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 * Set the frame-buffer used as a render target.
101 * @param[in] resourceId The resource ID of the frame-buffer, or zero if not rendering off-screen.
103 void SetFrameBufferId( unsigned int resourceId );
106 * Retrieve the resource ID of the frame-buffer.
107 * @return The resource ID, or zero if not rendering off-screen.
109 unsigned int GetFrameBufferId() const;
112 * Set the value of property viewport-position
113 * This value will persist only for the current frame.
114 * @param[in] updateBufferIndex The current update buffer index.
115 * @param[in] value The value of the property
117 void SetViewportPosition( BufferIndex updateBufferIndex, const Vector2& value );
120 * Get the value of property viewport-position
121 * @warning Should only be called from the Update thread
122 * @param[in] bufferIndex The buffer to read from.
123 * @return the value of the property.
125 const Vector2& GetViewportPosition( BufferIndex bufferIndex ) const;
128 * Bake the value of the property viewport-position
129 * This will also set the base value
130 * @param[in] updateBufferIndex The current update buffer index.
131 * @param[in] value The new value for property.
133 void BakeViewportPosition( BufferIndex updateBufferIndex, const Vector2& value );
136 * Set the value of property viewport-size
137 * This value will persist only for the current frame.
138 * @param[in] updateBufferIndex The current update buffer index.
139 * @param[in] value The value of the property
141 void SetViewportSize( BufferIndex updateBufferIndex, const Vector2& value );
144 * Get the value of property viewport-size
145 * @warning Should only be called from the Update thread
146 * @param[in] bufferIndex The buffer to read from.
147 * @return the value of the property.
149 const Vector2& GetViewportSize( BufferIndex bufferIndex ) const;
152 * Bake the value of the property viewport-size
153 * This will also set the base value
154 * @param[in] updateBufferIndex The current update buffer index.
155 * @param[in] value The new value for property.
157 void BakeViewportSize( BufferIndex updateBufferIndex, const Vector2& value );
160 * Get the value of property viewport-enabled
161 * @warning Should only be called from the Update thread
162 * @param[in] bufferIndex The buffer to read from.
163 * @return the value of the property.
165 bool GetViewportEnabled( BufferIndex bufferIndex ) const;
168 * Query whether the optional viewport is set.
169 * @param[in] bufferIndex The buffer to read from.
170 * @param[out] viewport The viewport position and size is populated.
171 * @return true if the viewport has been set
173 bool QueryViewport( BufferIndex bufferIndex, Viewport& viewport ) const;
176 * Set the value of property clear-color
177 * This value will persist only for the current frame.
178 * @param[in] updateBufferIndex The current update buffer index.
179 * @param[in] value The value of the property
181 void SetClearColor( BufferIndex updateBufferIndex, const Vector4& value );
184 * Get the value of property clear-color
185 * @warning Should only be called from the Update thread
186 * @param[in] bufferIndex The buffer to read from.
187 * @return the value of the property.
189 const Vector4& GetClearColor( BufferIndex bufferIndex ) const;
192 * Bake the value of the property clear-color
193 * This will also set the base value
194 * @param[in] updateBufferIndex The current update buffer index.
195 * @param[in] value The new value for property.
197 void BakeClearColor( BufferIndex updateBufferIndex, const Vector4& value );
200 * @copydoc Dali::RenderTask::SetClearEnabled()
202 void SetClearEnabled( bool enabled );
205 * @copydoc Dali::RenderTask::GetClearEnabled()
207 bool GetClearEnabled() const;
210 * @copydoc Dali::RenderTask::SetCullMode()
212 void SetCullMode( bool mode );
215 * @copydoc Dali::RenderTask::GetCullMode()
217 bool GetCullMode() const;
220 * Set the refresh-rate of the RenderTask.
221 * @param[in] refreshRate The new refresh rate.
223 void SetRefreshRate( unsigned int refreshRate );
226 * Retrieve the refresh-rate of the RenderTask.
227 * @return The refresh rate.
229 unsigned int GetRefreshRate() const;
232 * Check if the render task is ready for rendering.
233 * @param[in] updateBufferIndex The current update buffer index.
234 * @return True if the render-task is ready for rendering.
236 bool ReadyToRender( BufferIndex updateBufferIndex );
239 * True if a render is required. If the current state is RENDER_CONTINUOUSLY, then
240 * 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.
241 * @return true if a render is required
243 bool IsRenderRequired();
246 * Process a frame. This method is called each frame for every ready render task, regardless
247 * of whether it needs to render (so that the frame counter can be updated).
248 * @param[in] resourcesComplete true if the resources of the source tree are completely loaded.
250 void UpdateState( bool resourcesComplete );
253 * Return true only if currently waiting for the render task to
254 * finish rendering and the update thread should be kept alive.
255 * @return true if waiting to be rendered
257 bool IsWaitingToRender();
260 * Return true when the render task has finished rendering and a notification
261 * needs sending. (Only one notification is sent per render once request)
262 * @return true if notification is required.
267 * @return The number of times we have transited from RENDERED_ONCE to RENDERED_ONCE_AND_NOTIFIED state.
269 unsigned int GetRenderedOnceCounter() const;
272 * Retrieve the view-matrix; this is double buffered for input handling.
273 * @pre GetCameraNode() returns a node with valid CameraAttachment.
274 * @param[in] bufferIndex The buffer to read from.
275 * @return The view-matrix.
277 const Matrix& GetViewMatrix( BufferIndex bufferIndex ) const;
280 * Retrieve the projection-matrix; this is double buffered for input handling.
281 * @pre GetCameraNode() returns a node with valid CameraAttachment.
282 * @param[in] bufferIndex The buffer to read from.
283 * @return The projection-matrix.
285 const Matrix& GetProjectionMatrix( BufferIndex bufferIndex ) const;
288 * Prepares the render-instruction buffer to be populated with instructions.
289 * @param[out] instruction to prepare
290 * @param[in] updateBufferIndex The current update buffer index.
292 void PrepareRenderInstruction( RenderInstruction& instruction, BufferIndex updateBufferIndex );
295 * @return true if the view matrix has been updated during this or last frame
297 bool ViewMatrixUpdated();
300 * Set the complete status tracker.
301 * @param[in] completeStatusManager The complete status Tracker (not owned)
303 void SetCompleteStatusManager( CompleteStatusManager* completeStatusManager );
306 * @return A pointer to the camera used by the RenderTask
308 Node* GetCamera() const;
313 * Protected constructor.
318 RenderTask(const RenderTask&);
321 RenderTask& operator=(const RenderTask&);
323 private: // PropertyOwner
325 virtual void ResetDefaultProperties( BufferIndex currentBufferIndex );
327 public: // Animatable Properties
328 AnimatableProperty< Vector2 > mViewportPosition; ///< viewport-position
329 AnimatableProperty< Vector2 > mViewportSize; ///< viewport-size
330 AnimatableProperty< Vector4 > mClearColor; ///< clear-color
333 CompleteStatusManager* mCompleteStatusManager;
336 CameraAttachment* mCameraAttachment;
337 unsigned int mFrameBufferResourceId;
339 bool mWaitingToRender:1; ///< True when an render once to FBO is waiting
340 bool mNotifyTrigger:1; ///< True if a render once render task has finished renderering
341 bool mExclusive: 1; ///< Whether the render task has exclusive access to the source actor (node in the scene graph implementation).
342 bool mClearEnabled: 1; ///< Whether previous results are cleared.
343 bool mCullMode: 1; ///< Whether renderers should be frustum culled
345 FrameBufferTexture* mRenderTarget;
348 State mState; ///< Render state.
349 unsigned int mRefreshRate; ///< REFRESH_ONCE, REFRESH_ALWAYS or render every N frames
350 unsigned int mFrameCounter; ///< counter for rendering every N frames
352 unsigned int mRenderedOnceCounter; ///< Incremented whenever state changes to RENDERED_ONCE_AND_NOTIFIED
356 // Messages for RenderTask
358 inline void SetFrameBufferIdMessage( EventToUpdate& eventToUpdate, RenderTask& task, unsigned int resourceId )
360 typedef MessageValue1< RenderTask, unsigned int > LocalType;
362 // Reserve some memory inside the message queue
363 unsigned int* slot = eventToUpdate.ReserveMessageSlot( sizeof( LocalType ) );
365 // Construct message in the message queue memory; note that delete should not be called on the return value
366 new (slot) LocalType( &task, &RenderTask::SetFrameBufferId, resourceId );
369 inline void SetClearColorMessage( EventToUpdate& eventToUpdate, RenderTask& task, const Vector4& value )
371 typedef MessageDoubleBuffered1< RenderTask, Vector4 > LocalType;
373 // Reserve some memory inside the message queue
374 unsigned int* slot = eventToUpdate.ReserveMessageSlot( sizeof( LocalType ) );
376 // Construct message in the message queue memory; note that delete should not be called on the return value
377 new (slot) LocalType( &task, &RenderTask::SetClearColor, value );
380 inline void BakeClearColorMessage( EventToUpdate& eventToUpdate, const RenderTask& task, const Vector4& value )
382 typedef MessageDoubleBuffered1< RenderTask, Vector4 > LocalType;
384 // Reserve some memory inside the message queue
385 unsigned int* slot = eventToUpdate.ReserveMessageSlot( sizeof( LocalType ) );
387 // Construct message in the message queue memory; note that delete should not be called on the return value
388 new (slot) LocalType( &task, &RenderTask::BakeClearColor, value );
391 inline void SetClearEnabledMessage( EventToUpdate& eventToUpdate, RenderTask& task, bool enabled )
393 typedef MessageValue1< RenderTask, bool > LocalType;
395 // Reserve some memory inside the message queue
396 unsigned int* slot = eventToUpdate.ReserveMessageSlot( sizeof( LocalType ) );
398 // Construct message in the message queue memory; note that delete should not be called on the return value
399 new (slot) LocalType( &task, &RenderTask::SetClearEnabled, enabled );
402 inline void SetCullModeMessage( EventToUpdate& eventToUpdate, RenderTask& task, bool mode )
404 typedef MessageValue1< RenderTask, bool > LocalType;
406 // Reserve some memory inside the message queue
407 unsigned int* slot = eventToUpdate.ReserveMessageSlot( sizeof( LocalType ) );
409 // Construct message in the message queue memory; note that delete should not be called on the return value
410 new (slot) LocalType( &task, &RenderTask::SetCullMode, mode );
413 inline void SetRefreshRateMessage( EventToUpdate& eventToUpdate, RenderTask& task, unsigned int refreshRate )
415 typedef MessageValue1< RenderTask, unsigned int > LocalType;
417 // Reserve some memory inside the message queue
418 unsigned int* slot = eventToUpdate.ReserveMessageSlot( sizeof( LocalType ) );
420 // Construct message in the message queue memory; note that delete should not be called on the return value
421 new (slot) LocalType( &task, &RenderTask::SetRefreshRate, refreshRate );
424 inline void SetSourceNodeMessage( EventToUpdate& eventToUpdate, RenderTask& task, const Node* constNode )
426 // Scene graph thread can destroy this object.
427 Node* node = const_cast< Node* >( constNode );
429 typedef MessageValue1< RenderTask, Node* > LocalType;
431 // Reserve some memory inside the message queue
432 unsigned int* slot = eventToUpdate.ReserveMessageSlot( sizeof( LocalType ) );
434 // Construct message in the message queue memory; note that delete should not be called on the return value
435 new (slot) LocalType( &task, &RenderTask::SetSourceNode, node );
438 inline void SetCameraNodeMessage( EventToUpdate& eventToUpdate, RenderTask& task, const Node* constNode )
440 // Scene graph thread can destroy this object.
441 Node* node = const_cast< Node* >( constNode );
443 typedef MessageValue1< RenderTask, Node* > LocalType;
445 // Reserve some memory inside the message queue
446 unsigned int* slot = eventToUpdate.ReserveMessageSlot( sizeof( LocalType ) );
448 // Construct message in the message queue memory; note that delete should not be called on the return value
449 new (slot) LocalType( &task, &RenderTask::SetCameraNode, node );
452 inline void SetExclusiveMessage( EventToUpdate& eventToUpdate, RenderTask& task, bool exclusive )
454 typedef MessageValue1< RenderTask, bool > LocalType;
456 // Reserve some memory inside the message queue
457 unsigned int* slot = eventToUpdate.ReserveMessageSlot( sizeof( LocalType ) );
459 // Construct message in the message queue memory; note that delete should not be called on the return value
460 new (slot) LocalType( &task, &RenderTask::SetExclusive, exclusive );
463 inline void BakeViewportPositionMessage( EventToUpdate& eventToUpdate, const RenderTask& task, const Vector2& value )
465 typedef MessageDoubleBuffered1< RenderTask, Vector2 > LocalType;
467 // Reserve some memory inside the message queue
468 unsigned int* slot = eventToUpdate.ReserveMessageSlot( sizeof( LocalType ) );
470 // Construct message in the message queue memory; note that delete should not be called on the return value
471 new (slot) LocalType( &task, &RenderTask::BakeViewportPosition, value );
474 inline void BakeViewportSizeMessage( EventToUpdate& eventToUpdate, const RenderTask& task, const Vector2& value )
476 typedef MessageDoubleBuffered1< RenderTask, Vector2 > LocalType;
478 // Reserve some memory inside the message queue
479 unsigned int* slot = eventToUpdate.ReserveMessageSlot( sizeof( LocalType ) );
481 // Construct message in the message queue memory; note that delete should not be called on the return value
482 new (slot) LocalType( &task, &RenderTask::BakeViewportSize, value );
485 } // namespace SceneGraph
487 } // namespace Internal
491 #endif // __DALI_INTERNAL_SCENE_GRAPH_RENDER_TASK_H__