// Save this (preloaded) marker to disk.
int JpegMarker::Save(FILE *pFile) {
const int location = ftell(pFile);
if (pFile == NULL)
throw("Null File in JpegMarker::Save.");
unsigned short markerswapped = byteswap2(marker_);
int rv = fwrite(&markerswapped, sizeof(unsigned short), 1, pFile);
if (rv != 1) return 0;
unsigned short slice_or_length = length_;
if (marker_ == Jpeg::jpeg_sos)
slice_or_length = slice_;
ByteSwapInPlace(&slice_or_length, 1);
rv = fwrite(&slice_or_length, sizeof(unsigned short), 1, pFile);
if (rv != 1) return 0;
if (marker_ == Jpeg::jpeg_sos) {
WriteWithStuffBytes(pFile);
// Add the EOI
unsigned char eoi0 = 0xff;
unsigned char eoi1 = 0xd9;
fwrite(&eoi0, sizeof(eoi0), 1, pFile);
fwrite(&eoi1, sizeof(eoi1), 1, pFile);
} else {
rv = fwrite(&data_[0], sizeof(char), data_.size(), pFile);
if (rv != data_.size()) return 0;
}
if (debug > 0)
printf("Saved marker %04x length %u at %d\n", marker_, length_, location);
return 1;
}
TiffIfd::TiffIfd(FILE *pFile, unsigned int ifdoffset,
bool loadall, unsigned int subfileoffset,
bool byte_swapping) :
data_(NULL), subfileoffset_(subfileoffset), byte_swapping_(byte_swapping) {
if (pFile == NULL)
return;
int iRV= fseek(pFile, ifdoffset, SEEK_SET);
if (iRV != 0) {
printf("Failed seek");
fclose(pFile);
return;
}
short nr;
iRV = fread(&nr, sizeof(short), 1, pFile);
if (iRV != 1) return;
if (byte_swapping) ByteSwapInPlace(&nr, 1);
printf("IFDSize: %d \n", nr);
for(int tagindex=0 ; tagindex < nr; ++tagindex) {
int pos = ftell(pFile);
// printf("File pointer %d\n", pos);
TiffTag *tag = new TiffTag(pFile, byte_swapping_);
tags_.push_back(tag);
}
printf("\n DIDIFD\n");
iRV = fread(&nextifdoffset_, sizeof(unsigned int), 1, pFile);
if (iRV != 1) {
throw("Couldn't read nextifdoffset");
}
if (byte_swapping) ByteSwapInPlace(&nextifdoffset_, 1);
// This disrupts the file pointer.
LoadImageData(pFile, loadall);
printf("Loaded Image data\n");
if (loadall)
LoadAll(pFile);
printf("Listing tags\n");
ListTags();
}
