The Quake sources as originally release under the GPL license on December 21, 1999

1 files changed, 141 insertions, 0 deletions

diff --git a/QW/client/gl_ngraph.c b/QW/client/gl_ngraph.c
new file mode 100644
index 0000000..29d1096
--- /dev/null
+++ b/QW/client/gl_ngraph.c
@@ -0,0 +1,141 @@
+/*
+Copyright (C) 1996-1997 Id Software, Inc.
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
+
+See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+// gl_ngraph.c
+
+#include "quakedef.h"
+
+extern byte		*draw_chars;				// 8*8 graphic characters
+
+int	netgraphtexture;	// netgraph texture
+
+#define NET_GRAPHHEIGHT 32
+
+static	byte ngraph_texels[NET_GRAPHHEIGHT][NET_TIMINGS];
+
+static void R_LineGraph (int x, int h)
+{
+	int		i;
+	int		s;
+	int		color;
+
+	s = NET_GRAPHHEIGHT;
+
+	if (h == 10000)
+		color = 0x6f;	// yellow
+	else if (h == 9999)
+		color = 0x4f;	// red
+	else if (h == 9998)
+		color = 0xd0;	// blue
+	else
+		color = 0xfe;	// white
+
+	if (h>s)
+		h = s;
+	
+	for (i=0 ; i<h ; i++)
+		if (i & 1)
+			ngraph_texels[NET_GRAPHHEIGHT - i - 1][x] = 0xff;
+		else
+			ngraph_texels[NET_GRAPHHEIGHT - i - 1][x] = (byte)color;
+
+	for ( ; i<s ; i++)
+		ngraph_texels[NET_GRAPHHEIGHT - i - 1][x] = (byte)0xff;
+}
+
+void Draw_CharToNetGraph (int x, int y, int num)
+{
+	int		row, col;
+	byte	*source;
+	int		drawline;
+	int		nx;
+
+	row = num>>4;
+	col = num&15;
+	source = draw_chars + (row<<10) + (col<<3);
+
+	for (drawline = 8; drawline; drawline--, y++)
+	{
+		for (nx=0 ; nx<8 ; nx++)
+			if (source[nx] != 255)
+				ngraph_texels[y][nx+x] = 0x60 + source[nx];
+		source += 128;
+	}
+}
+
+
+/*
+==============
+R_NetGraph
+==============
+*/
+void R_NetGraph (void)
+{
+	int		a, x, i, y;
+	int lost;
+	char st[80];
+	unsigned	ngraph_pixels[NET_GRAPHHEIGHT][NET_TIMINGS];
+
+	x = 0;
+	lost = CL_CalcNet();
+	for (a=0 ; a<NET_TIMINGS ; a++)
+	{
+		i = (cls.netchan.outgoing_sequence-a) & NET_TIMINGSMASK;
+		R_LineGraph (NET_TIMINGS-1-a, packet_latency[i]);
+	}
+
+	// now load the netgraph texture into gl and draw it
+	for (y = 0; y < NET_GRAPHHEIGHT; y++)
+		for (x = 0; x < NET_TIMINGS; x++)
+			ngraph_pixels[y][x] = d_8to24table[ngraph_texels[y][x]];
+
+	x =	-((vid.width - 320)>>1);
+	y = vid.height - sb_lines - 24 - NET_GRAPHHEIGHT - 1;
+
+	M_DrawTextBox (x, y, NET_TIMINGS/8, NET_GRAPHHEIGHT/8 + 1);
+	y += 8;
+
+	sprintf(st, "%3i%% packet loss", lost);
+	Draw_String(8, y, st);
+	y += 8;
+	
+    GL_Bind(netgraphtexture);
+
+	glTexImage2D (GL_TEXTURE_2D, 0, gl_alpha_format, 
+		NET_TIMINGS, NET_GRAPHHEIGHT, 0, GL_RGBA, 
+		GL_UNSIGNED_BYTE, ngraph_pixels);
+
+	glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+	x = 8;
+	glColor3f (1,1,1);
+	glBegin (GL_QUADS);
+	glTexCoord2f (0, 0);
+	glVertex2f (x, y);
+	glTexCoord2f (1, 0);
+	glVertex2f (x+NET_TIMINGS, y);
+	glTexCoord2f (1, 1);
+	glVertex2f (x+NET_TIMINGS, y+NET_GRAPHHEIGHT);
+	glTexCoord2f (0, 1);
+	glVertex2f (x, y+NET_GRAPHHEIGHT);
+	glEnd ();
+}
+