php 截图（可预览） crop images thumb jcrop/asido
jcrop + asido
index.php
<?php
$targ_w = 90; // thumb width size
$targ_h = 89; // thumb height size
$filename = $_GET['file'];
if($filename)
{
$abs = '/home/www';
$fullsrc = '/public/images/'.$filename; // absolute path of original image uploaded
$thumbsrc = '/public/images/thumb-'.$filename; // absolute path of thumb image you want
$fullroot = $abs.$fullsrc;
$thumbroot = $abs.$thumbsrc;
if ($_SERVER['REQUEST_METHOD'] == 'POST')
{
include('asido/class.asido.php');
asido::driver('gd');
$i1 = asido::image($fullroot, $thumbroot);
Asido::Crop($i1, $_POST['x'], $_POST['y'], $_POST['w'], $_POST['h']);
$i1->save(ASIDO_OVERWRITE_ENABLED);
// if you want to make resize via scale automatically, or you can remove it
$i1 = asido::image($thumbroot, $thumbroot);
Asido::resize($i1, $targ_w, $targ_h, ASIDO_RESIZE_STRETCH);
$i1->save(ASIDO_OVERWRITE_ENABLED);
exit('<img src="'.$thumbsrc.'" /><br><a href="?file='.$filename.'&sv='.time().'">Create Thumbnail Again</a>');
}
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Add a New WithStars</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="description" content="GLS PHP Framework">
<meta name="author" content="GLS">
<meta http-equiv="X-UA-Compatible" content="IE=8" />
<meta http-equiv="pragma" content="no-cache" />
<meta http-equiv="Cache-Control" content="no-cache, must-revalidate" />
<meta http-equiv="expires" content="Thu, 01 Jan 1970 00:00:01 GMT" />
<meta http-equiv="expires" content="0" />
<script type="text/javascript" src="js/jquery.js"></script>
<script language="JavaScript" type="text/javascript" src="js/jcrop.js"></script>
<script>
jQuery(function($){
// Create variables (in this scope) to hold the API and image size
var jcrop_api, boundx, boundy;
$('#cropbox').Jcrop({
onChange: updatePreview,
onSelect: updatePreview,
aspectRatio: 1
},function(){
// Use the API to get the real image size
var bounds = this.getBounds();
boundx = bounds[0];
boundy = bounds[1];
// Store the API in the jcrop_api variable
jcrop_api = this;
});
function updatePreview(c)
{
if (parseInt(c.w) > 0)
{
$('#x').val(c.x);
$('#y').val(c.y);
var rx = <?=$targ_w?> / c.w;
var ry = <?=$targ_h?> / c.h;
$('#w').val(c.w);
$('#h').val(c.h);
// if you don't want to preview, you can remove it
$('#preview').css({
width: Math.round(rx * boundx) + 'px',
height: Math.round(ry * boundy) + 'px',
marginLeft: '-' + Math.round(rx * c.x) + 'px',
marginTop: '-' + Math.round(ry * c.y) + 'px'
});
}
};
function checkCoords()
{
if (parseInt($('#w').val())) return true;
alert('Please select a crop region then press submit.');
return false;
};
});
</script>
<link href="css/jcrop.css" rel="stylesheet" type="text/css" />
<body>
<form method="post" onsubmit="return checkCoords();">
<table>
<tr>
<td><img src="<?=$fullsrc?>" id="cropbox" /></td>
<td>
<h4>Preview pane:</h4>
<div style="overflow: hidden; width: <?=$targ_w?>px; height: <?=$targ_h?>px;border:#ccc 1px solid;padding:3px;"><img id="preview" src="<?=$fullsrc?>"/></div>
<div style="margin:5px;"><input type="submit" name="crop" value="Crop Image" /></div>
</td>
</tr>
</table>
<div style="margin:5px;">
<input type="hidden" id="x" name="x" />
<input type="hidden" id="y" name="y" />
<input type="hidden" id="w" name="w" />
<input type="hidden" id="h" name="h" />
</div>
</form>
</body>
</html>
<?php }?>
jcrop.css
.jcrop-holder { text-align: left; }
.jcrop-vline, .jcrop-hline
{
font-size: 0;
position: absolute;
background: white url('jcrop.gif') top left repeat;
}
.jcrop-vline { height: 100%; width: 1px !important; }
.jcrop-hline { width: 100%; height: 1px !important; }
.jcrop-handle {
font-size: 1px;
width: 7px !important;
height: 7px !important;
border: 1px #eee solid;
background-color: #333;
*width: 9px;
*height: 9px;
}
.jcrop-tracker { width: 100%; height: 100%; }
.custom .jcrop-vline,
.custom .jcrop-hline
{
background: yellow;
}
.custom .jcrop-handle
{
border-color: black;
background-color: #C7BB00;
-moz-border-radius: 3px;
-webkit-border-radius: 3px;
}
参考来源：
http://asido.info/about/features/
http://sourceforge.net/projects/asido/
http://deepliquid.com/content/Jcrop.html
http://code.google.com/p/jcrop/
转帖注明：justcoding http://justcoding.iteye.com/blog/1430913