40 unsigned char *red,
unsigned char *grn,
41 unsigned char *blu,
unsigned char *nul)
void Rast_get_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 RGB.
void G_free(void *)
Free allocated memory.
#define G_incr_void_ptr(ptr, size)
size_t Rast_cell_size(RASTER_MAP_TYPE)
Returns size of a raster cell in bytes.
void Rast_get_row(int, void *, int, RASTER_MAP_TYPE)
Get raster row.
void Rast_lookup_colors(const void *, unsigned char *, unsigned char *, unsigned char *, unsigned char *, int, struct Colors *, RASTER_MAP_TYPE)
Lookup an array of colors.
int Rast_window_cols(void)
Number of columns in active window.
RASTER_MAP_TYPE Rast_get_map_type(int)
Determine raster type from descriptor.
int Rast_is_null_value(const void *, RASTER_MAP_TYPE)
To check if a raster value is set to NULL.