cfb8bit.c

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    cfb8StippleBg = bg & PMSK;
    cfb8StipplePm = planemask & PMSK;
    rropfg = cfbReduceRasterOp (alu, cfb8StippleFg, cfb8StipplePm, &andfg, &xorfg);
    rropbg = cfbReduceRasterOp (alu, cfb8StippleBg, cfb8StipplePm, &andbg, &xorbg);
    if (rropfg == rropbg)
	cfb8StippleRRop = rropfg;
    else
	cfb8StippleRRop = GXset;
    /*
     * create the appropriate pixel-fill bits for current
     * foreground
     */
    for (s = 0; s < NUM_MASKS; s++)
    {
	c = cfb8StippleMasks[s];
	cfb8StippleAnd[s] = (andfg | ~c) & (andbg | c);
	cfb8StippleXor[s] = (xorfg & c) | (xorbg & ~c);
    }
    return TRUE;
}

/*
 * a grungy little routine.  This computes clip masks
 * for partial character blts.  Returns rgnOUT if the
 * entire character is clipped; returns rgnIN if the entire
 * character is unclipped; returns rgnPART if a portion of
 * the character is visible.  Computes clip masks for each
 * longword of the character -- and those with the
 * contents of the glyph to compute the visible bits.
 */

#if PGSZ == 32
#if (BITMAP_BIT_ORDER == MSBFirst)
PixelGroup cfb8BitLenMasks[PGSZ] = {
    0xffffffff, 0x7fffffff, 0x3fffffff, 0x1fffffff,
    0x0fffffff, 0x07ffffff, 0x03ffffff, 0x01ffffff,
    0x00ffffff, 0x007fffff, 0x003fffff, 0x001fffff,
    0x000fffff, 0x0007ffff, 0x0003ffff, 0x0001ffff,
    0x0000ffff, 0x00007fff, 0x00003fff, 0x00001fff,
    0x00000fff, 0x000007ff, 0x000003ff, 0x000001ff,
    0x000000ff, 0x0000007f, 0x0000003f, 0x0000001f,
    0x0000000f, 0x00000007, 0x00000003, 0x00000001,
};
#else
PixelGroup cfb8BitLenMasks[PGSZ] = {
    0xffffffff, 0xfffffffe, 0xfffffffc, 0xfffffff8,
    0xfffffff0, 0xffffffe0, 0xffffffc0, 0xffffff80,
    0xffffff00, 0xfffffe00, 0xfffffc00, 0xfffff800,
    0xfffff000, 0xffffe000, 0xffffc000, 0xffff8000,
    0xffff0000, 0xfffe0000, 0xfffc0000, 0xfff80000,
    0xfff00000, 0xffe00000, 0xffc00000, 0xff800000,
    0xff000000, 0xfe000000, 0xfc000000, 0xf8000000,
    0xf0000000, 0xe0000000, 0xc0000000, 0x80000000,
};
#endif /* BITMAP_BIT_ORDER */
#else /* PGSZ == 64 */
#if (BITMAP_BIT_ORDER == MSBFirst)
PixelGroup cfb8BitLenMasks[PGSZ] = {
    0xffffffffffffffff,    0x7fffffffffffffff,
    0x3fffffffffffffff,    0x1fffffffffffffff,
    0x0fffffffffffffff,    0x07ffffffffffffff,
    0x03ffffffffffffff,    0x01ffffffffffffff,
    0x00ffffffffffffff,    0x007fffffffffffff,
    0x003fffffffffffff,    0x001fffffffffffff,
    0x000fffffffffffff,    0x0007ffffffffffff,
    0x0003ffffffffffff,    0x0001ffffffffffff,
    0x0000ffffffffffff,    0x00007fffffffffff,
    0x00003fffffffffff,    0x00001fffffffffff,
    0x00000fffffffffff,    0x000007ffffffffff,
    0x000003ffffffffff,    0x000001ffffffffff,
    0x000000ffffffffff,    0x0000007fffffffff,
    0x0000003fffffffff,    0x0000001fffffffff,
    0x0000000fffffffff,    0x00000007ffffffff,
    0x00000003ffffffff,    0x00000001ffffffff,
    0x00000000ffffffff,    0x000000007fffffff,
    0x000000003fffffff,    0x000000001fffffff,
    0x000000000fffffff,    0x0000000007ffffff,
    0x0000000003ffffff,    0x0000000001ffffff,
    0x0000000000ffffff,    0x00000000007fffff,
    0x00000000003fffff,    0x00000000001fffff,
    0x00000000000fffff,    0x000000000007ffff,
    0x000000000003ffff,    0x000000000001ffff,
    0x000000000000ffff,    0x0000000000007fff,
    0x0000000000003fff,    0x0000000000001fff,
    0x0000000000000fff,    0x00000000000007ff,
    0x00000000000003ff,    0x00000000000001ff,
    0x00000000000000ff,    0x000000000000007f,
    0x000000000000003f,    0x000000000000001f,
    0x000000000000000f,    0x0000000000000007,
    0x0000000000000003,    0x0000000000000001
};
#else
PixelGroup cfb8BitLenMasks[PGSZ] = {
    0xffffffffffffffff,    0xfffffffffffffffe,
    0xfffffffffffffffc,    0xfffffffffffffff8,
    0xfffffffffffffff0,    0xffffffffffffffe0,
    0xffffffffffffffc0,    0xffffffffffffff80,
    0xffffffffffffff00,    0xfffffffffffffe00,
    0xfffffffffffffc00,    0xfffffffffffff800,
    0xfffffffffffff000,    0xffffffffffffe000,
    0xffffffffffffc000,    0xffffffffffff8000,
    0xffffffffffff0000,    0xfffffffffffe0000,
    0xfffffffffffc0000,    0xfffffffffff80000,
    0xfffffffffff00000,    0xffffffffffe00000,
    0xffffffffffc00000,    0xffffffffff800000,
    0xffffffffff000000,    0xfffffffffe000000,
    0xfffffffffc000000,    0xfffffffff8000000,
    0xfffffffff0000000,    0xffffffffe0000000,
    0xffffffffc0000000,    0xffffffff80000000,
    0xffffffff00000000,    0xfffffffe00000000,
    0xfffffffc00000000,    0xfffffff800000000,
    0xfffffff000000000,    0xffffffe000000000,
    0xffffffc000000000,    0xffffff8000000000,
    0xffffff0000000000,    0xfffffe0000000000,
    0xfffffc0000000000,    0xfffff80000000000,
    0xfffff00000000000,    0xffffe00000000000,
    0xffffc00000000000,    0xffff800000000000,
    0xffff000000000000,    0xfffe000000000000,
    0xfffc000000000000,    0xfff8000000000000,
    0xfff0000000000000,    0xffe0000000000000,
    0xffc0000000000000,    0xff80000000000000,
    0xff00000000000000,    0xfe00000000000000,
    0xfc00000000000000,    0xf800000000000000,
    0xf000000000000000,    0xe000000000000000,
    0xc000000000000000,    0x8000000000000000
};
#endif /* BITMAP_BIT_ORDER */
#endif /* PGSZ */



int
cfb8ComputeClipMasks32 (pBox, numRects, x, y, w, h, clips)
    BoxPtr	pBox;
    int		numRects;
    int		x, y, w, h;
    CARD32      *clips;
{
    int	    yBand, yBandBot;
    int	    ch;
    unsigned long	    clip;
    int	    partIN = FALSE, partOUT = FALSE;
    int	    result;

    if (numRects == 0)
	return rgnOUT;
    while (numRects && pBox->y2 <= y)
    {
	--numRects;
	++pBox;
    }
    if (!numRects || pBox->y1 >= y + h)
	return rgnOUT;
    yBand = pBox->y1;
    while (numRects && pBox->y1 == yBand && pBox->x2 <= x)
    {
	--numRects;
	++pBox;
    }
    if (!numRects || pBox->y1 >= y + h)
	return rgnOUT;
    if (numRects &&
	x >= pBox->x1 &&
	x + w <= pBox->x2 &&
	y >= pBox->y1 &&
	y + h <= pBox->y2)
    {
	return rgnIN;
    }
    ch = 0;
    while (numRects && pBox->y1 < y + h)
    {
	yBand = pBox->y1;
	yBandBot = pBox->y2;
 	while (ch < h && y + ch < yBand)
 	{
 	    partOUT = TRUE;
 	    clips[ch++] = 0;
 	}
 	if (ch >= h)
 	    break;
    	while (numRects && pBox->y1 == yBand && pBox->x2 <= x)
    	{
	    --numRects;
	    ++pBox;
    	}
    	if (!numRects)
	    break;
	clip = 0;
    	while (numRects && pBox->y1 == yBand && pBox->x1 < x + w)
    	{
	    if (x < pBox->x1)
		if (pBox->x2 < x + w)
		    clip |= cfb8BitLenMasks[pBox->x1 - x] & ~cfb8BitLenMasks[pBox->x2 - x];
		else
		    clip |= cfb8BitLenMasks[pBox->x1 - x];
 	    else
		if (pBox->x2 < x + w)
		    clip |= ~cfb8BitLenMasks[pBox->x2 - x];
		else
		    clip = ~0;
	    --numRects;
	    ++pBox;
    	}
	if (clip != 0)
		partIN = TRUE;
	if (clip != ~0)
		partOUT = TRUE;
	while (ch < h && y + ch < yBandBot)
	    clips[ch++] = clip;
	while (numRects && pBox->y1 == yBand)
	{
	    --numRects;
	    ++pBox;
	}
    }
    while (ch < h)
    {
	partOUT = TRUE;
	clips[ch++] = 0;
    }
    result = rgnOUT;
    if (partIN)
    {
	if (partOUT)
	    result = rgnPART;
	else
	    result = rgnIN;
    }
    return result;
}

#endif /* PSZ == 8 */