/// <summary>
/// Generates the DrawNode for ourselves.
/// </summary>
/// <returns>A complete and updated DrawNode, or null if the DrawNode would be invisible.</returns>
protected internal virtual DrawNode GenerateDrawNodeSubtree(int treeIndex, RectangleF bounds)
{
// If we are proxied somewhere, then we want to be drawn at the proxy's location
// in the scene graph, rather than at our own location, thus no draw nodes for us.
if (proxy != null)
{
return(null);
}
DrawNode node = drawNodes[treeIndex];
if (node == null)
{
drawNodes[treeIndex] = node = CreateDrawNode();
FrameStatistics.Increment(StatisticsCounterType.DrawNodeCtor);
}
if (invalidationID != node.InvalidationID)
{
ApplyDrawNode(node);
FrameStatistics.Increment(StatisticsCounterType.DrawNodeAppl);
}
return(node);
}
public BufferedDrawNode(IBufferedDrawable source, DrawNode child, BufferedDrawNodeSharedData sharedData, RenderbufferInternalFormat[] formats = null, bool pixelSnapping = false)
: base(source)
{
this.formats = formats;
Child = child;
SharedData = sharedData;
filteringMode = pixelSnapping ? All.Nearest : All.Linear;
}
internal DrawNode GenerateDrawNodeSubtree()
{
DrawNode node = BaseDrawNode;
foreach (Drawable child in children.Current)
{
if (child.IsVisible)
{
node.Children.Add(child.GenerateDrawNodeSubtree());
}
}
return(node);
}
/// <summary>
/// Generates the DrawNode for ourselves.
/// </summary>
/// <returns>A complete and updated DrawNode, or null if the DrawNode would be invisible.</returns>
protected internal virtual DrawNode GenerateDrawNodeSubtree(int treeIndex, RectangleF bounds)
{
DrawNode node = drawNodes[treeIndex];
if (node == null)
{
drawNodes[treeIndex] = node = CreateDrawNode();
FrameStatistics.Increment(StatisticsCounterType.DrawNodeCtor);
}
if (invalidationID != node.InvalidationID)
{
ApplyDrawNode(node);
FrameStatistics.Increment(StatisticsCounterType.DrawNodeAppl);
}
return(node);
}
/// <summary>
/// Generates the DrawNode for ourselves.
/// </summary>
/// <param name="node">An existing DrawNode which may need to be updated, or null if a node needs to be created.</param>
/// <returns>A complete and updated DrawNode.</returns>
internal virtual DrawNode GenerateDrawNodeSubtree(DrawNode node = null)
{
if (node == null)
{
//we don't have a previous node, so we need to initialise fresh.
node = CreateDrawNode();
node.Drawable = this;
}
if (!node.IsValid)
{
//we need to update the node if it has been invalidated.
ApplyDrawNode(node);
node.IsValid = true;
validDrawNodes.Add(node);
}
return(node);
}
protected virtual void ApplyDrawNode(DrawNode node)
{
node.DrawInfo = DrawInfo;
node.InvalidationID = invalidationID;
}
public BufferedDrawNode(IBufferedDrawable source, DrawNode child, BufferedDrawNodeSharedData sharedData)
: base(source)
{
Child = child;
SharedData = sharedData;
}
protected virtual void ApplyDrawNode(DrawNode node)
{
node.DrawInfo = DrawInfo;
node.Drawable = this;
}