w = imagefontwidth($f_size) * $str_len;
//水印的高度
			$h = imagefontheight($f_size);
//获得图像的信息
			$i_info = getimagesize($r_img);
			if ($i_info[0] < $w && $i_info[1] < $h) {
				return false;
			} else {
				switch ($i_info[2]) {
					case 1:
						$img = imagecreatefromgif($r_img);
						break;
					case 2:
						$img = imagecreatefromjpeg($r_img);
						break;
					case 3:
						$img = imagecreatefrompng($r_img);
						break;
					default:
						return false;
				}
//获得水印的颜色
//                if (strlen($color) != 7)
//                    return false;
//                $f_color = imagecolorallocate($img, hexdec(substr($color, 1, 2)), hexdec(substr($color, 3, 2)), hexdec(substr($color, 5, 2)));
//x,y坐标。
				switch ($pos) {
					case 7:
						$x = 8;
						$y = 8;
						break;
					case 8:
						$x = ($i_info[0] - $w) / 2;
						$y = 8;
						break;
					case 9:
						$x = $i_info[0] - $w;
						$y = 8;
						break;
					case 4:
						$x = 8;
						$y = $i_info[1] / 2;
						break;
					case 5:
						$x = ($i_info[0] - $w) / 2;
						$y = $i_info[1] / 2;
						break;
					case 6:
						$x = $i_info[0] - $w;
						$y = $i_info[1] / 2;
						break;
					case 1:
						$x = 8;
						$y = $i_info[1] - $h;
						break;
					case 2:
						$x = ($i_info[0] - $w) / 2;
						$y = $i_info[1] - $h;
						break;
					case 3:
						$x = $i_info[0] - $w;
						$y = $i_info[1] - $h;
						break;
				}

				imagestring($img, $f_size, $x, $y, $str, $f_color);
				$d_img = $d_img != '' ? $d_img : $r_img;
//存储图像
				switch ($i_info[2]) {
					case 1:
						imagegif($img, $d_img);
						break;
					case 2:
						imagejpeg($img, $d_img);
						break;
					case 3:
						imagepng($img, $d_img);
						break;
				}
				imagedestroy($img);
			}
		}
	}

	function showImg($imgFile, $text = '', $x = '10', $y = '10', $alpha = '50') {
		//获取图像文件信息
		//2007/6/26 增加图片水印输出，$text为图片的完整路径即可
		$info = self::getImageInfo($imgFile);
		if ($info !== false) {
			$createFun = str_replace('/', 'createfrom', $info['mime']);
			$im = $createFun($imgFile);
			if ($im) {
				$ImageFun = str_replace('/', '', $info['mime']);
				//水印开始
				if (!empty($text)) {
					$tc = imagecolorallocate($im, 0, 0, 0);
					if (is_file($text) && file_exists($text)) {//判断$text是否是图片路径
						// 取得水印信息
						$textInfo = self::getImageInfo($text);
						$createFun2 = str_replace('/', 'createfrom', $textInfo['mime']);
						$waterMark = $createFun2($text);
						//$waterMark=imagecolorallocatealpha($text,255,255,0,50);
						$imgW = $info["width"];
						$imgH = $info["width"] * $textInfo["height"] / $textInfo["width"];
						//$y	=	($info["height"]-$textInfo["height"])/2;
						//设置水印的显示位置和透明度支持各种图片格式
						imagecopymerge($im, $waterMark, $x, $y, 0, 0, $textInfo['width'], $textInfo['height'], $alpha);
					} else {
						imagestring($im, 80, $x, $y, $text, $tc);
					}
					//ImageDestroy($tc);
				}
				//水印结束
				if ($info['type'] == 'png' || $info['type'] == 'gif') {
					imagealphablending($im, FALSE); //取消默认的混色模式
					imagesavealpha($im, TRUE); //设定保存完整的 alpha 通道信息
				}
				Header("Content-type: " . $info['mime']);
				$ImageFun($im);
				@ImageDestroy($im);
				return;
			}

			//保存图像
			$ImageFun($sImage, $savename);
			imagedestroy($sImage);
			//获取或者创建图像文件失败则生成空白PNG图片
			$im = imagecreatetruecolor(80, 30);
			$bgc = imagecolorallocate($im, 255, 255, 255);
			$tc = imagecolorallocate($im, 0, 0, 0);
			imagefilledrectangle($im, 0, 0, 150, 30, $bgc);
			imagestring($im, 4, 5, 5, "no pic", $tc);
			self::output($im);
			return;
		}
	}

	/**
	 * 生成缩略图
	 * @static
	 * @access public
	 * @param string $image  原图
	 * @param string $type 图像格式
	 * @param string $thumbname 缩略图文件名
	 * @param string $maxWidth  宽度
	 * @param string $maxHeight  高度
	 * @param string $position 缩略图保存目录
	 * @param boolean $interlace 启用隔行扫描
	 * @return void
	 */
	static function thumb($image, $thumbname, $type = '', $maxWidth = 200, $maxHeight = 50, $interlace = true) {
		// 获取原图信息
		$info = self::getImageInfo($image);
		if ($info !== false) {
			$srcWidth = $info['width'];
			$srcHeight = $info['height'];
			$type = empty($type) ? $info['type'] : $type;
			$type = strtolower($type);
			$interlace = $interlace ? 1 : 0;
			unset($info);
			$scale = min($maxWidth / $srcWidth, $maxHeight / $srcHeight); // 计算缩放比例
			if ($scale >= 1) {
				// 超过原图大小不再缩略
				$width = $srcWidth;
				$height = $srcHeight;
			} else {
				// 缩略图尺寸
				$width = (int) ($srcWidth * $scale);
				$height = (int) ($srcHeight * $scale);
			}

			// 载入原图
			$createFun = 'ImageCreateFrom' . ($type == 'jpg' ? 'jpeg' : $type);
			if (!function_exists($createFun)) {
				return false;
			}
			$srcImg = $createFun($image);

			//创建缩略图
			if ($type != 'gif' && function_exists('imagecreatetruecolor'))
				$thumbImg = imagecreatetruecolor($width, $height);
			else
				$thumbImg = imagecreate($width, $height);
			//png和gif的透明处理 by luofei614
			if ('png' == $type) {
				imagealphablending($thumbImg, false); //取消默认的混色模式（为解决阴影为绿色的问题）
				imagesavealpha($thumbImg, true); //设定保存完整的 alpha 通道信息（为解决阴影为绿色的问题）    
			} elseif ('gif' == $type) {
				$trnprt_indx = imagecolortransparent($srcImg);
				if ($trnprt_indx >= 0) {
					//its transparent
					$trnprt_color = imagecolorsforindex($srcImg, $trnprt_indx);
					$trnprt_indx = imagecolorallocate($thumbImg, $trnprt_color['red'], $trnprt_color['green'], $trnprt_color['blue']);
					imagefill($thumbImg, 0, 0, $trnprt_indx);
					imagecolortransparent($thumbImg, $trnprt_indx);
				}
			}
			// 复制图片
			if (function_exists("ImageCopyResampled"))
				imagecopyresampled($thumbImg, $srcImg, 0, 0, 0, 0, $width, $height, $srcWidth, $srcHeight);
			else
				imagecopyresized($thumbImg, $srcImg, 0, 0, 0, 0, $width, $height, $srcWidth, $srcHeight);

			// 对jpeg图形设置隔行扫描
			if ('jpg' == $type || 'jpeg' == $type)
				imageinterlace($thumbImg, $interlace);

			// 生成图片
			$imageFun = 'image' . ($type == 'jpg' ? 'jpeg' : $type);
			$imageFun($thumbImg, $thumbname);
			imagedestroy($thumbImg);
			imagedestroy($srcImg);
			return $thumbname;
		}
		return false;
	}

	/**
	 * 生成特定尺寸缩略图 解决原版缩略图不能满足特定尺寸的问题 PS：会裁掉图片不符合缩略图比例的部分
	 * @static
	 * @access public
	 * @param string $image  原图
	 * @param string $type 图像格式
	 * @param string $thumbname 缩略图文件名
	 * @param string $maxWidth  宽度
	 * @param string $maxHeight  高度
	 * @param boolean $interlace 启用隔行扫描
	 * @return void
	 */
	static function thumb2($image, $thumbname, $type = '', $maxWidth = 200, $maxHeight = 50, $interlace = true) {
		// 获取原图信息
		$info = self::getImageInfo($image);
		if ($info !== false) {
			$srcWidth = $info['width'];
			$srcHeight = $info['height'];
			$type = empty($type) ? $info['type'] : $type;
			$type = strtolower($type);
			$interlace = $interlace ? 1 : 0;
			unset($info);
			$scale = max($maxWidth / $srcWidth, $maxHeight / $srcHeight); // 计算缩放比例
			//判断原图和缩略图比例 如原图宽于缩略图则裁掉两边 反之..
			if ($maxWidth / $srcWidth > $maxHeight / $srcHeight) {
				//高于
				$srcX = 0;
				$srcY = ($srcHeight - $maxHeight / $scale) / 2;
				$cutWidth = $srcWidth;
				$cutHeight = $maxHeight / $scale;
			} else {
				//宽于
				$srcX = ($srcWidth - $maxWidth / $scale) / 2;
				$srcY = 0;
				$cutWidth = $maxWidth / $scale;
				$cutHeight = $srcHeight;
			}

			// 载入原图
			$createFun = 'ImageCreateFrom' . ($type == 'jpg' ? 'jpeg' : $type);
			$srcImg = $createFun($image);

			//创建缩略图
			if ($type != 'gif' && function_exists('imagecreatetruecolor'))
				$thumbImg = imagecreatetruecolor($maxWidth, $maxHeight);
			else
				$thumbImg = imagecreate($maxWidth, $maxHeight);

			// 复制图片
			if (function_exists("ImageCopyResampled"))
				imagecopyresampled($thumbImg, $srcImg, 0, 0, $srcX, $srcY, $maxWidth, $maxHeight, $cutWidth, $cutHeight);
			else
				imagecopyresized($thumbImg, $srcImg, 0, 0, $srcX, $srcY, $maxWidth, $maxHeight, $cutWidth, $cutHeight);
			if ('gif' == $type || 'png' == $type) {
				//imagealphablending($thumbImg, false);//取消默认的混色模式
				//imagesavealpha($thumbImg,true);//设定保存完整的 alpha 通道信息
				$background_color = imagecolorallocate($thumbImg, 0, 255, 0);  //  指派一个绿色
				imagecolortransparent($thumbImg, $background_color);  //  设置为透明色，若注释掉该行则输出绿色的图
			}

			// 对jpeg图形设置隔行扫描
			if ('jpg' == $type || 'jpeg' == $type)
				imageinterlace($thumbImg, $interlace);

			// 生成图片
			$imageFun = 'image' . ($type == 'jpg' ? 'jpeg' : $type);
			$imageFun($thumbImg, $thumbname);
			imagedestroy($thumbImg);
			imagedestroy($srcImg);
			return $thumbname;
		}
		return false;
	}

    /**
     * 裁剪图片
     *
     * @param string $f 图片路径
     * @param int $tw 图片宽度
     * @param int $th 图片高度
     * @param int $autocat 是否自动裁剪
     */
    static function thumb3($f, $tw = 300, $th = 300, $autocat = 0, $nopic = 'nopic.jpg', $t = '') {    
        $root = Yii::getAlias('@web');
        if (strstr($f, '://'))
            return $f; //网络地址不进行裁剪
        if (empty($f))
            return $root . '/static/images/' . $nopic;
        $f = '.' . str_replace($root, '', $f);
        if (!is_file($f)) {
            return '';
        }

        $temp = array(1 => 'gif', 2 => 'jpeg', 3 => 'png');
        list($fw, $fh, $tmp) = getimagesize($f);
        if (empty($t)) {
            if ($fw > $tw && $fh > $th) {
                $pathinfo = pathinfo($f);
                $extinfo = $pathinfo['extension'];
                $pathinfo['basename'] = basename($pathinfo['basename'], '.' . $extinfo);
                $t = $pathinfo['dirname'] . '/thumb_' . $pathinfo['basename'] . '_' . $tw . '_' . $th . '.' . $extinfo;
                if (is_file($t)) {
                    return $root . substr($t, 1);
                }
            } else {
                return $root . substr($f, 1);
            }
        }

        if (!$temp[$tmp]) {
            return false;
        }

        if ($autocat) {
            if ($fw / $tw > $fh / $th) {
                $fw = $tw * ($fh / $th);
            } else {
                $fh = $th * ($fw / $tw);
            }
        } else {

            $scale = min($tw / $fw, $th / $fh); // 计算缩放比例
            if ($scale >= 1) {
                // 超过原图大小不再缩略
                $tw = $fw;
                $th = $fh;
            } else {
                // 缩略图尺寸
                $tw = (int) ($fw * $scale);
                $th = (int) ($fh * $scale);
            }
        }

        $tmp = $temp[$tmp];
        $infunc = "imagecreatefrom$tmp";
        $outfunc = "image$tmp";
        $fimg = $infunc($f);

        if ($tmp != 'gif' && function_exists('imagecreatetruecolor')) {
            $timg = imagecreatetruecolor($tw, $th);
        } else {
            $timg = imagecreate($tw, $th);
        }


        if (function_exists('imagecopyresampled'))
            imagecopyresampled($timg, $fimg, 0, 0, 0, 0, $tw, $th, $fw, $fh);
        else
            imagecopyresized($timg, $fimg, 0, 0, 0, 0, $tw, $th, $fw, $fh);
        if ($tmp == 'gif' || $tmp == 'png') {
            $background_color = imagecolorallocate($timg, 0, 255, 0);  //  指派一个绿色
            imagecolortransparent($timg, $background_color);  //  设置为透明色，若注释掉该行则输出绿色的图
        }
        $outfunc($timg, $t);
        imagedestroy($timg);
        imagedestroy($fimg);
        return $root . substr($t, 1);
    }


	/**
	 * 根据给定的字符串生成图像
	 * @static
	 * @access public
	 * @param string $string  字符串
	 * @param string $size  图像大小 width,height 或者 array(width,height)
	 * @param string $font  字体信息 fontface,fontsize 或者 array(fontface,fontsize)
	 * @param string $type 图像格式 默认PNG
	 * @param integer $disturb 是否干扰 1 点干扰 2 线干扰 3 复合干扰 0 无干扰
	 * @param bool $border  是否加边框 array(color)
	 * @return string
	 */
	static function buildString($string, $rgb = array(), $filename = '', $type = 'png', $disturb = 1, $border = true) {
		if (is_string($size))
			$size = explode(',', $size);
		$width = $size[0];
		$height = $size[1];
		if (is_string($font))
			$font = explode(',', $font);
		$fontface = $font[0];
		$fontsize = $font[1];
		$length = strlen($string);
		$width = ($length * 9 + 10) > $width ? $length * 9 + 10 : $width;
		$height = 22;
		if ($type != 'gif' && function_exists('imagecreatetruecolor')) {
			$im = @imagecreatetruecolor($width, $height);
		} else {
			$im = @imagecreate($width, $height);
		}
		if (empty($rgb)) {
			$color = imagecolorallocate($im, 102, 104, 104);
		} else {
			$color = imagecolorallocate($im, $rgb[0], $rgb[1], $rgb[2]);
		}
		$backColor = imagecolorallocate($im, 255, 255, 255); //背景色（随机）
		$borderColor = imagecolorallocate($im, 100, 100, 100);  //边框色
		$pointColor = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));  //点颜色

		@imagefilledrectangle($im, 0, 0, $width - 1, $height - 1, $backColor);
		@imagerectangle($im, 0, 0, $width - 1, $height - 1, $borderColor);
		@imagestring($im, 5, 5, 3, $string, $color);
		if (!empty($disturb)) {
			// 添加干扰
			if ($disturb = 1 || $disturb = 3) {
				for ($i = 0; $i < 25; $i++) {
					imagesetpixel($im, mt_rand(0, $width), mt_rand(0, $height), $pointColor);
				}
			} elseif ($disturb = 2 || $disturb = 3) {
				for ($i = 0; $i < 10; $i++) {
					imagearc($im, mt_rand(-10, $width), mt_rand(-10, $height), mt_rand(30, 300), mt_rand(20, 200), 55, 44, $pointColor);
				}
			}
		}
		self::output($im, $type, $filename);
	}

	/**
	 * 生成图像验证码
	 * @static
	 * @access public
	 * @param string $length  位数
	 * @param string $mode  类型
	 * @param string $type 图像格式
	 * @param string $width  宽度
	 * @param string $height  高度
	 * @return string
	 */
	static function buildImageVerify($length = 4, $mode = 1, $type = 'png', $width = 48, $height = 22, $verifyName = 'verify') {
		import('ORG.Util.String');
		$randval = String::randString($length, $mode);
		session($verifyName, md5($randval));
		$width = ($length * 10 + 10) > $width ? $length * 10 + 10 : $width;
		if ($type != 'gif' && function_exists('imagecreatetruecolor')) {
			$im = imagecreatetruecolor($width, $height);
		} else {
			$im = imagecreate($width, $height);
		}
		$r = Array(225, 255, 255, 223);
		$g = Array(225, 236, 237, 255);
		$b = Array(225, 236, 166, 125);
		$key = mt_rand(0, 3);

		$backColor = imagecolorallocate($im, $r[$key], $g[$key], $b[$key]); //背景色（随机）
		$borderColor = imagecolorallocate($im, 100, 100, 100);  //边框色
		imagefilledrectangle($im, 0, 0, $width - 1, $height - 1, $backColor);
		imagerectangle($im, 0, 0, $width - 1, $height - 1, $borderColor);
		$stringColor = imagecolorallocate($im, mt_rand(0, 200), mt_rand(0, 120), mt_rand(0, 120));
		// 干扰
		for ($i = 0; $i < 10; $i++) {
			imagearc($im, mt_rand(-10, $width), mt_rand(-10, $height), mt_rand(30, 300), mt_rand(20, 200), 55, 44, $stringColor);
		}
		for ($i = 0; $i < 25; $i++) {
			imagesetpixel($im, mt_rand(0, $width), mt_rand(0, $height), $stringColor);
		}
		for ($i = 0; $i < $length; $i++) {
			imagestring($im, 5, $i * 10 + 5, mt_rand(1, 8), $randval{$i}, $stringColor);
		}
		self::output($im, $type);
	}

	// 中文验证码
	static function GBVerify($length = 4, $type = 'png', $width = 180, $height = 50, $fontface = 'simhei.ttf', $verifyName = 'verify') {
		import('ORG.Util.String');
		$code = String::randString($length, 4);
		$width = ($length * 45) > $width ? $length * 45 : $width;
		session($verifyName, md5($code));
		$im = imagecreatetruecolor($width, $height);
		$borderColor = imagecolorallocate($im, 100, 100, 100);  //边框色
		$bkcolor = imagecolorallocate($im, 250, 250, 250);
		imagefill($im, 0, 0, $bkcolor);
		@imagerectangle($im, 0, 0, $width - 1, $height - 1, $borderColor);
		// 干扰
		for ($i = 0; $i < 15; $i++) {
			$fontcolor = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
			imagearc($im, mt_rand(-10, $width), mt_rand(-10, $height), mt_rand(30, 300), mt_rand(20, 200), 55, 44, $fontcolor);
		}
		for ($i = 0; $i < 255; $i++) {
			$fontcolor = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
			imagesetpixel($im, mt_rand(0, $width), mt_rand(0, $height), $fontcolor);
		}
		if (!is_file($fontface)) {
			$fontface = dirname(__FILE__) . "/" . $fontface;
		}
		for ($i = 0; $i < $length; $i++) {
			$fontcolor = imagecolorallocate($im, mt_rand(0, 120), mt_rand(0, 120), mt_rand(0, 120)); //这样保证随机出来的颜色较深。
			$codex = String::msubstr($code, $i, 1);
			imagettftext($im, mt_rand(16, 20), mt_rand(-60, 60), 40 * $i + 20, mt_rand(30, 35), $fontcolor, $fontface, $codex);
		}
		self::output($im, $type);
	}

	/**
	 * 把图像转换成字符显示
	 * @static
	 * @access public
	 * @param string $image  要显示的图像
	 * @param string $type  图像类型，默认自动获取
	 * @return string
	 */
	static function showASCIIImg($image, $string = '', $type = '') {
		$info = self::getImageInfo($image);
		if ($info !== false) {
			$type = empty($type) ? $info['type'] : $type;
			unset($info);
			// 载入原图
			$createFun = 'ImageCreateFrom' . ($type == 'jpg' ? 'jpeg' : $type);
			$im = $createFun($image);
			$dx = imagesx($im);
			$dy = imagesy($im);
			$i = 0;
			$out = '<span style="padding:0px;margin:0;line-height:100%;font-size:1px;">';
			set_time_limit(0);
			for ($y = 0; $y < $dy; $y++) {
				for ($x = 0; $x < $dx; $x++) {
					$col = imagecolorat($im, $x, $y);
					$rgb = imagecolorsforindex($im, $col);
					$str = empty($string) ? '*' : $string[$i++];
					$out .= sprintf('<span style="margin:0px;color:#%02x%02x%02x">' . $str . '</span>', $rgb['red'], $rgb['green'], $rgb['blue']);
				}
				$out .= "<br>\n";
			}
			$out .= '</span>';
			imagedestroy($im);
			return $out;
		}
		return false;
	}

	/**
	 * 生成UPC-A条形码
	 * @static
	 * @param string $type 图像格式
	 * @param string $type 图像格式
	 * @param string $lw  单元宽度
	 * @param string $hi   条码高度
	 * @return string
	 */
	static function UPCA($code, $type = 'png', $lw = 2, $hi = 100) {
		static $Lencode = array('0001101', '0011001', '0010011', '0111101', '0100011',
			'0110001', '0101111', '0111011', '0110111', '0001011');
		static $Rencode = array('1110010', '1100110', '1101100', '1000010', '1011100',
			'1001110', '1010000', '1000100', '1001000', '1110100');
		$ends = '101';
		$center = '01010';
		/* UPC-A Must be 11 digits, we compute the checksum. */
		if (strlen($code) != 11) {
			die("UPC-A Must be 11 digits.");
		}
		/* Compute the EAN-13 Checksum digit */
		$ncode = '0' . $code;
		$even = 0;
		$odd = 0;
		for ($x = 0; $x < 12; $x++) {
			if ($x % 2) {
				$odd += $ncode[$x];
			} else {
				$even += $ncode[$x];
			}
		}
		$code.= ( 10 - (($odd * 3 + $even) % 10)) % 10;
		/* Create the bar encoding using a binary string */
		$bars = $ends;
		$bars.=$Lencode[$code[0]];
		for ($x = 1; $x < 6; $x++) {
			$bars.=$Lencode[$code[$x]];
		}
		$bars.=$center;
		for ($x = 6; $x < 12; $x++) {
			$bars.=$Rencode[$code[$x]];
		}
		$bars.=$ends;
		/* Generate the Barcode Image */
		if ($type != 'gif' && function_exists('imagecreatetruecolor')) {
			$im = imagecreatetruecolor($lw * 95 + 30, $hi + 30);
		} else {
			$im = imagecreate($lw * 95 + 30, $hi + 30);
		}
		$fg = ImageColorAllocate($im, 0, 0, 0);
		$bg = ImageColorAllocate($im, 255, 255, 255);
		ImageFilledRectangle($im, 0, 0, $lw * 95 + 30, $hi + 30, $bg);
		$shift = 10;
		for ($x = 0; $x < strlen($bars); $x++) {
			if (($x < 10) || ($x >= 45 && $x < 50) || ($x >= 85)) {
				$sh = 10;
			} else {
				$sh = 0;
			}
			if ($bars[$x] == '1') {
				$color = $fg;
			} else {
				$color = $bg;
			}
			ImageFilledRectangle($im, ($x * $lw) + 15, 5, ($x + 1) * $lw + 14, $hi + 5 + $sh, $color);
		}
		/* Add the Human Readable Label */
		ImageString($im, 4, 5, $hi - 5, $code[0], $fg);
		for ($x = 0; $x < 5; $x++) {
			ImageString($im, 5, $lw * (13 + $x * 6) + 15, $hi + 5, $code[$x + 1], $fg);
			ImageString($im, 5, $lw * (53 + $x * 6) + 15, $hi + 5, $code[$x + 6], $fg);
		}
		ImageString($im, 4, $lw * 95 + 17, $hi - 5, $code[11], $fg);
		/* Output the Header and Content. */
		self::output($im, $type);
	}

	static function output($im, $type = 'png', $filename = '') {
		header("Content-type: image/" . $type);
		$ImageFun = 'image' . $type;
		if (empty($filename)) {
			$ImageFun($im);
		} else {
			$ImageFun($im, $filename);
		}
		imagedestroy($im);
	}

}
