<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
<title>拍照功能实现</title>
<link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
<!--[if lt IE 9]>
<script src="https://cdn.bootcss.com/html5shiv/3.7.3/html5shiv.min.js"></script>
<script src="https://cdn.bootcss.com/respond.js/1.4.2/respond.min.js"></script>
<![endif]-->
</head>
<body>
<div class="container text-center">
<div class="row">
<div class="col-md-2">
<div id="webcam"></div>
<img style="cursor: pointer;" id="paizhao" src="./pz.png" title="点击拍照">
<div id="status"></div>
</div>
<div class="col-md-10" id="picbox" style="clear: both">
</div>
</div>
</div>
<script src="https://cdn.bootcss.com/jquery/1.12.4/jquery.min.js"></script>
<script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script src="jquery.webcam.min.js"></script>
<script type="text/javascript">
$(function () {
$("#paizhao").click(function () {
webcam.capture(3); //拍照，参数3是倒计时
});
var pos = 0, ctx = null, saveCB, image = [];
//创建画布指定宽度和高度
var canvas = document.createElement("canvas");
canvas.setAttribute('width', 320);
canvas.setAttribute('height', 240);
//如果画布成功创建
if (canvas.toDataURL) {
//设置画布为2d，未来可能支持3d
ctx = canvas.getContext("2d");
//截图320*240，即整个画布作为有效区(cutx?)
image = ctx.getImageData(0, 0, 320, 240);
saveCB = function (data) {
//把data切割为数组
var col = data.split(";");
var img = image;
//绘制图像(这里不是很理解算法)
//参数data 只是每行的数据 ，例如320*240 大小的照片，一张完整的照片下来需要240个data，每个data有320个rgb
for (var i = 0; i < 320; i++) {
//转换为十进制
var tmp = parseInt(col[i]);
img.data[pos + 0] = (tmp >> 16) & 0xff;
img.data[pos + 1] = (tmp >> 8) & 0xff;
img.data[pos + 2] = tmp & 0xff;
img.data[pos + 3] = 0xff;
pos += 4;
}
//当绘制320*240像素的图片时发给后端php
if (pos >= 4 * 320 * 240) {
//把图像放到画布上,输出为png格式
ctx.putImageData(img, 0, 0);
$.post("upload.php", {type: "data", image: canvas.toDataURL("image/png")}, function (imgsrc) {
//console.log(imgsrc);
$("#picbox").append("<img style='float: left;margin: 5px' height='240' width='320' src='" + imgsrc + "' />");
});
pos = 0;
}
};
} else {
saveCB = function (data) {
//把数据一点点的放入image[]
image.push(data);
pos += 4 * 320;
if (pos >= 4 * 320 * 240) {
$.post("upload.php", {type: "pixel", image: image.join('|')});
pos = 0;
}
};
}
$("#webcam").webcam({
width: 320,
height: 240,
mode: "callback",
swffile: "jscam_canvas_only.swf",
onSave: saveCB,
onCapture: function () {
webcam.save();
},
onTick: function (remain) {
if (0 == remain) {
$("#status").text("拍照成功!");
} else {
$("#status").text(remain + " 秒倒计时...");
}
},
debug: function (type, string) {
console.log(type + ": " + string);
}
});
// /**
// * 获取canvas画布的内容 getImageData
// * 内容放回到canvas画布 putImageData
// * 获取ImgData的每一个像素 ImgData.data
// * getImageData(起始点的横坐标, 起始点的纵坐标, 获取的宽度, 获取的高度)
// * putImageData(绘制点的横坐标, 绘制点点纵坐标, imgData的起始点横坐标, imgData的起始点纵坐标, 宽度, 高度)
// */
});
</script>
</body>
</html>
<?php
//$str = file_get_contents("php://input");
//file_put_contents("upload.jpg", pack("H*", $str));
//var_dump($_POST['image']);
if ($_POST['type'] == "pixel") {
// input is in format 1,2,3...|1,2,3...|...
$im = imagecreatetruecolor(320, 240);
foreach (explode("|", $_POST['image']) as $y => $csv) {
foreach (explode(";", $csv) as $x => $color) {
imagesetpixel($im, $x, $y, $color);
}
}
} else {
// input is in format: data:image/png;base64,...
$im = imagecreatefrompng($_POST['image']);
}
imagepng($im, "./upload/" . "circle" . time() . ".png");//保存
imagedestroy($im);
// do something with $im
//图片地址
$img = "http://ai.91xiaoyu.com/plug/picture"."/upload/" . "circle" . time() . ".png";
echo $img;
参照资料：
https://www.xarg.org/project/jquery-webcam-plugin/