/// <summary>
/// Determine and updates <see cref="CurrentState"/> from <see cref="State"/>.
/// </summary>
public void Update()
{
// Hash current state
var hashedState = new PipelineStateDescriptionWithHash(State);
// Find existing PipelineState object
PipelineState pipelineState;
// TODO GRAPHICS REFACTOR We could avoid lock by adding them to a ThreadLocal (or RenderContext) and merge at end of frame
lock (cache)
{
if (!cache.TryGetValue(hashedState, out pipelineState))
{
// Otherwise, instantiate it
// First, make an copy
hashedState = new PipelineStateDescriptionWithHash(State.Clone());
cache.Add(hashedState, pipelineState = PipelineState.New(graphicsDevice, ref State));
}
}
CurrentState = pipelineState;
}
public static PipelineState New(GraphicsDevice graphicsDevice, ref PipelineStateDescription pipelineStateDescription)
{
// Hash the current state
var hashedState = new PipelineStateDescriptionWithHash(pipelineStateDescription);
// Store SamplerState in a cache (D3D seems to have quite bad concurrency when using CreateSampler while rendering)
PipelineState pipelineState;
lock (graphicsDevice.CachedPipelineStates)
{
if (graphicsDevice.CachedPipelineStates.TryGetValue(hashedState, out pipelineState))
{
// TODO: Appropriate destroy
pipelineState.AddReferenceInternal();
}
else
{
pipelineState = new PipelineState(graphicsDevice, pipelineStateDescription);
graphicsDevice.CachedPipelineStates.Add(hashedState, pipelineState);
}
}
return(pipelineState);
}