/***********************************************************
Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts,
and the Massachusetts Institute of Technology, Cambridge, Massachusetts.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its 
documentation for any purpose and without fee is hereby granted, 
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in 
supporting documentation, and that the names of Digital or MIT not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.  

DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.

******************************************************************/
/* $Header: mfbscrinit.c,v 1.45 87/06/15 02:41:52 sue Exp $ */

#include "X.h"
#include "Xproto.h"	/* for xColorItem */
#include "Xmd.h"
#include "scrnintstr.h"
#include "pixmapstr.h"
#include "resource.h"
#include "colormap.h"
#include "mfb.h"
#include "mistruct.h"
#include "dix.h"
#include "opaque.h"

ColormapPtr	pColormap;
static int
mfbFreeVisual(p, id)
    pointer p;
    int id;
{
    Xfree(p);
}

void
nopStoreColors(p1, i1, p2)
    pointer p1;
    int i1;
    pointer p2;
{
}

void
nopInstallColormap(p1)
    pointer p1;
{
}

void
nopUninstallColormap(p1)
    pointer p1;
{
}


/* dts * (inch/dot) * (25.4 mm / inch) = mm */
Bool
mfbScreenInit(index, pScreen, pbits, xsize, ysize, dpi)
    int index;
    register ScreenPtr pScreen;
    pointer pbits;		/* pointer to screen bitmap */
    int xsize, ysize;		/* in pixels */
    int dpi;			/* dots per inch */
{
    DepthPtr	pDepth;
    VisualPtr	pVisual;
    long	*pVids;
    register PixmapPtr pPixmap;
    Colormap	staticColormap;
    xColorItem	def;

    pScreen->myNum = index;
    pScreen->width = xsize;
    pScreen->height = ysize;
    pScreen->mmWidth = ((long)xsize * (long)254) / (dpi * 10);
    pScreen->mmHeight = ((long)ysize * (long)254) / (dpi * 10);
    pScreen->numDepths = 1;
    pScreen->GCperDepth[0] = (GCPtr)NULL;
    pScreen->GCperDepth[1] = (GCPtr)NULL;
    
    pScreen->allowedDepths = pDepth = (DepthPtr) Xalloc(sizeof(DepthRec));

    pScreen->rootDepth = 1;
    pScreen->rootVisual = FakeClientID(0);
    staticColormap = (Colormap) FakeClientID(0);
    pScreen->defColormap = staticColormap;
    pScreen->minInstalledCmaps = 0;
    pScreen->maxInstalledCmaps = 0;
    pScreen->whitePixel = 1;
    pScreen->blackPixel = 0;
    pScreen->backingStoreSupport = NotUseful;
    pScreen->saveUnderSupport = NotUseful;

    /* cursmin and cursmax are device specific */

    pScreen->numVisuals = 1;
    pScreen->visuals = pVisual = (VisualPtr) Xalloc(sizeof (VisualRec));

    pPixmap = (PixmapPtr )Xalloc(sizeof(PixmapRec));
    pPixmap->drawable.type = DRAWABLE_PIXMAP;
    pPixmap->drawable.depth = 1;
    pPixmap->drawable.pScreen = pScreen;
    pPixmap->drawable.serialNumber = 0;
    pPixmap->width = xsize;
    pPixmap->height = ysize;
    pPixmap->refcnt = 1;
    pPixmap->devPrivate = pbits;
    pPixmap->devKind = PixmapBytePad(xsize, 1);
    pScreen->devPrivate = (pointer)pPixmap;

    /* anything that mfb doesn't know about is assumed to be done
       elsewhere.  (we put in no-op only for things that we KNOW
       are really no-op.
    */
    pScreen->CreateWindow = mfbCreateWindow;
    pScreen->DestroyWindow = mfbDestroyWindow;
    pScreen->PositionWindow = mfbPositionWindow;
    pScreen->ChangeWindowAttributes = mfbChangeWindowAttributes;
    pScreen->RealizeWindow = mfbMapWindow;
    pScreen->UnrealizeWindow = mfbUnmapWindow;

    pScreen->RealizeFont = mfbRealizeFont;
    pScreen->UnrealizeFont = mfbUnrealizeFont;
    pScreen->GetImage = mfbGetImage;
    pScreen->GetSpans = mfbGetSpans;
    pScreen->CreateGC = mfbCreateGC;
    pScreen->CreatePixmap = mfbCreatePixmap;
    pScreen->DestroyPixmap = mfbDestroyPixmap;
    pScreen->ValidateTree = miValidateTree;

    pScreen->InstallColormap = nopInstallColormap;
    pScreen->UninstallColormap = nopUninstallColormap;
    pScreen->ListInstalledColormaps = mfbListInstalledColormaps;
    pScreen->GetStaticColormap = mfbGetStaticColormap;
    pScreen->StoreColors = nopStoreColors;
    pScreen->ResolveColor = mfbResolveColor;

    pScreen->RegionCreate = miRegionCreate;
    pScreen->RegionCopy = miRegionCopy;
    pScreen->RegionDestroy = miRegionDestroy;
    pScreen->Intersect = miIntersect;
    pScreen->Inverse = miInverse;
    pScreen->Union = miUnion;
    pScreen->Subtract = miSubtract;
    pScreen->RegionReset = miRegionReset;
    pScreen->TranslateRegion = miTranslateRegion;
    pScreen->RectIn = miRectIn;
    pScreen->PointInRegion = miPointInRegion;
    pScreen->WindowExposures = miWindowExposures;
    pScreen->RegionNotEmpty = miRegionNotEmpty;
    pScreen->RegionEmpty = miRegionEmpty;
    pScreen->RegionExtents = miRegionExtents;

    pVisual->vid = pScreen->rootVisual;
    pVisual->screen = index;
    pVisual->class = StaticGray;
    pVisual->redMask = 0;
    pVisual->greenMask = 0;
    pVisual->blueMask = 0;
    pVisual->bitsPerRGBValue = 1;
    pVisual->ColormapEntries = 2;

    pDepth->depth = 1;
    pDepth->numVids = 1;
    pDepth->vids = pVids = (long *) Xalloc(sizeof (long));
    pVids[0] = pScreen->rootVisual;	/* our one and only visual */
    AddResource(
      (long)pScreen->rootVisual, RT_VISUALID, (pointer)pVisual, mfbFreeVisual, RC_CORE);

    CreateColormap((long)staticColormap, pScreen, pVisual, (ColormapPtr)&pColormap, AllocAll, 0);
    /* this is a monochrome colormap, it only has two entries, just fill
     * them in by hand.  If it were a more complex static map, it would be
     * worth writing a for loop or three to initialize it */
    def.flags = DoRed | DoGreen | DoBlue;
    def.pixel = 0;
    def.red = def.green = def.blue = 0;
    StoreColors((ColormapPtr)pColormap, 1, &def);
    def.pixel = 1;
    def.red = def.green = def.blue = ~0;
    StoreColors((ColormapPtr)pColormap, 1, &def);

    /* we MIGHT return 0 if we had been keeping track of potential
       allocation failures.  one day someone will clean this up.
    */
    return 1;
}