1 #ifndef DALI_INTEGRATION_ADAPTOR_H
2 #define DALI_INTEGRATION_ADAPTOR_H
5 * Copyright (c) 2023 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.
22 #include <dali/devel-api/events/touch-point.h>
23 #include <dali/integration-api/processor-interface.h>
24 #include <dali/public-api/math/rect.h>
25 #include <dali/public-api/math/uint-16-pair.h>
26 #include <dali/public-api/object/any.h>
27 #include <dali/public-api/signals/callback.h>
28 #include <dali/public-api/signals/dali-signal.h>
31 #include <dali/integration-api/adaptor-framework/log-factory-interface.h>
32 #include <dali/integration-api/adaptor-framework/trace-factory-interface.h>
33 #include <dali/public-api/adaptor-framework/window.h>
34 #include <dali/public-api/dali-adaptor-common.h>
39 class RenderSurfaceInterface;
41 using WindowContainer = std::vector<Window>;
48 using SceneHolderList = std::vector<Dali::Integration::SceneHolder>;
54 class GraphicsFactory;
56 } // namespace Adaptor
57 } // namespace Internal
60 * @brief An Adaptor object is used to initialize and control how Dali runs.
62 * It provides a lifecycle interface that allows the application
63 * writer to provide their own main loop and other platform related
66 * The Adaptor class provides a means for initialising the resources required by the Dali::Core.
68 * When dealing with platform events, the application writer MUST ensure that Dali is called in a
71 * As soon as the Adaptor class is created and started, the application writer can initialise their
72 * Dali::Actor objects straight away or as required by the main loop they intend to use (there is no
73 * need to wait for an initialise signal as per the Dali::Application class).
75 * The Adaptor does emit a Resize signal which informs the user when the surface is resized.
76 * Tizen and Linux Adaptors should follow the example below:
79 * void CreateProgram(DaliAdaptor& adaptor)
81 * // Create Dali components...
82 * // Can instantiate adaptor here instead, if required
87 * // Initialise platform
90 * // Create an 800 by 1280 window positioned at (0,0).
91 * Dali::PositionSize positionSize(0, 0, 800, 1280);
92 * Dali::Window window = Dali::Window::New( positionSize, "My Application" );
94 * // Create an adaptor which uses that window for rendering
95 * Dali::Adaptor adaptor = Dali::Adaptor::New( window );
98 * CreateProgram(adaptor);
99 * // Or use this as a callback function depending on the platform initialisation sequence.
101 * // Start Main Loop of your platform
102 * MyPlatform.StartMainLoop();
108 * If required, you can also connect class member functions to a signal:
111 * MyApplication application;
112 * adaptor.ResizedSignal().Connect(&application, &MyApplication::Resize);
117 class DALI_ADAPTOR_API Adaptor
120 typedef Signal<void(Adaptor&)> AdaptorSignalType; ///< Generic Type for adaptor signals
121 typedef Signal<void(Dali::Integration::SceneHolder&)> WindowCreatedSignalType; ///< SceneHolder created signal type
123 using SurfaceSize = Uint16Pair; ///< Surface size type
127 * @brief Create a new adaptor using the window.
129 * @param[in] window The window to draw onto
130 * @return a reference to the adaptor handle
132 static Adaptor& New(Window window);
135 * @brief Create a new adaptor using render surface.
137 * @param[in] window The window to draw onto
138 * @param[in] surface The surface to draw onto
139 * @return a reference to the adaptor handle
141 static Adaptor& New(Window window, const Dali::RenderSurfaceInterface& surface);
144 * @brief Create a new adaptor using the SceneHolder.
146 * @param[in] sceneHolder The SceneHolder to draw onto
147 * @return a reference to the adaptor handle
149 static Adaptor& New(Dali::Integration::SceneHolder sceneHolder);
152 * @brief Create a new adaptor using render surface.
154 * @param[in] sceneHolder The SceneHolder to draw onto
155 * @param[in] surface The surface to draw onto
156 * @return a reference to the adaptor handle
158 static Adaptor& New(Dali::Integration::SceneHolder sceneHolder, const Dali::RenderSurfaceInterface& surface);
161 * @brief Virtual Destructor.
167 * @brief Starts the Adaptor.
172 * @brief Pauses the Adaptor.
177 * @brief Resumes the Adaptor, if previously paused.
179 * @note If the adaptor is not paused, this does not do anything.
184 * @brief Stops the Adaptor.
189 * @brief Ensures that the function passed in is called from the main loop when it is idle.
190 * @note Function must be called from the main event thread only.
192 * Callbacks of the following types may be used:
196 * This callback will be deleted once it is called.
201 * This callback will be called repeatedly as long as it returns true. A return of 0 deletes this callback.
203 * @param[in] callback The function to call.
204 * @param[in] hasReturnValue Sould be set to true if the callback function has a return value.
205 * @return true if added successfully, false otherwise
207 * @note Ownership of the callback is passed onto this class.
209 bool AddIdle(CallbackBase* callback, bool hasReturnValue);
212 * @brief Adds a new Window instance to the Adaptor
214 * @param[in] childWindow The child window instance
216 bool AddWindow(Dali::Integration::SceneHolder childWindow);
219 * @brief Removes a previously added @p callback.
220 * @note Function must be called from the main event thread only.
222 * Does nothing if the @p callback doesn't exist.
224 * @param[in] callback The callback to be removed.
226 void RemoveIdle(CallbackBase* callback);
229 * @brief Processes the idle callbacks.
231 * @note This function is intended to be used in the case there is no instance of a Dali::Application i.e. DALi is used in a implementation of a plugin of an application.
236 * @brief Replaces the rendering surface
238 * @param[in] window The window to replace the surface for
239 * @param[in] surface to use
241 void ReplaceSurface(Window window, Dali::RenderSurfaceInterface& surface);
244 * @brief Replaces the rendering surface
246 * @param[in] sceneHolder The SceneHolder to replace the surface for
247 * @param[in] surface to use
249 void ReplaceSurface(Dali::Integration::SceneHolder sceneHolder, Dali::RenderSurfaceInterface& surface);
252 * @brief Get the render surface the adaptor is using to render to.
254 * @return reference to current render surface
256 Dali::RenderSurfaceInterface& GetSurface();
259 * @brief Gets native window handle
261 * @return Native window handle
263 Any GetNativeWindowHandle();
266 * @brief Retrieve native window handle that the given actor is added to.
268 * @param[in] actor The actor
269 * @return native window handle
271 Any GetNativeWindowHandle(Actor actor);
274 * @brief Get the native display associated with the graphics backend
276 * @return A handle to the native display
278 Any GetGraphicsDisplay();
281 * @brief Release any locks the surface may hold.
283 * For example, after compositing an offscreen surface, use this method to allow
284 * rendering to continue.
286 void ReleaseSurfaceLock();
289 * @brief Set the number of frames per render.
291 * This enables an application to deliberately render with a reduced FPS.
292 * @param[in] numberOfVSyncsPerRender The number of vsyncs between successive renders.
293 * Suggest this is a power of two:
294 * 1 - render each vsync frame
295 * 2 - render every other vsync frame
296 * 4 - render every fourth vsync frame
297 * 8 - render every eighth vsync frame
299 void SetRenderRefreshRate(unsigned int numberOfVSyncsPerRender);
302 * @brief The callback is called from the Update/Render thread prior to rendering.
304 * @param[in] callback The function to call
306 * @note The function is called from the Update thread, so should do as little processing as possible.
307 * It is not possible to call any DALi event side APIs from within the callback; doing so will cause
308 * instability. Only 1 callback is supported. Setting the callback to NULL will remove the current callback.
310 * A callback of the following type should be used:
314 * This callback will be called repeatedly as long as it returns true. A return of 0 deletes this callback.
316 void SetPreRenderCallback(CallbackBase* callback);
319 * @brief Returns a reference to the instance of the adaptor used by the current thread.
321 * @return A reference to the adaptor.
322 * @pre The adaptor has been initialised.
323 * @note This is only valid in the main thread.
325 static Adaptor& Get();
328 * @brief Checks whether the adaptor is available.
330 * @return true, if it is available, false otherwise.
332 static bool IsAvailable();
335 * @brief Call this method to notify Dali when scene is created and initialized.
337 * Notify Adaptor that the scene has been created.
339 void NotifySceneCreated();
342 * @brief Call this method to notify Dali when the system language changes.
344 * Use this only when NOT using Dali::Application, As Application created using
345 * Dali::Application will automatically receive notification of language change.
346 * When Dali::Application is not used, the application developer should
347 * use app-core to receive language change notifications and should update Dali
348 * by calling this method.
350 void NotifyLanguageChanged();
353 * @brief Feed a touch point to the adaptor.
355 * @param[in] point touch point
356 * @param[in] timeStamp time value of event
358 void FeedTouchPoint(TouchPoint& point, int timeStamp);
361 * @brief Feed a wheel event to the adaptor.
363 * @param[in] wheelEvent wheel event
365 void FeedWheelEvent(WheelEvent& wheelEvent);
368 * @brief Feed a key event to the adaptor.
370 * @param[in] keyEvent The key event holding the key information.
372 void FeedKeyEvent(KeyEvent& keyEvent);
375 * @copydoc Dali::Core::SceneCreated();
380 * @brief Informs core the surface size has changed.
382 * @param[in] surface The current render surface
383 * @param[in] surfaceSize The new surface size
385 void SurfaceResizePrepare(Dali::RenderSurfaceInterface* surface, SurfaceSize surfaceSize);
388 * @brief Informs ThreadController the surface size has changed.
390 * @param[in] surface The current render surface
391 * @param[in] surfaceSize The new surface size
393 void SurfaceResizeComplete(Dali::RenderSurfaceInterface* surface, SurfaceSize surfaceSize);
396 * @brief Renders once more even if we're paused
397 * @note Will not work if the window is hidden.
402 * @brief Relayout and ensure all pending operations are flushed to the update thread.
404 void FlushUpdateMessages();
407 * @brief Requests a future call to Dali::Integration::Core::ProcessEvents(), when the application is idle.
409 void RequestProcessEventsOnIdle();
412 * @brief The log factory allows installation of a logger function in worker threads.
413 * @return An interface to a logging factory
415 const LogFactoryInterface& GetLogFactory();
418 * @brief The trace factory allows installation of a trace function in worker threads.
419 * @return An interface to a tracing factory
421 const TraceFactoryInterface& GetTraceFactory();
424 * @brief Register a processor implementing the Integration::Processor interface with dali-core.
425 * @param[in] processor the Processor to register
426 * @param[in] postProcessor set this processor required to be called after size negotiation. Default is false.
427 * @note using this api does not maintain the processor's lifecycle, must be done elsewhere.
429 void RegisterProcessor(Integration::Processor& processor, bool postProcessor = false);
432 * @brief Unregister a previously registered processor from dali-core.
433 * @param[in] processor the Processor to unregister
434 * @param[in] postProcessor True if the processor to be unregister is for post processor.
436 void UnregisterProcessor(Integration::Processor& processor, bool postProcessor = false);
439 * @brief Get the list of windows created.
440 * @return The list of windows
442 Dali::WindowContainer GetWindows() const;
445 * @brief Get the list of scene holders.
446 * @return The list of scene holers
448 SceneHolderList GetSceneHolders() const;
451 * @brief Gets the Object registry.
452 * @return The object registry
454 Dali::ObjectRegistry GetObjectRegistry() const;
457 * @brief Called when the window becomes fully or partially visible.
459 void OnWindowShown();
462 * @brief Called when the window is fully hidden.
464 void OnWindowHidden();
468 * @brief The user should connect to this signal if they need to perform any
469 * special activities when the surface Dali is being rendered on is resized.
471 * @return The signal to connect to
473 AdaptorSignalType& ResizedSignal();
476 * @brief This signal is emitted when the language is changed on the device.
478 * @return The signal to connect to
480 AdaptorSignalType& LanguageChangedSignal();
483 * @brief This signal is emitted when a new window (scene holder) is created
485 * @return The signal to connect to
487 WindowCreatedSignalType& WindowCreatedSignal();
491 Adaptor(const Adaptor&);
492 Adaptor& operator=(Adaptor&);
496 * @brief Create an uninitialized Adaptor.
500 Internal::Adaptor::Adaptor* mImpl; ///< Implementation object
501 friend class Internal::Adaptor::Adaptor;
506 #endif // DALI_INTEGRATION_ADAPTOR_H