get_row_colr.c File Reference

#include <grass/gis.h>
#include "G.h"

Include dependency graph for get_row_colr.c:

Go to the source code of this file.

Functions
int	G_get_raster_row_colors (int fd, int row, struct Colors *colors, unsigned char *red, unsigned char *grn, unsigned char *blu, unsigned char *nul)
	Reads a row of raster data and converts it to red, green and blue components according to the colors parameter. This provides a convenient way to treat a raster layer as a color image without having to explictly cater for each of CELL, FCELL and DCELL types.

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Function Documentation

int G_get_raster_row_colors	(	int	fd,
		int	row,
		struct Colors *	colors,
		unsigned char *	red,
		unsigned char *	grn,
		unsigned char *	blu,
		unsigned char *	nul
	)

Reads a row of raster data and converts it to red, green and blue components according to the colors parameter. This provides a convenient way to treat a raster layer as a color image without having to explictly cater for each of CELL, FCELL and DCELL types.

Parameters:

	fd
	row
	colors
	red
	grn
	blu
	nul

Returns:

int

Definition at line 24 of file get_row_colr.c.

References G_get_raster_row(), G_incr_void_ptr(), G_is_null_value(), G_lookup_raster_colors(), G_raster_size(), and G_realloc().

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