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php结合imgareaselect实现图片裁剪

2015-07-05 16:12 756 查看

引用CSS

/js/jquery.imgareaselect-0.9.10/css/imgareaselect-default.css

引用js

/js/jquery.imgareaselect-0.9.10/scripts/jquery.imgareaselect.min.js
/js/AjaxFileUploaderV2.1/ajaxfileupload.js

html

<div>
<img src='blank.jpg' id="mainimg">
</div>
<div id="myPreview" >
<img src="blank.jpg" id="mainimgthumb" />
</div>
<form name="fmCrop">
<input type="hidden" name="src_path" value="" />
<input type="hidden" name="x1" value="" />
<input type="hidden" name="x2" value="" />
<input type="hidden" name="y1" value="" />
<input type="hidden" name="y2" value="" />
<input type="submit" name="btnSubmit" class="baseinf_but1" style="display:none" value="确定" />
</form>

jQuery代码

$("#mainimg_src", content).load(function () {
crop($("#mainimg", content));
});
function crop($img) { //$img是
//缩小比例
var scalex =$img.width() / $("#mainimg_src").width();
var scaley =$img.height() / $("#mainimg_src").height();
$img.imgAreaSelect({
x1:0,y1:0,x2:150,y2:150,
handles: true, aspectRatio: '1:1',
onSelectEnd: function (img, selection) {
var scaleX = 100 / (selection.width || 1);
var scaleY = 100 / (selection.height || 1);
$('#mainimgthumb').css({
width: Math.round(scaleX * 400) + 'px',
height: Math.round(scaleY * 300) + 'px',
marginLeft: '-' + Math.round(scaleX * selection.x1) + 'px',
marginTop: '-' + Math.round(scaleY * selection.y1) + 'px'
});
$('input[name="x1"]', content).val(selection.x1/scalex);
$('input[name="y1"]', content).val(selection.y1/scaley);
$('input[name="x2"]', content).val(selection.x2/scalex);
$('input[name="y2"]', content).val(selection.y2/scaley);
}
});
}

确定裁剪

//确定剪切
$("form[name=fmCrop]", content).submit(function () {
var data = $("form[name=fmCrop]", content).serializeArray();
$.get('/members/web-members-rest/crop.html', data, function (r) {
switch (r.result) {
case "Success":
jAlert("操作成功");
$("#left_mainimg").attr("src", "/" + r.path + '?a=' + (new Date()).format('yyyyMMddhhmmss'));
$("#myPreview", content).css("display", "block");
$("#myPreview", content).prev().css("display", "none");
$("#mainimg", content).imgAreaSelect({ hide: true });
$("form[name=fmUpload]", content).css("display", "none");
$("input[name=btnSubmit]", content).css("display", "none");
break;
}
});
return false;
});

服务器端php代码

public function actionCrop($src_path,$x1,$x2,$y1,$y2){
$pic =$src_path;
$width = $x2-$x1;
$height = $y2-$y1;
$type=exif_imagetype($pic); //判断文件类型
$support_type=array(IMAGETYPE_JPEG , IMAGETYPE_PNG , IMAGETYPE_GIF);
if(!in_array($type, $support_type,true)) {
echo "this type of image does not support! only support jpg , gif or png";
exit();
}
switch($type) {
case IMAGETYPE_JPEG :
$image = imagecreatefromjpeg($pic);
break;
case IMAGETYPE_PNG :
$image = imagecreatefrompng($pic);
break;
case IMAGETYPE_GIF :
$image = imagecreatefromgif($pic);
break;
default:
echo "Load image error!";
exit();
}
$copy = $this->PIPHP_ImageCrop($image, $x1, $y1, $width, $height);//裁剪
imagejpeg($copy, $src_path); //替换新图
return ['result'=>'Success','path'=>$src_path]; //返回新图地址
}
function PIPHP_ImageCrop($image, $x, $y, $w, $h){
$tw = imagesx($image);
$th = imagesy($image);
if ($x > $tw || $y > $th || $w > $tw || $h > $th) return FALSE;
$temp = imagecreatetruecolor($w, $h);
imagecopyresampled($temp, $image, 0, 0, $x, $y, $w, $h, $w, $h);
return $temp;
}

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标签： php imgareaselect 图片裁剪

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