/* gl_preview.h - headers for OpenGL preview
 *
 * Copyright (C) 2002 Patrice St-Gelais
 *         patrstg@users.sourceforge.net
 *         www.oricom.ca/patrice.st-gelais
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifndef _GLPREVIEW
#define _GLPREVIEW 1

#include "globals.h"
#include "camera.h"

typedef struct {
	gfloat x;
	gfloat y;
	gfloat z;
	gfloat nx;
	gfloat ny;
	gfloat nz;
	char nb;
} vertex;

typedef struct {
	gint view_size;
	gint mesh_size;
	gint drawing_mesh_size;
	gint scale;
	gboolean direct_upd;
	gboolean show_subdialog;
	camera_struct *cameras[NBCAMERAS];
} gl_defaults_struct;

typedef struct {
	gboolean mouse_dragging1;
	gboolean mouse_dragging2;
	gboolean mouse_dragging3;
	gint last_x;	// Last mouse position, any button
	gint last_y;	// (for managing mouse dragging)
	gint view_size;	// Current size of the viewport (== size of the GL hf in pixels)
			// Default:  1/2 the default HF size, 2x the mesh size
	gint mesh_size;
	gint drawing_mesh_size;
	vertex *hf;
//	gint scale;	// The mesh size, related to the HF size:
			// 4, 3, 2, 1, 0 = 6, 12, 25, 50, 100 %
			// mesh_size = hf_size >> scale
			// Default : 2 -> 25%
	gint mesh_size_backup; // Backup for main mesh size when using low res mesh
	gint hf_list;
	gint current_camera_id;	// From 0 to NBCAMERAS-1 - updated by a radio button
	camera_struct *cameras[NBCAMERAS];
	gboolean refresh_on_mouse_down;
	GtkObject *adj_rot_y;
	GtkObject *adj_rot_x;
	GtkObject *adj_distance;
	GtkObject *adj_translate_x;
	GtkObject *adj_translate_y;
	GtkObject *adj_angle_w;
	GtkWidget *gl_dialog;
	GtkWidget *main_box;
	GtkWidget *refresh_button;
	GtkWidget *direct_upd;
	GtkWidget *gl_area;
	GtkWidget *details_percent_lbl;
} gl_preview_struct;

//	Private methods

GtkWidget *create_glarea  (gpointer callb_data, gint min_size);
gint       glarea_button_release (GtkWidget*, GdkEventButton*, gpointer);
gint       glarea_button_press   (GtkWidget*, GdkEventButton*, gpointer);
gint       glarea_motion_notify  (GtkWidget*, GdkEventMotion*, gpointer);
gint       glarea_draw           (GtkWidget*, GdkEventExpose*,gpointer);
gint       glarea_reshape        (GtkWidget*, GdkEventConfigure*, gpointer);
gint       glarea_init           (GtkWidget*, gpointer);
gint       glarea_destroy        (GtkWidget*, gpointer);
gint       glarea_destroy        (GtkWidget*, gpointer);
void 	refresh_gl_callb(GtkWidget *refresh_button, gpointer hfw);
void	gl_details_min (gpointer hfw);
void 	gl_details_restore (gpointer hfw);
gint 	gl_no_refresh_callb (GtkWidget *wdg, GdkEventButton *event, gpointer data);
gint 	gl_restore_refresh_callb (GtkWidget *wdg, GdkEventButton *event, gpointer data);
void 	gl_preview_optimize (GtkWidget *scale, gpointer data);
void 	gl_preview_free (gl_preview_struct *gl_preview, gboolean creation_mode);

/****************************************************************************************/

// Public methods

void gl_area_update(gpointer hfw) ; // hf_wrapper_struct *
gl_defaults_struct *gl_defaults_init( );
gl_preview_struct *create_preview_dialog (gl_defaults_struct *gl_def, gpointer callb_data);

#endif // _GLPREVIEW