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diff --git a/nx-X11/programs/Xserver/fb/fbedgeimp.h b/nx-X11/programs/Xserver/fb/fbedgeimp.h
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+/*
+ * $Id: fbedgeimp.h,v 1.4 2005/08/30 03:05:21 anholt Exp $
+ *
+ * Copyright © 2004 Keith Packard
+ *
+ * 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, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission. Keith Packard makes no
+ * representations about the suitability of this software for any purpose. It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD 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.
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#ifndef rasterizeSpan
+#endif
+
+static void
+rasterizeEdges (FbBits *buf,
+ int width,
+ int stride,
+ RenderEdge *l,
+ RenderEdge *r,
+ xFixed t,
+ xFixed b)
+{
+ xFixed y = t;
+ FbBits *line;
+
+ line = buf + xFixedToInt (y) * stride;
+
+ for (;;)
+ {
+ xFixed lx, rx;
+ int lxi, rxi;
+
+ /* clip X */
+ lx = l->x;
+ if (lx < 0)
+ lx = 0;
+ rx = r->x;
+ if (xFixedToInt (rx) >= width)
+ rx = IntToxFixed (width);
+
+ /* Skip empty (or backwards) sections */
+ if (rx > lx)
+ {
+
+ /* Find pixel bounds for span */
+ lxi = xFixedToInt (lx);
+ rxi = xFixedToInt (rx);
+
+#if N_BITS == 1
+ {
+ FbBits *a = line;
+ FbBits startmask, endmask;
+ int nmiddle;
+ int width = rxi - lxi;
+ int x = lxi;
+
+ a += x >> FB_SHIFT;
+ x &= FB_MASK;
+
+ FbMaskBits (x, width, startmask, nmiddle, endmask);
+ if (startmask)
+ *a++ |= startmask;
+ while (nmiddle--)
+ *a++ = FB_ALLONES;
+ if (endmask)
+ *a |= endmask;
+ }
+#else
+ {
+ DefineAlpha(line,lxi);
+ int lxs, rxs;
+
+ /* Sample coverage for edge pixels */
+ lxs = RenderSamplesX (lx, N_BITS);
+ rxs = RenderSamplesX (rx, N_BITS);
+
+ /* Add coverage across row */
+ if (lxi == rxi)
+ {
+ AddAlpha (rxs - lxs);
+ }
+ else
+ {
+ int xi;
+
+ AddAlpha (N_X_FRAC(N_BITS) - lxs);
+ StepAlpha;
+ for (xi = lxi + 1; xi < rxi; xi++)
+ {
+ AddAlpha (N_X_FRAC(N_BITS));
+ StepAlpha;
+ }
+ /* Do not add in a 0 alpha here. This check is necessary
+ * to avoid a buffer overrun when rx is exactly on a pixel
+ * boundary.
+ */
+ if (rxs != 0)
+ AddAlpha (rxs);
+ }
+ }
+#endif
+ }
+
+ if (y == b)
+ break;
+
+#if N_BITS > 1
+ if (xFixedFrac (y) != Y_FRAC_LAST(N_BITS))
+ {
+ RenderEdgeStepSmall (l);
+ RenderEdgeStepSmall (r);
+ y += STEP_Y_SMALL(N_BITS);
+ }
+ else
+#endif
+ {
+ RenderEdgeStepBig (l);
+ RenderEdgeStepBig (r);
+ y += STEP_Y_BIG(N_BITS);
+ line += stride;
+ }
+ }
+}
+
+#undef rasterizeSpan