Merge from branch ReactX to Trunk,

Merge from branch ReactX to Trunk,
Please make a clean build after this update

Add dxg.sys driver
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This driver contains all DirectX graphic APIs called by win32k. Most of them
are stubbed, and the following APIs are implemented:
DxDxgGenericThunk, DxDdIoctl, DriverEntry, DxDdStartupDxGraphics, DxDdCleanupDxGraphics

Add dxgthk.sys driver, which is 100% finished
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The following APIs are implemented (almost all are forwarders):
DriverEntry, EngAcquireSemaphore, EngAllocMem, EngAllocUserMem,
EngCopyBits, EngCreateBitmap, EngCreatePalette, EngCreateSemaphore,
EngDeletePalette, EngDeleteSemaphore, EngDeleteSurface,
EngFindImageProcAddress, EngFreeMem, EngFreeUserMem,
EngLoadImage, EngLockSurface, EngReleaseSemaphore,
EngSetLastError, EngUnloadImage, EngUnlockSurface

Add dxapi.sys driver
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Most of the APIs used by the graphic card's driver or win32k are stubs.
The following APIs are implemented:
DriverEntry, GsDriverEntry, DxApiGetVersion, DxApi.
All APIs which DxApi wraps are stubs.

Changes in win32k
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Move _DC struct to include\reactos\win32k\ntgdihdl.h
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Implement NtGdiDdCanCreateD3DBuffer, NtGdiD3dContextDestroy,
NtGdiD3dContextDestroyAll, NtGdiDdCreateD3DBuffer, NtGdiDdDestroyD3DBuffer,
NtGdiD3dDrawPrimitives2, NtGdiDdLockD3D, NtGdiD3dValidateTextureStageState,
NtGdiDdUnlockD3D, NtGdiDdCreateSurface, NtGdiDdWaitForVerticalBlank,
NtGdiDdCanCreateSurface, NtGdiDdGetScanLine, NtGdiDdCreateSurfaceEx,
DxDdStartupDxGraphics, NtGdiDdCreateDirectDrawObject, NtGdiDxgGenericThunk,
NtGdiDdGetDriverState, NtGdiDdColorControl, NtGdiDdCreateSurfaceObject,
NtGdiDdCreateSurfaceObject, NtGdiDdDeleteDirectDrawObject, NtGdiDdDeleteSurfaceObject,
NtGdiDdQueryDirectDrawObject, NtGdiDdReenableDirectDrawObject, NtGdiDdGetDriverInfo,
NtGdiDdGetAvailDriverMemory, NtGdiDdSetExclusiveMode, NtGdiDdFlipToGDISurface,
NtGdiDdGetDC, NtGdiDdGetDxHandle, NtGdiDdReleaseDC, NtGdiDdResetVisrgn,
NtGdiDdSetGammaRamp, NtGdiDdDestroySurface, NtGdiDdFlip, NtGdiDdLock, NtGdiDdUnlock,
NtGdiDdBlt, NtGdiDdSetColorKey, NtGdiDdAddAttachedSurface, NtGdiDdGetBltStatus,
NtGdiDdGetFlipStatus, NtGdiDdUpdateOverlay, NtGdiDdSetOverlayPosition,
NtGdiDdAlphaBlt, NtGdiDdAttachSurface, NtGdiDdUnattachSurface,
NtGdiDvpCanCreateVideoPort, NtGdiDvpColorControl, NtGdiDvpCreateVideoPort,
NtGdiDvpDestroyVideoPort, NtGdiDvpFlipVideoPort, NtGdiDvpGetVideoPortBandwidth,
NtGdiDvpGetVideoPortFlipStatus, NtGdiDvpGetVideoPortInputFormats,
NtGdiDvpGetVideoPortLine, NtGdiDvpGetVideoPortOutputFormats,
NtGdiDvpGetVideoPortConnectInfo, NtGdiDvpGetVideoSignalStatus,
NtGdiDvpUpdateVideoPort, NtGdiDvpWaitForVideoPortSync,
NtGdiDvpAcquireNotification, NtGdiDvpReleaseNotification,
NtGdiDvpGetVideoPortField, NtGdiDdBeginMoCompFrame,
NtGdiDdCreateMoComp, NtGdiDdDestroyMoComp,
NtGdiDdEndMoCompFrame, NtGdiDdGetInternalMoCompInfo,
NtGdiDdGetMoCompBuffInfo, NtGdiDdGetMoCompFormats,
NtGdiDdGetMoCompGuids, NtGdiDdQueryMoCompStatus,
NtGdiDdRenderMoComp, HeapVidMemAllocAligned,
VidMemFree, EngAllocPrivateUserMem, EngFreePrivateUserMem,
EngLockDirectDrawSurface, EngUnlockDirectDrawSurface

But all those functions are stubbed in dxg.sys
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Implemented APIsL

DxEngLockDC, DxEngUnlockDC, DxEngGetDCState, EngDxIoctl
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Stubbed APIs:

DxEngNUIsTermSrv, DxEngRedrawDesktop, DxEngDispUniq, DxEngVisRgnUniq,
DxEngEnumerateHdev, DxEngGetDeviceGammaRamp, DxEngCreateMemoryDC,
DxEngScreenAccessCheck, DxEngLockShareSem, DxEngUnlockShareSem,
DxEngLockHdev, DxEngUnlockHdev, DxEngReferenceHdev,
DxEngIsHdevLockedByCurrentThread, DxEngUnreferenceHdev,
DxEngSetDeviceGammaRamp, DxEngSpTearDownSprites,
DxEngSpUnTearDownSprites, DxEngSpSpritesVisible,
DxEngGetHdevData, DxEngSetHdevData, DxEngGetDesktopDC,
DxEngDeleteDC, DxEngCleanDC, DxEngSetDCOwner,
DxEngSetDCState, DxEngSelectBitmap,DxEngSetBitmapOwner,
DxEngDeleteSurface, DxEngGetSurfaceData, DxEngAltLockSurface,
DxEngUploadPaletteEntryToSurface, DxEngMarkSurfaceAsDirectDraw,
DxEngSelectPaletteToSurface, DxEngSyncPaletteTableWithDevice,
DxEngSetPaletteState, DxEngGetRedirectionBitmap, DxEngLoadImage,
DxEngIncDispUniq

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Remember we need the DxEng APIs implemented and HeapVidMemAllocAligned,
VidMemFree, EngAllocPrivateUserMem, EngFreePrivateUserMem,
EngLockDirectDrawSurface, EngUnlockDirectDrawSurface implemented
before it's possible to have full DirectX support at kmode.

svn path=/trunk/; revision=30328