mirror of
https://github.com/Laupetin/OpenAssetTools.git
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81 lines
2.3 KiB
C++
81 lines
2.3 KiB
C++
#include "AssetLoaderRawFile.h"
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#include "Game/IW4/IW4.h"
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#include "Pool/GlobalAssetPool.h"
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#include <cstring>
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#include <filesystem>
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#include <iostream>
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#include <zlib.h>
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using namespace IW4;
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void* AssetLoaderRawFile::CreateEmptyAsset(const std::string& assetName, MemoryManager* memory)
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{
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auto* rawFile = memory->Create<RawFile>();
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memset(rawFile, 0, sizeof(RawFile));
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rawFile->name = memory->Dup(assetName.c_str());
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return rawFile;
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}
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bool AssetLoaderRawFile::CanLoadFromRaw() const
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{
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return true;
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}
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bool AssetLoaderRawFile::LoadFromRaw(
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const std::string& assetName, ISearchPath* searchPath, MemoryManager* memory, IAssetLoadingManager* manager, Zone* zone) const
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{
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const auto file = searchPath->Open(assetName);
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if (!file.IsOpen())
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return false;
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const auto uncompressedBuffer = std::make_unique<char[]>(static_cast<size_t>(file.m_length));
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file.m_stream->read(uncompressedBuffer.get(), file.m_length);
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if (file.m_stream->gcount() != file.m_length)
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return false;
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const auto compressionBufferSize = static_cast<size_t>(file.m_length + COMPRESSED_BUFFER_SIZE_PADDING);
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auto* compressedBuffer = memory->Alloc<char>(compressionBufferSize);
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z_stream_s zs{};
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zs.zalloc = Z_NULL;
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zs.zfree = Z_NULL;
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zs.opaque = Z_NULL;
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zs.avail_in = static_cast<uInt>(file.m_length);
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zs.avail_out = compressionBufferSize;
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zs.next_in = reinterpret_cast<const Bytef*>(uncompressedBuffer.get());
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zs.next_out = reinterpret_cast<Bytef*>(compressedBuffer);
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int ret = deflateInit(&zs, Z_DEFAULT_COMPRESSION);
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if (ret != Z_OK)
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{
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throw std::runtime_error("Initializing deflate failed");
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}
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ret = deflate(&zs, Z_FINISH);
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if (ret != Z_STREAM_END)
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{
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std::cerr << "Deflate failed for loading rawfile \"" << assetName << "\"\n";
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deflateEnd(&zs);
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return false;
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}
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const auto compressedSize = compressionBufferSize - zs.avail_out;
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auto* rawFile = memory->Create<RawFile>();
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rawFile->name = memory->Dup(assetName.c_str());
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rawFile->compressedLen = static_cast<int>(compressedSize);
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rawFile->len = static_cast<int>(file.m_length);
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rawFile->data.compressedBuffer = static_cast<const char*>(compressedBuffer);
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deflateEnd(&zs);
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manager->AddAsset<AssetRawFile>(assetName, rawFile);
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return true;
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}
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