Raster Library - Read and parse color rules file. More...

#include <stdio.h>
#include <grass/gis.h>
#include <grass/colors.h>
#include <grass/raster.h>
#include <grass/glocale.h>

Include dependency graph for raster/color_rules.c:

Go to the source code of this file.

Enumerations
enum	rule_error { CR_OK = 0 , CR_ERROR_RULE_SYNTAX , CR_ERROR_COLOR_SYNTAX , CR_ERROR_PERCENT , CR_ERROR_VALUE }

Functions
int	Rast_parse_color_rule (DCELL min, DCELL max, const char buf, DCELL val, int r, int g, int b, int norm, int nval, int dflt)
	Read color rule.

const char *	Rast_parse_color_rule_error (int code)
	Parse color rule.

int	Rast_read_color_rule (void closure, DCELL min, DCELL max, DCELL val, int r, int g, int b, int norm, int nval, int dflt)
	Read color rule.

int	Rast_read_color_rules (struct Colors colors, DCELL min, DCELL max, read_rule_fn read_rule, void *closure)
	Read color rules from file.

int	Rast_load_colors (struct Colors colors, const char path, CELL min, CELL max)
	Load color rules from file.

int	Rast_load_fp_colors (struct Colors colors, const char path, DCELL min, DCELL max)
	Load color floating-point rules from file.

void	Rast_make_colors (struct Colors colors, const char name, CELL min, CELL max)
	Load color rules from predefined color table.

void	Rast_make_fp_colors (struct Colors colors, const char name, DCELL min, DCELL max)
	Load color rules from predefined floating-point color table.

Detailed Description

Raster Library - Read and parse color rules file.

This program is free software under the GNU General Public License (>=v2). Read the file COPYING that comes with GRASS for details.

Author: Glynn Clements

Definition in file raster/color_rules.c.

Enumeration Type Documentation

◆ rule_error

enum rule_error

Enumerator
CR_OK
CR_ERROR_RULE_SYNTAX
CR_ERROR_COLOR_SYNTAX
CR_ERROR_PERCENT
CR_ERROR_VALUE

Definition at line 28 of file raster/color_rules.c.

Function Documentation

◆ Rast_load_colors()

int Rast_load_colors	(	struct Colors *	colors,
		const char *	path,
		CELL	min,
		CELL	max
	)

Load color rules from file.

Parameters

[out]	colors	pointer to Colors structure
	path	path to the color rules file
	min,max	min & max values (used only when color rules are in percentage)

Returns: 0 on failure; 1 on success

Definition at line 293 of file raster/color_rules.c.

References max, and min.

◆ Rast_load_fp_colors()

int Rast_load_fp_colors	(	struct Colors *	colors,
		const char *	path,
		DCELL	min,
		DCELL	max
	)

Load color floating-point rules from file.

Parameters

[out]	colors	pointer to Colors structure
	path	path to the color rules file
	min,max	min & max values (used only when color rules are in percentage)

Returns: 0 on failure; 1 on success

Definition at line 310 of file raster/color_rules.c.

References max, and min.

◆ Rast_make_colors()

void Rast_make_colors	(	struct Colors *	colors,
		const char *	name,
		CELL	min,
		CELL	max
	)

Load color rules from predefined color table.

Parameters

[out]	colors	pointer to Colors structure
	name	name of color table to load
	min,max	min & max values (used only when color rules are in percentage)

Definition at line 335 of file raster/color_rules.c.

References max, min, and name.

Referenced by Rast_make_aspect_colors(), Rast_make_bgyr_colors(), Rast_make_byg_colors(), Rast_make_byr_colors(), Rast_make_grey_scale_colors(), Rast_make_gyr_colors(), Rast_make_rainbow_colors(), Rast_make_ramp_colors(), Rast_make_ryg_colors(), Rast_make_wave_colors(), and Rast_read_colors().

◆ Rast_make_fp_colors()

void Rast_make_fp_colors	(	struct Colors *	colors,
		const char *	name,
		DCELL	min,
		DCELL	max
	)

Load color rules from predefined floating-point color table.

Parameters

[out]	colors	pointer to Colors structure
	name	name of color table to load
	min,max	min & max values (used only when color rules are in percentage)

Definition at line 349 of file raster/color_rules.c.

References max, min, and name.

Referenced by Rast3d_read_colors(), Rast_make_aspect_fp_colors(), Rast_make_bgyr_fp_colors(), Rast_make_byg_fp_colors(), Rast_make_byr_fp_colors(), Rast_make_grey_scale_fp_colors(), Rast_make_gyr_fp_colors(), Rast_make_rainbow_fp_colors(), Rast_make_ramp_fp_colors(), Rast_make_ryg_fp_colors(), Rast_make_wave_fp_colors(), and Rast_read_colors().

◆ Rast_parse_color_rule()

int Rast_parse_color_rule	(	DCELL	min,
		DCELL	max,
		const char *	buf,
		DCELL *	val,
		int *	r,
		int *	g,
		int *	b,
		int *	norm,
		int *	nval,
		int *	dflt
	)

Read color rule.

The val output parameter is always an absolute value and is derived from the rule and the min and max values in case the rule is in percents.

Always only one of the norm, nval, and dflt output parameters is set to non-zero value, the others are set to zero.

The return code can be translated to an error message using the Rast_parse_color_rule_error() function.

Parameters

	min,max	min & max values (used only when color rules are in percentage)
	buf	string with the color rule
[out]	val	value which the color is assigned to
[out]	r,g,b	color values
[out]	norm	set to non-zero value if the value and color are set
[out]	nval	set to non-zero value if rule is for null value
[out]	dflt	set to non-zero value if rule specifies the default color

Returns: enum rule_error values (non-zero on failure)

Definition at line 57 of file raster/color_rules.c.

References b, CR_ERROR_COLOR_SYNTAX, CR_ERROR_PERCENT, CR_ERROR_RULE_SYNTAX, CR_ERROR_VALUE, CR_OK, g, G_chop(), G_str_to_color(), G_strcasecmp(), max, min, r, and x.

Referenced by Rast_read_color_rule().

◆ Rast_parse_color_rule_error()

const char * Rast_parse_color_rule_error ( int code )

Parse color rule.

Parameters

code

Returns: pointer to buffer with error message

Definition at line 111 of file raster/color_rules.c.

References _, CR_ERROR_COLOR_SYNTAX, CR_ERROR_PERCENT, CR_ERROR_RULE_SYNTAX, CR_ERROR_VALUE, and CR_OK.

Referenced by Rast_read_color_rule().

◆ Rast_read_color_rule()

int Rast_read_color_rule	(	void *	closure,
		DCELL	min,
		DCELL	max,
		DCELL *	val,
		int *	r,
		int *	g,
		int *	b,
		int *	norm,
		int *	nval,
		int *	dflt
	)

Read color rule.

Parameters

	closure
	min,max	min & max values (used only when color rules are in percentage)
	val	value
[out]	r,g,b	color values
	norm
	nval
	dflt

Returns: 0 on failure; 1 on success

Definition at line 147 of file raster/color_rules.c.

References _, b, g, G_debug(), G_fatal_error(), G_getl2(), G_strip(), max, min, r, Rast_parse_color_rule(), and Rast_parse_color_rule_error().

Referenced by Rast_read_color_rules().

◆ Rast_read_color_rules()

int Rast_read_color_rules	(	struct Colors *	colors,
		DCELL	min,
		DCELL	max,
		read_rule_fn *	read_rule,
		void *	closure
	)

Read color rules from file.

Parameters

[out]	colors	pointer to Colors structure
	min,max	min & max values (used only when color rules are in percentage)
	read_rule	pointer to read_rule_fn structure
	closure

Returns: 0 on failure; 1 on success

Definition at line 191 of file raster/color_rules.c.

References _, b, g, G_fatal_error(), G_free(), G_realloc, max, min, NULL, r, Rast_add_d_color_rule(), Rast_init_colors(), Rast_read_color_rule(), Rast_set_d_color(), Rast_set_default_color(), and Rast_set_null_value_color().

Enumerations

Functions

Detailed Description

Enumeration Type Documentation

◆ rule_error

Function Documentation

◆ Rast_load_colors()

◆ Rast_load_fp_colors()

◆ Rast_make_colors()

◆ Rast_make_fp_colors()

◆ Rast_parse_color_rule()

◆ Rast_parse_color_rule_error()

◆ Rast_read_color_rule()

◆ Rast_read_color_rules()