xserver-multidpi/cfb/cfbpolypnt.c

/************************************************************

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.

********************************************************/


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

#include <X11/X.h>
#include "gcstruct.h"
#include "windowstr.h"
#include "pixmapstr.h"
#include "regionstr.h"
#include "scrnintstr.h"
#include "cfb.h"
#include "cfbmskbits.h"

#define isClipped(c,ul,lr)  ((((c) - (ul)) | ((lr) - (c))) & ClipMask)

/* WARNING: pbox contains two shorts. This code assumes they are packed
 * and can be referenced together as an INT32.
 */

#define PointLoop(fill) { \
    for (nbox = REGION_NUM_RECTS(cclip), pbox = REGION_RECTS(cclip); \
	 --nbox >= 0; \
	 pbox++) \
    { \
	c1 = *((INT32 *) &pbox->x1) - off; \
	c2 = *((INT32 *) &pbox->x2) - off - 0x00010001; \
	for (ppt = (INT32 *) pptInit, i = npt; --i >= 0;) \
	{ \
	    pt = *ppt++; \
	    if (!isClipped(pt,c1,c2)) { \
		fill \
	    } \
	} \
    } \
}

#if PSZ == 24
# include "cfbrrop24.h"
#endif

void
cfbPolyPoint(pDrawable, pGC, mode, npt, pptInit)
    DrawablePtr pDrawable;
    GCPtr pGC;
    int mode;
    int npt;
    xPoint *pptInit;
{
    register INT32   pt;
    register INT32   c1, c2;
    register CARD32    ClipMask = 0x80008000;
    register CfbBits   xor;
#ifdef PIXEL_ADDR
    register PixelType   *addrp;
    register int    npwidth;
#if PSZ != 24
    PixelType	    *addrpt;
#endif
#else
    register CfbBits    *addrl;
    register int    nlwidth;
    register int    xoffset;
    CfbBits   *addrlt;
#endif
#if PSZ == 24
    RROP_DECLARE
    register int xtmp;
    register PixelType *p;
#endif
    register INT32  *ppt;
    RegionPtr	    cclip;
    int		    nbox;
    register int    i;
    register BoxPtr pbox;
    CfbBits   and;
    int		    rop = pGC->alu;
    int		    off;
    cfbPrivGCPtr    devPriv;
    xPoint	    *pptPrev;

    devPriv =cfbGetGCPrivate(pGC);
    rop = devPriv->rop;
    if (rop == GXnoop)
	return;
    cclip = pGC->pCompositeClip;
    xor = devPriv->xor;
    if ((mode == CoordModePrevious) && (npt > 1))
    {
	for (pptPrev = pptInit + 1, i = npt - 1; --i >= 0; pptPrev++)
	{
	    pptPrev->x += (pptPrev-1)->x;
	    pptPrev->y += (pptPrev-1)->y;
	}
    }
    off = *((int *) &pDrawable->x);
    off -= (off & 0x8000) << 1;
#ifdef PIXEL_ADDR
    cfbGetPixelWidthAndPointer(pDrawable, npwidth, addrp);
#if PSZ == 24
    addrp = addrp + pDrawable->y * npwidth;
#else
    addrp = addrp + pDrawable->y * npwidth + pDrawable->x;
#endif
    if (rop == GXcopy)
    {
#if PSZ == 24
      RROP_COPY_SETUP(xor)
#endif
	if (!(npwidth & (npwidth - 1)))
	{
	    npwidth = ffs(npwidth) - 1;
#if PSZ == 24
	    PointLoop(
		      xtmp = pDrawable->x + intToX(pt);
		      p = addrp + (intToY(pt) << npwidth) + ((xtmp * 3) >>2);
		      RROP_SOLID24_COPY(p, xtmp))
#else
	    PointLoop(*(addrp + (intToY(pt) << npwidth) + intToX(pt)) = xor;)
#endif
	}
#ifdef sun
	else if (npwidth == 1152)
	{
	    register int    y;
	    PointLoop(y = intToY(pt); *(addrp + (y << 10) + (y << 7) + intToX(pt)) = xor;)
	}
#endif
	else
	{
#if PSZ == 24
	    PointLoop(
		      xtmp = pDrawable->x + intToX(pt);
		      p = addrp + intToY(pt) * npwidth + ((xtmp * 3) >> 2);
		      RROP_SOLID24_COPY(p, xtmp))
#else
	    PointLoop(*(addrp + intToY(pt) * npwidth + intToX(pt)) = xor;)
#endif
	}
    }
    else
    {
	and = devPriv->and;
#if PSZ == 24
	RROP_SET_SETUP(xor, and)
	PointLoop(  
		  xtmp = pDrawable->x + intToX(pt);
		  p = addrp + intToY(pt) * npwidth + ((xtmp * 3) >> 2);
		  RROP_SOLID24_SET(p, xtmp))
#else
	PointLoop(  addrpt = addrp + intToY(pt) * npwidth + intToX(pt);
		    *addrpt = DoRRop (*addrpt, and, xor);)
#endif
    }
#else /* !PIXEL_ADDR */
    cfbGetLongWidthAndPointer(pDrawable, nlwidth, addrl);
    addrl = addrl + pDrawable->y * nlwidth + (pDrawable->x >> PWSH);
    xoffset = pDrawable->x & PIM;
    and = devPriv->and;
#if PSZ == 24
    PointLoop(   addrlt = addrl + intToY(pt) * nlwidth
 	                   + ((intToX(pt) + xoffset) >> PWSH);
 		   *addrlt = DoRRop (*addrlt,
 			   and | ~cfbmask[(intToX(pt) + xoffset) & PIM],
 			   xor & cfbmask[(intToX(pt) + xoffset) & PIM]);
	     )
#else
    PointLoop(   addrlt = addrl + intToY(pt) * nlwidth
 	                   + ((intToX(pt) + xoffset) >> PWSH);
 		   *addrlt = DoRRop (*addrlt,
 			   and | ~cfbmask[((intToX(pt) + xoffset) & 3)<<1],
 			   xor & cfbmask[((intToX(pt) + xoffset) & 3)<<1]);
	     )
#endif
#endif /* PIXEL_ADDR */
}