void CAL_SetupGrFile()
{
char fname[13];
bstone::FileStream handle;
Uint8* compseg;
//
// load ???dict.ext (huffman dictionary for graphics files)
//
strcpy(fname, gdictname);
strcat(fname, extension);
handle.open(fname);
if (!handle.is_open())
CA_CannotOpen(fname);
handle.read(&grhuffman, sizeof(grhuffman));
//
// load the data offsets from ???head.ext
//
int grstarts_size = (NUMCHUNKS + 1) * FILEPOSSIZE;
grstarts = new Sint32[(grstarts_size + 3) / 4];
strcpy(fname, gheadname);
strcat(fname, extension);
handle.open(fname);
if (!handle.is_open())
CA_CannotOpen(fname);
handle.read(grstarts, grstarts_size);
//
// Open the graphics file, leaving it open until the game is finished
//
OpenGrFile();
//
// load the pic and sprite headers into the arrays in the data segment
//
pictable = new pictabletype[NUMPICS];
CAL_GetGrChunkLength(STRUCTPIC); // position file pointer
compseg = new Uint8[chunkcomplen];
grhandle.read(compseg, chunkcomplen);
CAL_HuffExpand(
compseg,
(Uint8*)pictable,
NUMPICS * sizeof(pictabletype),
grhuffman);
delete [] compseg;
}
/*
-----------------------------------------------------------------------------
Function: CAL_SetupGrFile() -Initialize graphic files and arrays.
Parameters: extension -[in] Pointer to a null-terminated string that
specifies the file extension.
(must be in '.XXX' format).
Returns: 1 on success, 0 otherwise.
Notes:
Uses global variables grhandle and pictable.
1. Open vgadict.XXX, read huffman dictionary data.
2. Open vgahead.XXX, read data offsets.
3. Open vgagraph.XXX, read pic and sprite header, expand data.
-----------------------------------------------------------------------------
*/
PRIVATE W8 CAL_SetupGrFile( const char *extension )
{
void *compseg;
FILE *handle;
char filename[ 16 ];
SW32 chunkcomplen; // chunk compressed length
//
// load vgadict.ext (huffman dictionary for graphics files)
//
cs_strlcpy( filename, GFXDICTFNAME, sizeof( filename ) );
cs_strlcat( filename, extension, sizeof( filename ) );
if( ( handle = fopen( cs_strupr( filename ), "rb" ) ) == NULL )
{
if( ( handle = fopen( cs_strlwr( filename ), "rb" ) ) == NULL )
{
printf( "Could not open file (%s) for read!\n", filename );
return 0;
}
}
fread( grhuffman, sizeof( grhuffman ), 1, handle );
fclose( handle );
//
// Open then load the data offsets from vgahead.ext
//
cs_strlcpy( filename, GFXHEADFNAME, sizeof( filename ) );
cs_strlcat( filename, extension, sizeof( filename ) );
if( (handle = fopen( cs_strupr( filename ), "rb" )) == NULL )
{
if( (handle = fopen( cs_strlwr( filename ), "rb" )) == NULL )
{
printf( "Could not open file (%s) for read!\n", filename );
return 0;
}
}
grstarts = MM_MALLOC( (NUMCHUNKS+1) * FILEPOSSIZE );
if( grstarts == NULL )
{
return 0;
}
fread( grstarts, sizeof( long ), (NUMCHUNKS+1) * FILEPOSSIZE, handle );
fclose( handle );
//
// Open the graphics file 'vgagraph.XXX'.
//
cs_strlcpy( filename, GFXFNAME, sizeof( filename ) );
cs_strlcat( filename, extension, sizeof( filename ) );
if( ( grhandle = fopen( cs_strupr( filename ), "rb" ) ) == NULL )
{
if( ( grhandle = fopen( cs_strlwr( filename ), "rb" ) ) == NULL )
{
printf( "Could not open file (%s) for read!\n", filename );
return 0;
}
}
//
// load the pic and sprite headers into the arrays.
//
pictable = MM_MALLOC( NUMPICS * sizeof( pictabletype ) );
if( pictable == NULL )
{
return 0;
}
chunkcomplen = CAL_GetGrChunkLength( STRUCTPIC ); // position file pointer
compseg = MM_MALLOC( chunkcomplen );
if( compseg == NULL )
{
return 0;
}
fread( compseg, chunkcomplen, 1, grhandle );
CAL_HuffExpand( compseg, (PW8)pictable,
NUMPICS * sizeof( pictabletype ),
grhuffman );
MM_FREE( compseg );
return 1;
}
