kolibrios/contrib/other/font_conv/convert.c
ashmew2 593bbd9e90 Changed font_conv/convert.c and shifted to contrib
git-svn-id: svn://kolibrios.org@4722 a494cfbc-eb01-0410-851d-a64ba20cac60
2014-03-31 07:25:24 +00:00

199 lines
5.6 KiB
C

/*
convert.c: converts text bitmaps into binary bitmaps.
This has been written with an aim to detect any errors that
might have crept in while generating a text bitmap for a font.
Copyright 2011 dunkaist <dunkaist@gmail.com>
Copyright 2014 ashmew2 <ashmew2@gmail.com>
Distributed under the terms of the GNU General Public License v3.
See http://www.gnu.org/licenses/gpl.txt for the full license text.
*/
/*
For TRANSLATION, only the hard coded strings such as in usage[] need to
rewritten in the desired language. The translation selection should be
inside an #if LANG == RUS {} #else {} block. All messsages are printed
using msg_printx() and the translations need to be done for all such
calls.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdarg.h>
#include <stdbool.h>
#define FONT_HEIGHT 9 /* The height of each symbol in input file */
#define FONT_WIDTH_MONO 5 /* Fixed width for mono fonts */
#define FONT_WIDTH_VAR 7 /* Max symbol width */
#define LINE_BUFFER_SIZE 12 /* For FONT_WIDTH_VAR and delimiters */
#define NUM_SYMBOLS 256 /* Number of symbols in input file */
enum error_code {
ERROR_PARSING_ARGS = 1,
ERROR_OPENING_FILE,
ERROR_INVALID_INPUT_FILE
};
void msg_printx(int errnum, char *message, ...)
{
va_list args;
va_start(args, message);
vfprintf(stderr, message, args);
va_end(args);
exit(errnum);
}
void usage_printx(char *prog_name)
{
char usage[] = "Usage: \n"
"\t%s <INPUTFILE> <OUTPUTFILE> <-m>\n\n"
"Converts font bitmaps from text to binary format.\n\n"
"\tINPUTFILE\t The input file containing text bitmap.\n"
"\tOUTPUTFILE\t The output file for writing binary bitmap.\n"
"\t-m\t Mono flag. -0 for mono. -1 otherwise.\n\n"
"Examples: \n"
"\t%s char.txt CHAR.MT -0\n"
"\t%s char2.txt CHAR2.MT -1\n\n"
"Exit status: \n"
"\t 0: Successful conversion.\n"
"\t 1: Incorrect arguments supplied to the command.\n"
"\t 2: Files could not be opened for read/write.\n"
"\t 3: Error(s) reading data from file.\n\n"
"This is a part of the font_conv program in KolibriOS.\n";
msg_printx(ERROR_PARSING_ARGS, usage, prog_name, prog_name, prog_name);
}
char* get_row(bool use_mono)
{
static int line_number = 1; /* Initialize to 1 for first line being read */
static size_t len_line;
static char line[LINE_BUFFER_SIZE];
size_t len;
char *current_line;
int i;
current_line = fgets(line, LINE_BUFFER_SIZE - 1, stdin);
if(!current_line)
msg_printx(ERROR_INVALID_INPUT_FILE, "Error: could not read line from input file.\n");
len = strlen(current_line);
if(len > 2)
{
if(line[len - 1] == '\n' && line[len - 2] == '\r')
len -= 2;
else if(line[len - 1] == '\n')
--len;
else if(line_number != ((FONT_HEIGHT + 1) * NUM_SYMBOLS)) /* if last line of input */
msg_printx(ERROR_INVALID_INPUT_FILE, "Error: line %d: no newline character found in first %d bytes.\n", 12 - 1, line_number);
line[--len] = '\0';
}
else
msg_printx(ERROR_INVALID_INPUT_FILE, "Error: line %d: line too short.\n", line_number);
if(line_number == 1) /* Processing first line in input */
{
if(len > FONT_WIDTH_VAR)
msg_printx(ERROR_INVALID_INPUT_FILE, "Error: line %d: length of line is larger than %d (maximum allowed width).\n", line_number, FONT_WIDTH_VAR);
if((use_mono) && (len != FONT_WIDTH_MONO))
msg_printx(ERROR_INVALID_INPUT_FILE, "Error: line %d: length of line is not equal to %d (mono font width).\n", line_number, FONT_WIDTH_MONO);
len_line = len;
}
else
{
if(len != len_line)
msg_printx(ERROR_INVALID_INPUT_FILE, "Error: line %d: length of line does not match length of first line in file.\n", line_number);
/*validate Row*/
for(i = 0; line[i]; i++)
if(!isprint(line[i]))
msg_printx(ERROR_INVALID_INPUT_FILE, "Error: line %d: non printable characters found on line.\n", line_number);
}
++line_number;
return line;
}
int do_symbol(short int font_width)
{
short int row, col;
int data;
for(row = FONT_HEIGHT; row; row--)
{
char *line = get_row(font_width == FONT_WIDTH_MONO);
data = 0; /* Create empty byte for storing line */
for(col = 0; col < font_width; col++)
{
if(line[col] != ' ')
data |= 1<<col; /* Get corresponding bit for non-space character */
}
putchar(data);
}
return 0;
}
int main(int argc, char *argv[])
{
char *input_file = NULL;
char *output_file = NULL;
short int char_num;
bool use_mono;
if(argc != 4) /* Required argc is 4, for three mandatory arguments. */
usage_printx(argv[0]);
else
{
if(!strcmp(argv[3],"-0"))
use_mono = true;
else if(!strcmp(argv[3],"-1"))
use_mono = false;
else
usage_printx(argv[0]);
}
input_file = argv[1];
output_file = argv[2];
if(!freopen(input_file, "rt", stdin))
msg_printx(ERROR_OPENING_FILE, "Error: unable to open %s for reading.\n", input_file);
if(!freopen(output_file, "wb", stdout))
msg_printx(ERROR_OPENING_FILE, "Error: unable to open %s for writing.\n", output_file);
for(char_num = NUM_SYMBOLS; char_num; char_num--)
{
char *line = get_row(use_mono);
if(use_mono)
{
do_symbol(FONT_WIDTH_MONO);
}
else
{
size_t len = strlen(line);
int p = line[len - 1];
putchar(p == ' '? 0x08 : p-47); /* Put a backspace character or a decimal digit */
do_symbol(FONT_WIDTH_VAR);
}
}
return 0;
}