xenocara/xserver/cfb/cfbrctstp8.c

/*
 * Fill 32 bit stippled rectangles for 8 bit frame buffers
 */
/*

Copyright 1989, 1998  The Open Group

Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.

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
OPEN GROUP 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 Open Group 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 Open Group.

Author: Keith Packard, MIT X Consortium

*/


#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif

#if PSZ == 8

#include <X11/X.h>
#include <X11/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"

#define MFB_CONSTS_ONLY
#include "maskbits.h"

void
cfb8FillRectOpaqueStippled32 (pDrawable, pGC, nBox, pBox)
    DrawablePtr	    pDrawable;
    GCPtr	    pGC;
    int		    nBox;	/* number of boxes to fill */
    register BoxPtr pBox;	/* pointer to list of boxes to fill */
{
    CfbBits   *src;
    int stippleHeight;

    int nlwDst;		/* width in longwords of the dest pixmap */
    int w;		/* width of current box */
    register int h;	/* height of current box */
    CfbBits startmask;
    CfbBits endmask;	/* masks for reggedy bits at either end of line */
    int nlwMiddle;	/* number of longwords between sides of boxes */
    register int nlw;			/* loop version of nlwMiddle */
    CfbBits *dstLine;
    register CfbBits *dst;	/* pointer to bits we're writing */
    CfbBits *dstTmp;
    int y;				/* current scan line */

    CfbBits *pbits;/* pointer to start of pixmap */
    register CfbBits bits;	/* bits from stipple */
    int	rot;
    register CfbBits xor;
    PixmapPtr		    stipple;
    int	    wEnd;

    stipple = pGC->pRotatedPixmap;

    cfb8CheckOpaqueStipple(pGC->alu, pGC->fgPixel, pGC->bgPixel, pGC->planemask);

    stippleHeight = stipple->drawable.height;
    src = (CfbBits *)stipple->devPrivate.ptr;

    cfbGetLongWidthAndPointer (pDrawable, nlwDst, pbits)

    while (nBox--)
    {
	w = pBox->x2 - pBox->x1;
	h = pBox->y2 - pBox->y1;
	y = pBox->y1;
	dstLine = pbits + (pBox->y1 * nlwDst) + ((pBox->x1 & ~PIM) >> PWSH);
	if (((pBox->x1 & PIM) + w) <= PPW)
	{
	    maskpartialbits(pBox->x1, w, startmask);
	    nlwMiddle = 0;
	    endmask = 0;
	}
	else
	{
	    maskbits (pBox->x1, w, startmask, endmask, nlwMiddle);
	}
	rot = (pBox->x1 & ((PGSZ-1) & ~PIM));
	pBox++;
	y = y % stippleHeight;
#if PPW == 4
	if (cfb8StippleRRop == GXcopy)
	{
	    if (w < PGSZ*2)
	    {
	    	while (h--)
	    	{
	    	    bits = src[y];
	    	    y++;
	    	    if (y == stippleHeight)
		    	y = 0;
	    	    if (rot)
		    	RotBitsLeft(bits,rot);
		    dst = dstLine;
	    	    dstLine += nlwDst;
	    	    if (startmask)
	    	    {
		    	*dst = (*dst & ~startmask) |
			       (GetPixelGroup (bits) & startmask);
		    	dst++;
		    	RotBitsLeft (bits, PGSZB);
	    	    }
		    nlw = nlwMiddle;
	    	    while (nlw--)
	    	    {
			*dst++ = GetPixelGroup(bits);
		    	RotBitsLeft (bits, PGSZB);
	    	    }
	    	    if (endmask)
	    	    {
			*dst = (*dst & ~endmask) |
			       (GetPixelGroup (bits) & endmask);
	    	    }
	    	}
	    }
	    else
	    {
		wEnd = 7 - (nlwMiddle & 7);
		nlwMiddle = (nlwMiddle >> 3) + 1;
	    	while (h--)
	    	{
		    bits = src[y];
		    y++;
		    if (y == stippleHeight)
			y = 0;
	    	    if (rot != 0)
			RotBitsLeft (bits, rot);
	    	    dstTmp = dstLine;
	    	    dstLine += nlwDst;
		    if (startmask)
		    {
			*dstTmp = (*dstTmp & ~startmask) |
				  (GetPixelGroup (bits) & startmask);
			dstTmp++;
			RotBitsLeft (bits, PGSZB);
		    }
		    w = 7 - wEnd;
		    while (w--)
		    {
			nlw = nlwMiddle;
			dst = dstTmp;
			dstTmp++;
			xor = GetPixelGroup (bits);
			while (nlw--)
			{
			    *dst = xor;
			    dst += 8;
			}
			NextBitGroup (bits);
		    }
		    nlwMiddle--;
		    w = wEnd + 1;
		    if (endmask)
		    {
			dst = dstTmp + (nlwMiddle << 3);
			*dst = (*dst & ~endmask) |
			       (GetPixelGroup(bits) & endmask);
		    }
		    while (w--)
		    {
			nlw = nlwMiddle;
			dst = dstTmp;
			dstTmp++;
			xor = GetPixelGroup (bits);
			while (nlw--)
			{
			    *dst = xor;
			    dst += 8;
			}
			NextBitGroup (bits);
		    }
		    nlwMiddle++;
		}
	    }
	}
	else
#endif /* PPW == 4 */
	{
	    while (h--)
	    {
	    	bits = src[y];
	    	y++;
	    	if (y == stippleHeight)
		    y = 0;
	    	if (rot)
		    RotBitsLeft(bits,rot);
		dst = dstLine;
	    	dstLine += nlwDst;
	    	if (startmask)
	    	{
		    xor = GetBitGroup(bits);
		    *dst = MaskRRopPixels(*dst, xor, startmask);
		    dst++;
		    RotBitsLeft (bits, PGSZB);
	    	}
		nlw = nlwMiddle;
	    	while (nlw--)
	    	{
		    RRopBitGroup(dst, GetBitGroup(bits));
		    dst++;
		    RotBitsLeft (bits, PGSZB);
	    	}
	    	if (endmask)
	    	{
		    xor = GetBitGroup(bits);
		    *dst = MaskRRopPixels(*dst, xor, endmask);
	    	}
	    }
	}
    }
}

void
cfb8FillRectTransparentStippled32 (pDrawable, pGC, nBox, pBox)
    DrawablePtr	    pDrawable;
    GCPtr	    pGC;
    int		    nBox;	/* number of boxes to fill */
    BoxPtr 	    pBox;	/* pointer to list of boxes to fill */
{
    int		    x, y, w, h;
    int		    nlwMiddle, nlwDst;
    CfbBits   startmask, endmask;
    register CfbBits   *dst;
    CfbBits   *dstLine, *pbits, *dstTmp;
    CfbBits   *src;
    register CfbBits   xor;
    register CfbBits   bits, mask;
    int		    rot;
    int		    wEnd;
    cfbPrivGCPtr    devPriv;
    PixmapPtr	    stipple;
    int		    stippleHeight;
    register int    nlw;
    
    devPriv = cfbGetGCPrivate(pGC);
    stipple = pGC->pRotatedPixmap;
    src = (CfbBits *)stipple->devPrivate.ptr;
    stippleHeight = stipple->drawable.height;

    cfb8CheckStipple (pGC->alu, pGC->fgPixel, pGC->planemask);

    cfbGetLongWidthAndPointer (pDrawable, nlwDst, pbits)

    while (nBox--)
    {
	x = pBox->x1;
    	w = pBox->x2 - x;
	if (((x & PIM) + w) <= PPW)
	{
	    maskpartialbits(x, w, startmask);
	    endmask = 0;
	    nlwMiddle = 0;
	}
	else
	{
	    maskbits (x, w, startmask, endmask, nlwMiddle);
	}
	rot = (x & ((PGSZ-1) & ~PIM));
    	y = pBox->y1;
    	dstLine = pbits + (y * nlwDst) + (x >> PWSH);
    	h = pBox->y2 - y;
	pBox++;
	y %= stippleHeight;
#if PPW == 4
	if (cfb8StippleRRop == GXcopy)
	{
	    xor = devPriv->xor;
	    if (w < PGSZ*2)
	    {
	    	while (h--)
	    	{
		    bits = src[y];
		    y++;
		    if (y == stippleHeight)
			y = 0;
	    	    if (rot != 0)
			RotBitsLeft (bits, rot);
	    	    dst = dstLine;
	    	    dstLine += nlwDst;
	    	    if (startmask)
	    	    {
		    	mask = cfb8PixelMasks[GetBitGroup(bits)];
		    	*dst = (*dst & ~(mask & startmask)) |
		       	       (xor & (mask & startmask));
		    	dst++;
		    	RotBitsLeft (bits, PGSZB);
	    	    }
		    nlw = nlwMiddle;
	    	    while (nlw--)
	    	    {
		    	WriteBitGroup (dst,xor,GetBitGroup(bits))
		    	dst++;
		    	RotBitsLeft (bits, PGSZB);
	    	    }
	    	    if (endmask)
	    	    {
		    	mask = cfb8PixelMasks[GetBitGroup(bits)];
		    	*dst = (*dst & ~(mask & endmask)) |
		       	       (xor & (mask & endmask));
	    	    }
	    	}
	    }
	    else
	    {
		wEnd = 7 - (nlwMiddle & 7);
		nlwMiddle = (nlwMiddle >> 3) + 1;
	    	while (h--)
	    	{
		    bits = src[y];
		    y++;
		    if (y == stippleHeight)
			y = 0;
	    	    if (rot != 0)
			RotBitsLeft (bits, rot);
	    	    dstTmp = dstLine;
	    	    dstLine += nlwDst;
		    if (startmask)
		    {
		    	mask = cfb8PixelMasks[GetBitGroup(bits)];
		    	*dstTmp = (*dstTmp & ~(mask & startmask)) |
		       	       (xor & (mask & startmask));
		    	dstTmp++;
		    	RotBitsLeft (bits, PGSZB);
		    }
		    w = 7 - wEnd;
		    while (w--)
		    {
			nlw = nlwMiddle;
			dst = dstTmp;
			dstTmp++;
#if defined(__GNUC__) && defined(mc68020)
			mask = cfb8PixelMasks[GetBitGroup(bits)];
			xor = xor & mask;
			mask = ~mask;
			while (nlw--)
			{
			    *dst = (*dst & mask) | xor;
			    dst += 8;
			}
			xor = devPriv->xor;
#else
#define SwitchBitsLoop(body) \
	while (nlw--)	\
	{		\
	    body	\
	    dst += 8;	\
	}
			SwitchBitGroup(dst, xor, GetBitGroup(bits));
#undef SwitchBitsLoop
#endif
			NextBitGroup (bits);
		    }
		    nlwMiddle--;
		    w = wEnd + 1;
		    if (endmask)
		    {
			mask = cfb8PixelMasks[GetBitGroup(bits)];
			dst = dstTmp + (nlwMiddle << 3);
			*dst = (*dst & ~(mask & endmask)) |
			       (xor &  (mask & endmask));
		    }
		    while (w--)
		    {
			nlw = nlwMiddle;
			dst = dstTmp;
			dstTmp++;
#if defined(__GNUC__) && defined(mc68020)
			mask = cfb8PixelMasks[GetBitGroup(bits)];
			xor = xor & mask;
			mask = ~mask;
			while (nlw--)
			{
			    *dst = (*dst & mask) | xor;
			    dst += 8;
			}
			xor = devPriv->xor;
#else
#define SwitchBitsLoop(body) \
	while (nlw--)	\
	{		\
	    body	\
	    dst += 8;	\
	}
			SwitchBitGroup(dst, xor, GetBitGroup(bits));
#undef SwitchBitsLoop
#endif
			NextBitGroup (bits);
		    }
		    nlwMiddle++;
		}
	    }
	}
	else
#endif /* PPW == 4 */
	{
	    while (h--)
	    {
		bits = src[y];
		y++;
		if (y == stippleHeight)
		    y = 0;
	    	if (rot != 0)
		    RotBitsLeft (bits, rot);
	    	dst = dstLine;
	    	dstLine += nlwDst;
	    	if (startmask)
	    	{
		    xor = GetBitGroup(bits);
		    *dst = MaskRRopPixels(*dst, xor, startmask);
		    dst++;
		    RotBitsLeft (bits, PGSZB);
	    	}
		nlw = nlwMiddle;
	    	while (nlw--)
	    	{
		    RRopBitGroup(dst, GetBitGroup(bits));
		    dst++;
		    RotBitsLeft (bits, PGSZB);
	    	}
	    	if (endmask)
	    	{
		    xor = GetBitGroup(bits);
		    *dst = MaskRRopPixels(*dst, xor, endmask);
	    	}
	    }
	}
    }
}


void
cfb8FillRectStippledUnnatural (pDrawable, pGC, nBox, pBox)
    DrawablePtr	    pDrawable;
    GCPtr	    pGC;
    int		    nBox;
    register BoxPtr pBox;
{
    CfbBits   *pdstBase;	/* pointer to start of bitmap */
    CfbBits   *pdstLine;	/* current destination line */
    int		    nlwDst;	/* width in longwords of bitmap */
    PixmapPtr	    pStipple;	/* pointer to stipple we want to fill with */
    int		    nlwMiddle;
    register int    nlw;
    int		    x, y, w, h, xrem, xSrc, ySrc;
    int		    stwidth, stippleWidth;
    int		    stippleHeight;
    register CfbBits  bits, inputBits;
    register int    partBitsLeft;
    int		    nextPartBits;
    int		    bitsLeft, bitsWhole;
    register CfbBits    *pdst;	/* pointer to current word in bitmap */
    CfbBits   *srcTemp, *srcStart;
    CfbBits   *psrcBase;
    CfbBits   startmask, endmask;

    if (pGC->fillStyle == FillStippled)
	cfb8CheckStipple (pGC->alu, pGC->fgPixel, pGC->planemask);
    else
	cfb8CheckOpaqueStipple (pGC->alu, pGC->fgPixel, pGC->bgPixel, pGC->planemask);

    if (cfb8StippleRRop == GXnoop)
	return;

    /*
     *  OK,  so what's going on here?  We have two Drawables:
     *
     *  The Stipple:
     *		Depth = 1
     *		Width = stippleWidth
     *		Words per scanline = stwidth
     *		Pointer to pixels = pStipple->devPrivate.ptr
     */

    pStipple = pGC->stipple;

    stwidth = pStipple->devKind >> PWSH;
    stippleWidth = pStipple->drawable.width;
    stippleHeight = pStipple->drawable.height;
    psrcBase = (CfbBits *) pStipple->devPrivate.ptr;

    /*
     *	The Target:
     *		Depth = PSZ
     *		Width = determined from *pwidth
     *		Words per scanline = nlwDst
     *		Pointer to pixels = addrlBase
     */

    xSrc = pDrawable->x;
    ySrc = pDrawable->y;

    cfbGetLongWidthAndPointer (pDrawable, nlwDst, pdstBase)

    /* this replaces rotating the stipple. Instead we just adjust the offset
     * at which we start grabbing bits from the stipple.
     * Ensure that ppt->x - xSrc >= 0 and ppt->y - ySrc >= 0,
     * so that iline and xrem always stay within the stipple bounds.
     */

    xSrc += (pGC->patOrg.x % stippleWidth) - stippleWidth;
    ySrc += (pGC->patOrg.y % stippleHeight) - stippleHeight;

    bitsWhole = stippleWidth;

    while (nBox--)
    {
	x = pBox->x1;
	y = pBox->y1;
	w = pBox->x2 - x;
	h = pBox->y2 - y;
	pBox++;
	pdstLine = pdstBase + y * nlwDst + (x >> PWSH);
	y = (y - ySrc) % stippleHeight;
	srcStart = psrcBase + y * stwidth;
	xrem = ((x & ~PIM) - xSrc) % stippleWidth;
	if (((x & PIM) + w) < PPW)
	{
	    maskpartialbits (x, w, startmask);
	    nlwMiddle = 0;
	    endmask = 0;
	}
	else
	{
	    maskbits (x, w, startmask, endmask, nlwMiddle);
	}
	while (h--)
	{
    	    srcTemp = srcStart + (xrem >> MFB_PWSH);
    	    bitsLeft = stippleWidth - (xrem & ~MFB_PIM);
	    NextUnnaturalStippleWord
	    NextSomeBits (inputBits, (xrem & MFB_PIM));
	    partBitsLeft -= (xrem & MFB_PIM);
	    NextUnnaturalStippleBits
	    nlw = nlwMiddle;
	    pdst = pdstLine;
	    if (startmask)
	    {
		*pdst = MaskRRopPixels(*pdst,bits,startmask);
		pdst++;
		NextUnnaturalStippleBits
	    }
	    while (nlw--)
	    {
		*pdst = RRopPixels(*pdst,bits);
		pdst++;
		NextUnnaturalStippleBits
	    }
	    if (endmask)
		*pdst = MaskRRopPixels(*pdst,bits,endmask);
	    pdstLine += nlwDst;
	    y++;
	    srcStart += stwidth;
	    if (y == stippleHeight)
	    {
		y = 0;
		srcStart = psrcBase;
	    }
	}
    }
}

#endif /* PSZ == 8 */