// This code contains NVIDIA Confidential Information and is disclosed to you
// under a form of NVIDIA software license agreement provided separately to you.
//
// Notice
// NVIDIA Corporation and its licensors retain all intellectual property and
// proprietary rights in and to this software and related documentation and
// any modifications thereto. Any use, reproduction, disclosure, or
// distribution of this software and related documentation without an express
// license agreement from NVIDIA Corporation is strictly prohibited.
//
// ALL NVIDIA DESIGN SPECIFICATIONS, CODE ARE PROVIDED "AS IS.". NVIDIA MAKES
// NO WARRANTIES, EXPRESSED, IMPLIED, STATUTORY, OR OTHERWISE WITH RESPECT TO
// THE MATERIALS, AND EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF NONINFRINGEMENT,
// MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
//
// Information and code furnished is believed to be accurate and reliable.
// However, NVIDIA Corporation assumes no responsibility for the consequences of use of such
// information or for any infringement of patents or other rights of third parties that may
// result from its use. No license is granted by implication or otherwise under any patent
// or patent rights of NVIDIA Corporation. Details are subject to change without notice.
// This code supersedes and replaces all information previously supplied.
// NVIDIA Corporation products are not authorized for use as critical
// components in life support devices or systems without express written approval of
// NVIDIA Corporation.
//
// Copyright (c) 2016-2020 NVIDIA Corporation. All rights reserved.


#ifndef NVBLASTACTORSERIALIZATIONBLOCK_H
#define NVBLASTACTORSERIALIZATIONBLOCK_H


#include "NvBlastFixedBoolArray.h"


namespace Nv
{
namespace Blast
{

/**
Struct-enum which keeps track of the actor serialization format.
*/
struct ActorSerializationFormat
{
	enum Version
	{
		/** Initial version */
		Initial,

		//	New formats must come before Count.  They should be given descriptive names with more information in comments.

		/** The number of serialization formats. */
		Count,

		/** The current version.  This should always be Count-1 */
		Current = Count - 1
	};
};


/**
Data header at the beginning of a NvBlastActor serialization block

The block address may be cast to a valid ActorSerializationHeader pointer.

Serialization state is only valid if partition has been called since the last call to findIslands().
*/
struct ActorSerializationHeader
{
	/**
	A number which is incremented every time the data layout changes.
	*/
	uint32_t	m_formatVersion;

	/**
	The size of the serialization block, including this header.

	Memory sizes are restricted to 32-bit representable values.
	*/
	uint32_t	m_size;

	/**
	The index of the actor within its family.
	*/
	uint32_t	m_index;

	/**
	The number of elements in the visible chunk indices list.
	*/
	uint32_t	m_visibleChunkCount;

	/**
	The number of elements in the graph node indices list.
	*/
	uint32_t	m_graphNodeCount;

	/**
	The number of leaf chunks in this actor.
	*/
	uint32_t	m_leafChunkCount;

	/**
	Visible chunk indices, of type uint32_t.
	*/
	NvBlastBlockArrayData(uint32_t, m_visibleChunkIndicesOffset, getVisibleChunkIndices, m_visibleChunkCount);

	/**
	Graph node indices, of type uint32_t.
	*/
	NvBlastBlockArrayData(uint32_t, m_graphNodeIndicesOffset, getGraphNodeIndices, m_graphNodeCount);

	/**
	Healths for lower support chunks in this actor, in breadth-first order from the support chunks associated with the graph nodes.  Type float.
	*/
	NvBlastBlockData(float, m_lowerSupportChunkHealthsOffset, getLowerSupportChunkHealths);

	/**
	Healths for bonds associated with support chunks in this actor, in order of graph adjacency from associated graph nodes, i < j only.  Type float.
	*/
	NvBlastBlockData(float, m_bondHealthsOffset, getBondHealths);

	/**
	Fast route in instance graph calculated for each graph node in this actor, of type uint32_t.
	*/
	NvBlastBlockArrayData(uint32_t, m_fastRouteOffset, getFastRoute, m_graphNodeCount);

	/**
	Hop counts in instance graph calculated for each graph node in this actor, of type uint32_t.
	*/
	NvBlastBlockArrayData(uint32_t, m_hopCountsOffset, getHopCounts, m_graphNodeCount);

	/**
	"Edge removed" bits for bonds associated with support chunks in this actor, in order of graph adjacency from associated graph nodes, i < j only.  Type FixedBoolArray.
	*/
	NvBlastBlockData(FixedBoolArray, m_edgeRemovedArrayOffset, getEdgeRemovedArray);
};


//////// Global functions ////////

/**
A buffer size sufficient to serialize an actor with a given visible chunk count, lower support chunk count, graph node count, and bond count.

\param[in] visibleChunkCount		The number of visible chunks
\param[in] lowerSupportChunkCount	The number of lower-support chunks in the asset.
\param[in] graphNodeCount			The number of graph nodes in the asset.
\param[in] bondCount				The number of graph bonds in the asset.

\return the required buffer size in bytes.
*/
NV_INLINE size_t getActorSerializationSize(uint32_t visibleChunkCount, uint32_t lowerSupportChunkCount, uint32_t graphNodeCount, uint32_t bondCount)
{
	// Family offsets
	const size_t visibleChunkIndicesOffset = align16(sizeof(ActorSerializationHeader));								// size = visibleChunkCount*sizeof(uint32_t)
	const size_t graphNodeIndicesOffset = align16(visibleChunkIndicesOffset + visibleChunkCount*sizeof(uint32_t));	// size = graphNodeCount*sizeof(uint32_t)
	const size_t lowerSupportHealthsOffset = align16(graphNodeIndicesOffset + graphNodeCount*sizeof(uint32_t));		// size = lowerSupportChunkCount*sizeof(float)
	const size_t bondHealthsOffset = align16(lowerSupportHealthsOffset + lowerSupportChunkCount*sizeof(float));		// size = bondCount*sizeof(float)
	const size_t fastRouteOffset = align16(bondHealthsOffset + bondCount*sizeof(float));							// size = graphNodeCount*sizeof(uint32_t)
	const size_t hopCountsOffset = align16(fastRouteOffset + graphNodeCount*sizeof(uint32_t));						// size = graphNodeCount*sizeof(uint32_t)
	const size_t edgeRemovedArrayOffset = align16(hopCountsOffset + graphNodeCount*sizeof(uint32_t));				// size = 0 or FixedBoolArray::requiredMemorySize(bondCount)
	return align16(edgeRemovedArrayOffset + (bondCount == 0 ? 0 : FixedBoolArray::requiredMemorySize(bondCount)));
}

} // namespace Blast
} // namespace Nv


#endif // ifndef NVBLASTACTORSERIALIZATIONBLOCK_H