cfbmskbits.h

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		break; \
	default: \
		dstpixel = BitLeft((*(pdst) &cfbmask[idx]), cfb24Shift[idx])| \
		BitRight(((*((pdst)+1)) &cfbmask[idx+1]), cfb24Shift[idx+1]); \
	}; \
    dstpixel &= ~(planemask); \
    dstpixel |= (src & planemask); \
    *(pdst) &= cfbrmask[idx]; \
    switch(idx){ \
    	case 0: \
		*(pdst) |=  (dstpixel & cfbmask[idx]); \
		break; \
    	case 2: \
    	case 4: \
		pdst++;idx++; \
		*(pdst) = ((*(pdst))  & cfbrmask[idx]) | \
				(BitLeft(dstpixel, cfb24Shift[idx]) & cfbmask[idx]); \
		pdst--;idx--; \
    	case 6: \
		*(pdst) |=  (BitRight(dstpixel, cfb24Shift[idx]) & cfbmask[idx]); \
		break; \
	}; \
}

#define putbitsrop24(src, x, pdst, planemask, rop) \
{ \
    register PixelGroup t1, dstpixel; \
    register unsigned int idx; \
    switch(idx = (x)<<1){ \
    	case 0: \
		dstpixel = (*(pdst) &cfbmask[idx]); \
		break; \
    	case 6: \
		dstpixel = BitLeft((*(pdst) &cfbmask[idx]), cfb24Shift[idx]); \
		break; \
	default: \
		dstpixel = BitLeft((*(pdst) &cfbmask[idx]), cfb24Shift[idx])| \
		BitRight(((*((pdst)+1)) &cfbmask[idx+1]), cfb24Shift[idx+1]); \
	}; \
    DoRop(t1, rop, (src), dstpixel); \
    dstpixel &= ~planemask; \
    dstpixel |= (t1 & planemask); \
    *(pdst) &= cfbrmask[idx]; \
    switch(idx){ \
    	case 0: \
		*(pdst) |= (dstpixel & cfbmask[idx]); \
		break; \
    	case 2: \
    	case 4: \
		*((pdst)+1) = ((*((pdst)+1))  & cfbrmask[idx+1]) | \
				(BitLeft(dstpixel, cfb24Shift[idx+1]) & (cfbmask[idx+1])); \
    	case 6: \
		*(pdst) |= (BitRight(dstpixel, cfb24Shift[idx]) & cfbmask[idx]); \
	}; \
}
# else  /* PSZ == 24 && PPW == 1 */
#define maskbits(x, w, startmask, endmask, nlw) \
    startmask = cfbstarttab[(x)&PIM]; \
    endmask = cfbendtab[((x)+(w)) & PIM]; \
    if (startmask) \
	nlw = (((w) - (PPW - ((x)&PIM))) >> PWSH); \
    else \
	nlw = (w) >> PWSH;

#define maskpartialbits(x, w, mask) \
    mask = cfbstartpartial[(x) & PIM] & cfbendpartial[((x) + (w)) & PIM];

#define mask32bits(x, w, startmask, endmask) \
    startmask = cfbstarttab[(x)&PIM]; \
    endmask = cfbendtab[((x)+(w)) & PIM];

/* FIXME */
#define maskbits24(x, w, startmask, endmask, nlw) \
    abort()
#define getbits24(psrc, dst, index) \
    abort()
#define putbits24(src, x, w, pdst, planemask, index) \
    abort()
#define putbitsrop24(src, x, pdst, planemask, rop) \
    abort()

#endif /* PSZ == 24 && PPW == 1 */

#define getbits(psrc, x, w, dst) \
if ( ((x) + (w)) <= PPW) \
{ \
    dst = SCRLEFT(*(psrc), (x)); \
} \
else \
{ \
    int m; \
    m = PPW-(x); \
    dst = (SCRLEFT(*(psrc), (x)) & cfbendtab[m]) | \
	  (SCRRIGHT(*((psrc)+1), m) & cfbstarttab[m]); \
}


#define putbits(src, x, w, pdst, planemask) \
if ( ((x)+(w)) <= PPW) \
{ \
    PixelGroup tmpmask; \
    maskpartialbits((x), (w), tmpmask); \
    tmpmask &= PFILL(planemask); \
    *(pdst) = (*(pdst) & ~tmpmask) | (SCRRIGHT(src, x) & tmpmask); \
} \
else \
{ \
    unsigned long m; \
    unsigned long n; \
    PixelGroup pm = PFILL(planemask); \
    m = PPW-(x); \
    n = (w) - m; \
    *(pdst) = (*(pdst) & (cfbendtab[x] | ~pm)) | \
	(SCRRIGHT(src, x) & (cfbstarttab[x] & pm)); \
    *((pdst)+1) = (*((pdst)+1) & (cfbstarttab[n] | ~pm)) | \
	(SCRLEFT(src, m) & (cfbendtab[n] & pm)); \
}
#if defined(__GNUC__) && defined(mc68020)
#undef getbits
#define FASTGETBITS(psrc, x, w, dst) \
    asm ("bfextu %3{%1:%2},%0" \
	 : "=d" (dst) : "di" (x), "di" (w), "o" (*(char *)(psrc)))

#define getbits(psrc,x,w,dst) \
{ \
    FASTGETBITS(psrc, (x) * PSZ, (w) * PSZ, dst); \
    dst = SCRLEFT(dst,PPW-(w)); \
}

#define FASTPUTBITS(src, x, w, pdst) \
    asm ("bfins %3,%0{%1:%2}" \
	 : "=o" (*(char *)(pdst)) \
	 : "di" (x), "di" (w), "d" (src), "0" (*(char *) (pdst)))

#undef putbits
#define putbits(src, x, w, pdst, planemask) \
{ \
    if (planemask != PMSK) { \
        PixelGroup _m, _pm; \
        FASTGETBITS(pdst, (x) * PSZ , (w) * PSZ, _m); \
        PFILL2(planemask, _pm); \
        _m &= (~_pm); \
        _m |= (SCRRIGHT(src, PPW-(w)) & _pm); \
        FASTPUTBITS(_m, (x) * PSZ, (w) * PSZ, pdst); \
    } else { \
        FASTPUTBITS(SCRRIGHT(src, PPW-(w)), (x) * PSZ, (w) * PSZ, pdst); \
    } \
}
    

#endif /* mc68020 */

#define putbitsrop(src, x, w, pdst, planemask, rop) \
if ( ((x)+(w)) <= PPW) \
{ \
    PixelGroup tmpmask; \
    PixelGroup t1, t2; \
    maskpartialbits((x), (w), tmpmask); \
    PFILL2(planemask, t1); \
    tmpmask &= t1; \
    t1 = SCRRIGHT((src), (x)); \
    DoRop(t2, rop, t1, *(pdst)); \
    *(pdst) = (*(pdst) & ~tmpmask) | (t2 & tmpmask); \
} \
else \
{ \
    unsigned long m; \
    unsigned long n; \
    PixelGroup t1, t2; \
    PixelGroup pm; \
    PFILL2(planemask, pm); \
    m = PPW-(x); \
    n = (w) - m; \
    t1 = SCRRIGHT((src), (x)); \
    DoRop(t2, rop, t1, *(pdst)); \
    *(pdst) = (*(pdst) & (cfbendtab[x] | ~pm)) | (t2 & (cfbstarttab[x] & pm));\
    t1 = SCRLEFT((src), m); \
    DoRop(t2, rop, t1, *((pdst) + 1)); \
    *((pdst)+1) = (*((pdst)+1) & (cfbstarttab[n] | ~pm)) | \
	(t2 & (cfbendtab[n] & pm)); \
}

#else /* PSZ == 32 && PPW == 1*/

/*
 * These macros can be optimized for 32-bit pixels since there is no
 * need to worry about left/right edge masking.  These macros were
 * derived from the above using the following reductions:
 *
 *	- x & PIW = 0 	[since PIW = 0]
 *	- all masking tables are only indexed by 0  [ due to above ]
 *	- cfbstartab[0] and cfbendtab[0] = 0 	[ no left/right edge masks]
 *    - cfbstartpartial[0] and cfbendpartial[0] = ~0 [no partial pixel mask]
 *
 * Macro reduction based upon constants cannot be performed automatically
 *       by the compiler since it does not know the contents of the masking
 *       arrays in cfbmskbits.c.
 */
#define maskbits(x, w, startmask, endmask, nlw) \
    startmask = endmask = 0; \
    nlw = (w);

#define maskpartialbits(x, w, mask) \
    mask = 0xFFFFFFFF;

#define mask32bits(x, w, startmask, endmask) \
    startmask = endmask = 0;

/*
 * For 32-bit operations, getbits(), putbits(), and putbitsrop() 
 * will only be invoked with x = 0 and w = PPW (1).  The getbits() 
 * macro is only called within left/right edge logic, which doesn't
 * happen for 32-bit pixels.
 */
#define getbits(psrc, x, w, dst) (dst) = *(psrc)

#define putbits(src, x, w, pdst, planemask) \
    *(pdst) = (*(pdst) & ~planemask) | (src & planemask);

#define putbitsrop(src, x, w, pdst, planemask, rop) \
{ \
    PixelGroup t1; \
    DoRop(t1, rop, (src), *(pdst)); \
    *(pdst) = (*(pdst) & ~planemask) | (t1 & planemask); \
}

#endif /* PSZ != 32 */

/*
 * Use these macros only when you're using the MergeRop stuff
 * in ../mfb/mergerop.h
 */

/* useful only when not spanning destination longwords */
#if PSZ == 24
#define putbitsmropshort24(src,x,w,pdst,index) {\
    PixelGroup   _tmpmask; \
    PixelGroup   _t1; \
    maskpartialbits ((x), (w), _tmpmask); \
    _t1 = SCRRIGHT((src), (x)); \
    DoMaskMergeRop24(_t1, pdst, _tmpmask, index); \
}
#endif
#define putbitsmropshort(src,x,w,pdst) {\
    PixelGroup   _tmpmask; \
    PixelGroup   _t1; \
    maskpartialbits ((x), (w), _tmpmask); \
    _t1 = SCRRIGHT((src), (x)); \
    *pdst = DoMaskMergeRop(_t1, *pdst, _tmpmask); \
}

/* useful only when spanning destination longwords */
#define putbitsmroplong(src,x,w,pdst) { \
    PixelGroup   _startmask, _endmask; \
    int		    _m; \
    PixelGroup   _t1; \
    _m = PPW - (x); \
    _startmask = cfbstarttab[x]; \
    _endmask = cfbendtab[(w) - _m]; \
    _t1 = SCRRIGHT((src), (x)); \
    pdst[0] = DoMaskMergeRop(_t1,pdst[0],_startmask); \
    _t1 = SCRLEFT ((src),_m); \
    pdst[1] = DoMaskMergeRop(_t1,pdst[1],_endmask); \
}

#define putbitsmrop(src,x,w,pdst) \
if ((x) + (w) <= PPW) {\
    putbitsmropshort(src,x,w,pdst); \
} else { \
    putbitsmroplong(src,x,w,pdst); \
}

#if GETLEFTBITS_ALIGNMENT == 1
#define getleftbits(psrc, w, dst)	dst = *((unsigned int *) psrc)
#define getleftbits24(psrc, w, dst, idx){	\
	regiseter int index; \
	switch(index = ((idx)&3)<<1){ \
	case 0: \
	dst = (*((unsigned int *) psrc))&cfbmask[index]; \
	break; \
	case 2: \
	case 4: \
	dst = BitLeft(((*((unsigned int *) psrc))&cfbmask[index]), cfb24Shift[index]); \
	dst |= BitRight(((*((unsigned int *) psrc)+1)&cfbmask[index]), cfb4Shift[index]); \
	break; \
	case 6: \
	dst = BitLeft((*((unsigned int *) psrc)),cfb24Shift[index]); \
	break; \
	}; \
}
#endif /* GETLEFTBITS_ALIGNMENT == 1 */

#define getglyphbits(psrc, x, w, dst) \
{ \
    dst = BitLeft((unsigned) *(psrc), (x)); \
    if ( ((x) + (w)) > 32) \
	dst |= (BitRight((unsigned) *((psrc)+1), 32-(x))); \
}
#if GETLEFTBITS_ALIGNMENT == 2
#define getleftbits(psrc, w, dst) \
    { \
	if ( ((int)(psrc)) & 0x01 ) \
		getglyphbits( ((unsigned int *)(((char *)(psrc))-1)), 8, (w), (dst) ); \
	else \
		dst = *((unsigned int *) psrc); \
    }
#endif /* GETLEFTBITS_ALIGNMENT == 2 */

#if GETLEFTBITS_ALIGNMENT == 4
#define getleftbits(psrc, w, dst) \
    { \
	int off, off_b; \
	off_b = (off = ( ((int)(psrc)) & 0x03)) << 3; \
	getglyphbits( \
		(unsigned int *)( ((char *)(psrc)) - off), \
		(off_b), (w), (dst) \
	       ); \
    }
#endif /* GETLEFTBITS_ALIGNMENT == 4 */

/*
 * getstipplepixels( psrcstip, x, w, ones, psrcpix, destpix )
 *
 * Converts bits to pixels in a reasonable way.  Takes w (1 <= w <= PPW)
 * bits from *psrcstip, starting at bit x; call this a quartet of bits.
 * Then, takes the pixels from *psrcpix corresponding to the one-bits (if
 * ones is TRUE) or the zero-bits (if ones is FALSE) of the quartet
 * and puts these pixels into destpix.
 *
 * Example:
 *
 *      getstipplepixels( &(0x08192A3B), 17, 4, 1, &(0x4C5D6E7F), dest )
 *
 * 0x08192A3B = 0000 1000 0001 1001 0010 1010 0011 1011
 *
 * This will take 4 bits starting at bit 17, so the quartet is 0x5 = 0101.
 * It will take pixels from 0x4C5D6E7F corresponding to the one-bits in this
 * quartet, so dest = 0x005D007F.
 *
 * XXX Works with both byte order.
 * XXX This works for all values of x and w within a doubleword.
 */
#if (BITMAP_BIT_ORDER == MSBFirst)
#define getstipplepixels( psrcstip, x, w, ones, psrcpix, destpix ) \
{ \
    PixelGroup q; \
    int m; \
    if ((m = ((x) - ((PPW*PSZ)-PPW))) > 0) { \
        q = (*(psrcstip)) << m; \
	if ( (x)+(w) > (PPW*PSZ) ) \
	    q |= *((psrcstip)+1) >> ((PPW*PSZ)-m); \
    } \
    else \
        q = (*(psrcstip)) >> -m; \
    q = QuartetBitsTable[(w)] & ((ones) ? q : ~q); \
    *(destpix) = (*(psrcpix)) & QuartetPixelMaskTable[q]; \
}
#else /* BITMAP_BIT_ORDER == LSB */

/*================================================================
   BEGIN ORL VNC modification
   Only use ldq_u on XFREE86 platforms */

#ifdef XFREE86
#define getstipplepixels( psrcstip, xt, w, ones, psrcpix, destpix ) \
{ \
    PixelGroup q; \
    q = ldq_u(psrcstip) >> (xt); \
    if ( ((xt)+(w)) > (PPW*PSZ) ) \
        q |= (ldq_u((psrcstip)+1)) << ((PPW*PSZ)-(xt)); \
    q = QuartetBitsTable[(w)] & ((ones) ? q : ~q); \
    *(destpix) = (*(psrcpix)) & QuartetPixelMaskTable[q]; \
}
#else /* XFREE86 */
#define getstipplepixels( psrcstip, xt, w, ones, psrcpix, destpix ) \
{ \
    PixelGroup q; \
    q = *(psrcstip) >> (xt); \
    if ( ((xt)+(w)) > (PPW*PSZ) ) \
        q |= (*((psrcstip)+1)) << ((PPW*PSZ)-(xt)); \
    q = QuartetBitsTable[(w)] & ((ones) ? q : ~q); \
    *(destpix) = (*(psrcpix)) & QuartetPixelMaskTable[q]; \
}
#endif /* XFREE86 */

/* END ORL VNC modification
================================================================*/

#if PSZ == 24
# if 0
#define getstipplepixels24( psrcstip,xt,w,ones,psrcpix,destpix,stipindex,srcindex,dstindex) \
{ \
    PixelGroup q, srcpix, srcstip; \
    unsigned long src; \
    register unsigned int sidx; \
    register unsigned int didx; \
    register unsigned int stipidx; \
    sidx = ((srcindex) & 3)<<1; \
    didx = ((dstindex) & 3)<<1; \
    q = *(psrcstip) >> (xt); \
/*    if((srcindex)!=0)*/ \
/*    src = (((*(psrcpix)) << cfb24Shift[sidx]) & (cfbmask[sidx])) |*/ \
/*	(((*((psrcpix)+1)) << cfb24Shift[sidx+1]) & (cfbmask[sidx+1])); */\
/*    else */\
	src = (*(psrcpix))&0xFFFFFF; \
    if ( ((xt)+(w)) > PGSZ ) \
        q |= (*((psrcstip)+1)) << (PGSZ -(xt)); \
    q = QuartetBitsTable[(w)] & ((ones) ? q : ~q); \
    src &= QuartetPixelMaskTable[q]; \
    *(destpix) &= cfbrmask[didx]; \
    switch(didx) {\
	case 0: \
		*(destpix) |= (src &cfbmask[didx]); \
		break; \
	case 2: \
	case 4: \
		destpix++;didx++; \
		*(destpix) = ((*(destpix)) & (cfbrmask[didx]))| \
			(BitLeft(src, cfb24Shift[didx]) & (cfbmask[didx])); \
		destpix--; didx--;\
	case 6: \
		*(destpix) |= (BitRight(src, cfb24Shift[didx]) & cfbmask[didx]); \
		break; \
	}; \
}
# else
#define getstipplepixels24(psrcstip,xt,ones,psrcpix,destpix,stipindex) \
{ \
    PixelGroup q, srcpix, srcstip; \
    unsigned long src; \
    register unsigned int stipidx; \
    q = *(psrcstip) >> (xt); \
    q = ((ones) ? q : ~q) & 1; \
    *(destpix) = (*(psrcpix)) & QuartetPixelMaskTable[q]; \
}
# endif
#endif /* PSZ == 24 */
#endif

extern PixelGroup cfbstarttab[];
extern PixelGroup cfbendtab[];
extern PixelGroup cfbstartpartial[];
extern PixelGroup cfbendpartial[];
extern PixelGroup cfbrmask[];
extern PixelGroup cfbmask[];
extern PixelGroup QuartetBitsTable[];
extern PixelGroup QuartetPixelMaskTable[];
#if PSZ == 24
extern int cfb24Shift[];
#endif