From c6abddc2349685a9476b6838a59893a17e443d2f Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Sun, 11 Feb 2024 01:58:39 +0100
Subject: wip anim atlas loader

---
 loader/anim-atlas.cpp           |  1 +
 loader/anim-traits.cpp          | 62 ++++++++++++++++++++++++++++++++++++++++-
 loader/anim-traits.hpp          |  2 +-
 loader/atlas-loader-storage.hpp |  1 +
 loader/atlas-loader.inl         |  6 ++--
 loader/ground-traits.cpp        |  1 +
 6 files changed, 68 insertions(+), 5 deletions(-)

diff --git a/loader/anim-atlas.cpp b/loader/anim-atlas.cpp
index 3ca61256..6fca5a49 100644
--- a/loader/anim-atlas.cpp
+++ b/loader/anim-atlas.cpp
@@ -60,6 +60,7 @@ std::shared_ptr<anim_atlas> loader_impl::anim_atlas(StringView name, StringView
     if (name == INVALID) return make_invalid_anim_atlas().atlas; // todo! hack
 
     fm_soft_assert(check_atlas_name(name));
+    fm_soft_assert(!dir || dir[dir.size()-1] == '/');
     char buf[fm_FILENAME_MAX];
     auto path = make_atlas_path(buf, dir, name);
 
diff --git a/loader/anim-traits.cpp b/loader/anim-traits.cpp
index 9741f62e..9ff7e6b5 100644
--- a/loader/anim-traits.cpp
+++ b/loader/anim-traits.cpp
@@ -1,13 +1,73 @@
 #include "anim-traits.hpp"
-#include "compat/exception.hpp"
+#include "atlas-loader-storage.hpp"
+#include "anim-cell.hpp"
+#include "src/anim-atlas.hpp"
+#include "src/tile-defs.hpp"
 #include "loader.hpp"
+#include "compat/exception.hpp"
 #include <cr/StringView.h>
+#include <cr/Pointer.h>
 #include <cr/Optional.h>
 #include <mg/ImageData.h>
 #include <mg/ImageView.h>
 
 namespace floormat::loader_detail {
 
+using anim_traits = atlas_loader_traits<anim_atlas>;
+StringView anim_traits::loader_name() { return "anim_atlas"_s; }
+auto anim_traits::atlas_of(const Cell& x) -> const std::shared_ptr<Atlas>& { return x.atlas; }
+auto anim_traits::atlas_of(Cell& x) -> std::shared_ptr<Atlas>& { return x.atlas; }
+StringView anim_traits::name_of(const Cell& x) { return x.name; }
+StringView anim_traits::name_of(const Atlas& x) { return x.name(); }
+String& anim_traits::name_of(Cell& x) { return x.name; }
+
+void anim_traits::ensure_atlases_loaded(Storage& s)
+{
+    fm_assert(s.name_map.empty());
+    s.cell_array = {};
+    s.cell_array.reserve(16);
+    s.name_map[loader.INVALID] = -1uz;
+}
+
+auto anim_traits::make_invalid_atlas(Storage& s) -> Pointer<Cell>
+{
+    fm_debug_assert(!s.invalid_atlas);
+    constexpr auto size = Vector2ui{16};
+
+    auto frame = anim_frame {
+        .ground = Vector2i(size/2),
+        .offset = {},
+        .size = size,
+    };
+    auto groups = Array<anim_group>{ValueInit, 1};
+    groups[0] = anim_group {
+        .name = "n"_s,
+        .frames = array({ frame }),
+    };
+    auto def = anim_def {
+        .object_name = loader.INVALID,
+        .anim_name = loader.INVALID,
+        .groups = Utility::move(groups),
+        .pixel_size = size,
+        .scale = anim_scale::fixed{size.x(), true},
+        .nframes = 1,
+    };
+    auto atlas = std::make_shared<class anim_atlas>(loader.INVALID, loader.make_error_texture(size), std::move(def));
+    auto info = anim_cell{
+        .name = loader.INVALID,
+        .atlas = atlas,
+    };
+    return Pointer<anim_cell>{ InPlace, std::move(info) };
+}
+
+auto anim_traits::make_atlas(StringView name, const Cell&) -> std::shared_ptr<Atlas>
+{
+    return {}; // todo
+}
 
+auto anim_traits::make_cell(StringView) -> Optional<Cell>
+{
+    return {};
+}
 
 } // namespace floormat::loader_detail
diff --git a/loader/anim-traits.hpp b/loader/anim-traits.hpp
index 3c4a43af..8eef8b89 100644
--- a/loader/anim-traits.hpp
+++ b/loader/anim-traits.hpp
@@ -20,7 +20,7 @@ template<> struct atlas_loader_traits<anim_atlas>
     static StringView name_of(const Atlas& x);
     static String& name_of(Cell& x);
     static void ensure_atlases_loaded(Storage& st);
-    static const Cell& make_invalid_atlas(Storage& st);
+    static Pointer<Cell> make_invalid_atlas(Storage& st);
     static std::shared_ptr<Atlas> make_atlas(StringView name, const Cell& c);
     static Optional<Cell> make_cell(StringView name);
 };
diff --git a/loader/atlas-loader-storage.hpp b/loader/atlas-loader-storage.hpp
index c8bd3261..c5e45cc2 100644
--- a/loader/atlas-loader-storage.hpp
+++ b/loader/atlas-loader-storage.hpp
@@ -2,6 +2,7 @@
 #include "compat/int-hash.hpp"
 #include "atlas-loader-fwd.hpp"
 #include <vector>
+#include <cr/StringView.h>
 #include <tsl/robin_map.h>
 
 namespace floormat::loader_detail {
diff --git a/loader/atlas-loader.inl b/loader/atlas-loader.inl
index f5cd39ea..c1093f82 100644
--- a/loader/atlas-loader.inl
+++ b/loader/atlas-loader.inl
@@ -50,12 +50,12 @@ auto atlas_loader<ATLAS, TRAITS>::ensure_atlas_list() -> ArrayView<const Cell>
       s.name_map[loader.INVALID] = sz;
     }
 
-    fm_assert(!s.name_map.empty());
-    fm_assert(!s.cell_array.empty());
-
     for (const auto& [name, index] : s.name_map)
         fm_assert(index < s.cell_array.size() || index == -1uz);
 
+    fm_debug_assert(!s.name_map.empty());
+    fm_debug_assert(!s.cell_array.empty());
+
     return { s.cell_array.data(), s.cell_array.size() };
 }
 
diff --git a/loader/ground-traits.cpp b/loader/ground-traits.cpp
index e56f0692..f1795f4e 100644
--- a/loader/ground-traits.cpp
+++ b/loader/ground-traits.cpp
@@ -32,6 +32,7 @@ void ground_traits::ensure_atlases_loaded(Storage& s)
 
 auto ground_traits::make_invalid_atlas(Storage& s) -> Pointer<Cell>
 {
+    fm_debug_assert(!s.invalid_atlas);
     fm_assert(!s.invalid_atlas);
     auto atlas = std::make_shared<Atlas>(
         ground_def{loader.INVALID, Vector2ub{1,1}, pass_mode::pass},
-- 
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