using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Linq;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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namespace DetectorUtils.Captures
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{
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public class CaptureAuto
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{
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public CaptureAuto(double frameRate, Action<Bitmap> captureCallback)
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:this(frameRate,captureCallback,-1,-1,-1,-1)
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{
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}
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public CaptureAuto(double frameRate, Action<Bitmap> captureCallback, Int32 startX, Int32 startY, Int32 width, Int32 height)
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{
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this.frameRate = frameRate;
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this.captureCallback = captureCallback;
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this.Status = CaptureStatus.Stop;
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this.AreaStartX = startX;
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this.AreaStartY = startY;
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this.AreaWidth = width;
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this.AreaHeight = height;
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Int32 screenWidth;
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Int32 screenHeight;
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Utils.GetWindowSize(out screenWidth, out screenHeight);
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if (startX >= 0 && startY >= 0 && width > 0 && height > 0 && (startX + width) <= screenWidth && (startY + height) <= screenHeight)
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{
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captureArea = true;
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}
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else
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{
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captureArea = false;
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}
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}
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private CancellationTokenSource CancellationSource;//取消源
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private double frameRate = 30d;//30帧
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private Action<Bitmap> captureCallback;//回调
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private DateTime time = DateTime.Now;
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private bool captureArea = false;//是否只截取一部分画面
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public Int32 AreaStartX=0;
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public Int32 AreaStartY=0;
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public Int32 AreaWidth=0;
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public Int32 AreaHeight=0;
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/// <summary>
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/// 状态
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/// </summary>
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public CaptureStatus Status
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{
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get;
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private set;
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}
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public void Start()
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{
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if (this.Status == CaptureStatus.Stop)
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{
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CancellationSource = new CancellationTokenSource();
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ThreadPool.QueueUserWorkItem(AutoCapture, CancellationSource.Token);
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Status = CaptureStatus.Captureing;
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}
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}
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public void Stop()
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{
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if (CancellationSource != null&&Status==CaptureStatus.Captureing)
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{
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CancellationSource.Cancel();
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CancellationSource = null;
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Status = CaptureStatus.Stop;
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}
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}
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/// <summary>
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/// 改变大小
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/// </summary>
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public void Resize(Int32 width,Int32 height)
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{
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Int32 screenWidth = 0;
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Int32 screenHeight = 0;
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Utils.GetWindowSize(out screenWidth, out screenHeight);
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if (width <= 0 || (this.AreaStartX + width) > screenWidth)
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{
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this.AreaWidth = screenWidth - this.AreaStartX;
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}
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else
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{
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this.AreaWidth = width;
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}
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if (height <= 0 || (this.AreaStartY + height) > screenHeight)
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{
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this.AreaHeight = screenHeight - this.AreaStartY;
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}
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else
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{
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this.AreaHeight = height;
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}
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}
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/// <summary>
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/// 移动到指定位置
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/// </summary>
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public void MoveTo(Int32 x,Int32 y)
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{
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Int32 screenWidth = 0;
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Int32 screenHeight = 0;
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Utils.GetWindowSize(out screenWidth, out screenHeight);
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if (x < 0 || x > screenWidth)
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{
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this.AreaStartX = 0;
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}
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else
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{
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this.AreaStartX = x;
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}
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if (y < 0 || y > screenHeight)
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{
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this.AreaStartY = 0;
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}
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else
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{
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this.AreaStartY = y;
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}
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if ((this.AreaStartX + this.AreaWidth) > screenWidth)
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{
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this.AreaStartX = screenWidth - this.AreaWidth;
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}
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if ( (this.AreaStartY + this.AreaHeight) > screenHeight)
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{
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this.AreaStartY = screenHeight - this.AreaHeight;
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}
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}
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/// <summary>
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/// 自动截屏
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/// </summary>
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/// <param name="obj"></param>
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private void AutoCapture(object obj)
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{
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double d = 1000d / frameRate;
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CancellationToken token = (CancellationToken)obj;
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while (!token.IsCancellationRequested)
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{
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double ts = (DateTime.Now - time).TotalMilliseconds;
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if (ts < d)
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{
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Thread.Sleep((Int32)(d - ts));
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continue;
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}
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Bitmap bitmap = null;
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if (captureArea)
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{
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bitmap = ScreenCapture.CaptureScreen(this.AreaStartX, this.AreaStartY, this.AreaWidth, this.AreaHeight);
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}
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else
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{
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bitmap = ScreenCapture.CaptureScreen();
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}
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if (this.captureCallback != null)
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{
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this.captureCallback(bitmap);
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}
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time = DateTime.Now;
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}
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}
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public enum CaptureStatus : byte
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{
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Stop,//停止状态
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Captureing//截屏状态
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}
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}
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}
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