/** * 图片缩放水印类 * */ class cls_photo { protected $waterrate = 0.2; //水印图标在图片上的比例 protected $width = 300; //缩略图默认宽度 protected $height = 200; //缩略图默认高度 protected $padding = 5; //水印图到边的距离 protected $water_mark = "./water.png"; protected $water_mark_pos = 5;//水印图片位置（1=左上角，2=右上角，3=左下角,4=右下角,5中央） protected $watermode = 0;// 0缩略图时不打水印 1缩略图时打水印 protected $magick_handle;//图片操作句柄 protected $format = array ( 'jpg','gif','png','jpeg' ); // 图片文件格式限定 protected $smallpic_mode = 2;//默认模式 0为不生成缩略图， 1为裁切缩放 ，2为比例缩放 3为缩放填充模式 /** * 设置图片类参数 * * @param $arg 图片参数 多次可放入数组里 如下 * @param $protected 参数值 * array( * 'waterrate'=>0.2, * 'water_mark'=>'./water.png', * 'water_mark_pos'=>4, * 'smallpic_mode'=>1 * ); * @return ture/false */ public function set_args ( $arg,$val="" ) { $params = array ( 'waterrate','water_mark','water_mark_pos','smallpic_mode','watermode','width','height' ); if ( is_array ( $arg ) ) { foreach ( $arg as $k =>$v ) { if ( in_array ( $k,$params ) ) { $this->$k = $v; } } } else { if ( empty ( $val ) ) { return false; } else { if ( in_array ( $arg,$params ) ) { $this->$arg = $val; } } } return true; } /** * 图片缩放 * * @param $src_file 源文件路径 * @param $dst_file 目标文件路径 * @return 缩略图片路径/false */ public function scale ( $src_file,$dst_file="" ) { $dst_width = $this->width; $dst_height = $this->height; $mode = $this->smallpic_mode; $magic_water_handle = NewMagickWand(); if ( !MagickReadImage ( $magic_water_handle, $src_file ) ) return false; //类型 $srcext = strtolower ( MagickGetImageFormat ( $magic_water_handle ) ); if ( $srcext=='bmp' ) { $srcext = 'jpeg'; } if ( !in_array ( $srcext,$this->format ) ) return false; //尺寸 $src_width = MagickGetImageWidth ( $magic_water_handle ); $src_height = MagickGetImageHeight ( $magic_water_handle ); //裁切缩放模式 if ( $mode == 1 ) { $pos_x=$pos_y = 0;//裁切临时位置 $src_widthc = $src_width;//裁切临时宽度 $src_heightc = $src_height;//裁切临时高度 if ( $src_width/$src_height>$dst_width/$dst_height ) { $src_widthc = $src_height*$dst_width/$dst_height; $pos_x = ( $src_width-$src_widthc ) /2; } else { $src_heightc = $src_width*$dst_height/$dst_width; $pos_y = ( $src_height-$src_heightc ) /2; } MagickCropImage ( $magic_water_handle,$src_widthc,$src_heightc,$pos_x,$pos_y );//裁切 //因为MagickCropImage函数后，Gif 图像改，但画布不变 $this->magick_handle = NewMagickWand(); MagickNewImage ( $this->magick_handle,$src_widthc,$src_heightc,'#ffffff' ); MagickSetFormat ( $this->magick_handle,$srcext ); MagickCompositeImage ( $this->magick_handle,$magic_water_handle,MW_OverCompositeOp,0,0 ); //缩放 MagickScaleImage ( $this->magick_handle, $dst_width, $dst_height ); } //比例缩放模式 if ( $mode == 2 ) { if ( $src_width/$src_height>$dst_width/$dst_height ) { $dst_height=$dst_width*$src_height/$src_width; } else { $dst_width=$dst_height*$src_width/$src_height; } $this->magick_handle=$magic_water_handle;//替换 MagickScaleImage ( $this->magick_handle, $dst_width, $dst_height );//缩放 } //缩放填充模式 if ( $mode == 3 ) { if ( $src_width/$src_height>$dst_width/$dst_height ) { $dst_heightc=$dst_width*$src_height/$src_width; $dst_widthc=$dst_width; } else { $dst_widthc=$dst_height*$src_width/$src_height; $dst_heightc=$dst_height; } MagickScaleImage ( $magic_water_handle, $dst_widthc, $dst_heightc );//缩放 $this->magick_handle = NewMagickWand(); MagickNewImage ( $this->magick_handle,$dst_width,$dst_height,$this->smallpic_bgcolor ); MagickSetFormat ( $this->magick_handle,$srcext ); MagickCompositeImage ( $this->magick_handle,$magic_water_handle,MW_OverCompositeOp, ( $dst_width-$dst_widthc ) /2, ( $dst_height-$dst_heightc ) /2 ); } //打水印 if ( $this->watermode == 1 ) { $this->set_mark(); } if ( empty ( $dst_file ) ) { //建立临时文件 $dst_file = tempnam ( $_SERVER["SINASRV_CACHE_DIR"],"TMP_IMG" ); } MagickWriteImage ( $this->magick_handle, $dst_file ); return $dst_file; } /** * 打水印 * * @param $src_file 要打水印的图片路径 * @param $dst_file 生产水印的文件保存路径，为空则生产随机临时文件 * @return 水印文件路径/false */ public function water_mark ( $src_file,$dst_file="" ) { $this->magick_handle = NewMagickWand(); if ( !MagickReadImage ( $this->magick_handle, $src_file ) ) return false; $this->set_mark(); if ( empty ( $dst_file ) ) { //建立临时文件 $dst_file = tempnam ( $_SERVER["SINASRV_CACHE_DIR"],"TMP_IMG" ); } MagickWriteImage ( $this->magick_handle, $dst_file ); return $dst_file; } /** * 对内接口 * 给图片打水印 * */ protected function set_mark() { //尺寸 $dst_width = MagickGetImageWidth ( $this->magick_handle ); $dst_height = MagickGetImageHeight ( $this->magick_handle ); //处理水印图 if ( $this->water_mark && is_file ( $this->water_mark ) ) { $magic_water_handle = NewMagickWand(); MagickRemoveImage ( $magic_water_handle ); if ( MagickReadImage ( $magic_water_handle, $this->water_mark ) ) { MagickScaleImage ( $magic_water_handle, $dst_width*$this->waterrate, $dst_width*$this->waterrate*MagickGetImageHeight ( $magic_water_handle ) /MagickGetImageWidth ( $magic_water_handle ) );//缩放水印到图片的1/5 if ( $this->water_mark_pos == 1 ) { $left = $this->padding; $top = $this->padding; } elseif ( $this->water_mark_pos == 2 ) { $left = $dst_width-$this->padding-MagickGetImageWidth ( $magic_water_handle ); $top = $this->padding; } elseif ( $this->water_mark_pos == 3 ) { $left = $this->padding; $top = $dst_height -$this->padding-MagickGetImageHeight ( $magic_water_handle ); } elseif ( $this->water_mark_pos == 4 ) { $left = $dst_width-$this->padding-MagickGetImageWidth ( $magic_water_handle ); $top =$dst_height -$this->padding-MagickGetImageHeight ( $magic_water_handle ); } elseif ( $this->water_mark_pos == 5 ) { $left = ( $dst_width-MagickGetImageWidth ( $magic_water_handle ) ) /2; $top = ( $dst_height -MagickGetImageHeight ( $magic_water_handle ) ) /2; } MagickCompositeImage ( $this->magick_handle,$magic_water_handle,MW_OverCompositeOp,$left,$top ); } } } }
