mvt.c File Reference

#include "mvt.h"
#include "lwgeom_geos.h"
#include "utils/jsonb.h"
#include "uthash.h"

Include dependency graph for mvt.c:

Go to the source code of this file.

Data Structures
struct	mvt_kv_key
struct	mvt_kv_string_value
struct	mvt_kv_float_value
struct	mvt_kv_double_value
struct	mvt_kv_uint_value
struct	mvt_kv_sint_value
struct	mvt_kv_bool_value

Macros
#define	DatumGetJsonbP   DatumGetJsonb
#define	FEATURES_CAPACITY_INITIAL   50
#define	MVT_CREATE_VALUES(kvtype, hash, hasfield, valuefield)
#define	MVT_PARSE_VALUE(value, kvtype, hash, valuefield, size)
#define	MVT_PARSE_INT_VALUE(value)
#define	MVT_PARSE_DATUM(type, kvtype, hash, valuefield, datumfunc, size)
#define	MVT_PARSE_INT_DATUM(type, datumfunc)

Enumerations
enum	mvt_cmd_id { CMD_MOVE_TO = 1 , CMD_LINE_TO = 2 , CMD_CLOSE_PATH = 7 }
enum	mvt_type { MVT_POINT = 1 , MVT_LINE = 2 , MVT_RING = 3 }

Functions
static uint32_t	c_int (enum mvt_cmd_id id, uint32_t count)
static uint32_t	p_int (int32_t value)
static uint32_t	encode_ptarray (__attribute__((__unused__)) mvt_agg_context *ctx, enum mvt_type type, POINTARRAY *pa, uint32_t *buffer, int32_t *px, int32_t *py)
static uint32_t	encode_ptarray_initial (mvt_agg_context *ctx, enum mvt_type type, POINTARRAY *pa, uint32_t *buffer)
static void	encode_point (mvt_agg_context *ctx, LWPOINT *point)
static void	encode_mpoint (mvt_agg_context *ctx, LWMPOINT *mpoint)
static void	encode_line (mvt_agg_context *ctx, LWLINE *lwline)
static void	encode_mline (mvt_agg_context *ctx, LWMLINE *lwmline)
static void	encode_poly (mvt_agg_context *ctx, LWPOLY *lwpoly)
static void	encode_mpoly (mvt_agg_context *ctx, LWMPOLY *lwmpoly)
static void	encode_geometry (mvt_agg_context *ctx, LWGEOM *lwgeom)
static TupleDesc	get_tuple_desc (mvt_agg_context *ctx)
static uint32_t	get_key_index_with_size (mvt_agg_context *ctx, const char *name, size_t size)
static uint32_t	add_key (mvt_agg_context *ctx, char *name)
static void	parse_column_keys (mvt_agg_context *ctx)
static void	encode_keys (mvt_agg_context *ctx)
static VectorTile__Tile__Value *	create_value ()
static void	encode_values (mvt_agg_context *ctx)
static void	add_value_as_string_with_size (mvt_agg_context *ctx, char *value, size_t size, uint32_t *tags, uint32_t k)
static void	add_value_as_string (mvt_agg_context *ctx, char *value, uint32_t *tags, uint32_t k)
static void	parse_datum_as_string (mvt_agg_context *ctx, Oid typoid, Datum datum, uint32_t *tags, uint32_t k)
static uint32_t *	parse_jsonb (mvt_agg_context *ctx, Jsonb *jb, uint32_t *tags)
static void	parse_values (mvt_agg_context *ctx)
static uint8	lwgeom_get_basic_type (LWGEOM *geom)
static LWGEOM *	lwgeom_to_basic_type (LWGEOM *geom, uint8 original_type)
	In place process a collection to find a concrete geometry object and expose that as the actual object. More...
static LWGEOM *	mvt_unsafe_clip_by_box (LWGEOM *lwg_in, GBOX *clip_box)
static LWGEOM *	mvt_safe_clip_polygon_by_box (LWGEOM *lwg_in, GBOX *clip_box)
	Clips an input geometry using GEOSIntersection It used to try to use GEOSClipByRect (as mvt_unsafe_clip_by_box) but since that produces invalid output when an invalid geometry is given and detecting it resulted to be impossible, we use intersection instead and, upon error, force validation of the input and retry. More...
static LWGEOM *	mvt_iterate_clip_by_box_geos (LWGEOM *lwgeom, GBOX *clip_gbox, uint8_t basic_type)
	Clips the geometry using GEOSIntersection in a "safe way", cleaning the input if necessary and clipping MULTIPOLYGONs separately to reduce the impact of using invalid input in GEOS Might return NULL. More...
static LWGEOM *	mvt_grid_and_validate_geos (LWGEOM *ng, uint8_t basic_type)
	Given a geometry, it uses GEOS operations to make sure that it's valid according to the MVT spec and that all points are snapped into int coordinates It iterates several times if needed, if it fails, returns NULL. More...
static LWGEOM *	mvt_clip_and_validate_geos (LWGEOM *lwgeom, uint8_t basic_type, uint32_t extent, uint32_t buffer, bool clip_geom)
LWGEOM *	mvt_geom (LWGEOM *lwgeom, const GBOX *gbox, uint32_t extent, uint32_t buffer, bool clip_geom)
	Transform a geometry into vector tile coordinate space. More...
void	mvt_agg_init_context (mvt_agg_context *ctx)
	Initialize aggregation context. More...
void	mvt_agg_transfn (mvt_agg_context *ctx)
	Aggregation step. More...
static VectorTile__Tile *	mvt_ctx_to_tile (mvt_agg_context *ctx)
static bytea *	mvt_ctx_to_bytea (mvt_agg_context *ctx)
bytea *	mvt_ctx_serialize (mvt_agg_context *ctx)
static void *	mvt_allocator (__attribute__((__unused__)) void *data, size_t size)
static void	mvt_deallocator (__attribute__((__unused__)) void *data, void *ptr)
mvt_agg_context *	mvt_ctx_deserialize (const bytea *ba)
static VectorTile__Tile__Value *	tile_value_copy (const VectorTile__Tile__Value *value)
static VectorTile__Tile__Feature *	tile_feature_copy (const VectorTile__Tile__Feature *feature, int key_offset, int value_offset)
static VectorTile__Tile__Layer *	vectortile_layer_combine (const VectorTile__Tile__Layer *layer1, const VectorTile__Tile__Layer *layer2)
static VectorTile__Tile *	vectortile_tile_combine (VectorTile__Tile *tile1, VectorTile__Tile *tile2)
mvt_agg_context *	mvt_ctx_combine (mvt_agg_context *ctx1, mvt_agg_context *ctx2)
bytea *	mvt_agg_finalfn (mvt_agg_context *ctx)
	Finalize aggregation. More...