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jwalz
259
sys/msdos/pctiles.c
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259
sys/msdos/pctiles.c
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/* SCCS Id: @(#)pctiles.c 3.3 95/07/31 */
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/* Copyright (c) NetHack PC Development Team 1993, 1994 */
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/* NetHack may be freely redistributed. See license for details. */
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/* */
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/*
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* pctiles.c - PC Graphical Tile Support Routines
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*
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*Edit History:
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* Initial Creation M. Allison 93/10/30
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*
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*/
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#include "hack.h"
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#ifdef USE_TILES
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#if defined(__GO32__) || defined(__DJGPP__)
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#include <unistd.h>
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#define TILES_IN_RAM /* allow tiles to be read into ram */
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#endif
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# if defined(_MSC_VER)
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# if _MSC_VER >= 700
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#pragma warning(disable:4018) /* signed/unsigned mismatch */
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#pragma warning(disable:4127) /* conditional expression is constant */
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#pragma warning(disable:4131) /* old style declarator */
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#pragma warning(disable:4309) /* initializing */
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# endif
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#include <conio.h>
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# endif
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#include "pcvideo.h"
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#include "tile.h"
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#include "pctiles.h"
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STATIC_VAR FILE *tilefile;
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STATIC_VAR FILE *tilefile_O;
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extern short glyph2tile[]; /* in tile.c (made from tilemap.c) */
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#ifdef TILES_IN_RAM
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struct planar_cell_struct *ramtiles;
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struct overview_planar_cell_struct *oramtiles;
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boolean tiles_in_ram = FALSE;
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boolean otiles_in_ram = FALSE;
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extern int total_tiles_used; /* tile.c */
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#endif
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# ifdef OVLB
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/*
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* Read the header/palette information at the start of the
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* NetHack.tib file.
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*
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* There is 1024 bytes (1K) of header information
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* at the start of the file, including a palette.
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*
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*/
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int ReadTileFileHeader(tibhdr, filestyle)
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struct tibhdr_struct *tibhdr;
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boolean filestyle;
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{
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FILE *x;
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x = filestyle ? tilefile_O : tilefile;
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if (fseek(x,0L,SEEK_SET)) {
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return 1;
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} else {
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fread(tibhdr, sizeof(struct tibhdr_struct), 1, x);
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}
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return 0;
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}
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/*
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* Open the requested tile file.
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*
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* NetHack1.tib file is a series of
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* 'struct planar_tile_struct' structures, one for each
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* glyph tile.
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*
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* NetHack2.tib file is a series of
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* char arrays [TILE_Y][TILE_X] in dimensions, one for each
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* glyph tile.
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*
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* There is 1024 bytes (1K) of header information
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* at the start of each .tib file. The first glyph tile starts at
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* location 1024.
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*
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*/
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int
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OpenTileFile(tilefilename, filestyle)
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char *tilefilename;
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boolean filestyle;
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{
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#ifdef TILES_IN_RAM
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int k;
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#endif
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if (filestyle) {
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tilefile_O = fopen(tilefilename,"rb");
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if (tilefile_O == (FILE *)0) return 1;
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} else {
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tilefile = fopen(tilefilename,"rb");
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if (tilefile == (FILE *)0) return 1;
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}
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#ifdef TILES_IN_RAM
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if (iflags.preload_tiles) {
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if (filestyle) {
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struct overview_planar_cell_struct *gp;
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long ram_needed = sizeof(struct overview_planar_cell_struct) *
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total_tiles_used;
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if (fseek(tilefile_O,(long)TIBHEADER_SIZE, SEEK_SET)) { /*failure*/
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}
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oramtiles = (struct overview_planar_cell_struct *)alloc(ram_needed);
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/* Todo: fall back to file method here if alloc failed */
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gp = oramtiles;
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for(k=0; k < total_tiles_used; ++k) {
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fread(gp, sizeof(struct overview_planar_cell_struct),
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1, tilefile_O);
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++gp;
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}
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#ifdef DEBUG_RAMTILES
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pline("%d overview tiles read into ram.", k);
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mark_synch();
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#endif
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otiles_in_ram = TRUE;
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} else {
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struct planar_cell_struct *gp;
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long ram_needed = sizeof(struct planar_cell_struct) *
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total_tiles_used;
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if (fseek(tilefile,(long)TIBHEADER_SIZE, SEEK_SET)) { /*failure*/
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}
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ramtiles = (struct planar_cell_struct *)alloc(ram_needed);
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/* Todo: fall back to file method here if alloc failed */
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gp = ramtiles;
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for(k=0; k < total_tiles_used; ++k) {
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fread(gp, sizeof(struct planar_cell_struct),
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1, tilefile);
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++gp;
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}
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#ifdef DEBUG_RAMTILES
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pline("%d tiles read into ram.", k);
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mark_synch();
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#endif
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tiles_in_ram = TRUE;
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}
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}
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#endif
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return 0;
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}
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void
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CloseTileFile(filestyle)
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boolean filestyle;
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{
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fclose(filestyle ? tilefile_O : tilefile);
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#ifdef TILES_IN_RAM
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if (!filestyle && tiles_in_ram) {
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if (ramtiles) free((genericptr_t) ramtiles);
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tiles_in_ram = FALSE;
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} else if (filestyle && otiles_in_ram) {
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if (oramtiles) free((genericptr_t) oramtiles);
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otiles_in_ram = FALSE;
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}
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#endif
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}
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# endif /* OVLB */
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# ifdef OVL0
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struct planar_cell_struct plancell;
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struct overview_planar_cell_struct oplancell;
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/* This routine retrieves the requested NetHack glyph tile
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* from the planar style binary .tib file.
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* This is currently done 'on demand', so if the player
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* is running without a disk cache (ie. smartdrv) operating,
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* things can really be slowed down. We don't have any
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* base memory under MSDOS, in which to store the pictures.
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*
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* Todo: Investigate the possibility of loading the glyph
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* tiles into extended or expanded memory using
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* the MSC virtual memory routines.
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*
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* Under an environment like djgpp, it should be possible to
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* read the entire set of glyph tiles into a large
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* array of 'struct planar_cell_struct' structures at
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* game initialization time, and recall them from the array
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* as needed. That should speed things up (at the cost of
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* increasing the memory requirement - can't have everything).
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*
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*/
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# ifdef PLANAR_FILE
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int ReadPlanarTileFile(tilenum,gp)
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int tilenum;
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struct planar_cell_struct **gp;
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{
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long fpos;
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#ifdef TILES_IN_RAM
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if (tiles_in_ram) {
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*gp = ramtiles + tilenum;
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return 0;
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}
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#endif
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fpos = ((long)(tilenum) * (long)sizeof(struct planar_cell_struct)) +
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(long)TIBHEADER_SIZE;
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if (fseek(tilefile,fpos,SEEK_SET)) {
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return 1;
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} else {
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fread(&plancell, sizeof(struct planar_cell_struct), 1, tilefile);
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}
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*gp = &plancell;
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return 0;
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}
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int ReadPlanarTileFile_O(tilenum,gp)
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int tilenum;
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struct overview_planar_cell_struct **gp;
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{
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long fpos;
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#ifdef TILES_IN_RAM
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if (otiles_in_ram) {
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*gp = oramtiles + tilenum;
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return 0;
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}
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#endif
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fpos = ((long)(tilenum) *
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(long)sizeof(struct overview_planar_cell_struct)) +
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(long)TIBHEADER_SIZE;
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if (fseek(tilefile_O,fpos,SEEK_SET)) {
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return 1;
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} else {
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fread(&oplancell, sizeof(struct overview_planar_cell_struct),
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1, tilefile_O);
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}
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*gp = &oplancell;
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return 0;
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}
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# endif
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# ifdef PACKED_FILE
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int ReadPackedTileFile(tilenum,pta)
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int tilenum;
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char (*pta)[TILE_X];
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{
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long fpos;
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fpos = ((long)(tilenum) * (long)(TILE_Y * TILE_X) +
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(long)TIBHEADER_SIZE;
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if (fseek(tilefile,fpos,SEEK_SET)) {
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return 1;
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} else {
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fread(pta, (TILE_Y * TILE_X), 1, tilefile);
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}
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return 0;
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}
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# endif
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# endif /* OVL0 */
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#endif /* USE_TILES */
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/* pctiles.c */
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