libnjb: setpbm.c

libnjb 2.2.6

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setpbm.c
#include "common.h"
/* For isspace() */
#include <ctype.h>
static void usage (void)
{
fprintf(stderr, "usage: setpbm [ -D debuglvl ] <path>\n");
exit(1);
}
static void skip_whitespaces (FILE *f) {
int c;
while (!feof (f)) {
c = fgetc (f);
if (!isspace (c)) {
if (c == '#') { // Skip comment
while (!feof (f) && (c = fgetc (f)) != '\n')
;
}
else {
ungetc (c, f);
break;
}
}
}
}
static int verify_pbm (FILE *f, int x, int y) {
u_int16_t magic;
unsigned int width, height;
int c;
if (fread (&magic, 1, 2, f) < 2) {
return -1;
}
if (magic != 0x3450) {
return -1;
}
skip_whitespaces(f);
width = 0;
fscanf (f, "%u", &width);
if (width != x) {
return -1;
}
skip_whitespaces (f);
fscanf (f, "%u", &height);
if (height != y) {
return -1;
}
c = fgetc (f);
if (!isspace (c)) {
return -1;
}
return 0;
}
int main(int argc, char **argv)
{
njb_t njbs[NJB_MAX_DEVICES], *njb;
int n, opt, debug;
extern int optind;
extern char *optarg;
char *path;
int x, y, bytes;
debug = 0;
while ( (opt = getopt(argc, argv, "D:")) != -1 ) {
switch (opt) {
case 'D':
debug= atoi(optarg);
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if ( argc != 1 ) usage();
if ( debug ) NJB_Set_Debug(debug);
path= argv[0];
printf("Uploading image:\n");
printf("Filename: %s\n", path);
if (NJB_Discover(njbs, 0, &n) == -1) {
fprintf(stderr, "could not locate any jukeboxes\n");
return 1;
}
if ( n == 0 ) {
fprintf(stderr, "no NJB devices found\n");
return 0;
}
njb = njbs;
if ( NJB_Open(njb) == -1 ) {
NJB_Error_Dump(njb,stderr);
return 1;
}
NJB_Capture(njb);
/* Get the bitmap dimensions */
if ( NJB_Get_Bitmap_Dimensions(njb, &x, &y, &bytes) == -1 ) {
printf("This device does not support setting the bitmap.");
NJB_Error_Dump(njb, stderr);
} else {
FILE *f;
unsigned char data[1088];
if ( (f = fopen(path, "rb")) == NULL) {
printf("Could not open bitmap file.\n");
exit(-1);
}
if (verify_pbm(f, x, y) == -1) {
printf("Bad bitmap dimensions or bad file.\n");
fclose (f);
exit(-1);
}
if ( fread (data, 1, 1088, f) < 1088 ) {
printf("Could not read in bitmap file.\n");
fclose (f);
exit(-1);
}
fclose (f);
if ( NJB_Set_Bitmap(njb, data) == -1 ) {
NJB_Error_Dump(njb, stderr);
}
}
NJB_Release(njb);
NJB_Close (njb);
return 0;
}