/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/** \file blender/blenkernel/intern/lamp.c
 *  \ingroup bke
 */

#include <stdlib.h>

#include "MEM_guardedalloc.h"

#include "DNA_lamp_types.h"
#include "DNA_material_types.h"
#include "DNA_object_types.h"
#include "DNA_texture_types.h"

#include "BLI_listbase.h"
#include "BLI_math.h"
#include "BLI_utildefines.h"

#include "BKE_animsys.h"
#include "BKE_colortools.h"
#include "BKE_icons.h"
#include "BKE_global.h"
#include "BKE_lamp.h"
#include "BKE_library.h"
#include "BKE_main.h"
#include "BKE_node.h"

void *add_lamp(const char *name)
{
	Lamp *la;
	
	la=  alloc_libblock(&G.main->lamp, ID_LA, name);
	
	la->r= la->g= la->b= la->k= 1.0f;
	la->haint= la->energy= 1.0f;
	la->dist= 25.0f;
	la->spotsize= 45.0f;
	la->spotblend= 0.15f;
	la->att2= 1.0f;
	la->mode= LA_SHAD_BUF;
	la->bufsize= 512;
	la->clipsta= 0.5f;
	la->clipend= 40.0f;
	la->shadspotsize= 45.0f;
	la->samp= 3;
	la->bias= 1.0f;
	la->soft= 3.0f;
	la->compressthresh= 0.05f;
	la->ray_samp= la->ray_sampy= la->ray_sampz= 1; 
	la->area_size=la->area_sizey=la->area_sizez= 1.0f; 
	la->buffers= 1;
	la->buftype= LA_SHADBUF_HALFWAY;
	la->ray_samp_method = LA_SAMP_HALTON;
	la->adapt_thresh = 0.001f;
	la->preview=NULL;
	la->falloff_type = LA_FALLOFF_INVSQUARE;
	la->curfalloff = curvemapping_add(1, 0.0f, 1.0f, 1.0f, 0.0f);
	la->sun_effect_type = 0;
	la->horizon_brightness = 1.0;
	la->spread = 1.0;
	la->sun_brightness = 1.0;
	la->sun_size = 1.0;
	la->backscattered_light = 1.0f;
	la->atm_turbidity = 2.0f;
	la->atm_inscattering_factor = 1.0f;
	la->atm_extinction_factor = 1.0f;
	la->atm_distance_factor = 1.0f;
	la->sun_intensity = 1.0f;
	la->skyblendtype= MA_RAMP_ADD;
	la->skyblendfac= 1.0f;
	la->sky_colorspace= BLI_XYZ_CIE;
	la->sky_exposure= 1.0f;
	
	curvemapping_initialize(la->curfalloff);
	return la;
}

Lamp *copy_lamp(Lamp *la)
{
	Lamp *lan;
	int a;
	
	lan= copy_libblock(&la->id);

	for(a=0; a<MAX_MTEX; a++) {
		if(lan->mtex[a]) {
			lan->mtex[a]= MEM_mallocN(sizeof(MTex), "copylamptex");
			memcpy(lan->mtex[a], la->mtex[a], sizeof(MTex));
			id_us_plus((ID *)lan->mtex[a]->tex);
		}
	}
	
	lan->curfalloff = curvemapping_copy(la->curfalloff);

	if(la->nodetree)
		lan->nodetree= ntreeCopyTree(la->nodetree);
	
	if(la->preview)
		lan->preview = BKE_previewimg_copy(la->preview);
	
	return lan;
}

Lamp *localize_lamp(Lamp *la)
{
	Lamp *lan;
	int a;
	
	lan= copy_libblock(&la->id);
	BLI_remlink(&G.main->lamp, lan);

	for(a=0; a<MAX_MTEX; a++) {
		if(lan->mtex[a]) {
			lan->mtex[a]= MEM_mallocN(sizeof(MTex), "localize_lamp");
			memcpy(lan->mtex[a], la->mtex[a], sizeof(MTex));
			/* free lamp decrements */
			id_us_plus((ID *)lan->mtex[a]->tex);
		}
	}
	
	lan->curfalloff = curvemapping_copy(la->curfalloff);

	if(la->nodetree)
		lan->nodetree= ntreeLocalize(la->nodetree);
	
	lan->preview= NULL;
	
	return lan;
}

void make_local_lamp(Lamp *la)
{
	Main *bmain= G.main;
	Object *ob;
	int is_local= FALSE, is_lib= FALSE;

	/* - only lib users: do nothing
		* - only local users: set flag
		* - mixed: make copy
		*/
	
	if(la->id.lib==NULL) return;
	if(la->id.us==1) {
		id_clear_lib_data(bmain, &la->id);
		return;
	}
	
	ob= bmain->object.first;
	while(ob) {
		if(ob->data==la) {
			if(ob->id.lib) is_lib= TRUE;
			else is_local= TRUE;
		}
		ob= ob->id.next;
	}
	
	if(is_local && is_lib == FALSE) {
		id_clear_lib_data(bmain, &la->id);
	}
	else if(is_local && is_lib) {
		Lamp *la_new= copy_lamp(la);
		la_new->id.us= 0;

		/* Remap paths of new ID using old library as base. */
		BKE_id_lib_local_paths(bmain, la->id.lib, &la_new->id);

		ob= bmain->object.first;
		while(ob) {
			if(ob->data==la) {
				
				if(ob->id.lib==NULL) {
					ob->data= la_new;
					la_new->id.us++;
					la->id.us--;
				}
			}
			ob= ob->id.next;
		}
	}
}

void free_lamp(Lamp *la)
{
	MTex *mtex;
	int a;

	for(a=0; a<MAX_MTEX; a++) {
		mtex= la->mtex[a];
		if(mtex && mtex->tex) mtex->tex->id.us--;
		if(mtex) MEM_freeN(mtex);
	}
	
	BKE_free_animdata((ID *)la);

	curvemapping_free(la->curfalloff);

	/* is no lib link block, but lamp extension */
	if(la->nodetree) {
		ntreeFreeTree(la->nodetree);
		MEM_freeN(la->nodetree);
	}
	
	BKE_previewimg_free(&la->preview);
	BKE_icon_delete(&la->id);
	la->id.icon_id = 0;
}