PHP class that implements thumbnails and watermarks-PHP Tutorial-php.cn

PHP class that implements thumbnails and watermarks

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Release： 2016-07-25 08:45:09

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/**
* Image scaling watermark class
*
* @version 1.0;
*
*/
class cls_photo
{
protected $waterrate = 0.2; //The ratio of the watermark icon on the image
protected $width = 300; //The default width of the thumbnail
protected $height = 200; //Default height of thumbnail
protected $padding = 5; //Distance from watermark image to edge
protected $water_mark = "./water.png";
protected $water_mark_pos = 5; //Watermark image position ( 1=upper left corner, 2=upper right corner, 3=lower left corner, 4=lower right corner, 5 center)
protected $watermode = 0; // 0 does not print watermark when thumbnail 1 prints watermark when thumbnail
protected $magick_handle; //Picture operation handle
protected $format = array('jpg','gif','png','jpeg'); // Picture file format limitation
protected $smallpic_mode = 2; //Default mode 0 is not generated Thumbnail, 1 is crop scaling, 2 is proportional scaling, 3 is scaling fill mode
/**
* Set image parameters
*
* @param $arg Image parameters can be put into the array multiple times as follows
* @param $protected parameter value
* array(
* 'waterrate'=>0.2,
* 'water_mark '=>'./water.png',
* 'water_mark_pos'=>4,
* 'smallpic_mode'=>1
* );
* @return ture/false
*/
public function set_args($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;
}
/**
* Image scaling
*
* @param $src_file source file path
* @param $dst_file destination file path
* @return thumbnail image path/false
*/
public function scale($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;
//Type
$srcext = strtolower(MagicGetImageFormat($magic_water_handle) );
if($srcext=='bmp')
{
$srcext = 'jpeg';
}
if(!in_array($srcext,$this->format))return false;
//size
$src_width = MagickGetImageWidth($magic_water_handle);
$src_height = MagickGetImageHeight($magic_water_handle);
//Crop scaling mode
if($mode == 1)
{
$pos_x=$pos_y = 0;//Crop Cut temporary position
$src_widthc = $src_width;//Cut temporary width
$src_heightc = $src_height;//Cut temporary height
if($src_width/$src_height>$dst_width/$dst_height)
{
$src_widthc = $ SRC_HEIGHT*$ dst_width/$ dst_height;
$ POS_X = ($ src_width-$ src_widthc)/2; dst_height/$ dst_width;
$ POS_Y = ($ SRC_HEIGHT -$src_heightc)/2;
}
MagickCropImage($magic_water_handle,$src_widthc,$src_heightc,$pos_x,$pos_y);//Crop
//Because after the MagickCropImage function, the Gif image changes, but the canvas remains unchanged
$ this->magick_handle = NewMagickWand();
MagickNewImage($this->magick_handle,$src_widthc,$src_heightc,'#ffffff');
MagickSetFormat($this->magick_handle,$srcext);
MagickCompositeImage($ this->magick_handle,$magic_water_handle,MW_OverCompositeOp,0,0);
//Scale
MagickScaleImage($this->magick_handle, $dst_width, $dst_height);
}
//Proportional scaling mode
if($ 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;
}
/**
* Watermarking
*
* @param $src_file The path of the image to be watermarked
* @param $dst_file The file saving path for producing watermarks. If it is empty, a random temporary file will be produced
* @return The path of the watermark file/false
*/
public function water_mark($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;
}
/**
* Internal interface
* Watermark pictures
*
*/
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);
}
}
}
}

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