/*************************************************************************/
/*  fog.cpp                                                              */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/

#include "fog.h"

using namespace RendererRD;

Fog *Fog::singleton = nullptr;

Fog::Fog() {
	singleton = this;
}

Fog::~Fog() {
	singleton = nullptr;
}

/* FOG VOLUMES */

RID Fog::fog_volume_allocate() {
	return fog_volume_owner.allocate_rid();
}

void Fog::fog_volume_initialize(RID p_rid) {
	fog_volume_owner.initialize_rid(p_rid, FogVolume());
}

void Fog::fog_free(RID p_rid) {
	FogVolume *fog_volume = fog_volume_owner.get_or_null(p_rid);
	fog_volume->dependency.deleted_notify(p_rid);
	fog_volume_owner.free(p_rid);
}

void Fog::fog_volume_set_shape(RID p_fog_volume, RS::FogVolumeShape p_shape) {
	FogVolume *fog_volume = fog_volume_owner.get_or_null(p_fog_volume);
	ERR_FAIL_COND(!fog_volume);

	if (p_shape == fog_volume->shape) {
		return;
	}

	fog_volume->shape = p_shape;
	fog_volume->dependency.changed_notify(Dependency::DEPENDENCY_CHANGED_AABB);
}

void Fog::fog_volume_set_extents(RID p_fog_volume, const Vector3 &p_extents) {
	FogVolume *fog_volume = fog_volume_owner.get_or_null(p_fog_volume);
	ERR_FAIL_COND(!fog_volume);

	fog_volume->extents = p_extents;
	fog_volume->dependency.changed_notify(Dependency::DEPENDENCY_CHANGED_AABB);
}

void Fog::fog_volume_set_material(RID p_fog_volume, RID p_material) {
	FogVolume *fog_volume = fog_volume_owner.get_or_null(p_fog_volume);
	ERR_FAIL_COND(!fog_volume);
	fog_volume->material = p_material;
}

RID Fog::fog_volume_get_material(RID p_fog_volume) const {
	FogVolume *fog_volume = fog_volume_owner.get_or_null(p_fog_volume);
	ERR_FAIL_COND_V(!fog_volume, RID());

	return fog_volume->material;
}

RS::FogVolumeShape Fog::fog_volume_get_shape(RID p_fog_volume) const {
	FogVolume *fog_volume = fog_volume_owner.get_or_null(p_fog_volume);
	ERR_FAIL_COND_V(!fog_volume, RS::FOG_VOLUME_SHAPE_BOX);

	return fog_volume->shape;
}

AABB Fog::fog_volume_get_aabb(RID p_fog_volume) const {
	FogVolume *fog_volume = fog_volume_owner.get_or_null(p_fog_volume);
	ERR_FAIL_COND_V(!fog_volume, AABB());

	switch (fog_volume->shape) {
		case RS::FOG_VOLUME_SHAPE_ELLIPSOID:
		case RS::FOG_VOLUME_SHAPE_CONE:
		case RS::FOG_VOLUME_SHAPE_CYLINDER:
		case RS::FOG_VOLUME_SHAPE_BOX: {
			AABB aabb;
			aabb.position = -fog_volume->extents;
			aabb.size = fog_volume->extents * 2;
			return aabb;
		}
		default: {
			// Need some size otherwise will get culled
			return AABB(Vector3(-1, -1, -1), Vector3(2, 2, 2));
		}
	}

	return AABB();
}

Vector3 Fog::fog_volume_get_extents(RID p_fog_volume) const {
	const FogVolume *fog_volume = fog_volume_owner.get_or_null(p_fog_volume);
	ERR_FAIL_COND_V(!fog_volume, Vector3());
	return fog_volume->extents;
}