BOOL DrvAssertMode(DHPDEV dhpdev, BOOL Enable)
{
PPDEV ppdev = (PPDEV) dhpdev;
ULONG returnedDataLength;
DISPDBG((2, "DrvAssertMode\n"));
if (Enable) {
//
// The screen must be reenabled since we had gone to full screen,
// or another pdev.
// Re-initialize the device.
//
pPtrSave = ppdev->pPtrSave;
pPtrWork = ppdev->pPtrWork;
if (!bInitPointer(ppdev))
{
RIP("DrvAssertMode failed bInitPointer\n");
return FALSE;
}
if (!bInitVGA(ppdev, FALSE))
{
RIP("DrvAssertMode failed bInitVGA\n");
return FALSE;
}
vForceBank0(ppdev);
// Restore the off screen data. This protects the Desktop
// from a DOS application that might trash the off screen
// memory.
ppdev->bBitsSaved = FALSE; // clear the DrvSaveScreenBits info flag
// ie. blow away cached screen region
} else {
//
// We must give up the display.
// Call the kernel driver to reset the device to a known state.
//
if (EngDeviceIoControl(ppdev->hDriver,
IOCTL_VIDEO_RESET_DEVICE,
NULL,
0,
NULL,
0,
&returnedDataLength))
{
RIP("Reset Device Failed");
return FALSE;
}
}
return TRUE;
}
DHPDEV DrvEnablePDEV(
DEVMODEW *pDevmode, // Pointer to DEVMODE
PWSTR pwszLogAddress, // Logical address
ULONG cPatterns, // number of patterns
HSURF *ahsurfPatterns, // return standard patterns
ULONG cjGdiInfo, // Length of memory pointed to by pGdiInfo
ULONG *pGdiInfo, // Pointer to GdiInfo structure
ULONG cjDevInfo, // Length of following PDEVINFO structure
DEVINFO *pDevInfo, // physical device information structure
HDEV hdev, // HDEV, used for callbacks
PWSTR pwszDeviceName, // DeviceName - not used
HANDLE hDriver) // Handle to base driver
{
GDIINFO GdiInfo;
DEVINFO DevInfo;
PPDEV ppdev = (PPDEV) NULL;
UNREFERENCED_PARAMETER(pwszLogAddress);
UNREFERENCED_PARAMETER(pwszDeviceName);
// Allocate a physical device structure.
ppdev = (PPDEV) EngAllocMem(0, sizeof(PDEV), ALLOC_TAG);
if (ppdev == (PPDEV) NULL)
{
RIP("DISP DrvEnablePDEV failed EngAllocMem\n");
return((DHPDEV) 0);
}
memset(ppdev, 0, sizeof(PDEV));
// Save the screen handle in the PDEV.
ppdev->hDriver = hDriver;
// Get the current screen mode information. Set up device caps and devinfo.
if (!bInitPDEV(ppdev, pDevmode, &GdiInfo, &DevInfo))
{
DISPDBG((0,"DISP DrvEnablePDEV failed\n"));
goto error_free;
}
// eVb: 1.2 [VGARISC Change] - Disable hardware pointer support
#if 0
// Initialize the cursor information.
if (!bInitPointer(ppdev, &DevInfo))
{
// Not a fatal error...
DISPDBG((0, "DrvEnablePDEV failed bInitPointer\n"));
}
#endif
// eVb: 1.2 [END]
// Initialize palette information.
if (!bInitPaletteInfo(ppdev, &DevInfo))
{
RIP("DrvEnablePDEV failed bInitPalette\n");
goto error_free;
}
// Copy the devinfo into the engine buffer.
memcpy(pDevInfo, &DevInfo, min(sizeof(DEVINFO), cjDevInfo));
// Set the pdevCaps with GdiInfo we have prepared to the list of caps for this
// pdev.
memcpy(pGdiInfo, &GdiInfo, min(cjGdiInfo, sizeof(GDIINFO)));
return((DHPDEV) ppdev);
// Error case for failure.
error_free:
EngFreeMem(ppdev);
return((DHPDEV) 0);
}
HSURF DrvEnableSurface(DHPDEV dhpdev)
{
PPDEV ppdev;
PDEVSURF pdsurf;
DHSURF dhsurf;
HSURF hsurf;
DISPDBG((2, "enabling Surface\n"));
ppdev = (PPDEV) dhpdev;
//
// Initialize the VGA device into the selected mode which will also map
// the video frame buffer
//
if (!bInitVGA(ppdev, TRUE))
{
goto error_done;
}
dhsurf = (DHSURF) EngAllocMem(0, sizeof(DEVSURF), ALLOC_TAG);
if (dhsurf == (DHSURF) 0)
{
goto error_done;
}
pdsurf = (PDEVSURF) dhsurf;
pdsurf->ident = DEVSURF_IDENT;
pdsurf->flSurf = 0;
pdsurf->iFormat = BMF_PHYSDEVICE;
pdsurf->jReserved1 = 0;
pdsurf->jReserved2 = 0;
pdsurf->ppdev = ppdev;
pdsurf->sizlSurf.cx = ppdev->sizlSurf.cx;
pdsurf->sizlSurf.cy = ppdev->sizlSurf.cy;
pdsurf->lNextPlane = 0;
pdsurf->pvScan0 = ppdev->pjScreen;
pdsurf->pvBitmapStart = ppdev->pjScreen;
pdsurf->pvStart = ppdev->pjScreen;
pdsurf->pvConv = &ajConvertBuffer[0];
// Initialize pointer information.
//
// bInitPointer must be called before bInitSavedBits.
//
if (!bInitPointer(ppdev)) {
DISPDBG((0, "DrvEnablePDEV failed bInitPointer\n"));
goto error_clean;
}
if (!SetUpBanking(pdsurf, ppdev)) {
DISPDBG((0, "DrvEnablePDEV failed SetUpBanking\n"));
goto error_clean;
}
if ((hsurf = EngCreateDeviceSurface(dhsurf, ppdev->sizlSurf, BMF_4BPP)) ==
(HSURF) 0)
{
DISPDBG((0, "DrvEnablePDEV failed EngCreateDeviceSurface\n"));
goto error_clean;
}
//
// vInitSavedBits must be called after bInitPointer.
//
vInitSavedBits(ppdev);
if (EngAssociateSurface(hsurf, ppdev->hdevEng,
HOOK_BITBLT | HOOK_TEXTOUT | HOOK_STROKEPATH |
HOOK_COPYBITS | HOOK_PAINT | HOOK_FILLPATH
))
{
ppdev->hsurfEng = hsurf;
ppdev->pdsurf = pdsurf;
// Set up an empty saved screen block list
pdsurf->ssbList = NULL;
DISPDBG((2, "enabled surface\n"));
return(hsurf);
}
DISPDBG((0, "DrvEnablePDEV failed EngDeleteSurface\n"));
EngDeleteSurface(hsurf);
error_clean:
// We created the surface, so delete it
EngFreeMem(dhsurf);
error_done:
return((HSURF) 0);
}
