mfbgc.c

早期freebsd实现

/***********************************************************
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.

******************************************************************/
/* $XConsortium: mfbgc.c,v 5.25 91/05/26 09:22:58 rws Exp $ */
#include "X.h"
#include "Xmd.h"
#include "Xproto.h"
#include "mfb.h"
#include "dixfontstr.h"
#include "fontstruct.h"
#include "gcstruct.h"
#include "windowstr.h"
#include "pixmapstr.h"
#include "scrnintstr.h"
#include "region.h"

#include "mistruct.h"

#include "maskbits.h"

static void mfbDestroyOps();

static GCFuncs	mfbFuncs = {
	mfbValidateGC,
	mfbChangeGC,
	mfbCopyGC,
	mfbDestroyGC,
	mfbChangeClip,
	mfbDestroyClip,
	mfbCopyClip,
};

static GCOps	whiteTECopyOps = {
	mfbWhiteSolidFS,
	mfbSetSpans,
	mfbPutImage,
	mfbCopyArea,
	mfbCopyPlane,
	mfbPolyPoint,
	mfbLineSS,
	mfbSegmentSS,
	miPolyRectangle,
	mfbZeroPolyArcSS,
	miFillPolygon,
	mfbPolyFillRect,
	mfbPolyFillArcSolid,
	miPolyText8,
	miPolyText16,
	miImageText8,
	miImageText16,
	mfbTEGlyphBltWhite,
	mfbPolyGlyphBltWhite,
	mfbSolidPP,
	NULL,
};

static GCOps	blackTECopyOps = {
	mfbBlackSolidFS,
	mfbSetSpans,
	mfbPutImage,
	mfbCopyArea,
	mfbCopyPlane,
	mfbPolyPoint,
	mfbLineSS,
	mfbSegmentSS,
	miPolyRectangle,
	mfbZeroPolyArcSS,
	miFillPolygon,
	mfbPolyFillRect,
	mfbPolyFillArcSolid,
	miPolyText8,
	miPolyText16,
	miImageText8,
	miImageText16,
	mfbTEGlyphBltBlack,
	mfbPolyGlyphBltBlack,
	mfbSolidPP,
	NULL,
};

static GCOps	whiteTEInvertOps = {
	mfbInvertSolidFS,
	mfbSetSpans,
	mfbPutImage,
	mfbCopyArea,
	mfbCopyPlane,
	mfbPolyPoint,
	mfbLineSS,
	mfbSegmentSS,
	miPolyRectangle,
	miZeroPolyArc,
	miFillPolygon,
	mfbPolyFillRect,
	mfbPolyFillArcSolid,
	miPolyText8,
	miPolyText16,
	miImageText8,
	miImageText16,
	mfbTEGlyphBltWhite,
	mfbPolyGlyphBltInvert,
	mfbSolidPP,
	NULL,
};

static GCOps	blackTEInvertOps = {
	mfbInvertSolidFS,
	mfbSetSpans,
	mfbPutImage,
	mfbCopyArea,
	mfbCopyPlane,
	mfbPolyPoint,
	mfbLineSS,
	mfbSegmentSS,
	miPolyRectangle,
	miZeroPolyArc,
	miFillPolygon,
	mfbPolyFillRect,
	mfbPolyFillArcSolid,
	miPolyText8,
	miPolyText16,
	miImageText8,
	miImageText16,
	mfbTEGlyphBltBlack,
	mfbPolyGlyphBltInvert,
	mfbSolidPP,
	NULL,
};

static GCOps	whiteCopyOps = {
	mfbWhiteSolidFS,
	mfbSetSpans,
	mfbPutImage,
	mfbCopyArea,
	mfbCopyPlane,
	mfbPolyPoint,
	mfbLineSS,
	mfbSegmentSS,
	miPolyRectangle,
	mfbZeroPolyArcSS,
	miFillPolygon,
	mfbPolyFillRect,
	mfbPolyFillArcSolid,
	miPolyText8,
	miPolyText16,
	miImageText8,
	miImageText16,
	mfbImageGlyphBltWhite,
	mfbPolyGlyphBltWhite,
	mfbSolidPP,
	NULL,
};

static GCOps	blackCopyOps = {
	mfbBlackSolidFS,
	mfbSetSpans,
	mfbPutImage,
	mfbCopyArea,
	mfbCopyPlane,
	mfbPolyPoint,
	mfbLineSS,
	mfbSegmentSS,
	miPolyRectangle,
	mfbZeroPolyArcSS,
	miFillPolygon,
	mfbPolyFillRect,
	mfbPolyFillArcSolid,
	miPolyText8,
	miPolyText16,
	miImageText8,
	miImageText16,
	mfbImageGlyphBltBlack,
	mfbPolyGlyphBltBlack,
	mfbSolidPP,
	NULL,
};

static GCOps	whiteInvertOps = {
	mfbInvertSolidFS,
	mfbSetSpans,
	mfbPutImage,
	mfbCopyArea,
	mfbCopyPlane,
	mfbPolyPoint,
	mfbLineSS,
	mfbSegmentSS,
	miPolyRectangle,
	miZeroPolyArc,
	miFillPolygon,
	mfbPolyFillRect,
	mfbPolyFillArcSolid,
	miPolyText8,
	miPolyText16,
	miImageText8,
	miImageText16,
	mfbImageGlyphBltWhite,
	mfbPolyGlyphBltInvert,
	mfbSolidPP,
	NULL,
};

static GCOps	blackInvertOps = {
	mfbInvertSolidFS,
	mfbSetSpans,
	mfbPutImage,
	mfbCopyArea,
	mfbCopyPlane,
	mfbPolyPoint,
	mfbLineSS,
	mfbSegmentSS,
	miPolyRectangle,
	miZeroPolyArc,
	miFillPolygon,
	mfbPolyFillRect,
	mfbPolyFillArcSolid,
	miPolyText8,
	miPolyText16,
	miImageText8,
	miImageText16,
	mfbImageGlyphBltBlack,
	mfbPolyGlyphBltInvert,
	mfbSolidPP,
	NULL,
};

static GCOps	whiteWhiteCopyOps = {
	mfbWhiteSolidFS,
	mfbSetSpans,
	mfbPutImage,
	mfbCopyArea,
	mfbCopyPlane,
	mfbPolyPoint,
	mfbLineSS,
	mfbSegmentSS,
	miPolyRectangle,
	mfbZeroPolyArcSS,
	miFillPolygon,
	mfbPolyFillRect,
	mfbPolyFillArcSolid,
	miPolyText8,
	miPolyText16,
	miImageText8,
	miImageText16,
	miImageGlyphBlt,
	mfbPolyGlyphBltWhite,
	mfbSolidPP,
	NULL,
};

static GCOps	blackBlackCopyOps = {
	mfbBlackSolidFS,
	mfbSetSpans,
	mfbPutImage,
	mfbCopyArea,
	mfbCopyPlane,
	mfbPolyPoint,
	mfbLineSS,
	mfbSegmentSS,
	miPolyRectangle,
	mfbZeroPolyArcSS,
	miFillPolygon,
	mfbPolyFillRect,
	mfbPolyFillArcSolid,
	miPolyText8,
	miPolyText16,
	miImageText8,
	miImageText16,
	miImageGlyphBlt,
	mfbPolyGlyphBltBlack,
	mfbSolidPP,
	NULL,
};

static GCOps	fgEqBgInvertOps = {
	mfbInvertSolidFS,
	mfbSetSpans,
	mfbPutImage,
	mfbCopyArea,
	mfbCopyPlane,
	mfbPolyPoint,
	mfbLineSS,
	mfbSegmentSS,
	miPolyRectangle,
	miZeroPolyArc,
	miFillPolygon,
	mfbPolyFillRect,
	mfbPolyFillArcSolid,
	miPolyText8,
	miPolyText16,
	miImageText8,
	miImageText16,
	miImageGlyphBlt,
	mfbPolyGlyphBltInvert,
	mfbSolidPP,
	NULL,
};

struct commonOps {
    int		    fg, bg;
    int		    rrop;
    int		    terminalFont;
    GCOps	    *ops;
    void	    (*fillArea)();
};

static struct commonOps mfbCommonOps[] = {
    { 1, 0, RROP_WHITE, 1, &whiteTECopyOps, mfbSolidWhiteArea },
    { 0, 1, RROP_BLACK, 1, &blackTECopyOps, mfbSolidBlackArea },
    { 1, 0, RROP_INVERT, 1, &whiteTEInvertOps, mfbSolidInvertArea },
    { 0, 1, RROP_INVERT, 1, &blackTEInvertOps, mfbSolidInvertArea },
    { 1, 0, RROP_WHITE, 0, &whiteCopyOps, mfbSolidWhiteArea },
    { 0, 1, RROP_BLACK, 0, &blackCopyOps, mfbSolidBlackArea },
    { 1, 0, RROP_INVERT, 0, &whiteInvertOps, mfbSolidInvertArea },
    { 0, 1, RROP_INVERT, 0, &blackInvertOps, mfbSolidInvertArea },
    { 1, 1, RROP_WHITE, 0, &whiteWhiteCopyOps, mfbSolidWhiteArea },
    { 0, 0, RROP_BLACK, 0, &blackBlackCopyOps, mfbSolidBlackArea },
    { 1, 1, RROP_INVERT, 0, &fgEqBgInvertOps, mfbSolidInvertArea },
    { 0, 0, RROP_INVERT, 0, &fgEqBgInvertOps, mfbSolidInvertArea },
};

#define numberCommonOps	(sizeof (mfbCommonOps) / sizeof (mfbCommonOps[0]))

static GCOps *
matchCommon (pGC)
    GCPtr   pGC;
{
    int	i;
    struct commonOps	*cop;
    mfbPrivGC		*priv;

    if (pGC->lineWidth != 0)
	return 0;
    if (pGC->lineStyle != LineSolid)
	return 0;
    if (pGC->fillStyle != FillSolid)
	return 0;
    if (!pGC->font ||
        FONTMAXBOUNDS(pGC->font,rightSideBearing) -
	FONTMINBOUNDS(pGC->font,leftSideBearing) > 32 ||
	FONTMINBOUNDS(pGC->font,characterWidth) < 0)
	return 0;
    priv = (mfbPrivGC *) pGC->devPrivates[mfbGCPrivateIndex].ptr;
    for (i = 0; i < numberCommonOps; i++) {
	cop = &mfbCommonOps[i];
	if ((pGC->fgPixel & 1) != cop->fg)
	    continue;
	if ((pGC->bgPixel & 1) != cop->bg)
	    continue;
	if (priv->rop != cop->rrop)
	    continue;
	if (cop->terminalFont && !TERMINALFONT(pGC->font))
	    continue;
	priv->FillArea = cop->fillArea;
	return cop->ops;
    }
    return 0;
}
  
/*
   to let hp displays with bit blt override the mfbCopyArea routine.
   XXX: currently ignores the pScreen argument
   XXX: and will break if multiple screens of different types are attached.
 */
void
mfbRegisterCopyAreaProc(pScreen, proc)
     ScreenPtr   pScreen;
     RegionPtr   (* proc)();
{
    whiteTECopyOps.CopyArea = proc;
    blackTECopyOps.CopyArea = proc;
    whiteTEInvertOps.CopyArea = proc;
    blackTEInvertOps.CopyArea = proc;
    whiteCopyOps.CopyArea = proc;
    blackCopyOps.CopyArea = proc;
    whiteInvertOps.CopyArea = proc;
    blackInvertOps.CopyArea = proc;
    whiteWhiteCopyOps.CopyArea = proc;
    blackBlackCopyOps.CopyArea = proc;
    fgEqBgInvertOps.CopyArea = proc;
}

Bool
mfbCreateGC(pGC)
    register GCPtr pGC;
{
    mfbPrivGC 	*pPriv;

    pGC->clientClip = NULL;
    pGC->clientClipType = CT_NONE;
    
    /* some of the output primitives aren't really necessary, since
       they will be filled in ValidateGC because of dix/CreateGC()
       setting all the change bits.  Others are necessary because although
       they depend on being a monochrome frame buffer, they don't change 
    */

    pGC->ops = &whiteCopyOps;
    pGC->funcs = &mfbFuncs;

    /* mfb wants to translate before scan convesion */
    pGC->miTranslate = 1;

    pPriv = (mfbPrivGC *)(pGC->devPrivates[mfbGCPrivateIndex].ptr);
    pPriv->rop = mfbReduceRop(pGC->alu, pGC->fgPixel);
    pPriv->fExpose = TRUE;
    pPriv->pRotatedPixmap = NullPixmap;
    pPriv->freeCompClip = FALSE;
    pPriv->FillArea = mfbSolidInvertArea;
    return TRUE;
}

/*ARGSUSED*/
void
mfbChangeGC(pGC, mask)
    GC	    *pGC;
    BITS32  mask;
{
    return;
}

/*ARGSUSED*/
void
mfbCopyGC (pGCSrc, changes, pGCDst)
    GCPtr	pGCSrc;
    Mask 	changes;
    GCPtr	pGCDst;
{
    return;
}

void
mfbDestroyGC(pGC)
    GC 			*pGC;
{
    mfbPrivGC *pPriv;

    pPriv = (mfbPrivGC *)(pGC->devPrivates[mfbGCPrivateIndex].ptr);
    if (pPriv->pRotatedPixmap)
	mfbDestroyPixmap(pPriv->pRotatedPixmap);
    if (pPriv->freeCompClip)
	(*pGC->pScreen->RegionDestroy)(pPriv->pCompositeClip);
    mfbDestroyOps (pGC->ops);
}

/*
 * create a private op array for a gc
 */

static GCOps *
mfbCreateOps (prototype)
    GCOps	*prototype;
{
    GCOps	*ret;
    extern Bool	Must_have_memory;

    /* XXX */ Must_have_memory = TRUE;
    ret = (GCOps *) xalloc (sizeof *ret);
    /* XXX */ Must_have_memory = FALSE;
    if (!ret)
	return 0;
    *ret = *prototype;
    ret->devPrivate.val = 1;
    return ret;
}

static void
mfbDestroyOps (ops)
    GCOps   *ops;
{
    if (ops->devPrivate.val)
	xfree (ops);
}

/* Clipping conventions
	if the drawable is a window
	    CT_REGION ==> pCompositeClip really is the composite
	    CT_other ==> pCompositeClip is the window clip region
	if the drawable is a pixmap
	    CT_REGION ==> pCompositeClip is the translated client region
		clipped to the pixmap boundary
	    CT_other ==> pCompositeClip is the pixmap bounding box
*/

/*ARGSUSED*/
void
mfbValidateGC(pGC, changes, pDrawable)
    register GCPtr 	pGC;
    Mask 		changes;
    DrawablePtr 	pDrawable;
{
    register mfbPrivGCPtr	devPriv;
    WindowPtr pWin;
    int mask;			/* stateChanges */
    int index;			/* used for stepping through bitfields */
    int	xrot, yrot;		/* rotations for tile and stipple pattern */
    int rrop;			/* reduced rasterop */
				/* flags for changing the proc vector 
				   and updating things in devPriv
				*/
    int new_rotate, new_rrop,  new_line, new_text, new_fill;
    DDXPointRec	oldOrg;		/* origin of thing GC was last used with */

    oldOrg = pGC->lastWinOrg;

    pGC->lastWinOrg.x = pDrawable->x;
    pGC->lastWinOrg.y = pDrawable->y;
    if (pDrawable->type == DRAWABLE_WINDOW)
	pWin = (WindowPtr)pDrawable;
    else
	pWin = (WindowPtr)NULL;

    /* we need to re-rotate the tile if the previous window/pixmap
       origin (oldOrg) differs from the new window/pixmap origin
       (pGC->lastWinOrg)
    */
    new_rotate = (oldOrg.x != pGC->lastWinOrg.x) ||
		 (oldOrg.y != pGC->lastWinOrg.y);

    devPriv = ((mfbPrivGCPtr) (pGC->devPrivates[mfbGCPrivateIndex].ptr));

    /*
	if the client clip is different or moved OR
	the subwindowMode has changed OR
	the window's clip has changed since the last validation
	we need to recompute the composite clip
    */
    if ((changes & (GCClipXOrigin|GCClipYOrigin|GCClipMask|GCSubwindowMode)) ||
	(pDrawable->serialNumber != (pGC->serialNumber & DRAWABLE_SERIAL_BITS))
       )
    {
	ScreenPtr pScreen = pGC->pScreen;

	if (pWin)
	{
	    Bool freeTmpClip, freeCompClip;
	    RegionPtr pregWin;		/* clip for this window, without
					   client clip */

	    if (pGC->subWindowMode == IncludeInferiors)
	    {
	        pregWin = NotClippedByChildren(pWin);
		freeTmpClip = TRUE;
	    }
	    else
	    {
	        pregWin = &pWin->clipList;
		freeTmpClip = FALSE;
	    }
	    freeCompClip = devPriv->freeCompClip;

	    /* if there is no client clip, we can get by with
	       just keeping the pointer we got, and remembering
	       whether or not should destroy (or maybe re-use)
	       it later.  this way, we avoid unnecessary copying
	       of regions.  (this wins especially if many clients clip
	       by children and have no client clip.)
	    */
	    if (pGC->clientClipType == CT_NONE)
	    {
	        if(freeCompClip) 
		    (*pScreen->RegionDestroy) (devPriv->pCompositeClip);
	        devPriv->pCompositeClip = pregWin;
	        devPriv->freeCompClip = freeTmpClip;
	    }
	    else
	    {
		/* we need one 'real' region to put into the composite
		   clip.
			if pregWin and the current composite clip 
		   are real, we can get rid of one.
			if the current composite clip is real and
		   pregWin isn't, intersect the client clip and
		   pregWin into the existing composite clip.
			if pregWin is real and the current composite
		   clip isn't, intersect pregWin with the client clip
		   and replace the composite clip with it.
			if neither is real, create a new region and
		   do the intersection into it.
		*/

		(*pScreen->TranslateRegion)(pGC->clientClip,
					    pDrawable->x + pGC->clipOrg.x,
					    pDrawable->y + pGC->clipOrg.y);
						  
		if (freeCompClip)
		{
		    (*pScreen->Intersect)(devPriv->pCompositeClip,
					  pregWin, pGC->clientClip);
		    if (freeTmpClip)
			(*pScreen->RegionDestroy)(pregWin);
		}
		else if (freeTmpClip)
		{
		    (*pScreen->Intersect)(pregWin, pregWin, pGC->clientClip);
		    devPriv->pCompositeClip = pregWin;
		}
		else
		{
		    devPriv->pCompositeClip = (*pScreen->RegionCreate)(NullBox,
								       0);
		    (*pScreen->Intersect)(devPriv->pCompositeClip,
					  pregWin, pGC->clientClip);
		}
		devPriv->freeCompClip = TRUE;
		(*pScreen->TranslateRegion)(pGC->clientClip,
					    -(pDrawable->x + pGC->clipOrg.x),
					    -(pDrawable->y + pGC->clipOrg.y));
						  
	    }
	} /* end of composite clip for a window */
	else
	{
	    BoxRec pixbounds;

	    /* XXX should we translate by drawable.x/y here ? */
	    pixbounds.x1 = 0;
	    pixbounds.y1 = 0;
	    pixbounds.x2 = pDrawable->width;
	    pixbounds.y2 = pDrawable->height;

	    if (devPriv->freeCompClip)
	        (*pScreen->RegionReset)(devPriv->pCompositeClip, &pixbounds);
	    else
	    {
		devPriv->freeCompClip = TRUE;
		devPriv->pCompositeClip = (*pScreen->RegionCreate)(&pixbounds,
								   1);
	    }

	    if (pGC->clientClipType == CT_REGION)
	    {
		(*pScreen->TranslateRegion)(devPriv->pCompositeClip,
					    -pGC->clipOrg.x, -pGC->clipOrg.y);
		(*pScreen->Intersect)(devPriv->pCompositeClip,
				      devPriv->pCompositeClip,
				      pGC->clientClip);
		(*pScreen->TranslateRegion)(devPriv->pCompositeClip,
					    pGC->clipOrg.x, pGC->clipOrg.y);
	    }
	} /* end of composite clip for pixmap */
    }

    new_rrop = FALSE;
    new_line = FALSE;
    new_text = FALSE;