1 /* NetHack 3.6 pctiles.c $NHDT-Date: 1432512791 2015/05/25 00:13:11 $ $NHDT-Branch: master $:$NHDT-Revision: 1.11 $ */
2 /* Copyright (c) NetHack PC Development Team 1993, 1994 */
3 /* NetHack may be freely redistributed. See license for details. */
6 * pctiles.c - PC Graphical Tile Support Routines
9 * Initial Creation M. Allison 93/10/30
17 #if defined(__GO32__) || defined(__DJGPP__)
19 #define TILES_IN_RAM /* allow tiles to be read into ram */
24 #pragma warning(disable : 4018) /* signed/unsigned mismatch */
25 #pragma warning(disable : 4127) /* conditional expression is constant */
26 #pragma warning(disable : 4131) /* old style declarator */
27 #pragma warning(disable : 4309) /* initializing */
36 STATIC_VAR FILE *tilefile;
37 STATIC_VAR FILE *tilefile_O;
38 extern short glyph2tile[]; /* in tile.c (made from tilemap.c) */
41 struct planar_cell_struct *ramtiles;
42 struct overview_planar_cell_struct *oramtiles;
43 boolean tiles_in_ram = FALSE;
44 boolean otiles_in_ram = FALSE;
45 extern int total_tiles_used; /* tile.c */
49 * Read the header/palette information at the start of the
52 * There is 1024 bytes (1K) of header information
53 * at the start of the file, including a palette.
57 ReadTileFileHeader(tibhdr, filestyle)
58 struct tibhdr_struct *tibhdr;
62 x = filestyle ? tilefile_O : tilefile;
63 if (fseek(x, 0L, SEEK_SET)) {
66 fread(tibhdr, sizeof(struct tibhdr_struct), 1, x);
72 * Open the requested tile file.
74 * NetHack1.tib file is a series of
75 * 'struct planar_tile_struct' structures, one for each
78 * NetHack2.tib file is a series of
79 * char arrays [TILE_Y][TILE_X] in dimensions, one for each
82 * There is 1024 bytes (1K) of header information
83 * at the start of each .tib file. The first glyph tile starts at
88 OpenTileFile(tilefilename, filestyle)
96 tilefile_O = fopen(tilefilename, "rb");
97 if (tilefile_O == (FILE *) 0)
100 tilefile = fopen(tilefilename, "rb");
101 if (tilefile == (FILE *) 0)
105 if (iflags.preload_tiles) {
107 struct overview_planar_cell_struct *gp;
109 sizeof(struct overview_planar_cell_struct) * total_tiles_used;
110 if (fseek(tilefile_O, (long) TIBHEADER_SIZE,
111 SEEK_SET)) { /*failure*/
114 (struct overview_planar_cell_struct *) alloc(ram_needed);
115 /* Todo: fall back to file method here if alloc failed */
117 for (k = 0; k < total_tiles_used; ++k) {
118 fread(gp, sizeof(struct overview_planar_cell_struct), 1,
122 #ifdef DEBUG_RAMTILES
123 pline("%d overview tiles read into ram.", k);
126 otiles_in_ram = TRUE;
128 struct planar_cell_struct *gp;
130 sizeof(struct planar_cell_struct) * total_tiles_used;
131 if (fseek(tilefile, (long) TIBHEADER_SIZE,
132 SEEK_SET)) { /*failure*/
134 ramtiles = (struct planar_cell_struct *) alloc(ram_needed);
135 /* Todo: fall back to file method here if alloc failed */
137 for (k = 0; k < total_tiles_used; ++k) {
138 fread(gp, sizeof(struct planar_cell_struct), 1, tilefile);
141 #ifdef DEBUG_RAMTILES
142 pline("%d tiles read into ram.", k);
153 CloseTileFile(filestyle)
156 fclose(filestyle ? tilefile_O : tilefile);
158 if (!filestyle && tiles_in_ram) {
160 free((genericptr_t) ramtiles);
161 tiles_in_ram = FALSE;
162 } else if (filestyle && otiles_in_ram) {
164 free((genericptr_t) oramtiles);
165 otiles_in_ram = FALSE;
170 struct planar_cell_struct plancell;
171 struct overview_planar_cell_struct oplancell;
173 /* This routine retrieves the requested NetHack glyph tile
174 * from the planar style binary .tib file.
175 * This is currently done 'on demand', so if the player
176 * is running without a disk cache (ie. smartdrv) operating,
177 * things can really be slowed down. We don't have any
178 * base memory under MSDOS, in which to store the pictures.
180 * Todo: Investigate the possibility of loading the glyph
181 * tiles into extended or expanded memory using
182 * the MSC virtual memory routines.
184 * Under an environment like djgpp, it should be possible to
185 * read the entire set of glyph tiles into a large
186 * array of 'struct planar_cell_struct' structures at
187 * game initialization time, and recall them from the array
188 * as needed. That should speed things up (at the cost of
189 * increasing the memory requirement - can't have everything).
194 ReadPlanarTileFile(tilenum, gp)
196 struct planar_cell_struct **gp;
202 *gp = ramtiles + tilenum;
206 fpos = ((long) (tilenum) * (long) sizeof(struct planar_cell_struct))
207 + (long) TIBHEADER_SIZE;
208 if (fseek(tilefile, fpos, SEEK_SET)) {
211 fread(&plancell, sizeof(struct planar_cell_struct), 1, tilefile);
217 ReadPlanarTileFile_O(tilenum, gp)
219 struct overview_planar_cell_struct **gp;
225 *gp = oramtiles + tilenum;
230 ((long) (tilenum) * (long) sizeof(struct overview_planar_cell_struct))
231 + (long) TIBHEADER_SIZE;
232 if (fseek(tilefile_O, fpos, SEEK_SET)) {
235 fread(&oplancell, sizeof(struct overview_planar_cell_struct), 1,
245 ReadPackedTileFile(tilenum, pta)
252 ((long) (tilenum) * (long) (TILE_Y * TILE_X) + (long) TIBHEADER_SIZE);
253 if (fseek(tilefile, fpos, SEEK_SET)) {
256 fread(pta, (TILE_Y * TILE_X), 1, tilefile);
261 #endif /* USE_TILES */