FLASH摄像头拍照实现原理分析_JSP版.docx

flash摄像头拍照实现原理分析最近一段时间，由于网站的需要，做了一个在线拍照的flash，刚开始的时候也是什么都不懂，对flash也是了解点皮毛，经过不断的在网上查阅资料。经过一周的努力，终于被我搞定了。主要用到camera类，movieclip 类，bitmapdata类，loadvars类，如果要实现这个功能，必须先去了解这几个类实现的过程如下。1，先在库中新建一个视频元件，把视频元件拖放到场景中，取名为my_video，新建一个按纽元件，取名为btn_print.2，加入以下代码实现视频的播放mycam = camera.get();mycam.setmode(266,200,10);my_video.attachvideo(mycam);3 ，以下代码实现图片的获得和上传import flash.display.bitmapdata;import flash.geom.rectangle;import flash.geom.colortransform;class printscreen public var addlistener:functionpublic var broadcastmessage:functionprivate var id: number;public var record:loadvars;function printscreen() asbroadcaster.initialize( this );public function print(mc:movieclip, w:number, h:number) broadcastmessage(onstart, mc); w = math.floor(w); h = math.floor(h); var bmp:bitmapdata = new bitmapdata(w, h, false); record = new loadvars(); record.width = w record.height = h record.cols = 0 record.rows = 0 bmp.draw(mc); id = setinterval(copysource, 1, this, mc, bmp);private function copysource(scope, movie, bit) var pixel:number var str_pixel:string scope.recordpx + scope.record.rows = new array(); for(var a = 0; a = bit.height) clearinterval(scope.id) bit.dispose(); 4 以下代码在服务器段接受数据，生成图片(jsp版)string width = request.getparameter(width);string height = request.getparameter(height);int w = integer.parseint(width); int h = integer.parseint(height);try outputstream fos = response.getoutputstream(); bufferedimage bf = new bufferedimage(w, h, bufferedimage.type_int_rgb); for (int i = 0; i bf.getheight(); i+) string data = request.getparameter(px + i); string ds = data.split(,); for (int j = 0; j bf.getwidth(); j+) int d = integer.parseint(dsj, 16); bf.setrgb(j, i, d); imagewriter writer = null; imagetypespecifier type = imagetypespecifier .createfromrenderedimage(bf); iterator iter = imageio.getimagewriters(type, jpg); if (iter.hasnext() writer = (imagewriter) iter.next(); if (writer = null) return null; iioimage iioimage = new iioimage(bf, null, null); imagewriteparam param = writer.getdefaultwriteparam(); param.setcompressionmode(imagewriteparam.mode_explicit); param.setcompressionquality(0.2f); / save to file imageoutputstream outputstream2 = imageio .createimageoutputstream(response.getoutputstream(); writer.setoutput(outputstream2); writer.write(null, iioimage, param); fos.close(); catch