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
|
#include <llmr/map/tile.hpp>
#include <llmr/style/style.hpp>
#include <llmr/map/vector_tile.hpp>
#include <llmr/geometry/fill_buffer.hpp>
#include <llmr/geometry/line_buffer.hpp>
#include <llmr/renderer/fill_bucket.hpp>
#include <llmr/renderer/line_bucket.hpp>
#include <llmr/platform/platform.hpp>
#include <llmr/util/pbf.hpp>
#include <llmr/util/string.hpp>
using namespace llmr;
Tile::ID Tile::parent(const ID& id, int32_t z) {
assert(z < id.z);
ID pos(id);
while (pos.z > z) {
--pos.z;
pos.x = floor(pos.x / 2);
pos.y = floor(pos.y / 2);
}
return pos;
}
std::forward_list<Tile::ID> Tile::children(const ID& id, int32_t z) {
assert(z > id.z);
int32_t factor = pow(2, z - id.z);
std::forward_list<ID> children;
for (int32_t y = id.y * factor, y_max = (id.y + 1) * factor; y < y_max; ++y) {
for (int32_t x = id.x * factor, x_max = (id.x + 1) * factor; x < x_max; ++x) {
children.emplace_front(x, y, z);
}
}
return children;
}
Tile::Tile(ID id, const Style& style)
: id(id),
state(initial),
fillVertexBuffer(std::make_shared<FillVertexBuffer>()),
fillElementsBuffer(std::make_shared<FillElementsBuffer>()),
lineBuffer(std::make_shared<LineBuffer>()),
style(style) {
// Initialize tile debug coordinates
char coord[32];
snprintf(coord, sizeof(coord), "%d/%d/%d", id.z, id.x, id.y);
debugFontBuffer.addText(coord, 50, 200, 5);
}
Tile::~Tile() {
}
const std::string Tile::toString() const {
return util::sprintf("[tile %d/%d/%d]", id.z, id.x, id.y);
}
void Tile::request() {
state = Tile::loading;
// Create http request
std::string url = util::sprintf(kTileURL,
id.z, id.x, id.y);
// Note: Somehow this feels slower than the change to request_http()
std::shared_ptr<Tile> tile = shared_from_this();
platform::request_http(url, [=](platform::Response& res) {
if (res.code == 200) {
tile->data.swap(res.body);
tile->parse();
} else {
fprintf(stderr, "tile loading failed\n");
}
}, []() {
// TODO: Make sure this gets passed the correct map ID/pointer.
platform::restart(nullptr);
});
}
void Tile::cancel() {
// TODO: thread safety
if (state != obsolete) {
state = obsolete;
} else {
assert((!"logic error? multiple cancelleations"));
}
}
bool Tile::parse() {
// std::lock_guard<std::mutex> lock(mtx);
if (state == obsolete) {
return false;
}
try {
VectorTile tile(pbf((const uint8_t *)data.data(), data.size()));
parseStyleLayers(tile, style.layers);
} catch (const std::exception& ex) {
fprintf(stderr, "[%p] exception [%d/%d/%d]... failed: %s\n", this, id.z, id.x, id.y, ex.what());
cancel();
return false;
}
if (state == obsolete) {
return false;
} else {
state = ready;
}
return true;
}
void Tile::parseStyleLayers(const VectorTile& tile, const std::vector<LayerDescription>& layers) {
for (const LayerDescription& layer_desc : layers) {
if (layer_desc.child_layer.size()) {
// This is a layer group.
// TODO: create framebuffer
parseStyleLayers(tile, layer_desc.child_layer);
// TODO: render framebuffer on previous framebuffer
} else {
// This is a singular layer. Check if this bucket already exists. If not,
// parse this bucket.
auto bucket_it = buckets.find(layer_desc.bucket_name);
if (bucket_it == buckets.end()) {
auto bucket_it = style.buckets.find(layer_desc.bucket_name);
if (bucket_it != style.buckets.end()) {
// Only create the new bucket if we have an actual specification
// for it.
std::shared_ptr<Bucket> bucket = createBucket(tile, bucket_it->second);
if (bucket) {
// Bucket creation might fail because the data tile may not
// contain any data that falls into this bucket.
buckets[layer_desc.bucket_name] = bucket;
}
} else {
// There is no proper specification for this bucket, even though
// it is referenced in the stylesheet.
fprintf(stderr, "Stylesheet specifies bucket %s, but it is not defined\n", layer_desc.bucket_name.c_str());
}
}
}
}
}
std::shared_ptr<Bucket> Tile::createBucket(const VectorTile& tile, const BucketDescription& bucket_desc) {
auto layer_it = tile.layers.find(bucket_desc.source_layer);
if (layer_it != tile.layers.end()) {
const VectorTileLayer& layer = layer_it->second;
if (bucket_desc.type == BucketType::Fill) {
return createFillBucket(layer, bucket_desc);
} else if (bucket_desc.type == BucketType::Line) {
return createLineBucket(layer, bucket_desc);
} else {
// TODO: create other bucket types.
}
} else {
// The layer specified in the bucket does not exist. Do nothing.
}
return nullptr;
}
std::shared_ptr<Bucket> Tile::createFillBucket(const VectorTileLayer& layer, const BucketDescription& bucket_desc) {
std::shared_ptr<FillBucket> bucket = std::make_shared<FillBucket>(fillVertexBuffer, fillElementsBuffer, bucket_desc);
FilteredVectorTileLayer filtered_layer(layer, bucket_desc);
for (pbf feature : filtered_layer) {
while (feature.next(4)) { // geometry
pbf geometry_pbf = feature.message();
if (geometry_pbf) {
bucket->addGeometry(geometry_pbf);
}
}
}
return bucket;
}
std::shared_ptr<Bucket> Tile::createLineBucket(const VectorTileLayer& layer, const BucketDescription& bucket_desc) {
std::shared_ptr<LineBucket> bucket = std::make_shared<LineBucket>(lineBuffer, bucket_desc);
FilteredVectorTileLayer filtered_layer(layer, bucket_desc);
for (pbf feature : filtered_layer) {
while (feature.next(4)) { // geometry
pbf geometry_pbf = feature.message();
if (geometry_pbf) {
bucket->addGeometry(geometry_pbf);
}
}
}
return bucket;
}
|
