代码如下 复制代码
/*************************************** *作者：落梦天蝎（beluckly）
*完成时间：2006-12-18
*类名：creatminiature
*功能：生成多种类型的缩略图
*基本参数：$srcfile,$echotype
*方法用到的参数：
$tofile,生成的文件
$tow,生成的宽
$toh,生成的高
$bk1,背景颜色参数 以255为最高
$bk2,背景颜色参数
$bk3,背景颜色参数
*例子：
include(thumb.php);
$cm=new creatminiature();
$cm->setvar(1.jpg,file);
$cm->distortion(dis_bei.jpg,150,200);
$cm->prorate(pro_bei.jpg,150,200);
$cm->cut(cut_bei.jpg,150,200);
$cm->backfill(fill_bei.jpg,150,200);
***************************************/
class creatminiature
{
//公共变量
var $srcfile=; //原图
var $echotype; //输出图片类型，link--不保存为文件；file--保存为文件
var $im=; //临时变量
var $srcw=; //原图宽
var $srch=; //原图高
//设置变量及初始化
function setvar($srcfile,$echotype)
{
$this->srcfile=$srcfile;
$this->echotype=$echotype;
$info = ;
$data = getimagesize($this->srcfile,$info);
switch ($data[2]) {
case 1:
if(!function_exists(imagecreatefromgif)){
echo 你的gd库不能使用gif格式的图片，请使用jpeg或png格式！返回;
exit();
}
$this->im = imagecreatefromgif($this->srcfile);
break;
case 2:
if(!function_exists(imagecreatefromjpeg)){
echo 你的gd库不能使用jpeg格式的图片，请使用其它格式的图片！返回;
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);
}
//生成扭曲型缩图
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);
}
//生成按比例缩放的缩图
function prorate($tofile,$tow,$toh)
{
$towh=$tow/$toh;
$srcwh=$this->srcw/$this->srch;
if($towh {
$ftow=$tow;
$ftoh=$ftow*($this->srch/$this->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->srcw,$this->srch);
return $this->echoimage($cimg,$tofile);
imagedestroy($cimg);
}
else
{
$cimg=$this->creatimage($this->im,$this->srcw,$this->srch,0,0,0,0,$this->srcw,$this->srch);
return $this->echoimage($cimg,$tofile);
imagedestroy($cimg);
}
}
//生成最小裁剪后的缩图
function cut($tofile,$tow,$toh)
{
$towh=$tow/$toh;
$srcwh=$this->srcw/$this->srch;
if($towh {
$ctoh=$toh;
$ctow=$ctoh*($this->srcw/$this->srch);
}
else
{
$ctow=$tow;
$ctoh=$ctow*($this->srch/$this->srcw);
}
$allimg=$this->creatimage($this->im,$ctow,$ctoh,0,0,0,0,$this->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($allimg);
}
//生成背景填充的缩图
function backfill($tofile,$tow,$toh,$bk1=255,$bk2=255,$bk3=255)
{
$towh=$tow/$toh;
$srcwh=$this->srcw/$this->srch;
if($towh {
$ftow=$tow;
$ftoh=$ftow*($this->srch/$this->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, $bk1, $bk2, $bk3); //填充的背景颜色
imagefilledrectangle($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->srcw,$this->srch);
/*
if($ftow {
imagecopymerge($cimg,$proimg,($tow-$ftow)/2,0,0,0,$ftow,$ftoh,100);
}
else if($ftoh {
imagecopymerge($cimg,$proimg,0,($toh-$ftoh)/2,0,0,$ftow,$ftoh,100);
}
*/
if($ftow {
imagecopy($cimg,$proimg,($tow-$ftow)/2,0,0,0,$ftow,$ftoh);
}
else if($ftoh {
imagecopy($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 $creatimg;
}
//输出图片，link---只输出，不保存文件。file--保存为文件
function echoimage($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/632961.htmlwww.bkjia.comtruehttp://www.bkjia.com/phpjc/632961.htmltecharticle一个php智能把图片生成缩略图类,可自动根据你图片的大小生成等比例的图片哦，有需要的朋友可参考参考。 代码如下 复制代码 ?php /******...