//
// Flip the real page with virtual page
// - in bAppFullScreen mode, do page flipping
// - in windowed mode, copy the hidden surface to the visible surface
//
// waitflip : if not 0, wait for page flip to end
BOOL ScreenFlip(int waitflip)
{
HRESULT hr;
RECT rect;
UNREFERENCED_PARAMETER(waitflip);
if (bAppFullScreen)
{
//hr = IDirectDrawSurface_GetFlipStatus (ScreenReal, DDGFS_);
// In full-screen exclusive mode, do a hardware flip.
hr = IDirectDrawSurface_Flip(ScreenReal, NULL, DDFLIP_WAIT); //return immediately
// If the surface was lost, restore it.
if (hr == DDERR_SURFACELOST)
{
IDirectDrawSurface_Restore(ScreenReal);
// The restore worked, so try the flip again.
hr = IDirectDrawSurface_Flip(ScreenReal, 0, DDFLIP_WAIT);
}
}
else
{
rect.left = windowPosX;
rect.top = windowPosY;
rect.right = windowPosX + ScreenWidth - 1;
rect.bottom = windowPosY + ScreenHeight - 1;
// Copy the back buffer to front.
hr = IDirectDrawSurface_Blt(ScreenReal, &rect, ScreenVirtual, 0, DDBLT_WAIT, 0);
if (hr != DD_OK)
{
// If the surfaces were lost, restore them.
if (IDirectDrawSurface_IsLost(ScreenReal) == DDERR_SURFACELOST)
IDirectDrawSurface_Restore(ScreenReal);
if (IDirectDrawSurface_IsLost(ScreenVirtual) == DDERR_SURFACELOST)
IDirectDrawSurface_Restore(ScreenVirtual);
// Retry the copy.
hr = IDirectDrawSurface_Blt(ScreenReal,&rect, ScreenVirtual, 0, DDBLT_WAIT, 0);
}
}
if (hr != DD_OK)
I_Error("ScreenFlip() : couldn't Flip surfaces because %s", DXErrorToString(hr));
return FALSE;
}
//
// Create the DirectDraw object for later
//
BOOL CreateDirectDrawInstance (VOID)
{
HRESULT hr;
IDirectDraw* DDr;
IDirectDraw** rp = &DDr;
IDirectDraw2** rp2 = &DDr2;
LPVOID *tp = (LPVOID *)rp2;
if (!LoadDirectDraw())
return FALSE;
//
// create an instance of DirectDraw object
//
if (FAILED(hr = pfnDirectDrawCreate(NULL, rp, NULL)))
I_Error("DirectDrawCreate FAILED: %s", DXErrorToString(hr));
// change interface to IDirectDraw2
if (FAILED(hr = IDirectDraw_QueryInterface(DDr, &IID_IDirectDraw2, tp)))
I_Error("Failed to query DirectDraw2 interface: %s", DXErrorToString(hr));
// release the interface we don't need
IDirectDraw_Release (DDr);
return TRUE;
}
//
// - returns true if DirectDraw was initialized properly
//
int InitDirectDrawe (HWND appWin, int width, int height, int bpp, int fullScr)
{
DDSURFACEDESC ddsd; // DirectDraw surface description for allocating
DDSCAPS ddscaps;
HRESULT ddrval;
DWORD dwStyle;
RECT rect;
// enumerate directdraw devices
//if (FAILED(DirectDrawEnumerate (myEnumDDDevicesCallback, NULL)))
// I_Error("Error with DirectDrawEnumerate");
if (!DDr2)
CreateDirectDrawInstance();
// remember what screen mode we are in
bAppFullScreen = fullScr;
ScreenHeight = height;
ScreenWidth = width;
if (bAppFullScreen)
{
// Change window attributes
dwStyle = WS_POPUP | WS_VISIBLE;
SetWindowLong (appWin, GWL_STYLE, dwStyle);
SetWindowPos(appWin, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOACTIVATE |
SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER);
// Get exclusive mode
ddrval = IDirectDraw2_SetCooperativeLevel(DDr2, appWin, DDSCL_EXCLUSIVE |
DDSCL_FULLSCREEN |
DDSCL_ALLOWREBOOT);
if (ddrval != DD_OK)
I_Error("SetCooperativeLevel FAILED: %s\n", DXErrorToString(ddrval));
// Switch from windows desktop to fullscreen
#ifdef NT4COMPAT
ddrval = IDirectDraw2_SetDisplayMode(DDr2, width, height, bpp, 0, 0);
#else
ddrval = IDirectDraw2_SetDisplayMode(DDr2, width, height, bpp, 0, DDSDM_STANDARDVGAMODE);
#endif
if (ddrval != DD_OK)
I_Error("SetDisplayMode FAILED: %s\n", DXErrorToString(ddrval));
// This is not really needed, except in certain cases. One case
// is while using MFC. When the desktop is initally at 16bpp, a mode
// switch to 8bpp somehow causes the MFC window to not fully initialize
// and a CreateSurface will fail with DDERR_NOEXCLUSIVEMODE. This will
// ensure that the window is initialized properly after a mode switch.
ShowWindow(appWin, SW_SHOW);
// Create the primary surface with 1 back buffer. Always zero the
// DDSURFACEDESC structure and set the dwSize member!
ZeroMemory(&ddsd, sizeof (ddsd));
ddsd.dwSize = sizeof (ddsd);
ddsd.dwFlags = DDSD_CAPS | DDSD_BACKBUFFERCOUNT;
ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE | DDSCAPS_FLIP | DDSCAPS_COMPLEX;
// for fullscreen we use page flipping, for windowed mode, we blit the hidden surface to
// the visible surface, in both cases we have a visible (or 'real') surface, and a hidden
// (or 'virtual', or 'backbuffer') surface.
ddsd.dwBackBufferCount = 2;
ddrval = IDirectDraw2_CreateSurface(DDr2,&ddsd, &ScreenReal, NULL);
if (ddrval != DD_OK)
I_Error("CreateSurface Primary Screen FAILED");
// Get a pointer to the back buffer
ddscaps.dwCaps = DDSCAPS_BACKBUFFER;
ddrval = IDirectDrawSurface_GetAttachedSurface(ScreenReal,&ddscaps, &ScreenVirtual);
if (ddrval != DD_OK)
I_Error("GetAttachedSurface FAILED");
}
else
{
rect.top = 0;
rect.left = 0;
rect.bottom = height;
rect.right = width;
// Change window attributes
dwStyle = GetWindowStyle(appWin);
dwStyle &= ~WS_POPUP;
dwStyle |= WS_OVERLAPPED | WS_SYSMENU | WS_CAPTION;
SetWindowLong(appWin, GWL_STYLE, dwStyle);
// Resize the window so that the client area is the requested width/height
AdjustWindowRectEx(&rect, GetWindowStyle(appWin), GetMenu(appWin) != NULL,
GetWindowExStyle(appWin));
// Just in case the window was moved off the visible area of the
// screen.
SetWindowPos(appWin, NULL, 0, 0, rect.right-rect.left,
rect.bottom-rect.top, SWP_NOMOVE | SWP_NOZORDER |
SWP_NOACTIVATE);
SetWindowPos(appWin, HWND_NOTOPMOST, 0, 0, 0, 0,
SWP_NOSIZE | SWP_NOMOVE | SWP_NOACTIVATE);
// Exclusive mode is normal since it's in windowed mode and needs
// to cooperate with GDI
ddrval = IDirectDraw2_SetCooperativeLevel(DDr2,appWin, DDSCL_NORMAL);
if (ddrval != DD_OK)
I_Error("SetCooperativeLevel FAILED");
// Always zero the DDSURFACEDESC structure and set the dwSize member!
ZeroMemory(&ddsd, sizeof (ddsd));
ddsd.dwSize = sizeof (ddsd);
ddsd.dwFlags = DDSD_CAPS;
ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;
// Create the primary surface
ddrval = IDirectDraw2_CreateSurface(DDr2,&ddsd, &ScreenReal, NULL);
if (ddrval != DD_OK)
I_Error("CreateSurface Primary Screen FAILED");
// Create a back buffer for offscreen rendering, this will be used to
// blt to the primary
ScreenVirtual = CreateNewSurface(width, height, DDSCAPS_OFFSCREENPLAIN |
DDSCAPS_SYSTEMMEMORY);
if (ScreenVirtual == NULL)
I_Error("CreateSurface Secondary Screen FAILED");
/// \todo get the desktop bit depth, and build a lookup table
/// for quick conversions of 8bit color indexes 0-255 to desktop colors
/// eg: 256 entries of equivalent of palette colors 0-255 in 15,16,24,32 bit format
/// when blit virtual to real, convert pixels through lookup table..
// Use a clipper object for clipping when in windowed mode
// (make sure our drawing doesn't affect other windows)
ddrval = IDirectDraw2_CreateClipper (DDr2, 0, &windclip, 0);
if (ddrval != DD_OK)
I_Error("CreateClipper FAILED");
// Associate the clipper with the window.
ddrval = IDirectDrawClipper_SetHWnd (windclip,0, appWin);
if (ddrval != DD_OK)
I_Error("Clipper -> SetHWnd FAILED");
// Attach the clipper to the surface.
ddrval = IDirectDrawSurface_SetClipper (ScreenReal,windclip);
if (ddrval != DD_OK)
I_Error("PrimaryScreen -> SetClipperClipper FAILED");
}
return TRUE;
}
