Imported nx-X11-3.3.0-5.tar.gznx-X11/3.3.0-5

Summary: Imported nx-X11-3.3.0-5.tar.gz
Keywords:

Imported nx-X11-3.3.0-5.tar.gz
into Git repository

1 files changed, 202 insertions, 0 deletions

diff --git a/nx-X11/programs/Xserver/render/renderedge.c.NX.original b/nx-X11/programs/Xserver/render/renderedge.c.NX.original
new file mode 100644
index 000000000..f095038e5
--- /dev/null
+++ b/nx-X11/programs/Xserver/render/renderedge.c.NX.original
@@ -0,0 +1,202 @@
+/*
+ * $Id: renderedge.c,v 1.4 2005/07/03 07:02:08 daniels 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
+
+#include "renderedge.h"
+
+/*
+ * Compute the smallest value no less than y which is on a
+ * grid row
+ */
+
+xFixed
+RenderSampleCeilY (xFixed y, int n)
+{
+    xFixed   f = xFixedFrac(y);
+    xFixed   i = xFixedFloor(y);
+    
+    f = ((f + Y_FRAC_FIRST(n)) / STEP_Y_SMALL(n)) * STEP_Y_SMALL(n) + Y_FRAC_FIRST(n);
+    if (f > Y_FRAC_LAST(n))
+    {
+	f = Y_FRAC_FIRST(n);
+	i += xFixed1;
+    }
+    return (i | f);
+}
+
+#define _div(a,b)    ((a) >= 0 ? (a) / (b) : -((-(a) + (b) - 1) / (b)))
+
+/*
+ * Compute the largest value no greater than y which is on a
+ * grid row
+ */
+xFixed
+RenderSampleFloorY (xFixed y, int n)
+{
+    xFixed   f = xFixedFrac(y);
+    xFixed   i = xFixedFloor (y);
+    
+    f = _div(f - Y_FRAC_FIRST(n), STEP_Y_SMALL(n)) * STEP_Y_SMALL(n) + Y_FRAC_FIRST(n);
+    if (f < Y_FRAC_FIRST(n))
+    {
+	f = Y_FRAC_LAST(n);
+	i -= xFixed1;
+    }
+    return (i | f);
+}
+
+/*
+ * Step an edge by any amount (including negative values)
+ */
+void
+RenderEdgeStep (RenderEdge *e, int n)
+{
+    xFixed_48_16	ne;
+
+    e->x += n * e->stepx;
+    
+    ne = e->e + n * (xFixed_48_16) e->dx;
+    
+    if (n >= 0)
+    {
+	if (ne > 0)
+	{
+	    int nx = (ne + e->dy - 1) / e->dy;
+	    e->e = ne - nx * (xFixed_48_16) e->dy;
+	    e->x += nx * e->signdx;
+	}
+    }
+    else
+    {
+	if (ne <= -e->dy)
+	{
+	    int nx = (-ne) / e->dy;
+	    e->e = ne + nx * (xFixed_48_16) e->dy;
+	    e->x -= nx * e->signdx;
+	}
+    }
+}
+
+/*
+ * A private routine to initialize the multi-step
+ * elements of an edge structure
+ */
+static void
+_RenderEdgeMultiInit (RenderEdge *e, int n, xFixed *stepx_p, xFixed *dx_p)
+{
+    xFixed	stepx;
+    xFixed_48_16	ne;
+    
+    ne = n * (xFixed_48_16) e->dx;
+    stepx = n * e->stepx;
+    if (ne > 0)
+    {
+	int nx = ne / e->dy;
+	ne -= nx * e->dy;
+	stepx += nx * e->signdx;
+    }
+    *dx_p = ne;
+    *stepx_p = stepx;
+}
+
+/*
+ * Initialize one edge structure given the line endpoints and a
+ * starting y value
+ */
+void
+RenderEdgeInit (RenderEdge	*e,
+		int		n,
+		xFixed		y_start,
+		xFixed		x_top,
+		xFixed		y_top,
+		xFixed		x_bot,
+		xFixed		y_bot)
+{
+    xFixed	dx, dy;
+
+    e->x = x_top;
+    e->e = 0;
+    dx = x_bot - x_top;
+    dy = y_bot - y_top;
+    e->dy = dy;
+    e->dx = 0;
+    if (dy)
+    {
+	if (dx >= 0)
+	{
+	    e->signdx = 1;
+	    e->stepx = dx / dy;
+	    e->dx = dx % dy;
+	    e->e = -dy;
+	}
+	else
+	{
+	    e->signdx = -1;
+	    e->stepx = -(-dx / dy);
+	    e->dx = -dx % dy;
+	    e->e = 0;
+	}
+    
+	_RenderEdgeMultiInit (e, STEP_Y_SMALL(n), &e->stepx_small, &e->dx_small);
+	_RenderEdgeMultiInit (e, STEP_Y_BIG(n), &e->stepx_big, &e->dx_big);
+    }
+    RenderEdgeStep (e, y_start - y_top);
+}
+
+/*
+ * Initialize one edge structure given a line, starting y value
+ * and a pixel offset for the line
+ */
+void
+RenderLineFixedEdgeInit (RenderEdge *e,
+			 int	    n,
+			 xFixed	    y,
+			 xLineFixed *line,
+			 int	    x_off,
+			 int	    y_off)
+{
+    xFixed	x_off_fixed = IntToxFixed(x_off);
+    xFixed	y_off_fixed = IntToxFixed(y_off);
+    xPointFixed	*top, *bot;
+
+    if (line->p1.y <= line->p2.y)
+    {
+	top = &line->p1;
+	bot = &line->p2;
+    }
+    else
+    {
+	top = &line->p2;
+	bot = &line->p1;
+    }
+    RenderEdgeInit (e, n, y,
+		    top->x + x_off_fixed,
+		    top->y + y_off_fixed,
+		    bot->x + x_off_fixed,
+		    bot->y + y_off_fixed);
+}
+