Merge pull request #48 from diamante0018/main

feature: Load GSC BIN files from gsc-tool  from raw

src/ObjLoading/Game/IW5/AssetLoaders/AssetLoaderScriptFile.cpp

@@ -0,0 +1,78 @@
+#include "AssetLoaderScriptFile.h"
+
+#include "Game/IW5/IW5.h"
+#include "Pool/GlobalAssetPool.h"
+
+#include <cstring>
+#include <filesystem>
+#include <iostream>
+
+using namespace IW5;
+
+void* AssetLoaderScriptFile::CreateEmptyAsset(const std::string& assetName, MemoryManager* memory)
+{
+    auto* scriptFile = memory->Create<ScriptFile>();
+    memset(scriptFile, 0, sizeof(ScriptFile));
+    scriptFile->name = memory->Dup(assetName.c_str());
+    return scriptFile;
+}
+
+bool AssetLoaderScriptFile::CanLoadFromRaw() const
+{
+    return true;
+}
+
+// See https://github.com/xensik/gsc-tool#file-format for an in-depth explanation about the .gscbin format
+bool AssetLoaderScriptFile::LoadFromRaw(
+    const std::string& assetName, ISearchPath* searchPath, MemoryManager* memory, IAssetLoadingManager* manager, Zone* zone) const
+{
+    const auto file = searchPath->Open(assetName + ".gscbin");
+    if (!file.IsOpen())
+        return false;
+
+    const auto fileBuffer = std::make_unique<char[]>(static_cast<size_t>(file.m_length));
+    file.m_stream->read(fileBuffer.get(), file.m_length);
+    if (file.m_stream->gcount() != file.m_length)
+        return false;
+
+    auto* scriptFile = memory->Create<ScriptFile>();
+    scriptFile->name = memory->Dup(assetName.c_str());
+
+    // Retrieve data from the buffer
+    size_t offset = 0;
+
+    // Read past the name pointer, we will use the one from assetName
+    offset += strlen(fileBuffer.get()) + 1;
+
+    memcpy(&scriptFile->compressedLen, fileBuffer.get() + offset, sizeof(scriptFile->compressedLen));
+    offset += sizeof(scriptFile->compressedLen);
+
+    memcpy(&scriptFile->len, fileBuffer.get() + offset, sizeof(scriptFile->len));
+    offset += sizeof(scriptFile->len);
+
+    memcpy(&scriptFile->bytecodeLen, fileBuffer.get() + offset, sizeof(scriptFile->bytecodeLen));
+    offset += sizeof(scriptFile->bytecodeLen);
+
+    if (scriptFile->compressedLen <= 0 || scriptFile->bytecodeLen <= 0)
+    {
+        std::cerr << "Error: Invalid length of the buffers in " << assetName << " specified" << std::endl;
+        return false;
+    }
+
+    if (offset + (scriptFile->compressedLen + scriptFile->bytecodeLen) > file.m_length)
+    {
+        std::cerr << "Error: Specified length in " << assetName << " GSC BIN structure exceeds the actual file size" << std::endl;
+        return false;
+    }
+
+    scriptFile->buffer = static_cast<char*>(memory->Alloc(scriptFile->compressedLen));
+    memcpy(const_cast<char*>(scriptFile->buffer), fileBuffer.get() + offset, scriptFile->compressedLen);
+    offset += scriptFile->compressedLen;
+
+    scriptFile->bytecode = static_cast<unsigned char*>(memory->Alloc(scriptFile->bytecodeLen));
+    memcpy(scriptFile->bytecode, fileBuffer.get() + offset, scriptFile->bytecodeLen);
+
+    manager->AddAsset(ASSET_TYPE_SCRIPTFILE, assetName, scriptFile);
+
+    return true;
+}

src/ObjLoading/Game/IW5/AssetLoaders/AssetLoaderScriptFile.h

@@ -0,0 +1,17 @@
+#pragma once
+#include "AssetLoading/BasicAssetLoader.h"
+#include "AssetLoading/IAssetLoadingManager.h"
+#include "Game/IW5/IW5.h"
+#include "SearchPath/ISearchPath.h"
+
+namespace IW5
+{
+    class AssetLoaderScriptFile final : public BasicAssetLoader<ASSET_TYPE_SCRIPTFILE, ScriptFile>
+    {
+    public:
+        _NODISCARD void* CreateEmptyAsset(const std::string& assetName, MemoryManager* memory) override;
+        _NODISCARD bool CanLoadFromRaw() const override;
+        bool
+            LoadFromRaw(const std::string& assetName, ISearchPath* searchPath, MemoryManager* memory, IAssetLoadingManager* manager, Zone* zone) const override;
+    };
+} // namespace IW5

src/ObjLoading/Game/IW5/ObjLoaderIW5.cpp

@@ -5,6 +5,7 @@
 #include "AssetLoaders/AssetLoaderMenuDef.h"
 #include "AssetLoaders/AssetLoaderMenuList.h"
 #include "AssetLoaders/AssetLoaderRawFile.h"
+#include "AssetLoaders/AssetLoaderScriptFile.h"
 #include "AssetLoaders/AssetLoaderStringTable.h"
 #include "AssetLoading/AssetLoadingManager.h"
 #include "Game/IW5/GameAssetPoolIW5.h"
@@ -60,7 +61,7 @@ ObjLoader::ObjLoader()
     REGISTER_ASSET_LOADER(BASIC_LOADER(ASSET_TYPE_IMPACT_FX, FxImpactTable))
     REGISTER_ASSET_LOADER(BASIC_LOADER(ASSET_TYPE_SURFACE_FX, SurfaceFxTable))
     REGISTER_ASSET_LOADER(AssetLoaderRawFile)
-    REGISTER_ASSET_LOADER(BASIC_LOADER(ASSET_TYPE_SCRIPTFILE, ScriptFile))
+    REGISTER_ASSET_LOADER(AssetLoaderScriptFile)
     REGISTER_ASSET_LOADER(AssetLoaderStringTable)
     REGISTER_ASSET_LOADER(BASIC_LOADER(ASSET_TYPE_LEADERBOARD, LeaderboardDef))
     REGISTER_ASSET_LOADER(BASIC_LOADER(ASSET_TYPE_STRUCTURED_DATA_DEF, StructuredDataDefSet))