/// <summary>
/// Retrieves an array of configured codecs, both built-in and registered by user.
/// </summary>
/// <returns>An array of configured codecs.</returns>
public TiffCodec[] GetConfiguredCodecs()
{
int totalCodecs = 0;
for (int i = 0; m_builtInCodecs[i] != null; i++)
{
if (m_builtInCodecs[i] != null && IsCodecConfigured(m_builtInCodecs[i].m_scheme))
totalCodecs++;
}
for (codecList cd = m_registeredCodecs; cd != null; cd = cd.next)
totalCodecs++;
TiffCodec[] codecs = new TiffCodec[totalCodecs];
int codecPos = 0;
for (codecList cd = m_registeredCodecs; cd != null; cd = cd.next)
codecs[codecPos++] = cd.codec;
for (int i = 0; m_builtInCodecs[i] != null; i++)
{
if (m_builtInCodecs[i] != null && IsCodecConfigured(m_builtInCodecs[i].m_scheme))
codecs[codecPos++] = m_builtInCodecs[i];
}
return codecs;
}
/// <summary>
/// Adds specified codec to a list of registered codec.
/// </summary>
/// <param name="codec">The codec to register.</param>
/// <remarks>
/// This method can be used to augment or override the set of codecs available to an
/// application. If the <paramref name="codec"/> is for a scheme that already has a
/// registered codec then it is overridden and any images with data encoded with this
/// compression scheme will be decoded using the supplied codec.
/// </remarks>
public void RegisterCodec(TiffCodec codec)
{
if (codec == null)
throw new ArgumentNullException("codec");
codecList list = new codecList();
list.codec = codec;
list.next = m_registeredCodecs;
m_registeredCodecs = list;
}
/// <summary>
/// Removes specified codec from a list of registered codecs.
/// </summary>
/// <param name="codec">The codec to remove from a list of registered codecs.</param>
public void UnRegisterCodec(TiffCodec codec)
{
if (m_registeredCodecs == null)
return;
codecList temp;
if (m_registeredCodecs.codec == codec)
{
temp = m_registeredCodecs.next;
m_registeredCodecs = temp;
return;
}
for (codecList list = m_registeredCodecs; list != null; list = list.next)
{
if (list.next != null)
{
if (list.next.codec == codec)
{
temp = list.next.next;
list.next = temp;
return;
}
}
}
ErrorExt(this, 0, "UnRegisterCodec",
"Cannot remove compression scheme {0}; not registered", codec.m_name);
}
internal bool setCompressionScheme(Compression scheme)
{
TiffCodec c = FindCodec(scheme);
if (c == null)
{
/*
* Don't treat an unknown compression scheme as an error.
* This permits applications to open files with data that
* the library does not have builtin support for, but which
* may still be meaningful.
*/
c = m_builtInCodecs[0];
}
m_decodestatus = c.CanDecode;
m_flags &= ~(TiffFlags.NoBitRev | TiffFlags.NoReadRaw);
m_currentCodec = c;
return c.Init();
}