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1 files changed, 99 insertions, 0 deletions

diff --git a/loader/wall-atlas.cpp b/loader/wall-atlas.cpp
new file mode 100644
index 00000000..10f3524d
--- /dev/null
+++ b/loader/wall-atlas.cpp
@@ -0,0 +1,99 @@
+#include "loader/impl.hpp"
+#include "wall-info.hpp"
+#include "compat/assert.hpp"
+#include "compat/exception.hpp"
+#include "src/wall-atlas.hpp"
+#include "serialize/wall-atlas.hpp"
+#include "wall-info.hpp"
+#include "serialize/json-helper.hpp"
+#include "serialize/corrade-string.hpp"
+#include <Corrade/Containers/Array.h>
+#include <Corrade/Containers/ArrayViewStl.h>
+#include <Corrade/Utility/Path.h>
+#include <Magnum/Trade/ImageData.h>
+#include <vector>
+
+namespace floormat {
+NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(wall_info, name, descr)
+} // namespace floormat
+
+namespace floormat::loader_detail {
+
+std::shared_ptr<wall_atlas> loader_impl::get_wall_atlas(StringView filename)
+{
+    using namespace floormat::Wall;
+    using namespace floormat::Wall::detail;
+
+    const auto jroot = json_helper::from_json_(filename);
+    auto header = read_info_header(jroot);
+    auto frames = read_all_frames(jroot);
+
+    size_t direction_count = 0;
+    for (const auto& [str, curdir] : wall_atlas::directions)
+        if (jroot.contains(std::string_view{str.data(), str.size()}))
+            direction_count++;
+    fm_soft_assert(direction_count > 0);
+    fm_debug_assert(direction_count <= (size_t)Direction_::COUNT);
+
+    auto directions = Array<Direction>{direction_count};
+    std::array<DirArrayIndex, 4> dir_array_indexes{};
+
+    uint8_t dir_idx = 0;
+    for (const auto& [str, curdir] : wall_atlas::directions)
+    {
+        if (!jroot.contains(std::string_view{str.data(), str.size()}))
+            continue;
+        auto i = (size_t)curdir;
+        fm_debug_assert(dir_idx < direction_count);
+        dir_array_indexes[i] = { .val = dir_idx };
+        directions[dir_idx++] = read_direction_metadata(jroot, curdir);
+    }
+    fm_debug_assert(dir_idx == direction_count);
+
+    auto atlas = std::make_shared<class wall_atlas>();
+    return atlas;
+}
+
+const wall_info& loader_impl::wall_atlas(StringView name, StringView dir)
+{
+    fm_soft_assert(check_atlas_name(name));
+    char buf[FILENAME_MAX];
+    auto path = make_atlas_path(buf, dir, name);
+
+    auto it = wall_atlas_map.find(path);
+    if (it == wall_atlas_map.end())
+        fm_throw("no such wall atlas '{}'"_cf, fmt::string_view{path.data(), path.size()});
+    fm_assert(it->second != nullptr);
+    if (!it->second->atlas)
+    {
+        const_cast<wall_info*>(it->second)->atlas = get_wall_atlas(path);
+    }
+    return *it->second;
+}
+
+void loader_impl::get_wall_atlas_list()
+{
+    wall_atlas_array = json_helper::from_json<std::vector<wall_info>>(Path::join(WALL_TILESET_PATH, "walls.json"_s));
+    wall_atlas_array.shrink_to_fit();
+    wall_atlas_map.clear();
+    wall_atlas_map.reserve(wall_atlas_array.size()*2);
+
+    for (const auto& x : wall_atlas_array)
+    {
+        fm_soft_assert(check_atlas_name(x.name));
+        StringView name = x.name;
+        wall_atlas_map[name] = &x;
+        fm_debug_assert(name.data() == wall_atlas_map[name]->name.data());
+    }
+
+    fm_assert(!wall_atlas_map.empty());
+}
+
+ArrayView<const wall_info> loader_impl::wall_atlas_list()
+{
+    if (wall_atlas_map.empty())
+        get_wall_atlas_list();
+    return wall_atlas_array;
+}
+
+} // namespace floormat::loader_detail