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//
// just read an .tab file
//
// do necessary stretching
//
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "../src/cthugha.h"
#include "../src/cth_buffer.h"
#include "../src/imath.h"
#include "../src/tab_header.h"
int BUFF_WIDTH = 0;
int BUFF_HEIGHT = 0;
int readLine(long * line, int n, int big, FILE * in) {
union data {
long * l;
short * s;
} D;
int size = big ? sizeof(long) : sizeof(short);
long tmp[n];
D.l = tmp;
/* read data */
if( fread(tmp, size, n, in) < (size_t)n) {
fprintf(stderr, "cmdRead: Reading failed.\n");
return 1;
}
for(int i=0; i < n; i++) {
line[i] = (big) ? D.l[i] : D.s[i];
}
return 0;
}
int main(int argc, char * argv[]) {
int stretch = 0;
FILE * in = stdin;
FILE * out = stdout;
int pipe = 0;
if(argc < 3) {
fprintf(stderr, "usage: cmdRead WIDTH HEIGHT [-s] [in] [out]\n"
" -s allow stretching\n"
" in .tab file (can be compressed)\n"
" out converted data\n");
return 1;
}
BUFF_WIDTH = atoi(argv[1]);
BUFF_HEIGHT = atoi(argv[2]);
if(argc > 3) {
if( strcmp(argv[3], "-s") == 0) {
stretch = 1;
argv ++;
argc --;
}
}
if(argc > 3) {
if( strcmp(argv[3], "-") == 0)
in = stdin;
else {
if( strstr(argv[3], ".gz") != NULL) {
char cmd[PATH_MAX];
sprintf(cmd, "gzip -cd \"%s\"", argv[3]);
in = popen(cmd, "r");
pipe = 1;
} else
in = fopen(argv[3], "r");
}
}
if(argc > 4) {
out = (strcmp(argv[3], "-") == 0) ? stdout : fopen(argv[4], "r");
}
if(in == NULL) {
fprintf(stderr, "cmdRead: can not open input file '%s'.\n", argv[3] );
return 1;
}
if(out == NULL) {
fprintf(stderr, "cmdRead: can not open output file.\n");
return 1;
}
//
// try to read a header
//
tab_header header;
if ( fread( &header, sizeof(tab_header), 1, in) != 1) {
fprintf(stderr, "cmdRead: Can't read header.\n");
return 1;
}
/* check header ID */
if ( header.id != *((long*)"HDKB")) {
fprintf(stderr, "cmdRead: Old style .tab file without header.\n");
rewind(in); // back to start of file
/* fill in header */
header.size_x = BUFF_WIDTH;
header.size_y = BUFF_HEIGHT;
}
int big = (header.size_x * header.size_y) > 65535;
//
// check if stretching is necessary
//
if( (header.size_x == BUFF_WIDTH) && (header.size_y == BUFF_HEIGHT)) {
// size matches
long line[BUFF_WIDTH];
for(int i=0; i < BUFF_HEIGHT; i++) {
if( readLine(line, BUFF_WIDTH, big, in) )
return 1;
if( fwrite(line, sizeof(long), BUFF_WIDTH, out) != (size_t)BUFF_WIDTH) {
fprintf(stderr, "cmdRead: writing failed.\n");
return 1;
}
}
int dummy;
if( fread(&dummy, sizeof(int), 1, in) > 0) {
fprintf(stderr, "cmdRead: too much data.\n");
return 0;
}
} else if(stretch) {
// size differs, but stretching is allowed
long buff[header.size_x * header.size_y];
if( readLine(buff, header.size_x * header.size_y, big, in) )
return 1;
double xs = (double)header.size_x / BUFF_WIDTH;
double ys = (double)header.size_y / BUFF_HEIGHT;
for(int j=0; j<BUFF_HEIGHT; j++) {
int y = int( (double)j*ys );
if (y >= header.size_y)
y = header.size_y - 1;
long line[BUFF_WIDTH];
for( int i=0;i<BUFF_WIDTH;i++) {
int x = int( (double)i*xs );
if (x >= header.size_x)
x = header.size_x - 1;
long tp = buff[x + y*header.size_x];
int ox = tp % header.size_x;
int oy = tp / header.size_x;
int dx = int( (double)(ox - x)/xs );
int dy = int( (double)(oy - y)/ys );
line[i] = abs(i + dx + (j + dy) * BUFF_WIDTH)%BUFF_SIZE;
}
if( fwrite(line, sizeof(long), BUFF_WIDTH, out) != (size_t)BUFF_WIDTH) {
fprintf(stderr, "cmdRead: writing failed.\n");
return 1;
}
}
} else {
fprintf(stderr, "cmdRead: Wrong size. stretching not allowed.\n");
return 1;
}
if(pipe)
pclose(in);
return 0;
}
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