work on the atlas loaders

1 files changed, 126 insertions, 0 deletions

diff --git a/loader/anim.cpp b/loader/anim.cpp
new file mode 100644
index 00000000..25b5e292
--- /dev/null
+++ b/loader/anim.cpp
@@ -0,0 +1,126 @@
+#include "impl.hpp"
+#include "loader/anim-info.hpp"
+#include "compat/exception.hpp"
+#include "src/anim-atlas.hpp"
+#include <Corrade/Containers/Array.h>
+#include <Corrade/Containers/StridedArrayView.h>
+#include <Corrade/Utility/Path.h>
+#include <Magnum/Trade/ImageData.h>
+
+namespace floormat {
+
+std::shared_ptr<class anim_atlas>
+loader_::get_anim_atlas(StringView path) noexcept(false)
+{
+    auto anim_info = deserialize_anim_def(path + ".json");
+
+    for (anim_group& group : anim_info.groups)
+    {
+        if (!group.mirror_from.isEmpty())
+        {
+            auto it = std::find_if(anim_info.groups.cbegin(), anim_info.groups.cend(),
+                                   [&](const anim_group& x) { return x.name == group.mirror_from; });
+            if (it == anim_info.groups.cend())
+                fm_throw("can't find group '{}' to mirror from '{}'"_cf, group.mirror_from, group.name);
+            group.frames = array(arrayView(it->frames));
+            for (anim_frame& f : group.frames)
+                f.ground = Vector2i((Int)f.size[0] - f.ground[0], f.ground[1]);
+        }
+    }
+
+    auto tex = texture(""_s, path);
+
+    fm_soft_assert(!anim_info.object_name.isEmpty());
+    fm_soft_assert(anim_info.pixel_size.product() > 0);
+    fm_soft_assert(!anim_info.groups.isEmpty());
+    fm_soft_assert(anim_info.nframes > 0);
+    fm_soft_assert(anim_info.nframes == 1 || anim_info.fps > 0);
+    const auto size = tex.pixels().size();
+    const auto width = size[1], height = size[0];
+    fm_soft_assert(anim_info.pixel_size[0] == width && anim_info.pixel_size[1] == height);
+
+    auto atlas = std::make_shared<class anim_atlas>(path, tex, std::move(anim_info));
+    return atlas;
+}
+
+} // namespace floormat
+
+namespace floormat::loader_detail {
+
+ArrayView<const String> loader_impl::anim_atlas_list()
+{
+    if (anim_atlases.empty())
+        get_anim_atlas_list();
+    fm_assert(!anim_atlases.empty());
+    return { anim_atlases.data(), anim_atlases.size() };
+}
+
+std::shared_ptr<anim_atlas> loader_impl::anim_atlas(StringView name, StringView dir, loader_policy policy) noexcept(false)
+{
+    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[FILENAME_MAX];
+    auto path = make_atlas_path(buf, dir, name);
+
+    if (auto it = anim_atlas_map.find(path); it != anim_atlas_map.end())
+        return it->second;
+    else
+    {
+        auto atlas = get_anim_atlas(path);
+        return anim_atlas_map[atlas->name()] = atlas;
+    }
+}
+
+void loader_impl::get_anim_atlas_list()
+{
+    anim_atlases.clear();
+    using f = Path::ListFlag;
+    constexpr auto flags = f::SkipDirectories | f::SkipDotAndDotDot | f::SkipSpecial | f::SortAscending;
+    if (const auto list = Path::list(ANIM_PATH, flags); list)
+    {
+        anim_atlases.reserve(list->size());
+        constexpr auto suffix = ".json"_s;
+        for (StringView str : *list)
+            if (str.hasSuffix(suffix))
+                anim_atlases.emplace_back(str.exceptSuffix(suffix.size()));
+    }
+    anim_atlases.shrink_to_fit();
+    fm_assert(!anim_atlases.empty());
+}
+
+const anim_info& loader_impl::make_invalid_anim_atlas()
+{
+    if (invalid_anim_atlas) [[likely]]
+        return *invalid_anim_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 = INVALID,
+        .anim_name = 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>(INVALID, make_error_texture(size), std::move(def));
+    auto info = anim_info {
+        .name = INVALID,
+        .atlas = atlas,
+    };
+    invalid_anim_atlas = Pointer<anim_info>{ InPlace, std::move(info) };
+    return *invalid_anim_atlas;
+}
+
+} // namespace floormat::loader_detail