bool GRASS_EXPORT QgsGrass::mapRegion( int type, QString gisbase, QString location, QString mapset, QString map, struct Cell_head *window ) { QgsDebugMsg( "entered." ); QgsDebugMsg( QString( "map = %1" ).arg( map ) ); QgsDebugMsg( QString( "mapset = %1" ).arg( mapset ) ); QgsGrass::setLocation( gisbase, location ); if ( type == Raster ) { if ( G_get_cellhd( map.toUtf8().data(), mapset.toUtf8().data(), window ) < 0 ) { QMessageBox::warning( 0, QObject::tr( "Warning" ), QObject::tr( "Cannot read raster map region" ) ); return false; } } else if ( type == Vector ) { // Get current projection region( gisbase, location, mapset, window ); struct Map_info Map; int level = Vect_open_old_head( &Map, map.toUtf8().data(), mapset.toUtf8().data() ); if ( level < 2 ) { QMessageBox::warning( 0, QObject::tr( "Warning" ), QObject::tr( "Cannot read vector map region" ) ); return false; } BOUND_BOX box; Vect_get_map_box( &Map, &box ); window->north = box.N; window->south = box.S; window->west = box.W; window->east = box.E; window->top = box.T; window->bottom = box.B; // Is this optimal ? window->ns_res = ( window->north - window->south ) / 1000; window->ew_res = window->ns_res; if ( window->top > window->bottom ) { window->tb_res = ( window->top - window->bottom ) / 10; } else { window->top = window->bottom + 1; window->tb_res = 1; } G_adjust_Cell_head3( window, 0, 0, 0 ); Vect_close( &Map ); } else if ( type == Region ) { if ( G__get_window( window, ( char * ) "windows", map.toUtf8().data(), mapset.toUtf8().data() ) != NULL ) { QMessageBox::warning( 0, QObject::tr( "Warning" ), QObject::tr( "Cannot read region" ) ); return false; } } return true; }
int main(int argc, char *argv[]) { int i; int print_flag = 0; int flat_flag; int set_flag; double x; int ival; int row_flag = 0, col_flag = 0; struct Cell_head window, temp_window; const char *value; const char *name; const char *mapset; char **rast_ptr, **vect_ptr; struct GModule *module; struct { struct Flag *update, *print, *gprint, *flprint, *lprint, *eprint, *nangle, *center, *res_set, *dist_res, *dflt, *z, *savedefault, *bbox, *gmt_style, *wms_style; } flag; struct { struct Option *north, *south, *east, *west, *top, *bottom, *res, *nsres, *ewres, *res3, *tbres, *rows, *cols, *save, *region, *raster, *raster3d, *align, *zoom, *vect; } parm; G_gisinit(argv[0]); module = G_define_module(); G_add_keyword(_("general")); G_add_keyword(_("settings")); module->description = _("Manages the boundary definitions for the " "geographic region."); /* flags */ flag.dflt = G_define_flag(); flag.dflt->key = 'd'; flag.dflt->description = _("Set from default region"); flag.dflt->guisection = _("Existing"); flag.savedefault = G_define_flag(); flag.savedefault->key = 's'; flag.savedefault->label = _("Save as default region"); flag.savedefault->description = _("Only possible from the PERMANENT mapset"); flag.savedefault->guisection = _("Existing"); flag.print = G_define_flag(); flag.print->key = 'p'; flag.print->description = _("Print the current region"); flag.print->guisection = _("Print"); flag.lprint = G_define_flag(); flag.lprint->key = 'l'; flag.lprint->description = _("Print the current region in lat/long " "using the current ellipsoid/datum"); flag.lprint->guisection = _("Print"); flag.eprint = G_define_flag(); flag.eprint->key = 'e'; flag.eprint->description = _("Print the current region extent"); flag.eprint->guisection = _("Print"); flag.center = G_define_flag(); flag.center->key = 'c'; flag.center->description = _("Print the current region map center coordinates"); flag.center->guisection = _("Print"); flag.gmt_style = G_define_flag(); flag.gmt_style->key = 't'; flag.gmt_style->description = _("Print the current region in GMT style"); flag.gmt_style->guisection = _("Print"); flag.wms_style = G_define_flag(); flag.wms_style->key = 'w'; flag.wms_style->description = _("Print the current region in WMS style"); flag.wms_style->guisection = _("Print"); flag.dist_res = G_define_flag(); flag.dist_res->key = 'm'; flag.dist_res->description = _("Print region resolution in meters (geodesic)"); flag.dist_res->guisection = _("Print"); flag.nangle = G_define_flag(); flag.nangle->key = 'n'; flag.nangle->label = _("Print the convergence angle (degrees CCW)"); flag.nangle->description = _("The difference between the projection's grid north and true north, " "measured at the center coordinates of the current region."); flag.nangle->guisection = _("Print"); flag.z = G_define_flag(); flag.z->key = '3'; flag.z->description = _("Print also 3D settings"); flag.z->guisection = _("Print"); flag.bbox = G_define_flag(); flag.bbox->key = 'b'; flag.bbox->description = _("Print the maximum bounding box in lat/long on WGS84"); flag.bbox->guisection = _("Print"); flag.gprint = G_define_flag(); flag.gprint->key = 'g'; flag.gprint->description = _("Print in shell script style"); flag.gprint->guisection = _("Print"); flag.flprint = G_define_flag(); flag.flprint->key = 'f'; flag.flprint->description = _("Print in shell script style, but in one line (flat)"); flag.flprint->guisection = _("Print"); flag.res_set = G_define_flag(); flag.res_set->key = 'a'; flag.res_set->description = _("Align region to resolution (default = align to bounds, " "works only for 2D resolution)"); flag.res_set->guisection = _("Bounds"); flag.update = G_define_flag(); flag.update->key = 'u'; flag.update->description = _("Do not update the current region"); flag.update->guisection = _("Effects"); /* parameters */ parm.region = G_define_standard_option(G_OPT_M_REGION); parm.region->description = _("Set current region from named region"); parm.region->guisection = _("Existing"); parm.raster = G_define_standard_option(G_OPT_R_MAP); parm.raster->key = "raster"; parm.raster->required = NO; parm.raster->multiple = YES; parm.raster->description = _("Set region to match raster map(s)"); parm.raster->guisection = _("Existing"); parm.raster3d = G_define_standard_option(G_OPT_R3_MAP); parm.raster3d->key = "raster_3d"; parm.raster3d->required = NO; parm.raster3d->multiple = NO; parm.raster3d->description = _("Set region to match 3D raster map(s) (both 2D and 3D " "values)"); parm.raster3d->guisection = _("Existing"); parm.vect = G_define_standard_option(G_OPT_V_MAP); parm.vect->key = "vector"; parm.vect->required = NO; parm.vect->multiple = YES; parm.vect->label = _("Set region to match vector map(s)"); parm.vect->description = NULL; parm.vect->guisection = _("Existing"); parm.north = G_define_option(); parm.north->key = "n"; parm.north->key_desc = "value"; parm.north->required = NO; parm.north->multiple = NO; parm.north->type = TYPE_STRING; parm.north->description = _("Value for the northern edge"); parm.north->guisection = _("Bounds"); parm.south = G_define_option(); parm.south->key = "s"; parm.south->key_desc = "value"; parm.south->required = NO; parm.south->multiple = NO; parm.south->type = TYPE_STRING; parm.south->description = _("Value for the southern edge"); parm.south->guisection = _("Bounds"); parm.east = G_define_option(); parm.east->key = "e"; parm.east->key_desc = "value"; parm.east->required = NO; parm.east->multiple = NO; parm.east->type = TYPE_STRING; parm.east->description = _("Value for the eastern edge"); parm.east->guisection = _("Bounds"); parm.west = G_define_option(); parm.west->key = "w"; parm.west->key_desc = "value"; parm.west->required = NO; parm.west->multiple = NO; parm.west->type = TYPE_STRING; parm.west->description = _("Value for the western edge"); parm.west->guisection = _("Bounds"); parm.top = G_define_option(); parm.top->key = "t"; parm.top->key_desc = "value"; parm.top->required = NO; parm.top->multiple = NO; parm.top->type = TYPE_STRING; parm.top->description = _("Value for the top edge"); parm.top->guisection = _("Bounds"); parm.bottom = G_define_option(); parm.bottom->key = "b"; parm.bottom->key_desc = "value"; parm.bottom->required = NO; parm.bottom->multiple = NO; parm.bottom->type = TYPE_STRING; parm.bottom->description = _("Value for the bottom edge"); parm.bottom->guisection = _("Bounds"); parm.rows = G_define_option(); parm.rows->key = "rows"; parm.rows->key_desc = "value"; parm.rows->required = NO; parm.rows->multiple = NO; parm.rows->type = TYPE_INTEGER; parm.rows->description = _("Number of rows in the new region"); parm.rows->guisection = _("Resolution"); parm.cols = G_define_option(); parm.cols->key = "cols"; parm.cols->key_desc = "value"; parm.cols->required = NO; parm.cols->multiple = NO; parm.cols->type = TYPE_INTEGER; parm.cols->description = _("Number of columns in the new region"); parm.cols->guisection = _("Resolution"); parm.res = G_define_option(); parm.res->key = "res"; parm.res->key_desc = "value"; parm.res->required = NO; parm.res->multiple = NO; parm.res->type = TYPE_STRING; parm.res->description = _("2D grid resolution (north-south and east-west)"); parm.res->guisection = _("Resolution"); parm.res3 = G_define_option(); parm.res3->key = "res3"; parm.res3->key_desc = "value"; parm.res3->required = NO; parm.res3->multiple = NO; parm.res3->type = TYPE_STRING; parm.res3->description = _("3D grid resolution (north-south, east-west and top-bottom)"); parm.res3->guisection = _("Resolution"); parm.nsres = G_define_option(); parm.nsres->key = "nsres"; parm.nsres->key_desc = "value"; parm.nsres->required = NO; parm.nsres->multiple = NO; parm.nsres->type = TYPE_STRING; parm.nsres->description = _("North-south 2D grid resolution"); parm.nsres->guisection = _("Resolution"); parm.ewres = G_define_option(); parm.ewres->key = "ewres"; parm.ewres->key_desc = "value"; parm.ewres->required = NO; parm.ewres->multiple = NO; parm.ewres->type = TYPE_STRING; parm.ewres->description = _("East-west 2D grid resolution"); parm.ewres->guisection = _("Resolution"); parm.tbres = G_define_option(); parm.tbres->key = "tbres"; parm.tbres->key_desc = "value"; parm.tbres->required = NO; parm.tbres->multiple = NO; parm.tbres->type = TYPE_STRING; parm.tbres->description = _("Top-bottom 3D grid resolution"); parm.tbres->guisection = _("Resolution"); parm.zoom = G_define_option(); parm.zoom->key = "zoom"; parm.zoom->key_desc = "name"; parm.zoom->required = NO; parm.zoom->multiple = NO; parm.zoom->type = TYPE_STRING; parm.zoom->description = _("Shrink region until it meets non-NULL data from this raster map"); parm.zoom->gisprompt = "old,cell,raster"; parm.zoom->guisection = _("Bounds"); parm.align = G_define_option(); parm.align->key = "align"; parm.align->key_desc = "name"; parm.align->required = NO; parm.align->multiple = NO; parm.align->type = TYPE_STRING; parm.align->description = _("Adjust region cells to cleanly align with this raster map"); parm.align->gisprompt = "old,cell,raster"; parm.align->guisection = _("Bounds"); parm.save = G_define_option(); parm.save->key = "save"; parm.save->key_desc = "name"; parm.save->required = NO; parm.save->multiple = NO; parm.save->type = TYPE_STRING; parm.save->description = _("Save current region settings in named region file"); parm.save->gisprompt = "new,windows,region"; parm.save->guisection = _("Effects"); G_option_required(flag.dflt, flag.savedefault, flag.print, flag.lprint, flag.eprint, flag.center, flag.gmt_style, flag.wms_style, flag.dist_res, flag.nangle, flag. z, flag.bbox, flag.gprint, flag.res_set, flag.update, parm.region, parm.raster, parm.raster3d, parm.vect, parm.north, parm.south, parm.east, parm.west, parm.top, parm.bottom, parm.rows, parm.cols, parm.res, parm.res3, parm.nsres, parm.ewres, parm.tbres, parm.zoom, parm.align, parm.save, NULL); if (G_parser(argc, argv)) exit(EXIT_FAILURE); G_get_default_window(&window); set_flag = !flag.update->answer; flat_flag = flag.flprint->answer; if (flag.print->answer) print_flag |= PRINT_REG; if (flag.gprint->answer) print_flag |= PRINT_SH; if (flag.lprint->answer) print_flag |= PRINT_LL; if (flag.eprint->answer) print_flag |= PRINT_EXTENT; if (flag.center->answer) print_flag |= PRINT_CENTER; if (flag.gmt_style->answer) print_flag |= PRINT_GMT; if (flag.wms_style->answer) print_flag |= PRINT_WMS; if (flag.nangle->answer) print_flag |= PRINT_NANGLE; if (flag.dist_res->answer) print_flag |= PRINT_METERS; if (flag.z->answer) print_flag |= PRINT_3D; if (flag.bbox->answer) print_flag |= PRINT_MBBOX; if (print_flag == PRINT_METERS) print_flag |= PRINT_SH; if (print_flag == PRINT_SH || print_flag & PRINT_3D || print_flag == PRINT_METERS + PRINT_SH) { print_flag |= PRINT_REG; } if (!flag.dflt->answer) G_get_window(&window); /* region= */ if ((name = parm.region->answer)) { mapset = G_find_file2("windows", name, ""); if (!mapset) G_fatal_error(_("Region <%s> not found"), name); G_get_element_window(&window, "windows", name, mapset); } /* raster= */ if (parm.raster->answer) { int first = 0; rast_ptr = parm.raster->answers; for (; *rast_ptr != NULL; rast_ptr++) { char rast_name[GNAME_MAX]; strcpy(rast_name, *rast_ptr); mapset = G_find_raster2(rast_name, ""); if (!mapset) G_fatal_error(_("Raster map <%s> not found"), rast_name); Rast_get_cellhd(rast_name, mapset, &temp_window); if (!first) { window = temp_window; first = 1; } else { window.north = (window.north > temp_window.north) ? window.north : temp_window.north; window.south = (window.south < temp_window.south) ? window.south : temp_window.south; window.east = (window.east > temp_window.east) ? window.east : temp_window.east; window.west = (window.west < temp_window.west) ? window.west : temp_window.west; } } G_adjust_Cell_head3(&window, 0, 0, 0); } /* raster3d= */ if ((name = parm.raster3d->answer)) { RASTER3D_Region win; if ((mapset = G_find_raster3d(name, "")) == NULL) G_fatal_error(_("3D raster map <%s> not found"), name); if (Rast3d_read_region_map(name, mapset, &win) < 0) G_fatal_error(_("Unable to read header of 3D raster map <%s@%s>"), name, mapset); Rast3d_region_to_cell_head(&win, &window); } /* vector= */ if (parm.vect->answer) { int first = 0; vect_ptr = parm.vect->answers; for (; *vect_ptr != NULL; vect_ptr++) { struct Map_info Map; struct bound_box box; char vect_name[GNAME_MAX]; struct Cell_head map_window; strcpy(vect_name, *vect_ptr); mapset = G_find_vector2(vect_name, ""); if (!mapset) G_fatal_error(_("Vector map <%s> not found"), vect_name); temp_window = window; Vect_set_open_level(2); if (2 > Vect_open_old_head(&Map, vect_name, mapset)) G_fatal_error(_("Unable to open vector map <%s> on topological level"), vect_name); Vect_get_map_box(&Map, &box); map_window = window; map_window.north = box.N; map_window.south = box.S; map_window.west = box.W; map_window.east = box.E; map_window.top = box.T; map_window.bottom = box.B; if (!first) { window = map_window; first = 1; } else { window.north = (window.north > map_window.north) ? window.north : map_window.north; window.south = (window.south < map_window.south) ? window.south : map_window.south; window.east = (window.east > map_window.east) ? window.east : map_window.east; window.west = (window.west < map_window.west) ? window.west : map_window.west; if (map_window.top > window.top) window.top = map_window.top; if (map_window.bottom < window.bottom) window.bottom = map_window.bottom; } if (window.north == window.south) { window.north = window.north + 0.5 * temp_window.ns_res; window.south = window.south - 0.5 * temp_window.ns_res; } if (window.east == window.west) { window.west = window.west - 0.5 * temp_window.ew_res; window.east = window.east + 0.5 * temp_window.ew_res; } if (window.top == window.bottom) { window.bottom = (window.bottom - 0.5 * temp_window.tb_res); window.top = (window.top + 0.5 * temp_window.tb_res); } if (flag.res_set->answer) Rast_align_window(&window, &temp_window); Vect_close(&Map); } } /* n= */ if ((value = parm.north->answer)) { if ((i = nsew(value, "n+", "n-", "s+"))) { if (!G_scan_resolution(value + 2, &x, window.proj)) die(parm.north); switch (i) { case 1: window.north += x; break; case 2: window.north -= x; break; case 3: window.north = window.south + x; break; } } else if (G_scan_northing(value, &x, window.proj)) window.north = x; else die(parm.north); } /* s= */ if ((value = parm.south->answer)) { if ((i = nsew(value, "s+", "s-", "n-"))) { if (!G_scan_resolution(value + 2, &x, window.proj)) die(parm.south); switch (i) { case 1: window.south += x; break; case 2: window.south -= x; break; case 3: window.south = window.north - x; break; } } else if (G_scan_northing(value, &x, window.proj)) window.south = x; else die(parm.south); } /* e= */ if ((value = parm.east->answer)) { if ((i = nsew(value, "e+", "e-", "w+"))) { if (!G_scan_resolution(value + 2, &x, window.proj)) die(parm.east); switch (i) { case 1: window.east += x; break; case 2: window.east -= x; break; case 3: window.east = window.west + x; break; } } else if (G_scan_easting(value, &x, window.proj)) window.east = x; else die(parm.east); } /* w= */ if ((value = parm.west->answer)) { if ((i = nsew(value, "w+", "w-", "e-"))) { if (!G_scan_resolution(value + 2, &x, window.proj)) die(parm.west); switch (i) { case 1: window.west += x; break; case 2: window.west -= x; break; case 3: window.west = window.east - x; break; } } else if (G_scan_easting(value, &x, window.proj)) window.west = x; else die(parm.west); } /* t= */ if ((value = parm.top->answer)) { if ((i = nsew(value, "t+", "t-", "b+"))) { if (sscanf(value + 2, "%lf", &x) != 1) die(parm.top); switch (i) { case 1: window.top += x; break; case 2: window.top -= x; break; case 3: window.top = window.bottom + x; break; } } else if (sscanf(value, "%lf", &x) == 1) window.top = x; else die(parm.top); } /* b= */ if ((value = parm.bottom->answer)) { if ((i = nsew(value, "b+", "b-", "t-"))) { if (sscanf(value + 2, "%lf", &x) != 1) die(parm.bottom); switch (i) { case 1: window.bottom += x; break; case 2: window.bottom -= x; break; case 3: window.bottom = window.top - x; break; } } else if (sscanf(value, "%lf", &x) == 1) window.bottom = x; else die(parm.bottom); } /* res= */ if ((value = parm.res->answer)) { if (!G_scan_resolution(value, &x, window.proj)) die(parm.res); window.ns_res = x; window.ew_res = x; if (flag.res_set->answer) { window.north = ceil(window.north / x) * x; window.south = floor(window.south / x) * x; window.east = ceil(window.east / x) * x; window.west = floor(window.west / x) * x; } } /* res3= */ if ((value = parm.res3->answer)) { if (!G_scan_resolution(value, &x, window.proj)) die(parm.res); window.ns_res3 = x; window.ew_res3 = x; window.tb_res = x; } /* nsres= */ if ((value = parm.nsres->answer)) { if (!G_scan_resolution(value, &x, window.proj)) die(parm.nsres); window.ns_res = x; if (flag.res_set->answer) { window.north = ceil(window.north / x) * x; window.south = floor(window.south / x) * x; } } /* ewres= */ if ((value = parm.ewres->answer)) { if (!G_scan_resolution(value, &x, window.proj)) die(parm.ewres); window.ew_res = x; if (flag.res_set->answer) { window.east = ceil(window.east / x) * x; window.west = floor(window.west / x) * x; } } /* tbres= */ if ((value = parm.tbres->answer)) { if (sscanf(value, "%lf", &x) != 1) die(parm.tbres); window.tb_res = x; if (flag.res_set->answer) { window.top = ceil(window.top / x) * x; window.bottom = floor(window.bottom / x) * x; } } /* rows= */ if ((value = parm.rows->answer)) { if (sscanf(value, "%i", &ival) != 1) die(parm.rows); window.rows = ival; row_flag = 1; } /* cols= */ if ((value = parm.cols->answer)) { if (sscanf(value, "%i", &ival) != 1) die(parm.cols); window.cols = ival; col_flag = 1; } /* zoom= */ if ((name = parm.zoom->answer)) { mapset = G_find_raster2(name, ""); if (!mapset) G_fatal_error(_("Raster map <%s> not found"), name); zoom(&window, name, mapset); } /* align= */ if ((name = parm.align->answer)) { mapset = G_find_raster2(name, ""); if (!mapset) G_fatal_error(_("Raster map <%s> not found"), name); Rast_get_cellhd(name, mapset, &temp_window); Rast_align_window(&window, &temp_window); } /* save= */ if ((name = parm.save->answer)) { temp_window = window; G_adjust_Cell_head3(&temp_window, 0, 0, 0); if (G_put_element_window(&temp_window, "windows", name) < 0) G_fatal_error(_("Unable to set region <%s>"), name); } G_adjust_Cell_head3(&window, row_flag, col_flag, 0); if (set_flag) { if (G_put_window(&window) < 0) G_fatal_error(_("Unable to update current region")); } if (flag.savedefault->answer) { if (strcmp(G_mapset(), "PERMANENT") == 0) { G_put_element_window(&window, "", "DEFAULT_WIND"); } else { G_fatal_error(_("Unable to change default region. " "The current mapset is not <PERMANENT>.")); } } /* / flag.savedefault->answer */ if (print_flag) print_window(&window, print_flag, flat_flag); exit(EXIT_SUCCESS); }
int main(int argc, char **argv) { struct GModule *module; int i, first = 1; char *mapset; char **rast, **vect; int nrasts, nvects; struct Cell_head window, temp_window; G_gisinit(argv[0]); module = G_define_module(); module->keywords = _("display, setup"); module->description = "Sets window region so that all currently displayed raster " "and vector maps can be shown in a monitor."; if (argc > 1 && G_parser(argc, argv)) exit(-1); if (R_open_driver() != 0) G_fatal_error(_("No graphics device selected")); if (D_get_cell_list(&rast, &nrasts) < 0) rast = NULL; if (D_get_dig_list(&vect, &nvects) < 0) vect = NULL; R_close_driver(); if (rast == NULL && vect == NULL) G_fatal_error(_("No raster or vector map displayed")); G_get_window(&window); if (rast) { for (i = 0; i < nrasts; i++) { mapset = G_find_cell2(rast[i], ""); if (mapset == NULL) G_fatal_error(_("Raster map <%s> not found"), rast[i]); if (G_get_cellhd(rast[i], mapset, &temp_window) >= 0) { if (first) { first = 0; G_copy(&window, &temp_window, sizeof(window)); } else { if (window.east < temp_window.east) window.east = temp_window.east; if (window.west > temp_window.west) window.west = temp_window.west; if (window.south > temp_window.south) window.south = temp_window.south; if (window.north < temp_window.north) window.north = temp_window.north; /* if(window.ns_res < nsres) nsres = window.ns_res; if(window.ew_res < ewres) ewres = window.ew_res; */ } } } G_adjust_Cell_head3(&window, 0, 0, 0); } if (vect) { struct Map_info Map; G_copy(&temp_window, &window, sizeof(window)); Vect_set_open_level(2); for (i = 0; i < nvects; i++) { mapset = G_find_vector2(vect[i], ""); if (mapset == NULL) G_fatal_error(_("Vector map <%s> not found"), vect[i]); if (Vect_open_old_head(&Map, vect[i], mapset) == 2) { if (first) { first = 0; window.east = Map.plus.box.E; window.west = Map.plus.box.W; window.south = Map.plus.box.S; window.north = Map.plus.box.N; } else { if (window.east < Map.plus.box.E) window.east = Map.plus.box.E; if (window.west > Map.plus.box.W) window.west = Map.plus.box.W; if (window.south > Map.plus.box.S) window.south = Map.plus.box.S; if (window.north < Map.plus.box.N) window.north = Map.plus.box.N; } Vect_close(&Map); } } if (window.north == window.south) { window.north += 0.5 * temp_window.ns_res; window.south -= 0.5 * temp_window.ns_res; } if (window.east == window.west) { window.east += 0.5 * temp_window.ew_res; window.west -= 0.5 * temp_window.ew_res; } G_align_window(&window, &temp_window); } G_adjust_Cell_head3(&window, 0, 0, 0); G_put_window(&window); exit(0); }
int zoom(struct Cell_head *window, const char *name, const char *mapset) { int fd; void *raster, *rast_ptr; RASTER_MAP_TYPE map_type; int row, col; int nrows, ncols; int top, bottom, left, right, mark; double north, south, east, west; G_adjust_Cell_head3(window, 0, 0, 0); Rast_set_window(window); nrows = window->rows; ncols = window->cols; fd = Rast_open_old(name, mapset); map_type = Rast_get_map_type(fd); raster = Rast_allocate_buf(map_type); /* find first non-null row */ top = nrows; bottom = -1; left = ncols; right = -1; for (row = 0; row < nrows; row++) { Rast_get_row(fd, rast_ptr = raster, row, map_type); for (col = 0; col < ncols; col++) { if (!Rast_is_null_value(rast_ptr, map_type)) break; rast_ptr = G_incr_void_ptr(rast_ptr, Rast_cell_size(map_type)); } if (col == ncols) continue; if (row < top) top = row; if (row > bottom) bottom = row; if (col < left) left = col; for (mark = col; col < ncols; col++) { if (!Rast_is_null_value(rast_ptr, map_type)) mark = col; rast_ptr = G_incr_void_ptr(rast_ptr, Rast_cell_size(map_type)); } if (mark > right) right = mark; } Rast_close(fd); G_free(raster); /* no data everywhere? */ if (bottom < 0) return 0; north = window->north - top * window->ns_res; south = window->north - (bottom + 1) * window->ns_res; west = window->west + left * window->ew_res; east = window->west + (right + 1) * window->ew_res; window->north = north; window->south = south; window->east = east; window->west = west; return 1; }