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gimp/app/core/gimpdynamicsoutput.c

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/* 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 "libgimpmath/gimpmath.h"
#include "libgimpconfig/gimpconfig.h"
#include "core-types.h"
#include "paint/gimppaintoptions.h"
#include "gimpcurve.h"
#include "gimpcurve-map.h"
#include "gimpdynamicsoutput.h"
#include "gimp-intl.h"
#define DEFAULT_USE_PRESSURE FALSE
#define DEFAULT_USE_VELOCITY FALSE
#define DEFAULT_USE_DIRECTION FALSE
#define DEFAULT_USE_TILT FALSE
#define DEFAULT_USE_WHEEL FALSE
#define DEFAULT_USE_RANDOM FALSE
#define DEFAULT_USE_FADE FALSE
enum
{
PROP_0,
PROP_TYPE,
PROP_USE_PRESSURE,
PROP_USE_VELOCITY,
PROP_USE_DIRECTION,
PROP_USE_TILT,
PROP_USE_WHEEL,
PROP_USE_RANDOM,
PROP_USE_FADE,
PROP_PRESSURE_CURVE,
PROP_VELOCITY_CURVE,
PROP_DIRECTION_CURVE,
PROP_TILT_CURVE,
PROP_WHEEL_CURVE,
PROP_RANDOM_CURVE,
PROP_FADE_CURVE
};
static void gimp_dynamics_output_finalize (GObject *object);
static void gimp_dynamics_output_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_dynamics_output_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_dynamics_output_copy_curve (GimpCurve *src,
GimpCurve *dest);
static GimpCurve *
gimp_dynamics_output_create_curve (GimpDynamicsOutput *output,
const gchar *name);
static void gimp_dynamics_output_curve_dirty (GimpCurve *curve,
GimpDynamicsOutput *output);
G_DEFINE_TYPE_WITH_CODE (GimpDynamicsOutput, gimp_dynamics_output,
GIMP_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (GIMP_TYPE_CONFIG, NULL))
#define parent_class gimp_dynamics_output_parent_class
static void
gimp_dynamics_output_class_init (GimpDynamicsOutputClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gimp_dynamics_output_finalize;
object_class->set_property = gimp_dynamics_output_set_property;
object_class->get_property = gimp_dynamics_output_get_property;
g_object_class_install_property (object_class, PROP_TYPE,
g_param_spec_enum ("type", NULL,
_("Output type"),
GIMP_TYPE_DYNAMICS_OUTPUT_TYPE,
GIMP_DYNAMICS_OUTPUT_OPACITY,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_USE_PRESSURE,
"use-pressure", NULL,
DEFAULT_USE_PRESSURE,
GIMP_PARAM_STATIC_STRINGS);
GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_USE_VELOCITY,
"use-velocity", NULL,
DEFAULT_USE_VELOCITY,
GIMP_PARAM_STATIC_STRINGS);
GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_USE_DIRECTION,
"use-direction", NULL,
DEFAULT_USE_DIRECTION,
GIMP_PARAM_STATIC_STRINGS);
GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_USE_TILT,
"use-tilt", NULL,
DEFAULT_USE_TILT,
GIMP_PARAM_STATIC_STRINGS);
GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_USE_WHEEL,
"use-wheel", NULL,
DEFAULT_USE_TILT,
GIMP_PARAM_STATIC_STRINGS);
GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_USE_RANDOM,
"use-random", NULL,
DEFAULT_USE_RANDOM,
GIMP_PARAM_STATIC_STRINGS);
GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_USE_FADE,
"use-fade", NULL,
DEFAULT_USE_FADE,
GIMP_PARAM_STATIC_STRINGS);
GIMP_CONFIG_INSTALL_PROP_OBJECT (object_class, PROP_PRESSURE_CURVE,
"pressure-curve", NULL,
GIMP_TYPE_CURVE,
GIMP_CONFIG_PARAM_AGGREGATE);
GIMP_CONFIG_INSTALL_PROP_OBJECT (object_class, PROP_VELOCITY_CURVE,
"velocity-curve", NULL,
GIMP_TYPE_CURVE,
GIMP_CONFIG_PARAM_AGGREGATE);
GIMP_CONFIG_INSTALL_PROP_OBJECT (object_class, PROP_DIRECTION_CURVE,
"direction-curve", NULL,
GIMP_TYPE_CURVE,
GIMP_CONFIG_PARAM_AGGREGATE);
GIMP_CONFIG_INSTALL_PROP_OBJECT (object_class, PROP_TILT_CURVE,
"tilt-curve", NULL,
GIMP_TYPE_CURVE,
GIMP_CONFIG_PARAM_AGGREGATE);
GIMP_CONFIG_INSTALL_PROP_OBJECT (object_class, PROP_WHEEL_CURVE,
"wheel-curve", NULL,
GIMP_TYPE_CURVE,
GIMP_CONFIG_PARAM_AGGREGATE);
GIMP_CONFIG_INSTALL_PROP_OBJECT (object_class, PROP_RANDOM_CURVE,
"random-curve", NULL,
GIMP_TYPE_CURVE,
GIMP_CONFIG_PARAM_AGGREGATE);
GIMP_CONFIG_INSTALL_PROP_OBJECT (object_class, PROP_FADE_CURVE,
"fade-curve", NULL,
GIMP_TYPE_CURVE,
GIMP_CONFIG_PARAM_AGGREGATE);
}
static void
gimp_dynamics_output_init (GimpDynamicsOutput *output)
{
output->pressure_curve = gimp_dynamics_output_create_curve (output,
"pressure-curve");
output->velocity_curve = gimp_dynamics_output_create_curve (output,
"velocity-curve");
output->direction_curve = gimp_dynamics_output_create_curve (output,
"direction-curve");
output->tilt_curve = gimp_dynamics_output_create_curve (output,
"tilt-curve");
output->wheel_curve = gimp_dynamics_output_create_curve (output,
"wheel-curve");
output->random_curve = gimp_dynamics_output_create_curve (output,
"random-curve");
output->fade_curve = gimp_dynamics_output_create_curve (output,
"fade-curve");
}
static void
gimp_dynamics_output_finalize (GObject *object)
{
GimpDynamicsOutput *output = GIMP_DYNAMICS_OUTPUT (object);
g_object_unref (output->pressure_curve);
g_object_unref (output->velocity_curve);
g_object_unref (output->direction_curve);
g_object_unref (output->tilt_curve);
g_object_unref (output->wheel_curve);
g_object_unref (output->random_curve);
g_object_unref (output->fade_curve);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_dynamics_output_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpDynamicsOutput *output = GIMP_DYNAMICS_OUTPUT (object);
switch (property_id)
{
case PROP_TYPE:
output->type = g_value_get_enum (value);
break;
case PROP_USE_PRESSURE:
output->use_pressure = g_value_get_boolean (value);
break;
case PROP_USE_VELOCITY:
output->use_velocity = g_value_get_boolean (value);
break;
case PROP_USE_DIRECTION:
output->use_direction = g_value_get_boolean (value);
break;
case PROP_USE_TILT:
output->use_tilt = g_value_get_boolean (value);
break;
case PROP_USE_WHEEL:
output->use_wheel = g_value_get_boolean (value);
break;
case PROP_USE_RANDOM:
output->use_random = g_value_get_boolean (value);
break;
case PROP_USE_FADE:
output->use_fade = g_value_get_boolean (value);
break;
case PROP_PRESSURE_CURVE:
gimp_dynamics_output_copy_curve (g_value_get_object (value),
output->pressure_curve);
break;
case PROP_VELOCITY_CURVE:
gimp_dynamics_output_copy_curve (g_value_get_object (value),
output->velocity_curve);
break;
case PROP_DIRECTION_CURVE:
gimp_dynamics_output_copy_curve (g_value_get_object (value),
output->direction_curve);
break;
case PROP_TILT_CURVE:
gimp_dynamics_output_copy_curve (g_value_get_object (value),
output->tilt_curve);
break;
case PROP_WHEEL_CURVE:
gimp_dynamics_output_copy_curve (g_value_get_object (value),
output->wheel_curve);
break;
case PROP_RANDOM_CURVE:
gimp_dynamics_output_copy_curve (g_value_get_object (value),
output->random_curve);
break;
case PROP_FADE_CURVE:
gimp_dynamics_output_copy_curve (g_value_get_object (value),
output->fade_curve);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_dynamics_output_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpDynamicsOutput *output = GIMP_DYNAMICS_OUTPUT (object);
switch (property_id)
{
case PROP_TYPE:
g_value_set_enum (value, output->type);
break;
case PROP_USE_PRESSURE:
g_value_set_boolean (value, output->use_pressure);
break;
case PROP_USE_VELOCITY:
g_value_set_boolean (value, output->use_velocity);
break;
case PROP_USE_DIRECTION:
g_value_set_boolean (value, output->use_direction);
break;
case PROP_USE_TILT:
g_value_set_boolean (value, output->use_tilt);
break;
case PROP_USE_WHEEL:
g_value_set_boolean (value, output->use_wheel);
break;
case PROP_USE_RANDOM:
g_value_set_boolean (value, output->use_random);
break;
case PROP_USE_FADE:
g_value_set_boolean (value, output->use_fade);
break;
case PROP_PRESSURE_CURVE:
g_value_set_object (value, output->pressure_curve);
break;
case PROP_VELOCITY_CURVE:
g_value_set_object (value, output->velocity_curve);
break;
case PROP_DIRECTION_CURVE:
g_value_set_object (value, output->direction_curve);
break;
case PROP_TILT_CURVE:
g_value_set_object (value, output->tilt_curve);
break;
case PROP_WHEEL_CURVE:
g_value_set_object (value, output->wheel_curve);
break;
case PROP_RANDOM_CURVE:
g_value_set_object (value, output->random_curve);
break;
case PROP_FADE_CURVE:
g_value_set_object (value, output->fade_curve);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
/* public functions */
GimpDynamicsOutput *
gimp_dynamics_output_new (const gchar *name,
GimpDynamicsOutputType type)
{
g_return_val_if_fail (name != NULL, NULL);
return g_object_new (GIMP_TYPE_DYNAMICS_OUTPUT,
"name", name,
"type", type,
NULL);
}
gboolean
gimp_dynamics_output_is_enabled (GimpDynamicsOutput *output)
{
return (output->use_pressure ||
output->use_velocity ||
output->use_direction ||
output->use_tilt ||
output->use_wheel ||
output->use_random ||
output->use_fade);
}
gdouble
gimp_dynamics_output_get_linear_value (GimpDynamicsOutput *output,
const GimpCoords *coords,
GimpPaintOptions *options,
gdouble fade_point)
{
gdouble total = 0.0;
gdouble result = 1.0;
gint factors = 0;
if (output->use_pressure)
{
total += gimp_curve_map_value (output->pressure_curve, coords->pressure);
factors++;
}
if (output->use_velocity)
{
total += gimp_curve_map_value (output->velocity_curve,
(1.0 - coords->velocity));
factors++;
}
if (output->use_direction)
{
total += gimp_curve_map_value (output->direction_curve,
fmod (coords->direction + 0.5, 1));
factors++;
}
if (output->use_tilt)
{
total += gimp_curve_map_value (output->tilt_curve,
(1.0 - sqrt (SQR (coords->xtilt) +
SQR (coords->ytilt))));
factors++;
}
if (output->use_wheel)
{
gdouble wheel;
if (coords->wheel >= 0.5)
wheel = (coords->wheel - 0.5) * 2;
else
wheel = 1 - coords->wheel * 2;
total += gimp_curve_map_value (output->wheel_curve, wheel);
factors++;
}
if (output->use_random)
{
total += gimp_curve_map_value (output->random_curve,
g_random_double_range (0.0, 1.0));
factors++;
}
if ((output->use_fade) && (options))
{
GimpFadeOptions *fade_options = options->fade_options;
if (fade_options->use_fade)
{
total += gimp_curve_map_value (output->fade_curve, fade_point);
factors++;
}
}
if (factors > 0)
result = total / factors;
#if 0
g_printerr ("Dynamics queried(linear). Result: %f, factors: %d, total: %f\n",
result, factors, total);
#endif
return result;
}
gdouble
gimp_dynamics_output_get_angular_value (GimpDynamicsOutput *output,
const GimpCoords *coords,
GimpPaintOptions *options,
gdouble fade_point)
{
gdouble total = 0.0;
gdouble result = 0.0; /* angles are additive, so we retun zero for no change. */
gint factors = 0;
if (output->use_pressure)
{
total += gimp_curve_map_value (output->pressure_curve, coords->pressure);
factors++;
}
if (output->use_velocity)
{
total += gimp_curve_map_value (output->velocity_curve,
(1.0 - coords->velocity));
factors++;
}
if (output->use_direction)
{
total += gimp_curve_map_value (output->direction_curve, coords->direction);
factors++;
}
/* For tilt to make sense, it needs to be converted to an angle, not
* just a vector
*/
if (output->use_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 += gimp_curve_map_value (output->tilt_curve, tilt);
factors++;
}
if (output->use_wheel)
{
gdouble angle = 1.0 - fmod(0.5 + coords->wheel, 1);
total += gimp_curve_map_value (output->wheel_curve, angle);
factors++;
}
if (output->use_random)
{
total += gimp_curve_map_value (output->random_curve,
g_random_double_range (0.0, 1.0));
factors++;
}
if ((output->use_fade) && (options))
{
GimpFadeOptions *fade_options = options->fade_options;
if (fade_options->use_fade)
{
total += gimp_curve_map_value (output->fade_curve, fade_point);
factors++;
}
}
if (factors > 0)
result = total / factors;
#if 0
g_printerr ("Dynamics queried(angle). Result: %f, factors: %d, total: %f\n",
result, factors, total);
#endif
return result;
}
gdouble
gimp_dynamics_output_get_aspect_value (GimpDynamicsOutput *output,
const GimpCoords *coords,
GimpPaintOptions *options,
gdouble fade_point)
{
gdouble total = 0.0;
gdouble result = 1.0;
gint factors = 0;
if (output->use_pressure)
{
total += 2 * gimp_curve_map_value (output->pressure_curve, coords->pressure);
factors++;
}
if (output->use_velocity)
{
total += 2 * gimp_curve_map_value (output->velocity_curve, coords->velocity);
factors++;
}
if (output->use_direction)
{
gdouble direction = gimp_curve_map_value (output->direction_curve, coords->direction);
direction = fmod (1 + direction, 0.5) / 0.25;
if ((coords->direction > 0.0) && (coords->direction < 0.5))
direction = 1 / direction;
total += direction;
factors++;
}
if (output->use_tilt)
{
total += gimp_curve_map_value (output->tilt_curve,
(sqrt ((1 - fabs (coords->xtilt)) /
(1 - fabs (coords->ytilt)))));
factors++;
}
if (output->use_wheel)
{
total += 2 * gimp_curve_map_value (output->wheel_curve, coords->wheel);
factors++;
}
if (output->use_random)
{
gdouble random = gimp_curve_map_value (output->random_curve,
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->use_fade) && (options))
{
GimpFadeOptions *fade_options = options->fade_options;
if (fade_options->use_fade)
{
total += gimp_curve_map_value (output->fade_curve, fade_point);
factors++;
}
}
if (factors > 0)
result = total / factors;
#if 0
g_printerr ("Dynamics queried(aspect). Result: %f, factors: %d, total: %f\n",
result, factors, total);
#endif
if (result < 0.25) result = 0.25;
return result;
}
static void
gimp_dynamics_output_copy_curve (GimpCurve *src,
GimpCurve *dest)
{
if (src && dest)
{
gimp_config_copy (GIMP_CONFIG (src),
GIMP_CONFIG (dest),
GIMP_CONFIG_PARAM_SERIALIZE);
}
}
static GimpCurve *
gimp_dynamics_output_create_curve (GimpDynamicsOutput *output,
const gchar *name)
{
GimpCurve *curve = GIMP_CURVE (gimp_curve_new (name));
g_signal_connect_object (curve, "dirty",
G_CALLBACK (gimp_dynamics_output_curve_dirty),
output, 0);
return curve;
}
static void
gimp_dynamics_output_curve_dirty (GimpCurve *curve,
GimpDynamicsOutput *output)
{
g_object_notify (G_OBJECT (output), gimp_object_get_name (curve));
}
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