/// <summary>
/// Creates a new instance of the ExifReader class initialized with the specified PropertyItem array.
/// </summary>
/// <param name="oPropertyItems">Specifies an array of property items to read from.</param>
public ExifReader(PropertyItem[] oPropertyItems)
{
if (oPropertyItems != null)
m_oPropertyItems = oPropertyItems;
else
throw new ArgumentNullException("oPropertyItems", "The specified parameter cannot be null.");
}
internal static PropertyItem[] ConvertFromMemory(IntPtr propdata, int count) {
PropertyItem[] props = new PropertyItem[count];
for (int i=0; i<count; i++) {
PropertyItemInternal propcopy = null;
try {
propcopy = (PropertyItemInternal) UnsafeNativeMethods.PtrToStructure(propdata,
typeof(PropertyItemInternal));
props[i] = new PropertyItem();
props[i].Id = propcopy.id;
props[i].Len = propcopy.len;
props[i].Type = propcopy.type;
// this calls Marshal.Copy and creates a copy of the original memory into a byte array.
props[i].Value = propcopy.Value;
propcopy.value = IntPtr.Zero; // we dont actually own this memory so dont free it.
}
finally {
if (propcopy != null) {
propcopy.Dispose();
}
}
propdata = (IntPtr)((long)propdata + (int)Marshal.SizeOf(typeof(PropertyItemInternal)));
}
return props;
}
/// <summary>
/// Returns the first PropertyItem with a matching ID
/// </summary>
/// <param name="items"></param>
/// <param name="id"></param>
/// <returns></returns>
protected static PropertyItem getById(PropertyItem[] items, int id)
{
for (int i = 0; i < items.Length; i++)
if (items[i] != null && items[i].Id == id)
return items[i];
return null;
}
public ExifProperty(PropertyItem propertyItem)
{
if (propertyItem == null) throw new ArgumentNullException("propertyItem");
item = propertyItem;
CreateTag();
CreateValue();
}
protected static int GetLoops(PropertyItem[] items)
{
// http://weblogs.asp.net/justin_rogers/archive/2004/01/19/60424.aspx
//Property item ID 20737
PropertyItem pi = getById(items, 20737);
if (pi == null) return 0;
//Combine bytes into integers
return pi.Value[0] + (pi.Value[1] << 8);
}
/// <summary>
/// 以原始形式设置指定的属性
/// </summary>
/// <param name="PID"></param>
/// <param name="Data"></param>
/// <param name="Type"></param>
private void SetProperty(Int32 PID, byte[] Data, ExifDataTypes Type)
{
System.Drawing.Imaging.PropertyItem P = this._Image.PropertyItems[0];
P.Id = PID;
P.Value = Data;
P.Type = (Int16)Type;
P.Len = Data.Length;
this._Image.SetPropertyItem(P);
}
public static void SaveThumbnail(Image thumb, ushort rating, string filePath)
{
string thumbPath = GetThumbPath(filePath);
if (ratingProperty == null)
{
System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(ThumbUtility));
ratingProperty = ((System.Drawing.Image)(resources.GetObject("rating"))).GetPropertyItem(18246);
}
ratingProperty.Value = BitConverter.GetBytes(rating);
thumb.SetPropertyItem(ratingProperty);
thumb.Save(thumbPath, ImageFormat.Jpeg);
}
// funzione utilizzata per l'estrazione dei metadati
private static double DecodeRational64u(System.Drawing.Imaging.PropertyItem propertyItem)
{
uint dN = BitConverter.ToUInt32(propertyItem.Value, 0);
uint dD = BitConverter.ToUInt32(propertyItem.Value, 4);
uint mN = BitConverter.ToUInt32(propertyItem.Value, 8);
uint mD = BitConverter.ToUInt32(propertyItem.Value, 12);
uint sN = BitConverter.ToUInt32(propertyItem.Value, 16);
uint sD = BitConverter.ToUInt32(propertyItem.Value, 20);
decimal deg;
decimal min;
decimal sec;
if (dD > 0)
{
deg = (decimal)dN / dD;
}
else
{
deg = dN;
}
if (mD > 0)
{
min = (decimal)mN / mD;
}
else
{
min = mN;
}
if (sD > 0)
{
sec = (decimal)sN / sD;
}
else
{
sec = sN;
}
double deg1 = (double)deg;
double min1 = (double)min;
double sec1 = (double)sec;
if (sec == 0)
{
double conversion = ConvertDegreeAngleToDouble(deg1, min1, sec1);
return(conversion);
}
else
{
double conversion = ConvertDegreeAngleToDouble(deg1, min1, sec1);
return(conversion);
}
}
protected static int[] GetDelays(PropertyItem[] items)
{
//Property item ID 20736 http://bytes.com/groups/net-vb/692099-problem-animated-gifs
PropertyItem pi = getById(items, 20736);
if (pi == null) return null;
//Combine bytes into integers
int[] vals = new int[pi.Value.Length / 4];
for (int i = 0; i < pi.Value.Length; i+=4){
vals[i / 4] = BitConverter.ToInt32(pi.Value, i);
}
return vals;
}
public static void SetPropertyItems(Image image, PropertyItem[] items)
{
PropertyItem[] pis = image.PropertyItems;
foreach (PropertyItem pi in pis)
{
image.RemovePropertyItem(pi.Id);
}
foreach (PropertyItem pi in items)
{
image.SetPropertyItem(pi);
}
}
public static void LoadProperties(Image dstImage, Document srcDoc, Func <System.Drawing.Imaging.PropertyItem, bool> selectorFn)
{
Bitmap bitmap = dstImage as Bitmap;
if (bitmap != null)
{
float dpuX;
float dpuY;
switch (srcDoc.DpuUnit)
{
case MeasurementUnit.Inch:
dpuX = (float)srcDoc.DpuX;
dpuY = (float)srcDoc.DpuY;
break;
case MeasurementUnit.Centimeter:
dpuX = (float)Document.DotsPerCmToDotsPerInch(srcDoc.DpuX);
dpuY = (float)Document.DotsPerCmToDotsPerInch(srcDoc.DpuY);
break;
default:
dpuX = 1f;
dpuY = 1f;
break;
}
try
{
bitmap.SetResolution(dpuX, dpuY);
}
catch (Exception)
{
}
}
Metadata metadata = srcDoc.Metadata;
foreach (string str in metadata.GetKeys("$exif"))
{
System.Drawing.Imaging.PropertyItem arg = PdnGraphics.DeserializePropertyItem(metadata.GetValue("$exif", str));
if (selectorFn(arg))
{
try
{
dstImage.SetPropertyItem(arg);
}
catch (ArgumentException)
{
}
}
}
}
//My SetProperty code... (for ASCII property items only!)
//Exif 2.2 requires that ASCII property items terminate with a null (0x00).
private static void SetProperty(ref System.Drawing.Imaging.PropertyItem prop, int iId, string sTxt)
{
int iLen = sTxt.Length + 1;
byte[] bTxt = new Byte[iLen];
for (int i = 0; i < iLen - 1; i++)
{
bTxt[i] = (byte)sTxt[i];
}
bTxt[iLen - 1] = 0x00;
prop.Id = iId;
prop.Type = 2;
prop.Value = bTxt;
prop.Len = iLen;
}
public static PropertyItem GetPropertyItem(int id, string value)
{
if (propertyItem == null)
{
System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(PropertyItemProvider));
Bitmap bmp = (Bitmap)resources.GetObject("propertyitemcontainer");
propertyItem = bmp.GetPropertyItem(bmp.PropertyIdList[0]);
propertyItem.Type = 2; // string
}
propertyItem.Id = id;
System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
propertyItem.Value = encoding.GetBytes(value + " ");
propertyItem.Len = value.Length + 1;
return propertyItem;
}
public static string DecodeAsciiValue(PropertyItem pi)
{
if (pi.Type != (short)ExifTagType.Ascii)
{
throw new ArgumentException("pi.Type != ExifTagType.Ascii");
}
string data = System.Text.Encoding.ASCII.GetString(pi.Value);
if (data[data.Length - 1] == '\0')
{
data = data.Substring(0, data.Length - 1);
}
return data;
}
private static string DecodeRational64u(System.Drawing.Imaging.PropertyItem propertyItem)
{
uint dN = BitConverter.ToUInt32(propertyItem.Value, 0);
uint dD = BitConverter.ToUInt32(propertyItem.Value, 4);
uint mN = BitConverter.ToUInt32(propertyItem.Value, 8);
uint mD = BitConverter.ToUInt32(propertyItem.Value, 12);
uint sN = BitConverter.ToUInt32(propertyItem.Value, 16);
uint sD = BitConverter.ToUInt32(propertyItem.Value, 20);
decimal deg;
decimal min;
decimal sec;
// Found some examples where you could get a zero denominator and no one likes to devide by zero
if (dD > 0)
{
deg = (decimal)dN / dD;
}
else
{
deg = dN;
}
if (mD > 0)
{
min = (decimal)mN / mD;
}
else
{
min = mN;
}
if (sD > 0)
{
sec = (decimal)sN / sD;
}
else
{
sec = sN;
}
if (sec == 0)
{
return(string.Format("{0}° {1:0.###}'", deg, min));
}
else
{
return(string.Format("{0}° {1:0}' {2:0.#}\"", deg, min, sec));
}
}
internal static PropertyItemInternal ConvertFromPropertyItem(PropertyItem propItem) {
PropertyItemInternal propItemInternal = new PropertyItemInternal();
propItemInternal.id = propItem.Id;
propItemInternal.len = 0;
propItemInternal.type = propItem.Type;
byte[] propItemValue = propItem.Value;
if (propItemValue != null) {
int length = propItemValue.Length;
propItemInternal.len = length;
propItemInternal.value = Marshal.AllocHGlobal(length);
Marshal.Copy(propItemValue, 0, propItemInternal.value, length);
}
return propItemInternal;
}
/// <summary>
/// Copies the given PropertyItem.
/// </summary>
/// <param name="pi">The PropertyItem to clone.</param>
/// <returns>A copy of the given PropertyItem.</returns>
public static PropertyItem ClonePropertyItem(PropertyItem pi)
{
byte[] valueClone;
if (pi.Value == null)
{
valueClone = new byte[0];
}
else
{
valueClone = (byte[])pi.Value.Clone();
}
PropertyItem2 pi2 = new PropertyItem2(pi.Id, pi.Len, pi.Type, valueClone);
return pi2.ToPropertyItem();
}
internal static PropertyItemInternal ConvertFromPropertyItem(PropertyItem propItem)
{
PropertyItemInternal internal2 = new PropertyItemInternal {
id = propItem.Id,
len = 0,
type = propItem.Type
};
byte[] source = propItem.Value;
if (source != null)
{
int length = source.Length;
internal2.len = length;
internal2.value = Marshal.AllocHGlobal(length);
Marshal.Copy(source, 0, internal2.value, length);
}
return internal2;
}
private static GeoCoords DecodeRational64U(System.Drawing.Imaging.PropertyItem propertyItem)
{
var dN = BitConverter.ToUInt32(propertyItem.Value, 0);
var dD = BitConverter.ToUInt32(propertyItem.Value, 4);
var mN = BitConverter.ToUInt32(propertyItem.Value, 8);
var mD = BitConverter.ToUInt32(propertyItem.Value, 12);
var sN = BitConverter.ToUInt32(propertyItem.Value, 16);
var sD = BitConverter.ToUInt32(propertyItem.Value, 20);
double deg;
double min;
double sec;
if (dD > 0)
{
deg = (double)dN / dD;
}
else
{
deg = dN;
}
if (mD > 0)
{
min = (double)mN / mD;
}
else
{
min = mN;
}
if (sD > 0)
{
sec = (double)sN / sD;
}
else
{
sec = sN;
}
return(new GeoCoords
{
Degree = deg,
Minute = min,
Second = sec
});
}
/// <summary>
/// Initializes a new instance of the ExifProperty class.
/// It's marked internal as it's not intended to be instantiated independently outside of the library.
/// </summary>
/// <param name="propertyItem">The PropertyItem to base the object on</param>
/// <param name="parentReader">The parent ExifReader</param>
internal ExifProperty(PropertyItem propertyItem, ExifReader parentReader)
{
this.parentReader = parentReader;
this.propertyItem = propertyItem;
this.isUnknown = !Enum.IsDefined(typeof(PropertyTagId), this.RawExifTagId);
var customFormatter = this.parentReader.QueryForCustomPropertyFormatter(this.RawExifTagId);
if (customFormatter == null)
{
this.propertyFormatter = ExifPropertyFormatterProvider.GetExifPropertyFormatter(this.ExifTag);
}
else
{
this.propertyFormatter = customFormatter;
this.hasCustomFormatter = true;
}
}
/************************************************************************
* The Input: a path to an image.
* The Output: The datetime.
* The Function operation: The function finds the image's datetime.
*************************************************************************/
public static DateTime GetDateTakenFromImage(string path)
{
using (FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read))
using (Image myImage = Image.FromStream(fs, false, false))
{
try
{
System.Drawing.Imaging.PropertyItem propItem = myImage.GetPropertyItem(36867);
string dateTaken = r.Replace(Encoding.UTF8.GetString(propItem.Value), "-", 2);
return(DateTime.Parse(dateTaken));
}
catch
{
//Incase the image doesn't have a date return the files date.
return(File.GetCreationTime(path));
}
}
}
internal static PropertyItem[] ConvertFromMemory(IntPtr propdata, int count)
{
PropertyItem[] itemArray = new PropertyItem[count];
for (int i = 0; i < count; i++)
{
using (PropertyItemInternal internal2 = null)
{
internal2 = (PropertyItemInternal) UnsafeNativeMethods.PtrToStructure(propdata, typeof(PropertyItemInternal));
itemArray[i] = new PropertyItem();
itemArray[i].Id = internal2.id;
itemArray[i].Len = internal2.len;
itemArray[i].Type = internal2.type;
itemArray[i].Value = internal2.Value;
internal2.value = IntPtr.Zero;
}
propdata = (IntPtr) (((long) propdata) + Marshal.SizeOf(typeof(PropertyItemInternal)));
}
return itemArray;
}
public static byte DecodeByteValue(PropertyItem pi)
{
if (pi.Type != (short)ExifTagType.Byte)
{
throw new ArgumentException("pi.Type != ExifTagType.Byte");
}
if (pi.Value.Length != 1)
{
throw new ArgumentException("pi.Value.Length != 1");
}
if (pi.Len != 1)
{
throw new ArgumentException("pi.Length != 1");
}
return pi.Value[0];
}
private static string GetValueOfType(PropertyItem propItem)
{
switch (propItem.Type)
{
case 1:
return EXIFMetaDataService.GetValueOfType1(propItem.Value);
case 2:
return EXIFMetaDataService.GetValueOfType2(propItem.Value);
case 3:
return EXIFMetaDataService.GetValueOfType3(propItem.Value);
case 4:
return EXIFMetaDataService.GetValueOfType4(propItem.Value);
case 5:
return EXIFMetaDataService.GetValueOfType5(propItem.Value);
case 7:
return EXIFMetaDataService.GetValueOfType7(propItem.Value, propItem.Id);
}
return string.Empty;
}
private static decimal DecodeRational64uTest(System.Drawing.Imaging.PropertyItem propertyItem)
{
uint dN = BitConverter.ToUInt32(propertyItem.Value, 0);
uint dD = BitConverter.ToUInt32(propertyItem.Value, 4);
uint mN = BitConverter.ToUInt32(propertyItem.Value, 8);
uint mD = BitConverter.ToUInt32(propertyItem.Value, 12);
uint sN = BitConverter.ToUInt32(propertyItem.Value, 16);
uint sD = BitConverter.ToUInt32(propertyItem.Value, 20);
decimal deg;
decimal min;
decimal sec;
// Found some examples where you could get a zero denominator and no one likes to devide by zero
if (dD > 0)
{
deg = (decimal)dN / dD;
}
else
{
deg = dN;
}
if (mD > 0)
{
min = (decimal)mN / mD;
}
else
{
min = mN;
}
if (sD > 0)
{
sec = (decimal)sN / sD;
}
else
{
sec = sN;
}
// Decimal Degrees = Degrees + minutes / 60 + seconds / 3600
return(deg + min / 60 + sec / 3600);
}
private DateTime getExifDateTaken(string path)
{
using (FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read))
using (Image myImage = Image.FromStream(fs, false, false))
{
System.Drawing.Imaging.PropertyItem propertyItem = myImage.GetPropertyItem(36867);
if (propertyItem != null)
{
// Extract the property value as a String.
System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
string text = encoding.GetString(propertyItem.Value, 0, propertyItem.Len - 1);
// Parse the date and time.
System.Globalization.CultureInfo provider = CultureInfo.InvariantCulture;
DateTime dateCreated = DateTime.ParseExact(text, "yyyy:MM:d H:m:s", provider);
return(dateCreated);
}
return(new DateTime());
}
}
/// <summary>
/// Obtiene la propiedad EXIF de la imagen
/// </summary>
/// <param name="bmp">Objeto imagen</param>
/// <param name="propertyType">Propiedad que se quiere obtener</param>
/// <returns>Valor de la propiedad</returns>
public static string GetPropiedadImage(Bitmap bmp, ImagePropertyIDTags propertyType)
{
string result = null;
try
{
System.Drawing.Imaging.PropertyItem item = bmp.GetPropertyItem((int)propertyType);
object value = Images.GetPropertyImageValue(item);
if (value != null)
{
result = value.ToString();
}
}
catch (Exception ex)
{
// throw ex;
}
return(result);
}
private void SetPropertyValue(Image bmp, int ID, short Type, byte[] value)
{
foreach (PropertyItem item in bmp.PropertyItems)
{
if (item.Id == ID)
{
item.Type = Type;
item.Value = value;
item.Len = value.Length;
bmp.SetPropertyItem(item);
return;
}
}
System.Drawing.Imaging.PropertyItem p1 = _headerSeed.PropertyItems[0];
// 緯度
p1.Id = ID;
p1.Type = Type;
p1.Value = value;
p1.Len = value.Length;
bmp.SetPropertyItem(p1);
}
/// <summary>
/// Establece el valor de la propiedad EXIF de la imagen
/// </summary>
/// <param name="bmp">Objeto imagen</param>
/// <param name="propertyType">Propiedad que se quiere modificar</param>
/// <param name="value">Valor de la propiedad</param>
/// <returns>Objeto imagen</returns>
public static Bitmap SetPropiedadImage(Bitmap bmp, ImagePropertyIDTags propertyType, String value)
{
System.Drawing.Imaging.PropertyItem item = null;
try
{
item = bmp.GetPropertyItem((int)propertyType);
}
catch (Exception ex)
{
item = Images.createPropertyItem();
}
switch (propertyType)
{
case ImagePropertyIDTags.GpsLongitude:
case ImagePropertyIDTags.GpsLatitude:
string[] values = value.Split(";".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
item.Type = (short)PropertyTagType.SRational;
item.Value = new byte[24];
item.Value[0] = Convert.ToByte(Convert.ToInt32(values[0]));
item.Value[4] = 1;
item.Value[8] = Convert.ToByte(Convert.ToInt32(values[1]));
item.Value[12] = 1;
item.Value[16] = Convert.ToByte(Convert.ToInt32(values[2]));
item.Value[20] = 1;
break;
default:
item.Type = (short)PropertyTagType.ASCII;
item.Value = System.Text.Encoding.ASCII.GetBytes(value);
break;
}
item.Id = (int)propertyType;
item.Len = item.Value.Length;
bmp.SetPropertyItem(item);
return(bmp);
}
public static String GetImageDate(string filePath, string datetype = "datetime")
{
System.Drawing.Image myImage = Image.FromFile(filePath);
String date = " ";
try
{
System.Drawing.Imaging.PropertyItem propItem = myImage.GetPropertyItem(36867);
string dateTaken = new System.Text.RegularExpressions.Regex(":").Replace(System.Text.Encoding.UTF8.GetString(propItem.Value), "-", 2);
Console.WriteLine(datetype);
if (datetype == "datetime")
{
date = System.DateTime.Parse(dateTaken).ToString();
}
else
{
date = System.DateTime.Parse(dateTaken).ToShortDateString();
}
}
catch (Exception e) { }
return(date);
}
public static void DecodeRationalValue(PropertyItem pi, out int numerator, out int denominator)
{
if (pi.Type != (short)ExifTagType.SRational)
{
throw new ArgumentException("pi.Type != ExifTagType.SRational");
}
if (pi.Value.Length != 8)
{
throw new ArgumentException("pi.Value.Length != 8");
}
if (pi.Len != 8)
{
throw new ArgumentException("pi.Length != 8");
}
numerator = pi.Value[0] + (pi.Value[1] << 8) + (pi.Value[2] << 16) + (pi.Value[3] << 24);
denominator = pi.Value[4] + (pi.Value[5] << 8) + (pi.Value[6] << 16) + (pi.Value[7] << 24);
}
public static ushort DecodeShortValue(PropertyItem pi)
{
if (pi.Type != (short)ExifTagType.Short)
{
throw new ArgumentException("pi.Type != ExifTagType.Short");
}
if (pi.Value.Length != 2)
{
throw new ArgumentException("pi.Value.Length != 2");
}
if (pi.Len != 2)
{
throw new ArgumentException("pi.Length != 2");
}
return (ushort)(pi.Value[0] + (pi.Value[1] << 8));
}
public static int DecodeSLongValue(PropertyItem pi)
{
if (pi.Type != (short)ExifTagType.SLong)
{
throw new ArgumentException("pi.Type != ExifTagType.SLong");
}
if (pi.Value.Length != 4)
{
throw new ArgumentException("pi.Value.Length != 4");
}
if (pi.Len != 4)
{
throw new ArgumentException("pi.Length != 4");
}
return pi.Value[0] + (pi.Value[1] << 8) + (pi.Value[2] << 16) + (pi.Value[3] << 24);
}
public static object GetValueObject(PropertyItem property)
{
if (property == null)
return null;
switch ((PropertyTagType)property.Type)
{
//ASCII
case PropertyTagType.ASCII:
ASCIIEncoding encoding = new ASCIIEncoding();
return encoding.GetString(property.Value, 0, property.Len - 1);
//BYTE
case PropertyTagType.Byte:
if (property.Len == 1)
return property.Value[0];
else
return property.Value;
//LONG
case PropertyTagType.Long:
uint[] resultLong = new uint[property.Len / 4];
for (int i = 0; i < resultLong.Length; i++)
resultLong[i] = BitConverter.ToUInt32(property.Value, i * 4);
if (resultLong.Length == 1)
return resultLong[0];
else
return resultLong;
//SHORT
case PropertyTagType.Short:
ushort[] resultShort = new ushort[property.Len / 2];
for (int i = 0; i < resultShort.Length; i++)
resultShort[i] = BitConverter.ToUInt16(property.Value, i * 2);
if (resultShort.Length == 1)
return resultShort[0];
else
return resultShort;
//SLONG
case PropertyTagType.SLONG:
int[] resultSLong = new int[property.Len / 4];
for (int i = 0; i < resultSLong.Length; i++)
resultSLong[i] = BitConverter.ToInt32(property.Value, i * 4);
if (resultSLong.Length == 1)
return resultSLong[0];
else
return resultSLong;
//RATIONAL
case PropertyTagType.Rational:
Fraction[] resultRational = new Fraction[property.Len / 8];
uint uNumerator;
uint uDenumerator;
for (int i = 0; i < resultRational.Length; i++)
{
uNumerator = BitConverter.ToUInt32(property.Value, i * 8);
uDenumerator = BitConverter.ToUInt32(property.Value, i * 8 + 4);
resultRational[i] = new Fraction(uNumerator, uDenumerator);
}
if (resultRational.Length == 1)
return resultRational[0];
else
return resultRational;
//SRATIONAL
case PropertyTagType.SRational:
Fraction[] resultSRational = new Fraction[property.Len / 8];
int sNumerator;
int sDenumerator;
for (int i = 0; i < resultSRational.Length; i++)
{
sNumerator = BitConverter.ToInt32(property.Value, i * 8);
sDenumerator = BitConverter.ToInt32(property.Value, i * 8 + 4);
resultSRational[i] = new Fraction(sNumerator, sDenumerator);
}
if (resultSRational.Length == 1)
return resultSRational[0];
else
return resultSRational;
//UNDEFINE
default:
if (property.Len == 1)
return property.Value[0];
else
return property.Value;
}
}
/// <summary>
/// Obtiene el valor de una propiedad
/// </summary>
/// <param name="item">Propiedad EXIF de la imagen</param>
/// <returns>Devuelve el valor de la propiedad</returns>
public static object GetPropertyImageValue(System.Drawing.Imaging.PropertyItem item)
{
Object propValue = new Object();
switch ((PropertyTagType)item.Type)
{
case PropertyTagType.ASCII:
ASCIIEncoding encoding = new ASCIIEncoding();
propValue = encoding.GetString(item.Value, 0, item.Len - 1);
break;
case PropertyTagType.Int16:
propValue = BitConverter.ToInt16(item.Value, 0);
break;
case PropertyTagType.SLONG:
case PropertyTagType.Int32:
propValue = BitConverter.ToInt32(item.Value, 0);
break;
case PropertyTagType.SRational:
case PropertyTagType.Rational:
uint degreesNumerator = BitConverter.ToUInt32(item.Value, 0);
uint degreesDenominator = BitConverter.ToUInt32(item.Value, 4);
uint minutesNumerator = BitConverter.ToUInt32(item.Value, 8);
uint minutesDenominator = BitConverter.ToUInt32(item.Value, 12);
uint secondsNumerator = BitConverter.ToUInt32(item.Value, 16);
uint secondsDenominator = BitConverter.ToUInt32(item.Value, 20);
if (degreesDenominator != 0)
{
propValue = ((double)degreesNumerator / (double)degreesDenominator).ToString();
}
else
{
propValue = "0";
}
if (minutesDenominator != 0)
{
propValue += ";" + ((double)minutesNumerator / (double)minutesDenominator).ToString();
}
else
{
propValue = "0";
}
if (secondsDenominator != 0)
{
propValue += ";" + ((double)secondsNumerator / (double)secondsDenominator).ToString();
}
else
{
propValue = "0";
}
if (propValue.ToString() == "NaN")
{
propValue = "0";
}
break;
case PropertyTagType.Undefined:
propValue = "Undefined Data";
break;
}
return(propValue);
}
private static void CopyMetadata(PropertyItem[] properties, Image target) {
foreach (PropertyItem property in properties) {
try {
target.SetPropertyItem(property);
}
catch (ArgumentException) {
// just ignore it; on some configurations this fails
}
}
}
public EXIFPropertyItem(PropertyItem prop)
{
// Does KnownEXIFCodes have a corresponding entry?
if (Enum.IsDefined(exifCode.GetType(), prop.Id))
{
exifCode = (KnownEXIFIDCodes)prop.Id;
}
else
{
exifCode = KnownEXIFIDCodes.UnknownCode;
}
exifType = (EXIFPropertyTypes)prop.Type;
data = prop.Value;
this.type = prop.Type;
this.id = prop.Id;
this.len = prop.Len;
}
static string PropertyTypeAndSize(PropertyItem item) {
int divide;
switch((PropertyTagType)item.Type) {
case PropertyTagType.Byte: divide = 1; break;
case PropertyTagType.Long: divide = 4; break;
case PropertyTagType.Rational: divide = 8; break;
case PropertyTagType.Short: divide = 2; break;
case PropertyTagType.SRational: divide = 4; break;
default: divide = 0; break;
}
if ((divide != 0) && ((item.Len / divide) > 1)) {
return String.Format("{0}[{1}]", Enum.GetName(typeof(PropertyTagType), item.Type).ToString(), item.Len / divide);
}
return Enum.GetName(typeof(PropertyTagType), item.Type);
}
private static float ExifGpsToFloat(PropertyItem propItemRef, PropertyItem propItem)
{
uint degreesNumerator = BitConverter.ToUInt32(propItem.Value, 0);
uint degreesDenominator = BitConverter.ToUInt32(propItem.Value, 4);
float degrees = degreesNumerator / (float)degreesDenominator;
uint minutesNumerator = BitConverter.ToUInt32(propItem.Value, 8);
uint minutesDenominator = BitConverter.ToUInt32(propItem.Value, 12);
float minutes = minutesNumerator / (float)minutesDenominator;
uint secondsNumerator = BitConverter.ToUInt32(propItem.Value, 16);
uint secondsDenominator = BitConverter.ToUInt32(propItem.Value, 20);
float seconds = secondsNumerator / (float)secondsDenominator;
float coorditate = degrees + (minutes / 60f) + (seconds / 3600f);
string gpsRef = System.Text.Encoding.ASCII.GetString(new byte[1] { propItemRef.Value[0] }); //N, S, E, or W
if (gpsRef == "S" || gpsRef == "W")
coorditate = 0 - coorditate;
return coorditate;
}
protected void btnTest_Click(object sender, EventArgs e)
{
StringBuilder sb = new StringBuilder();
foreach (Controls_mfbFileUpload fu in mfbMultiFileUpload1.FileUploadControls)
{
if (fu.HasFile)
{
sb.AppendFormat(CultureInfo.InvariantCulture, "<hr /><br />File: {0}<br />", fu.PostedFile.FileName);
System.Drawing.Image image = System.Drawing.Image.FromStream(fu.PostedFile.InputStream, false, false);
try
{
System.Drawing.Imaging.PropertyItem p = image.GetPropertyItem((int)PropertyTagId.GpsLatitudeRef);
sb.Append("Got latitudeRef; ");
sb.AppendFormat(CultureInfo.CurrentCulture, "Latitude Ref: {0}<br />", (string)PropertyTag.getValue(p));
}
catch (ArgumentException ex)
{
sb.AppendFormat(CultureInfo.CurrentCulture, "Latitude Ref: Not found! {0}<br />", ex.Message);
}
try
{
System.Drawing.Imaging.PropertyItem p = image.GetPropertyItem((int)PropertyTagId.GpsLatitude);
sb.Append("Got latitude; ");
Fraction[] f = (Fraction[])PropertyTag.getValue(p);
sb.AppendFormat(CultureInfo.CurrentCulture, "has {0} elements; ", f.Length);
sb.AppendFormat(CultureInfo.CurrentCulture, "Latitude values: {0}, {1}, {2}<br />", f[0], f[1], f[2]);
}
catch (ArgumentException ex)
{
sb.AppendFormat(CultureInfo.CurrentCulture, "Latitudes values: Not Found! {0}<br />", ex.Message);
}
try
{
System.Drawing.Imaging.PropertyItem p = image.GetPropertyItem((int)PropertyTagId.GpsLongitudeRef);
sb.Append("Got longitudeRef; ");
sb.AppendFormat(CultureInfo.CurrentCulture, "Longitude Ref: {0}<br />", (string)PropertyTag.getValue(p));
}
catch (ArgumentException ex)
{
sb.AppendFormat(CultureInfo.CurrentCulture, "Longitude Ref: Not found! {0}<br />", ex.Message);
}
try
{
System.Drawing.Imaging.PropertyItem p = image.GetPropertyItem((int)PropertyTagId.GpsLongitude);
sb.Append("Got longitude; ");
Fraction[] f = (Fraction[])PropertyTag.getValue(p);
sb.AppendFormat(CultureInfo.CurrentCulture, "has {0} elements; ", f.Length);
sb.AppendFormat(CultureInfo.CurrentCulture, "Longitude values: {0}, {1}, {2}<br />", f[0], f[1], f[2]);
}
catch (ArgumentException ex)
{
sb.AppendFormat(CultureInfo.CurrentCulture, "Longitude values: Not Found! {0}<br />", ex.Message);
}
}
}
lblDiagnose.Text = sb.ToString();
}
//取得图片的EXIF信息#region 取得图片的EXIF信息
public Metadata GetEXIFMetaData(string PhotoName) {
// 创建一个图片的实例
System.Drawing.Image MyImage = System.Drawing.Image.FromFile(PhotoName);
// 创建一个整型数组来存储图像中属性数组的ID
int[] MyPropertyIdList = MyImage.PropertyIdList;
//创建一个封闭图像属性数组的实例
PropertyItem[] MyPropertyItemList = new PropertyItem[MyPropertyIdList.Length];
//创建一个图像EXIT信息的实例结构对象，并且赋初值
//创建一个图像EXIT信息的实例结构对象，并且赋初值#region 创建一个图像EXIT信息的实例结构对象，并且赋初值
Metadata MyMetadata = new Metadata();
MyMetadata.EquipmentMake.Hex = "10f";
MyMetadata.CameraModel.Hex = "110";
MyMetadata.DatePictureTaken.Hex = "9003";
MyMetadata.ExposureTime.Hex = "829a";
MyMetadata.Fstop.Hex = "829d";
MyMetadata.ShutterSpeed.Hex = "9201";
MyMetadata.MeteringMode.Hex = "9207";
MyMetadata.Flash.Hex = "9209";
MyMetadata.FNumber.Hex = "829d"; //
MyMetadata.ExposureProg.Hex = ""; //
MyMetadata.SpectralSense.Hex = "8824"; //
MyMetadata.ISOSpeed.Hex = "8827"; //
MyMetadata.OECF.Hex = "8828"; //
MyMetadata.Ver.Hex = "9000"; //
MyMetadata.CompConfig.Hex = "9101"; //
MyMetadata.CompBPP.Hex = "9102"; //
MyMetadata.Aperture.Hex = "9202"; //
MyMetadata.Brightness.Hex = "9203"; //
MyMetadata.ExposureBias.Hex = "9204"; //
MyMetadata.MaxAperture.Hex = "9205"; //
MyMetadata.SubjectDist.Hex = "9206"; //
MyMetadata.LightSource.Hex = "9208"; //
MyMetadata.FocalLength.Hex = "920a"; //
MyMetadata.FPXVer.Hex = "a000"; //
MyMetadata.ColorSpace.Hex = "a001"; //
MyMetadata.FocalXRes.Hex = "a20e"; //
MyMetadata.FocalYRes.Hex = "a20f"; //
MyMetadata.FocalResUnit.Hex = "a210"; //
MyMetadata.ExposureIndex.Hex = "a215"; //
MyMetadata.SensingMethod.Hex = "a217"; //
MyMetadata.SceneType.Hex = "a301";
MyMetadata.CfaPattern.Hex = "a302";
// ASCII编码
System.Text.ASCIIEncoding Value = new System.Text.ASCIIEncoding();
int index = 0;
int MyPropertyIdListCount = MyPropertyIdList.Length;
if (MyPropertyIdListCount != 0) {
foreach (int MyPropertyId in MyPropertyIdList) {
string hexVal = "";
MyPropertyItemList[index] = MyImage.GetPropertyItem(MyPropertyId);
//初始化各属性值#region 初始化各属性值
string myPropertyIdString = MyImage.GetPropertyItem(MyPropertyId).Id.ToString("x");
switch (myPropertyIdString) {
case "10f": {
MyMetadata.EquipmentMake.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.EquipmentMake.DisplayValue = Value.GetString(MyPropertyItemList[index].Value);
break;
}
case "110": {
MyMetadata.CameraModel.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.CameraModel.DisplayValue = Value.GetString(MyPropertyItemList[index].Value);
break;
}
case "9003": {
MyMetadata.DatePictureTaken.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.DatePictureTaken.DisplayValue = Value.GetString(MyPropertyItemList[index].Value);
break;
}
case "9207": {
MyMetadata.MeteringMode.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.MeteringMode.DisplayValue = LookupEXIFValue("MeteringMode", BitConverter.ToInt16(MyImage.GetPropertyItem(MyPropertyId).Value, 0).ToString());
break;
}
case "9209": {
MyMetadata.Flash.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.Flash.DisplayValue = LookupEXIFValue("Flash", BitConverter.ToInt16(MyImage.GetPropertyItem(MyPropertyId).Value, 0).ToString());
break;
}
case "829a": {
MyMetadata.ExposureTime.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
string StringValue = "";
for (int Offset = 0; Offset < MyImage.GetPropertyItem(MyPropertyId).Len; Offset = Offset + 4) {
StringValue += BitConverter.ToInt32(MyImage.GetPropertyItem(MyPropertyId).Value, Offset).ToString() + "/";
}
MyMetadata.ExposureTime.DisplayValue = StringValue.Substring(0, StringValue.Length - 1);
break;
}
case "829d": {
MyMetadata.Fstop.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
int int1;
int int2;
int1 = BitConverter.ToInt32(MyImage.GetPropertyItem(MyPropertyId).Value, 0);
int2 = BitConverter.ToInt32(MyImage.GetPropertyItem(MyPropertyId).Value, 4);
MyMetadata.Fstop.DisplayValue = "F/" + (int1 / int2);
MyMetadata.FNumber.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.FNumber.DisplayValue = BitConverter.ToInt16(MyImage.GetPropertyItem(MyPropertyId).Value, 0).ToString();
break;
}
case "9201": {
MyMetadata.ShutterSpeed.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
string StringValue = BitConverter.ToInt32(MyImage.GetPropertyItem(MyPropertyId).Value, 0).ToString();
MyMetadata.ShutterSpeed.DisplayValue = "1/" + StringValue;
break;
}
case "8822": {
MyMetadata.ExposureProg.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.ExposureProg.DisplayValue = LookupEXIFValue("ExposureProg", BitConverter.ToInt16(MyImage.GetPropertyItem(MyPropertyId).Value, 0).ToString());
break;
}
case "8824": {
MyMetadata.SpectralSense.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.SpectralSense.DisplayValue = Value.GetString(MyPropertyItemList[index].Value);
break;
}
case "8827": {
hexVal = "";
MyMetadata.ISOSpeed.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
hexVal = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value).Substring(0, 2);
MyMetadata.ISOSpeed.DisplayValue = Convert.ToInt32(hexVal, 16).ToString();//Value.GetString(MyPropertyItemList[index].Value);
break;
}
case "8828": {
MyMetadata.OECF.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.OECF.DisplayValue = Value.GetString(MyPropertyItemList[index].Value);
break;
}
case "9000": {
MyMetadata.Ver.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.Ver.DisplayValue = Value.GetString(MyPropertyItemList[index].Value).Substring(1, 1) + "." + Value.GetString(MyPropertyItemList[index].Value).Substring(2, 2);
break;
}
case "9101": {
MyMetadata.CompConfig.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.CompConfig.DisplayValue = LookupEXIFValue("CompConfig", BitConverter.ToInt16(MyImage.GetPropertyItem(MyPropertyId).Value, 0).ToString());
break;
}
case "9102": {
MyMetadata.CompBPP.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.CompBPP.DisplayValue = BitConverter.ToInt16(MyImage.GetPropertyItem(MyPropertyId).Value, 0).ToString();
break;
}
case "9202": {
hexVal = "";
MyMetadata.Aperture.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
hexVal = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value).Substring(0, 2);
hexVal = Convert.ToInt32(hexVal, 16).ToString();
hexVal = hexVal + "00";
MyMetadata.Aperture.DisplayValue = hexVal.Substring(0, 1) + "." + hexVal.Substring(1, 2);
break;
}
case "9203": {
hexVal = "";
MyMetadata.Brightness.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
hexVal = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value).Substring(0, 2);
hexVal = Convert.ToInt32(hexVal, 16).ToString();
hexVal = hexVal + "00";
MyMetadata.Brightness.DisplayValue = hexVal.Substring(0, 1) + "." + hexVal.Substring(1, 2);
break;
}
case "9204": {
MyMetadata.ExposureBias.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.ExposureBias.DisplayValue = BitConverter.ToInt16(MyImage.GetPropertyItem(MyPropertyId).Value, 0).ToString();
break;
}
case "9205": {
hexVal = "";
MyMetadata.MaxAperture.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
hexVal = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value).Substring(0, 2);
hexVal = Convert.ToInt32(hexVal, 16).ToString();
hexVal = hexVal + "00";
MyMetadata.MaxAperture.DisplayValue = hexVal.Substring(0, 1) + "." + hexVal.Substring(1, 2);
break;
}
case "9206": {
MyMetadata.SubjectDist.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.SubjectDist.DisplayValue = Value.GetString(MyPropertyItemList[index].Value);
break;
}
case "9208": {
MyMetadata.LightSource.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.LightSource.DisplayValue = LookupEXIFValue("LightSource", BitConverter.ToInt16(MyImage.GetPropertyItem(MyPropertyId).Value, 0).ToString());
break;
}
case "920a": {
hexVal = "";
MyMetadata.FocalLength.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
hexVal = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value).Substring(0, 2);
hexVal = Convert.ToInt32(hexVal, 16).ToString();
hexVal = hexVal + "00";
MyMetadata.FocalLength.DisplayValue = hexVal.Substring(0, 1) + "." + hexVal.Substring(1, 2);
break;
}
case "a000": {
MyMetadata.FPXVer.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.FPXVer.DisplayValue = Value.GetString(MyPropertyItemList[index].Value).Substring(1, 1) + "." + Value.GetString(MyPropertyItemList[index].Value).Substring(2, 2);
break;
}
case "a001": {
MyMetadata.ColorSpace.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
if (BitConverter.ToInt16(MyImage.GetPropertyItem(MyPropertyId).Value, 0).ToString() == "1")
MyMetadata.ColorSpace.DisplayValue = "RGB";
if (BitConverter.ToInt16(MyImage.GetPropertyItem(MyPropertyId).Value, 0).ToString() == "65535")
MyMetadata.ColorSpace.DisplayValue = "Uncalibrated";
break;
}
case "a20e": {
MyMetadata.FocalXRes.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.FocalXRes.DisplayValue = BitConverter.ToInt16(MyImage.GetPropertyItem(MyPropertyId).Value, 0).ToString();
break;
}
case "a20f": {
MyMetadata.FocalYRes.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.FocalYRes.DisplayValue = BitConverter.ToInt16(MyImage.GetPropertyItem(MyPropertyId).Value, 0).ToString();
break;
}
case "a210": {
string aa;
MyMetadata.FocalResUnit.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
aa = BitConverter.ToInt16(MyImage.GetPropertyItem(MyPropertyId).Value, 0).ToString(); ;
if (aa == "1") MyMetadata.FocalResUnit.DisplayValue = "没有单位";
if (aa == "2") MyMetadata.FocalResUnit.DisplayValue = "英尺";
if (aa == "3") MyMetadata.FocalResUnit.DisplayValue = "厘米";
break;
}
case "a215": {
MyMetadata.ExposureIndex.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.ExposureIndex.DisplayValue = Value.GetString(MyPropertyItemList[index].Value);
break;
}
case "a217": {
string aa;
aa = BitConverter.ToInt16(MyImage.GetPropertyItem(MyPropertyId).Value, 0).ToString();
MyMetadata.SensingMethod.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
if (aa == "2") MyMetadata.SensingMethod.DisplayValue = "1 chip color area sensor";
break;
}
case "a301": {
MyMetadata.SceneType.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.SceneType.DisplayValue = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
break;
}
case "a302": {
MyMetadata.CfaPattern.RawValueAsString = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.CfaPattern.DisplayValue = BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
break;
}
}
index++;
}
}
MyMetadata.XResolution.DisplayValue = MyImage.HorizontalResolution.ToString();
MyMetadata.YResolution.DisplayValue = MyImage.VerticalResolution.ToString();
MyMetadata.ImageHeight.DisplayValue = MyImage.Height.ToString();
MyMetadata.ImageWidth.DisplayValue = MyImage.Width.ToString();
MyImage.Dispose();
return MyMetadata;
}
///<summary>Transformes value of the PropertyItem.Value byte array to apropriate .NET Framework type.</summary>
/// <param name="aPropertyItem"></param>
public static Object getValue(PropertyItem aPropertyItem)
{
if (aPropertyItem==null) return null;
switch ((PropertyTagType)aPropertyItem.Type) {
case PropertyTagType.Byte:
if (aPropertyItem.Value.Length == 1) return aPropertyItem.Value[0];
return aPropertyItem.Value;
case PropertyTagType.ASCII:
return _encoding.GetString( aPropertyItem.Value, 0, aPropertyItem.Len - 1);
case PropertyTagType.Short:
ushort[] _resultUShort = new ushort[aPropertyItem.Len / (16 / 8) ];
for (int i=0; i<_resultUShort.Length ; i++)
_resultUShort[i]=BitConverter.ToUInt16(aPropertyItem.Value,i*(16 / 8));
if (_resultUShort.Length==1) return _resultUShort[0];
return (_resultUShort);
case PropertyTagType.Long :
uint [] _resultUInt32 = new uint[aPropertyItem.Len / (32 / 8)];
for (int i=0; i<_resultUInt32.Length; i++)
_resultUInt32[i]= BitConverter.ToUInt32(aPropertyItem.Value, i*(32 / 8));
if (_resultUInt32.Length==1) return _resultUInt32[0];
return _resultUInt32;
case PropertyTagType.Rational :
Fraction[] _resultRational = new Fraction[aPropertyItem.Len / (64 / 8)];
uint uNominator;
uint uDenominator;
for (int i=0; i<_resultRational.Length; i++)
{
uNominator=1;
uNominator = BitConverter.ToUInt32(aPropertyItem.Value, i*(64 / 8) );
uDenominator = BitConverter.ToUInt32(aPropertyItem.Value, (i*(64 / 8)) + (32/8));
_resultRational[i]= new Fraction(uNominator, uDenominator);
if (_resultRational[i]==null) MessageBox.Show("Null");
}
if (_resultRational.Length==1) return _resultRational[0];
return _resultRational;
case PropertyTagType.Undefined:
if (aPropertyItem.Value.Length == 1) return aPropertyItem.Value[0];
return aPropertyItem.Value;
case PropertyTagType.SLONG:
int [] _resultInt32 = new int[aPropertyItem.Len / (32 / 8)];
for (int i=0; i<_resultInt32.Length; i++)
_resultInt32[i]= BitConverter.ToInt32(aPropertyItem.Value, i*(32/8));
if (_resultInt32.Length==1) return _resultInt32[0];
return _resultInt32;
case PropertyTagType.SRational:
Fraction[] _resultSRational = new Fraction[aPropertyItem.Len / (64 / 8)];
int sNominator;
int sDenominator;
for (int i=0; i<_resultSRational.Length; i++)
{
sNominator = BitConverter.ToInt32(aPropertyItem.Value, i*(64/8));
sDenominator = BitConverter.ToInt32(aPropertyItem.Value, i*(64/8)+(32/8));
_resultSRational[i]= new Fraction(sNominator, sDenominator);
}
if (_resultSRational.Length==1) return _resultSRational[0];
return _resultSRational;
default:
if (aPropertyItem.Value.Length == 1) return aPropertyItem.Value[0];
return aPropertyItem.Value;
}
}
///<summary></summary>
/// <param name="aPropertyItem"></param>
public PropertyTag(PropertyItem aPropertyItem)
{
_prop=aPropertyItem;
}
public static PropertyItem2 FromPropertyItem(PropertyItem pi)
{
return new PropertyItem2(pi.Id, pi.Len, pi.Type, pi.Value);
}
internal bool <LoadProperties> b__5_0(System.Drawing.Imaging.PropertyItem _) => true;
private static ImageProperty[] GetAllPropertiesInternal(IImageDecoder decoder)
{
uint num;
uint num2;
if (decoder == null)
{
throw new ArgumentNullException();
}
List<ImageProperty> list = new List<ImageProperty>(ImageUtils.GetAllTags(decoder).Length);
decoder.GetPropertySize(out num, out num2);
// Если драйвер возвращает заведомо мало информации, то значит она битая и вытащить
// оттуда всё равно ничего не вытащить. Число 30 взято исходя из опытных расчётов.
// Выходим из процедуры, иначе вывалится ошибка COM.
if (num < num2 * 30)
return list.ToArray();
IntPtr pItems = Marshal.AllocHGlobal((int)num);
PropertyItem[] itemArray = new PropertyItem[num2];
decoder.GetAllPropertyItems(num, num2, pItems);
IntPtr ptr = pItems;
for (uint i = 0; i < num2; i++)
{
itemArray[i] = (PropertyItem)Marshal.PtrToStructure(ptr, typeof(PropertyItem));
ptr = (IntPtr)(ptr.ToInt32() + Marshal.SizeOf(typeof(PropertyItem)));
}
foreach (PropertyItem item in itemArray)
{
list.Add(ImageUtils.LoadProperty(item));
}
Marshal.FreeHGlobal(pItems);
return list.ToArray();
}
