color_get.c

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#include <grass/gis.h>


int G_get_color(CELL n, int *red, int *grn, int *blu, struct Colors *colors)
{
    CELL cat;
    unsigned char r, g, b, set;

    cat = n;
    G_lookup_colors(&cat, &r, &g, &b, &set, 1, colors);

    *red = (int)r;
    *grn = (int)g;
    *blu = (int)b;

    return (int)set;
}


int G_get_raster_color(const void *rast,
                       int *red, int *grn, int *blu,
                       struct Colors *colors, RASTER_MAP_TYPE map_type)
{
    unsigned char r, g, b, set;

    G_lookup_raster_colors(rast, &r, &g, &b, &set, 1, colors, map_type);

    *red = (int)r;
    *grn = (int)g;
    *blu = (int)b;

    return (int)set;
}


int G_get_c_raster_color(const CELL * rast,
                         int *red, int *grn, int *blu, struct Colors *colors)
{
    return G_get_raster_color(rast, red, grn, blu, colors, CELL_TYPE);
}


int G_get_f_raster_color(const FCELL * rast,
                         int *red, int *grn, int *blu, struct Colors *colors)
{
    return G_get_raster_color(rast, red, grn, blu, colors, FCELL_TYPE);
}


int G_get_d_raster_color(const DCELL * rast,
                         int *red, int *grn, int *blu, struct Colors *colors)
{
    return G_get_raster_color(rast, red, grn, blu, colors, DCELL_TYPE);
}


int G_get_null_value_color(int *red, int *grn, int *blu,
                           const struct Colors *colors)
{
    if (colors->null_set) {
        *red = (int)colors->null_red;
        *grn = (int)colors->null_grn;
        *blu = (int)colors->null_blu;
    }
    else if (colors->undef_set) {
        *red = (int)colors->undef_red;
        *grn = (int)colors->undef_grn;
        *blu = (int)colors->undef_blu;
    }
    else
        *red = *blu = *grn = 255;       /* white */

    return 0;
}


int G_get_default_color(int *red, int *grn, int *blu,
                        const struct Colors *colors)
{
    if (colors->undef_set) {
        *red = (int)colors->undef_red;
        *grn = (int)colors->undef_grn;
        *blu = (int)colors->undef_blu;
    }
    else
        *red = *blu = *grn = 255;       /* white */

    return 0;
}