static void
save_exif(struct jpeg_decompress_struct const cinfo,
const char * const exif_filespec) {
/*----------------------------------------------------------------------------
Write the contents of the first Exif header in the image into the
file with filespec 'exif_filespec'. Start with the two byte length
field. If 'exif_filespec' is "-", write to standard output.
If there is no Exif header in the image, write just zero, as a two
byte pure binary integer.
-----------------------------------------------------------------------------*/
FILE * exif_file;
struct jpeg_marker_struct * markerP;
exif_file = pm_openw(exif_filespec);
for (markerP = cinfo.marker_list;
markerP && !is_exif(*markerP);
markerP = markerP->next);
if (markerP) {
pm_writebigshort(exif_file, markerP->data_length+2);
if (ferror(exif_file))
pm_error("Write of Exif header to %s failed on first byte.",
exif_filespec);
else {
int rc;
rc = fwrite(markerP->data, 1, markerP->data_length, exif_file);
if (rc != markerP->data_length)
pm_error("Write of Exif header to '%s' failed. Wrote "
"length successfully, but then failed after "
"%d characters of data.", exif_filespec, rc);
}
} else {
/* There is no Exif header in the image */
pm_writebigshort(exif_file, 0);
if (ferror(exif_file))
pm_error("Write of Exif header file '%s' failed.", exif_filespec);
}
pm_close(exif_file);
}
static void
dump_exif(struct jpeg_decompress_struct const cinfo) {
/*----------------------------------------------------------------------------
Dump as informational messages the contents of all EXIF headers in
the image, interpreted. An EXIF header is an APP1 marker.
-----------------------------------------------------------------------------*/
struct jpeg_marker_struct * markerP;
boolean found_one;
found_one = FALSE; /* initial value */
for (markerP = cinfo.marker_list;
markerP; markerP = markerP->next)
if (is_exif(*markerP)) {
pm_message("EXIF INFO:");
print_exif_info(*markerP);
found_one = TRUE;
}
if (!found_one)
pm_message("No EXIF info in image.");
}
bool CxImageJPG::CxExifInfo::DecodeInfo(struct jpeg_decompress_struct cinfo)
{
struct jpeg_marker_struct * markerP;
bool found_one=false;
for (markerP = cinfo.marker_list; markerP; markerP = markerP->next) {
if (is_exif(*markerP)) {
if (!exif_process(markerP->data, markerP->data_length, m_exifinfo)) return false;
found_one = true;
}
}
if (!found_one){
strcpy(m_szLastError,"No EXIF info in image.");
return false;
}
return true;
}
