static BOOL
FreeImage_SetMetadataEx(FREE_IMAGE_MDMODEL model, FIBITMAP *dib, const char *key, WORD id, FREE_IMAGE_MDTYPE type, DWORD count, DWORD length, const void *value)
{
BOOL bResult = FALSE;
FITAG *tag = FreeImage_CreateTag();
if(tag) {
FreeImage_SetTagKey(tag, key);
FreeImage_SetTagID(tag, id);
FreeImage_SetTagType(tag, type);
FreeImage_SetTagCount(tag, count);
FreeImage_SetTagLength(tag, length);
FreeImage_SetTagValue(tag, value);
if(model == FIMD_ANIMATION) {
TagLib& s = TagLib::instance();
// get the tag description
const char *description = s.getTagDescription(TagLib::ANIMATION, id);
FreeImage_SetTagDescription(tag, description);
}
// store the tag
bResult = FreeImage_SetMetadata(model, dib, key, tag);
FreeImage_DeleteTag(tag);
}
return bResult;
}
/**
Read and decode IPTC binary data
*/
BOOL
read_iptc_profile(FIBITMAP *dib, const BYTE *dataptr, unsigned int datalen) {
char defaultKey[16];
size_t length = datalen;
BYTE *profile = (BYTE*)dataptr;
std::string Keywords;
std::string SupplementalCategory;
WORD tag_id;
// create a tag
FITAG *tag = FreeImage_CreateTag();
TagLib& tag_lib = TagLib::instance();
// find start of the BIM portion of the binary data
size_t offset = 0;
while(offset < length - 1) {
if((profile[offset] == 0x1C) && (profile[offset+1] == 0x02))
break;
offset++;
}
// for each tag
while (offset < length) {
// identifies start of a tag
if (profile[offset] != 0x1c) {
break;
}
// we need at least five bytes left to read a tag
if ((offset + 5) >= length) {
break;
}
offset++;
int directoryType = profile[offset++];
int tagType = profile[offset++];;
int tagByteCount = ((profile[offset] & 0xFF) << 8) | (profile[offset + 1] & 0xFF);
offset += 2;
if ((offset + tagByteCount) > length) {
// data for tag extends beyond end of iptc segment
break;
}
// process the tag
tag_id = (WORD)(tagType | (directoryType << 8));
FreeImage_SetTagID(tag, tag_id);
FreeImage_SetTagLength(tag, tagByteCount);
// allocate a buffer to store the tag value
BYTE *iptc_value = (BYTE*)malloc((tagByteCount + 1) * sizeof(BYTE));
memset(iptc_value, 0, (tagByteCount + 1) * sizeof(BYTE));
// get the tag value
switch (tag_id) {
case TAG_RECORD_VERSION:
{
// short
FreeImage_SetTagType(tag, FIDT_SSHORT);
FreeImage_SetTagCount(tag, 1);
short *pvalue = (short*)&iptc_value[0];
*pvalue = (short)((profile[offset] << 8) | profile[offset + 1]);
FreeImage_SetTagValue(tag, pvalue);
break;
}
case TAG_RELEASE_DATE:
case TAG_DATE_CREATED:
// Date object
case TAG_RELEASE_TIME:
case TAG_TIME_CREATED:
// time
default:
{
// string
FreeImage_SetTagType(tag, FIDT_ASCII);
FreeImage_SetTagCount(tag, tagByteCount);
for(int i = 0; i < tagByteCount; i++) {
iptc_value[i] = profile[offset + i];
}
iptc_value[tagByteCount] = '\0';
FreeImage_SetTagValue(tag, (char*)&iptc_value[0]);
break;
}
}
if(tag_id == TAG_SUPPLEMENTAL_CATEGORIES) {
// concatenate the categories
if(SupplementalCategory.length() == 0) {
SupplementalCategory.append((char*)iptc_value);
} else {
SupplementalCategory.append(IPTC_DELIMITER);
SupplementalCategory.append((char*)iptc_value);
}
}
else if(tag_id == TAG_KEYWORDS) {
// concatenate the keywords
if(Keywords.length() == 0) {
Keywords.append((char*)iptc_value);
} else {
Keywords.append(IPTC_DELIMITER);
Keywords.append((char*)iptc_value);
}
}
else {
// get the tag key and description
const char *key = tag_lib.getTagFieldName(TagLib::IPTC, tag_id, defaultKey);
FreeImage_SetTagKey(tag, key);
const char *description = tag_lib.getTagDescription(TagLib::IPTC, tag_id);
FreeImage_SetTagDescription(tag, description);
// store the tag
if(key) {
FreeImage_SetMetadata(FIMD_IPTC, dib, key, tag);
}
}
free(iptc_value);
// next tag
offset += tagByteCount;
}
// store the 'keywords' tag
if(Keywords.length()) {
FreeImage_SetTagType(tag, FIDT_ASCII);
FreeImage_SetTagID(tag, TAG_KEYWORDS);
FreeImage_SetTagKey(tag, tag_lib.getTagFieldName(TagLib::IPTC, TAG_KEYWORDS, defaultKey));
FreeImage_SetTagDescription(tag, tag_lib.getTagDescription(TagLib::IPTC, TAG_KEYWORDS));
FreeImage_SetTagLength(tag, (DWORD)Keywords.length());
FreeImage_SetTagCount(tag, (DWORD)Keywords.length());
FreeImage_SetTagValue(tag, (char*)Keywords.c_str());
FreeImage_SetMetadata(FIMD_IPTC, dib, FreeImage_GetTagKey(tag), tag);
}
// store the 'supplemental category' tag
if(SupplementalCategory.length()) {
FreeImage_SetTagType(tag, FIDT_ASCII);
FreeImage_SetTagID(tag, TAG_SUPPLEMENTAL_CATEGORIES);
FreeImage_SetTagKey(tag, tag_lib.getTagFieldName(TagLib::IPTC, TAG_SUPPLEMENTAL_CATEGORIES, defaultKey));
FreeImage_SetTagDescription(tag, tag_lib.getTagDescription(TagLib::IPTC, TAG_SUPPLEMENTAL_CATEGORIES));
FreeImage_SetTagLength(tag, (DWORD)SupplementalCategory.length());
FreeImage_SetTagCount(tag, (DWORD)SupplementalCategory.length());
FreeImage_SetTagValue(tag, (char*)SupplementalCategory.c_str());
FreeImage_SetMetadata(FIMD_IPTC, dib, FreeImage_GetTagKey(tag), tag);
}
// delete the tag
FreeImage_DeleteTag(tag);
return TRUE;
}
/**
Read a single exif tag
*/
static BOOL
tiff_read_exif_tag(TIFF *tif, TagLib::MDMODEL md_model, FIBITMAP *dib, TagLib& tagLib, TIFFDirectory *td, uint32 tag) {
const TIFFField *fip;
uint32 value_count;
int mem_alloc = 0;
void *raw_data = NULL;
if(tag == TIFFTAG_EXIFIFD) {
return TRUE;
}
// get the tag key - use NULL to avoid reading GeoTIFF tags
const char *key = tagLib.getTagFieldName(md_model, (WORD)tag, NULL);
if(key == NULL) {
return TRUE;
}
fip = TIFFFieldWithTag(tif, tag);
if(fip == NULL) {
return TRUE;
}
if(fip->field_passcount) { //<- "passcount" means "returns count"
if (fip->field_readcount != TIFF_VARIABLE2) { //<- TIFF_VARIABLE2 means "uses LONG count"
// assume TIFF_VARIABLE (uses SHORT count)
uint16 value_count16;
if(TIFFGetField(tif, tag, &value_count16, &raw_data) != 1) {
return TRUE;
}
value_count = value_count16;
} else {
if(TIFFGetField(tif, tag, &value_count, &raw_data) != 1) {
return TRUE;
}
}
} else {
// determine count
if (fip->field_readcount == TIFF_VARIABLE || fip->field_readcount == TIFF_VARIABLE2) {
value_count = 1;
} else if (fip->field_readcount == TIFF_SPP) {
value_count = td->td_samplesperpixel;
} else {
value_count = fip->field_readcount;
}
// access fields as pointers to data
// (### determining this is NOT robust... and hardly can be. It is implemented looking the _TIFFVGetField code)
if(fip->field_tag == TIFFTAG_TRANSFERFUNCTION) {
// reading this tag cause a bug probably located somewhere inside libtiff
return TRUE;
}
if ((fip->field_type == TIFF_ASCII
|| fip->field_readcount == TIFF_VARIABLE
|| fip->field_readcount == TIFF_VARIABLE2
|| fip->field_readcount == TIFF_SPP
|| value_count > 1)
&& fip->field_tag != TIFFTAG_PAGENUMBER
&& fip->field_tag != TIFFTAG_HALFTONEHINTS
&& fip->field_tag != TIFFTAG_YCBCRSUBSAMPLING
&& fip->field_tag != TIFFTAG_DOTRANGE
&& fip->field_tag != TIFFTAG_BITSPERSAMPLE //<- these two are tricky -
&& fip->field_tag != TIFFTAG_COMPRESSION //<- they are defined as TIFF_VARIABLE but in reality return a single value
) {
if(TIFFGetField(tif, tag, &raw_data) != 1) {
return TRUE;
}
} else {
// access fields as values
const int value_size = _TIFFDataSize(fip->field_type);
raw_data = _TIFFmalloc(value_size * value_count);
mem_alloc = 1;
int ok = FALSE;
// ### if value_count > 1, tag is PAGENUMBER or HALFTONEHINTS or YCBCRSUBSAMPLING or DOTRANGE,
// all off which are value_count == 2 (see tif_dirinfo.c)
switch(value_count)
{
case 1:
ok = TIFFGetField(tif, tag, raw_data);
break;
case 2:
ok = TIFFGetField(tif, tag, raw_data, (BYTE*)(raw_data) + value_size*1);
break;
/* # we might need more in the future:
case 3:
ok = TIFFGetField(tif, tag, raw_data, (BYTE*)(raw_data) + value_size*1, (BYTE*)(raw_data) + value_size*2);
break;
*/
default:
FreeImage_OutputMessageProc(FIF_TIFF, "Unimplemented variable number of parameters for Tiff Tag %s", fip->field_name);
break;
}
if(ok != 1) {
_TIFFfree(raw_data);
return TRUE;
}
}
}
// build FreeImage tag from Tiff Tag data we collected
FITAG *fitag = FreeImage_CreateTag();
if(!fitag) {
if(mem_alloc) {
_TIFFfree(raw_data);
}
return FALSE;
}
FreeImage_SetTagID(fitag, (WORD)tag);
FreeImage_SetTagKey(fitag, key);
switch(fip->field_type) {
case TIFF_BYTE:
FreeImage_SetTagType(fitag, FIDT_BYTE);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_UNDEFINED:
FreeImage_SetTagType(fitag, FIDT_UNDEFINED);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_SBYTE:
FreeImage_SetTagType(fitag, FIDT_SBYTE);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_SHORT:
FreeImage_SetTagType(fitag, FIDT_SHORT);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_SSHORT:
FreeImage_SetTagType(fitag, FIDT_SSHORT);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_LONG:
FreeImage_SetTagType(fitag, FIDT_LONG);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_IFD:
FreeImage_SetTagType(fitag, FIDT_IFD);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_SLONG:
FreeImage_SetTagType(fitag, FIDT_SLONG);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_RATIONAL: {
// LibTIFF converts rational to floats : reconvert floats to rationals
DWORD *rvalue = (DWORD*)malloc(2 * value_count * sizeof(DWORD));
for(uint32 i = 0; i < value_count; i++) {
float *fv = (float*)raw_data;
FIRational rational(fv[i]);
rvalue[2*i] = rational.getNumerator();
rvalue[2*i+1] = rational.getDenominator();
}
FreeImage_SetTagType(fitag, FIDT_RATIONAL);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, rvalue);
free(rvalue);
}
break;
case TIFF_SRATIONAL: {
// LibTIFF converts rational to floats : reconvert floats to rationals
LONG *rvalue = (LONG*)malloc(2 * value_count * sizeof(LONG));
for(uint32 i = 0; i < value_count; i++) {
float *fv = (float*)raw_data;
FIRational rational(fv[i]);
rvalue[2*i] = rational.getNumerator();
rvalue[2*i+1] = rational.getDenominator();
}
FreeImage_SetTagType(fitag, FIDT_RATIONAL);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, rvalue);
free(rvalue);
}
break;
case TIFF_FLOAT:
FreeImage_SetTagType(fitag, FIDT_FLOAT);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_DOUBLE:
FreeImage_SetTagType(fitag, FIDT_DOUBLE);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_LONG8: // BigTIFF 64-bit unsigned integer
FreeImage_SetTagType(fitag, FIDT_LONG8);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_IFD8: // BigTIFF 64-bit unsigned integer (offset)
FreeImage_SetTagType(fitag, FIDT_IFD8);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_SLONG8: // BigTIFF 64-bit signed integer
FreeImage_SetTagType(fitag, FIDT_SLONG8);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
default: {
size_t length = strlen((char*)raw_data) + 1;
FreeImage_SetTagType(fitag, FIDT_ASCII);
FreeImage_SetTagLength(fitag, (DWORD)length);
FreeImage_SetTagCount(fitag, (DWORD)length);
FreeImage_SetTagValue(fitag, raw_data);
}
break;
}
const char *description = tagLib.getTagDescription(md_model, (WORD)tag);
if(description) {
FreeImage_SetTagDescription(fitag, description);
}
// store the tag
FreeImage_SetMetadata(tagLib.getFreeImageModel(md_model), dib, FreeImage_GetTagKey(fitag), fitag);
// destroy the tag
FreeImage_DeleteTag(fitag);
if(mem_alloc) {
_TIFFfree(raw_data);
}
return TRUE;
}
/**
Process a standard Exif tag
*/
static void
processExifTag(FIBITMAP *dib, FITAG *tag, char *pval, BOOL msb_order, TagLib::MDMODEL md_model) {
char defaultKey[16];
int n;
DWORD i;
// allocate a buffer to store the tag value
BYTE *exif_value = (BYTE*)malloc(FreeImage_GetTagLength(tag) * sizeof(BYTE));
memset(exif_value, 0, FreeImage_GetTagLength(tag) * sizeof(BYTE));
// get the tag value
switch(FreeImage_GetTagType(tag)) {
case FIDT_SHORT:
{
WORD *value = (WORD*)&exif_value[0];
for(i = 0; i < FreeImage_GetTagCount(tag); i++) {
value[i] = ReadUint16(msb_order, pval + i * sizeof(WORD));
}
FreeImage_SetTagValue(tag, value);
break;
}
case FIDT_SSHORT:
{
short *value = (short*)&exif_value[0];
for(i = 0; i < FreeImage_GetTagCount(tag); i++) {
value[i] = ReadInt16(msb_order, pval + i * sizeof(short));
}
FreeImage_SetTagValue(tag, value);
break;
}
case FIDT_LONG:
{
DWORD *value = (DWORD*)&exif_value[0];
for(i = 0; i < FreeImage_GetTagCount(tag); i++) {
value[i] = ReadUint32(msb_order, pval + i * sizeof(DWORD));
}
FreeImage_SetTagValue(tag, value);
break;
}
case FIDT_SLONG:
{
LONG *value = (LONG*)&exif_value[0];
for(i = 0; i < FreeImage_GetTagCount(tag); i++) {
value[i] = ReadInt32(msb_order, pval + i * sizeof(LONG));
}
FreeImage_SetTagValue(tag, value);
break;
}
case FIDT_RATIONAL:
{
n = sizeof(DWORD);
DWORD *value = (DWORD*)&exif_value[0];
for(i = 0; i < 2 * FreeImage_GetTagCount(tag); i++) {
// read a sequence of (numerator, denominator)
value[i] = ReadUint32(msb_order, n*i + (char*)pval);
}
FreeImage_SetTagValue(tag, value);
break;
}
case FIDT_SRATIONAL:
{
n = sizeof(LONG);
LONG *value = (LONG*)&exif_value[0];
for(i = 0; i < 2 * FreeImage_GetTagCount(tag); i++) {
// read a sequence of (numerator, denominator)
value[i] = ReadInt32(msb_order, n*i + (char*)pval);
}
FreeImage_SetTagValue(tag, value);
break;
}
case FIDT_BYTE:
case FIDT_ASCII:
case FIDT_SBYTE:
case FIDT_UNDEFINED:
case FIDT_FLOAT:
case FIDT_DOUBLE:
default:
FreeImage_SetTagValue(tag, pval);
break;
}
if(md_model == TagLib::EXIF_MAKERNOTE_CANON) {
// A single Canon tag can have multiple values within
processCanonMakerNoteTag(dib, tag);
}
else {
TagLib& s = TagLib::instance();
WORD tag_id = FreeImage_GetTagID(tag);
// get the tag key and description
const char *key = s.getTagFieldName(md_model, tag_id, defaultKey);
FreeImage_SetTagKey(tag, key);
const char *description = s.getTagDescription(md_model, tag_id);
FreeImage_SetTagDescription(tag, description);
// store the tag
if(key) {
FreeImage_SetMetadata(s.getFreeImageModel(md_model), dib, key, tag);
}
}
// free the temporary buffer
free(exif_value);
}
void
tiff_read_geotiff_profile(TIFF *tif, FIBITMAP *dib) {
char defaultKey[16];
size_t tag_size = sizeof(xtiffFieldInfo) / sizeof(xtiffFieldInfo[0]);
TagLib& tag_lib = TagLib::instance();
for(unsigned i = 0; i < tag_size; i++) {
const TIFFFieldInfo *fieldInfo = &xtiffFieldInfo[i];
if(fieldInfo->field_type == TIFF_ASCII) {
char *params = NULL;
if(TIFFGetField(tif, fieldInfo->field_tag, ¶ms)) {
// create a tag
FITAG *tag = FreeImage_CreateTag();
if(!tag)
return;
WORD tag_id = (WORD)fieldInfo->field_tag;
FreeImage_SetTagType(tag, (FREE_IMAGE_MDTYPE)fieldInfo->field_type);
FreeImage_SetTagID(tag, tag_id);
FreeImage_SetTagKey(tag, tag_lib.getTagFieldName(TagLib::GEOTIFF, tag_id, defaultKey));
FreeImage_SetTagDescription(tag, tag_lib.getTagDescription(TagLib::GEOTIFF, tag_id));
FreeImage_SetTagLength(tag, (DWORD)strlen(params) + 1);
FreeImage_SetTagCount(tag, FreeImage_GetTagLength(tag));
FreeImage_SetTagValue(tag, params);
FreeImage_SetMetadata(FIMD_GEOTIFF, dib, FreeImage_GetTagKey(tag), tag);
// delete the tag
FreeImage_DeleteTag(tag);
}
} else {
short tag_count = 0;
void* data = NULL;
if(TIFFGetField(tif, fieldInfo->field_tag, &tag_count, &data)) {
// create a tag
FITAG *tag = FreeImage_CreateTag();
if(!tag)
return;
WORD tag_id = (WORD)fieldInfo->field_tag;
FREE_IMAGE_MDTYPE tag_type = (FREE_IMAGE_MDTYPE)fieldInfo->field_type;
FreeImage_SetTagType(tag, tag_type);
FreeImage_SetTagID(tag, tag_id);
FreeImage_SetTagKey(tag, tag_lib.getTagFieldName(TagLib::GEOTIFF, tag_id, defaultKey));
FreeImage_SetTagDescription(tag, tag_lib.getTagDescription(TagLib::GEOTIFF, tag_id));
FreeImage_SetTagLength(tag, FreeImage_TagDataWidth(tag_type) * tag_count);
FreeImage_SetTagCount(tag, tag_count);
FreeImage_SetTagValue(tag, data);
FreeImage_SetMetadata(FIMD_GEOTIFF, dib, FreeImage_GetTagKey(tag), tag);
// delete the tag
FreeImage_DeleteTag(tag);
}
}
} // for(tag_size)
}
/**
Process a Canon maker note tag.
A single Canon tag may contain many other tags within.
*/
static BOOL
processCanonMakerNoteTag(FIBITMAP *dib, FITAG *tag) {
char defaultKey[16];
DWORD startIndex = 0;
TagLib& s = TagLib::instance();
WORD tag_id = FreeImage_GetTagID(tag);
int subTagTypeBase = 0;
switch(tag_id) {
case TAG_CANON_CAMERA_STATE_0x01:
subTagTypeBase = 0xC100;
startIndex = 1;
break;
case TAG_CANON_CAMERA_STATE_0x02:
subTagTypeBase = 0xC200;
startIndex = 0;
break;
case TAG_CANON_CAMERA_STATE_0x04:
subTagTypeBase = 0xC400;
startIndex = 1;
break;
case TAG_CANON_CAMERA_STATE_0x12:
subTagTypeBase = 0xC120;
startIndex = 0;
break;
case TAG_CANON_CAMERA_STATE_0xA0:
subTagTypeBase = 0xCA00;
startIndex = 1;
break;
case TAG_CANON_CAMERA_STATE_0xE0:
subTagTypeBase = 0xCE00;
startIndex = 1;
break;
default:
{
// process as a normal tag
// get the tag key and description
const char *key = s.getTagFieldName(TagLib::EXIF_MAKERNOTE_CANON, tag_id, defaultKey);
FreeImage_SetTagKey(tag, key);
const char *description = s.getTagDescription(TagLib::EXIF_MAKERNOTE_CANON, tag_id);
FreeImage_SetTagDescription(tag, description);
// store the tag
if(key) {
FreeImage_SetMetadata(FIMD_EXIF_MAKERNOTE, dib, key, tag);
}
return TRUE;
}
break;
}
WORD *pvalue = (WORD*)FreeImage_GetTagValue(tag);
// create a tag
FITAG *canonTag = FreeImage_CreateTag();
if(!canonTag) return FALSE;
// we intentionally skip the first array member (if needed)
for (DWORD i = startIndex; i < FreeImage_GetTagCount(tag); i++) {
tag_id = (WORD)(subTagTypeBase + i);
FreeImage_SetTagID(canonTag, tag_id);
FreeImage_SetTagType(canonTag, FIDT_SHORT);
FreeImage_SetTagCount(canonTag, 1);
FreeImage_SetTagLength(canonTag, 2);
FreeImage_SetTagValue(canonTag, &pvalue[i]);
// get the tag key and description
const char *key = s.getTagFieldName(TagLib::EXIF_MAKERNOTE_CANON, tag_id, defaultKey);
FreeImage_SetTagKey(canonTag, key);
const char *description = s.getTagDescription(TagLib::EXIF_MAKERNOTE_CANON, tag_id);
FreeImage_SetTagDescription(canonTag, description);
// store the tag
if(key) {
FreeImage_SetMetadata(FIMD_EXIF_MAKERNOTE, dib, key, canonTag);
}
}
// delete the tag
FreeImage_DeleteTag(canonTag);
return TRUE;
}
BOOL tiff_read_exif_tags(TIFF *tif, TagLib::MDMODEL md_model, FIBITMAP *dib) {
int i;
short count;
TagLib& tagLib = TagLib::instance();
TIFFDirectory *td = &tif->tif_dir;
count = (short) TIFFGetTagListCount(tif);
for(i = 0; i < count; i++) {
ttag_t tag = TIFFGetTagListEntry(tif, i);
const TIFFFieldInfo *fip;
uint32 value_count;
int mem_alloc = 0;
void *raw_data;
if(tag == TIFFTAG_EXIFIFD) continue;
// get the tag key - use NULL to avoid reading GeoTIFF tags
const char *key = tagLib.getTagFieldName(md_model, (WORD)tag, NULL);
if(key == NULL) continue;
fip = TIFFFieldWithTag(tif, tag);
if(fip == NULL) continue;
if(fip->field_passcount) {
if (fip->field_readcount != TIFF_VARIABLE2) {
// assume TIFF_VARIABLE
uint16 value_count16;
if(TIFFGetField(tif, tag, &value_count16, &raw_data) != 1) continue;
value_count = value_count16;
} else {
if(TIFFGetField(tif, tag, &value_count, &raw_data) != 1) continue;
}
} else {
if (fip->field_readcount == TIFF_VARIABLE || fip->field_readcount == TIFF_VARIABLE2) {
value_count = 1;
} else if (fip->field_readcount == TIFF_SPP) {
value_count = td->td_samplesperpixel;
} else {
value_count = fip->field_readcount;
}
if (fip->field_type == TIFF_ASCII
|| fip->field_readcount == TIFF_VARIABLE
|| fip->field_readcount == TIFF_VARIABLE2
|| fip->field_readcount == TIFF_SPP
|| value_count > 1) {
if(TIFFGetField(tif, tag, &raw_data) != 1) continue;
} else {
raw_data = _TIFFmalloc(_TIFFDataSize(fip->field_type) * value_count);
mem_alloc = 1;
if(TIFFGetField(tif, tag, raw_data) != 1) {
_TIFFfree(raw_data);
continue;
}
}
}
// create a tag
FITAG *fitag = FreeImage_CreateTag();
if(!fitag) {
if(mem_alloc)
_TIFFfree(raw_data);
return FALSE;
}
FreeImage_SetTagID(fitag, (WORD)tag);
FreeImage_SetTagKey(fitag, key);
switch(fip->field_type) {
case TIFF_BYTE:
FreeImage_SetTagType(fitag, FIDT_BYTE);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_UNDEFINED:
FreeImage_SetTagType(fitag, FIDT_UNDEFINED);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_SBYTE:
FreeImage_SetTagType(fitag, FIDT_SBYTE);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_SHORT:
FreeImage_SetTagType(fitag, FIDT_SHORT);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_SSHORT:
FreeImage_SetTagType(fitag, FIDT_SSHORT);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_LONG:
FreeImage_SetTagType(fitag, FIDT_LONG);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_IFD:
FreeImage_SetTagType(fitag, FIDT_IFD);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_SLONG:
FreeImage_SetTagType(fitag, FIDT_SLONG);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_RATIONAL:
{
// LibTIFF converts rational to floats : reconvert floats to rationals
DWORD *rvalue = (DWORD*)malloc(2 * value_count * sizeof(DWORD));
for(uint32 i = 0; i < value_count; i++) {
float *fv = (float*)raw_data;
FIRational rational(fv[i]);
rvalue[2*i] = rational.getNumerator();
rvalue[2*i+1] = rational.getDenominator();
}
FreeImage_SetTagType(fitag, FIDT_RATIONAL);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, rvalue);
free(rvalue);
}
break;
case TIFF_SRATIONAL:
{
// LibTIFF converts rational to floats : reconvert floats to rationals
LONG *rvalue = (LONG*)malloc(2 * value_count * sizeof(LONG));
for(uint32 i = 0; i < value_count; i++) {
float *fv = (float*)raw_data;
FIRational rational(fv[i]);
rvalue[2*i] = rational.getNumerator();
rvalue[2*i+1] = rational.getDenominator();
}
FreeImage_SetTagType(fitag, FIDT_RATIONAL);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, rvalue);
free(rvalue);
}
break;
case TIFF_FLOAT:
FreeImage_SetTagType(fitag, FIDT_FLOAT);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_DOUBLE:
FreeImage_SetTagType(fitag, FIDT_DOUBLE);
FreeImage_SetTagLength(fitag, TIFFDataWidth(fip->field_type) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
default:
{
size_t length = strlen((char*)raw_data) + 1;
FreeImage_SetTagType(fitag, FIDT_ASCII);
FreeImage_SetTagLength(fitag, (DWORD)length);
FreeImage_SetTagCount(fitag, (DWORD)length);
FreeImage_SetTagValue(fitag, raw_data);
}
break;
}
const char *description = tagLib.getTagDescription(md_model, (WORD)tag);
if(description) {
FreeImage_SetTagDescription(fitag, description);
}
// store the tag
FreeImage_SetMetadata(tagLib.getFreeImageModel(md_model), dib, FreeImage_GetTagKey(fitag), fitag);
// destroy the tag
FreeImage_DeleteTag(fitag);
if(mem_alloc)
_TIFFfree(raw_data);
}
return TRUE;
}
/**
Process a Canon maker note tag.
A single Canon tag may contain many other tags within.
*/
static void
processCanonMakerNoteTag(FIBITMAP *dib, FITAG *tag) {
char defaultKey[16];
DWORD startIndex = 0;
TagLib& s = TagLib::instance();
WORD tag_id = FreeImage_GetTagID(tag);
if((tag_id == TAG_CANON_CAMERA_STATE_1) || (tag_id == TAG_CANON_CAMERA_STATE_2) || (tag_id == TAG_CANON_CAMERA_STATE_4)) {
// this single tag has multiple values within
int subTagTypeBase = 0;
switch(tag_id) {
case TAG_CANON_CAMERA_STATE_1:
subTagTypeBase = 0xC100;
startIndex = 1;
break;
case TAG_CANON_CAMERA_STATE_2:
subTagTypeBase = 0xC200;
startIndex = 0;
break;
case TAG_CANON_CAMERA_STATE_4:
subTagTypeBase = 0xC400;
startIndex = 2;
break;
}
WORD *pvalue = (WORD*)FreeImage_GetTagValue(tag);
// we intentionally skip the first array member
for (DWORD i = startIndex; i < FreeImage_GetTagCount(tag); i++) {
// create a tag
FITAG *canonTag = FreeImage_CreateTag();
if(!canonTag) return;
tag_id = (WORD)(subTagTypeBase + i);
FreeImage_SetTagID(canonTag, tag_id);
FreeImage_SetTagType(canonTag, FIDT_SHORT);
FreeImage_SetTagCount(canonTag, 1);
FreeImage_SetTagLength(canonTag, 2);
FreeImage_SetTagValue(canonTag, &pvalue[i]);
// get the tag key and description
const char *key = s.getTagFieldName(TagLib::EXIF_MAKERNOTE_CANON, tag_id, defaultKey);
FreeImage_SetTagKey(canonTag, key);
const char *description = s.getTagDescription(TagLib::EXIF_MAKERNOTE_CANON, tag_id);
FreeImage_SetTagDescription(canonTag, description);
// store the tag
if(key) {
FreeImage_SetMetadata(FIMD_EXIF_MAKERNOTE, dib, key, canonTag);
}
// delete the tag
FreeImage_DeleteTag(canonTag);
}
}
else {
// process as a normal tag
// get the tag key and description
const char *key = s.getTagFieldName(TagLib::EXIF_MAKERNOTE_CANON, tag_id, defaultKey);
FreeImage_SetTagKey(tag, key);
const char *description = s.getTagDescription(TagLib::EXIF_MAKERNOTE_CANON, tag_id);
FreeImage_SetTagDescription(tag, description);
// store the tag
if(key) {
FreeImage_SetMetadata(FIMD_EXIF_MAKERNOTE, dib, key, tag);
}
}
}
/**
Read a single Exif tag
@param tif TIFF handle
@param tag_id TIFF Tag ID
@param dib Image being read
@param md_model Metadata model where to store the tag
@return Returns TRUE if successful, returns FALSE otherwise
*/
static BOOL
tiff_read_exif_tag(TIFF *tif, uint32 tag_id, FIBITMAP *dib, TagLib::MDMODEL md_model) {
uint32 value_count = 0;
int mem_alloc = 0;
void *raw_data = NULL;
if(tag_id == TIFFTAG_EXIFIFD) {
// Exif IFD offset - skip this tag
// md_model should be EXIF_MAIN, the Exif IFD is processed later using the EXIF_EXIF metadata model
return TRUE;
}
if((tag_id == TIFFTAG_GPSIFD) && (md_model == TagLib::EXIF_MAIN)) {
// Exif GPS IFD offset - skip this tag
// should be processed in another way ...
return TRUE;
}
TagLib& tagLib = TagLib::instance();
// get the tag key - use NULL to avoid reading GeoTIFF tags
const char *key = tagLib.getTagFieldName(md_model, (WORD)tag_id, NULL);
if(key == NULL) {
return TRUE;
}
const TIFFField *fip = TIFFFieldWithTag(tif, tag_id);
if(fip == NULL) {
return TRUE;
}
if(TIFFFieldPassCount(fip)) {
// a count value is required for 'TIFFGetField'
if (TIFFFieldReadCount(fip) != TIFF_VARIABLE2) {
// a count is required, it will be of type uint16
uint16 value_count16 = 0;
if(TIFFGetField(tif, tag_id, &value_count16, &raw_data) != 1) {
// stop, ignore error
return TRUE;
}
value_count = value_count16;
} else {
// a count is required, it will be of type uint32
uint32 value_count32 = 0;
if(TIFFGetField(tif, tag_id, &value_count32, &raw_data) != 1) {
// stop, ignore error
return TRUE;
}
value_count = value_count32;
}
} else {
// determine count
if (TIFFFieldReadCount(fip) == TIFF_VARIABLE || TIFFFieldReadCount(fip) == TIFF_VARIABLE2) {
value_count = 1;
} else if (TIFFFieldReadCount(fip) == TIFF_SPP) {
uint16 spp;
TIFFGetFieldDefaulted(tif, TIFFTAG_SAMPLESPERPIXEL, &spp);
value_count = spp;
} else {
value_count = TIFFFieldReadCount(fip);
}
// access fields as pointers to data
// (### determining this is NOT robust... and hardly can be. It is implemented looking the _TIFFVGetField code)
if(TIFFFieldTag(fip) == TIFFTAG_TRANSFERFUNCTION) {
// reading this tag cause a bug probably located somewhere inside libtiff
return TRUE;
}
if ((TIFFFieldDataType(fip) == TIFF_ASCII
|| TIFFFieldReadCount(fip) == TIFF_VARIABLE
|| TIFFFieldReadCount(fip) == TIFF_VARIABLE2
|| TIFFFieldReadCount(fip) == TIFF_SPP
|| value_count > 1)
&& TIFFFieldTag(fip) != TIFFTAG_PAGENUMBER
&& TIFFFieldTag(fip) != TIFFTAG_HALFTONEHINTS
&& TIFFFieldTag(fip) != TIFFTAG_YCBCRSUBSAMPLING
&& TIFFFieldTag(fip) != TIFFTAG_DOTRANGE
&& TIFFFieldTag(fip) != TIFFTAG_BITSPERSAMPLE //<- these two are tricky -
&& TIFFFieldTag(fip) != TIFFTAG_COMPRESSION //<- they are defined as TIFF_VARIABLE but in reality return a single value
) {
if(TIFFGetField(tif, tag_id, &raw_data) != 1) {
// stop, ignore error
return TRUE;
}
} else {
int value_size = 0;
// access fields as values
// Note:
// For TIFF_RATIONAL values, TIFFDataWidth() returns 8, but LibTIFF use internaly 4-byte float to represent rationals.
{
TIFFDataType tag_type = TIFFFieldDataType(fip);
switch(tag_type) {
case TIFF_RATIONAL:
case TIFF_SRATIONAL:
value_size = 4;
break;
default:
value_size = TIFFDataWidth(tag_type);
break;
}
}
raw_data = _TIFFmalloc(value_size * value_count);
mem_alloc = 1;
int ok = FALSE;
// ### if value_count > 1, tag is PAGENUMBER or HALFTONEHINTS or YCBCRSUBSAMPLING or DOTRANGE,
// all off which are value_count == 2 (see tif_dirinfo.c)
switch(value_count)
{
case 1:
ok = TIFFGetField(tif, tag_id, raw_data);
break;
case 2:
ok = TIFFGetField(tif, tag_id, raw_data, (BYTE*)(raw_data) + value_size*1);
break;
/* # we might need more in the future:
case 3:
ok = TIFFGetField(tif, tag_id, raw_data, (BYTE*)(raw_data) + value_size*1, (BYTE*)(raw_data) + value_size*2);
break;
*/
default:
FreeImage_OutputMessageProc(FIF_TIFF, "Unimplemented variable number of parameters for Tiff Tag %s", TIFFFieldName(fip));
break;
}
if(ok != 1) {
_TIFFfree(raw_data);
return TRUE;
}
}
}
// build FreeImage tag from Tiff Tag data we collected
FITAG *fitag = FreeImage_CreateTag();
if(!fitag) {
if(mem_alloc) {
_TIFFfree(raw_data);
}
return FALSE;
}
FreeImage_SetTagID(fitag, (WORD)tag_id);
FreeImage_SetTagKey(fitag, key);
switch(TIFFFieldDataType(fip)) {
case TIFF_BYTE:
FreeImage_SetTagType(fitag, FIDT_BYTE);
FreeImage_SetTagLength(fitag, TIFFDataWidth( TIFFFieldDataType(fip) ) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_UNDEFINED:
FreeImage_SetTagType(fitag, FIDT_UNDEFINED);
FreeImage_SetTagLength(fitag, TIFFDataWidth( TIFFFieldDataType(fip) ) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_SBYTE:
FreeImage_SetTagType(fitag, FIDT_SBYTE);
FreeImage_SetTagLength(fitag, TIFFDataWidth( TIFFFieldDataType(fip) ) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_SHORT:
FreeImage_SetTagType(fitag, FIDT_SHORT);
FreeImage_SetTagLength(fitag, TIFFDataWidth( TIFFFieldDataType(fip) ) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_SSHORT:
FreeImage_SetTagType(fitag, FIDT_SSHORT);
FreeImage_SetTagLength(fitag, TIFFDataWidth( TIFFFieldDataType(fip) ) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_LONG:
FreeImage_SetTagType(fitag, FIDT_LONG);
FreeImage_SetTagLength(fitag, TIFFDataWidth( TIFFFieldDataType(fip) ) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_IFD:
FreeImage_SetTagType(fitag, FIDT_IFD);
FreeImage_SetTagLength(fitag, TIFFDataWidth( TIFFFieldDataType(fip) ) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_SLONG:
FreeImage_SetTagType(fitag, FIDT_SLONG);
FreeImage_SetTagLength(fitag, TIFFDataWidth( TIFFFieldDataType(fip) ) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_RATIONAL: {
// LibTIFF converts rational to floats : reconvert floats to rationals
DWORD *rvalue = (DWORD*)malloc(2 * value_count * sizeof(DWORD));
for(uint32 i = 0; i < value_count; i++) {
float *fv = (float*)raw_data;
FIRational rational(fv[i]);
rvalue[2*i] = rational.getNumerator();
rvalue[2*i+1] = rational.getDenominator();
}
FreeImage_SetTagType(fitag, FIDT_RATIONAL);
FreeImage_SetTagLength(fitag, TIFFDataWidth( TIFFFieldDataType(fip) ) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, rvalue);
free(rvalue);
}
break;
case TIFF_SRATIONAL: {
// LibTIFF converts rational to floats : reconvert floats to rationals
LONG *rvalue = (LONG*)malloc(2 * value_count * sizeof(LONG));
for(uint32 i = 0; i < value_count; i++) {
float *fv = (float*)raw_data;
FIRational rational(fv[i]);
rvalue[2*i] = rational.getNumerator();
rvalue[2*i+1] = rational.getDenominator();
}
FreeImage_SetTagType(fitag, FIDT_RATIONAL);
FreeImage_SetTagLength(fitag, TIFFDataWidth( TIFFFieldDataType(fip) ) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, rvalue);
free(rvalue);
}
break;
case TIFF_FLOAT:
FreeImage_SetTagType(fitag, FIDT_FLOAT);
FreeImage_SetTagLength(fitag, TIFFDataWidth( TIFFFieldDataType(fip) ) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_DOUBLE:
FreeImage_SetTagType(fitag, FIDT_DOUBLE);
FreeImage_SetTagLength(fitag, TIFFDataWidth( TIFFFieldDataType(fip) ) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_LONG8: // BigTIFF 64-bit unsigned integer
FreeImage_SetTagType(fitag, FIDT_LONG8);
FreeImage_SetTagLength(fitag, TIFFDataWidth( TIFFFieldDataType(fip) ) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_IFD8: // BigTIFF 64-bit unsigned integer (offset)
FreeImage_SetTagType(fitag, FIDT_IFD8);
FreeImage_SetTagLength(fitag, TIFFDataWidth( TIFFFieldDataType(fip) ) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_SLONG8: // BigTIFF 64-bit signed integer
FreeImage_SetTagType(fitag, FIDT_SLONG8);
FreeImage_SetTagLength(fitag, TIFFDataWidth( TIFFFieldDataType(fip) ) * value_count);
FreeImage_SetTagCount(fitag, value_count);
FreeImage_SetTagValue(fitag, raw_data);
break;
case TIFF_ASCII:
default: {
size_t length = 0;
if(!mem_alloc && (TIFFFieldDataType(fip) == TIFF_ASCII) && (TIFFFieldReadCount(fip) == TIFF_VARIABLE)) {
// when metadata tag is of type ASCII and it's value is of variable size (TIFF_VARIABLE),
// tiff_read_exif_tag function gives length of 1 so all strings are truncated ...
// ... try to avoid this by using an explicit calculation for 'length'
length = strlen((char*)raw_data) + 1;
}
else {
// remember that raw_data = _TIFFmalloc(value_size * value_count);
const int value_size = TIFFDataWidth( TIFFFieldDataType(fip) );
length = value_size * value_count;
}
FreeImage_SetTagType(fitag, FIDT_ASCII);
FreeImage_SetTagLength(fitag, (DWORD)length);
FreeImage_SetTagCount(fitag, (DWORD)length);
FreeImage_SetTagValue(fitag, raw_data);
}
break;
}
const char *description = tagLib.getTagDescription(md_model, (WORD)tag_id);
if(description) {
FreeImage_SetTagDescription(fitag, description);
}
// store the tag
FreeImage_SetMetadata(tagLib.getFreeImageModel(md_model), dib, FreeImage_GetTagKey(fitag), fitag);
// destroy the tag
FreeImage_DeleteTag(fitag);
if(mem_alloc) {
_TIFFfree(raw_data);
}
return TRUE;
}
/**
Convert a DPKPROPVARIANT to a FITAG, then store the tag as FIMD_EXIF_MAIN
@see ReadDescriptiveMetadata
*/
static BOOL
ReadPropVariant(WORD tag_id, const DPKPROPVARIANT & varSrc, FIBITMAP *dib) {
DWORD dwSize;
if(varSrc.vt == DPKVT_EMPTY) {
return FALSE;
}
// get the tag key
TagLib& s = TagLib::instance();
const char *key = s.getTagFieldName(TagLib::EXIF_MAIN, tag_id, NULL);
if(!key) {
return FALSE;
}
// create a tag
FITAG *tag = FreeImage_CreateTag();
if(tag) {
// set tag ID
FreeImage_SetTagID(tag, tag_id);
// set tag type, count, length and value
switch (varSrc.vt) {
case DPKVT_LPSTR:
FreeImage_SetTagType(tag, FIDT_ASCII);
dwSize = (DWORD)strlen(varSrc.VT.pszVal) + 1;
FreeImage_SetTagCount(tag, dwSize);
FreeImage_SetTagLength(tag, dwSize);
FreeImage_SetTagValue(tag, varSrc.VT.pszVal);
break;
case DPKVT_LPWSTR:
FreeImage_SetTagType(tag, FIDT_UNDEFINED);
dwSize = (DWORD)(sizeof(U16) * (wcslen((wchar_t *) varSrc.VT.pwszVal) + 1)); // +1 for NULL term
FreeImage_SetTagCount(tag, dwSize);
FreeImage_SetTagLength(tag, dwSize);
FreeImage_SetTagValue(tag, varSrc.VT.pwszVal);
break;
case DPKVT_UI2:
FreeImage_SetTagType(tag, FIDT_SHORT);
FreeImage_SetTagCount(tag, 1);
FreeImage_SetTagLength(tag, 2);
FreeImage_SetTagValue(tag, &varSrc.VT.uiVal);
break;
case DPKVT_UI4:
FreeImage_SetTagType(tag, FIDT_LONG);
FreeImage_SetTagCount(tag, 1);
FreeImage_SetTagLength(tag, 4);
FreeImage_SetTagValue(tag, &varSrc.VT.ulVal);
break;
default:
assert(FALSE); // This case is not handled
break;
}
// get the tag desctiption
const char *description = s.getTagDescription(TagLib::EXIF_MAIN, tag_id);
FreeImage_SetTagDescription(tag, description);
// store the tag
FreeImage_SetMetadata(FIMD_EXIF_MAIN, dib, key, tag);
FreeImage_DeleteTag(tag);
}
return TRUE;
}