1 #ifndef DALI_INTEGRATION_ADAPTOR_H
2 #define DALI_INTEGRATION_ADAPTOR_H
5 * Copyright (c) 2020 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/public-api/signals/callback.h>
23 #include <dali/public-api/signals/dali-signal.h>
24 #include <dali/public-api/math/uint-16-pair.h>
25 #include <dali/public-api/math/rect.h>
26 #include <dali/public-api/object/any.h>
27 #include <dali/devel-api/events/touch-point.h>
28 #include <dali/integration-api/processor-interface.h>
31 #include <dali/public-api/adaptor-framework/window.h>
32 #include <dali/public-api/dali-adaptor-common.h>
33 #include <dali/integration-api/adaptor-framework/log-factory-interface.h>
39 class RenderSurfaceInterface;
41 using WindowContainer = std::vector<Window>;
48 using SceneHolderList = std::vector<Dali::Integration::SceneHolder>;
55 class GraphicsFactory;
61 * @brief An Adaptor object is used to initialize and control how Dali runs.
63 * It provides a lifecycle interface that allows the application
64 * writer to provide their own main loop and other platform related
67 * The Adaptor class provides a means for initialising the resources required by the Dali::Core.
69 * When dealing with platform events, the application writer MUST ensure that Dali is called in a
72 * As soon as the Adaptor class is created and started, the application writer can initialise their
73 * Dali::Actor objects straight away or as required by the main loop they intend to use (there is no
74 * need to wait for an initialise signal as per the Dali::Application class).
76 * The Adaptor does emit a Resize signal which informs the user when the surface is resized.
77 * Tizen and Linux Adaptors should follow the example below:
80 * void CreateProgram(DaliAdaptor& adaptor)
82 * // Create Dali components...
83 * // Can instantiate adaptor here instead, if required
88 * // Initialise platform
91 * // Create an 800 by 1280 window positioned at (0,0).
92 * Dali::PositionSize positionSize(0, 0, 800, 1280);
93 * Dali::Window window = Dali::Window::New( positionSize, "My Application" );
95 * // Create an adaptor which uses that window for rendering
96 * Dali::Adaptor adaptor = Dali::Adaptor::New( window );
99 * CreateProgram(adaptor);
100 * // Or use this as a callback function depending on the platform initialisation sequence.
102 * // Start Main Loop of your platform
103 * MyPlatform.StartMainLoop();
109 * If required, you can also connect class member functions to a signal:
112 * MyApplication application;
113 * adaptor.ResizedSignal().Connect(&application, &MyApplication::Resize);
118 class DALI_ADAPTOR_API Adaptor
122 typedef Signal< void (Adaptor&) > AdaptorSignalType; ///< Generic Type for adaptor signals
123 typedef Signal< void (Dali::Integration::SceneHolder&) > WindowCreatedSignalType; ///< SceneHolder created signal type
125 using SurfaceSize = Uint16Pair; ///< Surface size type
129 * @brief Create a new adaptor using the window.
131 * @param[in] window The window to draw onto
132 * @return a reference to the adaptor handle
134 static Adaptor& New( Window window );
137 * @brief Create a new adaptor using render surface.
139 * @param[in] window The window to draw onto
140 * @param[in] surface The surface to draw onto
141 * @return a reference to the adaptor handle
143 static Adaptor& New( Window window, const Dali::RenderSurfaceInterface& surface );
146 * @brief Create a new adaptor using the SceneHolder.
148 * @param[in] sceneHolder The SceneHolder to draw onto
149 * @return a reference to the adaptor handle
151 static Adaptor& New( Dali::Integration::SceneHolder sceneHolder );
154 * @brief Create a new adaptor using render surface.
156 * @param[in] sceneHolder The SceneHolder to draw onto
157 * @param[in] surface The surface to draw onto
158 * @return a reference to the adaptor handle
160 static Adaptor& New( Dali::Integration::SceneHolder sceneHolder, const Dali::RenderSurfaceInterface& surface );
163 * @brief Virtual Destructor.
170 * @brief Starts the Adaptor.
175 * @brief Pauses the Adaptor.
180 * @brief Resumes the Adaptor, if previously paused.
182 * @note If the adaptor is not paused, this does not do anything.
187 * @brief Stops the Adaptor.
192 * @brief Ensures that the function passed in is called from the main loop when it is idle.
193 * @note Function must be called from the main event thread only.
195 * Callbacks of the following types may be used:
199 * This callback will be deleted once it is called.
204 * This callback will be called repeatedly as long as it returns true. A return of 0 deletes this callback.
206 * @param[in] callback The function to call.
207 * @param[in] hasReturnValue Sould be set to true if the callback function has a return value.
208 * @return true if added successfully, false otherwise
210 * @note Ownership of the callback is passed onto this class.
212 bool AddIdle( CallbackBase* callback, bool hasReturnValue );
215 * @brief Adds a new Window instance to the Adaptor
217 * @param[in] childWindow The child window instance
219 bool AddWindow( Dali::Integration::SceneHolder childWindow );
222 * @brief Removes a previously added @p callback.
223 * @note Function must be called from the main event thread only.
225 * Does nothing if the @p callback doesn't exist.
227 * @param[in] callback The callback to be removed.
229 void RemoveIdle( CallbackBase* callback );
232 * @brief Processes the idle callbacks.
234 * @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.
239 * @brief Replaces the rendering surface
241 * @param[in] window The window to replace the surface for
242 * @param[in] surface to use
244 void ReplaceSurface( Window window, Dali::RenderSurfaceInterface& surface );
247 * @brief Replaces the rendering surface
249 * @param[in] sceneHolder The SceneHolder to replace the surface for
250 * @param[in] surface to use
252 void ReplaceSurface( Dali::Integration::SceneHolder sceneHolder, Dali::RenderSurfaceInterface& surface );
255 * @brief Get the render surface the adaptor is using to render to.
257 * @return reference to current render surface
259 Dali::RenderSurfaceInterface& GetSurface();
262 * @brief Gets native window handle
264 * @return Native window handle
266 Any GetNativeWindowHandle();
269 * @brief Retrieve native window handle that the given actor is added to.
271 * @param[in] actor The actor
272 * @return native window handle
274 Any GetNativeWindowHandle( Actor actor );
277 * @brief Get the native display associated with the graphics backend
279 * @return A handle to the native display
281 Any GetGraphicsDisplay();
284 * @brief Release any locks the surface may hold.
286 * For example, after compositing an offscreen surface, use this method to allow
287 * rendering to continue.
289 void ReleaseSurfaceLock();
292 * @brief Set the number of frames per render.
294 * This enables an application to deliberately render with a reduced FPS.
295 * @param[in] numberOfVSyncsPerRender The number of vsyncs between successive renders.
296 * Suggest this is a power of two:
297 * 1 - render each vsync frame
298 * 2 - render every other vsync frame
299 * 4 - render every fourth vsync frame
300 * 8 - render every eighth vsync frame
302 void SetRenderRefreshRate( unsigned int numberOfVSyncsPerRender );
305 * @brief The callback is called from the Update/Render thread prior to rendering.
307 * @param[in] callback The function to call
309 * @note The function is called from the Update thread, so should do as little processing as possible.
310 * It is not possible to call any DALi event side APIs from within the callback; doing so will cause
311 * instability. Only 1 callback is supported. Setting the callback to NULL will remove the current callback.
313 * A callback of the following type should be used:
317 * This callback will be called repeatedly as long as it returns true. A return of 0 deletes this callback.
319 void SetPreRenderCallback( CallbackBase* callback );
322 * @brief Returns a reference to the instance of the adaptor used by the current thread.
324 * @return A reference to the adaptor.
325 * @pre The adaptor has been initialised.
326 * @note This is only valid in the main thread.
328 static Adaptor& Get();
331 * @brief Checks whether the adaptor is available.
333 * @return true, if it is available, false otherwise.
335 static bool IsAvailable();
338 * @brief Call this method to notify Dali when scene is created and initialized.
340 * Notify Adaptor that the scene has been created.
342 void NotifySceneCreated();
345 * @brief Call this method to notify Dali when the system language changes.
347 * Use this only when NOT using Dali::Application, As Application created using
348 * Dali::Application will automatically receive notification of language change.
349 * When Dali::Application is not used, the application developer should
350 * use app-core to receive language change notifications and should update Dali
351 * by calling this method.
353 void NotifyLanguageChanged();
356 * @brief Feed a touch point to the adaptor.
358 * @param[in] point touch point
359 * @param[in] timeStamp time value of event
361 void FeedTouchPoint( TouchPoint& point, int timeStamp );
364 * @brief Feed a wheel event to the adaptor.
366 * @param[in] wheelEvent wheel event
368 void FeedWheelEvent( WheelEvent& wheelEvent );
371 * @brief Feed a key event to the adaptor.
373 * @param[in] keyEvent The key event holding the key information.
375 void FeedKeyEvent( KeyEvent& keyEvent );
378 * @copydoc Dali::Core::SceneCreated();
383 * @brief Informs core the surface size has changed.
385 * @param[in] surface The current render surface
386 * @param[in] surfaceSize The new surface size
388 void SurfaceResizePrepare( Dali::RenderSurfaceInterface* surface, SurfaceSize surfaceSize );
391 * @brief Informs ThreadController the surface size has changed.
393 * @param[in] surface The current render surface
394 * @param[in] surfaceSize The new surface size
396 void SurfaceResizeComplete( Dali::RenderSurfaceInterface* surface, SurfaceSize surfaceSize );
399 * @brief Renders once more even if we're paused
400 * @note Will not work if the window is hidden.
405 * @brief The log factory allows installation of a logger function in worker threads.
406 * @return An interface to a logging factory
408 const LogFactoryInterface& GetLogFactory();
411 * @brief Register a processor implementing the Integration::Processor interface with dali-core.
412 * @param[in] processor the Processor to register
413 * @note using this api does not maintain the processor's lifecycle, must be done elsewhere.
415 void RegisterProcessor( Integration::Processor& processor );
418 * @brief Unregister a previously registered processor from dali-core.
419 * @param[in] processor the Processor to unregister
421 void UnregisterProcessor( Integration::Processor& processor );
424 * @brief Get the list of windows created.
425 * @return The list of windows
427 Dali::WindowContainer GetWindows() const;
430 * @brief Get the list of scene holders.
431 * @return The list of scene holers
433 SceneHolderList GetSceneHolders() const;
436 * @brief Gets the Object registry.
437 * @return The object registry
439 Dali::ObjectRegistry GetObjectRegistry() const;
442 * @brief Called when the window becomes fully or partially visible.
444 void OnWindowShown();
447 * @brief Called when the window is fully hidden.
449 void OnWindowHidden();
454 * @brief The user should connect to this signal if they need to perform any
455 * special activities when the surface Dali is being rendered on is resized.
457 * @return The signal to connect to
459 AdaptorSignalType& ResizedSignal();
462 * @brief This signal is emitted when the language is changed on the device.
464 * @return The signal to connect to
466 AdaptorSignalType& LanguageChangedSignal();
469 * @brief This signal is emitted when a new window (scene holder) is created
471 * @return The signal to connect to
473 WindowCreatedSignalType& WindowCreatedSignal();
478 Adaptor(const Adaptor&);
479 Adaptor& operator=(Adaptor&);
484 * @brief Create an uninitialized Adaptor.
488 Internal::Adaptor::Adaptor* mImpl; ///< Implementation object
489 friend class Internal::Adaptor::Adaptor;
494 #endif // DALI_INTEGRATION_ADAPTOR_H