-#ifndef __DALI_INTERNAL_SCENE_GRAPH_PAN_GESTURE_H__
-#define __DALI_INTERNAL_SCENE_GRAPH_PAN_GESTURE_H__
+#ifndef DALI_INTERNAL_SCENE_GRAPH_PAN_GESTURE_H
+#define DALI_INTERNAL_SCENE_GRAPH_PAN_GESTURE_H
/*
- * Copyright (c) 2017 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2020 Samsung Electronics Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
*/
// INTERNAL INCLUDES
+#include <dali/devel-api/threading/mutex.h>
#include <dali/public-api/common/vector-wrapper.h>
-#include <dali/public-api/events/pan-gesture.h>
+#include <dali/internal/event/events/pan-gesture/pan-gesture-impl.h>
#include <dali/internal/update/common/property-owner.h>
#include <dali/internal/update/gestures/gesture-properties.h>
namespace Dali
{
-struct PanGesture;
+class PanGesture;
namespace Internal
{
enum PredictionMode
{
PREDICTION_NONE = 0,
- PREDICTION_1
+ PREDICTION_1,
+ PREDICTION_2,
};
enum SmoothingMode
{
- SMOOTHING_NONE, // no smoothing
- SMOOTHING_LAST_VALUE, // smooth between last value and latest value
+ SMOOTHING_NONE, // No smoothing.
+ SMOOTHING_LAST_VALUE, // Smooth between last value and latest value.
+ SMOOTHING_MULTI_TAP, // Uses multitap smoothing, only available with Prediction mode 2.
};
static const PredictionMode DEFAULT_PREDICTION_MODE;
*/
struct Info
{
- Info()
- {
- }
+ Info() = default;
/**
* Copy constructor
*/
- Info( const Info& rhs )
- : velocity( rhs.velocity ),
- displacement( rhs.displacement ),
- position( rhs.position )
- {
- }
+ Info(const Info& rhs) = default;
/**
* Assignment operator
*/
PanInfo()
: time( 0u ),
- state( Gesture::Clear ),
+ state( GestureState::CLEAR ),
read( true )
{
}
* Assignment operator
* @param[in] gesture A Dali::Gesture
*/
- PanInfo& operator=( const Dali::PanGesture& rhs )
+ PanInfo& operator=( const Internal::PanGesture& rhs )
{
- time = rhs.time;
- state = rhs.state;
+ time = rhs.GetTime();
+ state = rhs.GetState();
- local.velocity = rhs.velocity;
- local.displacement = rhs.displacement;
- local.position = rhs.position;
+ local.velocity = rhs.GetVelocity();
+ local.displacement = rhs.GetDisplacement();
+ local.position = rhs.GetPosition();
- screen.velocity = rhs.screenVelocity;
- screen.displacement = rhs.screenDisplacement;
- screen.position = rhs.screenPosition;
+ screen.velocity = rhs.GetScreenVelocity();
+ screen.displacement = rhs.GetScreenDisplacement();
+ screen.position = rhs.GetScreenPosition();
return *this;
}
// Data
unsigned int time;
- Gesture::State state;
+ GestureState state;
Info local;
Info screen;
volatile bool read;
};
- typedef std::vector<PanInfo> PanInfoHistory;
- typedef PanInfoHistory::iterator PanInfoHistoryIter;
- typedef PanInfoHistory::const_iterator PanInfoHistoryConstIter;
+ using PanInfoHistory = std::vector<PanInfo>;
+ using PanInfoHistoryIter = PanInfoHistory::iterator;
+ using PanInfoHistoryConstIter = PanInfoHistory::const_iterator;
private:
- static const unsigned int PAN_GESTURE_HISTORY = 10u;
+ static const unsigned int PAN_GESTURE_HISTORY = 30u;
public:
/**
* Virtual destructor
*/
- virtual ~PanGesture();
+ ~PanGesture() override;
/**
* Adds a PanGesture to the internal circular-buffer waiting to be handled by UpdateProperties.
* @param[in] gesture The latest pan gesture.
*/
- void AddGesture( const Dali::PanGesture& gesture );
+ void AddGesture( const Internal::PanGesture& gesture );
/**
* @brief Removes pan events from the history that are older than maxAge, leaving at least minEvents
/**
* Uses elapsed time and time stamps
*/
- void PredictiveAlgorithm1(int eventsThisFrame, PanInfo& gestureOut, PanInfoHistory& panHistory, unsigned int lastVSyncTime, unsigned int nextVSyncTime);
+ void PredictionMode1(int eventsThisFrame, PanInfo& gestureOut, PanInfoHistory& panHistory, unsigned int lastVSyncTime, unsigned int nextVSyncTime);
/**
- * Uses last two gestures
+ * Blends two points together.
+ * The blend value ranges are:
+ * 0.0f = use 100% of current value.
+ * 1.0f = use half-way average of current and last value.
*
- * @param[in] justStarted Whether the pan has just started.
- * @param[out] gestureOut Output gesture using average values from last two gestures
- * @param[in] lastVSyncTime The time to set on gestureOut.
- */
- void SmoothingAlgorithm1(bool justStarted, PanInfo& gestureOut, unsigned int lastVSyncTime);
-
- /**
- * Future smoothing method, implementation not complete
+ * @param[in,out] gesture Pass in current gesture, outputs result of blend.
+ * @param[in] lastGesture Pass in gesture to blend between.
*/
- void SmoothingAlgorithm2(bool justStarted, PanInfo& gestureOut, unsigned int lastVSyncTime);
+ void BlendPoints( PanInfo& gesture, PanInfo& lastGesture, float blendValue );
/**
* Called by the update manager so that we can update the value of our properties.
*/
void SetSmoothingAmount(float amount);
+ /*
+ * @brief Sets whether to use actual times of the real gesture and frames or not.
+ *
+ * @param[in] value True = use actual times, False = use perfect values
+ */
+ void SetUseActualTimes( bool value );
+
+ /**
+ * @brief Sets the interpolation time range (ms) of past points to use (with weights) when interpolating.
+ *
+ * @param[in] value Time range in ms
+ */
+ void SetInterpolationTimeRange( int value );
+
+ /**
+ * @brief Sets whether to use scalar only prediction, which when enabled, ignores acceleration.
+ *
+ * @param[in] value True = use scalar prediction only
+ */
+ void SetScalarOnlyPredictionEnabled( bool value );
+
+ /**
+ * @brief Sets whether to use two point prediction. This combines two interpolated points to get more steady acceleration and velocity values.
+ *
+ * @param[in] value True = use two point prediction
+ */
+ void SetTwoPointPredictionEnabled( bool value );
+
+ /**
+ * @brief Sets the time in the past to interpolate the second point when using two point interpolation.
+ *
+ * @param[in] value Time in past in ms
+ */
+ void SetTwoPointInterpolatePastTime( int value );
+
+ /**
+ * @brief Sets the two point velocity bias. This is the ratio of first and second points to use for velocity.
+ *
+ * @param[in] value 0.0f = 100% first point. 1.0f = 100% of second point.
+ */
+ void SetTwoPointVelocityBias( float value );
+
+ /**
+ * @brief Sets the two point acceleration bias. This is the ratio of first and second points to use for acceleration.
+ *
+ * @param[in] value 0.0f = 100% first point. 1.0f = 100% of second point.
+ */
+ void SetTwoPointAccelerationBias( float value );
+
+ /**
+ * @brief Sets the range of time (ms) of points in the history to perform multitap smoothing with (if enabled).
+ *
+ * @param[in] value Time in past in ms
+ */
+ void SetMultitapSmoothingRange( int value );
+
/**
* Called to provide pan-gesture profiling information.
*/
// Undefined
PanGesture(const PanGesture&);
+private:
+
+ // Struct to keep pairs of local and screen data together.
+ // TODO: This can encapsulate some functionality also.
+ using RelativeVectors = struct
+
+ {
+ Vector2 local;
+
+ Vector2 screen;
+ };
+
+ /**
+ * Houses new code to process input events and generate an output point.
+ *
+ * @param[in] lastVSyncTime The time of the last render (in milliseconds)
+ * @param[in] nextVSyncTime The estimated time of the next render (in milliseconds)
+ */
+ bool NewAlgorithm( unsigned int lastVSyncTime, unsigned int nextVSyncTime );
+
+ /**
+ * Gets the (absolute) time difference between two times.
+ * This is limited by minimumDelta, so it can be safe to use as a divisor.
+ * This function is wrapped so that the behviour can be overridden to return a "perfect" time difference (overrideDifference).
+ *
+ * @param[in] timeA The first time to calculate from
+ * @param[in] timeB The second time to calculate from
+ * @param[in] minimumDelta The smallest amount the difference can become
+ * @param[in] overrideDifference The time difference to return if using perfect times
+ */
+ inline float GetDivisibleTimeDifference( int timeA, int timeB, float minimumDelta, float overrideDifference );
+
+ /**
+ * This limits the change currentAcceleration can have over lastAcceleration by the specified changeLimit value.
+ *
+ * @param[in] currentAcceleration The acceleration to modify
+ * @param[in] lastAcceleration The acceleration to limit against
+ * @param[in] changeLimit The maximum change (in either direction)
+ */
+ void LimitAccelerationChange( RelativeVectors& currentAcceleration, RelativeVectors& lastAcceleration, float changeLimit );
+
+ /**
+ * Reads all events received this frame into a linear buffer.
+ * A lock is held while this is done.
+ */
+ unsigned int ReadFrameEvents();
+
+ /**
+ * Converts between input rate and internal rate (typically 60Hz internally).
+ * Also writes to the pan history container.
+ * TODO: Does not need to return the gesture if it is in the history also, but currently it's used.
+ * (if rate conversion does not generate a point there are points still in history, but this can been done with a bool property).
+ *
+ * @param[out] rateConvertedGesture Result gesture for this frame is writen here.
+ * @param[in] eventsThisFrame Number of events to convert
+ * @param[in] currentFrameTime Time of the frame we will render to
+ * @param[in] lastFrameTime Time of the last rendered frame
+ * @param[out] justStarted Set to true if we are now starting a new gesture
+ * @param[out] justFinished Set to true if we are now finishing a gesture
+ */
+ bool InputRateConversion( PanInfo& rateConvertedGesture, unsigned int eventsThisFrame,
+ unsigned int currentFrameTime, unsigned int lastFrameTime, bool& justStarted, bool& justFinished );
+
+ /**
+ * Generates an interpolated point at the specified point in time.
+ *
+ * @param[in] history of points to use
+ * @param[in] currentTime Time of the frame we will render to
+ * @param[in] targetTime Time of the point to generate
+ * @param[in] range Range of time (each side of target time) to use points from
+ * @param[out] outPoint Generated point
+ * @param[out] acceleration Generated acceleration
+ * @param[in] outputTimeGranularity Time difference between output point (typically 60Hz)
+ * @param[in] eraseUnused Set to true to clean up any history not used by the function
+ */
+ bool InterpolatePoint( PanInfoHistory& history, unsigned int currentTime, unsigned int targetTime, unsigned int range,
+ PanInfo& outPoint, RelativeVectors& acceleration, int outputTimeGranularity, bool eraseUnused );
+
+ /**
+ * Predicts a point in the future, based on the supplied point and acceleration.
+ * Other user configuration settings are considered.
+ *
+ * @param[in] startPoint Starting point to use. Position and velocity are taken from here.
+ * @param[in] accelerationToUse The acceleration to use.
+ * @param[out] predictedPoint Generated predicted point
+ * @param[in] currentFrameTime Time of the frame we will render to
+ * @param[in] previousFrameTime Time of the last rendered frame
+ * @param[in] noPreviousData Set to true if we are just starting a gesture
+ */
+ void PredictionMode2( PanInfo& startPoint, RelativeVectors& accelerationToUse,
+ PanInfo& predictedPoint, unsigned int currentFrameTime, unsigned int previousFrameTime, bool noPreviousData );
+
+private:
+
// Undefined
PanGesture& operator=(const PanGesture&);
PanInfoHistory mPanHistory;
PanInfoHistory mPredictionHistory;
PanInfo mGestures[PAN_GESTURE_HISTORY]; ///< Circular buffer storing the 4 most recent gestures.
+ PanInfo mReadGestures[PAN_GESTURE_HISTORY]; ///< Linear buffer storing the most recent gestures (to reduce read lock time).
PanInfo mLastGesture; ///< The last gesture. (last update frame).
PanInfo mTargetGesture; ///< The most recent input gesture, if the current used gesture does not match.
PanInfo mLastUnmodifiedGesture; ///< The last gesture before any processing was done on it.
- unsigned int mWritePosition; ///< The next PanInfo buffer to write to. (starts at 0).
+ PanInfo mLastSecondInterpolatedPoint; ///< Stores the last second interpolated point we generated.
+ PanInfo mLastFrameReadGesture; ///< Stores the last gesture read.
+ PanInfo mLastPredictedPoint; ///< Stores the last predicted point we generated.
+ RelativeVectors mLastAcceleration; ///< Stores the acceleration value from the acceleration limiting last frame.
+ RelativeVectors mLastInterpolatedAcceleration; ///< Stores the second interpolated point acceleration value from the last frame.
+ RelativeVectors mLastInitialAcceleration; ///< Stores the initial acceleration value from the last frame.
+
+ volatile unsigned int mWritePosition; ///< The next PanInfo buffer to write to. (starts at 0).
unsigned int mReadPosition; ///< The next PanInfo buffer to read. (starts at 0).
bool mNotAtTarget; ///< Keeps track of if the last gesture used was the most recent received.
- bool mInGesture; ///< True if the gesture is currently being handled i.e. between Started <-> Finished/Cancelled.
+ bool mInGesture; ///< True if the gesture is currently being handled i.e. between STARTED <-> FINISHED/CANCELLED.
+ bool mPredictionAmountOverridden;
+ bool mSmoothingAmountOverridden;
+
+ PanGestureProfiling* mProfiling; ///< NULL unless pan-gesture profiling information is required.
+ Dali::Mutex mMutex; ///< Mutex to lock access.
+
+ // Environment variables:
PredictionMode mPredictionMode; ///< The pan gesture prediction mode
unsigned int mPredictionAmount; ///< how far into future to predict in milliseconds
unsigned int mPredictionAmountAdjustment; ///< the prediction amount to adjust in milliseconds when pan velocity changes
SmoothingMode mSmoothingMode; ///< The pan gesture prediction mode
float mSmoothingAmount; ///< How much smoothing to apply [0.0f,1.0f]
- PanGestureProfiling* mProfiling; ///< NULL unless pan-gesture profiling information is required.
+ bool mUseActualTimes; ///< Disable to optionally override actual times if they make results worse.
+ int mInterpolationTimeRange; ///< Time into past history (ms) to use points to interpolate the first point.
+ bool mScalarOnlyPredictionEnabled; ///< If enabled, prediction is done using velocity alone (no integration or acceleration).
+ bool mTwoPointPredictionEnabled; ///< If enabled, a second interpolated point is predicted and combined with the first to get more stable values.
+ int mTwoPointPastInterpolateTime; ///< The target time in the past to generate the second interpolated point.
+ float mTwoPointVelocityBias; ///< The ratio of first and second interpolated points to use for velocity. 0.0f = 100% of first point. 1.0f = 100% of second point.
+ float mTwoPointAccelerationBias; ///< The ratio of first and second interpolated points to use for acceleration. 0.0f = 100% of first point. 1.0f = 100% of second point.
+ int mMultiTapSmoothingRange; ///< The range in time (ms) of points in the history to smooth the final output against.
};
} // namespace SceneGraph
} // namespace Dali
-#endif // __DALI_INTERNAL_SCENE_GRAPH_PAN_GESTURE_H__
+#endif // DALI_INTERNAL_SCENE_GRAPH_PAN_GESTURE_H
projects / platform / core / uifw / dali-core.git / blobdiff