Actually, I don't think width and height even matter here, since you won't see the window.Īfter calling capDriverConnect, you then just need to use capSetVideoFormat to set the format you want. I think I used the desktop's window handle instead of making a child window. Just use:ĬapCreateCaptureWindow ( "Window Title", 0, 0, 0, width, height, ?, 0 ) You don't really need to create it offscreen. I assume I'd have to do something with hwndc = capCreateCaptureWindow ( "My Own Capture Window", WS_CHILD| WS_VISIBLE, 0, 0, 320, 240, hwnd, 1) to make it offscreen, and then convert/blit it to an Allegro bitmap?ĭisclaimer: I'm at work this is mostly from memory. I'm hoping this is something very trivial to someone experienced with the Windows API.
I want to just create a BITMAP structure that displays the current frame of the camera. I'd rather write the program in traditional Allegro fashion (ie, not using WinMain) and use as little Win32 as possible. That code does work and displays the webcam in a window. If (GetTickCount ( ) - dwStart > = 1000 ) Return DefWindowProc (hwnd,imsg,wparam,lparam ) SetWindowPos (hwnd, 0,CW_USEDEFAULT,CW_USEDEFAULT, 40 +capStat.uiImageWidth, 120 +capStat.uiImageHeight,SWP_NOMOVE |SWP_NOZORDER | SWP_NOSENDCHANGING ) SetWindowPos (hwndc, 0, 40, 20, capStat.uiImageWidth,capStat.uiImageHeight,SWP_NOMOVE | SWP_NOZORDER ) WS_CHILD | WS_VISIBLE, 0, 0, 320, 240, hwnd, 1 ) ĬapGetStatus (hwndc, &capStat, sizeof (CAPSTATUS ) ) Hwndc = capCreateCaptureWindow ( "My Own Capture Window", LRESULT CALLBACK WinProc (HWND hwnd,UINT imsg,WPARAM wparam,LPARAM lparam ) If (PeekMessage ( &msg,NULL, 0, 0,PM_REMOVE ) ) Hwnd = CreateWindow ( "wc1", "test" ,WS_OVERLAPPEDWINDOW, 100, 100, 500, 500,NULL,NULL,hinstance,NULL ) Wc.hIconSm = LoadIcon (NULL,IDI_WINLOGO ) Wc.hbrBackground = (HBRUSH )GetStockObject (WHITE_BRUSH ) Wc.hCursor = LoadCursor (NULL,IDC_ARROW ) Int WINAPI WinMain (HINSTANCE hinstance,HINSTANCE hprevinstance,PSTR CmdLine, int Show )
LRESULT CALLBACK WinProc (HWND,UINT,WPARAM,LPARAM )
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