driver/init.c

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/*!
  \file lib/driver/init.c
 
  \brief Display Driver - initialization
 
  (C) 2006-2011 by the GRASS Development Team
 
  This program is free software under the GNU General Public License
  (>=v2). Read the file COPYING that comes with GRASS for details.
 
  \author Glynn Clements <glynn gclements.plus.com> (original contributor)
  \author Huidae Cho <grass4u gmail.com>
*/
 
#include <grass/config.h>
 
#include <stdio.h>
#include <stdlib.h>
 
#include <grass/gis.h>
#include <grass/fontcap.h>
#include "driverlib.h"
#include "driver.h"
 
const struct driver *driver;
 
struct GFONT_CAP *ftcap;
 
GRASS_DRIVER_EXPORT int screen_width;
GRASS_DRIVER_EXPORT int screen_height;
 
GRASS_DRIVER_EXPORT double cur_x;
GRASS_DRIVER_EXPORT double cur_y;
 
GRASS_DRIVER_EXPORT double text_size_x;
GRASS_DRIVER_EXPORT double text_size_y;
GRASS_DRIVER_EXPORT double text_rotation;
double text_sinrot;
double text_cosrot;
GRASS_DRIVER_EXPORT int matrix_valid;
 
/*!
  \brief Initialize display driver
 
  \param drv pointer to driver structure
*/
void LIB_init(const struct driver *drv)
{
    const char *p;
 
    driver = drv;
    ftcap = parse_fontcap();
 
    /* initialize graphics */
    p = getenv("GRASS_RENDER_WIDTH");
    screen_width = (p && atoi(p)) ? atoi(p) : DEF_WIDTH;
 
    p = getenv("GRASS_RENDER_HEIGHT");
    screen_height = (p && atoi(p)) ? atoi(p) : DEF_HEIGHT;
 
    if (COM_Graph_set() < 0)
        exit(1);
 
    COM_Set_window(0, screen_height, 0, screen_width);
}