1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/*
* Descent 3
* Copyright (C) 2024 Parallax Software
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef LIGHTMAP_H
#define LIGHTMAP_H
#include "pstypes.h"
#define MAX_LIGHTMAPS (65534)
#define BAD_LM_INDEX 65535
// lightmap flags
#define LF_CHANGED 1 // this bitmap has changed since last frame (useful for hardware cacheing)
#define LF_LIMITS 2 // This lightmap has a specific area that has changed since last frame
#define LF_WRAP 4 // This lightmap should be drawn with wrapping (not clamping)
#define LF_BRAND_NEW 8 // This lightmap is brand new and hasn't been to the video card yet
struct bms_lightmap {
uint8_t width, height; // Width and height in pixels
uint16_t *data; // 16bit data
uint16_t used;
uint8_t flags;
int16_t cache_slot; // for the renderers use
uint8_t square_res; // for renderers use
uint8_t cx1, cy1, cx2, cy2; // Change x and y coords
};
extern bms_lightmap GameLightmaps[MAX_LIGHTMAPS];
// Sets all the lightmaps to unused
void lm_InitLightmaps();
void lm_ShutdownLightmaps(void);
// Allocs a lightmap of w x h size
// Returns lightmap handle if successful, -1 if otherwise
int lm_AllocLightmap(int w, int h);
// Given a handle, frees the lightmap memory and flags this lightmap as unused
void lm_FreeLightmap(int handle);
// returns a lightmaps width else -1 if something is wrong
int lm_w(int handle);
// returns a lightmaps height , else -1 if something is wrong
int lm_h(int handle);
// returns a lightmaps data else NULL if something is wrong
uint16_t *lm_data(int handle);
#endif
|
