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authorKaleb Keithley <kaleb@freedesktop.org>2003-11-14 15:54:54 +0000
committerKaleb Keithley <kaleb@freedesktop.org>2003-11-14 15:54:54 +0000
commitded6147bfb5d75ff1e67c858040a628b61bc17d1 (patch)
tree82355105e93cdac89ef7d987424351c77545faf0 /cfb/cfbbres.c
parentcb6ef07bf01e72d1a6e6e83ceb7f76d6534da941 (diff)
R6.6 is the Xorg base-lineXORG-MAIN
Diffstat (limited to 'cfb/cfbbres.c')
-rw-r--r--cfb/cfbbres.c233
1 files changed, 233 insertions, 0 deletions
diff --git a/cfb/cfbbres.c b/cfb/cfbbres.c
new file mode 100644
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+++ 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
+}