quakespasm/source/wad.c

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2022-02-08 19:06:54 +00:00
/*
Copyright (C) 1996-2001 Id Software, Inc.
Copyright (C) 2002-2009 John Fitzgibbons and others
Copyright (C) 2010-2014 QuakeSpasm developers
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// wad.c
#include "quakedef.h"
int wad_numlumps;
lumpinfo_t *wad_lumps;
byte *wad_base = NULL;
void SwapPic (qpic_t *pic);
/*
==================
W_CleanupName
Lowercases name and pads with spaces and a terminating 0 to the length of
lumpinfo_t->name.
Used so lumpname lookups can proceed rapidly by comparing 4 chars at a time
Space padding is so names can be printed nicely in tables.
Can safely be performed in place.
==================
*/
void W_CleanupName (const char *in, char *out)
{
int i;
int c;
for (i=0 ; i<16 ; i++ )
{
c = in[i];
if (!c)
break;
if (c >= 'A' && c <= 'Z')
c += ('a' - 'A');
out[i] = c;
}
for ( ; i< 16 ; i++ )
out[i] = 0;
}
/*
====================
W_LoadWadFile
====================
*/
void W_LoadWadFile (void) //johnfitz -- filename is now hard-coded for honesty
{
lumpinfo_t *lump_p;
wadinfo_t *header;
int i;
int infotableofs;
const char *filename = WADFILENAME;
//johnfitz -- modified to use malloc
//TODO: use cache_alloc
if (wad_base)
free (wad_base);
wad_base = COM_LoadMallocFile (filename, NULL);
if (!wad_base)
Sys_Error ("W_LoadWadFile: couldn't load %s\n\n"
"Basedir is: %s\n\n"
"Check that this has an " GAMENAME " subdirectory containing pak0.pak and pak1.pak, "
"or use the -basedir command-line option to specify another directory.",
filename, com_basedir);
header = (wadinfo_t *)wad_base;
if (header->identification[0] != 'W' || header->identification[1] != 'A'
|| header->identification[2] != 'D' || header->identification[3] != '2')
Sys_Error ("Wad file %s doesn't have WAD2 id\n",filename);
wad_numlumps = LittleLong(header->numlumps);
infotableofs = LittleLong(header->infotableofs);
wad_lumps = (lumpinfo_t *)(wad_base + infotableofs);
for (i=0, lump_p = wad_lumps ; i<wad_numlumps ; i++,lump_p++)
{
lump_p->filepos = LittleLong(lump_p->filepos);
lump_p->size = LittleLong(lump_p->size);
W_CleanupName (lump_p->name, lump_p->name); // CAUTION: in-place editing!!!
if (lump_p->type == TYP_QPIC)
SwapPic ( (qpic_t *)(wad_base + lump_p->filepos));
}
}
/*
=============
W_GetLumpinfo
=============
*/
lumpinfo_t *W_GetLumpinfo (const char *name)
{
int i;
lumpinfo_t *lump_p;
char clean[16];
W_CleanupName (name, clean);
for (lump_p=wad_lumps, i=0 ; i<wad_numlumps ; i++,lump_p++)
{
if (!strcmp(clean, lump_p->name))
return lump_p;
}
Con_SafePrintf ("W_GetLumpinfo: %s not found\n", name); //johnfitz -- was Sys_Error
return NULL;
}
void *W_GetLumpName (const char *name)
{
lumpinfo_t *lump;
lump = W_GetLumpinfo (name);
if (!lump) return NULL; //johnfitz
return (void *)(wad_base + lump->filepos);
}
void *W_GetLumpNum (int num)
{
lumpinfo_t *lump;
if (num < 0 || num > wad_numlumps)
Sys_Error ("W_GetLumpNum: bad number: %i", num);
lump = wad_lumps + num;
return (void *)(wad_base + lump->filepos);
}
/*
=============================================================================
automatic byte swapping
=============================================================================
*/
void SwapPic (qpic_t *pic)
{
pic->width = LittleLong(pic->width);
pic->height = LittleLong(pic->height);
}
/*
=============================================================================
WAD3 Texture loading for BSP 3.0 Support from Baker -- Naievil hlbsp
=============================================================================
*/
#define TEXWAD_MAXIMAGES 16384
typedef struct {
char name[MAX_QPATH];
FILE *file;
int position;
int size;
} texwadlump_t;
static texwadlump_t texwadlump[TEXWAD_MAXIMAGES];
void WAD3_LoadTextureWadFile (char *filename) {
lumpinfo_t *lumps, *lump_p;
wadinfo_t header;
int i, j, infotableofs, numlumps, lowmark;
FILE *file;
Con_Printf("loading WAD3 texture file: %s\n", filename);
if (COM_FOpenFile (va("textures/halflife/%s", filename), &file, NULL) != -1)
goto loaded;
if (COM_FOpenFile (va("textures/%s", filename), &file, NULL) != -1)
goto loaded;
if (COM_FOpenFile (filename, &file, NULL) != -1)
goto loaded;
Host_Error ("Couldn't load halflife wad \"%s\"\n", filename);
loaded:
if (fread(&header, 1, sizeof(wadinfo_t), file) != sizeof(wadinfo_t)) {
Con_Printf ("WAD3_LoadTextureWadFile: unable to read wad header");
return;
}
if (memcmp(header.identification, "WAD3", 4)) {
Con_Printf ("WAD3_LoadTextureWadFile: Wad file %s doesn't have WAD3 id\n",filename);
return;
}
numlumps = LittleLong(header.numlumps);
if (numlumps < 1 || numlumps > TEXWAD_MAXIMAGES) {
Con_Printf ("WAD3_LoadTextureWadFile: invalid number of lumps (%i)\n", numlumps);
return;
}
infotableofs = LittleLong(header.infotableofs);
if (fseek(file, infotableofs, SEEK_SET)) {
Con_Printf ("WAD3_LoadTextureWadFile: unable to seek to lump table");
return;
}
lowmark = Hunk_LowMark();
if (!(lumps = Hunk_Alloc(sizeof(lumpinfo_t) * numlumps))) {
Con_Printf ("WAD3_LoadTextureWadFile: unable to allocate temporary memory for lump table");
return;
}
if (fread(lumps, 1, sizeof(lumpinfo_t) * numlumps, file) != sizeof(lumpinfo_t) * numlumps) {
Con_Printf ("WAD3_LoadTextureWadFile: unable to read lump table");
Hunk_FreeToLowMark(lowmark);
return;
}
for (i = 0, lump_p = lumps; i < numlumps; i++,lump_p++) {
W_CleanupName (lump_p->name, lump_p->name);
for (j = 0; j < TEXWAD_MAXIMAGES; j++) {
if (!texwadlump[j].name[0] || !strcmp(lump_p->name, texwadlump[j].name))
break;
}
if (j == TEXWAD_MAXIMAGES)
break; // we are full, don't load any more
if (!texwadlump[j].name[0])
Q_strncpyz (texwadlump[j].name, lump_p->name, sizeof(texwadlump[j].name));
texwadlump[j].file = file;
texwadlump[j].position = LittleLong(lump_p->filepos);
texwadlump[j].size = LittleLong(lump_p->disksize);
}
Hunk_FreeToLowMark(lowmark);
//leaves the file open
}
//converts paletted to rgba
static byte *ConvertWad3ToRGBA(miptex_t *tex) {
byte *in, *data, *pal;
int i, p, image_size;
if (!tex->offsets[0])
Sys_Error("ConvertWad3ToRGBA: tex->offsets[0] == 0");
image_size = tex->width * tex->height;
in = (byte *) ((byte *) tex + tex->offsets[0]);
data = malloc(image_size * 4); // Baker
pal = in + ((image_size * 85) >> 6) + 2;
for (i = 0; i < image_size; i++) {
p = *in++;
if (tex->name[0] == '{' && p == 255) {
((int *) data)[i] = 0;
} else {
p *= 3;
data[i * 4 + 0] = pal[p];
data[i * 4 + 1] = pal[p + 1];
data[i * 4 + 2] = pal[p + 2];
data[i * 4 + 3] = 255;
}
}
return data;
}
byte *WAD3_LoadTexture(miptex_t *mt) {
char texname[MAX_QPATH];
int i, j, lowmark = 0;
FILE *file;
miptex_t *tex;
byte *data;
if (mt->offsets[0])
return ConvertWad3ToRGBA(mt);
texname[sizeof(texname) - 1] = 0;
W_CleanupName (mt->name, texname);
for (i = 0; i < TEXWAD_MAXIMAGES; i++) {
if (!texwadlump[i].name[0])
break;
if (strcmp(texname, texwadlump[i].name))
continue;
file = texwadlump[i].file;
if (fseek(file, texwadlump[i].position, SEEK_SET)) {
Con_Printf("WAD3_LoadTexture: corrupt WAD3 file");
return NULL;
}
lowmark = Hunk_LowMark();
tex = Hunk_Alloc(texwadlump[i].size);
if (fread(tex, 1, texwadlump[i].size, file) < texwadlump[i].size) {
Con_Printf("WAD3_LoadTexture: corrupt WAD3 file");
Hunk_FreeToLowMark(lowmark);
return NULL;
}
tex->width = LittleLong(tex->width);
tex->height = LittleLong(tex->height);
if (tex->width != mt->width || tex->height != mt->height) {
Hunk_FreeToLowMark(lowmark);
return NULL;
}
for (j = 0;j < MIPLEVELS;j++)
tex->offsets[j] = LittleLong(tex->offsets[j]);
data = ConvertWad3ToRGBA(tex);
Hunk_FreeToLowMark(lowmark);
return data;
}
return NULL;
}