--- /dev/null
+/***********************************************************
+
+Copyright (c) 1987 X Consortium
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+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
+X CONSORTIUM 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 X Consortium 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 X Consortium.
+
+
+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.
+
+******************************************************************/
+/* $XConsortium: cfbbres.c,v 1.15 94/04/17 20:28:45 dpw Exp $ */
+/* $XFree86: xc/programs/Xserver/cfb/cfbbres.c,v 3.1 1996/08/25 14:05:40 dawes 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;
+#if PSZ == 24
+ unsigned long piQxelXor[3],piQxelAnd[3];
+ char *addrb;
+ int nlwidth3, signdx3;
+#endif
+#ifdef PIXEL_ADDR
+ register PixelType *addrp; /* Pixel pointer */
+
+ if (len == 0)
+ return;
+ /* point to first point */
+ nlwidth <<= PWSH;
+#if PSZ == 24
+ addrp = (PixelType *)(addrl) + (y1 * nlwidth);
+ addrb = (char *)addrp + x1 * 3;
+
+ piQxelXor[0] = (xor << 24) | xor;
+ piQxelXor[1] = (xor << 16)| (xor >> 8);
+ piQxelXor[2] = (xor << 8) | (xor >> 16);
+ piQxelAnd[0] = (and << 24) | and;
+ piQxelAnd[1] = (and << 16)| (and >> 8);
+ piQxelAnd[2] = (and << 8) | (and >> 16);
+#else
+ addrp = (PixelType *)(addrl) + (y1 * nlwidth) + x1;
+#endif
+ if (signdy < 0)
+ nlwidth = -nlwidth;
+ e = e-e1; /* to make looping easier */
+#if PSZ == 24
+ nlwidth3 = nlwidth * sizeof (long);
+ signdx3 = signdx * 3;
+#endif
+
+ if (axis == Y_AXIS)
+ {
+ int t;
+
+ t = nlwidth;
+ nlwidth = signdx;
+ signdx = t;
+#if PSZ == 24
+ t = nlwidth3;
+ nlwidth3 = signdx3;
+ signdx3 = t;
+#endif
+ }
+ if (rop == GXcopy)
+ {
+ --len;
+#if PSZ == 24
+#define body_copy \
+ addrp = (PixelType *)((unsigned long)addrb & ~0x03); \
+ switch((unsigned long)addrb & 3){ \
+ case 0: \
+ *addrp = ((*addrp)&0xFF000000)|(piQxelXor[0] & 0xFFFFFF); \
+ break; \
+ case 1: \
+ *addrp = ((*addrp)&0xFF)|(piQxelXor[2] & 0xFFFFFF00); \
+ break; \
+ case 3: \
+ *addrp = ((*addrp)&0xFFFFFF)|(piQxelXor[0] & 0xFF000000); \
+ *(addrp+1) = ((*(addrp+1))&0xFFFF0000)|(piQxelXor[1] & 0xFFFF); \
+ break; \
+ case 2: \
+ *addrp = ((*addrp)&0xFFFF)|(piQxelXor[1] & 0xFFFF0000); \
+ *(addrp+1) = ((*(addrp+1))&0xFFFFFF00)|(piQxelXor[2] & 0xFF); \
+ break; \
+ }
+#define body {\
+ body_copy \
+ addrb += signdx3; \
+ e += e1; \
+ if (e >= 0) \
+ { \
+ addrb += nlwidth3; \
+ e += e3; \
+ } \
+ }
+#else /* PSZ == 24 */
+#define body {\
+ *addrp = xor; \
+ addrp += signdx; \
+ e += e1; \
+ if (e >= 0) \
+ { \
+ addrp += nlwidth; \
+ e += e3; \
+ } \
+ }
+#endif /* PSZ == 24 */
+ while (len >= 4)
+ {
+ body body body body
+ len -= 4;
+ }
+ switch (len)
+ {
+ case 3: body case 2: body case 1: body
+ }
+#undef body
+#if PSZ == 24
+ body_copy
+# undef body_copy
+#else
+ *addrp = xor;
+#endif
+ }
+ else /* not GXcopy */
+ {
+ while(len--)
+ {
+#if PSZ == 24
+ addrp = (PixelType *)((unsigned long)addrb & ~0x03);
+ switch((unsigned long)addrb & 3){
+ case 0:
+ *addrp = (*addrp & (piQxelAnd[0]|0xFF000000))
+ ^ (piQxelXor[0] & 0xFFFFFF);
+ break;
+ case 1:
+ *addrp = (*addrp & (piQxelAnd[2]|0xFF))
+ ^ (piQxelXor[2] & 0xFFFFFF00);
+ break;
+ case 3:
+ *addrp = (*addrp & (piQxelAnd[0]|0xFFFFFF))
+ ^ (piQxelXor[0] & 0xFF000000);
+ *(addrp+1) = (*(addrp+1) & (piQxelAnd[1]|0xFFFF0000))
+ ^ (piQxelXor[1] & 0xFFFF);
+ break;
+ case 2:
+ *addrp = (*addrp & (piQxelAnd[1]|0xFFFF))
+ ^ (piQxelXor[1] & 0xFFFF0000);
+ *(addrp+1) = (*(addrp+1) & (piQxelAnd[2]|0xFFFFFF00))
+ ^ (piQxelXor[2] & 0xFF);
+ break;
+ }
+ e += e1;
+ if (e >= 0)
+ {
+ addrb += nlwidth3;
+ e += e3;
+ }
+ addrb += signdx3;
+#else /* PSZ == 24 */
+ *addrp = DoRRop (*addrp, and, xor);
+ e += e1;
+ if (e >= 0)
+ {
+ addrp += nlwidth;
+ e += e3;
+ }
+ addrp += signdx;
+#endif /* PSZ == 24 */
+ }
+ }
+#else /* !PIXEL_ADDR */
+ register unsigned long tmp, bit;
+ unsigned long leftbit, rightbit;
+
+ /* point to longword containing first point */
+#if PSZ == 24
+ addrl = (addrl + (y1 * nlwidth) + ((x1 * 3) >>2);
+#else
+ addrl = (addrl + (y1 * nlwidth) + (x1 >> PWSH));
+#endif
+ if (signdy < 0)
+ nlwidth = -nlwidth;
+ e = e-e1; /* to make looping easier */
+
+ leftbit = cfbmask[0];
+#if PSZ == 24
+ rightbit = cfbmask[(PPW-1)<<1];
+ bit = cfbmask[(x1 & 3)<<1];
+#else
+ rightbit = cfbmask[PPW-1];
+ bit = cfbmask[x1 & PIM];
+#endif
+
+ 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
+}
projects / rdpsrv / blobdiff