/// <summary>
/// Authors
/// </summary>
public static List<string> GetAuthors(ImageData data)
{
if(InitializeReader(data) == false) {
return null;
}
// extract the tags
try {
XmlNode node = data.XmpDocument.SelectSingleNode("/rdf:RDF/rdf:Description/dc:creator/rdf:Seq", namespaceManager);
if(node != null) {
List<string> authors = new List<string>();
// copy the tags
foreach(XmlNode author in node) {
authors.Add(author.InnerText);
}
return authors;
}
}
catch { }
return null;
}
protected override bool AllowProperty(bool condition, ImageData data)
{
// get the author from XMP
List<string> authors = XmpReader.GetAuthors(data);
if(authors != null && authors.Count > 0) {
for(int i = 0; i < authors.Count; i++) {
if(_regularExpression) {
bool? value = IsRegexMatch(authors[i]);
if(value.HasValue && value.Value == true) {
return condition;
}
}
else {
// normal match
if(authors[i].IndexOf(_value, _matchCase ? StringComparison.CurrentCulture :
StringComparison.CurrentCultureIgnoreCase) >= 0) {
return condition;
}
}
}
}
else {
// get the author from EXIF
string text = ExifReader.GetAuthor(data);
if(text == null || _value == null) {
return !condition;
}
if(_regularExpression) {
bool? value = IsRegexMatch(text);
if(value.HasValue && value.Value == true) {
return condition;
}
}
else {
// normal match
if(text.IndexOf(_value, _matchCase ? StringComparison.CurrentCulture : StringComparison.CurrentCultureIgnoreCase) >= 0) {
return condition;
}
}
}
return !condition;
}
/// <summary>
/// Title
/// </summary>
public static string GetTitle(ImageData data)
{
if(InitializeReader(data) == false) {
return null;
}
// extract the title
try {
XmlNode node = data.XmpDocument.SelectSingleNode("/rdf:RDF/rdf:Description/dc:title/rdf:Alt", namespaceManager);
if(node != null && node.ChildNodes.Count > 0) {
return node.ChildNodes[0].InnerText;
}
}
catch { }
return null;
}
public override bool Allow(string file)
{
Debug.AssertNotNull(file, "File is null");
bool condition = _condition == FilterCondition.IS ? true : false;
ImageData data = null;
if(_helperObject != null) {
if(_helperObject is ImageData) {
_helperObject = (ImageData)_helperObject;
}
else {
_helperObject.Dispose();
}
}
else {
// create a new helper object
_helperObject = new ImageData();
data = (ImageData)_helperObject;
// load the picture
if(IsImage(file) == false || data.LoadImage(file) == false) {
// failed
return !condition;
}
}
return AllowProperty(condition, data);
}
/// <summary>
/// Orientation
/// </summary>
public static ImageOrientation? GetOrientation(ImageData data)
{
try {
PropertyItem item = data.Image.GetPropertyItem(OrientationId);
int value = BitConverter.ToInt16(item.Value, 0);
switch(value) {
case 1: {
return ImageOrientation.Correct;
}
case 6: {
return ImageOrientation.RotateRight;
}
case 8: {
return ImageOrientation.RotateLeft;
}
default: {
return ImageOrientation.Correct;
}
}
}
catch(Exception e) {
return null;
}
}
/// <summary>
/// ISO
/// </summary>
public static int? GetIso(ImageData data)
{
try {
PropertyItem item = data.Image.GetPropertyItem(IsoId);
return BitConverter.ToInt16(item.Value, 0);
}
catch(Exception e) {
return null;
}
}
/// <summary>
/// Flash fired
/// </summary>
public static bool? GetFlashFired(ImageData data)
{
try {
PropertyItem item = data.Image.GetPropertyItem(FlashFiredId);
return BitConverter.ToInt16(item.Value, 0) == 1;
}
catch(Exception e) {
return null;
}
}
/// <summary>
/// Exposure program
/// </summary>
public static ExposureProgram? GetExposureProgram(ImageData data)
{
try {
PropertyItem item = data.Image.GetPropertyItem(ExposureProgramId);
int value = BitConverter.ToInt16(item.Value, 0);
switch(value) {
case 0: {
return ExposureProgram.NotDefined;
}
case 1: {
return ExposureProgram.Manual;
}
case 2: {
return ExposureProgram.Program;
}
case 3: {
return ExposureProgram.AperaturePriority;
}
case 4: {
return ExposureProgram.ShutterPriority;
}
case 5: {
return ExposureProgram.CreativeProgram;
}
case 6: {
return ExposureProgram.ActionProgram;
}
case 7: {
return ExposureProgram.PortaitMode;
}
case 8: {
return ExposureProgram.LandscapeMode;
}
default: {
return ExposureProgram.NotDefined;
}
}
}
catch(Exception e) {
return null;
}
}
/// <summary>
/// Taken date
/// </summary>
public static DateTime? GetDateTaken(ImageData data)
{
try {
PropertyItem item = data.Image.GetPropertyItem(TakenDateId);
return DateTime.Parse(data.Ascii.GetString(item.Value));
}
catch(Exception e) {
return null;
}
}
protected override bool AllowProperty(bool condition, ImageData data)
{
ExifReader.ExposureProgram? program = ExifReader.GetExposureProgram(data);
if(program.HasValue) {
if(program.Value == _value) {
return condition;
}
}
return !condition;
}
protected override bool AllowProperty(bool condition, ImageData data)
{
DateTime? date = ExifReader.GetDateTaken(data);
if(date.HasValue) {
if(_dateImplication == DateImplication.From) {
if(date.Value.Day == _value.Day && date.Value.Month == _value.Month &&
date.Value.Year == _value.Year) {
return condition;
}
}
else if(_dateImplication == DateImplication.OlderOrFrom) {
if(date.Value <= _value) {
return condition;
}
}
else {
if(date.Value >= _value) {
return condition;
}
}
}
return !condition;
}
protected override bool AllowProperty(bool condition, ImageData data)
{
string text = ExifReader.GetCopyright(data);
if(text == null || _value == null) {
return !condition;
}
if(_regularExpression) {
bool? value = IsRegexMatch(text);
if(value.HasValue && value.Value == true) {
return condition;
}
}
else {
// normal match
if(text.IndexOf(_value, _matchCase ? StringComparison.CurrentCulture :
StringComparison.CurrentCultureIgnoreCase) >= 0) {
return condition;
}
}
return !condition;
}
/// <summary>
/// Rating
/// </summary>
public static int? GetRating(ImageData data)
{
if(InitializeReader(data) == false) {
return null;
}
// extract the rating
try {
XmlNode node = data.XmpDocument.SelectSingleNode("/rdf:RDF/rdf:Description/xap:Rating", namespaceManager);
if(node != null) {
return int.Parse(node.InnerText);
}
else {
// try to get it from Vista Photo Gallery
node = data.XmpDocument.SelectSingleNode("/rdf:RDF/rdf:Description", namespaceManager);
foreach(XmlAttribute attribute in node.Attributes) {
if(attribute.Name == "MicrosoftPhoto:Rating") {
// values are ranging from 0 to 100
// convert to 0 - 5 stars
double value = double.Parse(attribute.Value) / 100;
return (int)Math.Floor(value * 5.0);
}
}
}
}
catch { }
return null;
}
private static bool InitializeReader(ImageData data)
{
if(data.XmpDocument == null) {
string xmpData = GetXmpXmlDocFromImage(data.Stream);
if(xmpData == null || xmpData.Length == 0) {
return false;
}
data.XmpDocument = GetXmpDocument(xmpData);
// generate the namespace manager
if(data.XmpDocument != null) {
GenerateNamespaceManager(data.XmpDocument);
}
return data.XmpDocument != null;
}
else {
return true;
}
}
protected override bool AllowProperty(bool condition, ImageData data)
{
// get the list of tags
List<string> tagList = XmpReader.GetTags(data);
if(tagList != null && tagList.Count > 0) {
int count = _tags.Count;
bool result = true;
for(int i = 0; i < count; i++) {
// skip disabled tags
if(_tags[i].Enabled == false) {
continue;
}
result &= MatchTags(tagList, _tags[i]);
if(_tagImplication == TagImplication.All && result == false) {
// not all tags match
return !condition;
}
else if(_tagImplication == TagImplication.Some && result == true) {
return condition;
}
}
if(result == false) {
return !condition;
}
else {
return condition;
}
}
return !condition;
}
protected override bool AllowProperty(bool condition, ImageData data)
{
int? rating = XmpReader.GetRating(data);
// presume the rating is 0 if it couldn't be retrieved
if(rating.HasValue == false && _value > 0) {
return !condition;
}
else {
rating = 0;
}
// filter
if(_sizeImplication == SizeImplication.Equals) {
if(rating.Value == _value) {
return condition;
}
}
else if(_sizeImplication == SizeImplication.LessThan) {
if(rating.Value <= _value) {
return condition;
}
}
else {
if(rating.Value >= _value) {
return condition;
}
}
return !condition;
}
protected override bool AllowProperty(bool condition, ImageData data)
{
ExifReader.Fraction time = ExifReader.GetExposureTime(data);
if(time != null) {
// invalid values, would throw a DivideByZeroException
if(time.Denominator == 0 || _value.Denominator == 0) {
return !condition;
}
double a = (double)time.Numerator / (double)time.Denominator;
double b = (double)_value.Numerator / (double)_value.Denominator;
if(_sizeImplication == SizeImplication.Equals) {
if(Math.Abs(b - a) < Epsilon) {
return condition;
}
}
else if(_sizeImplication == SizeImplication.LessThan) {
if(b <= a) {
return condition;
}
}
else {
if(b >= a) {
return condition;
}
}
}
return !condition;
}
/// <summary>
/// Exposure bias
/// </summary>
public static double? GetExposureBias(ImageData data)
{
try {
PropertyItem item = data.Image.GetPropertyItem(ExposureBiasId);
return (double)BitConverter.ToInt16(item.Value, 0) / 2.0;
}
catch(Exception e) {
return null;
}
}
protected override bool AllowProperty(bool condition, ImageData data)
{
bool? fired = ExifReader.GetFlashFired(data);
if(fired.HasValue) {
if(fired.Value == _value) {
return condition;
}
}
return !condition;
}
/// <summary>
/// Exposure time
/// </summary>
public static Fraction GetExposureTime(ImageData data)
{
try {
PropertyItem item = data.Image.GetPropertyItem(ExposureTimeId);
Fraction value = new Fraction(BitConverter.ToInt16(item.Value, 0), BitConverter.ToInt16(item.Value, 4));
// simplify fraction
if(value.Denominator % 10 == 0 && value.Numerator % 10 == 0) {
value.Denominator /= 10;
value.Numerator /= 10;
}
return value;
}
catch(Exception e) {
return null;
}
}
protected override bool AllowProperty(bool condition, ImageData data)
{
double? number = ExifReader.GetFNumber(data);
if(number.HasValue) {
if(_sizeImplication == SizeImplication.Equals) {
if(Math.Abs(number.Value - _value) < Epsilon) {
return condition;
}
}
else if(_sizeImplication == SizeImplication.LessThan) {
if(number.Value <= _value) {
return condition;
}
}
else {
if(number.Value >= _value) {
return condition;
}
}
}
return !condition;
}
/// <summary>
/// FNumber
/// </summary>
public static double? GetFNumber(ImageData data)
{
try {
PropertyItem item = data.Image.GetPropertyItem(FNumberId);
int value = BitConverter.ToInt16(item.Value, 0);
if(value < 100) {
return Math.Round((double)value / 10, 1);
}
else {
return value;
}
}
catch(Exception e) {
return null;
}
}
protected override bool AllowProperty(bool condition, ImageData data)
{
int? iso = ExifReader.GetIso(data);
if(iso.HasValue) {
if(_sizeImplication == SizeImplication.Equals) {
if(iso.Value == _value) {
return condition;
}
}
else if(_sizeImplication == SizeImplication.LessThan) {
if(iso.Value <= _value) {
return condition;
}
}
else {
if(iso.Value >= _value) {
return condition;
}
}
}
return !condition;
}
/// <summary>
/// Metering mode
/// </summary>
public static MeteringMode? GetMeteringMode(ImageData data)
{
try {
PropertyItem item = data.Image.GetPropertyItem(ExposureBiasId);
int value = BitConverter.ToInt16(item.Value, 0);
switch(value) {
case 0: {
return MeteringMode.Unknown;
}
case 1: {
return MeteringMode.AverageMetering;
}
case 2: {
return MeteringMode.CenterWeightedAverageMetering;
}
case 3: {
return MeteringMode.SpotMetering;
}
case 4: {
return MeteringMode.MultiSpotMetering;
}
case 5: {
return MeteringMode.MatrixMetering;
}
case 6: {
return MeteringMode.PartialMetering;
}
default: {
return MeteringMode.AverageMetering;
}
}
}
catch(Exception e) {
return null;
}
}
protected override bool AllowProperty(bool condition, ImageData data)
{
ExifReader.MeteringMode? mode = ExifReader.GetMeteringMode(data);
if(mode.HasValue) {
if(mode.Value == _value) {
return condition;
}
}
return !condition;
}
/// <summary>
/// Camera maker
/// </summary>
public static string GetTitle(ImageData data)
{
try {
PropertyItem item = data.Image.GetPropertyItem(TitleId);
return data.Ascii.GetString(item.Value);
}
catch(Exception e) {
return null;
}
}
protected override bool AllowProperty(bool condition, ImageData data)
{
ExifReader.ImageOrientation? orientation = ExifReader.GetOrientation(data);
if(orientation.HasValue && orientation.Value == _value) {
return condition;
}
return !condition;
}
/// <summary> /// Abstract method that needs to be implemented in the derived objects /// </summary> protected abstract bool AllowProperty(bool condition, ImageData data);
/// <summary>
/// Tags
/// </summary>
public static List<string> GetTags(ImageData data)
{
if(InitializeReader(data) == false) {
return null;
}
// extract the tags
try {
XmlNode node = data.XmpDocument.SelectSingleNode("/rdf:RDF/rdf:Description/dc:subject/rdf:Bag", namespaceManager);
if(node != null) {
List<string> tags = new List<string>();
// copy the tags
foreach(XmlNode tag in node) {
tags.Add(tag.InnerText);
}
return tags;
}
}
catch { }
return null;
}
