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/******************************Module*Header*******************************\
* Module Name: driver.h** Contains prototypes for the display driver.** Copyright (c) 1992-1996 Microsoft Corporation* Copyright (c) 1993-1996 Matrox Electronic Systems, Ltd.\**************************************************************************/
//////////////////////////////////////////////////////////////////////
// Put all the conditional-compile constants here. There had better
// not be many!
// Multi-board support can be enabled by setting this to 1:
#define MULTI_BOARDS 0
// This is the maximum number of boards we'll support in a single
// virtual driver:
#if MULTI_BOARDS
#define MAX_BOARDS 7
#define IBOARD(ppdev) ((ppdev)->iBoard)
#else
#define MAX_BOARDS 1
#define IBOARD(ppdev) 0
#endif
//////////////////////////////////////////////////////////////////////
// Miscellaneous shared stuff
#define DLL_NAME L"MGA" // Name of the DLL in UNICODE
#define STANDARD_DEBUG_PREFIX "Mga: " // All debug output is prefixed
// by this string
#define ALLOC_TAG 'agmD' // Dmga
// Four byte tag (characters in
// reverse order) used for memory
// allocations
#define CLIP_LIMIT 50 // We'll be taking 800 bytes of stack space
#define DRIVER_EXTRA_SIZE 0 // 16 // Size of the DriverExtra information
// in the DEVMODE structure
#define TMP_BUFFER_SIZE 8192 // Size in bytes of 'pvTmpBuffer'. Has to
// be at least enough to store an entire
// scan line (i.e., 6400 for 1600x1200x32).
typedef struct _CLIPENUM { LONG c; RECTL arcl[CLIP_LIMIT]; // Space for enumerating complex clipping
} CLIPENUM; /* ce, pce */
typedef struct _PDEV PDEV; // Handy forward declaration
VOID vSetClipping(PDEV*, RECTL*);VOID vResetClipping(PDEV*);VOID vPutBits(PDEV*, SURFOBJ*, RECTL*, POINTL*);VOID vGetBits(PDEV*, SURFOBJ*, RECTL*, POINTL*);VOID vMgaGetBits8bpp(PDEV*, SURFOBJ*, RECTL*, POINTL*);VOID vMgaGetBits16bpp(PDEV*, SURFOBJ*, RECTL*, POINTL*);VOID vMgaGetBits24bpp(PDEV*, SURFOBJ*, RECTL*, POINTL*);
////////////////////////////////////////////////////////////////////////
// Status flags
typedef enum { STAT_GLYPH_CACHE = 0x0001, // Glyph cache successfully allocated
STAT_BRUSH_CACHE = 0x0002, // Brush cache successfully allocated
STAT_DIRECTDRAW = 0x0004, // DirectDraw is enabled
} STATUSFLAGS;
//////////////////////////////////////////////////////////////////////
// Text stuff
#define GLYPH_CACHE_HEIGHT 47 // Number of scans to allocate for glyph cache,
// divided by pel size
#define GLYPH_CACHE_CX 64 // Maximal width of glyphs that we'll consider
// caching
#define GLYPH_CACHE_CY 64 // Maximum height of glyphs that we'll consider
// caching
#define MAX_GLYPH_SIZE ((GLYPH_CACHE_CX * GLYPH_CACHE_CY + 31) / 8)
// Maximum amount of off-screen memory required
// to cache a glyph, in bytes
#define GLYPH_ALLOC_SIZE 8100
// Do all cached glyph memory allocations
// in 8k chunks
#define HGLYPH_SENTINEL ((ULONG) -1)
// GDI will never give us a glyph with a
// handle value of 0xffffffff, so we can
// use this as a sentinel for the end of
// our linked lists
#define GLYPH_HASH_SIZE 256
#define GLYPH_HASH_FUNC(x) ((x) & (GLYPH_HASH_SIZE - 1))
typedef struct _CACHEDGLYPH CACHEDGLYPH;typedef struct _CACHEDGLYPH{ CACHEDGLYPH* pcgNext; // Points to next glyph that was assigned
// to the same hash table bucket
HGLYPH hg; // Handles in the bucket-list are kept in
// increasing order
POINTL ptlOrigin; // Origin of glyph bits
// Device specific fields below here:
LONG cy; // Glyph height
LONG cxLessOne; // Glyph width, less one
ULONG ulLinearStart; // Linear start address of glyph in off-screen
// memory
ULONG ulLinearEnd;// Linear end address
} CACHEDGLYPH; /* cg, pcg */
typedef struct _GLYPHALLOC GLYPHALLOC;typedef struct _GLYPHALLOC{ GLYPHALLOC* pgaNext; // Points to next glyph structure that
// was allocated for this font
CACHEDGLYPH acg[1]; // This array is a bit misleading, because
// the CACHEDGLYPH structures are actually
// variable sized
} GLYPHAALLOC; /* ga, pga */
typedef struct _CACHEDFONT CACHEDFONT;typedef struct _CACHEDFONT{ CACHEDFONT* pcfNext; // Points to next entry in CACHEDFONT list
CACHEDFONT* pcfPrev; // Points to previous entry in CACHEDFONT list
GLYPHALLOC* pgaChain; // Points to start of allocated memory list
CACHEDGLYPH* pcgNew; // Points to where in the current glyph
// allocation structure a new glyph should
// be placed
LONG cjAlloc; // Bytes remaining in current glyph allocation
// structure
CACHEDGLYPH cgSentinel; // Sentinel entry of the end of our bucket
// lists, with a handle of HGLYPH_SENTINEL
CACHEDGLYPH* apcg[GLYPH_HASH_SIZE]; // Hash table for glyphs
} CACHEDFONT; /* cf, pcf */
BOOL bEnableText(PDEV*);VOID vDisableText(PDEV*);VOID vAssertModeText(PDEV*, BOOL);
//////////////////////////////////////////////////////////////////////
// Brush stuff
#define BRUSH_CACHE_HEIGHT 2 // Number of scans to allocate for brush cache
#define RBRUSH_2COLOR 1 // Monochrome brush
#define TOTAL_BRUSH_SIZE 64 // We'll only ever handle 8x8 patterns,
// and this is the number of pels
typedef union _RBRUSH_COLOR RBRUSH_COLOR;typedef VOID (FNFILL)(PDEV*, LONG, RECTL*, ULONG, RBRUSH_COLOR, POINTL*);
typedef struct _BRUSHENTRY BRUSHENTRY;
typedef struct _RBRUSH { FLONG fl; // RBRUSH_ type flags
ULONG ulColor[2]; // 0 -- background colour if 2-colour brush
// 1 -- foreground colour if 2-colour brush
FNFILL* pfnFillPat; // Fill routine to be called for this brush
BRUSHENTRY* apbe[MAX_BOARDS];// Points to brush-entry that keeps track
// of the cached off-screen brush bits
ULONG aulPattern[1]; // Open-ended array for keeping copy of the
// Don't put anything // actual pattern bits in case the brush
// after here, or // origin changes, or someone else steals
// you'll be sorry! // our brush entry (declared as a ULONG
// for proper dword alignment)
} RBRUSH; /* rb, prb */
typedef struct _BRUSHENTRY { RBRUSH* prbVerify; // We never dereference this pointer to
// find a brush realization; it is only
// ever used in a compare to verify
// that for a given realized brush, our
// off-screen brush entry is still valid.
ULONG ulLeft; // 'FXLEFT' coordinate for writing pattern
// assuming a stride of 32
ULONG ulYDst; // 'YDST' coordinate for writing pattern,
// assuming a stride of 32
ULONG ulLinear; // Linear start address of brush
VOID* pvScan0; // Address of pattern (brush)
} BRUSHENTRY; /* be, pbe */
typedef union _RBRUSH_COLOR { RBRUSH* prb; ULONG iSolidColor;} RBRUSH_COLOR; /* rbc, prbc */
VOID vMgaPatRealize8bpp(PDEV*, RBRUSH*);
BOOL bEnableBrushCache(PDEV*);VOID vDisableBrushCache(PDEV*);VOID vAssertModeBrushCache(PDEV*, BOOL);
//////////////////////////////////////////////////////////////////////
// Stretch stuff
typedef struct _STR_BLT { PDEV* ppdev; PBYTE pjSrcScan; LONG lDeltaSrc; LONG XSrcStart; PBYTE pjDstScan; LONG lDeltaDst; LONG XDstStart; LONG XDstEnd; LONG YDstStart; LONG YDstCount; ULONG ulXDstToSrcIntCeil; ULONG ulXDstToSrcFracCeil; ULONG ulYDstToSrcIntCeil; ULONG ulYDstToSrcFracCeil; ULONG ulXFracAccumulator; ULONG ulYFracAccumulator;} STR_BLT;
typedef VOID (*PFN_DIRSTRETCH)(STR_BLT*);
VOID vMgaDirectStretch8Narrow(STR_BLT*);VOID vMgaDirectStretch8(STR_BLT*);VOID vMgaDirectStretch16(STR_BLT*);
VOID vMilDirectStretch8Narrow(STR_BLT*);VOID vMilDirectStretch8(STR_BLT*);VOID vMilDirectStretch16(STR_BLT*);
//////////////////////////////////////////////////////////////////////
// Dither stuff
// Describes a single colour tetrahedron vertex for dithering:
typedef struct _VERTEX_DATA { ULONG ulCount; // Number of pixels in this vertex
ULONG ulVertex; // Vertex number
} VERTEX_DATA; /* vd, pv */
VERTEX_DATA* vComputeSubspaces(ULONG, VERTEX_DATA*);VOID vDitherColor(ULONG*, VERTEX_DATA*, VERTEX_DATA*, ULONG);VOID vRealize4ColorDither(RBRUSH*, ULONG);
/////////////////////////////////////////////////////////////////////////
// Heap stuff
typedef enum { OH_FREE = 0, // The off-screen allocation is available for use
OH_DISCARDABLE, // The allocation is occupied by a discardable bitmap
// that may be moved out of off-screen memory
OH_PERMANENT, // The allocation is occupied by a permanent bitmap
// that cannot be moved out of off-screen memory
} OHSTATE;
typedef struct _DSURF DSURF;typedef struct _OH OH;typedef struct _OH{ OHSTATE ohState; // State of off-screen allocation
LONG x; // x-coordinate of left edge of allocation
LONG y; // y-coordinate of top edge of allocation
LONG cx; // Width in pixels of allocation
LONG cy; // Height in pixels of allocation
LONG cxReserved; // Dimensions of original reserved rectangle;
LONG cyReserved; // zero if rectangle is not 'reserved'
OH* pohNext; // When OH_FREE or OH_RESERVE, points to the next
// free node, in ascending cxcy value. This is
// kept as a circular doubly-linked list with a
// sentinel at the end.
// When OH_DISCARDABLE, points to the next most
// recently created allocation. This is kept as
// a circular doubly-linked list.
OH* pohPrev; // Opposite of 'pohNext'
ULONG cxcy; // Width and height in a dword for searching
OH* pohLeft; // Adjacent allocation when in-use or available
OH* pohUp; OH* pohRight; OH* pohDown; DSURF* pdsurf; // Points to our DSURF structure
VOID* pvScan0; // Points to start of first scan-line
}; /* oh, poh */
// This is the smallest structure used for memory allocations:
typedef struct _OHALLOC OHALLOC;typedef struct _OHALLOC{ OHALLOC* pohaNext; OH aoh[1];} OHALLOC; /* oha, poha */
typedef struct _HEAP{ LONG cxMax; // Largest possible free space by area
LONG cyMax; LONG cxBounds; // Largest possible bounding rectangle
LONG cyBounds; OH ohFree; // Head of the free list, containing those
// rectangles in off-screen memory that are
// available for use. pohNext points to
// hte smallest available rectangle, and pohPrev
// points to the largest available rectangle,
// sorted by cxcy.
OH ohDiscardable; // Head of the discardable list that contains all
// bitmaps located in offscreen memory that
// are eligible to be tossed out of the heap.
// It is kept in order of creation: pohNext
// points to the most recently created; pohPrev
// points to the least recently created.
OH ohPermanent; // List of permanently allocated rectangles
OH* pohFreeList; // List of OH node data structures available
OHALLOC* pohaChain; // Chain of allocations
} HEAP; /* heap, pheap */
typedef enum { DT_SCREEN, // Surface is kept in screen memory
DT_DIB // Surface is kept as a DIB
} DSURFTYPE; /* dt, pdt */
typedef struct _DSURF{ DSURFTYPE dt; // DSURF status (whether off-screen or in a DIB)
BOOL bDirectDraw; // TRUE if this is a DSURF wrapped around a
// DirectDraw surface
SIZEL sizl; // Size of the original bitmap (could be smaller
// than poh->sizl)
PDEV* ppdev; // Need this for deleting the bitmap
union { OH* poh; // If DT_SCREEN, points to off-screen heap node
SURFOBJ* pso; // If DT_DIB, points to locked GDI surface
};
// The following are used for DT_DIB only...
ULONG cBlt; // Counts down the number of blts necessary at
// the current uniqueness before we'll consider
// putting the DIB back into off-screen memory
ULONG iUniq; // Tells us whether there have been any heap
// 'free's since the last time we looked at
// this DIB
} DSURF; /* dsurf, pdsurf */
// GDI expects dword alignment for any bitmaps on which it is expected
// to draw. Since we occasionally ask GDI to draw directly on our off-
// screen bitmaps, this means that any off-screen bitmaps must be dword
// aligned in the frame buffer. We enforce this merely by ensuring that
// all off-screen bitmaps are four-pel aligned (we may waste a couple of
// pixels at the higher colour depths):
#define HEAP_X_ALIGNMENT 4
// Number of blts necessary before we'll consider putting a DIB DFB back
// into off-screen memory:
#define HEAP_COUNT_DOWN 6
// Max number of WRAM boundaries that can't be crossed by the FASTBLT
// hardware on the STORM (Millennium).
#define MAX_WRAM_BARRIERS 3
// Flags for 'pohAllocate':
typedef enum { FLOH_ONLY_IF_ROOM = 0x0001, // Don't kick stuff out of off-
// screen memory to make room
FLOH_MAKE_PERMANENT = 0x0002, // Allocate a permanent entry
FLOH_RESERVE = 0x0004, // Allocate an off-screen entry,
// but let it be used by discardable
// bitmaps until it's needed
} FLOH;
// Publicly callable heap APIs:
OH* pohAllocate(PDEV*, POINTL*, LONG, LONG, FLOH);BOOL bOhCommit(PDEV*, OH*, BOOL);OH* pohFree(PDEV*, OH*);
OH* pohMoveOffscreenDfbToDib(PDEV*, OH*);BOOL bMoveDibToOffscreenDfbIfRoom(PDEV*, DSURF*);BOOL bMoveAllDfbsFromOffscreenToDibs(PDEV* ppdev);
BOOL bEnableOffscreenHeap(PDEV*);VOID vDisableOffscreenHeap(PDEV*);BOOL bAssertModeOffscreenHeap(PDEV*, BOOL);
/////////////////////////////////////////////////////////////////////////
// Pointer stuff
BOOL bEnablePointer(PDEV*);VOID vDisablePointer(PDEV*);VOID vAssertModePointer(PDEV*, BOOL);
/////////////////////////////////////////////////////////////////////////
// Palette stuff
BOOL bEnablePalette(PDEV*);VOID vDisablePalette();VOID vAssertModePalette(PDEV*, BOOL);
BOOL bInitializePalette(PDEV*, DEVINFO*);VOID vUninitializePalette(PDEV*);
#define MAX_CLUT_SIZE (sizeof(VIDEO_CLUT) + (sizeof(ULONG) * 256))
/////////////////////////////////////////////////////////////////////////
// DirectDraw stuff
#define ROUND_UP_TO_64K(x) (((ULONG)(x) + 0x10000 - 1) & ~(0x10000 - 1))
typedef struct _FLIPRECORD{ LONGLONG liFlipDuration; // Exact duration of a vertical refresh
// cycle
LONGLONG liFlipTime; // Exact time at which the flip command
// was given
FLATPTR fpFlipFrom; // Identifies the surface which was
// 'flipped from'. We have to prevent
// all drawing to this surface until we
// know that a vertical retrace has
// happened since the command was given,
// so it's now non-visible and thus safe
// to draw on.
DWORD dwScanLine; // Scan line that was current the last time
// we sampled whether the flip was
// complete
BOOL bFlipFlag; // Indicates whether a flip is pending
} FLIPRECORD;
BOOL bEnableDirectDraw(PDEV*);VOID vDisableDirectDraw(PDEV*);VOID vAssertModeDirectDraw(PDEV*, BOOL);
/////////////////////////////////////////////////////////////////////////
// DirectDraw stuff
BOOL bEnableMCD(PDEV*);VOID vDisableMCD(PDEV*);VOID vAssertModeMCD(PDEV*, BOOL);
//////////////////////////////////////////////////////////////////////
// Low-level blt function prototypes
typedef BOOL (FNBITBLT)(SURFOBJ*, SURFOBJ*, SURFOBJ*, CLIPOBJ*, XLATEOBJ*, RECTL*, POINTL*, POINTL*, BRUSHOBJ*, POINTL*, ROP4);
typedef VOID (FNXFER)(PDEV*, LONG, RECTL*, ULONG, SURFOBJ*, POINTL*, RECTL*, XLATEOBJ*);typedef VOID (FNCOPY)(PDEV*, LONG, RECTL*, ULONG, POINTL*, RECTL*);typedef BOOL (FNFASTFILL)(PDEV*, LONG, POINTFIX*, ULONG, ULONG, RBRUSH*, POINTL*, RECTL*);typedef VOID (FNPATREALIZE)(PDEV*, RBRUSH*);
FNFILL vFillPat1bpp;FNXFER vXfer4bpp;FNXFER vXfer8bpp;FNXFER vXferNative;FNFASTFILL bFastFill;
FNBITBLT bMilPuntBlt;FNPATREALIZE vMilPatRealize;FNPATREALIZE vMilPatRealize24bpp;FNFILL vMilFillPat;FNFILL vMilFillPat24bpp;FNFILL vMilFillSolid;FNXFER vMilXfer1bpp;FNCOPY vMilCopyBlt;
FNBITBLT bMgaPuntBlt;FNFILL vMgaFillPat8bpp;FNFILL vMgaFillPat16bpp;FNFILL vMgaFillPat24bpp;FNFILL vMgaFillSolid;FNXFER vMgaXfer1bpp;FNCOPY vMgaCopyBlt;
////////////////////////////////////////////////////////////////////////
// Capabilities flags
//
// These are private flags passed to us from the miniport. They
// come from the high word of the 'AttributeFlags' field of the
// 'VIDEO_MODE_INFORMATION' structure (found in 'ntddvdeo.h') passed
// to us via an 'VIDEO_QUERY_AVAIL_MODES' or 'VIDEO_QUERY_CURRENT_MODE'
// IOCTL.
//
// NOTE: These definitions must match those in the miniport's header!
typedef enum {} CAPS;
////////////////////////////////////////////////////////////////////////
// The Physical Device data structure
typedef struct _PDEV{ LONG xOffset; // DFB offset for current surface
LONG yOffset; // DFB offset for current surface
LONG cxMemory; // Width of video RAM
LONG cyMemory; // Height of video RAM
BYTE* pjBase; // Points to coprocessor base address
BYTE* pjScreen; // Points to base screen address
LONG lDelta; // Distance from one scan to the next.
ULONG ulYDstOrg; // Offset in pixels to be factored in
// whenever computing an MGA linear
// address
// -------------------------------------------------------------------
// NOTE: Changes up to here in the PDEV structure must be reflected in
// i386\strucs.inc (assuming you're on an x86, of course)!
LONG cjMemAvail; // Amount of video memory in bytes.
LONG iBoard; // Logical multi-board identifier
// (zero by default)
ULONG iBitmapFormat; // BMF_8BPP, BMF_16BPP, BMF_24BPP or
// BMF_32BPP (our current colour
// depth)
VOID* pvTmpBuffer; // General purpose temporary buffer,
// TMP_BUFFER_SIZE bytes in size
// (Remember to synchronize if you
// use this for device bitmaps or
// async pointers)
BOOL bEnabled; // In graphics mode (not full-screen)
CAPS flCaps; // Capabilities flags
ULONG flFeatures;
STATUSFLAGS flStatus; // Status flags
ULONG cjDmaOffset; // Current offset for next write into
// DMA window, used to avoid memory
// barriers on the Alpha
ULONG ulPlnWt; // Default write mask for mode
ULONG ulAccess; // Default MACCESS register state
ULONG ulBoardId; // MGA product ID
ULONG HopeFlags; // For register accelerations
HANDLE hDriver; // Handle to \Device\Screen
HDEV hdevEng; // Engine's handle to PDEV
HSURF hsurfScreen; // Engine's handle to screen surface
DSURF* pdsurfScreen; // Our private DSURF for the screen
LONG cxScreen; // Visible screen width
LONG cyScreen; // Visible screen height
ULONG ulMode; // Mode the mini-port driver is in.
FLONG flHooks; // What we're hooking from GDI
ULONG ulWhite; // 0xff if 8bpp, 0xffff if 16bpp,
// 0xffffffff if 32bpp
LONG cjPelSize; // Number of bytes per pel, according
// to GDI
LONG cjHwPel; // Number of bytes per pel, as stored
// in the frame buffer
ULONG ulRefresh; // For debug output
////////// Low-level blt function pointers:
FNFILL* pfnFillSolid; // Call this function for solid fills
FNFILL* pfnFillPatNative; FNXFER* pfnXfer1bpp; FNCOPY* pfnCopyBlt; FNBITBLT* pfnPuntBlt;
////////// Palette stuff:
PALETTEENTRY* pPal; // The palette if palette managed
HPALETTE hpalDefault; // GDI handle to the default palette.
FLONG flRed; // Red mask for 16/32bpp bitfields
FLONG flGreen; // Green mask for 16/32bpp bitfields
FLONG flBlue; // Blue mask for 16/32bpp bitfields
ULONG cPaletteShift; // number of bits the 8-8-8 palette must
// be shifted by to fit in the hardware
// palette.
////////// Heap stuff:
HEAP heap; // All our off-screen heap data
ULONG iHeapUniq; // Incremented every time room is freed
// in the off-screen heap
SURFOBJ* psoPunt; // Wrapper surface for having GDI draw
// on off-screen bitmaps
SURFOBJ* psoPunt2; // Another one for off-screen to off-
// screen blts
OH* pohScreen; // Off-screen heap structure for the
// visible screen
POINTL ptlOrg; // Where the screen 0,0 is anchored
// in the virtual display.
////////// Pointer stuff:
ULONG RamDacFlags; // Ramdac pointer type
SIZEL szlPointerOverscan; // Pointer overscan x and y
BOOL bHwPointerActive; // Currently using the h/w pointer?
POINTL ptlHotSpot; // For remembering pointer hot spot
LONG cyPointerHeight; // Current pointer-height
////////// Brush stuff:
LONG iBrushCache; // Index for next brush to be allocated
LONG cBrushCache; // Total number of brushes cached
BRUSHENTRY* pbe; // Keeps track of brush cache
BRUSHENTRY beUnrealizedBrush; // Place holder for unrealized brushes
LONG lPatSrcAdd; // Bug fix for the Storm
ULONG ulBrushSize; // Size of a brush realization in bytes
////////// Line stuff:
ULONG ulLineControl; // Control register for current line
// command
////////// Text stuff:
ULONG ulTextControl; // MGA DwgCtl setting for bltting
// text
ULONG ulGlyphCurrent; // Linear address of next glyph to be
// cached in off-screen memory
ULONG ulGlyphStart; // Linear address of start of glyph
// cache
ULONG ulGlyphEnd; // Linear address of end of glyph
// cache
CACHEDFONT cfSentinel; // Sentinel for the doubly-linked list
// we use to keep track of all
// cached font allocations
/////////// DirectDraw stuff:
FLIPRECORD flipRecord; // Used to track VBlank status
/////////// WRAM fast copy stuff:
LONG ayBreak[MAX_WRAM_BARRIERS]; // Array of the precalculated
// WRAM breaks in y.
LONG cyBreak; // Number of WRAM breaks in y.
////////// OpenGL MCD stuff:
ULONG iUniqueness; // display uniqueness for tracking
// resolution changes
LONG cDoubleBufferRef; // Reference count for current number
// of RC's that have active double-
// buffers
OH* pohBackBuffer; // Our 2-d heap allocation structure
// for the back-buffer
ULONG ulBackBuffer; // Byte offset in the frame buffer
// to the start of the back-buffer
LONG cZBufferRef; // Reference count for current number
// of RC's that have active z-buffers
// (which, on Athenta, is all RC's)
OH* pohZBuffer; // Our 2-d heap allocation structure
// for the z-buffer
ULONG ulFrontZBuffer; // Byte offset in the frame buffer
// to the start of the front z-buffer
// (the MGA sometimes has to have
// separate z-buffers for front and
// back)
ULONG ulBackZBuffer; // Byte offset in the frame buffer
// to the start of the back z-buffer
HANDLE hMCD; // Handle to MCD engine dll
MCDENGESCFILTERFUNC pMCDFilterFunc; // MCD engine filter function
// Added to support GetAvailDriverMemory callback in DDraw
ULONG ulTotalAvailVideoMemory;} PDEV, *PPDEV;
/////////////////////////////////////////////////////////////////////////
// Miscellaneous prototypes:
VOID vStretchDIB(PDEV*, RECTL*, VOID*, LONG, RECTL*, RECTL*);BOOL bIntersect(RECTL*, RECTL*, RECTL*);LONG cIntersect(RECTL*, RECTL*, LONG);DWORD getAvailableModes(HANDLE, PVIDEO_MODE_INFORMATION*, DWORD*);
BOOL bInitializeModeFields(PDEV*, GDIINFO*, DEVINFO*, DEVMODEW*);BOOL bSelectMode(HANDLE, DEVMODEW*, VIDEO_MODE_INFORMATION*, ULONG*);
BOOL bEnableHardware(PDEV*);VOID vDisableHardware(PDEV*);BOOL bAssertModeHardware(PDEV*, BOOL);
extern BYTE gaRop3FromMix[];extern BYTE gajFlip[];
/////////////////////////////////////////////////////////////////////////
// The x86 C compiler insists on making a divide and modulus operation
// into two DIVs, when it can in fact be done in one. So we use this
// macro.
//
// Note: QUOTIENT_REMAINDER implicitly takes unsigned arguments.
#if defined(i386)
#define QUOTIENT_REMAINDER(ulNumerator, ulDenominator, ulQuotient, ulRemainder) \
{ \ __asm mov eax, ulNumerator \ __asm sub edx, edx \ __asm div ulDenominator \ __asm mov ulQuotient, eax \ __asm mov ulRemainder, edx \}
#else
#define QUOTIENT_REMAINDER(ulNumerator, ulDenominator, ulQuotient, ulRemainder) \
{ \ ulQuotient = (ULONG) ulNumerator / (ULONG) ulDenominator; \ ulRemainder = (ULONG) ulNumerator % (ULONG) ulDenominator; \}
#endif
/////////////////////////////////////////////////////////////////////////
// OVERLAP - Returns TRUE if the same-size lower-right exclusive
// rectangles defined by 'pptl' and 'prcl' overlap:
#define OVERLAP(prcl, pptl) \
(((prcl)->right > (pptl)->x) && \ ((prcl)->bottom > (pptl)->y) && \ ((prcl)->left < ((pptl)->x + (prcl)->right - (prcl)->left)) && \ ((prcl)->top < ((pptl)->y + (prcl)->bottom - (prcl)->top)))
// Prototype to handle display (resolution) uniqueness for MCD:
ULONG GetDisplayUniqueness(PDEV *);
//////////////////////////////////////////////////////////////////////
// These Mul prototypes are thunks for multi-board support:
ULONG MulGetModes(HANDLE, ULONG, DEVMODEW*);DHPDEV MulEnablePDEV(DEVMODEW*, PWSTR, ULONG, HSURF*, ULONG, ULONG*, ULONG, DEVINFO*, HDEV, PWSTR, HANDLE);VOID MulCompletePDEV(DHPDEV, HDEV);HSURF MulEnableSurface(DHPDEV);BOOL MulStrokePath(SURFOBJ*, PATHOBJ*, CLIPOBJ*, XFORMOBJ*, BRUSHOBJ*, POINTL*, LINEATTRS*, MIX);BOOL MulFillPath(SURFOBJ*, PATHOBJ*, CLIPOBJ*, BRUSHOBJ*, POINTL*, MIX, FLONG);BOOL MulBitBlt(SURFOBJ*, SURFOBJ*, SURFOBJ*, CLIPOBJ*, XLATEOBJ*, RECTL*, POINTL*, POINTL*, BRUSHOBJ*, POINTL*, ROP4);VOID MulDisablePDEV(DHPDEV);VOID MulDisableSurface(DHPDEV);BOOL MulAssertMode(DHPDEV, BOOL);VOID MulMovePointer(SURFOBJ*, LONG, LONG, RECTL*);ULONG MulSetPointerShape(SURFOBJ*, SURFOBJ*, SURFOBJ*, XLATEOBJ*, LONG, LONG, LONG, LONG, RECTL*, FLONG);ULONG MulDitherColor(DHPDEV, ULONG, ULONG, ULONG*);BOOL MulSetPalette(DHPDEV, PALOBJ*, FLONG, ULONG, ULONG);BOOL MulCopyBits(SURFOBJ*, SURFOBJ*, CLIPOBJ*, XLATEOBJ*, RECTL*, POINTL*);BOOL MulTextOut(SURFOBJ*, STROBJ*, FONTOBJ*, CLIPOBJ*, RECTL*, RECTL*, BRUSHOBJ*, BRUSHOBJ*, POINTL*, MIX);VOID MulDestroyFont(FONTOBJ*);BOOL MulPaint(SURFOBJ*, CLIPOBJ*, BRUSHOBJ*, POINTL*, MIX);BOOL MulRealizeBrush(BRUSHOBJ*, SURFOBJ*, SURFOBJ*, SURFOBJ*, XLATEOBJ*, ULONG);HBITMAP MulCreateDeviceBitmap(DHPDEV, SIZEL, ULONG);VOID MulDeleteDeviceBitmap(DHSURF);ULONG MulEscape(SURFOBJ*, ULONG, ULONG, VOID*, ULONG, VOID*);
// These Dbg prototypes are thunks for debugging:
ULONG DbgGetModes(HANDLE, ULONG, DEVMODEW*);DHPDEV DbgEnablePDEV(DEVMODEW*, PWSTR, ULONG, HSURF*, ULONG, ULONG*, ULONG, DEVINFO*, HDEV, PWSTR, HANDLE);VOID DbgCompletePDEV(DHPDEV, HDEV);HSURF DbgEnableSurface(DHPDEV);BOOL DbgLineTo(SURFOBJ*, CLIPOBJ*, BRUSHOBJ*, LONG, LONG, LONG, LONG, RECTL*, MIX);BOOL DbgStrokePath(SURFOBJ*, PATHOBJ*, CLIPOBJ*, XFORMOBJ*, BRUSHOBJ*, POINTL*, LINEATTRS*, MIX);BOOL DbgFillPath(SURFOBJ*, PATHOBJ*, CLIPOBJ*, BRUSHOBJ*, POINTL*, MIX, FLONG);BOOL DbgBitBlt(SURFOBJ*, SURFOBJ*, SURFOBJ*, CLIPOBJ*, XLATEOBJ*, RECTL*, POINTL*, POINTL*, BRUSHOBJ*, POINTL*, ROP4);VOID DbgDisablePDEV(DHPDEV);VOID DbgDisableSurface(DHPDEV);BOOL DbgAssertMode(DHPDEV, BOOL);BOOL DbgOffset(SURFOBJ*,LONG,LONG,FLONG);VOID DbgMovePointer(SURFOBJ*, LONG, LONG, RECTL*);ULONG DbgSetPointerShape(SURFOBJ*, SURFOBJ*, SURFOBJ*, XLATEOBJ*, LONG, LONG, LONG, LONG, RECTL*, FLONG);ULONG DbgDitherColor(DHPDEV, ULONG, ULONG, ULONG*);BOOL DbgSetPalette(DHPDEV, PALOBJ*, FLONG, ULONG, ULONG);BOOL DbgCopyBits(SURFOBJ*, SURFOBJ*, CLIPOBJ*, XLATEOBJ*, RECTL*, POINTL*);BOOL DbgTextOut(SURFOBJ*, STROBJ*, FONTOBJ*, CLIPOBJ*, RECTL*, RECTL*, BRUSHOBJ*, BRUSHOBJ*, POINTL*, MIX);VOID DbgDestroyFont(FONTOBJ*);BOOL DbgPaint(SURFOBJ*, CLIPOBJ*, BRUSHOBJ*, POINTL*, MIX);BOOL DbgRealizeBrush(BRUSHOBJ*, SURFOBJ*, SURFOBJ*, SURFOBJ*, XLATEOBJ*, ULONG);HBITMAP DbgCreateDeviceBitmap(DHPDEV, SIZEL, ULONG);VOID DbgDeleteDeviceBitmap(DHSURF);BOOL DbgStretchBlt(SURFOBJ*, SURFOBJ*, SURFOBJ*, CLIPOBJ*, XLATEOBJ*, COLORADJUSTMENT*, POINTL*, RECTL*, RECTL*, POINTL*, ULONG);ULONG DbgEscape(SURFOBJ*, ULONG, ULONG, VOID*, ULONG, VOID*);BOOL DbgResetPDEV(DHPDEV, DHPDEV);BOOL DbgGetDirectDrawInfo(DHPDEV, DD_HALINFO*, DWORD*, VIDEOMEMORY*, DWORD*, DWORD*);BOOL DbgEnableDirectDraw(DHPDEV, DD_CALLBACKS*, DD_SURFACECALLBACKS*, DD_PALETTECALLBACKS*);VOID DbgDisableDirectDraw(DHPDEV);BOOL DbgIcmSetDeviceGammaRamp(DHPDEV, ULONG, LPVOID);
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