assimp.assimp/code/AssbinLoader.cpp

/*
---------------------------------------------------------------------------
Open Asset Import Library (assimp)
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Copyright (c) 2006-2012, assimp team

All rights reserved.

Redistribution and use of this software in source and binary forms, 
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  following disclaimer.

* Redistributions in binary form must reproduce the above
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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*/

/** @file  AssbinLoader.cpp
 *  @brief Implementation of the .assbin importer class
 *
 *  see assbin_chunks.h
 */

#include "AssimpPCH.h"
#ifndef ASSIMP_BUILD_NO_ASSBIN_IMPORTER

// internal headers
#include "AssbinLoader.h"
#include "assbin_chunks.h"

using namespace Assimp;

static const aiImporterDesc desc = {
  ".assbin Importer",
  "Gargaj / Conspiracy",
  "",
  "",
  aiImporterFlags_SupportBinaryFlavour | aiImporterFlags_SupportCompressedFlavour,
  0,
  0,
  0,
  0,
  "assbin" 
};

const aiImporterDesc* AssbinImporter::GetInfo() const
{
  return &desc;
}

bool AssbinImporter::CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig ) const
{
  IOStream * in = pIOHandler->Open(pFile);
  if (!in)
    return false;

  char s[32];
  in->Read( s, sizeof(char), 32 );

  pIOHandler->Close(in);

  return strncmp( s, "ASSIMP.binary-dump.", 19 ) == 0;
}

template <typename T>
T Read(IOStream * stream)
{
  T t;
  stream->Read( &t, sizeof(T), 1 );
  return t;
}

template <>
aiString Read<aiString>(IOStream * stream)
{
  aiString s;
	stream->Read(&s.length,4,1);
  stream->Read(s.data,s.length,1);
  return s;
}

template <>
aiMatrix4x4 Read<aiMatrix4x4>(IOStream * stream)
{
  aiMatrix4x4 m;
	for (unsigned int i = 0; i < 4;++i) {
		for (unsigned int i2 = 0; i2 < 4;++i2) {
			m[i][i2] = Read<float>(stream);
		}
	}
	return m;
}

template <typename T> void ReadBounds( IOStream * stream, T* p, unsigned int n )
{
  // not sure what to do here, the data isn't really useful.
	stream->Seek( sizeof(T) * n, aiOrigin_CUR );
}

void AssbinImporter::ReadBinaryNode( IOStream * stream, aiNode** node )
{
	ai_assert( Read<uint32_t>(stream) == ASSBIN_CHUNK_AINODE);
  uint32_t size = Read<uint32_t>(stream);

  *node = new aiNode();

	(*node)->mName = Read<aiString>(stream);
	(*node)->mTransformation = Read<aiMatrix4x4>(stream);
	(*node)->mNumChildren = Read<unsigned int>(stream);
	(*node)->mNumMeshes = Read<unsigned int>(stream);

  if ((*node)->mNumMeshes)
  {
    (*node)->mMeshes = new unsigned int[(*node)->mNumMeshes];
	  for (unsigned int i = 0; i < (*node)->mNumMeshes; ++i) {
		  (*node)->mMeshes[i] = Read<unsigned int>(stream);
	  }
  }

  if ((*node)->mNumChildren)
  {
    (*node)->mChildren = new aiNode*[(*node)->mNumChildren];
	  for (unsigned int i = 0; i < (*node)->mNumChildren; ++i) {
		  ReadBinaryNode( stream, &(*node)->mChildren[i] );
	  }
  }

}

// -----------------------------------------------------------------------------------
void AssbinImporter::ReadBinaryBone( IOStream * stream, aiBone* b )
{
	ai_assert( Read<uint32_t>(stream) == ASSBIN_CHUNK_AIBONE );
  uint32_t size = Read<uint32_t>(stream);

	b->mName = Read<aiString>(stream);
	b->mNumWeights = Read<unsigned int>(stream);
	b->mOffsetMatrix = Read<aiMatrix4x4>(stream);

	// for the moment we write dumb min/max values for the bones, too.
	// maybe I'll add a better, hash-like solution later
	if (shortened) 
  {
		ReadBounds(stream,b->mWeights,b->mNumWeights);
	} // else write as usual
	else 
  {
    b->mWeights = new aiVertexWeight[b->mNumWeights];
    stream->Read(b->mWeights,1,b->mNumWeights*sizeof(aiVertexWeight));
  }
}


void AssbinImporter::ReadBinaryMesh( IOStream * stream, aiMesh* mesh )
{
	ai_assert( Read<uint32_t>(stream) == ASSBIN_CHUNK_AIMESH);
  uint32_t size = Read<uint32_t>(stream);

	mesh->mPrimitiveTypes = Read<unsigned int>(stream);
	mesh->mNumVertices = Read<unsigned int>(stream);
	mesh->mNumFaces = Read<unsigned int>(stream);
	mesh->mNumBones = Read<unsigned int>(stream);
	mesh->mMaterialIndex = Read<unsigned int>(stream);

	// first of all, write bits for all existent vertex components
	unsigned int c = Read<unsigned int>(stream);

	if (c & ASSBIN_MESH_HAS_POSITIONS) 
  {
		if (shortened) {
			ReadBounds(stream,mesh->mVertices,mesh->mNumVertices);
		} // else write as usual
		else 
    {
      mesh->mVertices = new aiVector3D[mesh->mNumVertices];
      stream->Read(mesh->mVertices,1,12*mesh->mNumVertices);
    }
	}
	if (c & ASSBIN_MESH_HAS_NORMALS) 
  {
		if (shortened) {
			ReadBounds(stream,mesh->mNormals,mesh->mNumVertices);
		} // else write as usual
		else 
    {
      mesh->mNormals = new aiVector3D[mesh->mNumVertices];
      stream->Read(mesh->mNormals,1,12*mesh->mNumVertices);
    }
	}
	if (c & ASSBIN_MESH_HAS_TANGENTS_AND_BITANGENTS) 
  {
		if (shortened) {
			ReadBounds(stream,mesh->mTangents,mesh->mNumVertices);
			ReadBounds(stream,mesh->mBitangents,mesh->mNumVertices);
		} // else write as usual
		else {
      mesh->mTangents = new aiVector3D[mesh->mNumVertices];
			stream->Read(mesh->mTangents,1,12*mesh->mNumVertices);
      mesh->mBitangents = new aiVector3D[mesh->mNumVertices];
			stream->Read(mesh->mBitangents,1,12*mesh->mNumVertices);
		}
	}
	for (unsigned int n = 0; n < AI_MAX_NUMBER_OF_COLOR_SETS;++n) 
  {
		if (!(c & ASSBIN_MESH_HAS_COLOR(n)))
			break;

		if (shortened) 
    {
			ReadBounds(stream,mesh->mColors[n],mesh->mNumVertices);
		} // else write as usual
		else 
    {
      mesh->mColors[n] = new aiColor4D[mesh->mNumVertices];
      stream->Read(mesh->mColors[n],16*mesh->mNumVertices,1);
    }
	}
	for (unsigned int n = 0; n < AI_MAX_NUMBER_OF_TEXTURECOORDS;++n) 
  {
		if (!(c & ASSBIN_MESH_HAS_TEXCOORD(n)))
			break;

		// write number of UV components
		mesh->mNumUVComponents[n] = Read<unsigned int>(stream);

		if (shortened) {
			ReadBounds(stream,mesh->mTextureCoords[n],mesh->mNumVertices);
		} // else write as usual
		else 
    {
      mesh->mTextureCoords[n] = new aiVector3D[mesh->mNumVertices];
      stream->Read(mesh->mTextureCoords[n],12*mesh->mNumVertices,1);
    }
	}

	// write faces. There are no floating-point calculations involved
	// in these, so we can write a simple hash over the face data
	// to the dump file. We generate a single 32 Bit hash for 512 faces
	// using Assimp's standard hashing function.
	if (shortened) {
		Read<unsigned int>(stream);
	}
	else // else write as usual
	{
		// if there are less than 2^16 vertices, we can simply use 16 bit integers ...
    mesh->mFaces = new aiFace[mesh->mNumFaces];
		for (unsigned int i = 0; i < mesh->mNumFaces;++i) {
			aiFace& f = mesh->mFaces[i];

			BOOST_STATIC_ASSERT(AI_MAX_FACE_INDICES <= 0xffff);
			f.mNumIndices = Read<uint16_t>(stream);
      f.mIndices = new unsigned int[f.mNumIndices];

			for (unsigned int a = 0; a < f.mNumIndices;++a) {
				if (mesh->mNumVertices < (1u<<16)) 
        {
					f.mIndices[a] = Read<uint16_t>(stream);
				}
				else 
        {
          f.mIndices[a] = Read<unsigned int>(stream);
        }
			}
		}
	}

	// write bones
	if (mesh->mNumBones) {
    mesh->mBones = new C_STRUCT aiBone*[mesh->mNumBones];
		for (unsigned int a = 0; a < mesh->mNumBones;++a) {
			mesh->mBones[a] = new aiBone();
			ReadBinaryBone(stream,mesh->mBones[a]);
		}
	}
}

void AssbinImporter::ReadBinaryScene( IOStream * stream, aiScene* scene )
{
	ai_assert( Read<uint32_t>(stream) == ASSBIN_CHUNK_AISCENE);
  uint32_t size = Read<uint32_t>(stream);

	scene->mFlags         = Read<unsigned int>(stream);
	scene->mNumMeshes     = Read<unsigned int>(stream);
	scene->mNumMaterials  = Read<unsigned int>(stream);
	scene->mNumAnimations = Read<unsigned int>(stream);
	scene->mNumTextures   = Read<unsigned int>(stream);
	scene->mNumLights     = Read<unsigned int>(stream);
	scene->mNumCameras    = Read<unsigned int>(stream);

	// Read node graph
  scene->mRootNode = new aiNode[1];
	ReadBinaryNode( stream, &scene->mRootNode );

	// Read all meshes
  if (scene->mNumMeshes)
  {
    scene->mMeshes = new aiMesh*[scene->mNumMeshes];
	  for (unsigned int i = 0; i < scene->mNumMeshes;++i) {
		  scene->mMeshes[i] = new aiMesh();
		  ReadBinaryMesh( stream,scene->mMeshes[i]);
	  }
  }

/*
	// Read materials
	for (unsigned int i = 0; i< scene->mNumMaterials; ++i) {
		const aiMaterial* mat = scene->mMaterials[i];
		ReadBinaryMaterial(stream,mat);
	}

	// Read all animations
	for (unsigned int i = 0; i < scene->mNumAnimations;++i) {
		const aiAnimation* anim = scene->mAnimations[i];
		ReadBinaryAnim(stream,anim);
	}


	// Read all textures
	for (unsigned int i = 0; i < scene->mNumTextures;++i) {
		const aiTexture* mesh = scene->mTextures[i];
		ReadBinaryTexture(stream,mesh);
	}

	// Read lights
	for (unsigned int i = 0; i < scene->mNumLights;++i) {
		const aiLight* l = scene->mLights[i];
		ReadBinaryLight(stream,l);
	}

	// Read cameras
	for (unsigned int i = 0; i < scene->mNumCameras;++i) {
		const aiCamera* cam = scene->mCameras[i];
		ReadBinaryCamera(stream,cam);
	}
*/

}

void AssbinImporter::InternReadFile( const std::string& pFile, aiScene* pScene, IOSystem* pIOHandler )
{
	IOStream * stream = pIOHandler->Open(pFile,"rb");
	if (!stream)
    return;

  stream->Seek( 44, aiOrigin_CUR ); // signature

	unsigned int versionMajor = Read<unsigned int>(stream);
	unsigned int versionMinor = Read<unsigned int>(stream);
	unsigned int versionRevision = Read<unsigned int>(stream);
	unsigned int compileFlags = Read<unsigned int>(stream);

	shortened = Read<uint16_t>(stream) > 0;
	compressed = Read<uint16_t>(stream) > 0;

  stream->Seek( 256, aiOrigin_CUR ); // original filename
  stream->Seek( 128, aiOrigin_CUR ); // options
  stream->Seek( 64, aiOrigin_CUR ); // padding

  if (compressed)
  {
    // TODO
  }
  else
  {
    ReadBinaryScene(stream,pScene);
  }
  
  pIOHandler->Close(stream);
}

#endif // !! ASSIMP_BUILD_NO_ASSBIN_IMPORTER