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freebsd/usr.bin/vtfontcvt/vtfontcvt.c
Ed Maste 0dfe37f8f3 Remove redundant return statement after errx
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
2014-07-21 17:43:37 +00:00

568 lines
13 KiB
C

/*-
* Copyright (c) 2009, 2014 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Ed Schouten under sponsorship from the
* FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/fnv_hash.h>
#include <sys/endian.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <assert.h>
#include <err.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define VFNT_MAPS 4
#define VFNT_MAP_NORMAL 0
#define VFNT_MAP_NORMAL_RH 1
#define VFNT_MAP_BOLD 2
#define VFNT_MAP_BOLD_RH 3
static unsigned int width = 8, wbytes, height = 16;
struct glyph {
TAILQ_ENTRY(glyph) g_list;
SLIST_ENTRY(glyph) g_hash;
uint8_t *g_data;
unsigned int g_index;
};
#define FONTCVT_NHASH 4096
TAILQ_HEAD(glyph_list, glyph);
static SLIST_HEAD(, glyph) glyph_hash[FONTCVT_NHASH];
static struct glyph_list glyphs[VFNT_MAPS] = {
TAILQ_HEAD_INITIALIZER(glyphs[0]),
TAILQ_HEAD_INITIALIZER(glyphs[1]),
TAILQ_HEAD_INITIALIZER(glyphs[2]),
TAILQ_HEAD_INITIALIZER(glyphs[3]),
};
static unsigned int glyph_total, glyph_count[4], glyph_unique, glyph_dupe;
struct mapping {
TAILQ_ENTRY(mapping) m_list;
unsigned int m_char;
unsigned int m_length;
struct glyph *m_glyph;
};
TAILQ_HEAD(mapping_list, mapping);
static struct mapping_list maps[VFNT_MAPS] = {
TAILQ_HEAD_INITIALIZER(maps[0]),
TAILQ_HEAD_INITIALIZER(maps[1]),
TAILQ_HEAD_INITIALIZER(maps[2]),
TAILQ_HEAD_INITIALIZER(maps[3]),
};
static unsigned int mapping_total, map_count[4], map_folded_count[4],
mapping_unique, mapping_dupe;
static void
usage(void)
{
(void)fprintf(stderr,
"usage: vtfontcvt [-w width] [-h height] [-v] normal.bdf [bold.bdf] out.fnt\n");
exit(1);
}
static int
add_mapping(struct glyph *gl, unsigned int c, unsigned int map_idx)
{
struct mapping *mp;
struct mapping_list *ml;
mapping_total++;
mp = malloc(sizeof *mp);
mp->m_char = c;
mp->m_glyph = gl;
mp->m_length = 0;
ml = &maps[map_idx];
if (TAILQ_LAST(ml, mapping_list) != NULL &&
TAILQ_LAST(ml, mapping_list)->m_char >= c)
errx(1, "Bad ordering at character %u\n", c);
TAILQ_INSERT_TAIL(ml, mp, m_list);
map_count[map_idx]++;
mapping_unique++;
return (0);
}
static int
dedup_mapping(unsigned int map_idx)
{
struct mapping *mp_bold, *mp_normal, *mp_temp;
unsigned normal_map_idx = map_idx - VFNT_MAP_BOLD;
assert(map_idx == VFNT_MAP_BOLD || map_idx == VFNT_MAP_BOLD_RH);
mp_normal = TAILQ_FIRST(&maps[normal_map_idx]);
TAILQ_FOREACH_SAFE(mp_bold, &maps[map_idx], m_list, mp_temp) {
while (mp_normal->m_char < mp_bold->m_char)
mp_normal = TAILQ_NEXT(mp_normal, m_list);
if (mp_bold->m_char != mp_normal->m_char)
errx(1, "Character %u not in normal font!\n",
mp_bold->m_char);
if (mp_bold->m_glyph != mp_normal->m_glyph)
continue;
/* No mapping is needed if it's equal to the normal mapping. */
TAILQ_REMOVE(&maps[map_idx], mp_bold, m_list);
free(mp_bold);
mapping_dupe++;
}
return (0);
}
static struct glyph *
add_glyph(const uint8_t *bytes, unsigned int map_idx, int fallback)
{
struct glyph *gl;
int hash;
glyph_total++;
glyph_count[map_idx]++;
hash = fnv_32_buf(bytes, wbytes * height, FNV1_32_INIT) % FONTCVT_NHASH;
SLIST_FOREACH(gl, &glyph_hash[hash], g_hash) {
if (memcmp(gl->g_data, bytes, wbytes * height) == 0) {
glyph_dupe++;
return (gl);
}
}
gl = malloc(sizeof *gl);
gl->g_data = malloc(wbytes * height);
memcpy(gl->g_data, bytes, wbytes * height);
if (fallback)
TAILQ_INSERT_HEAD(&glyphs[map_idx], gl, g_list);
else
TAILQ_INSERT_TAIL(&glyphs[map_idx], gl, g_list);
SLIST_INSERT_HEAD(&glyph_hash[hash], gl, g_hash);
glyph_unique++;
return (gl);
}
static int
add_char(unsigned curchar, unsigned map_idx, uint8_t *bytes, uint8_t *bytes_r)
{
struct glyph *gl;
/* Prevent adding two glyphs for 0xFFFD */
if (curchar == 0xFFFD) {
if (map_idx < VFNT_MAP_BOLD)
gl = add_glyph(bytes, 0, 1);
} else if (curchar >= 0x20) {
gl = add_glyph(bytes, map_idx, 0);
if (add_mapping(gl, curchar, map_idx) != 0)
return (1);
if (bytes_r != NULL) {
gl = add_glyph(bytes_r, map_idx + 1, 0);
if (add_mapping(gl, curchar,
map_idx + 1) != 0)
return (1);
}
}
return (0);
}
static int
parse_bitmap_line(uint8_t *left, uint8_t *right, unsigned int line,
unsigned int dwidth)
{
uint8_t *p;
unsigned int i, subline;
if (dwidth != width && dwidth != width * 2)
errx(1, "Bitmap with unsupported width %u!\n", dwidth);
/* Move pixel data right to simplify splitting double characters. */
line >>= (howmany(dwidth, 8) * 8) - dwidth;
for (i = dwidth / width; i > 0; i--) {
p = (i == 2) ? right : left;
subline = line & ((1 << width) - 1);
subline <<= (howmany(width, 8) * 8) - width;
if (wbytes == 1) {
*p = subline;
} else if (wbytes == 2) {
*p++ = subline >> 8;
*p = subline;
} else {
errx(1, "Unsupported wbytes %u!\n", wbytes);
}
line >>= width;
}
return (0);
}
static int
parse_bdf(FILE *fp, unsigned int map_idx)
{
char *ln;
size_t length;
uint8_t bytes[wbytes * height], bytes_r[wbytes * height];
unsigned int curchar = 0, dwidth = 0, i, line;
while ((ln = fgetln(fp, &length)) != NULL) {
ln[length - 1] = '\0';
if (strncmp(ln, "ENCODING ", 9) == 0) {
curchar = atoi(ln + 9);
}
if (strncmp(ln, "DWIDTH ", 7) == 0) {
dwidth = atoi(ln + 7);
}
if (strncmp(ln, "BITMAP", 6) == 0 &&
(ln[6] == ' ' || ln[6] == '\0')) {
for (i = 0; i < height; i++) {
if ((ln = fgetln(fp, &length)) == NULL)
errx(1, "Unexpected EOF!\n");
ln[length - 1] = '\0';
sscanf(ln, "%x", &line);
if (parse_bitmap_line(bytes + i * wbytes,
bytes_r + i * wbytes, line, dwidth) != 0)
return (1);
}
if (add_char(curchar, map_idx, bytes,
dwidth == width * 2 ? bytes_r : NULL) != 0)
return (1);
}
}
return (0);
}
static void
set_width(int w)
{
if (w <= 0 || w > 128)
errx(1, "invalid width %d", w);
width = w;
wbytes = howmany(width, 8);
}
static int
parse_hex(FILE *fp, unsigned int map_idx)
{
char *ln, *p;
char fmt_str[8];
size_t length;
uint8_t bytes[wbytes * height], bytes_r[wbytes * height];
unsigned curchar = 0, i, line, chars_per_row, dwidth;
while ((ln = fgetln(fp, &length)) != NULL) {
ln[length - 1] = '\0';
if (strncmp(ln, "# Height: ", 10) == 0) {
height = atoi(ln + 10);
} else if (strncmp(ln, "# Width: ", 9) == 0) {
set_width(atoi(ln + 9));
} else if (sscanf(ln, "%4x:", &curchar)) {
p = ln + 5;
chars_per_row = strlen(p) / height;
dwidth = width;
if (chars_per_row / 2 > (width + 7) / 8)
dwidth *= 2; /* Double-width character. */
snprintf(fmt_str, sizeof(fmt_str), "%%%ux",
chars_per_row);
for (i = 0; i < height; i++) {
sscanf(p, fmt_str, &line);
p += chars_per_row;
if (parse_bitmap_line(bytes + i * wbytes,
bytes_r + i * wbytes, line, dwidth) != 0)
return (1);
}
if (add_char(curchar, map_idx, bytes,
dwidth == width * 2 ? bytes_r : NULL) != 0)
return (1);
}
}
return (0);
}
static int
parse_file(const char *filename, unsigned int map_idx)
{
FILE *fp;
size_t len;
int rv;
fp = fopen(filename, "r");
if (fp == NULL) {
perror(filename);
return (1);
}
len = strlen(filename);
if (len > 4 && strcasecmp(filename + len - 4, ".hex") == 0)
rv = parse_hex(fp, map_idx);
else
rv = parse_bdf(fp, map_idx);
fclose(fp);
return (rv);
}
static void
number_glyphs(void)
{
struct glyph *gl;
unsigned int i, idx = 0;
for (i = 0; i < VFNT_MAPS; i++)
TAILQ_FOREACH(gl, &glyphs[i], g_list)
gl->g_index = idx++;
}
static int
write_glyphs(FILE *fp)
{
struct glyph *gl;
unsigned int i;
for (i = 0; i < VFNT_MAPS; i++) {
TAILQ_FOREACH(gl, &glyphs[i], g_list)
if (fwrite(gl->g_data, wbytes * height, 1, fp) != 1)
return (1);
}
return (0);
}
static void
fold_mappings(unsigned int map_idx)
{
struct mapping_list *ml = &maps[map_idx];
struct mapping *mn, *mp, *mbase;
mp = mbase = TAILQ_FIRST(ml);
for (mp = mbase = TAILQ_FIRST(ml); mp != NULL; mp = mn) {
mn = TAILQ_NEXT(mp, m_list);
if (mn != NULL && mn->m_char == mp->m_char + 1 &&
mn->m_glyph->g_index == mp->m_glyph->g_index + 1)
continue;
mbase->m_length = mp->m_char - mbase->m_char + 1;
mbase = mp = mn;
map_folded_count[map_idx]++;
}
}
struct file_mapping {
uint32_t source;
uint16_t destination;
uint16_t length;
} __packed;
static int
write_mappings(FILE *fp, unsigned int map_idx)
{
struct mapping_list *ml = &maps[map_idx];
struct mapping *mp;
struct file_mapping fm;
unsigned int i = 0, j = 0;
TAILQ_FOREACH(mp, ml, m_list) {
j++;
if (mp->m_length > 0) {
i += mp->m_length;
fm.source = htobe32(mp->m_char);
fm.destination = htobe16(mp->m_glyph->g_index);
fm.length = htobe16(mp->m_length - 1);
if (fwrite(&fm, sizeof fm, 1, fp) != 1)
return (1);
}
}
assert(i == j);
return (0);
}
struct file_header {
uint8_t magic[8];
uint8_t width;
uint8_t height;
uint16_t pad;
uint32_t glyph_count;
uint32_t map_count[4];
} __packed;
static int
write_fnt(const char *filename)
{
FILE *fp;
struct file_header fh = {
.magic = "VFNT0002",
};
fp = fopen(filename, "wb");
if (fp == NULL) {
perror(filename);
return (1);
}
fh.width = width;
fh.height = height;
fh.glyph_count = htobe32(glyph_unique);
fh.map_count[0] = htobe32(map_folded_count[0]);
fh.map_count[1] = htobe32(map_folded_count[1]);
fh.map_count[2] = htobe32(map_folded_count[2]);
fh.map_count[3] = htobe32(map_folded_count[3]);
if (fwrite(&fh, sizeof fh, 1, fp) != 1) {
perror(filename);
fclose(fp);
return (1);
}
if (write_glyphs(fp) != 0 ||
write_mappings(fp, VFNT_MAP_NORMAL) != 0 ||
write_mappings(fp, 1) != 0 ||
write_mappings(fp, VFNT_MAP_BOLD) != 0 ||
write_mappings(fp, 3) != 0) {
perror(filename);
fclose(fp);
return (1);
}
fclose(fp);
return (0);
}
static void
print_font_info(void)
{
printf(
"Statistics:\n"
"- glyph_total: %5u\n"
"- glyph_normal: %5u\n"
"- glyph_normal_right: %5u\n"
"- glyph_bold: %5u\n"
"- glyph_bold_right: %5u\n"
"- glyph_unique: %5u\n"
"- glyph_dupe: %5u\n"
"- mapping_total: %5u\n"
"- mapping_normal: %5u\n"
"- mapping_normal_folded: %5u\n"
"- mapping_normal_right: %5u\n"
"- mapping_normal_right_folded: %5u\n"
"- mapping_bold: %5u\n"
"- mapping_bold_folded: %5u\n"
"- mapping_bold_right: %5u\n"
"- mapping_bold_right_folded: %5u\n"
"- mapping_unique: %5u\n"
"- mapping_dupe: %5u\n",
glyph_total,
glyph_count[0],
glyph_count[1],
glyph_count[2],
glyph_count[3],
glyph_unique, glyph_dupe,
mapping_total,
map_count[0], map_folded_count[0],
map_count[1], map_folded_count[1],
map_count[2], map_folded_count[2],
map_count[3], map_folded_count[3],
mapping_unique, mapping_dupe);
}
int
main(int argc, char *argv[])
{
int ch, val, verbose = 0;
assert(sizeof(struct file_header) == 32);
assert(sizeof(struct file_mapping) == 8);
while ((ch = getopt(argc, argv, "h:vw:")) != -1) {
switch (ch) {
case 'h':
val = atoi(optarg);
if (val <= 0 || val > 128)
errx(1, "Invalid height %d", val);
height = val;
break;
case 'v':
verbose = 1;
break;
case 'w':
set_width(atoi(optarg));
break;
case '?':
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc < 2 || argc > 3)
usage();
wbytes = howmany(width, 8);
if (parse_file(argv[0], VFNT_MAP_NORMAL) != 0)
return (1);
argc--;
argv++;
if (argc == 2) {
if (parse_file(argv[0], VFNT_MAP_BOLD) != 0)
return (1);
argc--;
argv++;
}
number_glyphs();
dedup_mapping(VFNT_MAP_BOLD);
dedup_mapping(VFNT_MAP_BOLD_RH);
fold_mappings(0);
fold_mappings(1);
fold_mappings(2);
fold_mappings(3);
if (write_fnt(argv[0]) != 0)
return (1);
if (verbose)
print_font_info();
return (0);
}