// Dequeue a job
public DequedJob dequeue()
{
Debug.Assert(Monitor.IsEntered(syncRoot));
var e = pending.GetEnumerator();
if (e.MoveNext())
{
Meshes res = e.Current;
e.Dispose();
pending.Remove(res);
res.state = eState.Running;
return(new DequedJob(res));
}
e.Dispose();
return(new DequedJob());
}
iTessellatedMeshes postJob(iPathGeometry path, int instance, ref Matrix3x2 tform, eBuildFilledMesh filled, float pixel, sStrokeInfo?stroke)
{
if (null == path)
{
throw new ArgumentNullException();
}
// We use MD4 to detect changes in re-tessellated polylines. To make that more efficient for small changes of scaling, rounding the precision and pixel values.
float precision = pixel.floorBitwise();
Options options = new Options(ref tform, precision, pixel, filled, stroke, false);
Meshes meshes;
Table table;
if (0 == instance)
{
table = zeroInstances;
}
else if (1 == instance)
{
table = oneInstances;
}
else
{
var dict = multiTable.GetOrCreateValue(path);
if (dict.TryGetValue(instance, out meshes))
{
return(updateOldJob(meshes, ref options));
}
meshes = new Meshes(path, factory);
dict.Add(instance, meshes);
return(createNewJob(meshes, ref options));
}
if (table.TryGetValue(path, out meshes))
{
return(updateOldJob(meshes, ref options));
}
meshes = new Meshes(path, factory);
table.Add(path, meshes);
return(createNewJob(meshes, ref options));
}
iTessellatedMeshes createNewJob(Meshes meshes, ref Options options)
{
Debug.Assert(!options.separateStrokeMesh);
meshes.options = options;
lock (queues.syncRoot)
{
queues.enqueue(meshes);
if (threadsRunning >= countThreads)
{
return(meshes);
}
threadsRunning++;
}
ThreadPool.QueueUserWorkItem(postJobCallback);
return(meshes);
}
iTessellatedMeshes updateOldJob(Meshes meshes, ref Options options)
{
Debug.Assert(!options.separateStrokeMesh);
lock (queues.syncRoot)
{
Options prevOptions = meshes.options;
if (prevOptions.isGoodEnough(ref options) && meshes.hasPolylines)
{
return(meshes);
}
meshes.options = options;
queues.enqueue(meshes);
if (threadsRunning >= countThreads)
{
return(meshes);
}
threadsRunning++;
}
ThreadPool.QueueUserWorkItem(postJobCallback);
return(meshes);
}
public ExtraStrokeMesh(Meshes owner, iVrmacDraw factory)
{
this.owner = owner;
frontBuffer = factory.createTriangleMesh();
backBuffer = factory.createTriangleMesh();
}
public DequedJob(Meshes meshes)
{
this.meshes = meshes;
options = meshes.options;
hash = meshes.hashFront;
}
