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/*
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 ();
}
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