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110 lines
3.3 KiB
C
110 lines
3.3 KiB
C
/* Implements the font handling of the Super VMW Graph Library */
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#include "svmwgraph.h"
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#include <stdio.h> /* For File I/O */
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#include <stdlib.h> /* For malloc/calloc */
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#include <string.h> /* strlen() */
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/* The font used is a standard VGA font. */
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/* To use the "smallText" functions, the VGA font */
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/* has to have a smaller (4x5) version of the */
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/* font from chars 0-127 mirrored at 128-255 */
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vmwFont *vmwLoadFont(char *namest,int xsize,int ysize,int numchars)
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{
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unsigned char buff[16];
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FILE *f;
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int i,fonty,numloop;
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vmwFont *font;
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char *data;
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font=(vmwFont *)malloc(sizeof(vmwFont));
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data=(char *)calloc(numchars*ysize,(sizeof(char)));
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f=fopen(namest,"r");
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if (f==NULL) {
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printf("ERROR loading font file %s.\n",namest);
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return NULL;
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}
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numloop=(numchars*ysize);
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font->width=xsize;
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font->height=ysize;
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font->numchars=numchars;
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font->font_data=data;
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fonty=0;
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while ( (!feof(f))&&(fonty<numloop)) {
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fread(buff,1,16,f);
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for(i=0;i<16;i++) font->font_data[fonty+i]=buff[i];
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fonty+=16;
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}
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fclose(f);
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return font;
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}
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/* Write a one-pixel cross section from location 'line' */
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/* of text at location x,y */
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/* using color 'col' and background 'col' */
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/* using 'background' as a background color if */
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/* 'transprent' not set. */
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void vmwTextLine(char *st,int x,int y,int col,int background,int line,
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int transparent,vmwFont *font,vmwVisual *target)
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{
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int i,xx,len;
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len=strlen(st);
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for(i=0;i<len;i++)
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for(xx=0;xx<8;xx++){
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if ( (font->font_data[(st[i]*font->height)+line])&(128>>xx) )
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vmwPutPixel((x+(i*8)+xx),y,col,target);
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else
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if (!transparent) vmwPutPixel((x+(i*8)+xx),y,background,target);
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}
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}
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/* Output a string at location x,y */
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void vmwTextXY(char *st,int x,int y,int col,int background,int overwrite,
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vmwFont *font,vmwVisual *target)
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{
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int lineon,i,xx,len;
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len=strlen(st);
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for(lineon=0;lineon<8;lineon++){
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for(i=0;i<len;i++)
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for(xx=0;xx<8;xx++){
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if ( (font->font_data[(st[i]*font->height)+lineon])&(128>>xx) )
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vmwPutPixel((x+(i*8)+xx),y+lineon,col,target);
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else
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if (overwrite)
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vmwPutPixel((x+(i*8)+xx),y+lineon,background,target);
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}
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}
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}
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/* Assume this is a special font with a "small" font at locations */
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/* 128-255 and display the string */
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void vmwSmallTextXY(char *st,int x,int y,int col,int background,int overwrite,
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vmwFont *font,vmwVisual *target)
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{
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int lineon,i,xx,len;
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/* This will print out a small 4x5 font located in chars */
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/* 128-255 in a normal VGA font. These are custom made */
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/* fonts; they are non-standard */
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len=strlen(st);
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for(lineon=0;lineon<5;lineon++) {
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for(i=0;i<len;i++)
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for(xx=0;xx<5;xx++) {
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if ( (font->font_data[((st[i]+128)*font->height)+lineon])
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&(128>>xx) )
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vmwPutPixel((x+(i*5)+xx),y+lineon,col,target);
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else
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if (overwrite)
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vmwPutPixel((x+(i*5)+xx),y+lineon,background,target);
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}
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}
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}
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