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/*
* Copyright 2011-2013 Blender Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __LIGHT_H__
#define __LIGHT_H__
#include "kernel/kernel_types.h"
#include "graph/node.h"
#include "util/util_ies.h"
#include "util/util_thread.h"
#include "util/util_types.h"
#include "util/util_vector.h"
CCL_NAMESPACE_BEGIN
class Device;
class DeviceScene;
class Object;
class Progress;
class Scene;
class Shader;
class Light : public Node {
public:
NODE_DECLARE;
Light();
LightType type;
float3 co;
float3 dir;
float size;
float3 axisu;
float sizeu;
float3 axisv;
float sizev;
Transform tfm;
int map_resolution;
float spot_angle;
float spot_smooth;
bool cast_shadow;
bool use_mis;
bool use_diffuse;
bool use_glossy;
bool use_transmission;
bool use_scatter;
bool is_portal;
bool is_enabled;
Shader *shader;
int samples;
int max_bounces;
uint random_id;
void tag_update(Scene *scene);
/* Check whether the light has contribution the the scene. */
bool has_contribution(Scene *scene);
};
class LightManager {
public:
bool use_light_visibility;
bool need_update;
LightManager();
~LightManager();
/* IES texture management */
int add_ies(ustring ies);
int add_ies_from_file(ustring filename);
void remove_ies(int slot);
void device_update(Device *device,
DeviceScene *dscene,
Scene *scene,
Progress& progress);
void device_free(Device *device, DeviceScene *dscene);
void tag_update(Scene *scene);
/* Check whether there is a background light. */
bool has_background_light(Scene *scene);
protected:
/* Optimization: disable light which is either unsupported or
* which doesn't contribute to the scene or which is only used for MIS
* and scene doesn't need MIS.
*/
void disable_ineffective_light(Device *device, Scene *scene);
void device_update_points(Device *device,
DeviceScene *dscene,
Scene *scene);
void device_update_distribution(Device *device,
DeviceScene *dscene,
Scene *scene,
Progress& progress);
void device_update_background(Device *device,
DeviceScene *dscene,
Scene *scene,
Progress& progress);
void device_update_ies(DeviceScene *dscene);
/* Check whether light manager can use the object as a light-emissive. */
bool object_usable_as_light(Object *object);
struct IESSlot {
IESFile ies;
uint hash;
int users;
};
vector<IESSlot*> ies_slots;
thread_mutex ies_mutex;
};
CCL_NAMESPACE_END
#endif /* __LIGHT_H__ */
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