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color_get.c

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00001 
00017 #include <grass/gis.h>
00018 
00019 
00036 int G_get_color(CELL n, int *red, int *grn, int *blu, struct Colors *colors)
00037 {
00038     CELL cat;
00039     unsigned char r, g, b, set;
00040 
00041     cat = n;
00042     G_lookup_colors(&cat, &r, &g, &b, &set, 1, colors);
00043 
00044     *red = (int)r;
00045     *grn = (int)g;
00046     *blu = (int)b;
00047 
00048     return (int)set;
00049 }
00050 
00051 
00067 int G_get_raster_color(const void *rast,
00068                        int *red, int *grn, int *blu,
00069                        struct Colors *colors, RASTER_MAP_TYPE map_type)
00070 {
00071     unsigned char r, g, b, set;
00072 
00073     G_lookup_raster_colors(rast, &r, &g, &b, &set, 1, colors, map_type);
00074 
00075     *red = (int)r;
00076     *grn = (int)g;
00077     *blu = (int)b;
00078 
00079     return (int)set;
00080 }
00081 
00082 
00097 int G_get_c_raster_color(const CELL * rast,
00098                          int *red, int *grn, int *blu, struct Colors *colors)
00099 {
00100     return G_get_raster_color(rast, red, grn, blu, colors, CELL_TYPE);
00101 }
00102 
00103 
00118 int G_get_f_raster_color(const FCELL * rast,
00119                          int *red, int *grn, int *blu, struct Colors *colors)
00120 {
00121     return G_get_raster_color(rast, red, grn, blu, colors, FCELL_TYPE);
00122 }
00123 
00124 
00139 int G_get_d_raster_color(const DCELL * rast,
00140                          int *red, int *grn, int *blu, struct Colors *colors)
00141 {
00142     return G_get_raster_color(rast, red, grn, blu, colors, DCELL_TYPE);
00143 }
00144 
00145 
00159 int G_get_null_value_color(int *red, int *grn, int *blu,
00160                            const struct Colors *colors)
00161 {
00162     if (colors->null_set) {
00163         *red = (int)colors->null_red;
00164         *grn = (int)colors->null_grn;
00165         *blu = (int)colors->null_blu;
00166     }
00167     else if (colors->undef_set) {
00168         *red = (int)colors->undef_red;
00169         *grn = (int)colors->undef_grn;
00170         *blu = (int)colors->undef_blu;
00171     }
00172     else
00173         *red = *blu = *grn = 255;       /* white */
00174 
00175     return 0;
00176 }
00177 
00178 
00192 int G_get_default_color(int *red, int *grn, int *blu,
00193                         const struct Colors *colors)
00194 {
00195     if (colors->undef_set) {
00196         *red = (int)colors->undef_red;
00197         *grn = (int)colors->undef_grn;
00198         *blu = (int)colors->undef_blu;
00199     }
00200     else
00201         *red = *blu = *grn = 255;       /* white */
00202 
00203     return 0;
00204 }

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