cfbtileodd.c

远程桌面连接工具

/*
 * Fill odd tiled rectangles and spans.
 * no depth dependencies.
 */

/*

Copyright (c) 1989  X Consortium

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of the X Consortium shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from the X Consortium.
*/

/* $XConsortium: cfbtileodd.c,v 1.16 94/04/17 20:29:06 dpw Exp $ */
/* $XFree86: xc/programs/Xserver/cfb/cfbtileodd.c,v 3.0 1996/06/29 09:05:55 dawes Exp $ */

#include "X.h"
#include "Xmd.h"
#include "servermd.h"
#include "gcstruct.h"
#include "window.h"
#include "pixmapstr.h"
#include "scrnintstr.h"
#include "windowstr.h"

#include "cfb.h"
#include "cfbmskbits.h"
#include "cfb8bit.h"

#include "mergerop.h"

#if PSZ == 24
#if PGSZ == 32
#define LEFTSHIFT_AMT (3)
#else /* PGSZ == 64 */
#define LEFTSHIFT_AMT (4 - PWSH)
#endif /* PGSZ */
#else /* PSZ != 24 */
#if PGSZ == 32
#define LEFTSHIFT_AMT (5 - PWSH)
#else /* PGSZ == 64 */
#define LEFTSHIFT_AMT (6 - PWSH)
#endif /* PGSZ */
#endif /* PSZ == 24*/

#define LastTileBits {\
    tmp = bits; \
    if (tileEndPart) \
	bits = (*pSrc & tileEndMask) | BitRight (*pSrcLine, tileEndLeftShift); \
    else \
	bits = *pSrc; \
}

#if PSZ == 24
#define ResetTileBits {\
    pSrc = pSrcLine; \
    nlwSrc = widthSrc;\
    if (tileEndPart) { \
	if (4 - xoff + tileEndPart <= 4) {\
	    bits = *pSrc++; \
	    nlwSrc--; \
	} else \
	    bits = BitLeft(tmp, tileEndLeftShift) | \
		   BitRight(bits, tileEndRightShift); \
	xoff = (xoff + xoffStep) & 3; \
	leftShift = xoff << LEFTSHIFT_AMT; \
	rightShift = PGSZ - leftShift; \
    }\
}
#else
#define ResetTileBits {\
    pSrc = pSrcLine; \
    nlwSrc = widthSrc;\
    if (tileEndPart) { \
	if (PPW - xoff + tileEndPart <= PPW) {\
	    bits = *pSrc++; \
	    nlwSrc--; \
	} else \
	    bits = BitLeft(tmp, tileEndLeftShift) | \
		   BitRight(bits, tileEndRightShift); \
	xoff = (xoff + xoffStep) & PIM; \
	leftShift = xoff << LEFTSHIFT_AMT; \
	rightShift = PGSZ - leftShift; \
    }\
}
#endif

#define NextTileBits {\
    if (nlwSrc == 1) {\
	LastTileBits\
    } else { \
    	if (nlwSrc == 0) {\
	    ResetTileBits\
    	} \
	if (nlwSrc == 1) {\
	    LastTileBits\
	} else {\
	    tmp = bits; \
	    bits = *pSrc++; \
	}\
    }\
    nlwSrc--; \
}

void
MROP_NAME(cfbFillBoxTileOdd) (pDrawable, nBox, pBox, tile, xrot, yrot, alu, planemask)
    DrawablePtr	    pDrawable;
    int		    nBox;	/* number of boxes to fill */
    register BoxPtr pBox;	/* pointer to list of boxes to fill */
    PixmapPtr	    tile;	/* tile */
    int		    xrot, yrot;
    int		    alu;
    unsigned long   planemask;
{
    int tileWidth;	/* width of tile in pixels */
    int tileHeight;	/* height of the tile */
    int widthSrc;

    int widthDst;	/* width in longwords of the dest pixmap */
    int w;		/* width of current box */
    int h;		/* height of current box */
    unsigned long startmask;
    unsigned long endmask;/* masks for reggedy bits at either end of line */
    int nlwMiddle;	/* number of longwords between sides of boxes */
    int nlwSrc;		/* number of whole longwords in source */
    
    register int nlw;	/* loop version of nlwMiddle */
    int srcy;		/* current tile y position */
    int srcx;		/* current tile x position */
    int xoffDst, xoffSrc;
    int leftShift, rightShift;

    MROP_DECLARE_REG()

    unsigned long *pDstBase;	/* pointer to start of dest */
    unsigned long *pDstLine;	/* poitner to start of dest box */
    unsigned long *pSrcBase;	/* pointer to start of source */
    unsigned long *pSrcLine;	/* pointer to start of source line */
    register unsigned long *pDst;
    register unsigned long *pSrc;
    register unsigned long bits, tmp;
    register int	   nlwPart;
    int xoffStart, xoff;
    int leftShiftStart, rightShiftStart, nlwSrcStart;
    unsigned long tileEndMask;
    int tileEndLeftShift, tileEndRightShift;
    int	xoffStep;
    int tileEndPart;
    int needFirst;
    unsigned long   narrow[2];
    unsigned long   narrowMask;
    int	    narrowShift;
    Bool    narrowTile;

    MROP_INITIALIZE (alu, planemask)

    tileHeight = tile->drawable.height;
    tileWidth = tile->drawable.width;
    widthSrc = tile->devKind / PGSZB;
    narrowTile = FALSE;
    if (widthSrc == 1)
    {
	narrowShift = tileWidth;
	narrowMask = cfbendpartial [tileWidth];
	tileWidth *= 2;
	widthSrc = 2;
	narrowTile = TRUE;
    }
    pSrcBase = (unsigned long *)tile->devPrivate.ptr;

    cfbGetLongWidthAndPointer (pDrawable, widthDst, pDstBase)

#if PSZ == 24
    tileEndPart = (4 - tileWidth) & 3;
    tileEndMask = cfbendpartial[tileWidth & 3];
#else
    tileEndPart = tileWidth & PIM;
    tileEndMask = cfbendpartial[tileEndPart];
#endif /* PSZ == 24 */
    tileEndLeftShift = (tileEndPart) << LEFTSHIFT_AMT;
    tileEndRightShift = PGSZ - tileEndLeftShift;
#if PSZ == 24
    xoffStep = 4 - tileEndPart;
#else
    xoffStep = PPW - tileEndPart;
#endif /* PSZ == 24 */
    /*
     * current assumptions: tile > 32 bits wide.
     */
    while (nBox--)
    {
	w = pBox->x2 - pBox->x1;
	h = pBox->y2 - pBox->y1;
	modulus (pBox->x1 - xrot, tileWidth, srcx);
	modulus (pBox->y1 - yrot, tileHeight, srcy);
#if PSZ == 24
	xoffDst = (4 - pBox->x1) & 3;
	if (w == 1  &&  (xoffDst == 0  ||  xoffDst == 1))
#else
	xoffDst = pBox->x1 & PIM;
	if (xoffDst + w < PPW)
#endif
	{
	    maskpartialbits(pBox->x1, w, startmask);
	    endmask = 0;
	    nlwMiddle = 0;
	}
	else
	{
	    maskbits (pBox->x1, w, startmask, endmask, nlwMiddle)
	}
#if PSZ == 24
	pDstLine = pDstBase + (pBox->y1 * widthDst) + ((pBox->x1*3) >> 2);
#else
	pDstLine = pDstBase + (pBox->y1 * widthDst) + (pBox->x1 >> PWSH);
#endif
	pSrcLine = pSrcBase + (srcy * widthSrc);
#if PSZ == 24
	xoffSrc = (4 - srcx) & 3;
#else
	xoffSrc = srcx & PIM;
#endif
	if (xoffSrc >= xoffDst)
	{
	    xoffStart = xoffSrc - xoffDst;
	    needFirst = 1;
	}
	else
	{
#if PSZ == 24
	    xoffStart = 4 - (xoffDst - xoffSrc);
#else
	    xoffStart = PPW - (xoffDst - xoffSrc);
#endif
	    needFirst = 0;
	}
	leftShiftStart = (xoffStart) << LEFTSHIFT_AMT;
	rightShiftStart = PGSZ - leftShiftStart;
#if PSZ == 24
	nlwSrcStart = widthSrc - ((srcx*3) >> 2);
#else
	nlwSrcStart = widthSrc - (srcx >> PWSH);
#endif
	while (h--)
	{
	    /* XXX only works when narrowShift >= PPW/2 */
	    if (narrowTile)
	    {
		tmp = pSrcBase[srcy] & narrowMask; /* source width == 1 */
		narrow[0] = tmp | SCRRIGHT (tmp, narrowShift);
#if PSZ == 24
		narrow[1] = BitLeft (tmp, 8) |
			    BitRight(tmp, 16);
#else
		narrow[1] = SCRLEFT (tmp, PPW - narrowShift) |
			    SCRRIGHT(tmp, 2 * narrowShift - PPW);
#endif
		pSrcLine = narrow;
	    }
	    xoff = xoffStart;
	    leftShift = leftShiftStart;
	    rightShift = rightShiftStart;
	    nlwSrc = nlwSrcStart;
#if PSZ == 24
	    pSrc = pSrcLine + ((srcx * 3) >> 2);
#else
	    pSrc = pSrcLine + (srcx >> PWSH);
#endif
	    pDst = pDstLine;
	    bits = 0;
	    if (needFirst)
	    {
		NextTileBits
	    }
	    if (startmask)
	    {
		NextTileBits
		tmp = BitLeft(tmp, leftShift);
 		if (rightShift != PGSZ)
		    tmp |= BitRight(bits,rightShift);
		*pDst = MROP_MASK (tmp, *pDst, startmask);
		++pDst;
	    }
	    nlw = nlwMiddle;
	    while (nlw)
	    {
#if MROP == Mcopy
		if (nlwSrc > 1)
		{
		    nlwPart = nlw;
		    if (nlwPart >= nlwSrc)
			nlwPart = nlwSrc - 1;
		    nlw -= nlwPart;
		    nlwSrc -= nlwPart;
		    if (rightShift != PGSZ)
		    {
			while (nlwPart--)
			{
			    tmp = bits;
			    bits = *pSrc++;
			    *pDst = MROP_SOLID(BitLeft(tmp, leftShift) |
					      BitRight (bits, rightShift),
					      *pDst);
			    ++pDst;
			}
		    }
		    else
		    {
			if (nlwPart)
			{
			    *pDst = MROP_SOLID (bits, *pDst);
			    ++pDst;
			    nlwPart--;
			    while (nlwPart--)
			    {
				*pDst = MROP_SOLID(*pSrc, *pDst);
				++pDst; ++pSrc;
			    }
			    bits = *pSrc++;
			}
		    }
		}
		else
#endif
		{
		    NextTileBits
		    if (rightShift != PGSZ)
		    {
			*pDst = MROP_SOLID(BitLeft(tmp, leftShift) |
					   BitRight(bits, rightShift),
					   *pDst);
		    }
		    else
		    {
			*pDst = MROP_SOLID (tmp, *pDst);
		    }
		    ++pDst;
		    nlw--;
		}
	    }
	    if (endmask)
	    {
		NextTileBits
		if (rightShift == PGSZ)
		    bits = 0;
		*pDst = MROP_MASK (BitLeft(tmp, leftShift) |
				   BitRight(bits,rightShift),
				   *pDst, endmask);
	    }
	    pDstLine += widthDst;
	    pSrcLine += widthSrc;
	    if (++srcy == tileHeight)
	    {
		srcy = 0;
		pSrcLine = pSrcBase;
	    }
	}
	pBox++;
    }
}

void
MROP_NAME(cfbFillSpanTileOdd) (pDrawable, n, ppt, pwidth, tile, xrot, yrot, alu, planemask)
    DrawablePtr	pDrawable;
    int		n;
    DDXPointPtr	ppt;
    int		*pwidth;
    PixmapPtr	tile;
    int		xrot, yrot;
    int		alu;
    unsigned long   planemask;
{
    int tileWidth;	/* width of tile in pixels */
    int tileHeight;	/* height of the tile */
    int widthSrc;

    int widthDst;		/* width in longwords of the dest pixmap */
    int w;		/* width of current span */
    unsigned long startmask;
    unsigned long endmask;	/* masks for reggedy bits at either end of line */
    int nlwSrc;		/* number of whole longwords in source */
    
    register int nlw;	/* loop version of nlwMiddle */
    int srcy;		/* current tile y position */
    int srcx;		/* current tile x position */
    int xoffDst, xoffSrc;
    int leftShift, rightShift;

    MROP_DECLARE_REG()

    unsigned long *pDstBase;	/* pointer to start of dest */
    unsigned long *pDstLine;	/* poitner to start of dest box */
    unsigned long *pSrcBase;	/* pointer to start of source */
    unsigned long *pSrcLine;	/* pointer to start of source line */
    register unsigned long *pDst;
    register unsigned long *pSrc;
    register unsigned long bits, tmp;
    register int	   nlwPart;
    int xoffStart, xoff;
    int leftShiftStart, rightShiftStart, nlwSrcStart;
    unsigned long tileEndMask;
    int tileEndLeftShift, tileEndRightShift;
    int	xoffStep;
    int tileEndPart;
    int needFirst;
    unsigned long   narrow[2];
    unsigned long   narrowMask;
    int	    narrowShift;
    Bool    narrowTile;

    MROP_INITIALIZE (alu, planemask)

    tileHeight = tile->drawable.height;
    tileWidth = tile->drawable.width;
    widthSrc = tile->devKind / PGSZB;
    narrowTile = FALSE;
    if (widthSrc == 1)
    {
	narrowShift = tileWidth;
	narrowMask = cfbendpartial [tileWidth];
	tileWidth *= 2;
	widthSrc = 2;
	narrowTile = TRUE;
    }
    pSrcBase = (unsigned long *)tile->devPrivate.ptr;

    cfbGetLongWidthAndPointer (pDrawable, widthDst, pDstBase)

#if PSZ == 24
    tileEndPart = (4 - tileWidth) & 3;
    tileEndMask = cfbendpartial[tileWidth & 3];
#else
    tileEndPart = tileWidth & PIM;
    tileEndMask = cfbendpartial[tileEndPart];
#endif
    tileEndLeftShift = (tileEndPart) << LEFTSHIFT_AMT;
    tileEndRightShift = PGSZ - tileEndLeftShift;
#if PSZ == 24
    xoffStep = 4 - tileEndPart;
#else
    xoffStep = PPW - tileEndPart;
#endif
    while (n--)
    {
	w = *pwidth++;
	modulus (ppt->x - xrot, tileWidth, srcx);
	modulus (ppt->y - yrot, tileHeight, srcy);
#if PSZ == 24
	xoffDst = (4 - ppt->x) & 3;
	if (w == 1  &&  (xoffDst == 0  ||  xoffDst == 1))
#else
	xoffDst = ppt->x & PIM;
	if (xoffDst + w < PPW)
#endif
	{
	    maskpartialbits(ppt->x, w, startmask);
	    endmask = 0;
	    nlw = 0;
	}
	else
	{
	    maskbits (ppt->x, w, startmask, endmask, nlw)
	}
#if PSZ == 24
	pDstLine = pDstBase + (ppt->y * widthDst)  + ((ppt->x *3)>> 2);
#else
	pDstLine = pDstBase + (ppt->y * widthDst) + (ppt->x >> PWSH);
#endif
	pSrcLine = pSrcBase + (srcy * widthSrc);
#if PSZ == 24
	xoffSrc = (4 - srcx) & 3;
#else
	xoffSrc = srcx & PIM;
#endif
	if (xoffSrc >= xoffDst)
	{
	    xoffStart = xoffSrc - xoffDst;
	    needFirst = 1;
	}
	else
	{
#if PSZ == 24
	    xoffStart = 4 - (xoffDst - xoffSrc);
#else
	    xoffStart = PPW - (xoffDst - xoffSrc);
#endif
	    needFirst = 0;
	}
	leftShiftStart = (xoffStart) << LEFTSHIFT_AMT;
	rightShiftStart = PGSZ - leftShiftStart;
#if PSZ == 24
	nlwSrcStart = widthSrc - ((srcx*3) >> 2);
#else
	nlwSrcStart = widthSrc - (srcx >> PWSH);
#endif
	/* XXX only works when narrowShift >= PPW/2 */
	if (narrowTile)
	{
	    tmp = pSrcBase[srcy] & narrowMask;	/* source width == 1 */
	    narrow[0] = tmp | SCRRIGHT (tmp, narrowShift);
#if PSZ == 24
	    narrow[1] = BitLeft (tmp, 8) |
			BitRight(tmp, 16);
#else
	    narrow[1] = SCRLEFT (tmp, PPW - narrowShift) |
			SCRRIGHT(tmp, 2 * narrowShift - PPW);
#endif
	    pSrcLine = narrow;
	}
	xoff = xoffStart;
	leftShift = leftShiftStart;
	rightShift = rightShiftStart;
	nlwSrc = nlwSrcStart;
#if PSZ == 24
	pSrc = pSrcLine + ((srcx * 3) >> 2);
#else
	pSrc = pSrcLine + (srcx >> PWSH);
#endif
	pDst = pDstLine;
	bits = 0;
	if (needFirst)
	{
	    NextTileBits
	}
	if (startmask)
	{
	    NextTileBits
	    tmp = BitLeft(tmp, leftShift);
	    if (rightShift != PGSZ)
		tmp |= BitRight(bits,rightShift);
	    *pDst = MROP_MASK (tmp, *pDst, startmask);
	    ++pDst;
	}
	while (nlw)
	{
#if MROP == Mcopy
	    if (nlwSrc > 1)
	    {
		nlwPart = nlw;
		if (nlwPart >= nlwSrc)
		    nlwPart = nlwSrc - 1;
		nlw -= nlwPart;
		nlwSrc -= nlwPart;
		if (rightShift != PGSZ)
		{
		    while (nlwPart--)
		    {
			tmp = bits;
			bits = *pSrc++;
			*pDst = MROP_SOLID(BitLeft(tmp, leftShift) |
					  BitRight (bits, rightShift),
					  *pDst);
			++pDst;
		    }
		}
		else
		{
		    if (nlwPart)
		    {
			*pDst = MROP_SOLID (bits, *pDst);
			++pDst;
			nlwPart--;
			while (nlwPart--)
			{
			    *pDst = MROP_SOLID(*pSrc, *pDst);
			    ++pDst; ++pSrc;
			}
			bits = *pSrc++;
		    }
		}
	    }
	    else
#endif
	    {
		NextTileBits
		if (rightShift != PGSZ)
		{
		    *pDst = MROP_SOLID(BitLeft(tmp, leftShift) |
				       BitRight(bits, rightShift),
				       *pDst);
		    ++pDst;
		}
		else
		{
		    *pDst = MROP_SOLID (tmp, *pDst);
		    ++pDst;
		}
		nlw--;
	    }
	}
	if (endmask)
	{
	    NextTileBits