com_io.c

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#include <grass/config.h>

#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <grass/gis.h>
#include <grass/glocale.h>
#include <grass/raster.h>
#include <grass/graphics.h>

#include "driver.h"
#include "transport.h"

struct transport loc_trans = {
    LOC_open_driver,
    LOC__open_quiet,
    LOC_stabilize,
    LOC_kill_driver,
    LOC_close_driver,
    LOC_release_driver,
    LOC_screen_left,
    LOC_screen_rite,
    LOC_screen_bot,
    LOC_screen_top,
    LOC_get_num_colors,
    LOC_standard_color,
    LOC_RGB_color,
    LOC_line_width,
    LOC_erase,
    LOC_move_abs,
    LOC_move_rel,
    LOC_cont_abs,
    LOC_cont_rel,
    LOC_polydots_abs,
    LOC_polydots_rel,
    LOC_polyline_abs,
    LOC_polyline_rel,
    LOC_polygon_abs,
    LOC_polygon_rel,
    LOC_box_abs,
    LOC_box_rel,
    LOC_text_size,
    LOC_text_rotation,
    LOC_set_window,
    LOC_text,
    LOC_get_text_box,
    LOC_font,
    LOC_charset,
    LOC_font_list,
    LOC_font_info,
    LOC_panel_save,
    LOC_panel_restore,
    LOC_panel_delete,
    LOC_begin_scaled_raster,
    LOC_scaled_raster,
    LOC_end_scaled_raster,
    LOC_bitmap,
    LOC_get_location_with_box,
    LOC_get_location_with_line,
    LOC_get_location_with_pointer,
    LOC_pad_create,
    LOC_pad_current,
    LOC_pad_delete,
    LOC_pad_invent,
    LOC_pad_list,
    LOC_pad_select,
    LOC_pad_append_item,
    LOC_pad_delete_item,
    LOC_pad_get_item,
    LOC_pad_list_items,
    LOC_pad_set_item
};

#ifdef HAVE_SOCKET

struct transport rem_trans = {
    REM_open_driver,
    REM__open_quiet,
    REM_stabilize,
    REM_kill_driver,
    REM_close_driver,
    REM_release_driver,
    REM_screen_left,
    REM_screen_rite,
    REM_screen_bot,
    REM_screen_top,
    REM_get_num_colors,
    REM_standard_color,
    REM_RGB_color,
    REM_line_width,
    REM_erase,
    REM_move_abs,
    REM_move_rel,
    REM_cont_abs,
    REM_cont_rel,
    REM_polydots_abs,
    REM_polydots_rel,
    REM_polyline_abs,
    REM_polyline_rel,
    REM_polygon_abs,
    REM_polygon_rel,
    REM_box_abs,
    REM_box_rel,
    REM_text_size,
    REM_text_rotation,
    REM_set_window,
    REM_text,
    REM_get_text_box,
    REM_font,
    REM_charset,
    REM_font_list,
    REM_font_info,
    REM_panel_save,
    REM_panel_restore,
    REM_panel_delete,
    REM_begin_scaled_raster,
    REM_scaled_raster,
    REM_end_scaled_raster,
    REM_bitmap,
    REM_get_location_with_box,
    REM_get_location_with_line,
    REM_get_location_with_pointer,
    REM_pad_create,
    REM_pad_current,
    REM_pad_delete,
    REM_pad_invent,
    REM_pad_list,
    REM_pad_select,
    REM_pad_append_item,
    REM_pad_delete_item,
    REM_pad_get_item,
    REM_pad_list_items,
    REM_pad_set_item
};

#endif

const struct transport *trans;

static const struct transport *get_trans(void)
{
#ifndef HAVE_SOCKET
    return &loc_trans;
#else
    const char *p = getenv("GRASS_RENDER_IMMEDIATE");

    if (!p)
        return &rem_trans;

    if (G_strcasecmp(p, "TRUE") == 0)
        return &loc_trans;

    if (G_strcasecmp(p, "FALSE") == 0)
        return &rem_trans;

    if (G_strcasecmp(p, "PNG") == 0)
        return &loc_trans;

    if (G_strcasecmp(p, "PS") == 0)
        return &loc_trans;

    G_warning("Unrecognised GRASS_RENDER_IMMEDIATE setting: %s", p);

    return &rem_trans;
#endif
}

static void init_transport(void)
{
    if (trans)
        return;

    trans = get_trans();
}

int R_open_driver(void)
{
    init_transport();
    return trans->open_driver();
}

void R__open_quiet(void)
{
    init_transport();
    trans->open_quiet();
}

void R_stabilize(void)
{
    trans->stabilize();
}

void R_kill_driver(void)
{
    trans->kill_driver();
}

void R_close_driver(void)
{
    trans->close_driver();
}

void R_release_driver(void)
{
    trans->release_driver();
}