IABSD.fr/xenocara/xserver/include/ptrveloc.h

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• Author : matthieu
  Date : 2010-12-05 15:36:02
  Hash : 42826119
  Message : Upgrade to xorg-server 1.9.2. Tested by ajacoutot@, krw@, shadchin@ and jasper@ on various configurations including multihead with both zaphod and xrandr.

• xserver/include/ptrveloc.h

• /*
   *
   * Copyright © 2006-2009 Simon Thum             simon dot thum at gmx dot de
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice (including the next
   * paragraph) shall be included in all copies or substantial portions of the
   * Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
   * DEALINGS IN THE SOFTWARE.
   */
  
  #ifndef POINTERVELOCITY_H
  #define POINTERVELOCITY_H
  
  #include <input.h> /* DeviceIntPtr */
  
  /* constants for acceleration profiles */
  
  #define AccelProfileNone -1
  #define AccelProfileClassic  0
  #define AccelProfileDeviceSpecific 1
  #define AccelProfilePolynomial 2
  #define AccelProfileSmoothLinear 3
  #define AccelProfileSimple 4
  #define AccelProfilePower 5
  #define AccelProfileLinear 6
  #define AccelProfileSmoothLimited 7
  #define AccelProfileLAST AccelProfileSmoothLimited
  
  /* fwd */
  struct _DeviceVelocityRec;
  
  /**
   * profile
   * returns actual acceleration depending on velocity, acceleration control,...
   */
  typedef float (*PointerAccelerationProfileFunc)
                (DeviceIntPtr dev, struct _DeviceVelocityRec* vel,
                 float velocity, float threshold, float accelCoeff);
  
  /**
   * a motion history, with just enough information to
   * calc mean velocity and decide which motion was along
   * a more or less straight line
   */
  typedef struct _MotionTracker {
      int dx, dy;     /* accumulated delta for each axis */
      int time;         /* time of creation */
      int dir;        /* initial direction bitfield */
  } MotionTracker, *MotionTrackerPtr;
  
  /* number of properties for predictable acceleration */
  #define NPROPS_PREDICTABLE_ACCEL 4
  
  /**
   * Contains all data needed to implement mouse ballistics
   */
  typedef struct _DeviceVelocityRec {
      MotionTrackerPtr tracker;
      int num_tracker;
      int cur_tracker;        /* current index */
      float   velocity;       /* velocity as guessed by algorithm */
      float   last_velocity;  /* previous velocity estimate */
      int     last_dx;      /* last time-difference */
      int     last_dy ;     /* phase of last/current estimate */
      float   corr_mul;       /* config: multiply this into velocity */
      float   const_acceleration;  /* config: (recipr.) const deceleration */
      float   min_acceleration;    /* config: minimum acceleration */
      short   reset_time;     /* config: reset non-visible state after # ms */
      short   use_softening;  /* config: use softening of mouse values */
      float   max_rel_diff;   /* config: max. relative difference */
      float   max_diff;       /* config: max. difference */
      int     initial_range;  /* config: max. offset used as initial velocity */
      Bool    average_accel;  /* config: average acceleration over velocity */
      PointerAccelerationProfileFunc Profile;
      PointerAccelerationProfileFunc deviceSpecificProfile;
      void*   profile_private;/* extended data, see  SetAccelerationProfile() */
      struct {   /* to be able to query this information */
          int     profile_number;
      } statistics;
      long    prop_handlers[NPROPS_PREDICTABLE_ACCEL];
  } DeviceVelocityRec, *DeviceVelocityPtr;
  
  extern _X_EXPORT void
  InitVelocityData(DeviceVelocityPtr vel);
  
  extern _X_EXPORT void
  InitTrackers(DeviceVelocityPtr vel, int ntracker);
  
  extern _X_EXPORT short
  ProcessVelocityData2D(DeviceVelocityPtr vel, int dx, int dy, int time);
  
  extern _X_EXPORT float
  BasicComputeAcceleration(DeviceIntPtr dev, DeviceVelocityPtr vel,
      float velocity, float threshold, float acc);
  
  extern _X_EXPORT void
  FreeVelocityData(DeviceVelocityPtr vel);
  
  extern _X_INTERNAL BOOL
  InitializePredictableAccelerationProperties(DeviceIntPtr dev);
  
  extern _X_INTERNAL BOOL
  DeletePredictableAccelerationProperties(DeviceIntPtr dev);
  
  extern _X_EXPORT int
  SetAccelerationProfile(DeviceVelocityPtr vel, int profile_num);
  
  extern _X_EXPORT DeviceVelocityPtr
  GetDevicePredictableAccelData(DeviceIntPtr dev);
  
  extern _X_EXPORT void
  SetDeviceSpecificAccelerationProfile(DeviceVelocityPtr vel,
                                       PointerAccelerationProfileFunc profile);
  
  extern _X_INTERNAL void
  AccelerationDefaultCleanup(DeviceIntPtr dev);
  
  extern _X_INTERNAL void
  acceleratePointerPredictable(DeviceIntPtr dev, int first_valuator,
                               int num_valuators, int *valuators, int evtime);
  
  extern _X_INTERNAL void
  acceleratePointerLightweight(DeviceIntPtr dev, int first_valuator,
                               int num_valuators, int *valuators, int ignored);
  
  #endif  /* POINTERVELOCITY_H */