[求助]LabWindows/CVI中,要CCD如何可以預覽?

ming6591

<>我程式中需要控制CCD來做照相的功能,我是想使用Picture這個元件來做預覽的功能以及顯示我所擷取到的影像,目前是可以達到我要擷取影像的功能,但卻無法做到能事前預覽的動作,請問板上的高手們,下方是我的程式碼!那我該做什麼修正呢?!才可以達成我想要預覽的目的呢?!</P>
<>#include &lt;windows.h&gt;
#include &lt;utility.h&gt;
#include &lt;vfw.h&gt;
#include &lt;ansi_c.h&gt;</P>
<>#include &lt;cvirte.h&gt;  
#include &lt;userint.h&gt;
#include "test3.h"</P>
<P>static int panelHandle;</P>
<P>static int winHandle ;</P>
<P>char PathName[MAX_PATHNAME_LEN] ;</P>
<P>HWND hCapWnd;  
BITMAPINFO bmi;
CAPTUREPARMS CapParms ;</P>
<P>int width , height ;</P>
<P>int main (int argc, char *argv[])
{
if (InitCVIRTE (0, argv, 0) == 0)
  return -1; /* out of memory */
if ((panelHandle = LoadPanel (0, "test3.uir", PANEL)) &lt; 0)
  return -1;</P>
<P> width = 352 ;
height = 288 ;

winHandle = GetCVIWindowHandle() ;
  
hCapWnd = capCreateCaptureWindow("Capture Window", WS_CHILD | WS_VISIBLE , 0 , 0 , width , height, (HWND)winHandle , PANEL_PICTURE); //設定CaptureWindows
capDriverConnect(hCapWnd, 0) ;//與驅動程式連結
</P>
<P> capGetVideoFormat(hCapWnd, &amp;bmi, sizeof(BITMAPINFO));
   
bmi.bmiHeader.biWidth=width;
bmi.bmiHeader.biHeight=height;
SetWindowPos (hCapWnd, 0, 0, 0, bmi.bmiHeader.biWidth,bmi.bmiHeader.biHeight,0);
SetCtrlAttribute (panelHandle , PANEL_PICTURE , ATTR_HEIGHT , bmi.bmiHeader.biHeight) ;
SetCtrlAttribute (panelHandle , PANEL_PICTURE , ATTR_WIDTH , bmi.bmiHeader.biWidth) ;  

capSetVideoFormat(hCapWnd, &amp;bmi, sizeof(BITMAPINFO)) ;

capCaptureGetSetup(hCapWnd , &amp;CapParms , sizeof(CAPTUREPARMS)) ;
CapParms.dwRequestMicroSecPerFrame = 40000;
CapParms.fLimitEnabled = FALSE;
  CapParms.fCaptureAudio = FALSE; // NO Audio
  CapParms.fMCIControl = FALSE;
  CapParms.fYield = TRUE;
  CapParms.vKeyAbort = VK_ESCAPE;
  CapParms.fAbortLeftMouse = FALSE;
  CapParms.fAbortRightMouse = FALSE; </P>
<P> capCaptureSetSetup(hCapWnd , &amp;CapParms , sizeof(CAPTUREPARMS)) ;

capDlgVideoCompression(hCapWnd);  
   
capOverlay(hCapWnd, TRUE); //使用hardware overlay使video input directly into framebuffer，使不用CPU resources.
capPreview(hCapWnd,TRUE); //抓取影像出現在視窗中
capPreviewScale(hCapWnd,TRUE); //使影像延伸到所設定的視窗大小
capPreviewRate(hCapWnd, 1000/30); //每秒影像變化張數</P>

<P>    DisplayPanel (panelHandle);
    RunUserInterface ();   
    DiscardPanel (panelHandle);
    return 0;</P>
<P>}</P>
<P>int CVICALLBACK GetImageFun (int panel, int control, int event,
  void *callbackData, int eventData1, int eventData2)
{
int i ;
  
char tmp[20] ;

int year , mon , day , hour , min , sec ;

char FileName[MAX_PATHNAME_LEN] , SaveFilePathName[MAX_PATHNAME_LEN] ;

switch (event)
  {
  case EVENT_COMMIT:
    GetSystemDate (&amp;mon , &amp;day , &amp;year) ;
    GetSystemTime (&amp;hour , &amp;min , &amp;sec) ;
    sprintf (FileName , "%d%d%d%d%d%d.bmp" , year , mon , day , hour , min , sec) ;
   
    MakePathname (PathName , FileName , SaveFilePathName) ;
   
    capGrabFrame(hCapWnd); //從CCD中抓取單格影像，但CCD的Preview和Overlay將停止
    capFileSaveDIB(hCapWnd,SaveFilePathName); //存成bmp檔  
         
    DisplayImageFile (panelHandle , PANEL_PICTURE , SaveFilePathName) ;
         
   break;
  }
return 0;
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