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#!/usr/bin/nickle
typedef struct {
int[] bytes;
int width;
int height;
int encoding;
int location;
} glyph_t;
typedef struct {
glyph_t[...] glyphs;
int default_char;
int ascent;
} font_t;
glyph_t
read_glyph(file f)
{
glyph_t glyph = { .encoding = -1, .bytes = (int[...]){}, .width = 0 };
while (!File::end(f)) {
string l = fgets(f);
string[*] tokens = String::split(l, " ");
if (dim(tokens) == 0)
continue;
switch (tokens[0]) {
case "ENCODING":
glyph.encoding = atoi(tokens[1]);
break;
case "DWIDTH":
glyph.width = atoi(tokens[1]);
break;
case "BBX":
glyph.height = atoi(tokens[2]);
break;
case "ENDCHAR":
return glyph;
case "BITMAP":
while (!File::end(f)) {
string l = fgets(f);
if (l == "ENDCHAR")
return glyph;
glyph.bytes[dim(glyph.bytes)] = atoi(l, 16);
}
break;
}
}
return glyph;
}
font_t read_font(file f) {
font_t font = { .glyphs = {}, .default_char = -1 };
bool in_head = true;
while (in_head && !File::end(f)) {
string l = File::fgets(f);
string[*] tokens = String::split(l, " ");
switch (tokens[0]) {
case "DEFAULT_CHAR":
font.default_char = atoi(tokens[1]);
break;
case "FONT_ASCENT":
font.ascent = atoi(tokens[1]);
break;
case "CHARS":
in_head = false;
break;
}
}
while (!File::end(f)) {
glyph_t glyph = read_glyph(f);
if (glyph.encoding == -1)
break;
font.glyphs[dim(font.glyphs)] = glyph;
}
return font;
}
int
flip_byte(int x)
{
int dest = 0;
for (int i = 0; i < 8; i++)
dest |= ((x >> (7 - i)) & 1) << i;
return dest;
}
void print_font(font_t font) {
int width = font.glyphs[0].width;
int height = font.glyphs[0].height;
int[256] pos = { -1 ... };
int[...] bytes;
if (false) {
for (int i = 1; i < dim(font.glyphs); i++) {
if (font.glyphs[i].width != width ||
font.glyphs[i].height != height)
{
File::fprintf(stderr, "font not constant size, glyph %d is %dx%d\n",
font.glyphs[i].encoding, font.glyphs[i].width, font.glyphs[i].height);
exit(1);
}
}
}
if (font.default_char == -1)
font.default_char = font.glyphs[0].encoding;
/* build byte array */
for (int i = 0; i < dim(font.glyphs); i++) {
pos[font.glyphs[i].encoding] = dim(bytes);
for (int b = 0; b < dim(font.glyphs[i].bytes); b++)
bytes[dim(bytes)] = font.glyphs[i].bytes[b];
}
/* Fill in default glyph */
for (int i = 0; i < dim(pos); i++)
if (pos[i] == -1)
pos[i] = pos[font.default_char];
printf("static uint8_t glyph_bytes[] = {");
for (int b = 0; b < dim(bytes); b++) {
if ((b & 15) == 0)
printf("\n\t");
printf("0x%02x, ", flip_byte(bytes[b]));
}
printf("\n};\n\n");
printf("static uint16_t glyph_pos[] = {");
for (int i = 0; i < dim(pos); i++) {
if ((i & 7) == 0)
printf("\n\t");
printf("%4d, ", pos[i]);
}
printf("\n};\n\n");
printf("#define GLYPH_WIDTH %d\n", width);
printf("#define GLYPH_HEIGHT %d\n", height);
printf("#define GLYPH_ASCENT %d\n", font.ascent);
}
twixt (file f = File::open(argv[1], "r"); File::close(f)) {
font_t font = read_font(f);
print_font(font);
}
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