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
|
#include <mbgl/map/tile_parser.hpp>
#include <mbgl/map/vector_tile_data.hpp>
#include <mbgl/style/style.hpp>
#include <mbgl/style/style_layer.hpp>
#include <mbgl/style/style_layer_group.hpp>
#include <mbgl/renderer/fill_bucket.hpp>
#include <mbgl/renderer/line_bucket.hpp>
#include <mbgl/renderer/symbol_bucket.hpp>
#include <mbgl/renderer/raster_bucket.hpp>
#include <mbgl/util/raster.hpp>
#include <mbgl/util/constants.hpp>
#include <mbgl/util/token.hpp>
#include <mbgl/geometry/glyph_atlas.hpp>
#include <mbgl/text/glyph_store.hpp>
#include <mbgl/text/collision.hpp>
#include <mbgl/text/glyph.hpp>
#include <mbgl/map/map.hpp>
#include <mbgl/util/std.hpp>
#include <mbgl/util/utf.hpp>
#include <locale>
namespace mbgl {
// Note: This destructor is seemingly empty, but we need to declare it anyway
// because this object has a std::unique_ptr<> of a forward-declare type in
// its header file.
TileParser::~TileParser() = default;
TileParser::TileParser(const std::string &data, VectorTileData &tile_,
const util::ptr<const Style> &style_,
GlyphAtlas & glyphAtlas_,
GlyphStore & glyphStore_,
SpriteAtlas & spriteAtlas_,
const util::ptr<Sprite> &sprite_,
TexturePool& texturePool_)
: vector_data(pbf((const uint8_t *)data.data(), data.size())),
tile(tile_),
style(style_),
glyphAtlas(glyphAtlas_),
glyphStore(glyphStore_),
spriteAtlas(spriteAtlas_),
sprite(sprite_),
texturePool(texturePool_),
collision(util::make_unique<Collision>(tile.id.z, 4096, tile.source.tile_size, tile.depth)) {
assert(&tile != nullptr);
assert(style);
assert(sprite);
assert(collision);
}
void TileParser::parse() {
parseStyleLayers(style->layers);
}
bool TileParser::obsolete() const { return tile.state == TileData::State::obsolete; }
void TileParser::parseStyleLayers(util::ptr<StyleLayerGroup> group) {
if (!group) {
return;
}
for (const util::ptr<StyleLayer> &layer_desc : group->layers) {
// Cancel early when parsing.
if (obsolete()) {
return;
}
if (layer_desc->isBackground()) {
// background is a special, fake bucket
continue;
} else if (layer_desc->layers) {
// This is a layer group.
parseStyleLayers(layer_desc->layers);
}
if (layer_desc->bucket) {
// This is a singular layer. Check if this bucket already exists. If not,
// parse this bucket.
auto bucket_it = tile.buckets.find(layer_desc->bucket->name);
if (bucket_it == tile.buckets.end()) {
// We need to create this bucket since it doesn't exist yet.
std::unique_ptr<Bucket> bucket = createBucket(layer_desc->bucket);
if (bucket) {
// Bucket creation might fail because the data tile may not
// contain any data that falls into this bucket.
tile.buckets[layer_desc->bucket->name] = std::move(bucket);
}
}
} else {
fprintf(stderr, "[WARNING] layer '%s' does not have child layers or buckets\n", layer_desc->id.c_str());
}
}
}
std::unique_ptr<Bucket> TileParser::createBucket(util::ptr<StyleBucket> bucket_desc) {
if (!bucket_desc) {
fprintf(stderr, "missing bucket desc\n");
return nullptr;
}
// Skip this bucket if we are to not render this
if (tile.id.z < std::floor(bucket_desc->min_zoom) && std::floor(bucket_desc->min_zoom) < tile.source.max_zoom) return nullptr;
if (tile.id.z >= std::ceil(bucket_desc->max_zoom)) return nullptr;
auto layer_it = vector_data.layers.find(bucket_desc->source_layer);
if (layer_it != vector_data.layers.end()) {
const VectorTileLayer &layer = layer_it->second;
if (bucket_desc->render.is<StyleBucketFill>()) {
return createFillBucket(layer, bucket_desc->filter, bucket_desc->render.get<StyleBucketFill>());
} else if (bucket_desc->render.is<StyleBucketLine>()) {
return createLineBucket(layer, bucket_desc->filter, bucket_desc->render.get<StyleBucketLine>());
} else if (bucket_desc->render.is<StyleBucketSymbol>()) {
return createSymbolBucket(layer, bucket_desc->filter, bucket_desc->render.get<StyleBucketSymbol>());
} else if (bucket_desc->render.is<StyleBucketRaster>()) {
return nullptr;
} else {
fprintf(stderr, "[WARNING] unknown bucket render type for layer '%s' (source layer '%s')\n", bucket_desc->name.c_str(), bucket_desc->source_layer.c_str());
}
} else if (bucket_desc->render.is<StyleBucketRaster>() && bucket_desc->render.get<StyleBucketRaster>().prerendered == true) {
return createRasterBucket(bucket_desc->render.get<StyleBucketRaster>());
} else {
// The layer specified in the bucket does not exist. Do nothing.
if (debug::tileParseWarnings) {
fprintf(stderr, "[WARNING] layer '%s' does not exist in tile %d/%d/%d\n",
bucket_desc->source_layer.c_str(), tile.id.z, tile.id.x, tile.id.y);
}
}
return nullptr;
}
template <class Bucket>
void TileParser::addBucketGeometries(Bucket& bucket, const VectorTileLayer& layer, const FilterExpression &filter) {
FilteredVectorTileLayer filtered_layer(layer, filter);
for (pbf feature : filtered_layer) {
if (obsolete())
return;
while (feature.next(4)) { // geometry
pbf geometry_pbf = feature.message();
if (geometry_pbf) {
bucket->addGeometry(geometry_pbf);
} else if (debug::tileParseWarnings) {
fprintf(stderr, "[WARNING] geometry is empty\n");
}
}
}
}
std::unique_ptr<Bucket> TileParser::createFillBucket(const VectorTileLayer& layer, const FilterExpression &filter, const StyleBucketFill &fill) {
std::unique_ptr<FillBucket> bucket = util::make_unique<FillBucket>(tile.fillVertexBuffer, tile.triangleElementsBuffer, tile.lineElementsBuffer, fill);
addBucketGeometries(bucket, layer, filter);
return obsolete() ? nullptr : std::move(bucket);
}
std::unique_ptr<Bucket> TileParser::createRasterBucket(const StyleBucketRaster &raster) {
std::unique_ptr<RasterBucket> bucket = util::make_unique<RasterBucket>(texturePool, raster);
return obsolete() ? nullptr : std::move(bucket);
}
std::unique_ptr<Bucket> TileParser::createLineBucket(const VectorTileLayer& layer, const FilterExpression &filter, const StyleBucketLine &line) {
std::unique_ptr<LineBucket> bucket = util::make_unique<LineBucket>(tile.lineVertexBuffer, tile.triangleElementsBuffer, tile.pointElementsBuffer, line);
addBucketGeometries(bucket, layer, filter);
return obsolete() ? nullptr : std::move(bucket);
}
std::unique_ptr<Bucket> TileParser::createSymbolBucket(const VectorTileLayer& layer, const FilterExpression &filter, const StyleBucketSymbol &symbol) {
std::unique_ptr<SymbolBucket> bucket = util::make_unique<SymbolBucket>(symbol, *collision);
bucket->addFeatures(layer, filter, tile.id, spriteAtlas, *sprite, glyphAtlas, glyphStore);
return obsolete() ? nullptr : std::move(bucket);
}
}
|
