1 files changed, 171 insertions, 0 deletions
diff --git a/intern/cycles/scene/light.h b/intern/cycles/scene/light.h
new file mode 100644
index 00000000000..97ec9792860
--- /dev/null
+++ b/intern/cycles/scene/light.h
@@ -0,0 +1,171 @@
+/*
+ * 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/types.h"
+
+#include "graph/node.h"
+
+/* included as Light::set_shader defined through NODE_SOCKET_API does not select
+ * the right Node::set overload as it does not know that Shader is a Node */
+#include "scene/shader.h"
+
+#include "util/ies.h"
+#include "util/thread.h"
+#include "util/types.h"
+#include "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();
+
+  NODE_SOCKET_API(LightType, light_type)
+  NODE_SOCKET_API(float3, strength)
+  NODE_SOCKET_API(float3, co)
+
+  NODE_SOCKET_API(float3, dir)
+  NODE_SOCKET_API(float, size)
+  NODE_SOCKET_API(float, angle)
+
+  NODE_SOCKET_API(float3, axisu)
+  NODE_SOCKET_API(float, sizeu)
+  NODE_SOCKET_API(float3, axisv)
+  NODE_SOCKET_API(float, sizev)
+  NODE_SOCKET_API(bool, round)
+  NODE_SOCKET_API(float, spread)
+
+  NODE_SOCKET_API(Transform, tfm)
+
+  NODE_SOCKET_API(int, map_resolution)
+
+  NODE_SOCKET_API(float, spot_angle)
+  NODE_SOCKET_API(float, spot_smooth)
+
+  NODE_SOCKET_API(bool, cast_shadow)
+  NODE_SOCKET_API(bool, use_mis)
+  NODE_SOCKET_API(bool, use_camera)
+  NODE_SOCKET_API(bool, use_diffuse)
+  NODE_SOCKET_API(bool, use_glossy)
+  NODE_SOCKET_API(bool, use_transmission)
+  NODE_SOCKET_API(bool, use_scatter)
+
+  NODE_SOCKET_API(bool, is_shadow_catcher)
+  NODE_SOCKET_API(bool, is_portal)
+  NODE_SOCKET_API(bool, is_enabled)
+
+  NODE_SOCKET_API(Shader *, shader)
+  NODE_SOCKET_API(int, max_bounces)
+  NODE_SOCKET_API(uint, random_id)
+
+  void tag_update(Scene *scene);
+
+  /* Check whether the light has contribution the scene. */
+  bool has_contribution(Scene *scene);
+
+  friend class LightManager;
+};
+
+class LightManager {
+ public:
+  enum : uint32_t {
+    MESH_NEED_REBUILD = (1 << 0),
+    EMISSIVE_MESH_MODIFIED = (1 << 1),
+    LIGHT_MODIFIED = (1 << 2),
+    LIGHT_ADDED = (1 << 3),
+    LIGHT_REMOVED = (1 << 4),
+    OBJECT_MANAGER = (1 << 5),
+    SHADER_COMPILED = (1 << 6),
+    SHADER_MODIFIED = (1 << 7),
+
+    /* tag everything in the manager for an update */
+    UPDATE_ALL = ~0u,
+
+    UPDATE_NONE = 0u,
+  };
+
+  /* Need to update background (including multiple importance map) */
+  bool need_update_background;
+
+  LightManager();
+  ~LightManager();
+
+  /* IES texture management */
+  int add_ies(const string &ies);
+  int add_ies_from_file(const string &filename);
+  void remove_ies(int slot);
+
+  void device_update(Device *device, DeviceScene *dscene, Scene *scene, Progress &progress);
+  void device_free(Device *device, DeviceScene *dscene, const bool free_background = true);
+
+  void tag_update(Scene *scene, uint32_t flag);
+
+  bool need_update() const;
+
+  /* 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 test_enabled_lights(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;
+
+  bool last_background_enabled;
+  int last_background_resolution;
+
+  uint32_t update_flags;
+};
+
+CCL_NAMESPACE_END
+
+#endif /* __LIGHT_H__ */