怎么实现摄像头全屏

Question

如下代码怎么让摄像头全屏
form1.cs        private void Form1_Load(object sender, EventArgs e)
        {
            w = Screen.AllScreens[0].Bounds.Width;
            h = Screen.AllScreens[0].Bounds.Height;
            b_play.Enabled = false;
            b_stop.Enabled = true;
            panelPreview.Size = new Size(1024, 768);
            wc = new WebCamera(panelPreview.Handle, panelPreview.Width, panelPreview.Height);
            wc.StartWebCam();
        }
showvideo.cs          public void StartWebCam()
          {
              byte[] lpszName = new byte[100];
              byte[] lpszVer = new byte[100];              showVideo.capGetDriverDescriptionA(0, lpszName, 100, lpszVer, 100);
              this.lwndC = showVideo.capCreateCaptureWindowA(lpszName, showVideo.WS_VISIBLE | showVideo.WS_CHILD, 0, 0, mWidth, mHeight, mControlPtr, 0);              if (this.capDriverConnect(this.lwndC, 0))
              {
                  this.capPreviewRate(this.lwndC, 66);
                  this.capPreview(this.lwndC, true);
                  showVideo.bitmapinfo bitmapinfo = new showVideo.bitmapinfo();
                  bitmapinfo.bmiHeader.biSize = showVideo.SizeOf(bitmapinfo.bmiHeader);
                  bitmapinfo.bmiHeader.biWidth = 352;
                  bitmapinfo.bmiHeader.biHeight = 288;
                  bitmapinfo.bmiHeader.biPlanes = 1;
                  bitmapinfo.bmiHeader.biBitCount = 24;
                  this.capSetVideoFormat(this.lwndC, ref    bitmapinfo, showVideo.SizeOf(bitmapinfo));
                  this.mFrameEventHandler = new showVideo.FrameEventHandler(FrameCallBack);
                  this.capSetCallbackOnFrame(this.lwndC, this.mFrameEventHandler);
                  showVideo.SetWindowPos(this.lwndC, 0, 0, 0, mWidth, mHeight, 6);
              }          }

Answer 1

我晕
wc = new WebCamera(panelPreview.Handle, panelPreview.Width, panelPreview.Height);
你这个传递的参数是：预览框句柄，预览框宽，预览框高
你只需要将预览框设置成和屏幕同样大小，就OK

Answer 2

panelPreview仅仅是某个panel控件的名称

Answer 3

this.lwndC = showVideo.capCreateCaptureWindowA(lpszName, showVideo.WS_VISIBLE | showVideo.WS_CHILD, 0, 0, mWidth, mHeight, mControlPtr, 0);mWidth 宽
mHeight 高

Answer 4

在构造函数里就已经定义了，是form1应用了
          public WebCamera(IntPtr handle, int width, int height)
          {
              mControlPtr = handle;
              mWidth = width;
              mHeight = height;
          }

Answer 5

得到视频大小后,resize到新的picturebox里

Answer 6

试了下,改变mWidth和mHeight  我这里可以缩放
showVideo.SetWindowPos(this.lwndC, 0, 0, 0, mWidth, mHeight, 6);

Answer 7

呵呵，修改显示视频窗口的大小不就可以了么~[align=center]*********************************************************** 
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Answer 8

/*
 * Title: Webcam Monitor
 * Author: Ahsun
 * Date: April 22, 2010
 * Email: [email protected]
 * MSN: [email protected]
 */
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Threading;
using System.IO;
namespace WebcamMini
{
    public partial class Webcam : Form
    {
        public Webcam()
        {
            InitializeComponent();
        }
        const short WM_CAP = 1024;
        const int WM_CAP_DRIVER_CONNECT = WM_CAP + 10;
        const int WM_CAP_DRIVER_DISCONNECT = WM_CAP + 11;
        const int WM_CAP_EDIT_COPY = WM_CAP + 30;
        const int WM_CAP_SET_PREVIEW = WM_CAP + 50;
        const int WM_CAP_SET_PREVIEWRATE = WM_CAP + 52;
        const int WM_CAP_SET_SCALE = WM_CAP + 53;
        const int WS_CHILD = 1073741824;
        const int WS_VISIBLE = 268435456;
        const short SWP_NOMOVE = 2;
        const short SWP_NOSIZE = 1;
        const short SWP_NOZORDER = 4;
        const short HWND_BOTTOM = 1;
        int iDevice = 0;
        int hHwnd;
        [System.Runtime.InteropServices.DllImport("user32", EntryPoint = "SendMessageA")]
        static extern int SendMessage(int hwnd, int wMsg, int wParam, [MarshalAs(UnmanagedType.AsAny)] 
            object lParam);
        [System.Runtime.InteropServices.DllImport("user32", EntryPoint = "SetWindowPos")]
        static extern int SetWindowPos(int hwnd, int hWndInsertAfter, int x, int y, int cx, int cy, int wFlags);
        [System.Runtime.InteropServices.DllImport("user32")]
        static extern bool DestroyWindow(int hndw);
        [System.Runtime.InteropServices.DllImport("avicap32.dll")]
        static extern int capCreateCaptureWindowA(string lpszWindowName, int dwStyle, int x, int y, int nWidth, short nHeight, int hWndParent, int nID);
        [System.Runtime.InteropServices.DllImport("avicap32.dll")]
        static extern bool capGetDriverDescriptionA(short wDriver, string lpszName, int cbName, string lpszVer, int cbVer);
        private void OpenPreviewWindow()
        {
            //注意我下面的picCapuure是一个pictureBox，它的的Dock属性是Fill的，这样就可以自动的全屏了，而且可以自己拖动大小
            int iHeight = this.picCapture.Height ; // 高
            int iWidth = this.picCapture.Width;  // 宽
            // 
            //  Open Preview window in picturebox
            // 
            hHwnd = capCreateCaptureWindowA(iDevice.ToString(), (WS_VISIBLE | WS_CHILD), 0, 0, 640, 480, picCapture.Handle.ToInt32(), 0);
            // 
            //  Connect to device
            // 
            if (SendMessage(hHwnd, WM_CAP_DRIVER_CONNECT, iDevice, 0) == 1)
            {
                // 
                // Set the preview scale
                // 
                SendMessage(hHwnd, WM_CAP_SET_SCALE, 1, 0);
                // 
                // Set the preview rate in milliseconds
                // 
                SendMessage(hHwnd, WM_CAP_SET_PREVIEWRATE, 66, 0);
                // 
                // Start previewing the image from the camera
                // 
                SendMessage(hHwnd, WM_CAP_SET_PREVIEW, 1, 0);
                // 
                //  Resize window to fit in picturebox
                // 
                SetWindowPos(hHwnd, HWND_BOTTOM, 0, 0, iWidth, iHeight, (SWP_NOMOVE | SWP_NOZORDER));
            }
            else
            {
                // 
                //  Error connecting to device close window
                //  
                DestroyWindow(hHwnd);
            }
        }
        private void ClosePreviewWindow()
        {
            // 
            //  Disconnect from device
            // 
            SendMessage(hHwnd, WM_CAP_DRIVER_DISCONNECT, iDevice, 0);
            // 
            //  close window
            // 
            DestroyWindow(hHwnd);
        }        private void TakePhotos()
        {
            // TODO: ....
        }
        //FileStream Files = new FileStream(@"D:/a.jpg", FileMode.Create);
        //Bitmap bmpobj = new Bitmap(200, 200);
        //Graphics g;
        //Pen RedPen = new Pen(Color.Red, 1);
        //bool bdrawing;
        //int m_MouseX, m_MouseY;
        private void Webcam_Load(object sender, EventArgs e)
        {
            OpenPreviewWindow();
            //g = Graphics.FromImage(bmpobj);
            //g.Clear(Color.White);
        }        private void Webcam_Resize(object sender, EventArgs e)
        {
            if (this.WindowState == System.Windows.Forms.FormWindowState.Minimized)
            {
                this.Visible = false;
            }
            else
            {
                this.Visible = true;
            }
        }        private void notifyIcon1_DoubleClick(object sender, EventArgs e)
        {
            this.Visible = true;
            this.WindowState = System.Windows.Forms.FormWindowState.Normal;  
        }        private void Webcam_SizeChanged(object sender, EventArgs e)
        {
            ClosePreviewWindow();            OpenPreviewWindow();
        }
        private void Webcam_KeyPress(object sender, KeyPressEventArgs e)
        {
            //MessageBox.Show("heh");
            //Bitmap bmp = new Bitmap(picCapture.Width, picCapture.Height);
            //Graphics g = Graphics.FromImage(bmp);            //picCapture.Image = bmp;
            //bmp.Save("D:\\test.jpg");
                        //picCapture.Image.Save("D:\\test.jpg");
            //System.Drawing.Image bitmap = new System.Drawing.Bitmap(picCapture.Width, picCapture.Height);
            //bmpobj.Save(Files, System.Drawing.Imaging.ImageFormat.Jpeg);
            //bmpobj.Dispose();
            //g.Dispose();
        }
    }
}

Answer 9

上面是我改网上的一个例子，相信能帮到LZ给lz一些想法