dos3d

annotate src/mglimpl.h @ 24:698c4d07702d

fixed the linux makefile
author John Tsiombikas <nuclear@member.fsf.org>
date Tue, 20 Jun 2017 21:55:49 +0300
parents 0909996838ff
children
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@14 21 #include "vmath.h"
nuclear@14 22
nuclear@0 23 #define MATRIX_STACK_SIZE 8
nuclear@0 24 #define MAX_LIGHTS 4
nuclear@0 25
nuclear@9 26 #define ZTILE_SIZE 16384
nuclear@9 27 #define ZTILE_SHIFT 14
nuclear@9 28 #define ZTILE_MASK 0x3fff
nuclear@9 29
nuclear@9 30 #define ZTILE(x) (((x) & ~ZTILE_MASK) >> ZTILE_SHIFT)
nuclear@9 31 #define ZTILE_OFFS(x) ((x) & ZTILE_MASK)
nuclear@9 32
nuclear@0 33 #define ROUND(x) ((x) >= 0.0 ? (x) + 0.5 : (x) - 0.5)
nuclear@0 34
nuclear@0 35
nuclear@0 36 typedef float mat4_t[16];
nuclear@0 37
nuclear@0 38 struct vertex {
nuclear@0 39 vec4_t pos;
nuclear@0 40 vec3_t norm;
nuclear@0 41 vec2_t tc;
nuclear@0 42 float energy;
nuclear@0 43 int cidx;
nuclear@0 44 };
nuclear@0 45
nuclear@3 46 struct texture {
nuclear@3 47 int width, height;
nuclear@3 48 int xshift, yshift;
nuclear@3 49 unsigned int xmask, ymask;
nuclear@3 50 unsigned char *pixels;
nuclear@3 51 };
nuclear@3 52
nuclear@0 53 struct state {
nuclear@0 54 unsigned int flags;
nuclear@0 55 int ord, frontface, cullface;
nuclear@0 56 int mmode, mtop[2];
nuclear@0 57 mat4_t matrix[2][MATRIX_STACK_SIZE];
nuclear@0 58 int prim;
nuclear@0 59 struct vertex curv, v[4];
nuclear@0 60 int vidx;
nuclear@0 61 int vp[4]; /* viewport */
nuclear@0 62 int col_range; /* color interpolation range */
nuclear@11 63 vec4_t lpos[MAX_LIGHTS];
nuclear@0 64 float lint[MAX_LIGHTS];
nuclear@3 65
nuclear@3 66 struct texture tex;
nuclear@0 67 };
nuclear@0 68
nuclear@0 69 struct framebuffer {
nuclear@0 70 int width, height;
nuclear@0 71 unsigned char *pixels;
nuclear@9 72 unsigned short **zbuf; /* zbuffer broken in ZTILE_SIZE tiles */
nuclear@9 73 int num_ztiles;
nuclear@0 74 };
nuclear@0 75
nuclear@3 76
nuclear@0 77 int mgl_rast_init(struct state *state, struct framebuffer *fbuf);
nuclear@0 78 void mgl_rast_cleanup(void);
nuclear@0 79 void mgl_rast_prepare(void);
nuclear@0 80 void mgl_draw_point(struct vertex *v);
nuclear@0 81 void mgl_draw_line(struct vertex *v0, struct vertex *v1);
nuclear@0 82 void mgl_draw_poly(struct vertex *v, int numv);
nuclear@0 83
nuclear@0 84 #endif /* MGL_IMPL_H_ */