Aki hay uno:
Código PHP:
<?php
class Imagen {
var $entrada = "";
var $width = 0;
var $height = 0;
var $tipo = 0;
function Imagen($ent) {
$this->entrada = $ent;
list($wid, $hei, $tip) = getimagesize($ent);
$this->width = $wid;
$this->height = $hei;
$this->tipo = $tip;
}
function getThumb($w, $h, $salida, $opc = false) {
$ent = $this->entrada;
$tip = $this->tipo;
$wid = $this->width;
$hei = $this->height;
if ($w) {
$newwidth = $w;
$newheight = round(($hei / $wid) * $newwidth);
} elseif ($h) {
$newheight = $h;
$newwidth = round(($wid / $hei) * $newheight);
}
// Cargar la imagen
$thumb = imagecreatetruecolor($newwidth, $newheight);
if ($tip == 1) {
$source = imagecreatefromgif($ent);
} elseif ($tip == 2) {
$source = imagecreatefromjpeg($ent);
} elseif ($tip == 3) {
$source = imagecreatefrompng($ent);
}
// Redimensionar
imagecopyresampled($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $wid, $hei);
// Mostrar la nueva imagen
if ($opc) return $thumb;
else return imagejpeg($thumb, $salida);
}
function getNothumb($w, $h, $salida, $opc = false) {
$ent = $this->entrada;
$tip = $this->tipo;
$wid = $this->width;
$hei = $this->height;
if ($h) {
$newheight = $h;
$newwidth = round(($wid / $hei) * $newheight);
} else if ($w) {
$newwidth = $w;
$newheight = round(($hei / $wid) * $newwidth);
}
// Cargar la imagen
$thumb = imagecreatetruecolor($newwidth, $newheight);
if ($tip == 1) {
$source = imagecreatefromgif($ent);
} elseif ($tip == 2) {
$source = imagecreatefromjpeg($ent);
} elseif ($tip == 3) {
$source = imagecreatefrompng($ent);
}
// Redimensionar
imagecopyresampled($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $wid, $hei);
// Mostrar la nueva imagen
if ($opc) return $thumb;
else return imagejpeg($thumb, $salida);
}
function getCorte($we, $he, $salida, $opc = false) {
$img = $this->entrada;
$wid = $this->width;
$hei = $this->height;
$tip = $this->tipo;
if ($wid / $we > $hei / $he) {
$hp = $hei;
$wp = round(($we / $he) * $hp);
} else {
$wp = $wid;
$hp = round(($he / $we) * $wp);
}
$lp = round(($wid - $wp) / 2);
$tp = round(($hei - $hp) / 2);
$thumb = imagecreatetruecolor($we, $he);
if ($tip == 1) {
$source = imagecreatefromgif($img);
} elseif ($tip == 2) {
$source = imagecreatefromjpeg($img);
} elseif ($tip == 3) {
$source = imagecreatefrompng($img);
}
imagecopyresampled($thumb, $source, 0, 0, $lp, $tp, $we, $he, $wp, $hp);
if ($opc) return $thumb;
else return imagejpeg($thumb, $salida);
}
}
if (isset($_GET["img"])) {
$img = new Imagen($_GET["img"]);
$tip = $_GET["tip"];
$w = $_GET["w"];
$h = $_GET["h"];
header("Content-type: image/jpeg");
if ($tip == 0) {
imagejpeg($img->getThumb($w, $h, "", true));
} elseif ($tip == 1) {
imagejpeg($img->getNothumb($w, $h, "", true));
} elseif ($tip == 2) {
imagejpeg($img->getCorte($w, $h, "", true));
}
}
?>
Y para las imagenes las llamas asi:
<img src="class.imagen.php?img=imagen.jpg&tip=2&w=100&h =100" />
Mas informacion aki:
http://www.forosdelweb.com/f91/redim...on-php-665923/
Espero te sirva
