PHP-generated thumbnail class Code _php tutorial

/**
* Function: Generate thumbnail image
* Author: phpox
* Date: Thu 09:57:05 CST 2007
*/

Class Creatminiature
{
Public variables
var $srcFile = ""; Original
var $echoType; Output picture type, link--not saved as file; file--saved as File
var $im = ""; Temp variable
var $srcW = ""; Original width
var $srcH = ""; Original height

Setting variables and initialization
function SetVar ($srcFile, $echoType)
{
if (!file_exists ($srcFile)) {
echo ' source picture file does not exist! ';
Exit ();
}
$this->srcfile= $srcFile;
$this->echotype= $echoType;

$info = "";
$data = getimagesize ($this->srcfile, $info);
Switch ($data [2])
{
Case 1:
if (!function_exists ("Imagecreatefromgif")) {
echo "Your GD library cannot use GIF format pictures, please use JPEG or PNG format!" Return ";
Exit ();
}
$this->im = imagecreatefromgif ($this->srcfile);
Break
Case 2:
if (!function_exists ("Imagecreatefromjpeg")) {
echo "Your GD library can not use JPEG format pictures, please use other format pictures!" Return ";
Exit ();
}
$this->im = imagecreatefromjpeg ($this->srcfile);
Break
Case 3:
$this->im = imagecreatefrompng ($this->srcfile);
Break
}
$this->srcw=imagesx ($this->im);
$this->srch=imagesy ($this->im);
}

To create a distorted shape thumbnail
function Distortion ($toFile, $toW, $toH)
{
$CIMG = $this->creatimage ($this->im, $toW, $toH, 0,0,0,0, $this->SRCW, $this->srch);
return $this->echoimage ($CIMG, $toFile);
Imagedestroy ($CIMG);
}

To generate a proportionally scaled thumbnail
function prorate ($toFile, $toW, $toH)
{
$toWH = $toW/$toH;
$srcWH = $this->srcw/$this->srch;
if ($toWH <= $srcWH)
{
$ftoW = $toW;
$ftoH = $ftoW * ($this->srch/$this-&GT;SRCW);
}
Else
{
$ftoH = $toH;
$ftoW = $ftoH * ($this->srcw/$this->srch);
}
if ($this->srcw> $toW | | $this->srch> $toH)
{
$CIMG = $this->creatimage ($this->im, $ftoW, $ftoH, 0,0,0,0, $this-&GT;SRCW, $this->srch);
return $this->echoimage ($CIMG, $toFile);
Imagedestroy ($CIMG);
}
Else
{
$CIMG = $this->creatimage ($this->im, $this-&GT;SRCW, $this->srch,0,0,0,0, $this-&GT;SRCW, $this->srch);
return $this->echoimage ($CIMG, $toFile);
Imagedestroy ($CIMG);
}
}

Generate the smallest cropped thumbnail
function Cut ($toFile, $toW, $toH)
{
$toWH = $toW/$toH;
$srcWH = $this->srcw/$this->srch;
if ($toWH <= $srcWH)
{
$ctoH = $toH;
$ctoW = $ctoH * ($this->srcw/$this->srch);
}
Else
{
$ctoW = $toW;
$ctoH = $ctoW * ($this->srch/$this-&GT;SRCW);
}
$ALLIMG = $this->creatimage ($this->im, $ctoW, $ctoH, 0,0,0,0, $this-&GT;SRCW, $this->srch);
$CIMG = $this->creatimage ($allImg, $toW, $toH, 0,0, ($ctoW-$toW)/2, ($ctoH-$toH)/2, $toW, $toH);
return $this->echoimage ($CIMG, $toFile);
Imagedestroy ($CIMG);
Imagedestroy ($ALLIMG);
}

Create a thumbnail of the background fill
function Backfill ($toFile, $toW, $toH, $BK 1=255, $BK 2=255, $BK 3=255)
{
$toWH = $toW/$toH;
$srcWH = $this->srcw/$this->srch;
if ($toWH <= $srcWH)
{
$ftoW = $toW;
$ftoH = $ftoW * ($this->srch/$this-&GT;SRCW);
}
Else
{
$ftoH = $toH;
$ftoW = $ftoH * ($this->srcw/$this->srch);
}
if (function_exists ("Imagecreatetruecolor"))
{
@ $cImg =imagecreatetruecolor ($toW, $toH);
if (! $cImg)
{
$CIMG =imagecreate ($toW, $toH);
}
}
Else
{
$CIMG =imagecreate ($toW, $toH);
}
$backcolor = Imagecolorallocate ($cImg, $BK 1, $BK 2, $BK 3); The background color of the fill
Imagefilledrectangle ($CIMG, 0,0, $toW, $toH, $backcolor);
if ($this->srcw> $toW | | $this->srch> $toH)
{
$PROIMG = $this->creatimage ($this->im, $ftoW, $ftoH, 0,0,0,0, $this-&GT;SRCW, $this->srch);
if ($ftoW < $toW)
{
Imagecopy ($CIMG, $PROIMG, ($toW-$ftoW)/2,0,0,0, $ftoW, $ftoH);
}
else if ($ftoH < $toH)
{
Imagecopy ($CIMG, $PROIMG, 0, ($toH-$ftoH)/2,0,0, $ftoW, $ftoH);
}
Else
{
Imagecopy ($CIMG, $PROIMG, 0,0,0,0, $ftoW, $ftoH);
}
}
Else
{
Imagecopymerge ($CIMG, $this->im, ($toW-$ftoW)/2, ($toH-$ftoH)/2,0,0, $ftoW, $ftoH, 100);
}
return $this->echoimage ($CIMG, $toFile);
Imagedestroy ($CIMG);
}


function Creatimage ($img, $creatW, $creatH, $dstX, $dstY, $srcX, $srcY, $srcImgW, $srcImgH)
{
if (function_exists ("Imagecreatetruecolor"))
{
@ $creatImg = Imagecreatetruecolor ($creatW, $creatH);
if ($CREATIMG)
Imagecopyresampled ($CREATIMG, $img, $dstX, $dstY, $srcX, $srcY, $creatW, $creatH, $srcImgW, $srcImgH);
Else
{
$CREATIMG =imagecreate ($creatW, $creatH);
Imagecopyresized ($CREATIMG, $img, $dstX, $dstY, $srcX, $srcY, $creatW, $creatH, $srcImgW, $srcImgH);
}
}
Else
{
$CREATIMG =imagecreate ($creatW, $creatH);
Imagecopyresized ($CREATIMG, $img, $dstX, $dstY, $srcX, $srcY, $creatW, $creatH, $srcImgW, $srcImgH);
}
return $CREATIMG;
}

Output picture, link---only output, do not save the file. file--Save As File
function Echoimage ($img, $to _file)
{
Switch ($this->echotype)
{
Case "link":
if (function_exists (' imagejpeg ')) return imagejpeg ($IMG);
else return imagepng ($img);
Break
Case "File":
if (function_exists (' imagejpeg ')) return imagejpeg ($img, $to _file);
else return imagepng ($img, $to _file);
Break
}
}
}
?>

http://www.bkjia.com/PHPjc/319502.html www.bkjia.com true http://www.bkjia.com/PHPjc/319502.html techarticle PHP/** * Features: Generate thumbnails * Author: phpox * Date: Thu may 09:57:05 CST */class Creatminiature {//public variable var $srcFile = "";//Original Figure Var $echoType; Output Picture ...

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