pngdriver/driver.c

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/*!
   \file lib/pngdriver/driver.c
 
   \brief GRASS png display driver - driver initialization
 
   (C) 2007-2014 by Glynn Clements and 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
 */
 
#include "pngdriver.h"
 
/*!
   \brief Initialize display driver
 
   \return pointer driver structure
 */
const struct driver *PNG_Driver(void)
{
    static struct driver drv;
    static int initialized;
 
    if (initialized)
        return &drv;
 
    drv.name = "png";
    drv.Box = PNG_Box;
    drv.Erase = PNG_Erase;
    drv.Graph_set = PNG_Graph_set;
    drv.Graph_close = PNG_Graph_close;
    drv.Graph_get_file = PNG_Graph_get_file;
    drv.Line_width = PNG_Line_width;
    drv.Set_window = PNG_Set_window;
    drv.Begin_raster = PNG_begin_raster;
    drv.Raster = PNG_raster;
    drv.End_raster = NULL;
    drv.Begin = PNG_Begin;
    drv.Move = PNG_Move;
    drv.Cont = PNG_Cont;
    drv.Close = PNG_Close;
    drv.Stroke = PNG_Stroke;
    drv.Fill = PNG_Fill;
    drv.Point = PNG_Point;
    drv.Color = PNG_color_rgb;
    drv.Bitmap = PNG_draw_bitmap;
    drv.Text = NULL;
    drv.Text_box = NULL;
    drv.Set_font = NULL;
    drv.Font_list = NULL;
    drv.Font_info = NULL;
 
    initialized = 1;
 
    return &drv;
}