R6.6 is the Xorg base-lineXORG-MAIN

1 files changed, 233 insertions, 0 deletions

diff --git a/cfb/cfbbres.c b/cfb/cfbbres.c
new file mode 100644
index 000000000..139a868b7
--- /dev/null
+++ b/cfb/cfbbres.c
@@ -0,0 +1,233 @@
+/***********************************************************
+
+Copyright 1987, 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.
+
+
+Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its 
+documentation for any purpose and without fee is hereby granted, 
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in 
+supporting documentation, and that the name of Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.  
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+******************************************************************/
+/* $Xorg: cfbbres.c,v 1.4 2001/02/09 02:04:37 xorgcvs Exp $ */
+#include "X.h"
+#include "misc.h"
+#include "cfb.h"
+#include "cfbmskbits.h"
+#include "servermd.h"
+#include "miline.h"
+
+/* Solid bresenham line */
+/* NOTES
+   e2 is used less often than e1, so it's not in a register
+*/
+
+void
+cfbBresS(rop, and, xor, addrl, nlwidth, signdx, signdy, axis, x1, y1, e, e1,
+	 e2, len)
+    int		    rop;
+    unsigned long   and, xor;
+    unsigned long   *addrl;		/* pointer to base of bitmap */
+    int		    nlwidth;		/* width in longwords of bitmap */
+    register int    signdx;
+    int		    signdy;		/* signs of directions */
+    int		    axis;		/* major axis (Y_AXIS or X_AXIS) */
+    int		    x1, y1;		/* initial point */
+    register int    e;			/* error accumulator */
+    register int    e1;			/* bresenham increments */
+    int		    e2;
+    int		    len;		/* length of line */
+{
+    register int	e3 = e2-e1;
+#ifdef PIXEL_ADDR
+    register PixelType	*addrp;		/* Pixel pointer */
+
+    if (len == 0)
+    	return;
+    /* point to first point */
+    nlwidth <<= PWSH;
+    addrp = (PixelType *)(addrl) + (y1 * nlwidth) + x1;
+    if (signdy < 0)
+    	nlwidth = -nlwidth;
+    e = e-e1;			/* to make looping easier */
+    
+    if (axis == Y_AXIS)
+    {
+	int	t;
+
+	t = nlwidth;
+	nlwidth = signdx;
+	signdx = t;
+    }
+    if (rop == GXcopy)
+    {
+	--len;
+#define body {\
+	    *addrp = xor; \
+	    addrp += signdx; \
+	    e += e1; \
+	    if (e >= 0) \
+	    { \
+		addrp += nlwidth; \
+		e += e3; \
+	    } \
+	}
+	while (len >= 4)
+	{
+	    body body body body
+	    len -= 4;
+	}
+	switch (len)
+	{
+	case  3: body case  2: body case  1: body
+	}
+#undef body
+	*addrp = xor;
+    }
+    else /* not GXcopy */
+    {
+	while(len--)
+	{ 
+	    *addrp = DoRRop (*addrp, and, xor);
+	    e += e1;
+	    if (e >= 0)
+	    {
+		addrp += nlwidth;
+		e += e3;
+	    }
+	    addrp += signdx;
+	}
+    }
+#else /* !PIXEL_ADDR */
+    register unsigned long   tmp, bit;
+    unsigned long leftbit, rightbit;
+
+    /* point to longword containing first point */
+    addrl = (addrl + (y1 * nlwidth) + (x1 >> PWSH));
+    if (signdy < 0)
+	    nlwidth = -nlwidth;
+    e = e-e1;			/* to make looping easier */
+
+    leftbit = cfbmask[0];
+    rightbit = cfbmask[PPW-1];
+    bit = cfbmask[x1 & PIM];
+
+    if (axis == X_AXIS)
+    {
+	if (signdx > 0)
+	{
+	    while (len--)
+	    { 
+		*addrl = DoMaskRRop (*addrl, and, xor, bit);
+		bit = SCRRIGHT(bit,1);
+		e += e1;
+		if (e >= 0)
+		{
+		    addrl += nlwidth;
+		    e += e3;
+		}
+		if (!bit)
+		{
+		    bit = leftbit;
+		    addrl++;
+		}
+	    }
+	}
+	else
+	{
+	    while (len--)
+	    { 
+		*addrl = DoMaskRRop (*addrl, and, xor, bit);
+		e += e1;
+		bit = SCRLEFT(bit,1);
+		if (e >= 0)
+		{
+		    addrl += nlwidth;
+		    e += e3;
+		}
+		if (!bit)
+		{
+		    bit = rightbit;
+		    addrl--;
+		}
+	    }
+	}
+    } /* if X_AXIS */
+    else
+    {
+	if (signdx > 0)
+	{
+	    while(len--)
+	    {
+		*addrl = DoMaskRRop (*addrl, and, xor, bit);
+		e += e1;
+		if (e >= 0)
+		{
+		    bit = SCRRIGHT(bit,1);
+		    if (!bit)
+		    {
+			bit = leftbit;
+			addrl++;
+		    }
+		    e += e3;
+		}
+		addrl += nlwidth;
+	    }
+	}
+	else
+	{
+	    while(len--)
+	    {
+		*addrl = DoMaskRRop (*addrl, and, xor, bit);
+		e += e1;
+		if (e >= 0)
+		{
+		    bit = SCRLEFT(bit,1);
+		    if (!bit)
+		    {
+			bit = rightbit;
+			addrl--;
+		    }
+		    e += e3;
+		}
+		addrl += nlwidth;
+	    }
+	}
+    } /* else Y_AXIS */
+#endif
+}