public void RunUpdate()
{
//This is where we decide what we need to update
//and assign the real discardLevel and packetNumber
//assuming of course that the connected client might be bonkers
if (!m_hasasset)
{
if (!m_asset_requested)
{
m_asset_requested = true;
m_assetCache.Get(m_requestedUUID.ToString(), this, AssetReceived);
}
}
else
{
if (!m_decoded)
{
//We need to decode the requested image first
if (!m_decoderequested)
{
//Request decode
m_decoderequested = true;
// Do we have a jpeg decoder?
if (m_j2kDecodeModule != null)
{
if (Data == null)
{
J2KDecodedCallback(m_requestedUUID, new OpenJPEG.J2KLayerInfo[0]);
}
// Send it off to the jpeg decoder
m_j2kDecodeModule.decode(m_requestedUUID, Data, J2KDecodedCallback);
}
else
{
J2KDecodedCallback(m_requestedUUID, new OpenJPEG.J2KLayerInfo[0]);
}
}
}
else
{
//discardLevel of -1 means just update the priority
if (m_requestedDiscardLevel != -1)
{
//Evaluate the discard level
//First, is it positive?
if (m_requestedDiscardLevel >= 0)
{
if (m_requestedDiscardLevel > Layers.Length - 1)
{
m_discardLevel = (sbyte)(Layers.Length - 1);
}
else
{
m_discardLevel = m_requestedDiscardLevel;
}
//Calculate the m_stopPacket
if (Layers.Length > 0)
{
m_stopPacket = (uint)GetPacketForBytePosition(Layers[(Layers.Length - 1) - m_discardLevel].End);
//I don't know why, but the viewer seems to expect the final packet if the file
//is just one packet bigger.
if (TexturePacketCount() == m_stopPacket + 1)
{
m_stopPacket = TexturePacketCount();
}
}
else
{
m_stopPacket = TexturePacketCount();
}
//Don't reset packet number unless we're waiting or it's ahead of us
if (m_completedSendAtCurrentDiscardLevel || m_requestedPacketNumber > m_packetNumber)
{
m_packetNumber = m_requestedPacketNumber;
}
if (m_packetNumber <= m_stopPacket)
{
m_completedSendAtCurrentDiscardLevel = false;
}
}
}
else
{
m_packetNumber = m_stopPacket;
}
}
}
}