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Initial commit of Command & Conquer Red Alert source code.

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LFeenanEA
2025-02-27 16:15:05 +00:00
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WWFLAT32/FONT/LOADFONT.CPP Normal file
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/*
** Command & Conquer Red Alert(tm)
** Copyright 2025 Electronic Arts Inc.
**
** 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 3 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, see <http://www.gnu.org/licenses/>.
*/
/***************************************************************************
** C O N F I D E N T I A L --- W E S T W O O D A S S O C I A T E S **
***************************************************************************
* *
* Project Name : Westwood Library *
* *
* File Name : LOADFONT.C *
* *
* Programmer : Joe L. Bostic *
* *
* Start Date : September 6, 1991 *
* *
* Last Update : June 27, 1994 [SKB] *
* *
*-------------------------------------------------------------------------*
* Functions: *
* Load_Font -- Loads a font from disk. *
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#include <wwstd.h>
#include "font.h"
#include <file.h>
#include <wwmem.h>
#if(IBM)
#include <fcntl.h>
#include <io.h>
#endif
int FontXSpacing = 0;
int FontYSpacing = 0;
void const *FontPtr = NULL;
BYTE FontWidth = 8;
BYTE FontHeight = 8;
// only font.c and set_font.c use the following
BYTE *FontWidthBlockPtr = NULL;
/***************************************************************************
* LOAD_FONT -- Loads a font from disk. *
* *
* This loads a font from disk. This function must be called as a *
* precursor to calling Set_Font(). You need only call this function *
* once per desired font at the beginning of your code, but AFTER *
* Prog_Init() is called. *
* *
* INPUT: name - Pointer to font name to use (eg. "topaz.font") *
* *
* fontsize - Size in points of the font loaded. *
* *
* OUTPUT: Pointer to font data or NULL if unable to load. *
* *
* WARNINGS: Some system memory is grabbed by this routine. *
* *
* HISTORY: *
* 4/10/91 BS : 2.0 compatibily *
* 6/09/91 JLB : IBM and Amiga compatability. *
* 11/27/1991 JLB : Uses file I/O routines for disk access. *
* 01/29/1992 DRD : Modified to use new font format. *
* 02/01/1992 DRD : Added font file verification. *
* 06/29/1994 SKB : modified for 32 bit library *
*=========================================================================*/
VOID *cdecl Load_Font(BYTE const *name)
{
BYTE valid;
WORD fh; // DOS file handle for font file.
UWORD size; // Size of the data in the file (-2);
BYTE *ptr = NULL; // Pointer to newly loaded font.
if (Find_File(name)) {
fh = Open_File(name, READ);
if (Read_File(fh, (BYTE *) &size, 2) != 2) return(NULL);
ptr = (BYTE *) Alloc(size, MEM_NORMAL);
*(WORD *)ptr = size;
Read_File(fh, ptr + 2, size - 2);
Close_File(fh);
} else {
return (NULL);
}
//
// verify that the file loaded is a valid font file.
//
valid = FALSE;
if (*(ptr + 2) == 0) { // no compression
if (*(ptr + 3) == 5) { // currently only 5 data blocks are used.
valid = TRUE;
}
}
if ( !valid ) {
return (NULL);
}
return(ptr);
}