gimp/app/core/gimpdynamics.c

/* GIMP - The GNU Image Manipulation Program
 * Copyright (C) 1995-1999 Spencer Kimball and Peter Mattis
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "config.h"

#include <gegl.h>

#include "libgimpbase/gimpbase.h"
#include "libgimpmath/gimpmath.h"
#include "libgimpconfig/gimpconfig.h"

#include "paint/paint-types.h"


#include "gimp.h"
#include "gimpimage.h"
#include "gimpcurve.h"

#include "gimpdynamics.h"
#include "gimpdynamics-load.h"
#include "gimpdynamics-save.h"

#include "gimpdata.h"
#include "gimp-intl.h"


#define DEFAULT_NAME                "Nameless dynamics"

#define DEFAULT_PRESSURE_OPACITY       TRUE
#define DEFAULT_PRESSURE_HARDNESS      FALSE
#define DEFAULT_PRESSURE_RATE          FALSE
#define DEFAULT_PRESSURE_SIZE          FALSE
#define DEFAULT_PRESSURE_ASPECT_RATIO  FALSE
#define DEFAULT_PRESSURE_COLOR         FALSE
#define DEFAULT_PRESSURE_ANGLE         FALSE
#define DEFAULT_PRESSURE_JITTER        FALSE


#define DEFAULT_VELOCITY_OPACITY       FALSE
#define DEFAULT_VELOCITY_HARDNESS      FALSE
#define DEFAULT_VELOCITY_RATE          FALSE
#define DEFAULT_VELOCITY_SIZE          FALSE
#define DEFAULT_VELOCITY_ASPECT_RATIO  FALSE
#define DEFAULT_VELOCITY_COLOR         FALSE
#define DEFAULT_VELOCITY_ANGLE         FALSE
#define DEFAULT_VELOCITY_JITTER        TRUE

#define DEFAULT_DIRECTION_OPACITY      FALSE
#define DEFAULT_DIRECTION_HARDNESS     FALSE
#define DEFAULT_DIRECTION_RATE         FALSE
#define DEFAULT_DIRECTION_SIZE         FALSE
#define DEFAULT_DIRECTION_ASPECT_RATIO FALSE
#define DEFAULT_DIRECTION_COLOR        FALSE
#define DEFAULT_DIRECTION_ANGLE        FALSE
#define DEFAULT_DIRECTION_JITTER       FALSE

#define DEFAULT_TILT_OPACITY           FALSE
#define DEFAULT_TILT_HARDNESS          FALSE
#define DEFAULT_TILT_RATE              FALSE
#define DEFAULT_TILT_SIZE              FALSE
#define DEFAULT_TILT_ASPECT_RATIO      FALSE
#define DEFAULT_TILT_COLOR             FALSE
#define DEFAULT_TILT_ANGLE             FALSE
#define DEFAULT_TILT_JITTER            FALSE

#define DEFAULT_RANDOM_OPACITY         FALSE
#define DEFAULT_RANDOM_HARDNESS        FALSE
#define DEFAULT_RANDOM_RATE            FALSE
#define DEFAULT_RANDOM_SIZE            FALSE
#define DEFAULT_RANDOM_ASPECT_RATIO    FALSE
#define DEFAULT_RANDOM_COLOR           FALSE
#define DEFAULT_RANDOM_ANGLE           FALSE
#define DEFAULT_RANDOM_JITTER          FALSE

#define DEFAULT_FADING_OPACITY         FALSE
#define DEFAULT_FADING_HARDNESS        FALSE
#define DEFAULT_FADING_RATE            FALSE
#define DEFAULT_FADING_SIZE            FALSE
#define DEFAULT_FADING_ASPECT_RATIO    FALSE
#define DEFAULT_FADING_COLOR           FALSE
#define DEFAULT_FADING_ANGLE           FALSE
#define DEFAULT_FADING_JITTER          FALSE

enum
{
  PROP_0,

  PROP_NAME,

  PROP_PRESSURE_OPACITY,
  PROP_PRESSURE_HARDNESS,
  PROP_PRESSURE_RATE,
  PROP_PRESSURE_SIZE,
  PROP_PRESSURE_ASPECT_RATIO,
  PROP_PRESSURE_COLOR,
  PROP_PRESSURE_ANGLE,
  PROP_PRESSURE_JITTER,

  PROP_VELOCITY_OPACITY,
  PROP_VELOCITY_HARDNESS,
  PROP_VELOCITY_RATE,
  PROP_VELOCITY_SIZE,
  PROP_VELOCITY_ASPECT_RATIO,
  PROP_VELOCITY_COLOR,
  PROP_VELOCITY_ANGLE,
  PROP_VELOCITY_JITTER,

  PROP_DIRECTION_OPACITY,
  PROP_DIRECTION_HARDNESS,
  PROP_DIRECTION_RATE,
  PROP_DIRECTION_SIZE,
  PROP_DIRECTION_ASPECT_RATIO,
  PROP_DIRECTION_COLOR,
  PROP_DIRECTION_ANGLE,
  PROP_DIRECTION_JITTER,

  PROP_TILT_OPACITY,
  PROP_TILT_HARDNESS,
  PROP_TILT_RATE,
  PROP_TILT_SIZE,
  PROP_TILT_ASPECT_RATIO,
  PROP_TILT_COLOR,
  PROP_TILT_ANGLE,
  PROP_TILT_JITTER,

  PROP_RANDOM_OPACITY,
  PROP_RANDOM_HARDNESS,
  PROP_RANDOM_RATE,
  PROP_RANDOM_SIZE,
  PROP_RANDOM_ASPECT_RATIO,
  PROP_RANDOM_COLOR,
  PROP_RANDOM_ANGLE,
  PROP_RANDOM_JITTER,

  PROP_FADING_OPACITY,
  PROP_FADING_HARDNESS,
  PROP_FADING_RATE,
  PROP_FADING_SIZE,
  PROP_FADING_ASPECT_RATIO,
  PROP_FADING_COLOR,
  PROP_FADING_ANGLE,
  PROP_FADING_JITTER,
};

static void    gimp_dynamics_class_init       (GimpDynamicsClass *klass);

static void    gimp_dynamics_finalize         (GObject      *object);


static void    gimp_dynamics_notify           (GObject      *object,
                                               GParamSpec   *pspec);

static void    gimp_dynamics_set_property     (GObject      *object,
                                               guint         property_id,
                                               const GValue *value,
                                               GParamSpec   *pspec);

static void    gimp_dynamics_get_property     (GObject      *object,
                                               guint         property_id,
                                               GValue       *value,
                                               GParamSpec   *pspec);

static const gchar * gimp_dynamics_get_extension (GimpData *data);

static GimpDynamicsOutput* gimp_dynamics_output_init (void);

static void    gimp_dynamics_output_finalize  (GimpDynamicsOutput *dynamics);



G_DEFINE_TYPE (GimpDynamics, gimp_dynamics,
               GIMP_TYPE_DATA)


#define parent_class gimp_dynamics_parent_class


static void
gimp_dynamics_class_init (GimpDynamicsClass *klass)
{
  GObjectClass      *object_class = G_OBJECT_CLASS (klass);
  GimpDataClass     *data_class   = GIMP_DATA_CLASS (klass);

  object_class->finalize     = gimp_dynamics_finalize;
  object_class->set_property = gimp_dynamics_set_property;
  object_class->get_property = gimp_dynamics_get_property;
  object_class->notify       = gimp_dynamics_notify;

  data_class->save                 = gimp_dynamics_save;
  data_class->get_extension        = gimp_dynamics_get_extension;

  GIMP_CONFIG_INSTALL_PROP_STRING  (object_class, PROP_NAME,
                                    "name", NULL,
                                    DEFAULT_NAME,
                                    GIMP_PARAM_STATIC_STRINGS);

  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_PRESSURE_OPACITY,
                                    "pressure-opacity", NULL,
                                    DEFAULT_PRESSURE_OPACITY,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_PRESSURE_HARDNESS,
                                    "pressure-hardness", NULL,
                                    DEFAULT_PRESSURE_HARDNESS,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_PRESSURE_RATE,
                                    "pressure-rate", NULL,
                                    DEFAULT_PRESSURE_RATE,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_PRESSURE_SIZE,
                                    "pressure-size", NULL,
                                    DEFAULT_PRESSURE_SIZE,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_PRESSURE_COLOR,
                                    "pressure-color", NULL,
                                    DEFAULT_PRESSURE_COLOR,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_PRESSURE_ANGLE,
                                    "pressure-angle", NULL,
                                    DEFAULT_PRESSURE_COLOR,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_PRESSURE_ASPECT_RATIO,
                                    "pressure-aspect-ratio", NULL,
                                    DEFAULT_PRESSURE_ASPECT_RATIO,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_PRESSURE_JITTER,
                                    "pressure-jitter", NULL,
                                    DEFAULT_PRESSURE_JITTER,
                                    GIMP_PARAM_STATIC_STRINGS);

  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_VELOCITY_OPACITY,
                                    "velocity-opacity", NULL,
                                    DEFAULT_VELOCITY_OPACITY,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_VELOCITY_HARDNESS,
                                    "velocity-hardness", NULL,
                                    DEFAULT_VELOCITY_HARDNESS,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_VELOCITY_RATE,
                                    "velocity-rate", NULL,
                                    DEFAULT_VELOCITY_RATE,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_VELOCITY_SIZE,
                                    "velocity-size", NULL,
                                    DEFAULT_VELOCITY_SIZE,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_VELOCITY_COLOR,
                                    "velocity-color", NULL,
                                    DEFAULT_VELOCITY_COLOR,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_VELOCITY_ANGLE,
                                    "velocity-angle", NULL,
                                    DEFAULT_VELOCITY_COLOR,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_VELOCITY_ASPECT_RATIO,
                                    "velocity-aspect-ratio", NULL,
                                    DEFAULT_VELOCITY_ASPECT_RATIO,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_VELOCITY_JITTER,
                                    "velocity-jitter", NULL,
                                    DEFAULT_VELOCITY_JITTER,
                                    GIMP_PARAM_STATIC_STRINGS);

  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_DIRECTION_OPACITY,
                                    "direction-opacity", NULL,
                                    DEFAULT_DIRECTION_OPACITY,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_DIRECTION_HARDNESS,
                                    "direction-hardness", NULL,
                                    DEFAULT_DIRECTION_HARDNESS,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_DIRECTION_RATE,
                                    "direction-rate", NULL,
                                    DEFAULT_DIRECTION_RATE,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_DIRECTION_SIZE,
                                    "direction-size", NULL,
                                    DEFAULT_DIRECTION_SIZE,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_DIRECTION_COLOR,
                                    "direction-color", NULL,
                                    DEFAULT_DIRECTION_COLOR,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_DIRECTION_ANGLE,
                                    "direction-angle", NULL,
                                    DEFAULT_DIRECTION_ANGLE,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_DIRECTION_ASPECT_RATIO,
                                    "direction-aspect-ratio", NULL,
                                    DEFAULT_DIRECTION_ASPECT_RATIO,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_DIRECTION_JITTER,
                                    "direction-jitter", NULL,
                                    DEFAULT_DIRECTION_JITTER,
                                    GIMP_PARAM_STATIC_STRINGS);

  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_TILT_OPACITY,
                                    "tilt-opacity", NULL,
                                    DEFAULT_TILT_OPACITY,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_TILT_HARDNESS,
                                    "tilt-hardness", NULL,
                                    DEFAULT_TILT_HARDNESS,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_TILT_RATE,
                                    "tilt-rate", NULL,
                                    DEFAULT_TILT_RATE,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_TILT_SIZE,
                                    "tilt-size", NULL,
                                    DEFAULT_TILT_SIZE,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_TILT_COLOR,
                                    "tilt-color", NULL,
                                    DEFAULT_TILT_COLOR,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_TILT_ANGLE,
                                    "tilt-angle", NULL,
                                    DEFAULT_TILT_ANGLE,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_TILT_ASPECT_RATIO,
                                    "tilt-aspect-ratio", NULL,
                                    DEFAULT_TILT_ASPECT_RATIO,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_TILT_JITTER,
                                    "tilt-jitter", NULL,
                                    DEFAULT_TILT_JITTER,
                                    GIMP_PARAM_STATIC_STRINGS);

  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_RANDOM_OPACITY,
                                    "random-opacity", NULL,
                                    DEFAULT_RANDOM_OPACITY,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_RANDOM_HARDNESS,
                                    "random-hardness", NULL,
                                    DEFAULT_RANDOM_HARDNESS,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_RANDOM_RATE,
                                    "random-rate", NULL,
                                    DEFAULT_RANDOM_RATE,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_RANDOM_SIZE,
                                    "random-size", NULL,
                                    DEFAULT_RANDOM_SIZE,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_RANDOM_COLOR,
                                    "random-color", NULL,
                                    DEFAULT_RANDOM_COLOR,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_RANDOM_ANGLE,
                                    "random-angle", NULL,
                                    DEFAULT_RANDOM_ANGLE,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_RANDOM_ASPECT_RATIO,
                                    "random-aspect-ratio", NULL,
                                    DEFAULT_RANDOM_ASPECT_RATIO,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_RANDOM_JITTER,
                                    "random-jitter", NULL,
                                    DEFAULT_RANDOM_JITTER,
                                    GIMP_PARAM_STATIC_STRINGS);

  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_FADING_OPACITY,
                                    "fading-opacity", NULL,
                                    DEFAULT_FADING_OPACITY,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_FADING_HARDNESS,
                                    "fading-hardness", NULL,
                                    DEFAULT_FADING_HARDNESS,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_FADING_RATE,
                                    "fading-rate", NULL,
                                    DEFAULT_FADING_RATE,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_FADING_SIZE,
                                    "fading-size", NULL,
                                    DEFAULT_FADING_SIZE,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_FADING_COLOR,
                                    "fading-color", NULL,
                                    DEFAULT_FADING_COLOR,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_FADING_ANGLE,
                                    "fading-angle", NULL,
                                    DEFAULT_FADING_ANGLE,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_FADING_ASPECT_RATIO,
                                    "fading-aspect-ratio", NULL,
                                    DEFAULT_FADING_ASPECT_RATIO,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_FADING_JITTER,
                                    "fading-jitter", NULL,
                                    DEFAULT_FADING_JITTER,
                                    GIMP_PARAM_STATIC_STRINGS);

}

static void
gimp_dynamics_init (GimpDynamics *dynamics)
{
  dynamics->opacity_dynamics      = gimp_dynamics_output_init();

  dynamics->hardness_dynamics     = gimp_dynamics_output_init();

  dynamics->rate_dynamics         = gimp_dynamics_output_init();

  dynamics->size_dynamics         = gimp_dynamics_output_init();

  dynamics->aspect_ratio_dynamics = gimp_dynamics_output_init();

  dynamics->color_dynamics        = gimp_dynamics_output_init();

  dynamics->angle_dynamics        = gimp_dynamics_output_init();

  dynamics->jitter_dynamics        = gimp_dynamics_output_init();

}


static void
gimp_dynamics_finalize (GObject *object)
{
  GimpDynamics *dynamics = GIMP_DYNAMICS (object);

  gimp_dynamics_output_finalize   (dynamics->opacity_dynamics);

  gimp_dynamics_output_finalize   (dynamics->hardness_dynamics);

  gimp_dynamics_output_finalize   (dynamics->rate_dynamics);

  gimp_dynamics_output_finalize   (dynamics->size_dynamics);

  gimp_dynamics_output_finalize   (dynamics->aspect_ratio_dynamics);

  gimp_dynamics_output_finalize   (dynamics->color_dynamics);

  gimp_dynamics_output_finalize   (dynamics->angle_dynamics);

  gimp_dynamics_output_finalize   (dynamics->jitter_dynamics);

  G_OBJECT_CLASS (parent_class)->finalize (object);
}

static GimpDynamicsOutput*
gimp_dynamics_output_init(void)
{
  GimpDynamicsOutput * dynamics = g_slice_new0 (GimpDynamicsOutput);

  dynamics->pressure_curve = g_object_new (GIMP_TYPE_CURVE,
                             "name",       "Pressure curve",
                              NULL);
  dynamics->velocity_curve = g_object_new (GIMP_TYPE_CURVE,
                             "name",       "Velocity curve",
                             NULL);
  dynamics->direction_curve = g_object_new (GIMP_TYPE_CURVE,
                              "name",       "Direction curve",
                              NULL);
  dynamics->tilt_curve      = g_object_new (GIMP_TYPE_CURVE,
                              "name",       "Tilt curve",
                              NULL);
  dynamics->random_curve    = g_object_new (GIMP_TYPE_CURVE,
                              "name",       "Random curve",
                              NULL);
  dynamics->fade_curve      = g_object_new (GIMP_TYPE_CURVE,
                              "name",       "Fade curve",
                              NULL);
  return dynamics;
}

static void
gimp_dynamics_output_finalize  (GimpDynamicsOutput *dynamics)
{
  g_object_unref(dynamics->pressure_curve);

  g_object_unref(dynamics->velocity_curve);

  g_object_unref(dynamics->direction_curve);

  g_object_unref(dynamics->tilt_curve);

  g_object_unref(dynamics->random_curve);

  g_object_unref(dynamics->fade_curve);

  g_slice_free (GimpDynamicsOutput,  dynamics);

}


static void
gimp_dynamics_set_property (GObject      *object,
                            guint         property_id,
                            const GValue *value,
                            GParamSpec   *pspec)
{
  GimpDynamics *dynamics           = GIMP_DYNAMICS (object);

  GimpDynamicsOutput *opacity_dynamics      = dynamics->opacity_dynamics;
  GimpDynamicsOutput *hardness_dynamics     = dynamics->hardness_dynamics;
  GimpDynamicsOutput *rate_dynamics         = dynamics->rate_dynamics;
  GimpDynamicsOutput *size_dynamics         = dynamics->size_dynamics;
  GimpDynamicsOutput *aspect_ratio_dynamics = dynamics->aspect_ratio_dynamics;
  GimpDynamicsOutput *color_dynamics        = dynamics->color_dynamics;
  GimpDynamicsOutput *angle_dynamics        = dynamics->angle_dynamics;
  GimpDynamicsOutput *jitter_dynamics       = dynamics->jitter_dynamics;

  switch (property_id)
    {

    case PROP_NAME:
      gimp_object_set_name (dynamics, g_value_get_string (value));
      break;

    case PROP_PRESSURE_OPACITY:
      opacity_dynamics->pressure = g_value_get_boolean (value);
      break;

    case PROP_PRESSURE_HARDNESS:
      hardness_dynamics->pressure = g_value_get_boolean (value);
      break;

    case PROP_PRESSURE_RATE:
      rate_dynamics->pressure = g_value_get_boolean (value);
      break;

    case PROP_PRESSURE_SIZE:
      size_dynamics->pressure = g_value_get_boolean (value);
      break;

    case PROP_PRESSURE_ASPECT_RATIO:
      aspect_ratio_dynamics->pressure = g_value_get_boolean (value);
      break;

    case PROP_PRESSURE_COLOR:
      color_dynamics->pressure = g_value_get_boolean (value);
      break;

    case PROP_PRESSURE_ANGLE:
      angle_dynamics->pressure = g_value_get_boolean (value);
      break;

    case PROP_PRESSURE_JITTER:
      jitter_dynamics->pressure = g_value_get_boolean (value);
      break;

    case PROP_VELOCITY_OPACITY:
      opacity_dynamics->velocity = g_value_get_boolean (value);
      break;

    case PROP_VELOCITY_HARDNESS:
      hardness_dynamics->velocity = g_value_get_boolean (value);
      break;

    case PROP_VELOCITY_RATE:
      rate_dynamics->velocity = g_value_get_boolean (value);
      break;

    case PROP_VELOCITY_SIZE:
      size_dynamics->velocity = g_value_get_boolean (value);
      break;

    case PROP_VELOCITY_ASPECT_RATIO:
      aspect_ratio_dynamics->velocity = g_value_get_boolean (value);
      break;

    case PROP_VELOCITY_COLOR:
      color_dynamics->velocity = g_value_get_boolean (value);
      break;

    case PROP_VELOCITY_ANGLE:
      angle_dynamics->velocity = g_value_get_boolean (value);
      break;

    case PROP_VELOCITY_JITTER:
      jitter_dynamics->velocity = g_value_get_boolean (value);
      break;

    case PROP_DIRECTION_OPACITY:
      opacity_dynamics->direction = g_value_get_boolean (value);
      break;

    case PROP_DIRECTION_HARDNESS:
      hardness_dynamics->direction = g_value_get_boolean (value);
      break;

    case PROP_DIRECTION_RATE:
      rate_dynamics->direction = g_value_get_boolean (value);
      break;

    case PROP_DIRECTION_SIZE:
      size_dynamics->direction = g_value_get_boolean (value);
      break;

    case PROP_DIRECTION_ASPECT_RATIO:
      aspect_ratio_dynamics->direction = g_value_get_boolean (value);
      break;

    case PROP_DIRECTION_COLOR:
      color_dynamics->direction = g_value_get_boolean (value);
      break;

    case PROP_DIRECTION_ANGLE:
      angle_dynamics->direction = g_value_get_boolean (value);
      break;

    case PROP_DIRECTION_JITTER:
      jitter_dynamics->direction = g_value_get_boolean (value);
      break;

    case PROP_TILT_OPACITY:
      opacity_dynamics->tilt = g_value_get_boolean (value);
      break;

    case PROP_TILT_HARDNESS:
      hardness_dynamics->tilt = g_value_get_boolean (value);
      break;

    case PROP_TILT_RATE:
      rate_dynamics->tilt = g_value_get_boolean (value);
      break;

    case PROP_TILT_SIZE:
      size_dynamics->tilt = g_value_get_boolean (value);
      break;

    case PROP_TILT_ASPECT_RATIO:
      aspect_ratio_dynamics->tilt = g_value_get_boolean (value);
      break;

    case PROP_TILT_COLOR:
      color_dynamics->tilt = g_value_get_boolean (value);
      break;

    case PROP_TILT_ANGLE:
      angle_dynamics->tilt = g_value_get_boolean (value);
      break;

    case PROP_TILT_JITTER:
      jitter_dynamics->tilt = g_value_get_boolean (value);
      break;

    case PROP_RANDOM_OPACITY:
      opacity_dynamics->random = g_value_get_boolean (value);
      break;

    case PROP_RANDOM_HARDNESS:
      hardness_dynamics->random = g_value_get_boolean (value);
      break;

    case PROP_RANDOM_RATE:
      rate_dynamics->random = g_value_get_boolean (value);
      break;

    case PROP_RANDOM_SIZE:
      size_dynamics->random = g_value_get_boolean (value);
      break;

    case PROP_RANDOM_ASPECT_RATIO:
      aspect_ratio_dynamics->random = g_value_get_boolean (value);
      break;

    case PROP_RANDOM_COLOR:
      color_dynamics->random = g_value_get_boolean (value);
      break;

    case PROP_RANDOM_ANGLE:
      angle_dynamics->random = g_value_get_boolean (value);
      break;

    case PROP_RANDOM_JITTER:
      jitter_dynamics->random = g_value_get_boolean (value);
      break;

    case PROP_FADING_OPACITY:
      opacity_dynamics->fade = g_value_get_boolean (value);
      break;

    case PROP_FADING_HARDNESS:
      hardness_dynamics->fade = g_value_get_boolean (value);
      break;

    case PROP_FADING_RATE:
      rate_dynamics->fade = g_value_get_boolean (value);
      break;

    case PROP_FADING_SIZE:
      size_dynamics->fade = g_value_get_boolean (value);
      break;

    case PROP_FADING_ASPECT_RATIO:
      aspect_ratio_dynamics->fade = g_value_get_boolean (value);
      break;

    case PROP_FADING_COLOR:
      color_dynamics->fade = g_value_get_boolean (value);
      break;

    case PROP_FADING_ANGLE:
      angle_dynamics->fade = g_value_get_boolean (value);
      break;

    case PROP_FADING_JITTER:
      jitter_dynamics->fade = g_value_get_boolean (value);
      break;


    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
      break;
    }
}



static void
gimp_dynamics_get_property (GObject    *object,
                                 guint       property_id,
                                 GValue     *value,
                                 GParamSpec *pspec)
{
  GimpDynamics       *dynamics               = GIMP_DYNAMICS (object);
  GimpDynamicsOutput *opacity_dynamics      = dynamics->opacity_dynamics;
  GimpDynamicsOutput *hardness_dynamics     = dynamics->hardness_dynamics;
  GimpDynamicsOutput *rate_dynamics         = dynamics->rate_dynamics;
  GimpDynamicsOutput *size_dynamics         = dynamics->size_dynamics;
  GimpDynamicsOutput *aspect_ratio_dynamics = dynamics->aspect_ratio_dynamics;
  GimpDynamicsOutput *color_dynamics        = dynamics->color_dynamics;
  GimpDynamicsOutput *angle_dynamics        = dynamics->angle_dynamics;
  GimpDynamicsOutput *jitter_dynamics       = dynamics->jitter_dynamics;

  switch (property_id)
    {
    case PROP_NAME:
      g_value_set_string (value, gimp_object_get_name (dynamics));
      break;

    case PROP_PRESSURE_OPACITY:
      g_value_set_boolean (value, opacity_dynamics->pressure);
      break;

    case PROP_PRESSURE_HARDNESS:
      g_value_set_boolean (value, hardness_dynamics->pressure);
      break;

    case PROP_PRESSURE_RATE:
      g_value_set_boolean (value, rate_dynamics->pressure);
      break;

    case PROP_PRESSURE_SIZE:
      g_value_set_boolean (value, size_dynamics->pressure);
      break;

    case PROP_PRESSURE_ASPECT_RATIO:
      g_value_set_boolean (value, aspect_ratio_dynamics->pressure);
      break;

    case PROP_PRESSURE_COLOR:
      g_value_set_boolean (value, color_dynamics->pressure);
      break;

    case PROP_PRESSURE_ANGLE:
      g_value_set_boolean (value, angle_dynamics->pressure);
      break;

    case PROP_PRESSURE_JITTER:
      g_value_set_boolean (value, jitter_dynamics->pressure);
      break;

    case PROP_VELOCITY_OPACITY:
      g_value_set_boolean (value, opacity_dynamics->velocity);
      break;

    case PROP_VELOCITY_HARDNESS:
      g_value_set_boolean (value, hardness_dynamics->velocity);
      break;

    case PROP_VELOCITY_RATE:
      g_value_set_boolean (value, rate_dynamics->velocity);
      break;

    case PROP_VELOCITY_SIZE:
      g_value_set_boolean (value, size_dynamics->velocity);
      break;

    case PROP_VELOCITY_ASPECT_RATIO:
      g_value_set_boolean (value, aspect_ratio_dynamics->velocity);
      break;

    case PROP_VELOCITY_COLOR:
      g_value_set_boolean (value, color_dynamics->velocity);
      break;

    case PROP_VELOCITY_ANGLE:
      g_value_set_boolean (value, angle_dynamics->velocity);
      break;

    case PROP_VELOCITY_JITTER:
      g_value_set_boolean (value, jitter_dynamics->velocity);
      break;

    case PROP_DIRECTION_OPACITY:
      g_value_set_boolean (value, opacity_dynamics->direction);
      break;

    case PROP_DIRECTION_HARDNESS:
      g_value_set_boolean (value, hardness_dynamics->direction);
      break;

    case PROP_DIRECTION_RATE:
      g_value_set_boolean (value, rate_dynamics->direction);
      break;

    case PROP_DIRECTION_SIZE:
      g_value_set_boolean (value, size_dynamics->direction);
      break;

    case PROP_DIRECTION_ASPECT_RATIO:
      g_value_set_boolean (value, aspect_ratio_dynamics->direction);
      break;

    case PROP_DIRECTION_COLOR:
      g_value_set_boolean (value, color_dynamics->direction);
      break;

    case PROP_DIRECTION_ANGLE:
      g_value_set_boolean (value, angle_dynamics->direction);
      break;

    case PROP_DIRECTION_JITTER:
      g_value_set_boolean (value, jitter_dynamics->direction);
      break;

    case PROP_TILT_OPACITY:
      g_value_set_boolean (value, opacity_dynamics->tilt);
      break;

    case PROP_TILT_HARDNESS:
      g_value_set_boolean (value, hardness_dynamics->tilt);
      break;

    case PROP_TILT_RATE:
      g_value_set_boolean (value, rate_dynamics->tilt);
      break;

    case PROP_TILT_SIZE:
      g_value_set_boolean (value, size_dynamics->tilt);
      break;

    case PROP_TILT_ASPECT_RATIO:
      g_value_set_boolean (value, aspect_ratio_dynamics->tilt);
      break;

    case PROP_TILT_COLOR:
      g_value_set_boolean (value, color_dynamics->tilt);
      break;

    case PROP_TILT_ANGLE:
      g_value_set_boolean (value, angle_dynamics->tilt);
      break;

    case PROP_TILT_JITTER:
      g_value_set_boolean (value, jitter_dynamics->tilt);
      break;

    case PROP_RANDOM_OPACITY:
      g_value_set_boolean (value, opacity_dynamics->random);
      break;

    case PROP_RANDOM_HARDNESS:
      g_value_set_boolean (value, hardness_dynamics->random);
      break;

    case PROP_RANDOM_RATE:
      g_value_set_boolean (value, rate_dynamics->random);
      break;

    case PROP_RANDOM_SIZE:
      g_value_set_boolean (value, size_dynamics->random);
      break;

    case PROP_RANDOM_ASPECT_RATIO:
      g_value_set_boolean (value, aspect_ratio_dynamics->random);
      break;

    case PROP_RANDOM_COLOR:
      g_value_set_boolean (value, color_dynamics->random);
      break;

    case PROP_RANDOM_ANGLE:
      g_value_set_boolean (value, angle_dynamics->random);
      break;

    case PROP_RANDOM_JITTER:
      g_value_set_boolean (value, jitter_dynamics->random);
      break;


/*fading*/

    case PROP_FADING_OPACITY:
      g_value_set_boolean (value, opacity_dynamics->fade);
      break;

    case PROP_FADING_HARDNESS:
      g_value_set_boolean (value, hardness_dynamics->fade);
      break;

    case PROP_FADING_RATE:
      g_value_set_boolean (value, rate_dynamics->fade);
      break;

    case PROP_FADING_SIZE:
      g_value_set_boolean (value, size_dynamics->fade);
      break;

    case PROP_FADING_ASPECT_RATIO:
      g_value_set_boolean (value, aspect_ratio_dynamics->fade);
      break;

    case PROP_FADING_COLOR:
      g_value_set_boolean (value, color_dynamics->fade);
      break;

    case PROP_FADING_ANGLE:
      g_value_set_boolean (value, angle_dynamics->fade);
      break;

    case PROP_FADING_JITTER:
      g_value_set_boolean (value, jitter_dynamics->fade);
      break;

    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
      break;
    }
}


static void
gimp_dynamics_notify (GObject    *object,
                      GParamSpec *pspec)
{

  GimpDynamics *dynamics = GIMP_DYNAMICS (object);

}

GimpData *
gimp_dynamics_new (const gchar *name)
{
  GimpDynamics *dynamics;

  dynamics = g_object_new (GIMP_TYPE_DYNAMICS,
                          "name",       name,
                          NULL);

  return dynamics;
}


GimpData *
gimp_dynamics_get_standard (void)
{
  static GimpData *standard_dynamics = NULL;

  if (! standard_dynamics)
    {
      standard_dynamics = gimp_dynamics_new ("Standard dynamics");

      standard_dynamics->dirty = FALSE;
      gimp_data_make_internal (standard_dynamics,
                               "gimp-dynamics-standard");

      g_object_ref (standard_dynamics);
    }

  return standard_dynamics;
}

static const gchar *
gimp_dynamics_get_extension (GimpData *data)
{
  return GIMP_DYNAMICS_FILE_EXTENSION;
}

gdouble
gimp_dynamics_get_linear_output_val (GimpDynamicsOutput *output, GimpCoords coords, gdouble fade_point)
{
  gdouble total = 0.0;
  gdouble factors = 0.0;

  gdouble result = 1.0;

  if (output->pressure)
    {
      total += coords.pressure;
      factors++;
    }

  if (output->velocity)
    {
      total += (1.0 - coords.velocity);
      factors++;
    }

  if (output->direction)
    {
      total += coords.direction + 0.5;
      factors++;
    }

  if (output->tilt)
    {
      total += 1.0 - sqrt (SQR (coords.xtilt) + SQR (coords.ytilt));
      factors++;
    }

  if (output->random)
    {
      total += g_random_double_range (0.0, 1.0);
      factors++;
    }

  if (output->fade)
    {
      total += fade_point;
      factors++;
    }

  if (factors > 0)
    result = total / factors;

  //printf("Dynamics queried(linear). Result: %f, factors: %f, total: %f \n", result, factors, total);
  return result;
}

gdouble
gimp_dynamics_get_angular_output_val (GimpDynamicsOutput *output, GimpCoords coords, gdouble fade_point)
{
  gdouble total = 0.0;
  gdouble factors = 0.0;

  gdouble result = 1.0;

  if (output->pressure)
    {
      total += coords.pressure;
      factors++;
    }

  if (output->velocity)
    {
      total += (1.0 - coords.velocity);
      factors++;
    }

  if (output->direction)
    {
      total += coords.direction + 0.5;
      factors++;
    }
/* For tilt to make sense, it needs to be converted to an angle, not just vector */
  if (output->tilt)
    {

      gdouble tilt_x = coords.xtilt;
      gdouble tilt_y = coords.ytilt;
      gdouble tilt = 0.0;

      if (tilt_x == 0.0)
        {
          if (tilt_y >= 0.0)
            tilt = 0.5;
          else if (tilt_y < 0.0)
            tilt = 0.0;
          else tilt = -1.0;
        }
      else
        {
          tilt = atan ((- 1.0 * tilt_y) /
                                tilt_x) / (2 * G_PI);

           if (tilt_x > 0.0)
             tilt = tilt + 0.5;
         }

      tilt = tilt + 0.5; /* correct the angle, its wrong by 180 degrees */

      while (tilt > 1.0)
        tilt -= 1.0;

      while (tilt < 0.0)
        tilt += 1.0;
      total += tilt;
      factors++;
    }

  if (output->random)
    {
      total += g_random_double_range (0.0, 1.0);
      factors++;
    }

  if (output->fade)
    {
      total += fade_point;
      factors++;
    }

  if (factors > 0)
    result = total / factors;

   return result + 0.5;
}


gdouble
gimp_dynamics_get_aspect_output_val (GimpDynamicsOutput *output, GimpCoords coords, gdouble fade_point)
{
  gdouble total = 0.0;
  gdouble factors = 0.0;

  gdouble result = 1.0;

  if (output->pressure)
    {
      total += 2 * coords.pressure;
      factors++;
    }

  if (output->velocity)
    {
      total += 2 * coords.velocity;
      factors++;
    }

  if (output->direction)
    {
      gdouble direction = 0.0;
      direction = fmod (1 + coords.direction, 0.5) / 0.25;

      if ((coords.direction > 0.0) && (coords.direction < 0.5))
        direction = 1 / direction;

      total += direction;
      factors++;
    }

  if (output->tilt)
    {
      total += sqrt ((1 - fabs (coords.xtilt)) / (1 - fabs (coords.ytilt)));
      factors++;
    }

  if (output->random)
    {
      gdouble random = g_random_double_range (0.0, 1.0);
      if (random <= 0.5)
        {
          random = 1 / (random / 0.5 * (2.0 - 1.0) + 1.0);
        }
      else
        {
          random = (random - 0.5) / (1.0 - 0.5) * (2.0 - 1.0) + 1.0;
        }
      total += random;
      factors++;
    }

  if (output->fade)
    {
      total += fade_point;
      factors++;
    }

  if (factors > 0)
    result = total / factors;

  /* printf("Dynamics queried(aspect). Result: %f, factors: %f, total: %f \n", result, factors, total);*/
  return result;
}


gdouble
gimp_dynamics_get_scale_output_val (GimpDynamicsOutput *output, GimpCoords coords, gdouble fade_point)
{
  gdouble total = 0.0;
  gdouble factors = 0.0;

  gdouble scale = 1.0;

  if (output->pressure)
    {
      total += coords.pressure;
      factors++;
    }

  if (output->velocity)
    {
      total += 1.0 - sqrt (coords.velocity);
      factors++;
    }

  if (output->direction)
    {
      total += coords.direction + 0.5;
      factors++;
    }

  if (output->tilt)
    {
      total += 1.0 - sqrt (SQR (coords.xtilt) + SQR (coords.ytilt));
      factors++;
    }

  if (output->random)
    {
      total += 1.0 - g_random_double_range (0.0, 1.0);
      factors++;
    }

  if (output->fade)
    {
      total += fade_point;
      factors++;
    }

  if (factors > 0)
    scale = total / factors;

  if (scale < 1 / 64.0)
    scale = 1 / 8.0;
  else
    scale = sqrt (scale);

  /* printf("Dynamics queried(scale). Result: %f, factors: %f, total: %f \n", result, factors, total);*/
  return scale;
}

gboolean
gimp_dynamics_output_is_enabled(GimpDynamicsOutput *output)
{
  return (output->pressure || output->velocity || output->direction ||
          output->tilt     || output->random   || output->fade);
}

gboolean
gimp_dynamics_input_fade_enabled(GimpDynamics *dynamics)
{
  return (dynamics->opacity_dynamics->fade      ||
          dynamics->hardness_dynamics->fade     ||
          dynamics->rate_dynamics->fade         ||
          dynamics->size_dynamics->fade         ||
          dynamics->aspect_ratio_dynamics->fade ||
          dynamics->color_dynamics->fade        ||
          dynamics->jitter_dynamics->fade       ||
          dynamics->angle_dynamics->fade);

}