chore: fix loading and writing code for IW5

src/ObjLoading/Game/IW5/Image/LoaderImageIW5.cpp

@@ -0,0 +1,69 @@
+#include "LoaderImageIW5.h"
+
+#include "Game/IW5/IW5.h"
+#include "Image/IwiLoader.h"
+
+#include <cstring>
+#include <format>
+#include <iostream>
+#include <sstream>
+
+using namespace IW5;
+
+namespace
+{
+    constexpr auto MAX_IMAGE_NAME_SIZE = 0x800;
+
+    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);
+
+            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->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->texture.loadDef = m_memory.Alloc<GfxImageLoadDef>();
+
+            return AssetCreationResult::Success(context.AddAsset<AssetImage>(assetName, image));
+        }
+
+    private:
+        MemoryManager& m_memory;
+        ISearchPath& m_search_path;
+    };
+} // namespace
+
+namespace IW5
+{
+    std::unique_ptr<AssetCreator<AssetImage>> CreateImageLoader(MemoryManager& memory, ISearchPath& searchPath)
+    {
+        return std::make_unique<ImageLoader>(memory, searchPath);
+    }
+} // namespace IW5