1 #ifndef __DALI_INTERNAL_SCENE_GRAPH_RENDER_TASK_H__
2 #define __DALI_INTERNAL_SCENE_GRAPH_RENDER_TASK_H__
5 * Copyright (c) 2014 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/math/viewport.h>
23 #include <dali/public-api/render-tasks/render-task.h>
24 #include <dali/internal/common/buffer-index.h>
25 #include <dali/internal/common/event-to-update.h>
26 #include <dali/internal/common/message.h>
27 #include <dali/internal/update/common/double-buffered.h>
28 #include <dali/internal/update/common/property-owner.h>
29 #include <dali/internal/update/common/animatable-property.h>
36 class FrameBufferTexture;
37 class CompleteStatusManager;
42 class CameraAttachment;
43 class RenderInstruction;
46 * RenderTasks describe how the Dali scene should be rendered.
48 class RenderTask : public PropertyOwner
53 RENDER_CONTINUOUSLY, ///< mRefreshRate > 0
54 RENDER_ONCE_WAITING_FOR_RESOURCES, ///< mRefreshRate = REFRESH_ONCE
55 RENDERED_ONCE, ///< mRefreshRate = REFRESH_ONCE & rendered
56 RENDERED_ONCE_AND_NOTIFIED ///< mRefreshRate = REFRESH_ONCE & rendered & notified
60 * Create a new RenderTask
62 static RenderTask* New();
67 virtual ~RenderTask();
70 * Set the nodes to be rendered.
71 * @param[in] node This node and its children will be rendered.
73 void SetSourceNode( Node* node );
76 * Retrieve the source node.
77 * @return This node and its children will be rendered.
79 Node* GetSourceNode() const;
82 * Set whether the RenderTask has exclusive access to the source nodes.
83 * @param[in] exclusive True if the source nodes will only be rendered by this render-task.
85 void SetExclusive( bool exclusive );
88 * Query whether the RenderTask has exclusive access to the source actors.
89 * @return True if the source actors will only be rendered by this render-task.
91 bool IsExclusive() const;
94 * Set the node from which the scene is viewed.
95 * @param[in] node The scene is viewed from the perspective of this node.
97 void SetCameraNode( Node* node );
100 * Retrieve the camera node.
101 * @return The scene is viewed from the perspective of this node.
103 Node* GetCameraNode() const;
106 * Set the frame-buffer used as a render target.
107 * @param[in] resourceId The resource ID of the frame-buffer, or zero if not rendering off-screen.
109 void SetFrameBufferId( unsigned int resourceId );
112 * Retrieve the resource ID of the frame-buffer.
113 * @return The resource ID, or zero if not rendering off-screen.
115 unsigned int GetFrameBufferId() const;
118 * Set the value of property viewport-position
119 * This value will persist only for the current frame.
120 * @param[in] updateBufferIndex The current update buffer index.
121 * @param[in] value The value of the property
123 void SetViewportPosition( BufferIndex updateBufferIndex, const Vector2& value );
126 * Get the value of property viewport-position
127 * @warning Should only be called from the Update thread
128 * @param[in] bufferIndex The buffer to read from.
129 * @return the value of the property.
131 const Vector2& GetViewportPosition( BufferIndex bufferIndex ) const;
134 * Bake the value of the property viewport-position
135 * This will also set the base value
136 * @param[in] updateBufferIndex The current update buffer index.
137 * @param[in] value The new value for property.
139 void BakeViewportPosition( BufferIndex updateBufferIndex, const Vector2& value );
142 * Set the value of property viewport-size
143 * This value will persist only for the current frame.
144 * @param[in] updateBufferIndex The current update buffer index.
145 * @param[in] value The value of the property
147 void SetViewportSize( BufferIndex updateBufferIndex, const Vector2& value );
150 * Get the value of property viewport-size
151 * @warning Should only be called from the Update thread
152 * @param[in] bufferIndex The buffer to read from.
153 * @return the value of the property.
155 const Vector2& GetViewportSize( BufferIndex bufferIndex ) const;
158 * Bake the value of the property viewport-size
159 * This will also set the base value
160 * @param[in] updateBufferIndex The current update buffer index.
161 * @param[in] value The new value for property.
163 void BakeViewportSize( BufferIndex updateBufferIndex, const Vector2& value );
166 * Get the value of property viewport-enabled
167 * @warning Should only be called from the Update thread
168 * @param[in] bufferIndex The buffer to read from.
169 * @return the value of the property.
171 bool GetViewportEnabled( BufferIndex bufferIndex ) const;
174 * Query whether the optional viewport is set.
175 * @param[in] bufferIndex The buffer to read from.
176 * @param[out] viewport The viewport position and size is populated.
177 * @return true if the viewport has been set
179 bool QueryViewport( BufferIndex bufferIndex, Viewport& viewport ) const;
182 * Set the value of property clear-color
183 * This value will persist only for the current frame.
184 * @param[in] updateBufferIndex The current update buffer index.
185 * @param[in] value The value of the property
187 void SetClearColor( BufferIndex updateBufferIndex, const Vector4& value );
190 * Get the value of property clear-color
191 * @warning Should only be called from the Update thread
192 * @param[in] bufferIndex The buffer to read from.
193 * @return the value of the property.
195 const Vector4& GetClearColor( BufferIndex bufferIndex ) const;
198 * Bake the value of the property clear-color
199 * This will also set the base value
200 * @param[in] updateBufferIndex The current update buffer index.
201 * @param[in] value The new value for property.
203 void BakeClearColor( BufferIndex updateBufferIndex, const Vector4& value );
206 * @copydoc Dali::RenderTask::SetClearEnabled()
208 void SetClearEnabled( bool enabled );
211 * @copydoc Dali::RenderTask::GetClearEnabled()
213 bool GetClearEnabled() const;
216 * Set the refresh-rate of the RenderTask.
217 * @param[in] refreshRate The new refresh rate.
219 void SetRefreshRate( unsigned int refreshRate );
222 * Retrieve the refresh-rate of the RenderTask.
223 * @return The refresh rate.
225 unsigned int GetRefreshRate() const;
228 * Check if the render task is ready for rendering.
229 * @param[in] updateBufferIndex The current update buffer index.
230 * @return True if the render-task is ready for rendering.
232 bool ReadyToRender( BufferIndex updateBufferIndex );
235 * True if a render is required. If the current state is RENDER_CONTINUOUSLY, then
236 * this returns true if the frame count is zero. If the current state is RENDER_ONCE_WAITING_FOR_RESOURCES, then it always returns true. In all other states, it returns false.
237 * @return true if a render is required
239 bool IsRenderRequired();
242 * Process a frame. This method is called each frame for every ready render task, regardless
243 * of whether it needs to render (so that the frame counter can be updated).
244 * @param[in] resourcesComplete true if the resources of the source tree are completely loaded.
246 void UpdateState( bool resourcesComplete );
249 * Return true only if currently waiting for the render task to
250 * finish rendering and the update thread should be kept alive.
251 * @return true if waiting to be rendered
253 bool IsWaitingToRender();
256 * Return true when the render task has finished rendering and a notification
257 * needs sending. (Only one notification is sent per render once request)
258 * @return true if notification is required.
263 * @return The number of times we have transited from RENDERED_ONCE to RENDERED_ONCE_AND_NOTIFIED state.
265 unsigned int GetRenderedOnceCounter() const;
268 * Retrieve the view-matrix; this is double buffered for input handling.
269 * @pre GetCameraNode() returns a node with valid CameraAttachment.
270 * @param[in] bufferIndex The buffer to read from.
271 * @return The view-matrix.
273 const Matrix& GetViewMatrix( BufferIndex bufferIndex ) const;
276 * Retrieve the projection-matrix; this is double buffered for input handling.
277 * @pre GetCameraNode() returns a node with valid CameraAttachment.
278 * @param[in] bufferIndex The buffer to read from.
279 * @return The projection-matrix.
281 const Matrix& GetProjectionMatrix( BufferIndex bufferIndex ) const;
284 * Prepares the render-instruction buffer to be populated with instructions.
285 * @param[out] instruction to prepare
286 * @param[in] updateBufferIndex The current update buffer index.
288 void PrepareRenderInstruction( RenderInstruction& instruction, BufferIndex updateBufferIndex );
291 * @return true if the view matrix has been updated during this or last frame
293 bool ViewMatrixUpdated();
296 * Set the complete status tracker.
297 * @param[in] completeStatusManager The complete status Tracker (not owned)
299 void SetCompleteStatusManager( CompleteStatusManager* completeStatusManager );
304 * Protected constructor.
309 RenderTask(const RenderTask&);
312 RenderTask& operator=(const RenderTask&);
314 private: // PropertyOwner
316 virtual void ResetDefaultProperties( BufferIndex currentBufferIndex );
318 public: // Animatable Properties
319 AnimatableProperty< Vector2 > mViewportPosition; ///< viewport-position
320 AnimatableProperty< Vector2 > mViewportSize; ///< viewport-size
321 AnimatableProperty< Vector4 > mClearColor; ///< clear-color
324 CompleteStatusManager* mCompleteStatusManager;
327 CameraAttachment* mCameraAttachment;
328 unsigned int mFrameBufferResourceId;
330 bool mWaitingToRender:1; ///< True when an render once to FBO is waiting
331 bool mNotifyTrigger:1; ///< True if a render once render task has finished renderering
332 bool mExclusive: 1; ///< Whether the render task has exclusive access to the source actor (node in the scene graph implementation).
333 bool mClearEnabled: 1; ///< Whether previous results are cleared.
335 FrameBufferTexture* mRenderTarget;
338 State mState; ///< Render state.
339 unsigned int mRefreshRate; ///< REFRESH_ONCE, REFRESH_ALWAYS or render every N frames
340 unsigned int mFrameCounter; ///< counter for rendering every N frames
342 unsigned int mRenderedOnceCounter; ///< Incremented whenever state changes to RENDERED_ONCE_AND_NOTIFIED
346 // Messages for RenderTask
348 inline void SetFrameBufferIdMessage( EventToUpdate& eventToUpdate, RenderTask& task, unsigned int resourceId )
350 typedef MessageValue1< RenderTask, unsigned int > LocalType;
352 // Reserve some memory inside the message queue
353 unsigned int* slot = eventToUpdate.ReserveMessageSlot( sizeof( LocalType ) );
355 // Construct message in the message queue memory; note that delete should not be called on the return value
356 new (slot) LocalType( &task, &RenderTask::SetFrameBufferId, resourceId );
359 inline void SetClearColorMessage( EventToUpdate& eventToUpdate, RenderTask& task, const Vector4& value )
361 typedef MessageDoubleBuffered1< RenderTask, Vector4 > LocalType;
363 // Reserve some memory inside the message queue
364 unsigned int* slot = eventToUpdate.ReserveMessageSlot( sizeof( LocalType ) );
366 // Construct message in the message queue memory; note that delete should not be called on the return value
367 new (slot) LocalType( &task, &RenderTask::SetClearColor, value );
370 inline void BakeClearColorMessage( EventToUpdate& eventToUpdate, const RenderTask& task, const Vector4& value )
372 typedef MessageDoubleBuffered1< RenderTask, Vector4 > LocalType;
374 // Reserve some memory inside the message queue
375 unsigned int* slot = eventToUpdate.ReserveMessageSlot( sizeof( LocalType ) );
377 // Construct message in the message queue memory; note that delete should not be called on the return value
378 new (slot) LocalType( &task, &RenderTask::BakeClearColor, value );
381 inline void SetClearEnabledMessage( EventToUpdate& eventToUpdate, RenderTask& task, bool enabled )
383 typedef MessageValue1< RenderTask, bool > LocalType;
385 // Reserve some memory inside the message queue
386 unsigned int* slot = eventToUpdate.ReserveMessageSlot( sizeof( LocalType ) );
388 // Construct message in the message queue memory; note that delete should not be called on the return value
389 new (slot) LocalType( &task, &RenderTask::SetClearEnabled, enabled );
392 inline void SetRefreshRateMessage( EventToUpdate& eventToUpdate, RenderTask& task, unsigned int refreshRate )
394 typedef MessageValue1< RenderTask, unsigned int > LocalType;
396 // Reserve some memory inside the message queue
397 unsigned int* slot = eventToUpdate.ReserveMessageSlot( sizeof( LocalType ) );
399 // Construct message in the message queue memory; note that delete should not be called on the return value
400 new (slot) LocalType( &task, &RenderTask::SetRefreshRate, refreshRate );
403 inline void SetSourceNodeMessage( EventToUpdate& eventToUpdate, RenderTask& task, const Node* constNode )
405 // Scene graph thread can destroy this object.
406 Node* node = const_cast< Node* >( constNode );
408 typedef MessageValue1< RenderTask, Node* > LocalType;
410 // Reserve some memory inside the message queue
411 unsigned int* slot = eventToUpdate.ReserveMessageSlot( sizeof( LocalType ) );
413 // Construct message in the message queue memory; note that delete should not be called on the return value
414 new (slot) LocalType( &task, &RenderTask::SetSourceNode, node );
417 inline void SetCameraNodeMessage( EventToUpdate& eventToUpdate, RenderTask& task, const Node* constNode )
419 // Scene graph thread can destroy this object.
420 Node* node = const_cast< Node* >( constNode );
422 typedef MessageValue1< RenderTask, Node* > LocalType;
424 // Reserve some memory inside the message queue
425 unsigned int* slot = eventToUpdate.ReserveMessageSlot( sizeof( LocalType ) );
427 // Construct message in the message queue memory; note that delete should not be called on the return value
428 new (slot) LocalType( &task, &RenderTask::SetCameraNode, node );
431 inline void SetExclusiveMessage( EventToUpdate& eventToUpdate, RenderTask& task, bool exclusive )
433 typedef MessageValue1< RenderTask, bool > LocalType;
435 // Reserve some memory inside the message queue
436 unsigned int* slot = eventToUpdate.ReserveMessageSlot( sizeof( LocalType ) );
438 // Construct message in the message queue memory; note that delete should not be called on the return value
439 new (slot) LocalType( &task, &RenderTask::SetExclusive, exclusive );
442 inline void BakeViewportPositionMessage( EventToUpdate& eventToUpdate, const RenderTask& task, const Vector2& value )
444 typedef MessageDoubleBuffered1< RenderTask, Vector2 > LocalType;
446 // Reserve some memory inside the message queue
447 unsigned int* slot = eventToUpdate.ReserveMessageSlot( sizeof( LocalType ) );
449 // Construct message in the message queue memory; note that delete should not be called on the return value
450 new (slot) LocalType( &task, &RenderTask::BakeViewportPosition, value );
453 inline void BakeViewportSizeMessage( EventToUpdate& eventToUpdate, const RenderTask& task, const Vector2& value )
455 typedef MessageDoubleBuffered1< RenderTask, Vector2 > LocalType;
457 // Reserve some memory inside the message queue
458 unsigned int* slot = eventToUpdate.ReserveMessageSlot( sizeof( LocalType ) );
460 // Construct message in the message queue memory; note that delete should not be called on the return value
461 new (slot) LocalType( &task, &RenderTask::BakeViewportSize, value );
464 } // namespace SceneGraph
466 } // namespace Internal
470 #endif // __DALI_INTERNAL_SCENE_GRAPH_RENDER_TASK_H__