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#define FM_SERIALIZE_WORLD_IMPL
#include "world-impl.hpp"
#include "src/tile-atlas.hpp"
#include "binary-writer.inl"
#include "src/global-coords.hpp"
#include "src/chunk.hpp"
#include "src/world.hpp"
#include <vector>
#include <Corrade/Containers/StringView.h>
#include <Corrade/Utility/Path.h>
namespace Path = Corrade::Utility::Path;
namespace floormat::Serialize {
namespace {
struct interned_atlas final {
const tile_atlas* img;
atlasid index;
};
struct writer_state final {
writer_state(const world& world);
ArrayView<const char> serialize_world();
fm_DECLARE_DEFAULT_MOVE_ASSIGNMENT_(writer_state);
fm_DECLARE_DEPRECATED_COPY_ASSIGNMENT(writer_state);
private:
atlasid intern_atlas(const tile_image& img);
atlasid maybe_intern_atlas(const tile_image& img);
void serialize_chunk(const chunk& c, chunk_coords coord);
void serialize_atlases();
const struct world* world;
std::vector<char> atlas_buf, chunk_buf, file_buf;
std::vector<std::vector<char>> chunk_bufs;
std::unordered_map<const void*, interned_atlas> tile_images;
};
constexpr auto tile_size = sizeof(tilemeta) + sizeof(atlasid)*3;
constexpr auto chunkbuf_size =
sizeof(chunk_magic) + sizeof(chunk_coords) + tile_size * TILE_COUNT;
#ifdef __GNUG__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#endif
writer_state::writer_state(const struct world& world) : world{&world}
{
chunk_buf.reserve(chunkbuf_size);
chunk_bufs.reserve(world.chunks().size());
atlas_buf.reserve(atlas_name_max * 64);
}
#ifdef __GNUG__
#pragma GCC diagnostic pop
#endif
atlasid writer_state::intern_atlas(const tile_image& img)
{
const void* const ptr = img.atlas.get();
fm_debug_assert(ptr != nullptr);
if (auto it = tile_images.find(ptr); it != tile_images.end())
return it->second.index;
else
return (tile_images[ptr] = { &*img.atlas, (atlasid)tile_images.size() }).index;
}
atlasid writer_state::maybe_intern_atlas(const tile_image& img)
{
return img ? intern_atlas(img) : null_atlas;
}
void writer_state::serialize_chunk(const chunk& c, chunk_coords coord)
{
fm_assert(chunk_buf.empty());
chunk_buf.resize(chunkbuf_size);
auto s = binary_writer{chunk_buf.begin()};
s << chunk_magic << coord.x << coord.y;
for (std::size_t i = 0; i < TILE_COUNT; i++)
{
const tile& x = c[i];
[[maybe_unused]] constexpr auto tile_size = sizeof(tilemeta) + (sizeof(atlasid) + sizeof(imgvar))*3;
fm_debug_assert(s.bytes_written() + tile_size <= chunkbuf_size);
auto img_g = maybe_intern_atlas(x.ground_image);
auto img_n = maybe_intern_atlas(x.wall_north);
auto img_w = maybe_intern_atlas(x.wall_north);
tilemeta flags = {};
flags |= meta_ground * (img_g != null_atlas);
flags |= meta_wall_n * (img_n != null_atlas);
flags |= meta_wall_w * (img_w != null_atlas);
fm_debug_assert((x.passability & pass_mask) == x.passability);
flags |= x.passability;
s << flags;
static_assert(std::is_same_v<imgvar, imgvar>);
if (img_g != null_atlas)
s << img_g << x.ground_image.variant;
if (img_n != null_atlas)
s << img_n << x.wall_north.variant;
if (img_w != null_atlas)
s << img_w << x.wall_west.variant;
}
const auto nbytes = s.bytes_written();
fm_assert(nbytes <= chunkbuf_size);
chunk_buf.resize(nbytes);
chunk_bufs.push_back(chunk_buf);
chunk_buf.clear();
}
void writer_state::serialize_atlases()
{
const std::size_t sz = tile_images.size();
fm_assert(sz < int_max<atlasid>);
const auto atlasbuf_size = sizeof(sz) + atlas_name_max*sz;
atlas_buf.resize(atlasbuf_size);
auto s = binary_writer{atlas_buf.begin()};
fm_assert(sz <= int_max<atlasid>);
s << sz;
for (const auto& [p, t] : tile_images)
{
const auto& [atlas, index] = t;
const auto name = atlas->name();
const auto namesiz = name.size();
fm_debug_assert(s.bytes_written() + namesiz + 1 <= atlasbuf_size);
fm_assert(namesiz <= atlas_name_max - 1); // null terminated
fm_debug_assert(name.find('\0') == name.cend());
s.write_asciiz_string(name);
}
fm_assert(s.bytes_written() <= atlasbuf_size);
}
#ifdef __GNUG__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#endif
ArrayView<const char> writer_state::serialize_world()
{
for (const auto& [pos, c] : world->chunks())
{
#ifndef FM_NO_DEBUG
if (c.empty(true))
fm_warn("chunk %hd:%hd is empty", pos.x, pos.y);
#endif
serialize_chunk(c, pos);
}
serialize_atlases();
std::size_t len = 0;
len += std::size(file_magic)-1;
len += sizeof(proto_version);
for (const auto& buf : chunk_bufs)
len += buf.size();
len += atlas_buf.size();
file_buf.resize(len);
auto it = file_buf.begin();
const auto copy = [&](const auto& in) {
#ifndef FM_NO_DEBUG
auto len1 = std::distance(std::cbegin(in), std::cend(in)),
len2 = std::distance(it, file_buf.end());
fm_assert(len1 <= len2);
#endif
it = std::copy(std::cbegin(in), std::cend(in), it);
};
copy(Containers::StringView{file_magic, std::size(file_magic)-1});
copy(std::initializer_list<char>{ char(proto_version & 0xff), char((proto_version >> 8) & 0xff) });
copy(atlas_buf);
for (const auto& buf : chunk_bufs)
copy(buf);
return {file_buf.data(), file_buf.size()};
}
#ifdef __GNUG__
#pragma GCC diagnostic pop
#endif
} // namespace
} // namespace floormat::Serialize
namespace floormat {
void world::serialize(StringView filename)
{
collect(true);
char errbuf[128];
constexpr auto strerror = []<std::size_t N> (char (&buf)[N]) -> const char* {
::strerror_s(buf, std::size(buf), errno);
return buf;
};
fm_assert(filename.flags() & StringViewFlag::NullTerminated);
if (Path::exists(filename))
Path::remove(filename);
FILE_raii file = ::fopen(filename.data(), "w");
if (!file)
fm_abort("fopen(\"%s\", \"w\"): %s", filename.data(), strerror(errbuf));
Serialize::writer_state s{*this};
const auto array = s.serialize_world();
if (auto len = ::fwrite(array.data(), array.size(), 1, file); len != 1)
fm_abort("fwrite: %s", strerror(errbuf));
if (int ret = ::fflush(file); ret != 0)
fm_abort("fflush: %s", strerror(errbuf));
}
} // namespace floormat
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