source: vbox/trunk/src/VBox/Additions/x11/x11include/xorg-server-1.10.0/xf86RamDac.h

#ifndef _XF86RAMDAC_H
#define _XF86RAMDAC_H 1

#include "colormapst.h"
#include "xf86Cursor.h"

/* Define unique vendor codes for RAMDAC's */
#define VENDOR_IBM      0x0000
#define VENDOR_BT       0x0001
#define VENDOR_TI       0x0002

typedef struct _RamDacRegRec {
/* This is probably the nastiest assumption, we allocate 1024 slots for
 * ramdac registers, should be enough. I've checked IBM and TVP series 
 * and they seem o.k 
 * Then we allocate 768 entries for the DAC too. IBM640 needs 1024 -FIXME
 */
    unsigned short DacRegs[0x400];      /* register set */
    unsigned char DAC[0x300];           /* colour map */
    Bool Overlay;
} RamDacRegRec, *RamDacRegRecPtr;

typedef struct _RamDacHWRegRec {
    RamDacRegRec        SavedReg;
    RamDacRegRec        ModeReg;
} RamDacHWRec, *RamDacHWRecPtr;

typedef struct _RamDacRec {
    CARD32 RamDacType;

    void (*LoadPalette)(
        ScrnInfoPtr pScrn, 
        int numColors, 
        int *indices, 
        LOCO *colors,
        VisualPtr pVisual
    );

    unsigned char (*ReadDAC)(
        ScrnInfoPtr pScrn,
        CARD32
    );

    void (*WriteDAC)(
        ScrnInfoPtr pScrn,
        CARD32,
        unsigned char,
        unsigned char
    );

    void (*WriteAddress)(
        ScrnInfoPtr pScrn,
        CARD32
    );

    void (*WriteData)(
        ScrnInfoPtr pScrn,
        unsigned char
    );

    void (*ReadAddress)(
        ScrnInfoPtr pScrn,
        CARD32
    );

    unsigned char (*ReadData)(
        ScrnInfoPtr pScrn
    );
} RamDacRec, *RamDacRecPtr;

typedef struct _RamDacHelperRec {
    CARD32 RamDacType;

    void (*Restore)(
        ScrnInfoPtr pScrn,
        RamDacRecPtr ramdacPtr,
        RamDacRegRecPtr ramdacReg
    );

    void (*Save)(
        ScrnInfoPtr pScrn,
        RamDacRecPtr ramdacPtr,
        RamDacRegRecPtr ramdacReg
    );

    void (*SetBpp)(
        ScrnInfoPtr pScrn,
        RamDacRegRecPtr ramdacReg
    );

    void (*HWCursorInit)(
        xf86CursorInfoPtr infoPtr
    );
} RamDacHelperRec, *RamDacHelperRecPtr;

#define RAMDACHWPTR(p) ((RamDacHWRecPtr)((p)->privates[RamDacGetHWIndex()].ptr))

typedef struct _RamdacScreenRec {
    RamDacRecPtr        RamDacRec;
} RamDacScreenRec, *RamDacScreenRecPtr;
#define RAMDACSCRPTR(p) ((RamDacScreenRecPtr)((p)->privates[RamDacGetScreenIndex()].ptr))->RamDacRec

extern _X_EXPORT int RamDacHWPrivateIndex;
extern _X_EXPORT int RamDacScreenPrivateIndex;

typedef struct {
    int         token;
} RamDacSupportedInfoRec, *RamDacSupportedInfoRecPtr;

extern _X_EXPORT RamDacRecPtr RamDacCreateInfoRec(void);
extern _X_EXPORT RamDacHelperRecPtr RamDacHelperCreateInfoRec(void);
extern _X_EXPORT void RamDacDestroyInfoRec(RamDacRecPtr RamDacRec);
extern _X_EXPORT void RamDacHelperDestroyInfoRec(RamDacHelperRecPtr RamDacRec);
extern _X_EXPORT Bool RamDacInit(ScrnInfoPtr pScrn, RamDacRecPtr RamDacRec);
extern _X_EXPORT Bool RamDacHandleColormaps(ScreenPtr pScreen, int maxColors, int sigRGBbits,
                           unsigned int flags);
extern _X_EXPORT void RamDacFreeRec(ScrnInfoPtr pScrn);
extern _X_EXPORT int  RamDacGetHWIndex(void);

#endif /* _XF86RAMDAC_H */