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- //------------------------------------------------------------------------------
- // File: DDrawObj.cpp
- //
- // Desc: DirectShow sample code - implementation of DDrawObject class.
- //
- // Copyright (c) 1993-2001 Microsoft Corporation. All rights reserved.
- //------------------------------------------------------------------------------
-
-
- #include <streams.h>
- #include <windows.h>
-
- #include "DDrawObj.h"
- #include "VidPlay.h"
-
-
- //
- // CDDrawObject constructor
- //
- CDDrawObject::CDDrawObject(HWND hWndApp)
- {
- DbgLog((LOG_TRACE, 3, TEXT("CDDrawObject c-tor entered"))) ;
-
- m_pDDObject = NULL ;
- m_pPrimary = NULL ;
- m_pBackBuff = NULL ;
-
- // Default colors to be used for filling
- m_dwScrnColor = RGB(0, 0, 0) ;
- m_dwVideoKeyColor = RGB(255, 0, 255) ;
-
- // Rects for the screen area and video area
- SetRect(&m_RectScrn, 0, 0, 0, 0) ;
- SetRect(&m_RectVideo, 0, 0, 0, 0) ;
-
- // some flags, count, messages for buffer flipping
- m_bInExclMode = FALSE ;
- m_iCount = 0 ;
- m_bFrontBuff = TRUE ;
- m_szFrontMsg = TEXT("Front Buffer" );
- m_szBackMsg = TEXT("Back Buffer" );
- m_szDirection = TEXT("Press the 'Arrow' keys to move the ball. Hit 'Esc' to stop playback." );
-
- // Create brush and pen for drawing the filled ball
- LOGBRUSH lb ;
- lb.lbStyle = BS_HATCHED ;
- lb.lbColor = RGB(0, 255, 0) ;
- lb.lbHatch = HS_CROSS ;
- m_hBrush = CreateBrushIndirect(&lb) ;
- ASSERT(NULL != m_hBrush) ;
-
- m_hPen = CreatePen(PS_SOLID, 2, RGB(0, 0, 255)) ;
- ASSERT(NULL != m_hPen) ;
-
- HRESULT hr=S_OK ;
- m_pOverlayCallback = (IDDrawExclModeVideoCallback *) new COverlayCallback(this, hWndApp, &hr) ;
- ASSERT(SUCCEEDED(hr)) ;
- m_bOverlayVisible = FALSE ; // don't draw color key until it's OK-ed by OverlayMixer
- }
-
-
- //
- // CDDrawObject destructor
- //
- CDDrawObject::~CDDrawObject(void)
- {
- DbgLog((LOG_TRACE, 3, TEXT("CDDrawObject d-tor entered"))) ;
-
- // Let go of the overlay notification callback object now
- if (m_pOverlayCallback)
- m_pOverlayCallback->Release() ; // done with callback object now
-
- // delete the pen and brush we created for drawing the ball
- if (m_hPen)
- DeleteObject(m_hPen) ;
- if (m_hBrush)
- DeleteObject(m_hBrush) ;
-
- if (m_pBackBuff)
- m_pBackBuff->Release() ;
- if (m_pPrimary)
- m_pPrimary->Release() ;
-
- if (m_pDDObject)
- m_pDDObject->Release() ;
-
- DbgLog((LOG_TRACE, 3, TEXT("CDDrawObject d-tor exiting..."))) ;
- }
-
-
- //
- // CDDrawObject::Initialize(): Just creates a DDraw object.
- //
- BOOL CDDrawObject::Initialize(HWND hWndApp)
- {
- DbgLog((LOG_TRACE, 5, TEXT("CDDrawObject::Initialize() entered"))) ;
-
- HRESULT hr = DirectDrawCreate(NULL, &m_pDDObject, NULL) ;
- if (FAILED(hr) || NULL == m_pDDObject)
- {
- MessageBox(hWndApp,
- TEXT("Can't create a DirectDraw object.\nPress OK to end the app."),
- TEXT("Error"), MB_OK | MB_ICONSTOP) ;
- return FALSE ;
- }
-
- return TRUE;
- }
-
-
- #define SCRN_WIDTH 800
- #define SCRN_HEIGHT 600
- #define SCRN_BITDEPTH 8
-
- //
- // CDDrawObject::StartExclusiveMode(): Gets into fullscreen exclusive mode, sets
- // display mode to 800x600x8, creates a flipping primary surface with one back
- // buffer, gets the surface size and inits some variables.
- //
- // NOTE: Please don't bother about the "#ifndef NOFLIP"s. They were there
- // for testing.
- //
- HRESULT CDDrawObject::StartExclusiveMode(HWND hWndApp)
- {
- DbgLog((LOG_TRACE, 5, TEXT("CDDrawObject::StartExclusiveMode() entered"))) ;
-
- HRESULT hr ;
- DDSURFACEDESC ddsd ;
- DDSCAPS ddscaps ;
-
- if (! Initialize(hWndApp) )
- return E_FAIL ;
-
- // Get into fullscreen exclusive mode
- #ifndef NOFLIP
- hr = m_pDDObject->SetCooperativeLevel(hWndApp,
- DDSCL_EXCLUSIVE | DDSCL_FULLSCREEN | DDSCL_ALLOWREBOOT) ;
- if (FAILED(hr))
- {
- MessageBox(hWndApp,
- TEXT("SetCooperativeLevel() failed to go into exclusive mode"),
- TEXT("Error"), MB_OK | MB_ICONSTOP) ;
- return hr ;
- }
- #else
- hr = m_pDDObject->SetCooperativeLevel(hWndApp, DDSCL_NORMAL) ;
- if (FAILED(hr))
- {
- MessageBox(hWndApp,
- TEXT("SetCooperativeLevel() failed to go into normal mode"),
- TEXT("Error"), MB_OK | MB_ICONSTOP) ;
- return hr ;
- }
- #endif // NOFLIP
-
- #ifndef NOFLIP
- hr = m_pDDObject->SetDisplayMode(SCRN_WIDTH, SCRN_HEIGHT, SCRN_BITDEPTH) ;
- if (FAILED(hr))
- {
- DbgLog((LOG_ERROR, 0, TEXT("ERROR: SetDisplayMode failed (Error 0x%lx)"), hr)) ;
- MessageBox(hWndApp, TEXT("SetDisplayMode(640, 480, 8) failed"),
- TEXT("Error"), MB_OK | MB_ICONSTOP) ;
- return hr ;
- }
- #endif // NOFLIP
-
- // Create the primary surface with 1 back buffer
- ZeroMemory(&ddsd, sizeof(ddsd)) ;
- ddsd.dwSize = sizeof(ddsd) ;
-
- #ifndef NOFLIP
- ddsd.dwFlags = DDSD_CAPS | DDSD_BACKBUFFERCOUNT ;
- ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE |
- DDSCAPS_FLIP |
- DDSCAPS_COMPLEX ;
- ddsd.dwBackBufferCount = 1 ;
- #else
- ddsd.dwFlags = DDSD_CAPS ;
- ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE ;
- #endif // NOFLIP
-
- hr = m_pDDObject->CreateSurface(&ddsd, &m_pPrimary, NULL) ;
- if (FAILED(hr))
- {
- #ifndef NOFLIP
- MessageBox(hWndApp, TEXT("CreateSurface(Primary, flip(1), complex) failed"),
- TEXT("Error"), MB_OK | MB_ICONSTOP) ;
- #else
- MessageBox(hWndApp, TEXT("CreateSurface(Primary, noflip, no backbuffer) failed"),
- TEXT("Error"), MB_OK | MB_ICONSTOP) ;
- #endif // NOFLIP
- return hr ;
- }
-
- #ifndef NOFLIP
- // Get a pointer to the back buffer
- ddscaps.dwCaps = DDSCAPS_BACKBUFFER ;
- hr = m_pPrimary->GetAttachedSurface(&ddscaps, &m_pBackBuff) ;
- if (FAILED(hr))
- {
- MessageBox(hWndApp, TEXT("GetAttachedSurface() failed to get back buffer"),
- TEXT("Error"), MB_OK | MB_ICONSTOP) ;
- return hr ;
- }
- #endif // NOFLIP
-
- // Get the screen size and save it as a rect
- ZeroMemory(&ddsd, sizeof(ddsd)) ;
- ddsd.dwSize = sizeof(ddsd) ;
- hr = m_pPrimary->GetSurfaceDesc(&ddsd) ;
- if (! (SUCCEEDED(hr) && (ddsd.dwFlags & DDSD_WIDTH) && (ddsd.dwFlags & DDSD_HEIGHT)) )
- {
- MessageBox(hWndApp, TEXT("GetSurfaceDesc() failed to get surface width & height"),
- TEXT("Error"), MB_OK | MB_ICONSTOP) ;
- return hr ;
- }
-
- SetRect(&m_RectScrn, 0, 0, ddsd.dwWidth, ddsd.dwHeight) ;
-
- // Reset some buffer drawing flags, values etc.
- m_iCount = 0 ;
- m_bFrontBuff = TRUE ;
- m_bInExclMode = TRUE ;
-
- return S_OK ;
- }
-
-
- //
- // CDDrawObject::StopExclusiveMode(): Releases primary buffer, exits
- // exclusive mode, resets some variables/flags.
- //
- HRESULT CDDrawObject::StopExclusiveMode(HWND hWndApp)
- {
- DbgLog((LOG_TRACE, 5, TEXT("CDDrawObject::StopExclusiveMode() entered"))) ;
-
- HRESULT hr ;
-
- if (m_pBackBuff)
- {
- hr = m_pBackBuff->Release() ; // release back buffer
- m_pBackBuff = NULL ; // no back buffer anymore
- }
-
- #ifndef NOFLIP
- if (m_pDDObject)
- {
- // Restore display to previous mode (set with SetDisplayMode())
- hr = m_pDDObject->RestoreDisplayMode();
- if (FAILED(hr))
- {
- DbgLog((LOG_ERROR, 0, TEXT("ERROR: RestoreDisplayMode failed (Error 0x%lx)"), hr)) ;
- MessageBox(hWndApp, TEXT("RestoreDisplayMode failed"),
- TEXT("Error"), MB_OK | MB_ICONSTOP) ;
- }
- }
- #endif // NOFLIP
-
- // Release the primary surface (and attached buffer with it)
- if (m_pPrimary)
- {
- hr = m_pPrimary->Release() ; // release primary surface
- m_pPrimary = NULL ;
- }
-
- // Get out of fullscreen exclusive mode
- if (m_pDDObject)
- {
- hr = m_pDDObject->SetCooperativeLevel(hWndApp, DDSCL_NORMAL) ;
- if (FAILED(hr))
- {
- MessageBox(hWndApp,
- TEXT("SetCooperativeLevel() failed to go back to normal mode"),
- TEXT("Error"), MB_OK | MB_ICONSTOP) ;
- return hr ;
- }
-
- m_pDDObject->Release() ; // now release the DDraw object
- m_pDDObject = NULL ; // no more DDraw object
- }
-
- // Reset the color key and screen, video rects.
- m_dwVideoKeyColor = RGB(255, 0, 255) ;
- SetRect(&m_RectScrn, 0, 0, 0, 0) ;
- SetRect(&m_RectVideo, 0, 0, 0, 0) ;
-
- m_bInExclMode = FALSE ;
-
- return S_OK ;
- }
-
-
- //
- // CDDrawObject::DrawOnSurface(): Private method to draw stuff on back buffer
- //
- void CDDrawObject::DrawOnSurface(LPDIRECTDRAWSURFACE pSurface)
- {
- DbgLog((LOG_TRACE, 5, TEXT("CDDrawObject::DrawOnSurface() entered"))) ;
-
- HDC hDC ;
- TCHAR achBuffer[30] ;
-
- if (DD_OK == pSurface->GetDC(&hDC))
- {
- // write fonr/back to show buffer flipping
- SetBkColor(hDC, RGB(0, 0, 255)) ;
- SetTextColor(hDC, RGB(255, 255, 0)) ;
- wsprintf(achBuffer, TEXT(" %-12s: %6.6d "),
- m_bFrontBuff ? m_szFrontMsg : m_szBackMsg, m_iCount) ;
- TextOut(hDC, 20, 10, achBuffer, lstrlen(achBuffer)) ;
-
- // Write the instructions
- SetBkColor(hDC, RGB(0, 0, 0)) ;
- SetTextColor(hDC, RGB(0, 255, 255)) ;
- TextOut(hDC, m_RectScrn.left + 100, m_RectScrn.bottom - 20, m_szDirection, lstrlen(m_szDirection)) ;
-
- // Draw the ball on screen now
- HBRUSH hBrush = (HBRUSH) SelectObject(hDC, m_hBrush) ; // select special brush
- HPEN hPen = (HPEN) SelectObject(hDC, m_hPen) ; // select special pen
- Ellipse(hDC, m_iBallCenterX - BALL_RADIUS, m_iBallCenterY - BALL_RADIUS,
- m_iBallCenterX + BALL_RADIUS, m_iBallCenterY + BALL_RADIUS) ;
- SelectObject(hDC, hBrush) ; // restore original brush
- SelectObject(hDC, hPen) ; // restore original pen
-
- pSurface->ReleaseDC(hDC) ; // done now; let go of the DC
- }
- }
-
-
- //
- // CDDrawObject::ConvertColorRefToPhysColor(): Converts a COLORREF to a
- // DWORD physical color value based on current display mode.
- //
- // NOTE: This method is useful ONLY if you want to get the COLORREF from
- // OverlayMixer (rather than the physical color as a DWORD) and convert
- // it yourself. But OverlayMixer does it for you anyway; so the utility
- // of this method is quite minimal.
- //
- HRESULT CDDrawObject::ConvertColorRefToPhysColor(COLORREF rgb, DWORD *pdwPhysColor)
- {
- HRESULT hr ;
- COLORREF rgbCurr ;
- HDC hDC ;
- DDSURFACEDESC ddsd ;
-
- ASSERT(rgb != CLR_INVALID) ;
-
- // use GDI SetPixel to color match for us
- hr = m_pBackBuff->GetDC(&hDC) ;
- if (DD_OK != hr)
- {
- DbgLog((LOG_ERROR, 0, TEXT("m_pBackBuff->GetDC() failed (Error 0x%lx)"), hr)) ;
- return hr ;
- }
- rgbCurr = GetPixel(hDC, 0, 0) ; // save current pixel value
- SetPixel(hDC, 0, 0, rgb) ; // set our value
- m_pBackBuff->ReleaseDC(hDC) ;
-
- // now lock the surface so we can read back the converted color
- ZeroMemory(&ddsd, sizeof(ddsd)) ;
- ddsd.dwSize = sizeof(ddsd) ;
- while (DDERR_WASSTILLDRAWING == (hr = m_pBackBuff->Lock(NULL, &ddsd, 0, NULL))) // until unlocked...
- ; // ...just wait
-
- if (DD_OK == hr)
- {
- // get DWORD
- *pdwPhysColor = *(DWORD *) ddsd.lpSurface ;
-
- // mask it to bpp
- if (ddsd.ddpfPixelFormat.dwRGBBitCount < 32)
- *pdwPhysColor &= (1 << ddsd.ddpfPixelFormat.dwRGBBitCount) - 1 ;
- m_pBackBuff->Unlock(NULL) ;
- }
- else
- {
- DbgLog((LOG_ERROR, 0, TEXT("m_pBackBuff->Lock() failed (Error 0x%lx)"), hr)) ;
- return hr ;
- }
-
- // now restote the pixel to the color that was there
- hr = m_pBackBuff->GetDC(&hDC) ;
- if (DD_OK != hr)
- {
- DbgLog((LOG_ERROR, 0, TEXT("m_pBackBuff->GetDC() failed (Error 0x%lx)"), hr)) ;
- return hr ;
- }
- SetPixel(hDC, 0, 0, rgbCurr) ;
- m_pBackBuff->ReleaseDC(hDC) ;
-
- return S_OK ;
- }
-
-
- #if 0
- //
- // CDDrawObject::SetColorKey(): Creates a DWORD physical color out COLORREF.
- //
- // NOTE: This method is useful only if you want to do the conversion. We have
- // defined an inline version in ddrawobj.h file.
- //
- HRESULT CDDrawObject::SetColorKey(COLORKEY *pColorKey)
- {
- if (NULL == pColorKey)
- return E_INVALIDARG ;
-
- DWORD dwPhysColor ;
- HRESULT hr = ConvertColorRefToPhysColor(pColorKey->LowColorValue, &dwPhysColor) ;
- if (FAILED(hr))
- return hr ;
-
- m_dwVideoKeyColor = dwPhysColor ;
- return S_OK ;
- }
- #endif // #if 0
-
-
- //
- // CDDrawObject::FillSurface(): Private method to fill the back buffer with black
- // color and put the color key in teh video area.
- //
- // NOTE: Re-filling the back buffer every time is required ONLY IF the video
- // position keeps changing. Otherwise setting it once should be fine.
- //
- HRESULT CDDrawObject::FillSurface(IDirectDrawSurface *pDDSurface)
- {
- DbgLog((LOG_TRACE, 5, TEXT("CDDrawObject::FillSurface() entered"))) ;
-
- if (NULL == pDDSurface)
- return E_INVALIDARG ;
-
- // Repaint the whole specified surface
- HRESULT hr ;
- DDBLTFX ddFX ;
- ZeroMemory(&ddFX, sizeof(ddFX)) ;
- ddFX.dwSize = sizeof(ddFX) ;
- ddFX.dwFillColor = m_dwScrnColor ;
-
- hr = pDDSurface->Blt(&m_RectScrn, NULL, NULL, DDBLT_COLORFILL | DDBLT_WAIT, &ddFX) ;
- if (FAILED(hr))
- {
- DbgLog((LOG_ERROR, 0, TEXT("pDDSurface->Blt for screen failed (Error 0x%lx)"), hr)) ;
- DbgLog((LOG_ERROR, 0, TEXT("Destination Rect: (%ld, %ld, %ld, %ld), Color = 0x%lx"),
- m_RectScrn.left, m_RectScrn.top, m_RectScrn.right, m_RectScrn.bottom, m_dwScrnColor)) ;
- return hr ;
- }
-
- // Draw color key on the video area of given surface, ONLY IF we are supposed
- // to paint color key in the video area.
- if (m_bOverlayVisible)
- {
- ddFX.dwFillColor = m_dwVideoKeyColor ;
- hr = pDDSurface->Blt(&m_RectVideo, NULL, NULL, DDBLT_COLORFILL | DDBLT_WAIT, &ddFX) ;
- if (FAILED(hr))
- {
- DbgLog((LOG_ERROR, 0, TEXT("pDDSurface->Blt for video failed (Error 0x%lx)"), hr)) ;
- DbgLog((LOG_ERROR, 0, TEXT("Destination Rect: (%ld, %ld, %ld, %ld), Color = 0x%lx"),
- m_RectVideo.left, m_RectVideo.top, m_RectVideo.right, m_RectVideo.bottom,
- m_dwVideoKeyColor)) ;
- return hr ;
- }
- }
- else
- DbgLog((LOG_TRACE, 5, TEXT("Color keying of video area skipped"))) ;
-
- return S_OK ;
- }
-
-
- //
- // CDDrawObject::UpdateAndFlipSurfaces(): Prepares the back buffer and flips.
- //
- HRESULT CDDrawObject::UpdateAndFlipSurfaces(void)
- {
- DbgLog((LOG_TRACE, 5, TEXT("CDDrawObject::UpdateAndFlipSurfaces() entered"))) ;
-
- // Draw screen and color key on the current back buffer
- HRESULT hr = FillSurface(m_pBackBuff) ;
- if (FAILED(hr))
- {
- DbgLog((LOG_ERROR, 1, TEXT("UpdateAndFlipSurfaces() skipped as FillSurface() failed"), hr)) ;
- return hr ; // or return S_OK??
- }
-
- IncCount() ; // increment flip count first
- m_bFrontBuff = !m_bFrontBuff ; // toggle flag
- DrawOnSurface(m_pBackBuff) ; // draw next text on the back buffer
-
- // Keep trying to flip the buffers until successful
- while (1)
- {
- hr = m_pPrimary->Flip(NULL, 0) ; // flip the surfaces
- if (DD_OK == hr) // success!!
- {
- break ;
- }
- if (DDERR_SURFACELOST == hr) // surface lost; try to restore
- {
- DbgLog((LOG_TRACE, 5, TEXT("DirectDraw surface was lost. Trying to restore..."))) ;
- hr = m_pPrimary->Restore() ;
- if (DD_OK != hr) // couldn't restore surface
- {
- DbgLog((LOG_ERROR, 0, TEXT("IDirectDrawSurface::Restore() failed (Error 0x%lx)"), hr)) ;
- break ;
- }
- }
- if (DDERR_WASSTILLDRAWING != hr) // some weird error -- bail out
- {
- DbgLog((LOG_ERROR, 0, TEXT("IDirectDrawSurface::Flip() failed (Error 0x%lx)"), hr)) ;
- break ;
- }
- }
-
- return hr ;
- }
-
-
- //
- // CDDrawObject::SetVideoPosition(): Receives the video position in terms of screen
- // coordinates.
- //
- void CDDrawObject::SetVideoPosition(DWORD dwVideoLeft, DWORD dwVideoTop,
- DWORD dwVideoWidth, DWORD dwVideoHeight)
- {
- DbgLog((LOG_TRACE, 5, TEXT("CDDrawObject::SetVideoPosition() entered"))) ;
-
- SetRect(&m_RectVideo, dwVideoLeft, dwVideoTop, dwVideoLeft + dwVideoWidth,
- dwVideoTop + dwVideoHeight) ;
- }
-
-
- //
- // CDDrawObject::SetBallPosition(): Uses the video position to initialize the ball's
- // position to the center of the video.
- //
- void CDDrawObject::SetBallPosition(DWORD dwVideoLeft, DWORD dwVideoTop,
- DWORD dwVideoWidth, DWORD dwVideoHeight)
- {
- DbgLog((LOG_TRACE, 5, TEXT("CDDrawObject::SetBallPosition() entered"))) ;
-
- // Place the ball at the middle of video on start
- m_iBallCenterX = dwVideoLeft + dwVideoWidth / 2 ;
- m_iBallCenterY = dwVideoTop + dwVideoHeight / 2 ;
- }
-
-
- //
- // CDDrawObject::MoveBallPosition(): Moves the ball L/R/U/D and keeps it within
- // the video area..
- //
- void CDDrawObject::MoveBallPosition(int iDirX, int iDirY)
- {
- DbgLog((LOG_TRACE, 5, TEXT("CDDrawObject::MoveBallPosition(%d, %d) entered"),
- iDirX, iDirY)) ;
-
- m_iBallCenterX += iDirX ;
- m_iBallCenterY += iDirY ;
-
- // Keep the ball inside the video rect
- if (m_iBallCenterX < m_RectVideo.left + BALL_RADIUS)
- m_iBallCenterX = m_RectVideo.left + BALL_RADIUS ;
- else if (m_iBallCenterX > m_RectVideo.right - BALL_RADIUS)
- m_iBallCenterX = m_RectVideo.right - BALL_RADIUS ;
-
- if (m_iBallCenterY < m_RectVideo.top + BALL_RADIUS)
- m_iBallCenterY = m_RectVideo.top + BALL_RADIUS ;
- else if (m_iBallCenterY > m_RectVideo.bottom - BALL_RADIUS)
- m_iBallCenterY = m_RectVideo.bottom - BALL_RADIUS ;
- }
-
-
-
- //
- // Overlay Callback object implementation
- //
- COverlayCallback::COverlayCallback(CDDrawObject *pDDrawObj, HWND hWndApp, HRESULT *phr) :
- CUnknown("Overlay Callback Object", NULL, phr),
- m_pDDrawObj(pDDrawObj),
- m_hWndApp(hWndApp)
- {
- DbgLog((LOG_TRACE, 5, TEXT("COverlayCallback::COverlayCallback() entered"))) ;
- ASSERT(m_pDDrawObj) ;
- AddRef() ; // increment ref count for itself
- }
-
-
- COverlayCallback::~COverlayCallback()
- {
- DbgLog((LOG_TRACE, 5, TEXT("COverlayCallback::~COverlayCallback() entered"))) ;
- }
-
-
- HRESULT COverlayCallback::OnUpdateOverlay(BOOL bBefore,
- DWORD dwFlags,
- BOOL bOldVisible,
- const RECT *prcSrcOld,
- const RECT *prcDestOld,
- BOOL bNewVisible,
- const RECT *prcSrcNew,
- const RECT *prcDestNew)
- {
- DbgLog((LOG_TRACE, 5, TEXT("COverlayCallback::OnUpdateOverlay(%s, ...) entered"),
- bBefore ? "TRUE" : "FALSE")) ;
-
- if (NULL == m_pDDrawObj)
- {
- DbgLog((LOG_ERROR, 1, TEXT("ERROR: NULL DDraw object pointer was specified"))) ;
- return E_POINTER ;
- }
-
- if (bBefore) // overlay is going to be updated
- {
- DbgLog((LOG_TRACE, 5, TEXT("Just turn off color keying and return"))) ;
- m_pDDrawObj->SetOverlayState(FALSE) ; // don't paint color key in video's position
- #ifndef NOFLIP
- m_pDDrawObj->UpdateAndFlipSurfaces() ; // flip the surface so that video doesn't show anymore
- #endif // NOFLIP
- return S_OK ;
- }
-
- //
- // After overlay has been updated. Turn on/off overlay color keying based on
- // flags and use new source/dest position etc.
- //
- if (dwFlags & (AM_OVERLAY_NOTIFY_VISIBLE_CHANGE |
- AM_OVERLAY_NOTIFY_SOURCE_CHANGE |
- AM_OVERLAY_NOTIFY_DEST_CHANGE)) // it's a valid flag
- m_pDDrawObj->SetOverlayState(bNewVisible) ; // paint/don't paint color key based on param
-
- if (dwFlags & AM_OVERLAY_NOTIFY_VISIBLE_CHANGE) // overlay visibility state change
- {
- DbgLog((LOG_TRACE, 5, TEXT(".._NOTIFY_VISIBLE_CHANGE from %s to %s"),
- bOldVisible ? "TRUE" : "FALSE", bNewVisible ? "TRUE" : "FALSE")) ;
- }
-
- if (dwFlags & AM_OVERLAY_NOTIFY_SOURCE_CHANGE) // overlay source rect change
- {
- DbgLog((LOG_TRACE, 5, TEXT(".._NOTIFY_SOURCE_CHANGE from (%ld, %ld, %ld, %ld) to (%ld, %ld, %ld, %ld)"),
- prcSrcOld->left, prcSrcOld->top, prcSrcOld->right, prcSrcOld->bottom,
- prcSrcNew->left, prcSrcNew->top, prcSrcNew->right, prcSrcNew->bottom)) ;
- }
-
- if (dwFlags & AM_OVERLAY_NOTIFY_DEST_CHANGE) // overlay destination rect change
- {
- DbgLog((LOG_TRACE, 5, TEXT(".._NOTIFY_DEST_CHANGE from (%ld, %ld, %ld, %ld) to (%ld, %ld, %ld, %ld)"),
- prcDestOld->left, prcDestOld->top, prcDestOld->right, prcDestOld->bottom,
- prcDestNew->left, prcDestNew->top, prcDestNew->right, prcDestNew->bottom)) ;
- m_pDDrawObj->SetVideoPosition(prcDestNew->left, prcDestNew->top,
- RECTWIDTH(*prcDestNew), RECTHEIGHT(*prcDestNew)) ;
- }
-
- return S_OK ;
- }
-
-
- HRESULT COverlayCallback::OnUpdateColorKey(COLORKEY const *pKey,
- DWORD dwColor)
- {
- DbgLog((LOG_TRACE, 5, TEXT("COverlayCallback::OnUpdateColorKey(.., 0x%lx) entered"), dwColor)) ;
-
- return S_OK ;
- }
-
-
- HRESULT COverlayCallback::OnUpdateSize(DWORD dwWidth, DWORD dwHeight,
- DWORD dwARWidth, DWORD dwARHeight)
- {
- DbgLog((LOG_TRACE, 5, TEXT("COverlayCallback::OnUpdateSize(%lu, %lu, %lu, %lu) entered"),
- dwWidth, dwHeight, dwARWidth, dwARHeight)) ;
-
- PostMessage(m_hWndApp, WM_SIZE_CHANGE, 0, 0) ;
-
- return S_OK ;
- }
-