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Initial commit of Command & Conquer Red Alert source code.
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LFeenanEA
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VQ/VQM32/FONT.CPP
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VQ/VQM32/FONT.CPP
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/*
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** Command & Conquer Red Alert(tm)
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** Copyright 2025 Electronic Arts Inc.
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**
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** This program is free software: you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation, either version 3 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/****************************************************************************
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*
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* C O N F I D E N T I A L -- W E S T W O O D S T U D I O S
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*
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*---------------------------------------------------------------------------
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*
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* FILE
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* font.c
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*
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* DESCRIPTION
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* Font manipulation.
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*
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* PROGRAMMER
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* Denzil E. Long, Jr.
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*
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* DATE
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* March 9, 1995
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*
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*---------------------------------------------------------------------------
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*
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* PUBLIC
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* Load_Font - Open a font for use.
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* Set_Font - Set the default system font.
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* String_Pixel_Width - Get the pixel width of a string.
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*
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****************************************************************************/
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#include <stdlib.h>
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#include <fcntl.h>
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#include <io.h>
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#include <string.h>
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#include <malloc.h>
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#include "font.h"
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/*---------------------------------------------------------------------------
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* PRIVATE DECLARATIONS
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*-------------------------------------------------------------------------*/
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/* min and max macros */
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#ifdef __cplusplus
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#ifndef max
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#define max(a,b) (((a) > (b)) ? (a) : (b))
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#endif
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#ifndef min
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#define min(a,b) (((a) < (b)) ? (a) : (b))
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#endif
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#endif
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void const *FontPtr = NULL;
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char FontHeight = 8;
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char FontWidth = 8;
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int FontXSpacing = 0;
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int FontYSpacing = 0;
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char *FontWidthBlockPtr = NULL;
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/****************************************************************************
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*
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* NAME
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* Load_Font - Open a font for use.
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*
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* SYNOPSIS
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* Font = Load_Font(Name)
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*
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* char *Load_Font(char *);
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*
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* FUNCTION
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* Open a graphics font for use by Text_Print(). Use free() to dispose
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* of the font.
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*
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* INPUTS
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* Name - Name of font file to open.
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*
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* RESULT
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* Font - Pointer to font, NULL if error.
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*
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****************************************************************************/
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void *cdecl Load_Font(char const *name)
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{
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Font *font = NULL;
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long fh;
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short size;
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short valid;
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/* Open the font. */
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if ((fh = open(name, (O_RDONLY|O_BINARY))) != -1) {
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/* Get the size of the font. */
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if (read(fh, &size, 2) == 2) {
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/* Allocate memory to contain the font. */
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if ((font = (Font *)malloc((unsigned long)size)) != NULL) {
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valid = 0;
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/* Read in the body of the font. */
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if (read(fh, &font->CompMethod, (unsigned long)(size - 2))
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== (unsigned long)(size - 2)) {
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/* Verify the validity of the font. */
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if ((font->CompMethod == 0) && (font->NumBlks == 5)) {
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font->Size = size;
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valid = 1;
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}
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}
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/* Free the font if it is not valid. */
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if (valid == 0) {
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free(font);
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font = NULL;
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}
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}
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}
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/* Close the font. */
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close(fh);
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}
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return ((char *)font);
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}
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/****************************************************************************
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*
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* NAME
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* Set_Font - Set the default system font.
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*
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* SYNOPSIS
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* OldFont = Set_Font(Font)
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*
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* char *Set_Font(char *);
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*
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* FUNCTION
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* Sets up the specified font as the default font used by the system.
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*
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* INPUTS
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* Font - Pointer to Font to set as default. (NULL returns current font)
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*
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* RESULT
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* OldFont - Previous font.
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*
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****************************************************************************/
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void *cdecl Set_Font(void const *font)
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{
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void const *oldfont;
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FontInfo *fi;
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oldfont = FontPtr;
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if (font != NULL) {
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FontWidthBlockPtr = ((char *)font + ((Font *)font)->WidthBlk);
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fi = (FontInfo *)((char *)font + ((Font *)font)->InfoBlk);
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FontHeight = fi->MaxHeight;
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FontWidth = fi->MaxWidth;
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FontPtr = font;
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}
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return ((void *)oldfont);
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}
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/****************************************************************************
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*
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* NAME
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* String_Pixel_Width - Get the pixel width of a string.
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*
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* SYNOPSIS
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* Width = String_Pixel_Width(String)
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*
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* long String_Pixel_Width(char *);
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*
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* FUNCTION
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* Calculates the pixel width of a string of characters.
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*
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* INPUTS
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* String - Pointer to string to calculate width for.
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*
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* RESULT
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* Width - Width of string in pixels.
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*
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****************************************************************************/
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unsigned short String_Pixel_Width(char const *string)
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{
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long width = 0;
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long largest = 0;
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while (*string != NULL) {
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if (*string == '\r') {
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string++;
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largest = max(largest, width);
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width = 0;
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} else {
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width += Char_Pixel_Width(*string++);
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}
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}
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largest = max(largest, width);
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return (largest);
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}
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