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/*!
\file lib/display/setup.c
\brief Display Driver - setup
(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 <string.h>
#include <grass/gis.h>
#include <grass/raster.h>
#include <grass/display.h>
#include "driver.h"
/*!
\brief Graphics frame setup
This is a high level D call. It does a full setup for the current
graphics frame.
Note: Connection to driver must already be made.
Sets the source coordinate system to the current region, and
adjusts the destination coordinate system to preserve the aspect
ratio.
Performs a full setup for the current graphics frame:
- Makes sure there is a current graphics frame (will create a full-screen
one, if not);
- Sets the region coordinates so that the graphics frame and the active
module region agree (may change active module region to do this); and
- Performs graphic frame/region coordinate conversion initialization.
If <b>clear</b> is true, the frame is cleared (same as running
<i>d.erase</i>.) Otherwise, it is not cleared.
\param clear 1 to clear frame (visually and coordinates)
*/
void D_setup(int clear)
{
struct Cell_head region;
double dt, db, dl, dr;
D_get_frame(&dt, &db, &dl, &dr);
G_get_set_window(®ion);
Rast_set_window(®ion);
D_do_conversions(®ion, dt, db, dl, dr);
D_set_clip_window_to_screen_window();
if (clear)
D_erase(DEFAULT_BG_COLOR);
D_set_clip_window_to_map_window();
}
/*!
\brief Graphics frame setup
Sets the source coordinate system to match the
destination coordinate system, so that D_* functions use the same
coordinate system as R_* functions.
If <b>clear</b> is true, the frame is cleared (same as running
<i>d.erase</i>). Otherwise, it is not cleared.
\param clear non-zero code to clear the frame
*/
void D_setup_unity(int clear)
{
double dt, db, dl, dr;
D_get_frame(&dt, &db, &dl, &dr);
D_set_src(dt, db, dl, dr);
D_set_dst(dt, db, dl, dr);
D_update_conversions();
D_set_clip_window_to_screen_window();
if (clear)
D_erase(DEFAULT_BG_COLOR);
D_set_clip_window_to_map_window();
}
/*!
\brief Sets source coordinate system
Sets the source coordinate system to its arguments, and if
the <b>fit</b> argument is non-zero, adjusts the destination coordinate
system to preserve the aspect ratio.
If <b>clear</b> is true, the frame is cleared (same as running
<i>d.erase</i>). Otherwise, it is not cleared.
\param clear non-zero code to clear the frame
\param fit non-zero code to adjust destination coordinate system
\param s_top
\param s_bottom
\param s_left
\param s_right
*/
void D_setup2(int clear, int fit, double st, double sb, double sl, double sr)
{
double dt, db, dl, dr;
D_get_frame(&dt, &db, &dl, &dr);
D_set_src(st, sb, sl, sr);
D_set_dst(dt, db, dl, dr);
if (fit)
D_fit_d_to_u();
D_update_conversions();
D_set_clip_window_to_screen_window();
if (clear)
D_erase(DEFAULT_BG_COLOR);
D_set_clip_window_to_map_window();
}
/*!
\brief Get driver output file
\return file name or NULL if not defined
*/
const char *D_get_file(void)
{
return COM_Graph_get_file();
}
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