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#include "font.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <wchar.h>
#include <locale.h>
/* CAUTION: REQUIRES INPUT TO BE \0-TERMINATED */
int console_render(char *s, glyph_t **glyph_table, unsigned int glyph_table_size){
unsigned int len = strlen(s);
uint8_t *gbuf = NULL;
unsigned int gbufwidth = 0;
unsigned int gbufheight = 0;
char *p = s;
wchar_t c;
mbstate_t ps = {0};
memset(&ps, 0, sizeof(mbstate_t));
if(!setlocale(LC_CTYPE, "en_US.utf8")){
fprintf(stderr, "Cannot set locale\n");
goto error;
}
for(;;){
size_t inc = mbrtowc(&c, p, MB_CUR_MAX, &ps); // MB_CUR_MAX is safe since p is \0-terminated
if(inc == -1 || inc == -2){
fprintf(stderr, "Error rendering string: No valid UTF-8 input.\n");
goto error;
}
if(inc == 0) // Reached end of string
break;
p += inc;
if(c > glyph_table_size){
fprintf(stderr, "Error rendering string: Codepoint 0x%lx out of valid range (0-%d).\n", (long int)c, glyph_table_size);
goto error;
}
glyph_t *g = glyph_table[c];
if(!g){
fprintf(stderr, "Error rendering string: Codepoint 0x%lx not in font.\n", (long int)c);
goto error;
}
if(g->height > gbufheight)
gbufheight = g->height;
gbufwidth += g->width;
}
// For easier rendering on the terminal, round up to multiples of two
gbufheight += gbufheight&1;
unsigned int gbufsize = gbufwidth*gbufheight;
gbuf = malloc(gbufsize);
if(gbuf == 0){
fprintf(stderr, "Cannot malloc() %d bytes.\n", gbufsize);
goto error;
}
memset(gbuf, 0, gbufsize);
unsigned int x = 0;
p = s;
memset(&ps, 0, sizeof(mbstate_t));
for(;;){
size_t inc = mbrtowc(&c, p, (s+len+1)-p, NULL);
// If p contained
if(inc == 0) // Reached end of string
break;
p += inc;
glyph_t *g = glyph_table[c];
render_glyph(g, gbuf, gbufwidth, x, 0);
x += g->width;
}
for(unsigned int y=0; y < gbufheight; y+=2){
for(unsigned int x=0; x < gbufwidth; x++){
//Da magicks: ▀█▄
char c1 = gbuf[y*gbufwidth + x];
char c2 = gbuf[(y+1)*gbufwidth + x];
if(c1 && c2)
printf("█");
else if(c1 && !c2)
printf("▀");
else if(!c1 && c2)
printf("▄");
else
printf(" ");
}
printf("\n");
}
return 0;
error:
free(gbuf);
return 1;
}
int main(int argc, char **argv){
FILE *f = fopen("unifont.bdf", "r");
if(!f){
fprintf(stderr, "Error opening font file: %s\n", strerror(errno));
return 1;
}
glyph_t* glyph_table[BLP_SIZE];
if(read_bdf(f, glyph_table, BLP_SIZE)){
fprintf(stderr, "Error reading font file.\n");
return 1;
}
for(unsigned int i=1; i<argc; i++){
if(console_render(argv[i], glyph_table, BLP_SIZE)){
fprintf(stderr, "Error rendering text.\n");
return 1;
}
printf("\n");
}
return 0;
}
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