added rampsize parameter to BuildGammaTable8 and 16
[divverent/darkplaces.git] / palette.c
1
2 #include "quakedef.h"
3
4 unsigned int palette_complete[256];
5 unsigned int palette_font[256];
6 unsigned int palette_alpha[256];
7 unsigned int palette_nocolormap[256];
8 unsigned int palette_nocolormapnofullbrights[256];
9 unsigned int palette_nofullbrights[256];
10 unsigned int palette_onlyfullbrights[256];
11 unsigned int palette_pantsaswhite[256];
12 unsigned int palette_shirtaswhite[256];
13 unsigned int palette_transparent[256];
14
15 // John Carmack said the quake palette.lmp can be considered public domain because it is not an important asset to id, so I include it here as a fallback if no external palette file is found.
16 unsigned char host_quakepal[768] =
17 {
18 0,0,0,15,15,15,31,31,31,47,47,47,63,63,63,75,75,75,91,91,91,107,107,107,123,123,123,139,139,139,155,155,155,171,171,171,187,187,187,203,203,203,219,219,219,235,235,235,15,11,7,23,15,11,31,23,11,39,27,15,47,35,19,55,43,23,63,47,23,75,55,27,83,59,27,91,67,31,99,75,31,107,83,31,115,87,31,123,95,35,131,103,35,143,111,35,11,11,15,19,19,27,27,27,39,39,39,51,47,47,63,55,55,75,63,63,87,71,71,103,79,79,115,91,91,127,99,99,
19 139,107,107,151,115,115,163,123,123,175,131,131,187,139,139,203,0,0,0,7,7,0,11,11,0,19,19,0,27,27,0,35,35,0,43,43,7,47,47,7,55,55,7,63,63,7,71,71,7,75,75,11,83,83,11,91,91,11,99,99,11,107,107,15,7,0,0,15,0,0,23,0,0,31,0,0,39,0,0,47,0,0,55,0,0,63,0,0,71,0,0,79,0,0,87,0,0,95,0,0,103,0,0,111,0,0,119,0,0,127,0,0,19,19,0,27,27,0,35,35,0,47,43,0,55,47,0,67,
20 55,0,75,59,7,87,67,7,95,71,7,107,75,11,119,83,15,131,87,19,139,91,19,151,95,27,163,99,31,175,103,35,35,19,7,47,23,11,59,31,15,75,35,19,87,43,23,99,47,31,115,55,35,127,59,43,143,67,51,159,79,51,175,99,47,191,119,47,207,143,43,223,171,39,239,203,31,255,243,27,11,7,0,27,19,0,43,35,15,55,43,19,71,51,27,83,55,35,99,63,43,111,71,51,127,83,63,139,95,71,155,107,83,167,123,95,183,135,107,195,147,123,211,163,139,227,179,151,
21 171,139,163,159,127,151,147,115,135,139,103,123,127,91,111,119,83,99,107,75,87,95,63,75,87,55,67,75,47,55,67,39,47,55,31,35,43,23,27,35,19,19,23,11,11,15,7,7,187,115,159,175,107,143,163,95,131,151,87,119,139,79,107,127,75,95,115,67,83,107,59,75,95,51,63,83,43,55,71,35,43,59,31,35,47,23,27,35,19,19,23,11,11,15,7,7,219,195,187,203,179,167,191,163,155,175,151,139,163,135,123,151,123,111,135,111,95,123,99,83,107,87,71,95,75,59,83,63,
22 51,67,51,39,55,43,31,39,31,23,27,19,15,15,11,7,111,131,123,103,123,111,95,115,103,87,107,95,79,99,87,71,91,79,63,83,71,55,75,63,47,67,55,43,59,47,35,51,39,31,43,31,23,35,23,15,27,19,11,19,11,7,11,7,255,243,27,239,223,23,219,203,19,203,183,15,187,167,15,171,151,11,155,131,7,139,115,7,123,99,7,107,83,0,91,71,0,75,55,0,59,43,0,43,31,0,27,15,0,11,7,0,0,0,255,11,11,239,19,19,223,27,27,207,35,35,191,43,
23 43,175,47,47,159,47,47,143,47,47,127,47,47,111,47,47,95,43,43,79,35,35,63,27,27,47,19,19,31,11,11,15,43,0,0,59,0,0,75,7,0,95,7,0,111,15,0,127,23,7,147,31,7,163,39,11,183,51,15,195,75,27,207,99,43,219,127,59,227,151,79,231,171,95,239,191,119,247,211,139,167,123,59,183,155,55,199,195,55,231,227,87,127,191,255,171,231,255,215,255,255,103,0,0,139,0,0,179,0,0,215,0,0,255,0,0,255,243,147,255,247,199,255,255,255,159,91,83
24 };
25
26 void Palette_SetupSpecialPalettes(void)
27 {
28         int i;
29         int fullbright_start, fullbright_end;
30         int pants_start, pants_end;
31         int shirt_start, shirt_end;
32         int reversed_start, reversed_end;
33         int transparentcolor;
34         unsigned char *colormap;
35         fs_offset_t filesize;
36
37         colormap = FS_LoadFile("gfx/colormap.lmp", tempmempool, true, &filesize);
38         if (colormap && filesize >= 16385)
39                 fullbright_start = 256 - colormap[16384];
40         else
41                 fullbright_start = 256;
42         if (colormap)
43                 Mem_Free(colormap);
44         fullbright_end = 256;
45         pants_start = 96;
46         pants_end = 112;
47         shirt_start = 16;
48         shirt_end = 32;
49         reversed_start = 128;
50         reversed_end = 224;
51         transparentcolor = 255;
52
53         for (i = 0;i < 256;i++)
54                 palette_transparent[i] = palette_complete[i];
55         palette_transparent[transparentcolor] = 0;
56
57         for (i = 0;i < fullbright_start;i++)
58                 palette_nofullbrights[i] = palette_complete[i];
59         for (i = fullbright_start;i < fullbright_end;i++)
60                 palette_nofullbrights[i] = palette_complete[0];
61
62         for (i = 0;i < 256;i++)
63                 palette_onlyfullbrights[i] = palette_complete[0];
64         for (i = fullbright_start;i < fullbright_end;i++)
65                 palette_onlyfullbrights[i] = palette_complete[i];
66
67         for (i = 0;i < 256;i++)
68                 palette_nocolormapnofullbrights[i] = palette_complete[i];
69         for (i = pants_start;i < pants_end;i++)
70                 palette_nocolormapnofullbrights[i] = palette_complete[0];
71         for (i = shirt_start;i < shirt_end;i++)
72                 palette_nocolormapnofullbrights[i] = palette_complete[0];
73         for (i = fullbright_start;i < fullbright_end;i++)
74                 palette_nocolormapnofullbrights[i] = palette_complete[0];
75
76         for (i = 0;i < 256;i++)
77                 palette_nocolormap[i] = palette_complete[i];
78         for (i = pants_start;i < pants_end;i++)
79                 palette_nocolormap[i] = palette_complete[0];
80         for (i = shirt_start;i < shirt_end;i++)
81                 palette_nocolormap[i] = palette_complete[0];
82
83         for (i = 0;i < 256;i++)
84                 palette_pantsaswhite[i] = palette_complete[0];
85         for (i = pants_start;i < pants_end;i++)
86         {
87                 if (i >= reversed_start && i < reversed_end)
88                         palette_pantsaswhite[i] = palette_complete[15 - (i - pants_start)];
89                 else
90                         palette_pantsaswhite[i] = palette_complete[i - pants_start];
91         }
92
93         for (i = 0;i < 256;i++)
94                 palette_shirtaswhite[i] = palette_complete[0];
95         for (i = shirt_start;i < shirt_end;i++)
96         {
97                 if (i >= reversed_start && i < reversed_end)
98                         palette_shirtaswhite[i] = palette_complete[15 - (i - shirt_start)];
99                 else
100                         palette_shirtaswhite[i] = palette_complete[i - shirt_start];
101         }
102
103         for (i = 0;i < 256;i++)
104                 palette_alpha[i] = 0xFFFFFFFF;
105         palette_alpha[transparentcolor] = 0;
106
107         for (i = 0;i < 256;i++)
108                 palette_font[i] = palette_complete[i];
109         palette_font[0] = 0;
110 }
111
112 void BuildGammaTable8(float prescale, float gamma, float scale, float base, unsigned char *out, int rampsize)
113 {
114         int i, adjusted;
115         double invgamma;
116
117         invgamma = 1.0 / gamma;
118         prescale /= (double) (rampsize - 1);
119         for (i = 0;i < rampsize;i++)
120         {
121                 adjusted = (int) (255.0 * (pow((double) i * prescale, invgamma) * scale + base) + 0.5);
122                 out[i] = bound(0, adjusted, 255);
123         }
124 }
125
126 void BuildGammaTable16(float prescale, float gamma, float scale, float base, unsigned short *out, int rampsize)
127 {
128         int i, adjusted;
129         double invgamma;
130
131         invgamma = 1.0 / gamma;
132         prescale /= (double) (rampsize - 1);
133         for (i = 0;i < rampsize;i++)
134         {
135                 adjusted = (int) (65535.0 * (pow((double) i * prescale, invgamma) * scale + base) + 0.5);
136                 out[i] = bound(0, adjusted, 65535);
137         }
138 }
139
140 void Palette_Init(void)
141 {
142         int i;
143         float gamma, scale, base;
144         fs_offset_t filesize;
145         unsigned char *in, *out, *palfile;
146         unsigned char texturegammaramp[256];
147
148         gamma = 1;
149         scale = 1;
150         base = 0;
151 // COMMANDLINEOPTION: Client: -texgamma <number> sets the quake palette gamma, allowing you to make quake textures brighter/darker, not recommended
152         i = COM_CheckParm("-texgamma");
153         if (i)
154                 gamma = atof(com_argv[i + 1]);
155 // COMMANDLINEOPTION: Client: -texcontrast <number> sets the quake palette contrast, allowing you to make quake textures brighter/darker, not recommended
156         i = COM_CheckParm("-texcontrast");
157         if (i)
158                 scale = atof(com_argv[i + 1]);
159 // COMMANDLINEOPTION: Client: -texbrightness <number> sets the quake palette brightness (brightness of black), allowing you to make quake textures brighter/darker, not recommended
160         i = COM_CheckParm("-texbrightness");
161         if (i)
162                 base = atof(com_argv[i + 1]);
163         gamma = bound(0.01, gamma, 10.0);
164         scale = bound(0.01, scale, 10.0);
165         base = bound(0, base, 0.95);
166
167         BuildGammaTable8(1.0f, gamma, scale, base, texturegammaramp, 256);
168
169         palfile = (unsigned char *)FS_LoadFile ("gfx/palette.lmp", tempmempool, false, &filesize);
170         if (palfile && filesize >= 768)
171                 in = palfile;
172         else
173         {
174                 Con_DPrint("Couldn't load gfx/palette.lmp, falling back on internal palette\n");
175                 in = host_quakepal;
176         }
177         out = (unsigned char *) palette_complete; // palette is accessed as 32bit for speed reasons, but is created as 8bit bytes
178         for (i = 0;i < 256;i++)
179         {
180                 *out++ = texturegammaramp[*in++];
181                 *out++ = texturegammaramp[*in++];
182                 *out++ = texturegammaramp[*in++];
183                 *out++ = 255;
184         }
185         if (palfile)
186                 Mem_Free(palfile);
187
188         Palette_SetupSpecialPalettes();
189 }
190