Geografic-Information-System/display/d.vect/shape.c

#include <grass/vector.h>
#include <grass/dbmi.h>
#include <grass/raster.h>
#include <grass/glocale.h>

#include "local_proto.h"

static void error_handler(void *p)
{
    dbDriver *driver = (dbDriver *) p;
    
    db_close_database_shutdown_driver(driver);
}

int display_shape(struct Map_info *Map, int type, struct cat_list *Clist, const struct Cell_head *window, 
		  const struct color_rgb *bcolor, const struct color_rgb *fcolor, int chcat,
		  const char *icon, double size, const char *size_column, int sqrt_flag, const char *rot_column, /* lines only */
		  int id_flag, int table_colors_flag, int cats_colors_flag, char *rgb_column,
		  int default_width, char *width_column, double width_scale,
		  int z_color_flag, char *z_style)
{
    int open_db, field, i, stat;
    dbCatValArray cvarr_rgb, cvarr_width, cvarr_size, cvarr_rot;
    struct field_info *fi;
    dbDriver *driver;
    int nrec_rgb, nrec_width, nrec_size, nrec_rot, have_colors;
    struct Colors colors, zcolors;
    struct bound_box box;
    
    stat = 0;
    nrec_rgb = nrec_width = nrec_size = nrec_rot = 0;
    
    open_db = table_colors_flag || width_column || size_column || rot_column;
    if (open_db) {
	field = Clist->field > 0 ? Clist->field : 1;
	fi = Vect_get_field(Map, field);
	if (!fi) {
	    G_fatal_error(_("Database connection not defined for layer %d"),
			  field);
	}
	
	driver = db_start_driver_open_database(fi->driver, fi->database);
	if (!driver)
	    G_fatal_error(_("Unable to open database <%s> by driver <%s>"),
			  fi->database, fi->driver);

	/* add error handler */
	G_add_error_handler(error_handler, driver);
    }
    
    /* fisrt search for color table */
    have_colors = Vect_read_colors(Vect_get_name(Map), Vect_get_mapset(Map),
				   &colors);
    
    if (table_colors_flag) {
	/* read RRR:GGG:BBB color strings from table */
	if (!rgb_column || *rgb_column == '\0')
	    G_fatal_error(_("Color definition column not specified"));
	
	db_CatValArray_init(&cvarr_rgb);
	
	nrec_rgb = db_select_CatValArray(driver, fi->table, fi->key,
					 rgb_column, NULL, &cvarr_rgb);
	
	G_debug(3, "nrec_rgb (%s) = %d", rgb_column, nrec_rgb);
	    
	if (cvarr_rgb.ctype != DB_C_TYPE_STRING)
	    G_warning(_("Color definition column ('%s') not a string. "
			"Column must be of form 'RRR:GGG:BBB' where RGB values range 0-255. "
			"You can use '%s' module to define color rules. "
			"Unable to colorize features."),
		      rgb_column, "v.colors");
	else {
	    if (nrec_rgb < 0)
		G_fatal_error(_("Unable to select data ('%s') from table"),
			      rgb_column);
	    
	    G_debug(2, "\n%d records selected from table", nrec_rgb);
	}
    }
    if (width_column) {
	if (*width_column == '\0')
	    G_fatal_error(_("Line width column not specified"));

	db_CatValArray_init(&cvarr_width);

	nrec_width = db_select_CatValArray(driver, fi->table, fi->key,
					   width_column, NULL, &cvarr_width);

	G_debug(3, "nrec_width (%s) = %d", width_column, nrec_width);

	if (cvarr_width.ctype != DB_C_TYPE_INT &&
	    cvarr_width.ctype != DB_C_TYPE_DOUBLE)
	    G_fatal_error(_("Line width column ('%s') not a number"),
			  width_column);

	if (nrec_width < 0)
	    G_fatal_error(_("Unable to select data ('%s') from table"),
			  width_column);

	G_debug(2, "\n%d records selected from table", nrec_width);

	for (i = 0; i < cvarr_width.n_values; i++) {
	    G_debug(4, "cat = %d  %s = %d", cvarr_width.value[i].cat,
		    width_column,
		    (cvarr_width.ctype ==
		     DB_C_TYPE_INT ? cvarr_width.value[i].val.
		     i : (int)cvarr_width.value[i].val.d));
	}
    }

    if (size_column) {
	if (*size_column == '\0')
	    G_fatal_error(_("Symbol size column not specified"));
	
	db_CatValArray_init(&cvarr_size);

	nrec_size = db_select_CatValArray(driver, fi->table, fi->key,
					  size_column, NULL, &cvarr_size);
	
	G_debug(3, "nrec_size (%s) = %d", size_column, nrec_size);

	if (cvarr_size.ctype != DB_C_TYPE_INT &&
	    cvarr_size.ctype != DB_C_TYPE_DOUBLE)
	    G_fatal_error(_("Symbol size column ('%s') is not numeric"),
			  size_column);

	if (nrec_size < 0)
	    G_fatal_error(_("Unable to select data ('%s') from table"),
			  size_column);

	G_debug(2, " %d records selected from table", nrec_size);

	for (i = 0; i < cvarr_size.n_values; i++) {
	    G_debug(4, "(size) cat = %d  %s = %.2f", cvarr_size.value[i].cat,
		    size_column,
		    (cvarr_size.ctype ==
		     DB_C_TYPE_INT ? (double)cvarr_size.value[i].val.i
		     : cvarr_size.value[i].val.d));
	}
    }

    if (rot_column) {
	if (*rot_column == '\0')
	    G_fatal_error(_("Symbol rotation column not specified"));

	db_CatValArray_init(&cvarr_rot);

	nrec_rot = db_select_CatValArray(driver, fi->table, fi->key,
					 rot_column, NULL, &cvarr_rot);

	G_debug(3, "nrec_rot (%s) = %d", rot_column, nrec_rot);

	if (cvarr_rot.ctype != DB_C_TYPE_INT &&
	    cvarr_rot.ctype != DB_C_TYPE_DOUBLE)
	    G_fatal_error(_("Symbol rotation column ('%s') is not numeric"),
			  rot_column);

	if (nrec_rot < 0)
	    G_fatal_error(_("Unable to select data ('%s') from table"),
			  rot_column);

	G_debug(2, " %d records selected from table", nrec_rot);

	for (i = 0; i < cvarr_rot.n_values; i++) {
	    G_debug(4, "(rot) cat = %d  %s = %.2f", cvarr_rot.value[i].cat,
		    rot_column,
		    (cvarr_rot.ctype ==
		     DB_C_TYPE_INT ? (double)cvarr_rot.value[i].val.i
		     : cvarr_rot.value[i].val.d));
	}
    }

    if (open_db) {
	/* remove error handler */
	G_remove_error_handler(error_handler, driver);
	
	db_close_database_shutdown_driver(driver);
    }

    if (z_color_flag) {
	if (!Vect_is_3d(Map)) {
	    G_warning(_("Vector map is not 3D. Unable to colorize features based on z-coordinates."));
	    z_color_flag = 0;
	}
	else {
	    Vect_get_map_box(Map, &box);
	    Rast_make_fp_colors(&zcolors, z_style, box.B, box.T);
	}
    }

    stat = 0;
    if (type & GV_AREA && Vect_get_num_primitives(Map, GV_CENTROID | GV_BOUNDARY) > 0)
	stat += display_area(Map, Clist, window, 
			     bcolor, fcolor, chcat,
			     id_flag, cats_colors_flag,
			     default_width, width_scale,
			     z_color_flag ? &zcolors : NULL,
			     table_colors_flag ? &cvarr_rgb : NULL,
			     have_colors ? &colors : NULL,
			     &cvarr_width, nrec_width);
    
    stat += display_lines(Map, type, Clist,
			  bcolor, fcolor, chcat,
			  icon, size, sqrt_flag,
			  id_flag, cats_colors_flag,
			  default_width, width_scale,
			  z_color_flag ? &zcolors : NULL,
			  table_colors_flag ? &cvarr_rgb : NULL,
			  have_colors ? &colors : NULL,
			  &cvarr_width, nrec_width,
			  &cvarr_size, nrec_size,
			  &cvarr_rot, nrec_rot);
    
    return stat;
}

int get_table_color(int cat, int line,
		    struct Colors *colors, dbCatValArray *cvarr,
		    int *red, int *grn, int *blu)
{
    int custom_rgb;
    char colorstring[12];	/* RRR:GGG:BBB */
    
    dbCatVal *cv;

    custom_rgb = FALSE;
    cv = NULL;

    if (cat < 0)
	return custom_rgb;
    
    if (colors) {
	/* read color table */
	if (Rast_get_c_color(&cat, red, grn, blu, colors) == 1) {
	    custom_rgb = TRUE;
	    G_debug(3, "\tb: %d, g: %d, r: %d", *blu, *grn, *red);
	}
    }

    /* read RGB colors from db for current area # */
    if (cvarr && db_CatValArray_get_value(cvarr, cat, &cv) == DB_OK) {
	sprintf(colorstring, "%s", db_get_string(cv->val.s));
	if (*colorstring != '\0') {
	    G_debug(3, "element %d: colorstring: %s", line,
		    colorstring);
	    
	    if (G_str_to_color(colorstring, red, grn, blu) == 1) {
		custom_rgb = TRUE;
		G_debug(3, "element:%d  cat %d r:%d g:%d b:%d",
			line, cat, *red, *grn, *blu);
	    }
	    else {
		G_important_message(_("Error in color definition (%s) - feature %d with category %d"),
				    colorstring, line, cat);
		}
	}
	else {
	    G_important_message(_("Error in color definition (%s) - feature %d with category %d"),
				colorstring, line, cat);
	}
    }

    return custom_rgb;
}

int get_cat_color(int line, const struct line_cats *Cats, const struct cat_list *Clist,
		  int *red, int *grn, int *blu)
{
    int custom_rgb;
    unsigned char which;
    int cat;
    
    custom_rgb = FALSE;
    if (Clist->field > 0) {
	Vect_cat_get(Cats, Clist->field, &cat);
	if (cat >= 0) {
	    G_debug(3, "display element %d, cat %d", line, cat);
	    /* fetch color number from category */
	    which = (cat % palette_ncolors);
	    G_debug(3, "cat:%d which color:%d r:%d g:%d b:%d", cat,
		    which, palette[which].R, palette[which].G,
		    palette[which].B);
	    
	    custom_rgb = TRUE;
	    *red = palette[which].R;
	    *grn = palette[which].G;
	    *blu = palette[which].B;
	}
    }
    else if (Cats->n_cats > 0) {
	/* fetch color number from layer */
	which = (Cats->field[0] % palette_ncolors);
	G_debug(3, "layer:%d which color:%d r:%d g:%d b:%d",
		Cats->field[0], which, palette[which].R,
		palette[which].G, palette[which].B);
	
	custom_rgb = TRUE;
	*red = palette[which].R;
	*grn = palette[which].G;
	*blu = palette[which].B;
    }

    return custom_rgb;
}

double get_property(int cat, int line, dbCatValArray *cvarr, double scale, double default_value)
{
    double value;
    dbCatVal *cv;

    cv = NULL;

    if (cat < 0)
	return default_value;
    
    /* Read line width from db for current area # */
    if (db_CatValArray_get_value(cvarr, cat, &cv) != DB_OK) {
	value = default_value;
    }
    else {
	value = scale * (cvarr->ctype ==
			 DB_C_TYPE_INT ? (double) cv->val.i : cv->val.d);
	if (value < 0) {
	    G_important_message(_("Invalid negative value - feature %d with category %d"),
				line, cat);
	    value = default_value;
	}
    }

    return value;
}