Html 以PNG或JPEG格式向服务器发送画布内容
我有这段代码,在执行嵌入flash页面和点击它捕获flash位图到画布上。在这里,upto可以很好地工作,但问题是如何将捕获的数据发送到画布到服务器的PNG或JPEG图像格式。 我使用Jquery网络摄像头插件和Jquery.js加载flashHtml 以PNG或JPEG格式向服务器发送画布内容,html,jsp,Html,Jsp,我有这段代码,在执行嵌入flash页面和点击它捕获flash位图到画布上。在这里,upto可以很好地工作,但问题是如何将捕获的数据发送到画布到服务器的PNG或JPEG图像格式。 我使用Jquery网络摄像头插件和Jquery.js加载flash <html> <body> <br><br> <form name="f" id="f" runat="server"><table><tr><!--<td&
<html>
<body>
<br><br>
<form name="f" id="f" runat="server"><table><tr><!--<td><div id="eflash">
</div></td>-->
<td>
<div id="webcam">
</div></td><td><canvas style="border:2px solid red" id="canvas" width="320" height="240">
</canvas>
</td></tr></table>
<br><p><a href="javascript:webcam.capture();void(0);">CLICK</a>**|**<input type="button" id="sendBtn" value="Send" /></p>
</form>
</body></html>
<script type="text/javascript" src="./jquery/jquery.js"></script>
<!--<script type="text/javascript" src="./jquery/jquery.flash.js"></script>-->
<script type="text/javascript" src="./jquery/jquery.webcam.js"></script>
<!--<script>
$(document).ready(
function() {
$('#eflash').flash({src: 'jscam.swf', width: 220, height: 140 });
}
);
</script>-->
<script type="text/javascript">
var pos = 0;
var ctx = null;
var cam = null;
var image = null;
jQuery("#webcam").webcam({
width: 320,
height: 240,
mode: "callback",
swffile: "jscam_canvas_only.swf",
onTick: function(remain) {
if (0 == remain)
{jQuery("#status").text("Sorria!");
}
else {
jQuery("#status").text(remain + " segundo(s) restante(s)...");
}
},
onSave: function(data)
{
var col = data.split(";");
var img = image;
for(var i = 0; i < 320; i++)
{
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;
}
if (pos >= 4 * 320 * 240)
{
ctx.putImageData(img, 0, 0);
var canvas = document.getElementById("canvas");
var save_image = canvas.toDataURL("image/jpeg");
save_image = save_image.replace(/^data:image\/(png|jpeg);base64,/, "");
$('input[name=save_image]').val(save_image);
pos = 0;
}
},
onCapture: function ()
{
jQuery("#flash").css("display", "block");
jQuery("#flash").fadeOut(100, function () {jQuery("#flash").css("opacity", 1);});
jQuery("#canvas").show();
webcam.save();
},
onLoad: function ()
{ var cams = webcam.getCameraList();
for(var i in cams) {jQuery("#cams").append("<li>" + cams[i] + "</li>");}
jQuery("#canvas").hide();}
});
function getPageSize()
{
var xScroll, yScroll;
if (window.innerHeight && window.scrollMaxY)
{
xScroll = window.innerWidth + window.scrollMaxX;
yScroll = window.innerHeight + window.scrollMaxY;
}
else
if (document.body.scrollHeight > document.body.offsetHeight)
{ // all but Explorer Mac
xScroll = document.body.scrollWidth;
yScroll = document.body.scrollHeight;
}
else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
xScroll = document.body.offsetWidth;
yScroll = document.body.offsetHeight;
}
var windowWidth, windowHeight;
if (self.innerHeight)
{ // all except Explorer
if(document.documentElement.clientWidth)
{
windowWidth = document.documentElement.clientWidth;
}
else
{
windowWidth = self.innerWidth;
}
windowHeight = self.innerHeight;
}
else
if (document.documentElement && document.documentElement.clientHeight)
{ // Explorer 6 Strict Mode
windowWidth = document.documentElement.clientWidth;
windowHeight = document.documentElement.clientHeight;
}
else
if (document.body)
{ // other Explorers
windowWidth = document.body.clientWidth;
windowHeight = document.body.clientHeight;
}
// for small pages with total height less then height of the viewport
if(yScroll < windowHeight)
{
pageHeight = windowHeight;
}
else
{
pageHeight = yScroll;
}
// for small pages with total width less then width of the viewport
if(xScroll < windowWidth)
{
pageWidth = xScroll;
}
else
{
pageWidth = windowWidth;
}
return [pageWidth, pageHeight]; }
window.addEventListener("load", function()
{
jQuery("body").append("<div id=\"flash\"></div>");
var canvas = document.getElementById("canvas");
if (canvas.getContext)
{
ctx = document.getElementById("canvas").getContext("2d");
ctx.clearRect(0, 0, 320, 240);
var img = new Image();
img.onload = function() {
ctx.drawImage(img, 320, 240);
}
image = ctx.getImageData(0, 0, 320, 240);
}
var pageSize = getPageSize();
jQuery("#flash").css({ height: pageSize[1] + "px" });
}, false);
window.addEventListener("resize", function() {
var pageSize = getPageSize();
jQuery("#flash").css({ height: pageSize[1] + "px" });
}, false);
</script>
**|**
var-pos=0;
var-ctx=null;
var-cam=null;
var-image=null;
jQuery(“网络摄像头”)。网络摄像头({
宽度:320,
身高:240,
模式:“回调”,
swffile:“jscam_canvas_only.swf”,
onTick:功能(保留){
如果(0==保持)
{jQuery(“#status”).text(“Sorria!”);
}
否则{
jQuery(“#status”).text(保留+“segundo(s)restante(s)…”);
}
},
onSave:函数(数据)
{
var col=data.split(“;”);
var img=图像;
对于(变量i=0;i<320;i++)
{
var tmp=parseInt(col[i]);
模拟数据[pos+0]=(tmp>>16)和0xff;
模拟数据[pos+1]=(tmp>>8)&0xff;
模拟数据[pos+2]=tmp&0xff;
模拟数据[pos+3]=0xff;
pos+=4;
}
如果(位置>=4*320*240)
{
ctx.putImageData(img,0,0);
var canvas=document.getElementById(“canvas”);
var save_image=canvas.toDataURL(“image/jpeg”);
保存图像=保存图像。替换(/^数据:图像\/(png | jpeg);base64,/,“”);
$('input[name=save_image]').val(save_image);
pos=0;
}
},
onCapture:function()
{
jQuery(“flash”).css(“显示”、“块”);
fadeOut(100,函数(){jQuery(#flash”).css(“不透明”,1)});
jQuery(“#canvas”).show();
webcam.save();
},
onLoad:function()
{var cams=webcam.getCameraList();
对于(cams中的变量i){jQuery(#cams”)。追加(“”+cams[i]+” ”);}
jQuery(“#canvas”).hide();}
});
函数getPageSize()
{
var xScroll,yScroll;
if(window.innerHeight&&window.scrollMaxY)
{
xScroll=window.innerWidth+window.scrollMaxX;
yScroll=window.innerHeight+window.scrollMaxY;
}
其他的
if(document.body.scrollHeight>document.body.offsetHeight)
{//除Explorer Mac外,其他所有
xScroll=document.body.scrollWidth;
yScroll=document.body.scrollHeight;
}
否则{//explorerMac…也可以在Explorer6、Mozilla和Safari中使用
xScroll=document.body.offsetWidth;
yScroll=document.body.offsetHeight;
}
var窗口宽度、窗口高度;
if(自内高度)
{//除Explorer之外的所有
if(document.documentElement.clientWidth)
{
windowWidth=document.documentElement.clientWidth;
}
其他的
{
windowWidth=self.innerWidth;
}
windowHeight=self.innerHeight;
}
其他的
if(document.documentElement&&document.documentElement.clientHeight)
{//Explorer 6严格模式
windowWidth=document.documentElement.clientWidth;
windowHeight=document.documentElement.clientHeight;
}
其他的
if(document.body)
{//其他探险家
windowWidth=document.body.clientWidth;
windowHeight=document.body.clientHeight;
}
//对于总高度小于视口高度的小页面
if(yScroll<窗高)
{
页面高度=窗口高度;
}
其他的
{
pageHeight=yScroll;
}
//对于总宽度小于视口宽度的小页面
if(xScroll
这是这个的副本吗?不不是。顺便说一句,我们怎么能做到呢!