mfbgc.c

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	    break;
	  case GCFillStyle:
	    new_fill = TRUE;
	    break;
	  case GCFillRule:
	    break;
	  case GCTile:
	    if(pGC->tileIsPixel)
		break;
	    new_rotate = TRUE;
	    new_fill = TRUE;
	    break;

	  case GCStipple:
	    if(pGC->stipple == (PixmapPtr)NULL)
		break;
	    new_rotate = TRUE;
	    new_fill = TRUE;
	    break;

	  case GCTileStipXOrigin:
	    new_rotate = TRUE;
	    break;

	  case GCTileStipYOrigin:
	    new_rotate = TRUE;
	    break;

	  case GCFont:
	    new_text = TRUE;
	    break;
	  case GCSubwindowMode:
	    break;
	  case GCGraphicsExposures:
	    break;
	  case GCClipXOrigin:
	    break;
	  case GCClipYOrigin:
	    break;
	  case GCClipMask:
	    break;
	  case GCDashOffset:
	    break;
	  case GCDashList:
	    break;
	  case GCArcMode:
	    break;
	  default:
	    break;
	}
    }

    /* deal with the changes we've collected .
       new_rrop must be done first because subsequent things
       depend on it.
    */

    if(new_rotate || new_fill)
    {
	Bool new_pix = FALSE;

	/* figure out how much to rotate */
	xrot = pGC->patOrg.x;
	yrot = pGC->patOrg.y;
	xrot += pDrawable->x;
	yrot += pDrawable->y;

	switch (pGC->fillStyle)
	{
	case FillTiled:
	    /* copy current tile and stipple */
	    if (!pGC->tileIsPixel && (pGC->tile.pixmap->drawable.width <= PPW) &&
		!(pGC->tile.pixmap->drawable.width & (pGC->tile.pixmap->drawable.width - 1)))
	    {
		mfbCopyRotatePixmap(pGC->tile.pixmap,
				    &devPriv->pRotatedPixmap, xrot, yrot);
		new_pix = TRUE;
	    }
	    break;
	case FillStippled:
	case FillOpaqueStippled:
	    if (pGC->stipple && (pGC->stipple->drawable.width <= PPW) &&
	    	!(pGC->stipple->drawable.width & (pGC->stipple->drawable.width - 1)))
	    {
		mfbCopyRotatePixmap(pGC->stipple,
				    &devPriv->pRotatedPixmap, xrot, yrot);
		new_pix = TRUE;
	    }
	}
	/* destroy any previously rotated tile or stipple */
	if (!new_pix && devPriv->pRotatedPixmap)
	{
	    (*pDrawable->pScreen->DestroyPixmap)(devPriv->pRotatedPixmap);
	    devPriv->pRotatedPixmap = (PixmapPtr)NULL;
	}
    }

    /*
     * duck out here when the GC is unchanged
     */

    if (!changes)
	return;

    if (new_rrop || new_fill)
    {
	rrop = mfbReduceRop(pGC->alu, pGC->fgPixel);
	devPriv->rop = rrop;
	new_fill = TRUE;
	/* FillArea raster op is GC's for tile filling,
	   and the reduced rop for solid and stipple
	*/
	if (pGC->fillStyle == FillTiled)
	    devPriv->ropFillArea = pGC->alu;
	else
	    devPriv->ropFillArea = rrop;

	/* opaque stipples:
	   fg	bg	ropOpStip	fill style
	   1	0	alu		tile
	   0	1	inverseAlu	tile
	   1	1	rrop(fg, alu)	solid
	   0	0	rrop(fg, alu)	solid
	Note that rrop(fg, alu) == mfbPrivGC.rop, so we don't really need to
	compute it.
	*/
        if (pGC->fillStyle == FillOpaqueStippled)
        {
	    if ((pGC->fgPixel & 1) != (pGC->bgPixel & 1))
	    {
	        if (pGC->fgPixel & 1)
		    devPriv->ropOpStip = pGC->alu;
	        else
		    devPriv->ropOpStip = InverseAlu[pGC->alu];
	    }
	    else
	        devPriv->ropOpStip = rrop;
	    devPriv->ropFillArea = devPriv->ropOpStip;
        }
    }
    else
	rrop = devPriv->rop;

    if (new_line || new_fill || new_text)
    {
	GCOps	*newops;

	if (newops = matchCommon (pGC))
 	{
	    if (pGC->ops->devPrivate.val)
		miDestroyGCOps (pGC->ops);
	    pGC->ops = newops;
	    new_line = new_fill = new_text = 0;
	}
 	else
 	{
	    if (!pGC->ops->devPrivate.val)
 	    {
		pGC->ops = miCreateGCOps (pGC->ops);
		pGC->ops->devPrivate.val = 1;
	    }
	}
    }

    if (new_line || new_fill)
    {
	if (pGC->lineWidth == 0)
	{
	    if ((pGC->lineStyle == LineSolid) && (pGC->fillStyle == FillSolid)
		&& ((rrop == RROP_WHITE) || (rrop == RROP_BLACK)))
		pGC->ops->PolyArc = mfbZeroPolyArcSS;
	    else
		pGC->ops->PolyArc = miZeroPolyArc;
	}
	else
	    pGC->ops->PolyArc = miPolyArc;
	if (pGC->lineStyle == LineSolid)
	{
	    if(pGC->lineWidth == 0)
	    {
	        if (pGC->fillStyle == FillSolid)
		{
		    pGC->ops->PolySegment = mfbSegmentSS;
		    pGC->ops->Polylines = mfbLineSS;
	        }
 		else
		{
		    pGC->ops->PolySegment = miPolySegment;
		    pGC->ops->Polylines = miZeroLine;
		}
	    }
	    else
	    {
		pGC->ops->PolySegment = miPolySegment;
		pGC->ops->Polylines = miWideLine;
	    }
	}
	else
	{
	    if(pGC->lineWidth == 0 && pGC->fillStyle == FillSolid)
	    {
	        pGC->ops->Polylines = mfbLineSD;
		pGC->ops->PolySegment = mfbSegmentSD;
	    }
	    else
	    {
	        pGC->ops->Polylines = miWideDash;
		pGC->ops->PolySegment = miPolySegment;
	    }
	}
    }

    if (new_text || new_fill)
    {
	if ((pGC->font) &&
	    (FONTMAXBOUNDS(pGC->font,rightSideBearing) -
	     FONTMINBOUNDS(pGC->font,leftSideBearing) > 32 ||
	     FONTMINBOUNDS(pGC->font,characterWidth) < 0))
	{
	    pGC->ops->PolyGlyphBlt = miPolyGlyphBlt;
	    pGC->ops->ImageGlyphBlt = miImageGlyphBlt;
	}
	else
	{
	    /* special case ImageGlyphBlt for terminal emulator fonts */
	    if ((pGC->font) &&
		TERMINALFONT(pGC->font) &&
		((pGC->fgPixel & 1) != (pGC->bgPixel & 1)))
	    {
		/* pcc bug makes this not compile...
		pGC->ops->ImageGlyphBlt = (pGC->fgPixel & 1) ? mfbTEGlyphBltWhite :
						      mfbTEGlyphBltBlack;
		*/
		if (pGC->fgPixel & 1)
		    pGC->ops->ImageGlyphBlt = mfbTEGlyphBltWhite;
		else
		    pGC->ops->ImageGlyphBlt = mfbTEGlyphBltBlack;
	    }
	    else
	    {
	        if (pGC->fgPixel & 1)
		    pGC->ops->ImageGlyphBlt = mfbImageGlyphBltWhite;
	        else
		    pGC->ops->ImageGlyphBlt = mfbImageGlyphBltBlack;
	    }

	    /* now do PolyGlyphBlt */
	    if (pGC->fillStyle == FillSolid ||
		(pGC->fillStyle == FillOpaqueStippled &&
		 (pGC->fgPixel & 1) == (pGC->bgPixel & 1)
		)
	       )
	    {
		if (rrop == RROP_WHITE)
		    pGC->ops->PolyGlyphBlt = mfbPolyGlyphBltWhite;
		else if (rrop == RROP_BLACK)
		    pGC->ops->PolyGlyphBlt = mfbPolyGlyphBltBlack;
		else if (rrop == RROP_INVERT)
		    pGC->ops->PolyGlyphBlt = mfbPolyGlyphBltInvert;
		else
		    pGC->ops->PolyGlyphBlt = (void (*)())NoopDDA;
	    }
	    else
	    {
		pGC->ops->PolyGlyphBlt = miPolyGlyphBlt;
	    }
	}
    }

    if (new_fill)
    {
	/* install a suitable fillspans and pushpixels */
	pGC->ops->PushPixels = mfbPushPixels;
	pGC->ops->FillPolygon = miFillPolygon;
	if ((pGC->fillStyle == FillSolid) ||
	    ((pGC->fillStyle == FillOpaqueStippled) &&
	     ((pGC->fgPixel & 1) == (pGC->bgPixel & 1))))
	{
	    pGC->ops->PushPixels = mfbSolidPP;
	    switch(devPriv->rop)
	    {
	      case RROP_WHITE:
		pGC->ops->FillSpans = mfbWhiteSolidFS;
		pGC->ops->FillPolygon = mfbFillPolyWhite;
		break;
	      case RROP_BLACK:
		pGC->ops->FillSpans = mfbBlackSolidFS;
		pGC->ops->FillPolygon = mfbFillPolyBlack;
		break;
	      case RROP_INVERT:
		pGC->ops->FillSpans = mfbInvertSolidFS;
		pGC->ops->FillPolygon = mfbFillPolyInvert;
		break;
	      case RROP_NOP:
		pGC->ops->FillSpans = (void (*)())NoopDDA;
		pGC->ops->FillPolygon = (void (*)())NoopDDA;
		break;
	    }
	}
	/* beyond this point, opaqueStippled ==> fg != bg */
	else if (((pGC->fillStyle == FillTiled) ||
		  (pGC->fillStyle == FillOpaqueStippled)) &&
		 !devPriv->pRotatedPixmap)
	{
	    pGC->ops->FillSpans = mfbUnnaturalTileFS;
	}
	else if ((pGC->fillStyle == FillStippled) && !devPriv->pRotatedPixmap)
	{
	    pGC->ops->FillSpans = mfbUnnaturalStippleFS;
	}
	else if (pGC->fillStyle == FillStippled)
	{
	    switch(devPriv->rop)
	    {
	      case RROP_WHITE:
		pGC->ops->FillSpans = mfbWhiteStippleFS;
		break;
	      case RROP_BLACK:
		pGC->ops->FillSpans = mfbBlackStippleFS;
		break;
	      case RROP_INVERT:
		pGC->ops->FillSpans = mfbInvertStippleFS;
		break;
	      case RROP_NOP:
		pGC->ops->FillSpans = (void (*)())NoopDDA;
		break;
	    }
	}
	else /* overload tiles to do parti-colored opaque stipples */
	{
	    pGC->ops->FillSpans = mfbTileFS;
	}
	if (pGC->fillStyle == FillSolid)
	    pGC->ops->PolyFillArc = mfbPolyFillArcSolid;
	else
	    pGC->ops->PolyFillArc = miPolyFillArc;
	/* the rectangle code doesn't deal with opaque stipples that
	   are two colors -- we can fool it for fg==bg, though
	 */
	if ((((pGC->fillStyle == FillTiled) ||
	      (pGC->fillStyle == FillStippled)) &&
	     !devPriv->pRotatedPixmap) ||
	    ((pGC->fillStyle == FillOpaqueStippled) &&
	     ((pGC->fgPixel & 1) != (pGC->bgPixel & 1)))
	   )
	{
	    pGC->ops->PolyFillRect = miPolyFillRect;
	}
	else /* deal with solids and natural stipples and tiles */
	{
	    pGC->ops->PolyFillRect = mfbPolyFillRect;

	    if ((pGC->fillStyle == FillSolid) ||
		((pGC->fillStyle == FillOpaqueStippled) &&
		 ((pGC->fgPixel & 1) == (pGC->bgPixel & 1))))
	    {
		switch(devPriv->rop)
		{
		  case RROP_WHITE:
		    devPriv->FillArea = mfbSolidWhiteArea;
		    break;
		  case RROP_BLACK:
		    devPriv->FillArea = mfbSolidBlackArea;
		    break;
		  case RROP_INVERT:
		    devPriv->FillArea = mfbSolidInvertArea;
		    break;
		  case RROP_NOP:
		    devPriv->FillArea = (void (*)())NoopDDA;
		    break;
		}
	    }
	    else if (pGC->fillStyle == FillStippled)
	    {
		switch(devPriv->rop)
		{
		  case RROP_WHITE:
		    devPriv->FillArea = mfbStippleWhiteArea;
		    break;
		  case RROP_BLACK:
		    devPriv->FillArea = mfbStippleBlackArea;
		    break;
		  case RROP_INVERT:
		    devPriv->FillArea = mfbStippleInvertArea;
		    break;
		  case RROP_NOP:
		    devPriv->FillArea = (void (*)())NoopDDA;
		    break;
		}
	    }
	    else /* deal with tiles */
	    {
		switch (pGC->alu)
		{
		  case GXcopy:
		    devPriv->FillArea = mfbTileAreaPPWCopy;
		    break;
		  default:
		    devPriv->FillArea = mfbTileAreaPPWGeneral;
		    break;
		}
	    }
	} /* end of natural rectangles */
    } /* end of new_fill */
}

/* table to map alu(src, dst) to alu(~src, dst) */
int InverseAlu[16] = {
	GXclear,
	GXandInverted,
	GXnor,
	GXcopyInverted,
	GXand,
	GXnoop,
	GXequiv,
	GXorInverted,
	GXandReverse,
	GXxor,
	GXinvert,
	GXnand,
	GXcopy,
	GXor,
	GXorReverse,
	GXset
};

int
mfbReduceRop(alu, src)
    register int alu;
    register Pixel src;
{
    int rop;
    if ((src & 1) == 0)	/* src is black */
    {
	switch(alu)
	{
	  case GXclear:
	    rop = RROP_BLACK;
	    break;
	  case GXand:
	    rop = RROP_BLACK;
	    break;
	  case GXandReverse:
	    rop = RROP_BLACK;
	    break;
	  case GXcopy:
	    rop = RROP_BLACK;
	    break;
	  case GXandInverted:
	    rop = RROP_NOP;
	    break;
	  case GXnoop:
	    rop = RROP_NOP;
	    break;
	  case GXxor:
	    rop = RROP_NOP;
	    break;
	  case GXor:
	    rop = RROP_NOP;
	    break;
	  case GXnor:
	    rop = RROP_INVERT;
	    break;
	  case GXequiv:
	    rop = RROP_INVERT;
	    break;
	  case GXinvert:
	    rop = RROP_INVERT;
	    break;
	  case GXorReverse:
	    rop = RROP_INVERT;
	    break;
	  case GXcopyInverted:
	    rop = RROP_WHITE;
	    break;
	  case GXorInverted:
	    rop = RROP_WHITE;
	    break;
	  case GXnand:
	    rop = RROP_WHITE;
	    break;
	  case GXset:
	    rop = RROP_WHITE;
	    break;
	}
    }
    else /* src is white */
    {
	switch(alu)
	{
	  case GXclear:
	    rop = RROP_BLACK;
	    break;
	  case GXand:
	    rop = RROP_NOP;
	    break;
	  case GXandReverse:
	    rop = RROP_INVERT;
	    break;
	  case GXcopy:
	    rop = RROP_WHITE;
	    break;
	  case GXandInverted:
	    rop = RROP_BLACK;
	    break;
	  case GXnoop:
	    rop = RROP_NOP;
	    break;
	  case GXxor:
	    rop = RROP_INVERT;
	    break;
	  case GXor:
	    rop = RROP_WHITE;
	    break;
	  case GXnor:
	    rop = RROP_BLACK;
	    break;
	  case GXequiv:
	    rop = RROP_NOP;
	    break;
	  case GXinvert:
	    rop = RROP_INVERT;
	    break;
	  case GXorReverse:
	    rop = RROP_WHITE;
	    break;
	  case GXcopyInverted:
	    rop = RROP_BLACK;
	    break;
	  case GXorInverted:
	    rop = RROP_NOP;
	    break;
	  case GXnand:
	    rop = RROP_INVERT;
	    break;
	  case GXset:
	    rop = RROP_WHITE;
	    break;
	}
    }
    return rop;
}