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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>
#include <Corrade/Containers/StringStlHash.h>
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())>;
void load_sceneries();
std::shared_ptr<tile_atlas> lookup_atlas(atlasid id);
void read_atlases(reader_t& reader);
void read_sceneries(reader_t& reader);
void read_chunks(reader_t& reader);
std::unordered_map<atlasid, std::shared_ptr<tile_atlas>> atlases;
std::unordered_map<StringView, const serialized_scenery*> default_sceneries;
std::vector<scenery_proto> sceneries;
world* _world;
std::uint16_t PROTO = (std::uint16_t)-1;
};
reader_state::reader_state(world& world) noexcept : _world{&world} {}
void reader_state::load_sceneries()
{
for (const serialized_scenery& s : loader.sceneries())
default_sceneries[s.name] = &s;
}
void reader_state::read_atlases(reader_t& s)
{
const auto N = s.read<atlasid>();
atlases.reserve(N * 2);
for (atlasid i = 0; i < N; i++)
{
Vector2ub size;
s >> size[0];
s >> size[1];
const auto& [buf, len] = s.read_asciiz_string<atlas_name_max>();
atlases[i] = loader.tile_atlas({buf, len}, size);
}
}
template<typename T>
bool read_scenery_flags(binary_reader<T>& s, scenery& sc)
{
std::uint8_t flags; s >> flags;
sc.passable = !!(flags & 1 << 0);
sc.blocks_view = !!(flags & 1 << 1);
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)
{
std::uint16_t magic; s >> magic;
if (magic != scenery_magic)
fm_abort("bad scenery magic");
atlasid sz; s >> sz;
fm_assert(sz < scenery_id_max);
sceneries.resize(sz);
std::size_t i = 0;
while (i < sz)
{
std::uint8_t num; s >> num;
fm_assert(num > 0);
auto str = s.read_asciiz_string<atlas_name_max>();
auto it = default_sceneries.find(StringView{str.buf, str.len});
if (it == default_sceneries.end())
fm_abort("can't find scenery '%s'", str.buf);
for (std::size_t n = 0; n < num; n++)
{
atlasid id; s >> id;
fm_assert(id < sz);
scenery_proto sc = it->second->proto;
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
s >> sc.frame.frame;
fm_assert(sc.frame.frame < sc.atlas->info().nframes);
sceneries[id] = sc;
}
i += num;
}
fm_assert(i == sz);
for (const scenery_proto& x : sceneries)
fm_assert(x.atlas != nullptr);
}
std::shared_ptr<tile_atlas> reader_state::lookup_atlas(atlasid id)
{
if (auto it = atlases.find(id); it != atlases.end())
return it->second;
else
fm_abort("not such atlas: '%zu'", (std::size_t)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;
s >> magic;
if (magic != chunk_magic)
fm_abort("bad chunk magic");
chunk_coords coord;
s >> coord.x;
s >> coord.y;
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>();
auto v = s.read<variant_t>();
auto atlas = lookup_atlas(id);
fm_assert(v < atlas->num_tiles());
return { atlas, v };
};
t.pass_mode() = 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; s >> id;
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;
fm_assert(id < sceneries.size());
auto sc = sceneries[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
s >> sc.frame.frame;
if (sc.frame.active)
s >> sc.frame.delta;
}
t.scenery() = sc;
}
switch (auto x = pass_mode(flags & pass_mask))
{
case pass_shoot_through:
case pass_blocked:
case pass_ok:
t.pass_mode() = x;
break;
default: [[unlikely]]
fm_abort("bad pass mode '%zu' for tile %zu", i, (std::size_t)x);
}
}
}
}
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_abort("bad magic");
proto_t proto;
s >> proto;
if (!(proto >= min_proto_version && proto <= proto_version))
fm_abort("bad proto version '%zu' (should be between '%zu' and '%zu')",
(std::size_t)proto, (std::size_t)min_proto_version, (std::size_t)proto_version);
PROTO = proto;
load_sceneries();
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_assert(filename.flags() & StringViewFlag::NullTerminated);
FILE_raii f = ::fopen(filename.data(), "rb");
if (!f)
{
get_error_string(errbuf);
fm_abort("fopen(\"%s\", \"r\"): %s", filename.data(), errbuf);
}
if (int ret = ::fseek(f, 0, SEEK_END); ret != 0)
{
get_error_string(errbuf);
fm_abort("fseek(SEEK_END): %s", errbuf);
}
std::size_t len;
if (auto len_ = ::ftell(f); len_ >= 0)
len = (std::size_t)len_;
else
{
get_error_string(errbuf);
fm_abort("ftell: %s", errbuf);
}
if (int ret = ::fseek(f, 0, SEEK_SET); ret != 0)
{
get_error_string(errbuf);
fm_abort("fseek(SEEK_SET): %s", errbuf);
}
auto buf_ = std::make_unique<char[]>(len);
if (auto ret = ::fread(&buf_[0], 1, len, f); ret != len)
{
get_error_string(errbuf);
fm_abort("fread short read: %s", errbuf);
}
world w;
reader_state s{w};
s.deserialize_world({buf_.get(), len});
return w;
}
} // namespace floormat
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