#include <stdlib.h>
#include <grass/gis.h>

Include dependency graph for quant.c:

Macros
#define	USE_LOOKUP 1

#define	MAX_LOOKUP_TABLE_SIZE 2048

#define	NO_DATA (G_set_c_null_value (&tmp, 1), (CELL) tmp)

#define	MIN(a, b) ((a) < (b) ? (a) : (b))

#define	MAX(a, b) ((a) > (b) ? (a) : (b))

#define	NO_LEFT_INFINITE_RULE (! q->infiniteLeftSet)

#define	NO_RIGHT_INFINITE_RULE (! q->infiniteRightSet)

#define	NO_FINITE_RULE (q->nofRules <= 0)

#define	NO_EXPLICIT_RULE

Functions
void	G_quant_clear (struct Quant *q)

void	G_quant_free (struct Quant *q)

int	G__quant_organize_fp_lookup (struct Quant *q)

int	G_quant_init (struct Quant *quant)
	Initializes the q struct. More...

int	G_quant_is_truncate (const struct Quant *quant)

int	G_quant_is_round (const struct Quant *quant)

int	G_quant_truncate (struct Quant *quant)
	sets the quant for q rules to perform simple truncation on floats. More...

int	G_quant_round (struct Quant *quant)

int	G_quant_get_limits (const struct Quant q, DCELL dMin, DCELL dMax, CELL cMin, CELL *cMax)
	Extracts the minimum and maximum floating-point and integer values from all the rules (except the `"infinite"` rules) in q into dmin, dmax, cmin, and cmax. Returns 1 if there are any explicit rules. If there are no explicit rules, (this includes cases when q is set to truncate or round map), it returns 0 and sets dmin, dmax, cmin, and cmax to NULL. More...

int	G_quant_nof_rules (const struct Quant *q)

void	G_quant_get_ith_rule (const struct Quant q, int i, DCELL dLow, DCELL dHigh, CELL cLow, CELL *cHigh)

void	G_quant_set_neg_infinite_rule (struct Quant *q, DCELL dLeft, CELL c)

int	G_quant_get_neg_infinite_rule (const struct Quant q, DCELL dLeft, CELL *c)

void	G_quant_set_pos_infinite_rule (struct Quant *q, DCELL dRight, CELL c)

int	G_quant_get_pos_infinite_rule (const struct Quant q, DCELL dRight, CELL *c)

void	G_quant_add_rule (struct Quant *q, DCELL dLow, DCELL dHigh, CELL cLow, CELL cHigh)

void	G_quant_reverse_rule_order (struct Quant *q)

CELL	G_quant_get_cell_value (struct Quant *q, DCELL dcellVal)
	Returns a CELL category for the floating-point value based on the quantization rules in q. The first rule found that applies is used. The rules are searched in the reverse order they are added to q. If no rule is found, the value is first tested against the negative infinite rule, and finally against the positive infinite rule. if none of these rules apply, the NULL-value is returned. NOTE. See G_quant_organize_fp_lookup() for details on how the values are looked up from fp_lookup table when it is active. (Right now fp_lookup is automatically organized during the first call to G_quant_get_cell_value() More...

void	G_quant_perform_d (struct Quant q, const DCELL dcell, CELL *cell, int n)

void	G_quant_perform_f (struct Quant q, const FCELL fcell, CELL *cell, int n)

struct Quant_table *	G__quant_get_rule_for_d_raster_val (const struct Quant *q, DCELL val)

Macro Definition Documentation

#define MAX	(	a,
		b
	)	((a) > (b) ? (a) : (b))

Definition at line 298 of file quant.c.

#define MAX_LOOKUP_TABLE_SIZE 2048

Definition at line 292 of file quant.c.

Referenced by G__quant_organize_fp_lookup().

#define MIN	(	a,
		b
	)	((a) < (b) ? (a) : (b))

Definition at line 297 of file quant.c.

#define NO_DATA (G_set_c_null_value (&tmp, 1), (CELL) tmp)

Definition at line 293 of file quant.c.

Referenced by G__quant_organize_fp_lookup(), and G_quant_get_cell_value().

#define NO_EXPLICIT_RULE

Value:

(NO_FINITE_RULE && \

NO_LEFT_INFINITE_RULE && NO_RIGHT_INFINITE_RULE)

NO_RIGHT_INFINITE_RULE

#define NO_RIGHT_INFINITE_RULE

Definition: quant.c:301

NO_LEFT_INFINITE_RULE

#define NO_LEFT_INFINITE_RULE

Definition: quant.c:300

NO_FINITE_RULE

#define NO_FINITE_RULE

Definition: quant.c:302

Definition at line 303 of file quant.c.

Referenced by G_quant_get_cell_value(), and G_quant_get_limits().

#define NO_FINITE_RULE (q->nofRules <= 0)

Definition at line 302 of file quant.c.

Referenced by G__quant_organize_fp_lookup(), and G_quant_get_cell_value().

#define NO_LEFT_INFINITE_RULE (! q->infiniteLeftSet)

Definition at line 300 of file quant.c.

Referenced by G__quant_organize_fp_lookup(), and G_quant_get_cell_value().

#define NO_RIGHT_INFINITE_RULE (! q->infiniteRightSet)

Definition at line 301 of file quant.c.

Referenced by G__quant_organize_fp_lookup(), and G_quant_get_cell_value().

#define USE_LOOKUP 1

Definition at line 291 of file quant.c.

Referenced by G_quant_get_cell_value().

Function Documentation

struct Quant_table* G__quant_get_rule_for_d_raster_val	(	const struct Quant *	q,
		DCELL	val
	)

Definition at line 929 of file quant.c.

References NULL.

Referenced by G__quant_organize_fp_lookup(), and G_quant_get_cell_value().

int G__quant_organize_fp_lookup ( struct Quant * q )

Definition at line 333 of file quant.c.

References G__quant_get_rule_for_d_raster_val(), MAX_LOOKUP_TABLE_SIZE, NO_DATA, NO_FINITE_RULE, NO_LEFT_INFINITE_RULE, and NO_RIGHT_INFINITE_RULE.

Referenced by G_quant_get_cell_value().

void G_quant_add_rule	(	struct Quant *	q,
		DCELL	dLow,
		DCELL	dHigh,
		CELL	cLow,
		CELL	cHigh
	)

Definition at line 655 of file quant.c.

References G_free().

Referenced by G_quantize_fp_map_range(), G_set_d_raster_cat(), and G_set_quant_rules().

void G_quant_clear ( struct Quant * q )

Definition at line 308 of file quant.c.

Referenced by G_quant_free(), and G_quant_init().

void G_quant_free ( struct Quant * q )

Definition at line 316 of file quant.c.

References G_free(), and G_quant_clear().

Referenced by G__quant_import(), and G_free_raster_cats().

CELL G_quant_get_cell_value	(	struct Quant *	q,
		DCELL	dcellVal
	)

Returns a CELL category for the floating-point value based on the quantization rules in q. The first rule found that applies is used. The rules are searched in the reverse order they are added to q. If no rule is found, the value is first tested against the negative infinite rule, and finally against the positive infinite rule. if none of these rules apply, the NULL-value is returned. NOTE. See G_quant_organize_fp_lookup() for details on how the values are looked up from fp_lookup table when it is active. (Right now fp_lookup is automatically organized during the first call to G_quant_get_cell_value()

Parameters

q
value

Returns: CELL

Definition at line 775 of file quant.c.

References G__quant_get_rule_for_d_raster_val(), G__quant_organize_fp_lookup(), G_is_d_null_value(), int, NO_DATA, NO_EXPLICIT_RULE, NO_FINITE_RULE, NO_LEFT_INFINITE_RULE, NO_RIGHT_INFINITE_RULE, and USE_LOOKUP.

Referenced by G_get_raster_cat(), G_mark_raster_cats(), G_quant_perform_d(), and G_quant_perform_f().

void G_quant_get_ith_rule	(	const struct Quant *	q,
		int	i,
		DCELL *	dLow,
		DCELL *	dHigh,
		CELL *	cLow,
		CELL *	cHigh
	)

Definition at line 562 of file quant.c.

Referenced by E_edit_fp_cats(), and G_get_ith_d_raster_cat().

int G_quant_get_limits	(	const struct Quant *	q,
		DCELL *	dMin,
		DCELL *	dMax,
		CELL *	cMin,
		CELL *	cMax
	)

Extracts the minimum and maximum floating-point and integer values from all the rules (except the "infinite" rules) in q into dmin, dmax, cmin, and cmax. Returns 1 if there are any explicit rules. If there are no explicit rules, (this includes cases when q is set to truncate or round map), it returns 0 and sets dmin, dmax, cmin, and cmax to NULL.

Parameters