chore: fix loading and writing code for T6

src/ObjLoading/Game/T6/Image/LoaderImageT6.cpp

@@ -0,0 +1,77 @@
+#include "LoaderImageT6.h"
+
+#include "Game/T6/CommonT6.h"
+#include "Game/T6/T6.h"
+#include "Image/IwiLoader.h"
+
+#include <cstring>
+#include <format>
+#include <iostream>
+#include <sstream>
+#include <zlib.h>
+
+using namespace T6;
+
+namespace
+{
+    class ImageLoader final : public AssetCreator<AssetImage>
+    {
+    public:
+        ImageLoader(MemoryManager& memory, ISearchPath& searchPath)
+            : m_memory(memory),
+              m_search_path(searchPath)
+        {
+        }
+
+        AssetCreationResult CreateAsset(const std::string& assetName, AssetCreationContext& context) override
+        {
+            const auto fileName = std::format("images/{}.iwi", assetName);
+            const auto file = m_search_path.Open(fileName);
+            if (!file.IsOpen())
+                return AssetCreationResult::NoAction();
+
+            const auto fileSize = static_cast<size_t>(file.m_length);
+            const auto fileData = std::make_unique<char[]>(fileSize);
+            file.m_stream->read(fileData.get(), fileSize);
+            const auto dataHash = static_cast<unsigned>(crc32(0u, reinterpret_cast<const Bytef*>(fileData.get()), fileSize));
+
+            std::istringstream ss(std::string(fileData.get(), fileSize));
+            const auto texture = iwi::LoadIwi(ss);
+            if (!texture)
+            {
+                std::cerr << std::format("Failed to load texture from: {}\n", fileName);
+                return AssetCreationResult::Failure();
+            }
+
+            auto* image = m_memory.Alloc<GfxImage>();
+            image->name = m_memory.Dup(assetName.c_str());
+            image->hash = Common::R_HashString(image->name, 0);
+            image->delayLoadPixels = true;
+
+            image->noPicmip = !texture->HasMipMaps();
+            image->width = static_cast<uint16_t>(texture->GetWidth());
+            image->height = static_cast<uint16_t>(texture->GetHeight());
+            image->depth = static_cast<uint16_t>(texture->GetDepth());
+
+            image->streaming = 1;
+            image->streamedParts[0].levelCount = 1;
+            image->streamedParts[0].levelSize = static_cast<uint32_t>(fileSize);
+            image->streamedParts[0].hash = dataHash & 0x1FFFFFFF;
+            image->streamedPartCount = 1;
+
+            return AssetCreationResult::Success(context.AddAsset<AssetImage>(assetName, image));
+        }
+
+    private:
+        MemoryManager& m_memory;
+        ISearchPath& m_search_path;
+    };
+} // namespace
+
+namespace T6
+{
+    std::unique_ptr<AssetCreator<AssetImage>> CreateImageLoader(MemoryManager& memory, ISearchPath& searchPath)
+    {
+        return std::make_unique<ImageLoader>(memory, searchPath);
+    }
+} // namespace T6