1 /*
2 Copyright (C) 1996-1997 Id Software, Inc.
3
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12
13 See the GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18
19 */
20 // gl_ngraph.c
21
22 #include "quakedef.h"
23
24 extern byte *draw_chars; // 8*8 graphic characters
25
26 int netgraphtexture; // netgraph texture
27
28 #define NET_GRAPHHEIGHT 32
29
30 static byte ngraph_texels[NET_GRAPHHEIGHT][NET_TIMINGS];
31
R_LineGraph(int x,int h)32 static void R_LineGraph (int x, int h)
33 {
34 int i;
35 int s;
36 int color;
37
38 s = NET_GRAPHHEIGHT;
39
40 if (h == 10000)
41 color = 0x6f; // yellow
42 else if (h == 9999)
43 color = 0x4f; // red
44 else if (h == 9998)
45 color = 0xd0; // blue
46 else
47 color = 0xfe; // white
48
49 if (h>s)
50 h = s;
51
52 for (i=0 ; i<h ; i++)
53 if (i & 1)
54 ngraph_texels[NET_GRAPHHEIGHT - i - 1][x] = 0xff;
55 else
56 ngraph_texels[NET_GRAPHHEIGHT - i - 1][x] = (byte)color;
57
58 for ( ; i<s ; i++)
59 ngraph_texels[NET_GRAPHHEIGHT - i - 1][x] = (byte)0xff;
60 }
61
Draw_CharToNetGraph(int x,int y,int num)62 void Draw_CharToNetGraph (int x, int y, int num)
63 {
64 int row, col;
65 byte *source;
66 int drawline;
67 int nx;
68
69 row = num>>4;
70 col = num&15;
71 source = draw_chars + (row<<10) + (col<<3);
72
73 for (drawline = 8; drawline; drawline--, y++)
74 {
75 for (nx=0 ; nx<8 ; nx++)
76 if (source[nx] != 255)
77 ngraph_texels[y][nx+x] = 0x60 + source[nx];
78 source += 128;
79 }
80 }
81
82
83 /*
84 ==============
85 R_NetGraph
86 ==============
87 */
R_NetGraph(void)88 void R_NetGraph (void)
89 {
90 int a, x, i, y;
91 int lost;
92 char st[80];
93 unsigned ngraph_pixels[NET_GRAPHHEIGHT][NET_TIMINGS];
94
95 x = 0;
96 lost = CL_CalcNet();
97 for (a=0 ; a<NET_TIMINGS ; a++)
98 {
99 i = (cls.netchan.outgoing_sequence-a) & NET_TIMINGSMASK;
100 R_LineGraph (NET_TIMINGS-1-a, packet_latency[i]);
101 }
102
103 // now load the netgraph texture into gl and draw it
104 for (y = 0; y < NET_GRAPHHEIGHT; y++)
105 for (x = 0; x < NET_TIMINGS; x++)
106 ngraph_pixels[y][x] = d_8to24table[ngraph_texels[y][x]];
107
108 x = -((vid.width - 320)>>1);
109 y = vid.height - sb_lines - 24 - NET_GRAPHHEIGHT - 1;
110
111 M_DrawTextBox (x, y, NET_TIMINGS/8, NET_GRAPHHEIGHT/8 + 1);
112 y += 8;
113
114 sprintf(st, "%3i%% packet loss", lost);
115 Draw_String(8, y, st);
116 y += 8;
117
118 GL_Bind(netgraphtexture);
119
120 glTexImage2DHelper (GL_TEXTURE_2D, 0, gl_alpha_format,
121 NET_TIMINGS, NET_GRAPHHEIGHT, 0, GL_RGBA,
122 GL_UNSIGNED_BYTE, ngraph_pixels);
123
124 glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
125 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
126 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
127
128 x = 8;
129
130 #ifdef USE_OPENGLES
131 glColor4f (1,1,1,1);
132 DrawQuad(x, y, NET_TIMINGS, NET_GRAPHHEIGHT, 0, 0, 1, 1);
133 #else
134 glColor3f (1,1,1);
135 glBegin (GL_QUADS);
136 glTexCoord2f (0, 0);
137 glVertex2f (x, y);
138 glTexCoord2f (1, 0);
139 glVertex2f (x+NET_TIMINGS, y);
140 glTexCoord2f (1, 1);
141 glVertex2f (x+NET_TIMINGS, y+NET_GRAPHHEIGHT);
142 glTexCoord2f (0, 1);
143 glVertex2f (x, y+NET_GRAPHHEIGHT);
144 glEnd ();
145 #endif
146 }
147
148