1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
|
#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 (sc.frame.active)
sc.frame.delta << s;
}
t.scenery() = sc;
}
switch (auto x = pass_mode(flags & pass_mask))
{
case pass_mode::shoot_through:
case pass_mode::blocked:
case pass_mode::pass:
t.passability() = x;
break;
default: [[unlikely]]
fm_throw("bad pass mode '{}' for tile {}"_cf, i, pass_mode_(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_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
|
