color_xform.c File Reference

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

Include dependency graph for color_xform.c:

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Functions
int	G_histogram_eq_colors (struct Colors *dst, struct Colors *src, struct Cell_stats *statf)
	make histogram-stretched version of existing color table More...
void	G_histogram_eq_colors_fp (struct Colors *dst, struct Colors *src, struct FP_stats *statf)
	make histogram-stretched version of existing color table (FP version) More...
int	G_log_colors (struct Colors *dst, struct Colors *src, int samples)
	make logarithmically-scaled version of an existing color table More...
int	G_abs_log_colors (struct Colors *dst, struct Colors *src, int samples)
	make logarithmically-scaled version of an existing color table, allowing for signed values More...

Function Documentation

int G_abs_log_colors	(	struct Colors *	dst,
		struct Colors *	src,
		int	samples
	)

make logarithmically-scaled version of an existing color table, allowing for signed values

Parameters

dst
src
samples

Returns

int

Definition at line 259 of file color_xform.c.

References G_add_d_raster_color_rule(), G_get_d_color_range(), G_get_d_raster_color(), G_get_default_color(), G_get_null_value_color(), G_init_colors(), G_set_default_color(), G_set_null_value_color(), wxnviz::log, max, min, and y.

int G_histogram_eq_colors	(	struct Colors *	dst,
		struct Colors *	src,
		struct Cell_stats *	statf
	)

make histogram-stretched version of existing color table

Generates a histogram contrast-stretched color table that goes from the histogram information in the Cell_stats structure statf. (See Raster_Histograms).

Parameters

dst
src
statf

Returns

int

Definition at line 59 of file color_xform.c.

References cat, count, first, G_add_color_rule(), G_get_d_color_range(), G_get_d_raster_color(), G_get_default_color(), G_get_null_value_color(), G_init_colors(), G_next_cell_stat(), G_rewind_cell_stats(), G_set_default_color(), G_set_null_value_color(), max, and min.

void G_histogram_eq_colors_fp	(	struct Colors *	dst,
		struct Colors *	src,
		struct FP_stats *	statf
	)

make histogram-stretched version of existing color table (FP version)

Generates a histogram contrast-stretched color table that goes from the histogram information in the FP_stats structure statf. (See Raster_Histograms).

Parameters

dst
src
statf

Returns

void

Definition at line 132 of file color_xform.c.

References first, G_add_d_raster_color_rule(), G_get_d_color_range(), G_get_d_raster_color(), G_get_default_color(), G_get_null_value_color(), G_init_colors(), G_set_default_color(), G_set_null_value_color(), if(), max, min, and val2.

int G_log_colors	(	struct Colors *	dst,
		struct Colors *	src,
		int	samples
	)

make logarithmically-scaled version of an existing color table

Parameters

dst
src
samples

Returns

int

Definition at line 197 of file color_xform.c.

References G_add_d_raster_color_rule(), G_get_d_color_range(), G_get_d_raster_color(), G_get_default_color(), G_get_null_value_color(), G_init_colors(), G_set_default_color(), G_set_null_value_color(), wxnviz::log, max, min, and y.