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845天前/** |
* 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 ); |
} |
} |
} |
} |
