Ticket #163: dummy_driver.c.whitespaced

/*
 * Copyright 2002, SuSE Linux AG, Author: Egbert Eich
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

/* All drivers should typically include these */
#include "xf86.h"
#include "xf86_OSproc.h"

/* All drivers initialising the SW cursor need this */
#include "mipointer.h"

/* All drivers using the mi colormap manipulation need this */
#include "micmap.h"

#ifdef RANDR
#include "randrstr.h"
#endif

#include "windowstr.h"

/* identifying atom needed by magnifiers */
#include <X11/Xatom.h>
#include "property.h"

#include "xf86cmap.h"

#include "xf86fbman.h"

#include "fb.h"

#include "picturestr.h"

#ifdef XvExtension
#include "xf86xv.h"
#include <X11/extensions/Xv.h>
#endif

/*
 * Driver data structures.
 */
#include "dummy.h"

/* These need to be checked */
#include <X11/X.h>
#include <X11/Xproto.h>
#include "scrnintstr.h"
#include "servermd.h"
#ifdef USE_DGA
#define _XF86DGA_SERVER_
#include <X11/extensions/xf86dgaproto.h>
#endif

/* Mandatory functions */
static const OptionInfoRec *    DUMMYAvailableOptions(int chipid, int busid);
static void             DUMMYIdentify(int flags);
static Bool             DUMMYProbe(DriverPtr drv, int flags);
static Bool             DUMMYPreInit(ScrnInfoPtr pScrn, int flags);
static Bool             DUMMYScreenInit(SCREEN_INIT_ARGS_DECL);
static Bool             DUMMYEnterVT(VT_FUNC_ARGS_DECL);
static void             DUMMYLeaveVT(VT_FUNC_ARGS_DECL);
static Bool             DUMMYCloseScreen(CLOSE_SCREEN_ARGS_DECL);
static Bool             DUMMYCreateWindow(WindowPtr pWin);
static void             DUMMYFreeScreen(FREE_SCREEN_ARGS_DECL);
static ModeStatus       DUMMYValidMode(SCRN_ARG_TYPE arg, DisplayModePtr mode,
                                                                        Bool verbose, int flags);
static Bool     DUMMYSaveScreen(ScreenPtr pScreen, int mode);

/* Internally used functions */
static Bool             dummyModeInit(ScrnInfoPtr pScrn, DisplayModePtr mode);
static void     dummySave(ScrnInfoPtr pScrn);
static void     dummyRestore(ScrnInfoPtr pScrn, Bool restoreText);
static Bool     dummyDriverFunc(ScrnInfoPtr pScrn, xorgDriverFuncOp op,
                                                        pointer ptr);


/* static void  DUMMYDisplayPowerManagementSet(ScrnInfoPtr pScrn, */
/*                                                                                              int PowerManagementMode,
 *                                                                                              int flags); */

#define DUMMY_VERSION 4000
#define DUMMY_NAME "DUMMY"
#define DUMMY_DRIVER_NAME "dummy"

#define DUMMY_MAJOR_VERSION PACKAGE_VERSION_MAJOR
#define DUMMY_MINOR_VERSION PACKAGE_VERSION_MINOR
#define DUMMY_PATCHLEVEL PACKAGE_VERSION_PATCHLEVEL

#define DUMMY_MAX_WIDTH 32767
#define DUMMY_MAX_HEIGHT 32767

/*
 * This is intentionally screen-independent.  It indicates the binding
 * choice made in the first PreInit.
 */
static int pix24bpp = 0;


/*
 * This contains the functions needed by the server after loading the driver
 * module.  It must be supplied, and gets passed back by the SetupProc
 * function in the dynamic case.  In the static case, a reference to this
 * is compiled in, and this requires that the name of this DriverRec be
 * an upper-case version of the driver name.
 */

_X_EXPORT DriverRec DUMMY = {
        DUMMY_VERSION,
        DUMMY_DRIVER_NAME,
        DUMMYIdentify,
        DUMMYProbe,
        DUMMYAvailableOptions,
        NULL,
        0,
        dummyDriverFunc
};

static SymTabRec DUMMYChipsets[] = {
        { DUMMY_CHIP,   "dummy" },
        { -1,                   NULL }
};

typedef enum {
        OPTION_SW_CURSOR,
        OPTION_CONSTANT_DPI
} DUMMYOpts;

static const OptionInfoRec DUMMYOptions[] = {
        { OPTION_SW_CURSOR,             "SWcursor",             OPTV_BOOLEAN,   {0}, FALSE },
#ifdef RANDR
        { OPTION_CONSTANT_DPI,  "ConstantDPI",  OPTV_BOOLEAN,   {0}, FALSE },
#endif
        { -1,                                   NULL,                   OPTV_NONE,              {0}, FALSE }
};

#ifdef XFree86LOADER

static MODULESETUPPROTO(dummySetup);

static XF86ModuleVersionInfo dummyVersRec =
{
        "dummy",
        MODULEVENDORSTRING,
        MODINFOSTRING1,
        MODINFOSTRING2,
        XORG_VERSION_CURRENT,
        DUMMY_MAJOR_VERSION, DUMMY_MINOR_VERSION, DUMMY_PATCHLEVEL,
        ABI_CLASS_VIDEODRV,
        ABI_VIDEODRV_VERSION,
        MOD_CLASS_VIDEODRV,
        {0,0,0,0}
};

/*
 * This is the module init data.
 * Its name has to be the driver name followed by ModuleData
 */
_X_EXPORT XF86ModuleData dummyModuleData = { &dummyVersRec, dummySetup, NULL };

static pointer
dummySetup(pointer module, pointer opts, int *errmaj, int *errmin)
{
        static Bool setupDone = FALSE;

        if (!setupDone) {
                setupDone = TRUE;
                xf86AddDriver(&DUMMY, module, HaveDriverFuncs);

                /*
                 * Modules that this driver always requires can be loaded here
                 * by calling LoadSubModule().
                 */

                /*
                 * The return value must be non-NULL on success even though there
                 * is no TearDownProc.
                 */
                return (pointer)1;
        } else {
                if (errmaj)
                        *errmaj = LDR_ONCEONLY;
                return NULL;
        }
}

#endif /* XFree86LOADER */

static Bool
DUMMYGetRec(ScrnInfoPtr pScrn)
{
        /*
         * Allocate a DUMMYRec, and hook it into pScrn->driverPrivate.
         * pScrn->driverPrivate is initialised to NULL, so we can check if
         * the allocation has already been done.
         */
        if (pScrn->driverPrivate != NULL)
                return TRUE;

        pScrn->driverPrivate = xnfcalloc(sizeof(DUMMYRec), 1);

        if (pScrn->driverPrivate == NULL)
                return FALSE;
        return TRUE;
}

static void
DUMMYFreeRec(ScrnInfoPtr pScrn)
{
        if (pScrn->driverPrivate == NULL)
                return;
        free(pScrn->driverPrivate);
        pScrn->driverPrivate = NULL;
}

static const OptionInfoRec *
DUMMYAvailableOptions(int chipid, int busid)
{
        return DUMMYOptions;
}

/* Mandatory */
static void
DUMMYIdentify(int flags)
{
        xf86PrintChipsets(DUMMY_NAME, "Driver for Dummy chipsets",
                        DUMMYChipsets);
}

/* Mandatory */
static Bool
DUMMYProbe(DriverPtr drv, int flags)
{
        Bool foundScreen = FALSE;
        int numDevSections, numUsed;
        GDevPtr *devSections;
        int i;

        if (flags & PROBE_DETECT)
                return FALSE;
        /*
         * Find the config file Device sections that match this
         * driver, and return if there are none.
         */
        if ((numDevSections = xf86MatchDevice(DUMMY_DRIVER_NAME,
                                                                        &devSections)) <= 0) {
                return FALSE;
        }

        numUsed = numDevSections;

        if (numUsed > 0) {
                for (i = 0; i < numUsed; i++) {
                        ScrnInfoPtr pScrn = NULL;
                        int entityIndex = 
                        xf86ClaimNoSlot(drv,DUMMY_CHIP,devSections[i],TRUE);
                        /* Allocate a ScrnInfoRec and claim the slot */
                        if ((pScrn = xf86AllocateScreen(drv,0 ))) {
                                xf86AddEntityToScreen(pScrn,entityIndex);
                                pScrn->driverVersion    = DUMMY_VERSION;
                                pScrn->driverName               = DUMMY_DRIVER_NAME;
                                pScrn->name                             = DUMMY_NAME;
                                pScrn->Probe                    = DUMMYProbe;
                                pScrn->PreInit                  = DUMMYPreInit;
                                pScrn->ScreenInit               = DUMMYScreenInit;
                                pScrn->SwitchMode               = DUMMYSwitchMode;
                                pScrn->AdjustFrame              = DUMMYAdjustFrame;
                                pScrn->EnterVT                  = DUMMYEnterVT;
                                pScrn->LeaveVT                  = DUMMYLeaveVT;
                                pScrn->FreeScreen               = DUMMYFreeScreen;
                                pScrn->ValidMode                = DUMMYValidMode;
        
                                foundScreen = TRUE;
                        }
                }
        }       
        return foundScreen;
}

# define RETURN \
        { DUMMYFreeRec(pScrn);\
                                return FALSE;\
                                                 }

/* Mandatory */
Bool
DUMMYPreInit(ScrnInfoPtr pScrn, int flags)
{
        ClockRangePtr clockRanges;
        int i;
        DUMMYPtr dPtr;
        int maxClock = 230000;
        GDevPtr device = xf86GetEntityInfo(pScrn->entityList[0])->device;

        if (flags & PROBE_DETECT) {
                return TRUE;
        }
        
        /* Allocate the DummyRec driverPrivate */
        if (!DUMMYGetRec(pScrn)) {
                return FALSE;
        }
        
        dPtr = DUMMYPTR(pScrn);

        pScrn->chipset = (char *)xf86TokenToString(DUMMYChipsets,
                                                                DUMMY_CHIP);

        xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Chipset is a DUMMY\n");
        
        pScrn->monitor = pScrn->confScreen->monitor;

        if (!xf86SetDepthBpp(pScrn, 0, 0, 0, Support24bppFb | Support32bppFb))
                return FALSE;

        /* Check that the returned depth is one we support */
        switch (pScrn->depth) {
        case 8:
        case 15:
        case 16:
        case 24:
                break;
        default:
                xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
                                "Given depth (%d) is not supported by this driver\n",
                                pScrn->depth);
                return FALSE;
        }

        xf86PrintDepthBpp(pScrn);
        if (pScrn->depth == 8)
                pScrn->rgbBits = 8;

        /* Get the depth24 pixmap format */
        if (pScrn->depth == 24 && pix24bpp == 0)
                pix24bpp = xf86GetBppFromDepth(pScrn, 24);

        /*
         * This must happen after pScrn->display has been set because
         * xf86SetWeight references it.
         */
        if (pScrn->depth > 8) {
                /* The defaults are OK for us */
                rgb zeros = {0, 0, 0};

                if (!xf86SetWeight(pScrn, zeros, zeros)) {
                        return FALSE;
                } else {
                        /* XXX check that weight returned is supported */
                        ;
                }
        }

        if (!xf86SetDefaultVisual(pScrn, -1)) { 
                return FALSE;
        }

        if (pScrn->depth > 1) {
                Gamma zeros = {0.0, 0.0, 0.0};

                if (!xf86SetGamma(pScrn, zeros)) {
                        return FALSE;
                }
        }

        xf86CollectOptions(pScrn, device->options);
        /* Process the options */
        if (!(dPtr->Options = malloc(sizeof(DUMMYOptions)))) {
                return FALSE;
        }
        memcpy(dPtr->Options, DUMMYOptions, sizeof(DUMMYOptions));

        xf86ProcessOptions(pScrn->scrnIndex, pScrn->options, dPtr->Options);

        xf86GetOptValBool(dPtr->Options, OPTION_SW_CURSOR,&dPtr->swCursor);
        xf86GetOptValBool(dPtr->Options, OPTION_CONSTANT_DPI, &dPtr->constantDPI);

        if (device->videoRam != 0) {
                pScrn->videoRam = device->videoRam;
                xf86DrvMsg(pScrn->scrnIndex, X_CONFIG, "VideoRAM: %d kByte\n",
                                        pScrn->videoRam);
        } else {
                pScrn->videoRam = 4096;
                xf86DrvMsg(pScrn->scrnIndex, X_PROBED, "VideoRAM: %d kByte\n",
                                        pScrn->videoRam);
        }
        
        if (device->dacSpeeds[0] != 0) {
                maxClock = device->dacSpeeds[0];
                xf86DrvMsg(pScrn->scrnIndex, X_CONFIG, "Max Clock: %d kHz\n",
                                        maxClock);
        } else {
                xf86DrvMsg(pScrn->scrnIndex, X_PROBED, "Max Clock: %d kHz\n",
                                        maxClock);
        }

        pScrn->progClock = TRUE;
        /*
         * Setup the ClockRanges, which describe what clock ranges are available,
         * and what sort of modes they can be used for.
         */
        clockRanges = (ClockRangePtr)xnfcalloc(sizeof(ClockRange), 1);
        clockRanges->next = NULL;
        clockRanges->ClockMulFactor = 1;
        clockRanges->minClock = 11000;          /* guessed §§§ */
        clockRanges->maxClock = 300000;
        clockRanges->clockIndex = -1;           /* programmable */
        clockRanges->interlaceAllowed = TRUE; 
        clockRanges->doubleScanAllowed = TRUE;

        /* Subtract memory for HW cursor */

        {
                int apertureSize = (pScrn->videoRam * 1024);
                i = xf86ValidateModes(pScrn, pScrn->monitor->Modes,
                                                pScrn->display->modes, clockRanges,
                                                NULL, 256, DUMMY_MAX_WIDTH,
                                                (8 * pScrn->bitsPerPixel),
                                                128, DUMMY_MAX_HEIGHT, pScrn->display->virtualX,
                                                pScrn->display->virtualY, apertureSize,
                                                LOOKUP_BEST_REFRESH);
        
                        if (i == -1) {
                                RETURN;
                        }
        }

        /* Prune the modes marked as invalid */
        xf86PruneDriverModes(pScrn);

        if (i == 0 || pScrn->modes == NULL) {
                xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "No valid modes found\n");
                RETURN;
        }

        /*
         * Set the CRTC parameters for all of the modes based on the type
         * of mode, and the chipset's interlace requirements.
         *
         * Calling this is required if the mode->Crtc* values are used by the
         * driver and if the driver doesn't provide code to set them.  They
         * are not pre-initialised at all.
         */
        xf86SetCrtcForModes(pScrn, 0); 
 
        /* Set the current mode to the first in the list */
        pScrn->currentMode = pScrn->modes;

        /* Print the list of modes being used */
        xf86PrintModes(pScrn);

        /* If monitor resolution is set on the command line, use it */
        xf86SetDpi(pScrn, 0, 0);

        if (xf86LoadSubModule(pScrn, "fb") == NULL) {
                RETURN;
        }

        if (!dPtr->swCursor) {
                if (!xf86LoadSubModule(pScrn, "ramdac")) {
                        RETURN;
                }
        }
        
        /* We have no contiguous physical fb in physical memory */
        pScrn->memPhysBase = 0;
        pScrn->fbOffset = 0;

        return TRUE;
}
#undef RETURN

/* Mandatory */
static Bool
DUMMYEnterVT(VT_FUNC_ARGS_DECL)
{
        SCRN_INFO_PTR(arg);
        
        /* Should we re-save the text mode on each VT enter? */
        if(!dummyModeInit(pScrn, pScrn->currentMode)) {
                return FALSE;
        }

        DUMMYAdjustFrame(ADJUST_FRAME_ARGS(pScrn, pScrn->frameX0, pScrn->frameY0));
        return TRUE;
}

/* Mandatory */
static void
DUMMYLeaveVT(VT_FUNC_ARGS_DECL)
{
        SCRN_INFO_PTR(arg);
        dummyRestore(pScrn, TRUE);
}

static void
DUMMYLoadPalette(ScrnInfoPtr pScrn, int numColors, int *indices,
        LOCO *colors, VisualPtr pVisual)
{
        int i, index, shift, Gshift;
        DUMMYPtr dPtr = DUMMYPTR(pScrn);

        switch(pScrn->depth) {
        case 15:        
                shift = Gshift = 1;
                break;
        case 16:
                shift = 0; 
                Gshift = 0;
                break;
        default:
                shift = Gshift = 0;
                break;
        }

        for(i = 0; i < numColors; i++) {
                index = indices[i];
                dPtr->colors[index].red = colors[index].red << shift;
                dPtr->colors[index].green = colors[index].green << Gshift;
                dPtr->colors[index].blue = colors[index].blue << shift;
        }
}

static ScrnInfoPtr DUMMYScrn; /* static-globalize it */

/* Mandatory */
static Bool
DUMMYScreenInit(SCREEN_INIT_ARGS_DECL)
{
        ScrnInfoPtr pScrn;
        DUMMYPtr dPtr;
        int ret;
        VisualPtr visual;
        
        /*
         * we need to get the ScrnInfoRec for this screen, so let's allocate
         * one first thing
         */
        pScrn = xf86ScreenToScrn(pScreen);
        dPtr = DUMMYPTR(pScrn);
        DUMMYScrn = pScrn;

        if (!(dPtr->FBBase = malloc(pScrn->videoRam * 1024))) {
                return FALSE;
        }
        
        /*
         * next we save the current state and setup the first mode
         */
        dummySave(pScrn);
        
        if (!dummyModeInit(pScrn,pScrn->currentMode)) {
                return FALSE;
        }
        DUMMYAdjustFrame(ADJUST_FRAME_ARGS(pScrn, pScrn->frameX0, pScrn->frameY0));

        /*
         * Reset visual list.
         */
        miClearVisualTypes();
        
        /* Setup the visuals we support. */
        
        if (!miSetVisualTypes(pScrn->depth,
                                                        miGetDefaultVisualMask(pScrn->depth),
                                                        pScrn->rgbBits, pScrn->defaultVisual)) {
                 return FALSE;
        }

        if (!miSetPixmapDepths ()) {
                return FALSE;
        }

        /*
         * Call the framebuffer layer's ScreenInit function, and fill in other
         * pScreen fields.
         */
        ret = fbScreenInit(pScreen, dPtr->FBBase,
                                pScrn->virtualX, pScrn->virtualY,
                                pScrn->xDpi, pScrn->yDpi,
                                pScrn->displayWidth, pScrn->bitsPerPixel);
        if (!ret) {
                return FALSE;
        }

        if (pScrn->depth > 8) {
                /* Fixup RGB ordering */
                visual = pScreen->visuals + pScreen->numVisuals;
                while (--visual >= pScreen->visuals) {
                        if ((visual->class | DynamicClass) == DirectColor) {
                                visual->offsetRed = pScrn->offset.red;
                                visual->offsetGreen = pScrn->offset.green;
                                visual->offsetBlue = pScrn->offset.blue;
                                visual->redMask = pScrn->mask.red;
                                visual->greenMask = pScrn->mask.green;
                                visual->blueMask = pScrn->mask.blue;
                        }
                }
        }
        
        /* must be after RGB ordering fixed */
        fbPictureInit(pScreen, 0, 0);

        xf86SetBlackWhitePixels(pScreen);

#ifdef USE_DGA
        DUMMYDGAInit(pScreen);
#endif
        
        if (dPtr->swCursor) {
                xf86DrvMsg(pScrn->scrnIndex, X_CONFIG, "Using Software Cursor.\n");
        }


        {
                BoxRec AvailFBArea;
                int lines = pScrn->videoRam * 1024 /
                        (pScrn->displayWidth * (pScrn->bitsPerPixel >> 3));
                AvailFBArea.x1 = 0;
                AvailFBArea.y1 = 0;
                AvailFBArea.x2 = pScrn->displayWidth;
                AvailFBArea.y2 = lines;
                xf86InitFBManager(pScreen, &AvailFBArea); 
                
                xf86DrvMsg(pScrn->scrnIndex, X_INFO, 
                                "Using %i scanlines of offscreen memory \n"
                                , lines - pScrn->virtualY);
        }

        xf86SetBackingStore(pScreen);
        xf86SetSilkenMouse(pScreen);
        
        /* Initialise cursor functions */
        miDCInitialize (pScreen, xf86GetPointerScreenFuncs());


        if (!dPtr->swCursor) {
                /* HW cursor functions */
                if (!DUMMYCursorInit(pScreen)) {
                        xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
                                                "Hardware cursor initialization failed\n");
                        return FALSE;
                }
        }

        /* Initialise default colourmap */
        if (!miCreateDefColormap(pScreen)) {
                return FALSE;
        }

        if (!xf86HandleColormaps(pScreen, 256, pScrn->rgbBits,
                                                 DUMMYLoadPalette, NULL, 
                                                 CMAP_PALETTED_TRUECOLOR 
                                 | CMAP_RELOAD_ON_MODE_SWITCH)) {
                return FALSE;
        }

/*       DUMMYInitVideo(pScreen); */

        pScreen->SaveScreen = DUMMYSaveScreen;

        
        /* Wrap the current CloseScreen function */
        dPtr->CloseScreen = pScreen->CloseScreen;
        pScreen->CloseScreen = DUMMYCloseScreen;

        /* Wrap the current CreateWindow function */
        dPtr->CreateWindow = pScreen->CreateWindow;
        pScreen->CreateWindow = DUMMYCreateWindow;

        /* Report any unused options (only for the first generation) */
        if (serverGeneration == 1) {
                xf86ShowUnusedOptions(pScrn->scrnIndex, pScrn->options);
        }

        return TRUE;
}

const char *XDPY_PROPERTY = "dummy-constant-xdpi";
const char *YDPY_PROPERTY = "dummy-constant-ydpi";
static int get_dpi_value(WindowPtr root, const char *property_name, int default_dpi)
{
        PropertyPtr prop;
        Atom type_atom = MakeAtom("CARDINAL", 8, TRUE);
        Atom prop_atom = MakeAtom(property_name, strlen(property_name), FALSE);

        for (prop = wUserProps(root); prop; prop = prop->next) {
                if (prop->propertyName == prop_atom && prop->type == type_atom && prop->data) {
                        int v = (int) (*((CARD32 *) prop->data));
                        if ((v>0) && (v<4096)) {
                                xf86DrvMsg(0, X_INFO, "get_constant_dpi_value() found property \"%s\" with value=%i\n", property_name, (int) v);
                                return (int) v;
                        }
                        break;
                }
        }
        return default_dpi;
}

/* Mandatory */
Bool
DUMMYSwitchMode(SWITCH_MODE_ARGS_DECL)
{
        SCRN_INFO_PTR(arg);
        if (!dummyModeInit(pScrn, mode)) {
                return FALSE;
        }
#ifdef RANDR
        DUMMYPtr dPtr = DUMMYPTR(pScrn);
        if (dPtr->constantDPI) {
                int xDpi = get_dpi_value(pScrn->pScreen->root, XDPY_PROPERTY, pScrn->xDpi);
                int yDpi = get_dpi_value(pScrn->pScreen->root, YDPY_PROPERTY, pScrn->yDpi);
                //25.4 mm per inch: (254/10)
                pScrn->pScreen->mmWidth = mode->HDisplay * 254 / xDpi / 10;
                pScrn->pScreen->mmHeight = mode->VDisplay * 254 / yDpi / 10;
                xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "mm(dpi %ix%i)=%ix%i\n", xDpi, yDpi, pScrn->pScreen->mmWidth, pScrn->pScreen->mmHeight);
                RRScreenSizeNotify(pScrn->pScreen);
                RRTellChanged(pScrn->pScreen);
        }
#endif
        return TRUE;
}

/* Mandatory */
void
DUMMYAdjustFrame(ADJUST_FRAME_ARGS_DECL)
{
        SCRN_INFO_PTR(arg);
        int Base; 

        Base = (y * pScrn->displayWidth + x) >> 2;

        /* Scale Base by the number of bytes per pixel. */
        switch (pScrn->depth) {
        case 8 :
                break;
        case 15 :
        case 16 :
                Base *= 2;
                break;
        case 24 :
                Base *= 3;
                break;
        default :
                break;
        }
}

/* Mandatory */
static Bool
DUMMYCloseScreen(CLOSE_SCREEN_ARGS_DECL)
{
        ScrnInfoPtr pScrn = xf86ScreenToScrn(pScreen);
        DUMMYPtr dPtr = DUMMYPTR(pScrn);

        if (pScrn->vtSema) {
                dummyRestore(pScrn, TRUE);
                free(dPtr->FBBase);
        }

        if (dPtr->CursorInfo) {
                xf86DestroyCursorInfoRec(dPtr->CursorInfo);
        }

        pScrn->vtSema = FALSE;
        pScreen->CloseScreen = dPtr->CloseScreen;
        return (*pScreen->CloseScreen)(CLOSE_SCREEN_ARGS);
}

/* Optional */
static void
DUMMYFreeScreen(FREE_SCREEN_ARGS_DECL)
{
        SCRN_INFO_PTR(arg);
        DUMMYFreeRec(pScrn);
}

static Bool
DUMMYSaveScreen(ScreenPtr pScreen, int mode)
{
        ScrnInfoPtr pScrn = NULL;
        DUMMYPtr dPtr;

        if (pScreen != NULL) {
                pScrn = xf86ScreenToScrn(pScreen);
                dPtr = DUMMYPTR(pScrn);
        
                dPtr->screenSaver = xf86IsUnblank(mode);
        }
        return TRUE;
}

/* Optional */
static ModeStatus
DUMMYValidMode(SCRN_ARG_TYPE arg, DisplayModePtr mode, Bool verbose, int flags)
{
        return(MODE_OK);
}

static void
dummySave(ScrnInfoPtr pScrn)
{
}

static void 
dummyRestore(ScrnInfoPtr pScrn, Bool restoreText)
{
}
        
static Bool
dummyModeInit(ScrnInfoPtr pScrn, DisplayModePtr mode)
{
        dummyRestore(pScrn, FALSE);
        
        return(TRUE);
}

Atom VFB_PROP = 0;
#define VFB_PROP_NAME "VFB_IDENT"

static Bool
DUMMYCreateWindow(WindowPtr pWin)
{
        ScreenPtr pScreen = pWin->drawable.pScreen;
        DUMMYPtr dPtr = DUMMYPTR(DUMMYScrn);
        WindowPtr pWinRoot;
        int ret;

        pScreen->CreateWindow = dPtr->CreateWindow;
        ret = pScreen->CreateWindow(pWin);
        dPtr->CreateWindow = pScreen->CreateWindow;
        pScreen->CreateWindow = DUMMYCreateWindow;

        if (ret != TRUE) {
                return(ret);
        }
        
        if (dPtr->prop == FALSE) {
#if GET_ABI_MAJOR(ABI_VIDEODRV_VERSION) < 8
                pWinRoot = WindowTable[DUMMYScrn->pScreen->myNum];
#else
                pWinRoot = DUMMYScrn->pScreen->root;
#endif
                if (!ValidAtom(VFB_PROP)) {
                        VFB_PROP = MakeAtom(VFB_PROP_NAME, strlen(VFB_PROP_NAME), 1);
                }

                ret = ChangeWindowProperty(pWinRoot, VFB_PROP, XA_STRING, 
                                8, PropModeReplace, (int)4, (pointer)"TRUE", FALSE);
                if (ret != Success) {
                        ErrorF("Could not set VFB root window property");
                }
                dPtr->prop = TRUE;
        }
        return TRUE;
}

#ifndef HW_SKIP_CONSOLE
#define HW_SKIP_CONSOLE 4
#endif

static Bool
dummyDriverFunc(ScrnInfoPtr pScrn, xorgDriverFuncOp op, pointer ptr)
{
        CARD32 *flag;
        
        switch (op) {
        case GET_REQUIRED_HW_INTERFACES:
                flag = (CARD32*)ptr;
                (*flag) = HW_SKIP_CONSOLE;
                return TRUE;
        default:
                return FALSE;
        }
}