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/* See LICENSE file for copyright and license details. */
#include "libparsepsf.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static size_t
readfile(int fd, char **datap, size_t *sizep)
{
size_t len = 0;
ssize_t r;
for (;;) {
if (len == *sizep) {
*datap = realloc(*datap, *sizep += 4096);
if (!*datap) {
perror("realloc");
exit(1);
}
}
r = read(fd, &(*datap)[len], *sizep - len);
if (r <= 0) {
if (!r)
break;
perror("read");
exit(1);
}
len += (size_t)r;
}
return len;
}
static uint8_t *
genreplacement(const struct libparsepsf_font *font)
{
size_t glyph, size, i, linesize, xoff, yoff;
int invert = 0, round = 0;
uint8_t *data, xbit;
glyph = libparsepsf_get_glyph(font, "�", NULL, NULL);
if (!glyph) {
invert = 1;
round = 1;
glyph = libparsepsf_get_glyph(font, "?", NULL, NULL);
if (!glyph) {
round = 0;
glyph = libparsepsf_get_glyph(font, " ", NULL, NULL);
}
}
glyph -= (glyph ? 1 : 0);
linesize = font->width / 8 + (font->width % 8 ? 1 : 0);
size = linesize * font->height;
data = malloc(size);
if (!data) {
perror("malloc");
exit(1);
}
memcpy(data, &font->glyph_data[glyph * size], size);
if (invert)
for (i = 0; i < size; i++)
data[i] ^= 0xFF;
if (round) {
yoff = (font->height - 1) * linesize;
xoff = (font->width - 1) / 8;
xbit = 0x80 >> ((font->width - 1) % 8);
data[0] ^= 0x80;
data[yoff] ^= 0x80;
data[xoff] ^= xbit;
data[yoff + xoff] ^= xbit;
}
return data;
}
static void
printglyphrow(const struct libparsepsf_font *font, const uint8_t *gd, const char *bg, const char *fg)
{
uint8_t bit;
size_t x;
bit = 0x80;
for (x = 0; x < font->width; x++) {
printf("%s", (*gd & bit) ? fg : bg);
bit >>= 1;
if (!bit) {
bit = 0x80;
gd = &gd[1];
}
}
}
static void
printglyph(const struct libparsepsf_font *font, size_t glyph, const char *bg, const char *fg)
{
const uint8_t *gd;
size_t width = font->width / 8 + (font->width % 8 ? 1 : 0);
size_t glyphsize = width * font->height;
size_t y;
if (glyph > font->num_glyphs) {
fprintf(stderr, "glyph does not exist!\n");
exit(1);
}
for (y = 0; y < font->height; y++) {
gd = &font->glyph_data[glyph * glyphsize + y * width];
printglyphrow(font, gd, bg, fg);
printf("\033[0m\n");
}
}
static void
printline(const struct libparsepsf_font *font, const char *line, size_t linelen)
{
const char *c, *bg, *fg;
const uint8_t *gd;
size_t width = font->width / 8 + (font->width % 8 ? 1 : 0);
size_t glyphsize = width * font->height;
size_t glyph, rem, y;
uint8_t *replacement = genreplacement(font);
for (y = 0; y < font->height; y++) {
rem = linelen;
for (c = line; rem;) {
glyph = libparsepsf_get_glyph(font, c, &rem, &c);
if (!glyph) {
do {
c = &c[1];
rem -= 1;
} while ((*c & 0xC0) == 0x80);
bg = "\033[1;30;40m[]";
fg = "\033[1;31;41m[]";
gd = &replacement[y * width];
} else {
glyph -= 1;
bg = "\033[1;30;40m[]";
fg = "\033[1;37;47m[]";
gd = &font->glyph_data[glyph * glyphsize + y * width];
}
printglyphrow(font, gd, bg, fg);
}
printf("\033[0m\n");
}
free(replacement);
}
int
main(int argc, char *argv[])
{
unsigned long int glyph;
uint32_t uver;
char *data = NULL;
size_t len, size = 0;
struct libparsepsf_font font;
if (argc) {
argc--;
argv++;
}
len = readfile(STDIN_FILENO, &data, &size);
if (libparsepsf_parse_font(data, len, &font, &uver)) {
perror("libparsepsf_parse_font");
free(data);
exit(1);
}
free(data);
if (uver) {
fprintf(stderr, "WARNING: Font format version is not fully supported: "
"version 2.%lu\n", (unsigned long int)uver);
}
printf("#glyphs = %zu\n", font.num_glyphs);
printf("width = %zu\n", font.width);
printf("height = %zu\n", font.height);
if (!argc) {
printline(&font, "", 1);
} else if (argc == 2 && !strcmp(argv[0], "-g")) {
glyph = strtoul(argv[1], NULL, 0);
printglyph(&font, (size_t)glyph, "\033[1;30;40m[]", "\033[1;37;47m[]");
} else if (argc == 2 && !strcmp(argv[0], "-x")) {
glyph = strtoul(argv[1], NULL, 16);
printglyph(&font, (size_t)glyph, "\033[1;30;40m[]", "\033[1;37;47m[]");
} else {
for (; argc--; argv++)
printline(&font, *argv, strlen(*argv));
}
libparsepsf_destroy_font(&font);
return 0;
}
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