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#define FM_SERIALIZE_WORLD_IMPL
#include "world-impl.hpp"
#include "binary-reader.inl"
#include "src/world.hpp"
#include "loader/loader.hpp"
#include "loader/scenery.hpp"
#include "src/tile-atlas.hpp"
#include "src/anim-atlas.hpp"
#include <cstring>
namespace {
using namespace floormat;
using namespace floormat::Serialize;
struct reader_state final {
explicit reader_state(world& world) noexcept;
void deserialize_world(ArrayView<const char> buf);
private:
using reader_t = binary_reader<decltype(ArrayView<const char>{}.cbegin())>;
const std::shared_ptr<tile_atlas>& lookup_atlas(atlasid id);
const scenery_proto& lookup_scenery(atlasid id);
void read_atlases(reader_t& reader);
void read_sceneries(reader_t& reader);
void read_chunks(reader_t& reader);
std::vector<scenery_proto> sceneries;
std::vector<std::shared_ptr<tile_atlas>> atlases;
world* _world;
std::uint16_t PROTO = (std::uint16_t)-1;
};
reader_state::reader_state(world& world) noexcept : _world{&world} {}
void reader_state::read_atlases(reader_t& s)
{
const auto N = s.read<atlasid>();
atlases.reserve(N);
for (atlasid i = 0; i < N; i++)
{
Vector2ub size;
size[0] << s;
size[1] << s;
const auto& [buf, len] = s.read_asciiz_string<atlas_name_max>();
auto atlas = loader.tile_atlas({buf, len});
fm_soft_assert(size == atlas->num_tiles2());
atlases.push_back(std::move(atlas));
}
}
template<typename T>
bool read_scenery_flags(binary_reader<T>& s, scenery& sc)
{
std::uint8_t flags; flags << s;
sc.passability = pass_mode(flags & pass_mask);
sc.active = !!(flags & 1 << 2);
sc.closing = !!(flags & 1 << 3);
sc.interactive = !!(flags & 1 << 4);
return flags & 1 << 7;
}
void reader_state::read_sceneries(reader_t& s)
{
(void)loader.sceneries();
std::uint16_t magic; magic << s;
if (magic != scenery_magic)
fm_throw("bad scenery magic"_cf);
atlasid sz; sz << s;
fm_soft_assert(sz < scenery_id_max);
sceneries.resize(sz);
std::size_t i = 0;
while (i < sz)
{
std::uint8_t num; num << s;
fm_soft_assert(num > 0);
auto str = s.read_asciiz_string<atlas_name_max>();
const auto sc_ = loader.scenery(str);
for (std::size_t n = 0; n < num; n++)
{
atlasid id; id << s;
fm_soft_assert(id < sz);
fm_soft_assert(!sceneries[id]);
scenery_proto sc = sc_;
bool short_frame = read_scenery_flags(s, sc.frame);
fm_debug_assert(sc.atlas != nullptr);
if (short_frame)
sc.frame.frame = s.read<std::uint8_t>();
else
sc.frame.frame << s;
fm_soft_assert(sc.frame.frame < sc.atlas->info().nframes);
sceneries[id] = sc;
}
i += num;
}
fm_soft_assert(i == sz);
}
const std::shared_ptr<tile_atlas>& reader_state::lookup_atlas(atlasid id)
{
if (id < atlases.size())
return atlases[id];
else
fm_throw("no such atlas: '{}'"_cf, id);
}
const scenery_proto& reader_state::lookup_scenery(atlasid id)
{
if (id < sceneries.size())
return sceneries[id];
else
fm_throw("no such scenery: '{}'"_cf, id);
}
void reader_state::read_chunks(reader_t& s)
{
const auto N = s.read<chunksiz>();
for (std::size_t k = 0; k < N; k++)
{
std::decay_t<decltype(chunk_magic)> magic;
magic << s;
if (magic != chunk_magic)
fm_throw("bad chunk magic"_cf);
chunk_coords coord;
coord.x << s;
coord.y << s;
auto& chunk = (*_world)[coord];
for (std::size_t i = 0; i < TILE_COUNT; i++)
{
const tilemeta flags = s.read<tilemeta>();
tile_ref t = chunk[i];
using uchar = std::uint8_t;
const auto make_atlas = [&]() -> tile_image_proto {
auto id = flags & meta_short_atlasid ? atlasid{s.read<uchar>()} : s.read<atlasid>();
variant_t v;
if (PROTO >= 2) [[likely]]
v << s;
else
v = flags & meta_short_variant_
? s.read<std::uint8_t>()
: std::uint8_t(s.read<std::uint16_t>());
auto atlas = lookup_atlas(id);
fm_soft_assert(v < atlas->num_tiles());
return { atlas, v };
};
//t.passability() = pass_mode(flags & pass_mask);
if (flags & meta_ground)
t.ground() = make_atlas();
if (flags & meta_wall_n)
t.wall_north() = make_atlas();
if (flags & meta_wall_w)
t.wall_west() = make_atlas();
if (PROTO >= 3) [[likely]]
if (flags & meta_scenery)
{
atlasid id; id << s;
const bool exact = id & meta_long_scenery_bit;
const auto r = rotation(id >> sizeof(id)*8-1-rotation_BITS & rotation_MASK);
id &= ~scenery_id_flag_mask;
auto sc = lookup_scenery(id);
(void)sc.atlas->group(r);
sc.frame.r = r;
if (!exact)
{
if (read_scenery_flags(s, sc.frame))
sc.frame.frame = s.read<std::uint8_t>();
else
sc.frame.frame << s;
if (PROTO >= 5) [[likely]]
{
sc.frame.offset[0] << s;
sc.frame.offset[1] << s;
}
if (PROTO >= 6) [[likely]]
{
sc.frame.bbox_size[0] << s;
sc.frame.bbox_size[1] << s;
}
if (PROTO >= 7) [[likely]]
{
sc.frame.bbox_offset[0] << s;
sc.frame.bbox_offset[1] << s;
}
if (sc.frame.active)
{
if (PROTO >= 4) [[likely]]
sc.frame.delta << s;
else
sc.frame.delta = (std::uint16_t)Math::clamp(int(s.read<float>() * 65535), 0, 65535);
}
}
t.scenery() = sc;
}
}
}
}
void reader_state::deserialize_world(ArrayView<const char> buf)
{
auto s = binary_reader{buf};
if (!!::memcmp(s.read<std::size(file_magic)-1>().data(), file_magic, std::size(file_magic)-1))
fm_throw("bad magic"_cf);
proto_t proto;
proto << s;
if (!(proto >= min_proto_version && proto <= proto_version))
fm_throw("bad proto version '{}' (should be between '{}' and '{}')"_cf,
(std::size_t)proto, (std::size_t)min_proto_version, (std::size_t)proto_version);
PROTO = proto;
read_atlases(s);
if (PROTO >= 3)
read_sceneries(s);
read_chunks(s);
s.assert_end();
}
} // namespace
namespace floormat {
world world::deserialize(StringView filename)
{
char errbuf[128];
constexpr auto get_error_string = []<std::size_t N> (char (&buf)[N]) {
buf[0] = '\0';
#ifndef _WIN32
(void)::strerror_r(errno, buf, std::size(buf));
#else
(void)::strerror_s(buf, std::size(buf), errno);
#endif
};
fm_soft_assert(filename.flags() & StringViewFlag::NullTerminated);
FILE_raii f = ::fopen(filename.data(), "rb");
if (!f)
{
get_error_string(errbuf);
fm_throw("fopen(\"{}\", \"r\"): {}"_cf, filename.data(), errbuf);
}
if (int ret = ::fseek(f, 0, SEEK_END); ret != 0)
{
get_error_string(errbuf);
fm_throw("fseek(SEEK_END): {}"_cf, errbuf);
}
std::size_t len;
if (auto len_ = ::ftell(f); len_ >= 0)
len = (std::size_t)len_;
else
{
get_error_string(errbuf);
fm_throw("ftell: {}"_cf, errbuf);
}
if (int ret = ::fseek(f, 0, SEEK_SET); ret != 0)
{
get_error_string(errbuf);
fm_throw("fseek(SEEK_SET): {}"_cf, errbuf);
}
auto buf_ = std::make_unique<char[]>(len);
if (auto ret = ::fread(&buf_[0], 1, len, f); ret != len)
{
get_error_string(errbuf);
fm_throw("fread short read: {}"_cf, errbuf);
}
world w;
reader_state s{w};
s.deserialize_world({buf_.get(), len});
return w;
}
} // namespace floormat
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