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/*
BDF simple reader and printer (ASCII Support only)
include stdio.h stdlib.h string.h
Should define SBDF_IMPLEMENTATION in only one .c file
*/
typedef struct SBDF_Font SBDF_Font;
SBDF_Font* SBDF_FontLoad(const char *);
void SBDF_FontDestroy(SBDF_Font *);
void SBDF_GetSize(const SBDF_Font *, const char *, int *, int *, int *, int *);
#ifdef SBDF_USESDL
void SBDF_SDLPrint(const SDL_Renderer *, const SBDF_Font *, const char *, int, int);
#endif
#ifdef SBDF_IMPLEMENTATION
struct SBDF_Glyph {
int dx, dy;
int bx, by, bw, bh;
size_t s;
};
struct SBDF_Font {
struct SBDF_Glyph g[256];
unsigned char *data;
};
static struct SBDF_Font*
SBDF_FontInit(size_t sz) {
struct SBDF_Font *res;
int i;
res = malloc(sizeof(*res));
if (res == NULL) return NULL;
res->data = malloc(sz);
if (res->data == NULL) {
free(res);
return NULL;
}
for (i = 0; i < 256; i++) {
res->g[i].dx = 0;
res->g[i].dy = 0;
res->g[i].bx = 0;
res->g[i].by = 0;
res->g[i].bw = 0;
res->g[i].bh = 0;
res->g[i].s = -1;
}
return res;
}
void
SBDF_FontDestroy(struct SBDF_Font *f) {
if (f == NULL) return;
free(f->data);
free(f);
}
#define SBDF_NULL 0x00000
#define SBDF_PROPS 0x00010
#define SBDF_CHARS 0x00100
#define SBDF_GLYPH 0x01100
struct SBDF_Font*
SBDF_FontLoad(const char *path) {
FILE *f;
int cnt, rd, tp;
struct SBDF_Glyph g;
size_t sz;
char line[2049];
char word[2049];
char *v;
unsigned char val;
int state;
struct SBDF_Font *res;
res = NULL;
f = fopen(path, "r");
if (f == NULL) goto SBDF_FontLoad_defer;
state = SBDF_NULL;
rd = cnt = sz = 0;
while (fgets(line, 2049, f)) {
if ((state&SBDF_CHARS) == 0) {
sscanf(line, "%s", word);
if (state == SBDF_PROPS) {
if (strcmp(word, "ENDPROPERTIES") == 0)
state = SBDF_NULL;
} else {
if (strcmp(word, "STARTPROPERTIES") == 0)
state = SBDF_PROPS;
else if (strcmp(word, "CHARS") == 0)
state = SBDF_CHARS;
}
continue;
} else {
sscanf(line, "%s", word);
if (cnt) {
--cnt;
continue;
}
if (strcmp(word, "ENCODING") == 0) {
sscanf(line, "%*s %d", &tp);
rd = (tp > -1 && tp < 256);
continue;
}
if (strcmp(word, "DWIDTH") == 0) {
sscanf(line, "%*s %d %d", &g.dx, &g.dy);
continue;
}
if (strcmp(word, "BBX") == 0) {
sscanf(line, "%*s %d %d %d %d", &g.bw, &g.bh, &g.bx, &g.by);
if (rd) {
sz += (g.bw+7) / 8 * g.bh;
}
continue;
}
if (strcmp(word, "BITMAP") == 0) {
cnt = g.bh;
continue;
}
}
}
fclose(f);
res = SBDF_FontInit(sz);
if (res == NULL) goto SBDF_FontLoad_defer;
f = fopen(path, "r");
if (f == NULL) goto SBDF_FontLoad_defer;
state = SBDF_NULL;
rd = cnt = sz = 0;
while (fgets(line, 2049, f)) {
if ((state&SBDF_CHARS) == 0) {
sscanf(line, "%s", word);
if (state == SBDF_PROPS) {
if (strcmp(word, "ENDPROPERTIES") == 0)
state = SBDF_NULL;
} else {
if (strcmp(word, "STARTPROPERTIES") == 0)
state = SBDF_PROPS;
else if (strcmp(word, "CHARS") == 0)
state = SBDF_CHARS;
}
continue;
} else {
sscanf(line, "%s", word);
if (cnt) {
--cnt;
if (rd) {
v = word;
while (v[0] != '\0') {
if (v[0] <= '9')
val = (unsigned char)16*(v[0] - '0');
else
val = (unsigned char)16*(v[0] - 'A' + 10);
if (v[1] <= '9')
val += (unsigned char)(v[1] - '0');
else
val += (unsigned char)(v[1] - 'A' + 10);
res->data[sz] = val;
sz++;
v += 2;
}
}
continue;
}
if (strcmp(word, "ENCODING") == 0) {
sscanf(line, "%*s %d", &tp);
rd = (tp > -1 && tp < 256);
continue;
}
if (strcmp(word, "DWIDTH") == 0) {
sscanf(line, "%*s %d %d", &g.dx, &g.dy);
continue;
}
if (strcmp(word, "BBX") == 0) {
sscanf(line, "%*s %d %d %d %d", &g.bw, &g.bh, &g.bx, &g.by);
continue;
}
if (strcmp(word, "BITMAP") == 0) {
cnt = g.bh;
if (rd) {
g.s = sz;
res->g[tp] = g;
}
continue;
}
}
}
return res;
SBDF_FontLoad_defer:
if (f != NULL)
fclose(f);
SBDF_FontDestroy(res);
return NULL;
}
void
SBDF_GetSize(const struct SBDF_Font *f, const char *text, int *tx, int *ty, int *w, int *h) {
char *u;
int minw, minh, maxw, maxh, x, y;
x = y = minw = minh = maxw = maxh = 0;
u = text;
while (*u != '\0') {
x += f->g[(unsigned char)*u].bx;
y += f->g[(unsigned char)*u].by;
minw = (minw < x) ? minw : x;
minh = (minh < y) ? minh : y;
maxw = (maxw > x + f->g[(unsigned char)*u].bw) ? maxw : (x + f->g[(unsigned char)*u].bw);
maxh = (maxh > y + f->g[(unsigned char)*u].bh) ? maxh : (y + f->g[(unsigned char)*u].bh);
x += f->g[(unsigned char)*u].dx - f->g[(unsigned char)*u].bx;
y += f->g[(unsigned char)*u].dy - f->g[(unsigned char)*u].by;
u++;
}
if (tx != NULL) *tx = minw;
if (ty != NULL) *ty = minh;
if (w != NULL) *w = maxw;
if (h != NULL) *h = maxh;
}
#ifdef SBDF_USESDL
void
SBDF_SDLPrint(const SDL_Renderer *r, const struct SBDF_Font *f, const char *text, int x, int y) {
char *u;
unsigned char *v;
int i, j;
u = text;
while (*u != '\0') {
v = &f->data[f->g[(unsigned char)*u].s];
x += f->g[(unsigned char)*u].bx;
y -= f->g[(unsigned char)*u].by + f->g[(unsigned char)*u].bh;
for (i = 0; i < f->g[(unsigned char)*u].bh; i++) {
for (j = 0; j < f->g[(unsigned char)*u].bw; j++) {
if (v[j/8]>>(7-(j%8))&1)
SDL_RenderDrawPoint(r, x+j, y+i);
}
v += (j + 7) / 8;
}
x += f->g[(unsigned char)*u].dx - f->g[(unsigned char)*u].bx;
y += f->g[(unsigned char)*u].dy + f->g[(unsigned char)*u].by + f->g[(unsigned char)*u].bh;
u++;
}
}
#endif
#endif
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