C++ (Cpp) PNG_Driver Examples

Example #1

File: loc_io.c Project: imincik/pkg-grass

int LOC_open_driver(void)
{
    const char *p = getenv("GRASS_RENDER_IMMEDIATE");
    const struct driver *drv = (p && G_strcasecmp(p, "PS") == 0)
	? PS_Driver()
	: PNG_Driver();

    LIB_init(drv, 0, NULL);

    LOC_init();

    COM_Client_Open();

    return OK;
}

Example #2

File: r_raster.c Project: caomw/grass

/*!
  \brief Open display driver

  Default display driver is Cairo, if not available PNG is used.

  \return 0 on success
  \return 1 no monitor defined
*/
int D_open_driver(void)
{
    const char *p, *m;
    
    G_debug(1, "D_open_driver():");
    p = getenv("GRASS_RENDER_IMMEDIATE");
    m = G__getenv("MONITOR");
    
    if (m && G_strncasecmp(m, "wx", 2) == 0) {
	/* wx monitors always use GRASS_RENDER_IMMEDIATE. */
	p = NULL; /* use default display driver */
    } else if (m) {
	char *env;
	const char *v;
	char *u_m;
	
	if (p)
	    G_warning(_("%s variable defined, %s ignored"),
		      "MONITOR", "GRASS_RENDER_IMMEDIATE");
	/* GRASS variable names should be upper case. */
	u_m = G_store_upper(m);

	env = NULL;
	G_asprintf(&env, "MONITOR_%s_MAPFILE", u_m);
	v = G__getenv(env);
	p = m;

	if (v) {
	    if (G_strcasecmp(p, "ps") == 0)
		G_putenv("GRASS_PSFILE", v);
	    else
		G_putenv("GRASS_PNGFILE", v);
	}
	
	G_asprintf(&env, "MONITOR_%s_ENVFILE", u_m);
	v = G__getenv(env);
	if (v) 
	    read_env_file(v);
    }
    
    const struct driver *drv =
	(p && G_strcasecmp(p, "PNG")   == 0) ? PNG_Driver() :
	(p && G_strcasecmp(p, "PS")    == 0) ? PS_Driver() :
	(p && G_strcasecmp(p, "HTML")  == 0) ? HTML_Driver() :
#ifdef USE_CAIRO
	(p && G_strcasecmp(p, "cairo") == 0) ? Cairo_Driver() :
	Cairo_Driver();
#else
	PNG_Driver();
#endif
	
    if (p && G_strcasecmp(drv->name, p) != 0)
	G_warning(_("Unknown display driver <%s>"), p);
    G_verbose_message(_("Using display driver <%s>..."), drv->name);
    LIB_init(drv);

    init();

    if (!getenv("GRASS_RENDER_IMMEDIATE") && !m)
	return 1;

    return 0;
}