【发布时间】:2011-06-23 14:13:02
【问题描述】:
我正在使用位图数据 api 来允许用户使用他们的网络摄像头捕捉图像,编辑它并将它保存到他们的硬盘。
我已经成功地使用变换矩阵裁剪了位图数据,但问题是应用于捕获图像的任何变换(使用 Senocular 的变换工具)都不会反映在保存的图像中。这显然与 .draw 命令有关,但我不知道是什么?
如何获取位图数据 .draw 以反映缩放和旋转变换,应用于捕获的图像?
您可以在以下位置查看应用程序:http://s46264.gridserver.com/dev/dave/pb-photo/index.html (只需单击捕获的图像即可启用缩放/旋转工具) 和源/类压缩在:http://s46264.gridserver.com/dev/dave/pb-photo/pb-photo.zip
任何澄清将不胜感激。
谢谢
代码是:
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.Sprite;
import flash.geom.Matrix;
import flash.net.FileReference;
import com.adobe.images.JPGEncoder;
import com.senocular.display.transform.*;
// create container for captured image to apply Transform Tool to
var box:Sprite = new Sprite();
addChild(box);
box.graphics.beginFill(0xAACCDD);
box.graphics.drawRect(-160, -120, 320, 240); // xreg, yreg, width, height (x-y = width-height / 2 to set centered registration point)
box.x = 520;
box.y = 140;
// create the Transform Tool
var tool:TransformTool = new TransformTool(new ControlSetStandard());
addChild(tool);
// select the box with the transform tool when clicked.
// deselect when clicking on the stage
box.addEventListener(MouseEvent.MOUSE_DOWN, tool.select);
stage.addEventListener(MouseEvent.MOUSE_DOWN, tool.deselect);
var snd:Sound = new camerasound(); //new sound instance for the "capture" button click
var bandwidth:int = 0; // Maximum amount of bandwidth that the current outgoing video feed can use, in bytes per second.
var quality:int = 100; // This value is 0-100 with 1 being the lowest quality.
var cam:Camera = Camera.getCamera();
cam.setQuality(bandwidth, quality);
cam.setMode(320,240,30,false); // setMode(videoWidth, videoHeight, video fps, favor area)
var video:Video = new Video();
video.attachCamera(cam);
video.x = 20;
video.y = 20;
addChild(video);
var bitmapData:BitmapData = new BitmapData(video.width,video.height);
var bitmap:Bitmap = new Bitmap(bitmapData);
bitmap.x = -160;
bitmap.y = -120;
box.addChild(bitmap);
capture_mc.buttonMode = true;
capture_mc.addEventListener(MouseEvent.CLICK,captureImage);
function captureImage(e:MouseEvent):void {
snd.play();
bitmapData.draw(video);
save_mc.buttonMode = true;
save_mc.addEventListener(MouseEvent.CLICK, onSaveJPG);
save_mc.alpha = 1;
}
save_mc.alpha = .5;
var crop:Matrix = new Matrix();
crop.createBox(1, 1, 0, box.x-crop_mc.x, box.y-crop_mc.y);
function onSaveJPG(e:Event):void{
var bmp:BitmapData = new BitmapData(crop_mc.width, crop_mc.height, true);
bmp.draw(box, crop);
var encoder:JPGEncoder = new JPGEncoder(100);
// Save the encoded byte array to a local file.
var f:FileReference = new FileReference();
f.save( encoder.encode(bmp), "imagem.jpg" );
}
【问题讨论】:
标签: flash actionscript-3 bitmapdata