1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/rend.c	Sun Jan 18 13:30:30 2015 +0200
     1.3 @@ -0,0 +1,119 @@
     1.4 +#include <stdlib.h>
     1.5 +#include <string.h>
     1.6 +#include "rend.h"
     1.7 +#include "player.h"
     1.8 +
     1.9 +static void draw_tile(struct tile *tile);
    1.10 +
    1.11 +static struct image fb;
    1.12 +
    1.13 +
    1.14 +int init_renderer(void)
    1.15 +{
    1.16 +	return 0;
    1.17 +}
    1.18 +
    1.19 +void shutdown_renderer(void)
    1.20 +{
    1.21 +}
    1.22 +
    1.23 +void setup_renderer(unsigned char *pixels, int xsz, int ysz)
    1.24 +{
    1.25 +	fb.xsz = xsz;
    1.26 +	fb.ysz = ysz;
    1.27 +	fb.pixels = pixels;
    1.28 +}
    1.29 +
    1.30 +#define MAX_Z	5
    1.31 +#define LEFT	0
    1.32 +#define CENTER	1
    1.33 +#define RIGHT	2
    1.34 +
    1.35 +#define CHR_TYPE	0
    1.36 +#define CHR_SIDE	1
    1.37 +#define CHR_STATE	2
    1.38 +#define CHR_Z		3
    1.39 +
    1.40 +void render_level(struct level *lvl, int px, int py, int pdir)
    1.41 +{
    1.42 +	int i, j, dx, dy, backz, clear_start, clear_end;
    1.43 +	char cells[3][MAX_Z + 1];
    1.44 +	struct tileset *ts = &lvl->tileset;
    1.45 +	struct tile *tile_ceil, *tile_floor;
    1.46 +
    1.47 +	dx = pdir == DIR_EAST ? 1 : (pdir == DIR_WEST ? -1 : 0);
    1.48 +	dy = pdir == DIR_NORTH ? -1 : (pdir == DIR_SOUTH ? 1 : 0);
    1.49 +
    1.50 +	for(i=0; i<3; i++) {	/* get 3 abreast cells ... */
    1.51 +		int xoffs = (1 - i) * dy;
    1.52 +		int yoffs = (i - 1) * dx;
    1.53 +
    1.54 +		for(j=0; j<MAX_Z + 1; j++) {	/* ... for each depth */
    1.55 +			int x = px + xoffs + dx * j;
    1.56 +			int y = py + yoffs + dy * j;
    1.57 +
    1.58 +			cells[i][j] = level_cell(lvl, x, y);
    1.59 +		}
    1.60 +	}
    1.61 +
    1.62 +	/* draw floor and ceiling */
    1.63 +	tile_ceil = get_tile(ts, "ceil");
    1.64 +	tile_floor = get_tile(ts, "floor");
    1.65 +
    1.66 +	clear_start = tile_ceil ? tile_ceil->orig_y + tile_ceil->img.ysz : 0;
    1.67 +	clear_end = tile_floor ? tile_floor->orig_y : fb.ysz;
    1.68 +
    1.69 +	draw_tile(tile_ceil);
    1.70 +	draw_tile(tile_floor);
    1.71 +	memset(fb.pixels + clear_start * fb.xsz, 0, (clear_end - clear_start) * fb.xsz);
    1.72 +
    1.73 +	/* find where the back wall should go if it is within visual range
    1.74 +	 * and draw it ...
    1.75 +	 */
    1.76 +	backz = -1;
    1.77 +	for(i=1; i<MAX_Z + 1; i++) {
    1.78 +		if(cells[CENTER][i] == '#') {
    1.79 +			char name[] = "wcs ";	/* wall-center-solid */
    1.80 +			backz = i;
    1.81 +			name[CHR_Z] = backz + '0' - 1;
    1.82 +			draw_tile(get_tile(ts, name));
    1.83 +			break;
    1.84 +		}
    1.85 +	}
    1.86 +	if(backz == -1) {
    1.87 +		char name[] = "wco ";	/* wall-center-open */
    1.88 +		backz = MAX_Z;
    1.89 +		name[CHR_Z] = backz + '0' - 1;
    1.90 +		draw_tile(get_tile(ts, name));
    1.91 +	}
    1.92 +
    1.93 +	/* now render back to front */
    1.94 +	for(i=0; i<backz; i++) {
    1.95 +		int z = backz - i - 1;
    1.96 +		char name[] = "w---";	/* wall-<side>-<state>-<z> */
    1.97 +
    1.98 +		for(j=0; j<3; j++) {
    1.99 +			int state = 's';
   1.100 +
   1.101 +			if(j == CENTER) continue;	/* no walls in the center */
   1.102 +
   1.103 +			if(cells[j][z] != '#') {
   1.104 +				state = 'o';
   1.105 +				/* if it's an open cell, then skip drawing if the next z is also open */
   1.106 +				if(z >= MAX_Z || cells[j][z + 1] != '#') continue;
   1.107 +			}
   1.108 +
   1.109 +			name[CHR_SIDE] = j == LEFT ? 'l' : 'r';
   1.110 +			name[CHR_STATE] = state;
   1.111 +			name[CHR_Z] = z + '0';
   1.112 +			draw_tile(get_tile(ts, name));
   1.113 +		}
   1.114 +	}
   1.115 +}
   1.116 +
   1.117 +static void draw_tile(struct tile *tile)
   1.118 +{
   1.119 +	if(!tile) return;
   1.120 +
   1.121 +	blitkey(&fb, tile->orig_x, tile->orig_y, &tile->img, 31);	/* TODO unhardcode key */
   1.122 +}