Copy CodeThe code is as follows:
/**
* Author:yagas
* email:yagas60@21cn.com
*/
Class Image
{
/** class Protection Variable */
protected $th _width = 100;
protected $th _height = 50;
protected $quality = 85; Picture quality
protected $transparent = 50; Watermark Transparency
protected $background = "255,255,255"; Background color
/**
* Generate thumbnail files
* @param $src Original document
* @param $dst target file
*/
Public function thumb ($src, $dst =null, $output =true)
{
$thumb = Array ($this->th_width, $this->th_height);
$this->scale ($SRC, $thumb, $DST, $output);
}
/**
* Zoom to Picture by percentage
* @param string $src original file
* @param string $DST the target file entered
* @param float/array $zoom scaling, floating-point type when a percentage bloom, array type when scaled by a specified size
* @param boolean $output whether to generate file output
*/
Public Function Scale ($SRC, $dst =null, $zoom =1, $output =true)
{
if (!file_exists ($SRC)) Die (' File not exists. ');
if (! $zoom) Die (' The Zoom undefine. ');
$src _im = $this->im ($SRC);
$old _width = imagesx ($src _im);
if (Is_float ($zoom)) {
Scale by percentage
$new _width = $old _width * $zoom;
}
ElseIf (Is_array ($zoom)) {
Clear Scaling Dimensions
$new _width = $zoom [0];
}
Whether to define the height of the zoom
if (!isset ($zoom [1])) {
Equal scale Scaling
$resize _im = $this->imageresize ($src _im, $new _width);
}
else {
Non-proportional scaling
$resize _im = $this->imageresize ($src _im, $new _width, $zoom [1]);
}
if (! $output) {
Header ("Content-type:image/jpeg");
Imagejpeg ($resize _im, NULL, $this->quality);
}
else {
$new _file = Empty ($DST)? $SRC: $DST;
Imagejpeg ($resize _im, $new _file, $this->quality);
}
Imagedestroy ($im);
Imagedestroy ($NIM);
}
/**
* Cut the picture
* @param $src Original file
* @param $dst target file
* @param $output whether to generate the target file
*/
Public function Capture ($SRC, $dst =null, $output =true) {
if (!file_exists ($SRC)) Die (' File not exists. ');
$width = $this->th_width;
$height = $this->th_height;
$src _im = $this->im ($SRC);
$old _width = imagesx ($src _im);
$old _height = Imagesy ($src _im);
$capture = Imagecreatetruecolor ($width, $height);
$rgb = Explode (",", $this->background);
$white = Imagecolorallocate ($capture, $rgb [0], $rgb [1], $rgb [2]);
Imagefill ($capture, 0, 0, $white);
Zoom when the picture is larger than the thumbnail
if ($old _width > $width && $old _height> $height) {
$resize _im = $this->imageresize ($src _im, $width);
When the picture scale is not normalized, the scale is recalculated for cropping
if (Imagesy ($resize _im) < $height) {
$proportion = $old _height/$this->th_height;
$resize _im = $this->imageresize ($src _im, $old _width/$proportion);
}
$POSX = 0;
$posy = 0;
}
else {
Center the picture when the picture is smaller than the thumbnail image
$POSX = ($width-$old _width)/2;
$posy = ($height-$old _height)/2;
$resize _im = $src _im;
}
Imagecopy ($capture, $resize _im, $posx, $posy, 0, 0, imagesx ($resize _im), Imagesy ($resize _im));
if (! $output) {
Header ("Content-type:image/jpeg");
imagejpeg ($capture, NULL, $this->quality);
}
else {
$new _file = Empty ($DST)? $SRC: $DST;
Imagejpeg ($capture, $new _file, $this->quality);
}
Imagedestroy ($src _im);
@imagedestroy ($resize _im);
Imagedestroy ($capture);
}
/**
* Write watermark Image
* @param $src need to write a picture of the watermark
* @param $mark watermark Picture
* @param $transparent Watermark Transparency
*/
Public function mark ($SRC, $mark, $dst = ", $output =true)
{
$mark _info = getimagesize ($mark);
$src _info = getimagesize ($SRC);
List ($MW, $mh) = $mark _info;
List ($SW, $sh) = $src _info;
$px = $SW-$MW;
$py = $sh-$mh;
$im = $this->im ($SRC);
$mim = $this->im ($mark);
Imagecopymerge ($im, $mim, $px, $py, 0, 0, $MW, $MH, $this->transparent);
if ($output) {
$new _file = Empty ($DST)? $SRC: $DST;
Imagejpeg ($im, $new _file, $this->quality);
}
Else
{
Header (' Content-type:image/jpeg ');
Imagejpeg ($im);
}
Imagedestroy ($im);
Imagedestroy ($mim);
}
/**
* Get different GD objects through the file
*/
protected function IM ($file)
{
if (!file_exists ($file)) Die (' File not exists. ');
$info = getimagesize ($file);
Switch ($info [' MIME '])
{
Case ' image/gif ':
$mim = Imagecreatefromgif ($file);
Break
Case ' image/png ':
$mim = Imagecreatefrompng ($file);
Imagealphablending ($mim, false);
Imagesavealpha ($mim, true);
Break
Case ' Image/jpeg ':
$mim = Imagecreatefromjpeg ($file);
Break
Default
Die (' File format errors. ');
}
return $mim;
}
/**
* Processing of images for zooming
* @param resource $SRC _im image GD Object
* @param the width of an integer $width picture
* @param the height of an integer $height picture, and if you do not set the height, scale the picture proportionally
* @return Resuorce $im return a GD object
*/
protected function Imageresize ($src _im, $width, $height =null) {
$old _width = imagesx ($src _im);
$old _height = Imagesy ($src _im);
$proportion = $old _width/$old _height;
$new _width = $width;
$new _height = Is_null ($height)? Round ($new _width/$proportion): $height;
Create a new image and fill in the default background color
$im = Imagecreatetruecolor ($new _width, $new _height);
$rgb = Explode (",", $this->background);
$white = Imagecolorallocate ($im, $rgb [0], $rgb [1], $rgb [2]);
Imagefill ($im, 0, 0, $white);
Zoom to a picture
Imagecopyresized ($im, $src _im, 0, 0, 0, 0, $new _width, $new _height, $old _width, $old _height);
return $im;
}
/**
* Class variable Assignment
*/
Public Function __set ($key, $value)
{
$this $key = $value;
}
/**
* Get class variable values
*/
Public Function __get ($key)
{
return $this $key;
}
}
?>
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