PIKApp/app/paint/pikaairbrush.c

276 lines
8.7 KiB
C

/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 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 <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "paint-types.h"
#include "core/pika.h"
#include "core/pikabrush.h"
#include "core/pikadrawable.h"
#include "core/pikadynamics.h"
#include "core/pikagradient.h"
#include "core/pikaimage.h"
#include "core/pikasymmetry.h"
#include "pikaairbrush.h"
#include "pikaairbrushoptions.h"
#include "pika-intl.h"
#define STAMP_MAX_FPS 60
enum
{
STAMP,
LAST_SIGNAL
};
static void pika_airbrush_finalize (GObject *object);
static void pika_airbrush_paint (PikaPaintCore *paint_core,
GList *drawables,
PikaPaintOptions *paint_options,
PikaSymmetry *sym,
PikaPaintState paint_state,
guint32 time);
static void pika_airbrush_motion (PikaPaintCore *paint_core,
PikaDrawable *drawable,
PikaPaintOptions *paint_options,
PikaSymmetry *sym);
static gboolean pika_airbrush_timeout (gpointer data);
G_DEFINE_TYPE (PikaAirbrush, pika_airbrush, PIKA_TYPE_PAINTBRUSH)
#define parent_class pika_airbrush_parent_class
static guint airbrush_signals[LAST_SIGNAL] = { 0 };
void
pika_airbrush_register (Pika *pika,
PikaPaintRegisterCallback callback)
{
(* callback) (pika,
PIKA_TYPE_AIRBRUSH,
PIKA_TYPE_AIRBRUSH_OPTIONS,
"pika-airbrush",
_("Airbrush"),
"pika-tool-airbrush");
}
static void
pika_airbrush_class_init (PikaAirbrushClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
PikaPaintCoreClass *paint_core_class = PIKA_PAINT_CORE_CLASS (klass);
object_class->finalize = pika_airbrush_finalize;
paint_core_class->paint = pika_airbrush_paint;
airbrush_signals[STAMP] =
g_signal_new ("stamp",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaAirbrushClass, stamp),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
}
static void
pika_airbrush_init (PikaAirbrush *airbrush)
{
}
static void
pika_airbrush_finalize (GObject *object)
{
PikaAirbrush *airbrush = PIKA_AIRBRUSH (object);
if (airbrush->timeout_id)
{
g_source_remove (airbrush->timeout_id);
airbrush->timeout_id = 0;
}
g_clear_object (&airbrush->sym);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
pika_airbrush_paint (PikaPaintCore *paint_core,
GList *drawables,
PikaPaintOptions *paint_options,
PikaSymmetry *sym,
PikaPaintState paint_state,
guint32 time)
{
PikaAirbrush *airbrush = PIKA_AIRBRUSH (paint_core);
PikaAirbrushOptions *options = PIKA_AIRBRUSH_OPTIONS (paint_options);
PikaDynamics *dynamics = PIKA_BRUSH_CORE (paint_core)->dynamics;
PikaCoords coords;
g_return_if_fail (g_list_length (drawables) == 1);
if (airbrush->timeout_id)
{
g_source_remove (airbrush->timeout_id);
airbrush->timeout_id = 0;
}
switch (paint_state)
{
case PIKA_PAINT_STATE_INIT:
PIKA_PAINT_CORE_CLASS (parent_class)->paint (paint_core, drawables,
paint_options,
sym,
paint_state, time);
break;
case PIKA_PAINT_STATE_MOTION:
coords = *(pika_symmetry_get_origin (sym));
pika_airbrush_motion (paint_core, drawables->data, paint_options, sym);
if ((options->rate != 0.0) && ! options->motion_only)
{
PikaImage *image = pika_item_get_image (PIKA_ITEM (drawables->data));
gdouble fade_point;
gdouble dynamic_rate;
gint timeout;
fade_point = pika_paint_options_get_fade (paint_options, image,
paint_core->pixel_dist);
airbrush->drawable = drawables->data;
airbrush->paint_options = paint_options;
pika_symmetry_set_origin (sym, drawables->data, &coords);
if (airbrush->sym)
g_object_unref (airbrush->sym);
airbrush->sym = g_object_ref (sym);
/* Base our timeout on the original stroke. */
airbrush->coords = coords;
dynamic_rate = pika_dynamics_get_linear_value (dynamics,
PIKA_DYNAMICS_OUTPUT_RATE,
&coords,
paint_options,
fade_point);
timeout = (1000.0 / STAMP_MAX_FPS) /
((options->rate / 100.0) * dynamic_rate);
airbrush->timeout_id = g_timeout_add_full (G_PRIORITY_HIGH,
timeout,
pika_airbrush_timeout,
airbrush, NULL);
}
break;
case PIKA_PAINT_STATE_FINISH:
PIKA_PAINT_CORE_CLASS (parent_class)->paint (paint_core, drawables,
paint_options,
sym,
paint_state, time);
g_clear_object (&airbrush->sym);
break;
}
}
static void
pika_airbrush_motion (PikaPaintCore *paint_core,
PikaDrawable *drawable,
PikaPaintOptions *paint_options,
PikaSymmetry *sym)
{
PikaAirbrushOptions *options = PIKA_AIRBRUSH_OPTIONS (paint_options);
PikaDynamics *dynamics = PIKA_BRUSH_CORE (paint_core)->dynamics;
PikaImage *image = pika_item_get_image (PIKA_ITEM (drawable));
gdouble opacity;
gdouble fade_point;
PikaCoords *coords;
fade_point = pika_paint_options_get_fade (paint_options, image,
paint_core->pixel_dist);
coords = pika_symmetry_get_origin (sym);
opacity = (options->flow / 100.0 *
pika_dynamics_get_linear_value (dynamics,
PIKA_DYNAMICS_OUTPUT_FLOW,
coords,
paint_options,
fade_point));
_pika_paintbrush_motion (paint_core, drawable, paint_options,
sym, opacity);
}
static gboolean
pika_airbrush_timeout (gpointer data)
{
PikaAirbrush *airbrush = PIKA_AIRBRUSH (data);
airbrush->timeout_id = 0;
g_signal_emit (airbrush, airbrush_signals[STAMP], 0);
return G_SOURCE_REMOVE;
}
/* public functions */
void
pika_airbrush_stamp (PikaAirbrush *airbrush)
{
GList *drawables;
g_return_if_fail (PIKA_IS_AIRBRUSH (airbrush));
pika_symmetry_set_origin (airbrush->sym,
airbrush->drawable, &airbrush->coords);
drawables = g_list_prepend (NULL, airbrush->drawable),
pika_airbrush_paint (PIKA_PAINT_CORE (airbrush),
drawables,
airbrush->paint_options,
airbrush->sym,
PIKA_PAINT_STATE_MOTION, 0);
g_list_free (drawables);
pika_symmetry_clear_origin (airbrush->sym);
}