129 lines
5.8 KiB
C
129 lines
5.8 KiB
C
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/******************************Module*Header*******************************\
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* Module Name: driver.h
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*
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* Contains prototypes for the display driver.
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*
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* Copyright (c) 1992-1995 Microsoft Corporation
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\**************************************************************************/
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typedef struct _PDEV PDEV; // Handy forward declaration
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//////////////////////////////////////////////////////////////////////
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// Miscellaneous shared stuff
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#define DLL_NAME L"modex" // Name of the DLL in UNICODE
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#define STANDARD_DEBUG_PREFIX "ModeX: " // All debug output is prefixed
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// by this string
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#define ALLOC_TAG 'xdmD' // Dmdx
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// Four byte tag (characters in
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// reverse order) used for
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// memory allocations
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#define DRIVER_EXTRA_SIZE 0 // Size of the DriverExtra information in the
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// DEVMODE structure
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#define NUM_FLIP_BUFFERS 5 // Total number of flip buffers that we'll tell
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// DirectDraw we have, including the primary
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// surface buffer
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/////////////////////////////////////////////////////////////////////////
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// Palette stuff
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BOOL bEnablePalette(PDEV*);
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VOID vDisablePalette(PDEV*);
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VOID vAssertModePalette(PDEV*, BOOL);
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BOOL bInitializePalette(PDEV*, DEVINFO*);
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VOID vUninitializePalette(PDEV*);
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#define MAX_CLUT_SIZE (sizeof(VIDEO_CLUT) + (sizeof(ULONG) * 256))
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/////////////////////////////////////////////////////////////////////////
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// DirectDraw stuff
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typedef struct _FLIPRECORD
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{
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FLATPTR fpFlipFrom; // Surface we last flipped from
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LONGLONG liFlipTime; // Time at which last flip
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// occured
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LONGLONG liFlipDuration; // Precise amount of time it
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// takes from vblank to vblank
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BOOL bHaveEverCrossedVBlank; // True if we noticed that we
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// switched from inactive to
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// vblank
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BOOL bWasEverInDisplay; // True if we ever noticed that
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// we were inactive
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BOOL bFlipFlag; // True if we think a flip is
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// still pending
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} FLIPRECORD;
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BOOL bEnableDirectDraw(PDEV*);
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VOID vDisableDirectDraw(PDEV*);
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VOID vAssertModeDirectDraw(PDEV*, BOOL);
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////////////////////////////////////////////////////////////////////////
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// The Physical Device data structure
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typedef struct _PDEV
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{
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ULONG iBitmapFormat; // BMF_8BPP (our current colour depth)
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UCHAR* pjBase; // Mapped IO port base for this PDEV
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LONG lVgaDelta; // VGA screen stride
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BYTE* pjVga; // Points to VGA's base screen address
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ULONG cjVgaOffset; // Offset from pjVga to current flip
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// buffer
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ULONG iVgaPage; // Page number of current flip buffer
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ULONG cVgaPages; // Count of flip buffers
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ULONG cjVgaPageSize; // Size of a flip buffer
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BYTE* pjScreen; // Points to shadow buffer
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LONG lScreenDelta; // Shadow buffer stride
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FLATPTR fpScreenOffset; // Offset to current DirectDraw flip
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// buffer; if zero, primary GDI
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// surface is visible
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LONG cxScreen; // Visible screen width
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LONG cyScreen; // Visible screen height
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LONG cxMemory; // Shadow buffer width
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LONG cyMemory; // Shadow buffer height
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HANDLE hDriver; // Handle to \Device\Screen
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HDEV hdevEng; // Engine's handle to PDEV
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HSURF hsurfScreen; // Engine's handle to screen surface
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HSURF hsurfShadow; // Engine's handle to our shadow buffer
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FLONG flHooks; // What we're hooking from GDI
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ULONG ulMode; // Mode the mini-port driver is in.
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SURFOBJ* pso; // DIB copy of our shaodw surface to
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// which we have GDI draw everything
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LONG cLocks; // Number of current DirectDraw
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// locks
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RECTL rclLock; // Bounding box of all current Direct-
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// Draw locks
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////////// Palette stuff:
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PALETTEENTRY* pPal; // The palette if palette managed
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HPALETTE hpalDefault; // GDI handle to the default palette.
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FLONG flRed; // Red mask for 16/32bpp bitfields
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FLONG flGreen; // Green mask for 16/32bpp bitfields
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FLONG flBlue; // Blue mask for 16/32bpp bitfields
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ULONG cPaletteShift; // number of bits the 8-8-8 palette must
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// be shifted by to fit in the hardware
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/////////// DirectDraw stuff:
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FLIPRECORD flipRecord; // Used to track vertical blank status
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ULONG cDwordsPerPlane; // Total number of dwords per plane
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} PDEV, *PPDEV;
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/////////////////////////////////////////////////////////////////////////
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// Miscellaneous prototypes:
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VOID vUpdate(PDEV*, RECTL*, CLIPOBJ*);
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BOOL bAssertModeHardware(PDEV*, BOOL);
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BOOL bEnableHardware(PDEV*);
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VOID vDisableHardware(PDEV*);
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