/src/assimp/code/AssetLib/Assbin/AssbinLoader.cpp

Source
/*
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  following disclaimer.

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*/

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

#ifndef ASSIMP_BUILD_NO_ASSBIN_IMPORTER

// internal headers
#include "AssbinLoader.h"
#include "Common/assbin_chunks.h"
#include <assimp/MemoryIOWrapper.h>
#include <assimp/anim.h>
#include <assimp/importerdesc.h>
#include <assimp/mesh.h>
#include <assimp/scene.h>

#include <climits>
#include <cstdint>
#include <memory>
#include <vector>

#ifdef ASSIMP_BUILD_NO_OWN_ZLIB
#include <zlib.h>
#else
#include <contrib/zlib/zlib.h>
#endif

using namespace Assimp;

static constexpr aiImporterDesc desc = {
    "Assimp Binary 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 {
    if (pIOHandler == nullptr) {
        return false;
    }

    IOStream *in = pIOHandler->Open(pFile);
    if (nullptr == in) {
        return false;
    }

    char s[32];
    const size_t read = in->Read(s, sizeof(char), 32);

    pIOHandler->Close(in);

    if (read < 19) {
      return false;
    }

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

// -----------------------------------------------------------------------------------
template <typename T>
T Read(IOStream *stream) {
    T t;
    size_t res = stream->Read(&t, sizeof(T), 1);
    if (res != 1) {
        throw DeadlyImportError("Unexpected EOF");
    }
    return t;
}

// -----------------------------------------------------------------------------------
void ReadBytes(IOStream *stream, void *out, size_t size, const char *what) {
    if (stream == nullptr) {
        throw DeadlyImportError("ASSBIN: Invalid stream");
    }

    if (size == 0) {
        return;
    }

    const size_t res = stream->Read(out, 1, size);
    if (res != size) {
        throw DeadlyImportError("ASSBIN: Unexpected EOF reading ", what);
    }
}

// -----------------------------------------------------------------------------------
template <>
aiVector3D Read<aiVector3D>(IOStream *stream) {
    aiVector3D v;
    v.x = Read<ai_real>(stream);
    v.y = Read<ai_real>(stream);
    v.z = Read<ai_real>(stream);
    return v;
}

// -----------------------------------------------------------------------------------
template <>
aiColor4D Read<aiColor4D>(IOStream *stream) {
    aiColor4D c;
    c.r = Read<ai_real>(stream);
    c.g = Read<ai_real>(stream);
    c.b = Read<ai_real>(stream);
    c.a = Read<ai_real>(stream);
    return c;
}

// -----------------------------------------------------------------------------------
template <>
aiQuaternion Read<aiQuaternion>(IOStream *stream) {
    aiQuaternion v;
    v.w = Read<ai_real>(stream);
    v.x = Read<ai_real>(stream);
    v.y = Read<ai_real>(stream);
    v.z = Read<ai_real>(stream);
    return v;
}

// -----------------------------------------------------------------------------------
template <>
aiString Read<aiString>(IOStream *stream) {
    aiString s;
    const ai_uint32 len = Read<ai_uint32>(stream);
    if (len >= AI_MAXLEN) {
        throw DeadlyImportError("ASSBIN: String length too large, potential buffer overflow attempt");
    }
    s.length = len;
    if (s.length > 0) {
        ReadBytes(stream, s.data, s.length, "string data");
    }
    s.data[s.length] = '\0';

    return s;
}

// -----------------------------------------------------------------------------------
template <>
aiVertexWeight Read<aiVertexWeight>(IOStream *stream) {
    aiVertexWeight w;
    w.mVertexId = Read<unsigned int>(stream);
    w.mWeight = Read<ai_real>(stream);
    return w;
}

// -----------------------------------------------------------------------------------
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<ai_real>(stream);
        }
    }
    return m;
}

// -----------------------------------------------------------------------------------
template <>
aiVectorKey Read<aiVectorKey>(IOStream *stream) {
    aiVectorKey v;
    v.mTime = Read<double>(stream);
    v.mValue = Read<aiVector3D>(stream);
    return v;
}

// -----------------------------------------------------------------------------------
template <>
aiQuatKey Read<aiQuatKey>(IOStream *stream) {
    aiQuatKey v;
    v.mTime = Read<double>(stream);
    v.mValue = Read<aiQuaternion>(stream);
    return v;
}

// -----------------------------------------------------------------------------------
template <typename T>
void ReadArray(IOStream *stream, T *out, unsigned int size) {
    ai_assert(nullptr != stream);
    ai_assert(nullptr != out);

    for (unsigned int i = 0; i < size; i++) {
        out[i] = Read<T>(stream);
    }
}

// -----------------------------------------------------------------------------------
template <typename T>
void ReadBounds(IOStream *stream, T * /*p*/, unsigned int n) {
    if (stream == nullptr) {
        throw DeadlyImportError("ASSBIN: Invalid stream");
    }
    stream->Seek(sizeof(T) * n, aiOrigin_CUR);
}

// -----------------------------------------------------------------------------------
void AssbinImporter::ReadBinaryNode(IOStream *stream, aiNode **onode, aiNode *parent) {
    if (stream == nullptr) {
        throw DeadlyImportError("ASSBIN: Invalid stream");
    }

    if (Read<uint32_t>(stream) != ASSBIN_CHUNK_AINODE) {
        throw DeadlyImportError("Magic chunk identifiers are wrong!");
    }
    /*uint32_t size =*/Read<uint32_t>(stream);

    auto node = std::make_unique<aiNode>();

    node->mName = Read<aiString>(stream);
    node->mTransformation = Read<aiMatrix4x4>(stream);
    unsigned numChildren = Read<unsigned int>(stream);
    unsigned numMeshes = Read<unsigned int>(stream);
    unsigned int nb_metadata = Read<unsigned int>(stream);

    if (numMeshes > AI_MAX_ALLOC(unsigned int)) {
        throw DeadlyImportError("Assbin: Too many meshes in node, would overflow");
    }
    if (numChildren > AI_MAX_ALLOC(aiNode *)) {
        throw DeadlyImportError("Assbin: Too many children in node, would overflow");
    }
    if (nb_metadata > AI_MAX_ALLOC(aiMetadataEntry)) {
        throw DeadlyImportError("Assbin: Too many metadata properties, would overflow");
    }

    if (parent != nullptr) {
        node->mParent = parent;
    }

    if (numMeshes > 0) {
        node->mMeshes = new unsigned int[numMeshes];
        ReadArray(stream, node->mMeshes, numMeshes);
        node->mNumMeshes = numMeshes;
    }

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

    if (nb_metadata > 0) {
        node->mMetaData = aiMetadata::Alloc(nb_metadata);
        for (unsigned int i = 0; i < nb_metadata; ++i) {
            node->mMetaData->mKeys[i] = Read<aiString>(stream);
            node->mMetaData->mValues[i].mType = (aiMetadataType)Read<uint16_t>(stream);
            void *data = nullptr;

            switch (node->mMetaData->mValues[i].mType) {
            case AI_BOOL: {
                data = new bool(Read<bool>(stream));
                break;
            }
            case AI_INT32: {
                data = new int32_t(Read<int32_t>(stream));
                break;
            }
            case AI_UINT64: {
                data = new uint64_t(Read<uint64_t>(stream));
                break;
            }
            case AI_FLOAT: {
                data = new ai_real(Read<ai_real>(stream));
                break;
            }
            case AI_DOUBLE: {
                data = new double(Read<double>(stream));
                break;
            }
            case AI_AISTRING: {
                data = new aiString(Read<aiString>(stream));
                break;
            }
            case AI_AIVECTOR3D: {
                data = new aiVector3D(Read<aiVector3D>(stream));
                break;
            }
#ifndef SWIG
            case FORCE_32BIT:
#endif // SWIG
            default:
                break;
            }

            node->mMetaData->mValues[i].mData = data;
        }
    }
    *onode = node.release();
}

// -----------------------------------------------------------------------------------
void AssbinImporter::ReadBinaryBone(IOStream *stream, aiBone *b) {
    if (Read<uint32_t>(stream) != ASSBIN_CHUNK_AIBONE)
        throw DeadlyImportError("Magic chunk identifiers are wrong!");
    /*uint32_t size =*/Read<uint32_t>(stream);

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

    if (b->mNumWeights > AI_MAX_ALLOC(aiVertexWeight) || (size_t)b->mNumWeights > SIZE_MAX / sizeof(aiVertexWeight)) {
        throw DeadlyImportError("Assbin: Too many weights, would overflow");
    }

    // 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 {
        b->mWeights = new aiVertexWeight[b->mNumWeights];
        ReadArray(stream, b->mWeights, b->mNumWeights);
    }
}

// -----------------------------------------------------------------------------------
static bool fitsIntoUI16(unsigned int mNumVertices) {
    return (mNumVertices < (1u << 16));
}

// -----------------------------------------------------------------------------------
void AssbinImporter::ReadBinaryMesh(IOStream *stream, aiMesh *mesh) {
    if (Read<uint32_t>(stream) != ASSBIN_CHUNK_AIMESH)
        throw DeadlyImportError("Magic chunk identifiers are wrong!");
    /*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);

    if (mesh->mNumVertices > AI_MAX_ALLOC(aiVector3D) || (size_t)mesh->mNumVertices > SIZE_MAX / sizeof(aiVector3D) ||
        mesh->mNumVertices > AI_MAX_ALLOC(aiColor4D) || (size_t)mesh->mNumVertices > SIZE_MAX / sizeof(aiColor4D)) {
        throw DeadlyImportError("Assbin: Too many vertices, would overflow");
    }
    if (mesh->mNumFaces > AI_MAX_ALLOC(aiFace) || (size_t)mesh->mNumFaces > SIZE_MAX / sizeof(aiFace)) {
        throw DeadlyImportError("Assbin: Too many faces, would overflow");
    }
    if (mesh->mNumBones > AI_MAX_ALLOC(aiBone *) || (size_t)mesh->mNumBones > SIZE_MAX / sizeof(aiBone *)) {
        throw DeadlyImportError("Assbin: Too many bones, would overflow");
    }

    // 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 {
            mesh->mVertices = new aiVector3D[mesh->mNumVertices];
            ReadArray(stream, mesh->mVertices, mesh->mNumVertices);
        }
    }
    if (c & ASSBIN_MESH_HAS_NORMALS) {
        if (shortened) {
            ReadBounds(stream, mesh->mNormals, mesh->mNumVertices);
        } else {
            mesh->mNormals = new aiVector3D[mesh->mNumVertices];
            ReadArray(stream, mesh->mNormals, 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 {
            mesh->mTangents = new aiVector3D[mesh->mNumVertices];
            ReadArray(stream, mesh->mTangents, mesh->mNumVertices);
            mesh->mBitangents = new aiVector3D[mesh->mNumVertices];
            ReadArray(stream, mesh->mBitangents, 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 {
            mesh->mColors[n] = new aiColor4D[mesh->mNumVertices];
            ReadArray(stream, mesh->mColors[n], mesh->mNumVertices);
        }
    }
    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 {
            mesh->mTextureCoords[n] = new aiVector3D[mesh->mNumVertices];
            ReadArray(stream, mesh->mTextureCoords[n], mesh->mNumVertices);
        }
    }

    // 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];

            static_assert(AI_MAX_FACE_INDICES <= 0xffff, "AI_MAX_FACE_INDICES <= 0xffff");
            f.mNumIndices = Read<uint16_t>(stream);
            if (f.mNumIndices > AI_MAX_FACE_INDICES) {
                throw DeadlyImportError("Assbin: Too many face indices, would overflow");
            }
            f.mIndices = new unsigned int[f.mNumIndices];

            for (unsigned int a = 0; a < f.mNumIndices; ++a) {
                // Check if unsigned  short ( 16 bit  ) are big enough for the indices
                if (fitsIntoUI16(mesh->mNumVertices)) {
                    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::ReadBinaryMaterialProperty(IOStream *stream, aiMaterialProperty *prop) {
    if (Read<uint32_t>(stream) != ASSBIN_CHUNK_AIMATERIALPROPERTY)
        throw DeadlyImportError("Magic chunk identifiers are wrong!");
    /*uint32_t size =*/Read<uint32_t>(stream);

    prop->mKey = Read<aiString>(stream);
    prop->mSemantic = Read<unsigned int>(stream);
    prop->mIndex = Read<unsigned int>(stream);

    prop->mDataLength = Read<unsigned int>(stream);
    prop->mType = (aiPropertyTypeInfo)Read<unsigned int>(stream);

    if (prop->mDataLength > AI_MAX_ALLOC(char)) {
        throw DeadlyImportError("Assbin: Material property data too large");
    }

    prop->mData = new char[prop->mDataLength];
    if (stream->Read(prop->mData, 1, prop->mDataLength) != prop->mDataLength) {
        throw DeadlyImportError("ASSBIN: Unexpected EOF reading material property data");
    }
}

// -----------------------------------------------------------------------------------
void AssbinImporter::ReadBinaryMaterial(IOStream *stream, aiMaterial *mat) {
    if (Read<uint32_t>(stream) != ASSBIN_CHUNK_AIMATERIAL)
        throw DeadlyImportError("Magic chunk identifiers are wrong!");
    /*uint32_t size =*/Read<uint32_t>(stream);

    mat->mNumAllocated = mat->mNumProperties = Read<unsigned int>(stream);
    if (mat->mNumProperties) {
        if (mat->mProperties) {
            delete[] mat->mProperties;
        }
        mat->mProperties = new aiMaterialProperty *[mat->mNumProperties]();
        for (unsigned int i = 0; i < mat->mNumProperties; ++i) {
            mat->mProperties[i] = new aiMaterialProperty();
            ReadBinaryMaterialProperty(stream, mat->mProperties[i]);
        }
    }
}

// -----------------------------------------------------------------------------------
void AssbinImporter::ReadBinaryNodeAnim(IOStream *stream, aiNodeAnim *nd) {
    if (Read<uint32_t>(stream) != ASSBIN_CHUNK_AINODEANIM)
        throw DeadlyImportError("Magic chunk identifiers are wrong!");
    /*uint32_t size =*/Read<uint32_t>(stream);

    nd->mNodeName = Read<aiString>(stream);
    nd->mNumPositionKeys = Read<unsigned int>(stream);
    nd->mNumRotationKeys = Read<unsigned int>(stream);
    nd->mNumScalingKeys = Read<unsigned int>(stream);
    nd->mPreState = (aiAnimBehaviour)Read<unsigned int>(stream);
    nd->mPostState = (aiAnimBehaviour)Read<unsigned int>(stream);

    if (nd->mNumPositionKeys > AI_MAX_ALLOC(aiVectorKey) || (size_t)nd->mNumPositionKeys > SIZE_MAX / sizeof(aiVectorKey)) {
        throw DeadlyImportError("Assbin: Too many position keys, would overflow");
    }
    if (nd->mNumRotationKeys > AI_MAX_ALLOC(aiQuatKey) || (size_t)nd->mNumRotationKeys > SIZE_MAX / sizeof(aiQuatKey)) {
        throw DeadlyImportError("Assbin: Too many rotation keys, would overflow");
    }
    if (nd->mNumScalingKeys > AI_MAX_ALLOC(aiVectorKey) || (size_t)nd->mNumScalingKeys > SIZE_MAX / sizeof(aiVectorKey)) {
        throw DeadlyImportError("Assbin: Too many scaling keys, would overflow");
    }

    if (nd->mNumPositionKeys) {
        if (shortened) {
            ReadBounds(stream, nd->mPositionKeys, nd->mNumPositionKeys);
        } else {
            nd->mPositionKeys = new aiVectorKey[nd->mNumPositionKeys];
            ReadArray(stream, nd->mPositionKeys, nd->mNumPositionKeys);
        }
    }
    if (nd->mNumRotationKeys) {
        if (shortened) {
            ReadBounds(stream, nd->mRotationKeys, nd->mNumRotationKeys);
        } else {
            nd->mRotationKeys = new aiQuatKey[nd->mNumRotationKeys];
            ReadArray(stream, nd->mRotationKeys, nd->mNumRotationKeys);
        }
    }
    if (nd->mNumScalingKeys) {
        if (shortened) {
            ReadBounds(stream, nd->mScalingKeys, nd->mNumScalingKeys);
        } else {
            nd->mScalingKeys = new aiVectorKey[nd->mNumScalingKeys];
            ReadArray(stream, nd->mScalingKeys, nd->mNumScalingKeys);
        }
    }
}

// -----------------------------------------------------------------------------------
void AssbinImporter::ReadBinaryAnim(IOStream *stream, aiAnimation *anim) {
    if (Read<uint32_t>(stream) != ASSBIN_CHUNK_AIANIMATION)
        throw DeadlyImportError("Magic chunk identifiers are wrong!");
    /*uint32_t size =*/Read<uint32_t>(stream);

    anim->mName = Read<aiString>(stream);
    anim->mDuration = Read<double>(stream);
    anim->mTicksPerSecond = Read<double>(stream);
    anim->mNumChannels = Read<unsigned int>(stream);

    if (anim->mNumChannels > AI_MAX_ALLOC(aiNodeAnim *) || (size_t)anim->mNumChannels > SIZE_MAX / sizeof(aiNodeAnim *)) {
        throw DeadlyImportError("Assbin: Too many animation channels, would overflow");
    }

    if (anim->mNumChannels) {
        anim->mChannels = new aiNodeAnim *[anim->mNumChannels]();
        for (unsigned int a = 0; a < anim->mNumChannels; ++a) {
            anim->mChannels[a] = new aiNodeAnim();
            ReadBinaryNodeAnim(stream, anim->mChannels[a]);
        }
    }
}

// -----------------------------------------------------------------------------------
void AssbinImporter::ReadBinaryTexture(IOStream *stream, aiTexture *tex) {
    if (Read<uint32_t>(stream) != ASSBIN_CHUNK_AITEXTURE) {
        throw DeadlyImportError("Magic chunk identifiers are wrong!");
    }
    Read<uint32_t>(stream); // size

    tex->mWidth = Read<unsigned int>(stream);
    tex->mHeight = Read<unsigned int>(stream);
    ReadBytes(stream, tex->achFormatHint, HINTMAXTEXTURELEN - 1, "texture format hint");

    if (!shortened) {
        if (!tex->mHeight) {
            if (tex->mWidth > AI_MAX_ALLOC(aiTexel)) {
                throw DeadlyImportError("Assbin: Texture width too large, would overflow");
            }
            tex->pcData = new aiTexel[tex->mWidth];
            if (stream->Read(tex->pcData, 1, tex->mWidth) != tex->mWidth) {
                throw DeadlyImportError("Assbin: Unexpected EOF reading compressed texture data");
            }
        } else {
            if (tex->mWidth != 0 &&
                static_cast<size_t>(tex->mHeight) >
                    SIZE_MAX / sizeof(aiTexel) / static_cast<size_t>(tex->mWidth)) {
                throw DeadlyImportError("Assbin: Texture dimensions too large");
            }

            const size_t pixelCount = static_cast<size_t>(tex->mWidth) * tex->mHeight;
            const size_t byteCount = pixelCount * sizeof(aiTexel);
            tex->pcData = new aiTexel[pixelCount];
            if (stream->Read(tex->pcData, 1, byteCount) != byteCount) {
                throw DeadlyImportError("Assbin: Unexpected EOF reading texture data");
            }
        }
    }
}

// -----------------------------------------------------------------------------------
void AssbinImporter::ReadBinaryLight(IOStream *stream, aiLight *l) {
    if (Read<uint32_t>(stream) != ASSBIN_CHUNK_AILIGHT)
        throw DeadlyImportError("Magic chunk identifiers are wrong!");
    /*uint32_t size =*/Read<uint32_t>(stream);

    l->mName = Read<aiString>(stream);
    l->mType = (aiLightSourceType)Read<unsigned int>(stream);

    l->mPosition = Read<aiVector3D>(stream);
    l->mDirection = Read<aiVector3D>(stream);
    l->mUp = Read<aiVector3D>(stream);

    if (l->mType != aiLightSource_DIRECTIONAL) {
        l->mAttenuationConstant = Read<float>(stream);
        l->mAttenuationLinear = Read<float>(stream);
        l->mAttenuationQuadratic = Read<float>(stream);
    }

    l->mColorDiffuse = Read<aiColor3D>(stream);
    l->mColorSpecular = Read<aiColor3D>(stream);
    l->mColorAmbient = Read<aiColor3D>(stream);

    if (l->mType == aiLightSource_SPOT) {
        l->mAngleInnerCone = Read<float>(stream);
        l->mAngleOuterCone = Read<float>(stream);
    }
}

// -----------------------------------------------------------------------------------
void AssbinImporter::ReadBinaryCamera(IOStream *stream, aiCamera *cam) {
    if (Read<uint32_t>(stream) != ASSBIN_CHUNK_AICAMERA)
        throw DeadlyImportError("Magic chunk identifiers are wrong!");
    /*uint32_t size =*/Read<uint32_t>(stream);

    cam->mName = Read<aiString>(stream);
    cam->mPosition = Read<aiVector3D>(stream);
    cam->mLookAt = Read<aiVector3D>(stream);
    cam->mUp = Read<aiVector3D>(stream);
    cam->mHorizontalFOV = Read<float>(stream);
    cam->mClipPlaneNear = Read<float>(stream);
    cam->mClipPlaneFar = Read<float>(stream);
    cam->mAspect = Read<float>(stream);
}

// -----------------------------------------------------------------------------------
void AssbinImporter::ReadBinaryScene(IOStream *stream, aiScene *scene) {
    if (Read<uint32_t>(stream) != ASSBIN_CHUNK_AISCENE)
        throw DeadlyImportError("Magic chunk identifiers are wrong!");
    /*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, (aiNode *)nullptr);

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

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

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

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

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

// -----------------------------------------------------------------------------------
void AssbinImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) {
    struct IOStreamDeleter {
        IOSystem* io;
        void operator()(IOStream* s) const {
            if (s) {
                io->Close(s);
            }
        }
    };

    auto stream = std::unique_ptr<IOStream, IOStreamDeleter>(
        pIOHandler->Open(pFile, "rb"),
        IOStreamDeleter{pIOHandler}
    );
    if (nullptr == stream) {
        throw DeadlyImportError("ASSBIN: Could not open ", pFile);
    }

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

    unsigned int versionMajor = Read<unsigned int>(stream.get());
    unsigned int versionMinor = Read<unsigned int>(stream.get());
    if (versionMinor != ASSBIN_VERSION_MINOR || versionMajor != ASSBIN_VERSION_MAJOR) {
        throw DeadlyImportError("Invalid version, data format not compatible!");
    }

    /*unsigned int versionRevision =*/Read<unsigned int>(stream.get());
    /*unsigned int compileFlags =*/Read<unsigned int>(stream.get());

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

    if (shortened) {
        throw DeadlyImportError("Shortened binaries are not supported!");
    }

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

    if (compressed) {
        uLongf uncompressedSize = Read<uint32_t>(stream.get());
        uLongf compressedSize = static_cast<uLongf>(stream->FileSize() - stream->Tell());

        std::vector<unsigned char> compressedData(compressedSize);
        const size_t len = stream->Read(compressedData.data(), 1, compressedSize);
        if (len != compressedSize) {
            throw DeadlyImportError("ASSBIN: Unexpected EOF while reading compressed data");
        }

        std::vector<unsigned char> uncompressedData(uncompressedSize);
        const int res = uncompress(uncompressedData.data(), &uncompressedSize, compressedData.data(), (uLong)len);
        if (res != Z_OK) {
            throw DeadlyImportError("Zlib decompression failed.");
        }

        MemoryIOStream io(uncompressedData.data(), uncompressedSize);

        ReadBinaryScene(&io, pScene);
    } else {
        ReadBinaryScene(stream.get(), pScene);
    }
}
#endif // !! ASSIMP_BUILD_NO_ASSBIN_IMPORTER

Coverage Report

Created: 2026-10-28 07:46