PHP cropping pictures

GD Library to open

<?php


/**
* Author:smallchicken
* time:2009 June 8 16:46:05
* Mode 1: Forced cropping, generate images in strict accordance with the need, not enlarge, over cropping, the picture is always covered
* Mode 2: and 1 similar, but not when the General Assembly produces filler, can be removed with PNG.
* Mode 3: Only zoom, not crop, retain all picture information, will produce filler,
* Mode 4: Only zoom, not crop, keep all picture information, generate picture size for final scaled picture effective information of actual size, do not produce filler
* The default filler is white, if you want to make the filler into transparent pixels, use the Savealpha () method instead of the SaveImage () method
*
* Call Method:
*/
$ic =new imagecrop (' a.jpg ', ' aftercrop.jpg ');
$ic->crop (480,600,1);
$ic->saveimage ();
$ic->savealpha (); Turn filler into transparent pixel save
$ic->destory ();

Class imagecrop{

var $sImage;
var $dImage;
var $src _file;
var $dst _file;
var $src _width;
var $src _height;
var $src _ext;
var $src _type;

function Imagecrop ($src _file, $dst _file= ") {
$this->src_file= $src _file;
$this->dst_file= $DST _file;
$this->loadimage ();
}

function Setsrcfile ($src _file) {
$this->src_file= $src _file;
}

function Setdstfile ($dst _file) {
$this->dst_file= $DST _file;
}

function LoadImage () {
List ($this->src_width, $this->src_height, $this->src_type) = getimagesize ($this->src_file);
Switch ($this->src_type) {
Case IMAGETYPE_JPEG:
$this->simage=imagecreatefromjpeg ($this->src_file);
$this->ext= ' jpg ';
Break
Case Imagetype_png:
$this->simage=imagecreatefrompng ($this->src_file);
$this->ext= ' png ';
Break
Case Imagetype_gif:
$this->simage=imagecreatefromgif ($this->src_file);
$this->ext= ' gif ';
Break
Default
Exit ();
}
}

function SaveImage ($fileName = ") {
$this->dst_file= $fileName? $fileName: $this->dst_file;
Switch ($this->src_type) {
Case IMAGETYPE_JPEG:
Imagejpeg ($this->dimage, $this->dst_file,100);
Break
Case Imagetype_png:
Imagepng ($this->dimage, $this->dst_file);
Break
Case Imagetype_gif:
Imagegif ($this->dimage, $this->dst_file);
Break
Default
Break
}
}

function Outimage () {
Switch ($this->src_type) {
Case IMAGETYPE_JPEG:
Header (' Content-type:image/jpeg ');
Imagejpeg ($this->dimage);
Break
Case Imagetype_png:
Header (' content-type:image/png ');
Imagepng ($this->dimage);
Break
Case Imagetype_gif:
Header (' content-type:image/gif ');
Imagegif ($this->dimage);
Break
Default
Break
}
}

function Savealpha ($fileName = ") {
$this->dst_file= $fileName? $fileName. '. png ': $this->dst_file '. PNG ';
Imagesavealpha ($this->dimage, true);
Imagepng ($this->dimage, $this->dst_file);
}

function Outalpha () {
Imagesavealpha ($this->dimage, true);
Header (' content-type:image/png ');
Imagepng ($this->dimage);
}

function Destory () {
Imagedestroy ($this->simage);
Imagedestroy ($this->dimage);
}

function Crop ($dst _width, $dst _height, $mode =1, $dst _file= ") {
if ($dst _file) $this->dst_file= $dst _file;
$this->dimage = Imagecreatetruecolor ($dst _width, $dst _height);

$BG = Imagecolorallocatealpha ($this->dimage,255,255,255,127);
Imagefill ($this->dimage, 0, 0, $BG);
Imagecolortransparent ($this->dimage, $BG);

$ratio _w=1.0 * $DST _width/$this->src_width;
$ratio _h=1.0 * $DST _height/$this->src_height;
$ratio = 1.0;
Switch ($mode) {
Case 1://Always crop
if (($ratio _w < 1 && $ratio _h < 1) | | ($ratio _w > 1 && $ratio _h > 1)) {
$ratio = $ratio _w < $ratio _h? $ratio _h: $ratio _w;
$tmp _w = (int) ($DST _width/$ratio);
$tmp _h = (int) ($DST _height/$ratio);
$tmp _img=imagecreatetruecolor ($tmp _w, $tmp _h);
$SRC _x = (int) (($this->src_width-$tmp _w)/2);
$SRC _y = (int) (($this->src_height-$tmp _h)/2);
Imagecopy ($tmp _img, $this->simage, 0,0, $src _x, $src _y, $tmp _w, $tmp _h);
Imagecopyresampled ($this->dimage, $tmp _img,0,0,0,0, $dst _width, $dst _height, $tmp _w, $tmp _h);
Imagedestroy ($tmp _img);
}else{
$ratio = $ratio _w < $ratio _h? $ratio _h: $ratio _w;
$tmp _w = (int) ($this->src_width * $ratio);
$tmp _h = (int) ($this->src_height * $ratio);
$tmp _img=imagecreatetruecolor ($tmp _w, $tmp _h);
Imagecopyresampled ($tmp _img, $this->simage,0,0,0,0, $tmp _w, $tmp _h, $this->src_width, $this->src_height);
$SRC _x = (int) ($tmp _w-$dst _width)/2;
$SRC _y = (int) ($tmp _h-$dst _height)/2;
Imagecopy ($this->dimage, $tmp _img, 0,0, $src _x, $src _y, $dst _width, $dst _height);
Imagedestroy ($tmp _img);
}
Break
Case 2://Only Small
if ($ratio _w < 1 && $ratio _h < 1) {
$ratio = $ratio _w < $ratio _h? $ratio _h: $ratio _w;
$tmp _w = (int) ($DST _width/$ratio);
$tmp _h = (int) ($DST _height/$ratio);
$tmp _img=imagecreatetruecolor ($tmp _w, $tmp _h);
$SRC _x = (int) ($this->src_width-$tmp _w)/2;
$SRC _y = (int) ($this->src_height-$tmp _h)/2;
Imagecopy ($tmp _img, $this->simage, 0,0, $src _x, $src _y, $tmp _w, $tmp _h);
Imagecopyresampled ($this->dimage, $tmp _img,0,0,0,0, $dst _width, $dst _height, $tmp _w, $tmp _h);
Imagedestroy ($tmp _img);
}elseif ($ratio _w > 1 && $ratio _h > 1) {
$DST _x = (int) abs ($DST _width-$this->src_width)/2;
$DST _y = (int) abs ($DST _height-$this->src_height)/2;
Imagecopy ($this->dimage, $this->simage, $dst _x, $dst _y,0,0, $this->src_width, $this->src_height);
}else{
$src _x=0, $dst _x=0, $src _y=0; $dst _y=0;
if (($dst _width-$this->src_width) < 0) {
$SRC _x = (int) ($this->src_width-$dst _width)/2;
$DST _x = 0;
}else{
$src _x = 0;
$DST _x = (int) ($DST _width-$this->src_width)/2;
}

if (($dst _height-$this->src_height) < 0) {
$SRC _y = (int) ($this->src_height-$dst _height)/2;
$DST _y = 0;
}else{
$src _y = 0;
$DST _y = (int) ($DST _height-$this->src_height)/2;
}
Imagecopy ($this->dimage, $this->simage, $dst _x, $dst _y, $src _x, $src _y, $this->src_width, $this->src_ height);
}
Break
Case 3://Keep all image size and create need size
if ($ratio _w > 1 && $ratio _h > 1) {
$DST _x = (int) (ABS ($DST _width-$this->src_width)/2);
$DST _y = (int) (ABS ($DST _height-$this->src_height)/2);
Imagecopy ($this->dimage, $this->simage, $dst _x, $dst _y,0,0, $this->src_width, $this->src_height);
}else{
$ratio = $ratio _w > $ratio _h? $ratio _h: $ratio _w;
$tmp _w = (int) ($this->src_width * $ratio);
$tmp _h = (int) ($this->src_height * $ratio);
$tmp _img=imagecreatetruecolor ($tmp _w, $tmp _h);
Imagecopyresampled ($tmp _img, $this->simage,0,0,0,0, $tmp _w, $tmp _h, $this->src_width, $this->src_height);
$DST _x = (int) (ABS ($tmp _w-$DST _width)/2);
$DST _y = (int) (ABS ($tmp _h-$DST _height)/2);
Imagecopy ($this->dimage, $tmp _img, $dst _x, $dst _y,0,0, $tmp _w, $tmp _h);
Imagedestroy ($tmp _img);
}
Break
Case 4://Keep all image but create actually size
if ($ratio _w > 1 && $ratio _h > 1) {
$this->dimage = Imagecreatetruecolor ($this->src_width, $this->src_height);
Imagecopy ($this->dimage, $this->simage,0,0,0,0, $this->src_width, $this->src_height);
}else{
$ratio = $ratio _w > $ratio _h? $ratio _h: $ratio _w;
$tmp _w = (int) ($this->src_width * $ratio);
$tmp _h = (int) ($this->src_height * $ratio);
$this->dimage = Imagecreatetruecolor ($tmp _w, $tmp _h);
Imagecopyresampled ($this->dimage, $this->simage,0,0,0,0, $tmp _w, $tmp _h, $this->src_width, $this->src_ height);
}
Break
}
}//End Crop


}
?>

PHP cropping pictures