| rev |
line source |
|
nuclear@0
|
1 /*
|
|
nuclear@0
|
2 256-color 3D graphics hack for real-mode DOS.
|
|
nuclear@0
|
3 Copyright (C) 2011 John Tsiombikas <nuclear@member.fsf.org>
|
|
nuclear@0
|
4
|
|
nuclear@0
|
5 This program is free software: you can redistribute it and/or modify
|
|
nuclear@0
|
6 it under the terms of the GNU General Public License as published by
|
|
nuclear@0
|
7 the Free Software Foundation, either version 3 of the License, or
|
|
nuclear@0
|
8 (at your option) any later version.
|
|
nuclear@0
|
9
|
|
nuclear@0
|
10 This program is distributed in the hope that it will be useful,
|
|
nuclear@0
|
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
nuclear@0
|
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
nuclear@0
|
13 GNU General Public License for more details.
|
|
nuclear@0
|
14
|
|
nuclear@0
|
15 You should have received a copy of the GNU General Public License
|
|
nuclear@0
|
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
nuclear@0
|
17 */
|
|
nuclear@0
|
18 #ifndef MGL_IMPL_H_
|
|
nuclear@0
|
19 #define MGL_IMPL_H_
|
|
nuclear@0
|
20
|
|
nuclear@0
|
21 #define MATRIX_STACK_SIZE 8
|
|
nuclear@0
|
22 #define MAX_LIGHTS 4
|
|
nuclear@0
|
23
|
|
nuclear@0
|
24 #define ROUND(x) ((x) >= 0.0 ? (x) + 0.5 : (x) - 0.5)
|
|
nuclear@0
|
25
|
|
nuclear@0
|
26 typedef struct {
|
|
nuclear@0
|
27 float x, y, z, w;
|
|
nuclear@0
|
28 } vec4_t;
|
|
nuclear@0
|
29
|
|
nuclear@0
|
30 typedef struct {
|
|
nuclear@0
|
31 float x, y, z;
|
|
nuclear@0
|
32 } vec3_t;
|
|
nuclear@0
|
33
|
|
nuclear@0
|
34 typedef struct {
|
|
nuclear@0
|
35 float x, y;
|
|
nuclear@0
|
36 } vec2_t;
|
|
nuclear@0
|
37
|
|
nuclear@0
|
38 typedef float mat4_t[16];
|
|
nuclear@0
|
39
|
|
nuclear@0
|
40 struct vertex {
|
|
nuclear@0
|
41 vec4_t pos;
|
|
nuclear@0
|
42 vec3_t norm;
|
|
nuclear@0
|
43 vec2_t tc;
|
|
nuclear@0
|
44 float energy;
|
|
nuclear@0
|
45 int cidx;
|
|
nuclear@0
|
46 };
|
|
nuclear@0
|
47
|
|
nuclear@0
|
48 struct state {
|
|
nuclear@0
|
49 unsigned int flags;
|
|
nuclear@0
|
50 int ord, frontface, cullface;
|
|
nuclear@0
|
51 int mmode, mtop[2];
|
|
nuclear@0
|
52 mat4_t matrix[2][MATRIX_STACK_SIZE];
|
|
nuclear@0
|
53 int prim;
|
|
nuclear@0
|
54 struct vertex curv, v[4];
|
|
nuclear@0
|
55 int vidx;
|
|
nuclear@0
|
56 int vp[4]; /* viewport */
|
|
nuclear@0
|
57 int col_range; /* color interpolation range */
|
|
nuclear@0
|
58 vec3_t ldir[MAX_LIGHTS];
|
|
nuclear@0
|
59 float lint[MAX_LIGHTS];
|
|
nuclear@0
|
60 };
|
|
nuclear@0
|
61
|
|
nuclear@0
|
62 struct framebuffer {
|
|
nuclear@0
|
63 int width, height;
|
|
nuclear@0
|
64 unsigned char *pixels;
|
|
nuclear@0
|
65 unsigned short **zbuf; /* zbuffer broken in 64k tiles */
|
|
nuclear@0
|
66 };
|
|
nuclear@0
|
67
|
|
nuclear@0
|
68 int mgl_rast_init(struct state *state, struct framebuffer *fbuf);
|
|
nuclear@0
|
69 void mgl_rast_cleanup(void);
|
|
nuclear@0
|
70 void mgl_rast_prepare(void);
|
|
nuclear@0
|
71 void mgl_draw_point(struct vertex *v);
|
|
nuclear@0
|
72 void mgl_draw_line(struct vertex *v0, struct vertex *v1);
|
|
nuclear@0
|
73 void mgl_draw_poly(struct vertex *v, int numv);
|
|
nuclear@0
|
74
|
|
nuclear@0
|
75 #endif /* MGL_IMPL_H_ */
|
