private static int GetRepeatCount(BitmapDecoder decoder)
{
BitmapMetadata applicationExtension = ImageBehavior.GetApplicationExtension(decoder, "NETSCAPE2.0");
if (applicationExtension != null)
{
byte[] queryOrNull = applicationExtension.GetQueryOrNull <byte[]>("/Data");
if (queryOrNull != null && queryOrNull.Length >= 4)
{
return((int)BitConverter.ToUInt16(queryOrNull, 2));
}
}
return(1);
}
private static BitmapMetadata GetApplicationExtension(BitmapDecoder decoder, string application)
{
int num = 0;
string query = "/appext";
for (BitmapMetadata metadata = decoder.Metadata.GetQueryOrNull <BitmapMetadata>(query); metadata != null; metadata = decoder.Metadata.GetQueryOrNull <BitmapMetadata>(query))
{
byte[] queryOrNull = metadata.GetQueryOrNull <byte[]>("/Application");
if ((queryOrNull != null) && (Encoding.ASCII.GetString(queryOrNull) == application))
{
return(metadata);
}
query = $"/[{++num}]appext";
}
return(null);
}
private static BitmapMetadata GetApplicationExtension(
BitmapDecoder decoder,
string application)
{
int num = 0;
string query1 = "/appext";
string query2;
for (BitmapMetadata queryOrNull1 = decoder.Metadata.GetQueryOrNull <BitmapMetadata>(query1); queryOrNull1 != null; queryOrNull1 = decoder.Metadata.GetQueryOrNull <BitmapMetadata>(query2))
{
byte[] queryOrNull2 = queryOrNull1.GetQueryOrNull <byte[]>("/Application");
if (queryOrNull2 != null && Encoding.ASCII.GetString(queryOrNull2) == application)
{
return(queryOrNull1);
}
query2 = string.Format((IFormatProvider)CultureInfo.InvariantCulture, "/[{0}]appext", (object)++num);
}
return((BitmapMetadata)null);
}
private static BitmapMetadata GetApplicationExtension(BitmapDecoder decoder, string application)
{
int count = 0;
string query = "/appext";
BitmapMetadata extension = decoder.Metadata.GetQueryOrNull <BitmapMetadata>(query);
while (extension != null)
{
byte[] bytes = extension.GetQueryOrNull <byte[]>("/Application");
if (bytes != null)
{
string extApplication = Encoding.ASCII.GetString(bytes);
if (extApplication == application)
{
return(extension);
}
}
query = string.Format("/[{0}]appext", ++count);
extension = decoder.Metadata.GetQueryOrNull <BitmapMetadata>(query);
}
return(null);
}
