5 * Copyright (c) 2021 Samsung Electronics Co., Ltd.
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
25 #include <dali/graphics-api/graphics-controller.h>
26 #include <dali/graphics-api/graphics-render-target-create-info.h>
27 #include <dali/public-api/common/vector-wrapper.h>
28 #include <dali/public-api/math/vector2.h>
29 #include <dali/public-api/math/vector4.h>
30 #include <dali/public-api/object/handle.h>
41 namespace Internal DALI_INTERNAL
58 * Scene creates a "world" that can be bound to a surface for rendering.
61 class DALI_CORE_API Scene : public BaseHandle
64 using EventProcessingFinishedSignalType = Signal<void()>; ///< Event Processing finished signal type
65 using KeyEventSignalType = Signal<void(const Dali::KeyEvent&)>; ///< Key event signal type
66 using KeyEventGeneratedSignalType = Signal<bool(const Dali::KeyEvent&)>; ///< key event generated signal type
67 using TouchEventSignalType = Signal<void(const Dali::TouchEvent&)>; ///< Touch signal type
68 using WheelEventSignalType = Signal<void(const Dali::WheelEvent&)>; ///< WheelEvent signal type
70 using FrameCallbackContainer = std::vector<std::pair<std::unique_ptr<CallbackBase>, int32_t> >;
73 * @brief Create an initialized Scene handle.
75 * @param[in] size The size of the set surface for this scene
76 * @param[in] orientation The rotated angle of the set surface for this scene
78 * @return a handle to a newly allocated Dali resource.
80 static Scene New(Size size, int32_t orientation = 0);
83 * @brief Downcast an Object handle to Scene handle.
85 * If handle points to a Scene object the downcast produces
86 * valid handle. If not the returned handle is left uninitialized.
87 * @param[in] handle to An object
88 * @return handle to a Scene object or an uninitialized handle
90 static Scene DownCast(BaseHandle handle);
93 * @brief Create an uninitialized Scene handle.
95 * This can be initialized with Scene::New(). Calling member
96 * functions with an uninitialized Dali::Object is not allowed.
103 * This is non-virtual since derived Handle types must not contain data or virtual methods.
108 * @brief This copy constructor is required for (smart) pointer semantics.
110 * @param [in] handle A reference to the copied handle
112 Scene(const Scene& handle);
115 * @brief This assignment operator is required for (smart) pointer semantics.
117 * @param [in] rhs A reference to the copied handle
118 * @return A reference to this
120 Scene& operator=(const Scene& rhs);
123 * @brief Adds a child Actor to the Scene.
125 * The child will be referenced.
126 * @param[in] actor The child
127 * @pre The actor has been initialized.
128 * @pre The actor does not have a parent.
130 void Add(Actor actor);
133 * @brief Removes a child Actor from the Scene.
135 * The child will be unreferenced.
136 * @param[in] actor The child
137 * @pre The actor has been added to the stage.
139 void Remove(Actor actor);
142 * @brief Returns the size of the Scene in pixels as a Vector.
144 * The x component will be the width of the Scene in pixels.
145 * The y component will be the height of the Scene in pixels.
147 * @return The size of the Scene as a Vector
149 Size GetSize() const;
152 * Sets horizontal and vertical pixels per inch value that is used by the display
153 * @param[in] dpi Horizontal and vertical dpi value
155 void SetDpi(Vector2 dpi);
158 * @brief Retrieves the DPI of the display device to which the scene is connected.
160 * @return The horizontal and vertical DPI
162 Vector2 GetDpi() const;
165 * @brief Sets the background color.
167 * @param[in] color The new background color
169 void SetBackgroundColor(const Vector4& color);
172 * @brief Gets the background color of the render surface.
174 * @return The background color
176 Vector4 GetBackgroundColor() const;
179 * @brief Retrieves the list of render-tasks.
181 * @return A valid handle to a RenderTaskList
183 Dali::RenderTaskList GetRenderTaskList() const;
186 * @brief Returns the Scene's Root Layer.
188 * @return The root layer
190 Layer GetRootLayer() const;
193 * @brief Queries the number of on-stage layers.
195 * Note that a default layer is always provided (count >= 1).
196 * @return The number of layers
198 uint32_t GetLayerCount() const;
201 * @brief Retrieves the layer at a specified depth.
203 * @param[in] depth The depth
204 * @return The layer found at the given depth
205 * @pre Depth is less than layer count; see GetLayerCount().
207 Layer GetLayer(uint32_t depth) const;
210 * @brief Informs the scene that the set surface has been resized.
212 * @param[in] width The new width of the set surface
213 * @param[in] height The new height of the set surface
215 void SurfaceResized(float width, float height);
218 * @brief Informs the scene that the surface has been replaced.
220 void SurfaceReplaced();
223 * @brief Discards this Scene from the Core.
228 * @brief Sets the render target for the surface.
230 * @param[in] renderTarget The render target create info for the surface
232 void SetSurfaceRenderTarget(const Graphics::RenderTargetCreateInfo& createInfo);
235 * @brief Retrieve the Scene that the given actor belongs to.
238 static Integration::Scene Get(Actor actor);
241 * This function is called when an event is queued.
242 * @param[in] event A event to queue.
244 void QueueEvent(const Integration::Event& event);
247 * This function is called by Core when events are processed.
249 void ProcessEvents();
252 * @brief Adds a callback that is called when the frame rendering is done by the graphics driver.
254 * @param[in] callback The function to call
255 * @param[in] frameId The Id to specify the frame. It will be passed when the callback is called.
257 * @note A callback of the following type may be used:
259 * void MyFunction( int32_t frameId );
261 * This callback will be deleted once it is called.
263 * @note Ownership of the callback is passed onto this class.
265 void AddFrameRenderedCallback(std::unique_ptr<CallbackBase> callback, int32_t frameId);
268 * @brief Adds a callback that is called when the frame is displayed on the display.
270 * @param[in] callback The function to call
271 * @param[in] frameId The Id to specify the frame. It will be passed when the callback is called.
273 * @note A callback of the following type may be used:
275 * void MyFunction( int32_t frameId );
277 * This callback will be deleted once it is called.
279 * @note Ownership of the callback is passed onto this class.
281 void AddFramePresentedCallback(std::unique_ptr<CallbackBase> callback, int32_t frameId);
284 * @brief Gets the callback list that is called when the frame rendering is done by the graphics driver.
286 * @param[out] callbacks The callback list
288 * @note This is called in the update thread.
290 void GetFrameRenderedCallback(FrameCallbackContainer& callbacks);
293 * @brief Gets the callback list that is called when the frame is displayed on the display.
295 * @param[out] callbacks The callback list
297 * @note This is called in the update thread.
299 void GetFramePresentedCallback(FrameCallbackContainer& callbacks);
302 * @brief Informs the scene that the set surface has been rotated.
304 * @param[in] width The width of rotated surface
305 * @param[in] height The height of rotated surface
306 * @param[in] orientation The orientation of rotated surface
308 void SurfaceRotated(float width, float height, int32_t orientation);
311 * @brief Gets the current surface orientation. It gets the value from the scene object.
313 * @return The current surface orientation.
315 int32_t GetCurrentSurfaceOrientation() const;
318 * @brief Gets the current surface rectangle. It gets the value from the scene object.
320 * @return The current surface rectangle
322 const Rect<int32_t>& GetCurrentSurfaceRect() const;
325 * Query wheter the surface rect is changed or not.
326 * @return true if the surface rect is changed.
328 bool IsSurfaceRectChanged() const;
331 * @brief Send message to acknowledge for completing window rotation with current window orientation.
333 * If this function is called, the message is sent to render thread, then mSurfaceRectChanged in scene-graph-scene is set with true.
334 * After that, render thread checks whether window rotation event is received, mSurfaceRectChanged and the neccessary flag are set.
335 * If they are all true, rotation done function is called to complete window rotation.
337 void SetRotationCompletedAcknowledgement();
340 * @brief Query wheter is set to acknowledge for completing surface rotation.
341 * @return true it should be acknowledged.
343 * If SetRotationCompletedAcknowledgement() is called and the related message is received to scene-graph-scene,
344 * then mSurfaceRectChanged in scene-graph-scene is set with true.
346 * When this function is called, the mSurfaceRectChanged in scene-graph-scene is return.
347 * Then, the flag will be reset.
349 * @note This function should be not called the application's main thread.
350 * Because this function should be called in windwow surface's postrender() function to complete window rotation manually.
352 bool IsRotationCompletedAcknowledgementSet() const;
355 * @brief This signal is emitted just after the event processing is finished.
357 * @return The signal to connect to
359 EventProcessingFinishedSignalType& EventProcessingFinishedSignal();
362 * @brief This signal is emitted when key event is received.
364 * A callback of the following type may be connected:
366 * void YourCallbackName(const KeyEvent& event);
368 * @return The signal to connect to
370 KeyEventSignalType& KeyEventSignal();
373 * @brief The user would connect to this signal to get a KeyEvent when KeyEvent is generated.
375 * If the control already consumed key event, KeyEventProcessor do not need to Emit keyEvent.
376 * Therefore, KeyinputManager first checks whether KeyEvent is generated as KeyEventGeneratedSignal.
377 * After that keyEventProcessor must invoke KeyEvent only if KeyEventGeneratedSignal () is not consumed.
379 * A callback of the following type may be connected:
381 * bool YourCallbackName(const KeyEvent& event);
384 * @return The return is true if KeyEvent is consumed, otherwise false.
386 KeyEventGeneratedSignalType& KeyEventGeneratedSignal();
389 * @brief This signal is emitted when the screen is touched and when the touch ends
390 * (i.e. the down & up touch events only).
392 * If there are multiple touch points, then this will be emitted when the first touch occurs and
393 * then when the last finger is lifted.
394 * An interrupted event will also be emitted (if it occurs).
395 * A callback of the following type may be connected:
397 * void YourCallbackName( TouchEvent event );
400 * @return The touch signal to connect to
401 * @note Motion events are not emitted.
403 TouchEventSignalType& TouchedSignal();
406 * @brief This signal is emitted when wheel event is received.
408 * A callback of the following type may be connected:
410 * void YourCallbackName(const WheelEvent& event);
412 * @return The signal to connect to
414 WheelEventSignalType& WheelEventSignal();
416 public: // Not intended for application developers
418 * @brief This constructor is used by Dali::New() methods.
420 * @param[in] scene A pointer to an internal Scene resource
422 explicit DALI_INTERNAL Scene(Internal::Scene* scene);
425 } // namespace Integration
429 #endif // DALI_SCENE_H