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Allow filtering features by zoom level in conditional expressions

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This moves filtering from the serialization stage to the
tiling stage so that the zoom level can be known to the filter.

The side effect is to carry null attributes much further through
the pipeline than previously.
This commit is contained in:
Eric Fischer
2018-04-05 14:15:19 -07:00
parent 6b29966e4a
commit d01d8177a0
15 changed files with 13698 additions and 57 deletions
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tile.hpp
+2 -1
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@@ -7,6 +7,7 @@
#include <atomic>
#include <map>
#include "mbtiles.hpp"
#include "jsonpull/jsonpull.h"
enum attribute_op {
op_sum,
@@ -20,7 +21,7 @@ enum attribute_op {
long long write_tile(char **geom, char *metabase, char *stringpool, unsigned *file_bbox, int z, unsigned x, unsigned y, int detail, int min_detail, int basezoom, sqlite3 *outdb, const char *outdir, double droprate, int buffer, const char *fname, FILE **geomfile, int file_minzoom, int file_maxzoom, double todo, char *geomstart, long long along, double gamma, int nlayers);
int traverse_zooms(int *geomfd, off_t *geom_size, char *metabase, char *stringpool, std::atomic<unsigned> *midx, std::atomic<unsigned> *midy, int &maxzoom, int minzoom, sqlite3 *outdb, const char *outdir, int buffer, const char *fname, const char *tmpdir, double gamma, int full_detail, int low_detail, int min_detail, long long *meta_off, long long *pool_off, unsigned *initial_x, unsigned *initial_y, double simplification, std::vector<std::map<std::string, layermap_entry> > &layermap, const char *prefilter, const char *postfilter, std::map<std::string, attribute_op> const *attribute_accum);
int traverse_zooms(int *geomfd, off_t *geom_size, char *metabase, char *stringpool, std::atomic<unsigned> *midx, std::atomic<unsigned> *midy, int &maxzoom, int minzoom, sqlite3 *outdb, const char *outdir, int buffer, const char *fname, const char *tmpdir, double gamma, int full_detail, int low_detail, int min_detail, long long *meta_off, long long *pool_off, unsigned *initial_x, unsigned *initial_y, double simplification, std::vector<std::map<std::string, layermap_entry> > &layermap, const char *prefilter, const char *postfilter, std::map<std::string, attribute_op> const *attribute_accum, struct json_object *filter);
int manage_gap(unsigned long long index, unsigned long long *previndex, double scale, double gamma, double *gap);