276 lines
8.7 KiB
C
276 lines
8.7 KiB
C
/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include <gegl.h>
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#include "paint-types.h"
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#include "core/pika.h"
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#include "core/pikabrush.h"
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#include "core/pikadrawable.h"
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#include "core/pikadynamics.h"
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#include "core/pikagradient.h"
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#include "core/pikaimage.h"
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#include "core/pikasymmetry.h"
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#include "pikaairbrush.h"
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#include "pikaairbrushoptions.h"
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#include "pika-intl.h"
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#define STAMP_MAX_FPS 60
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enum
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{
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STAMP,
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LAST_SIGNAL
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};
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static void pika_airbrush_finalize (GObject *object);
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static void pika_airbrush_paint (PikaPaintCore *paint_core,
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GList *drawables,
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PikaPaintOptions *paint_options,
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PikaSymmetry *sym,
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PikaPaintState paint_state,
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guint32 time);
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static void pika_airbrush_motion (PikaPaintCore *paint_core,
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PikaDrawable *drawable,
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PikaPaintOptions *paint_options,
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PikaSymmetry *sym);
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static gboolean pika_airbrush_timeout (gpointer data);
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G_DEFINE_TYPE (PikaAirbrush, pika_airbrush, PIKA_TYPE_PAINTBRUSH)
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#define parent_class pika_airbrush_parent_class
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static guint airbrush_signals[LAST_SIGNAL] = { 0 };
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void
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pika_airbrush_register (Pika *pika,
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PikaPaintRegisterCallback callback)
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{
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(* callback) (pika,
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PIKA_TYPE_AIRBRUSH,
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PIKA_TYPE_AIRBRUSH_OPTIONS,
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"pika-airbrush",
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_("Airbrush"),
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"pika-tool-airbrush");
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}
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static void
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pika_airbrush_class_init (PikaAirbrushClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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PikaPaintCoreClass *paint_core_class = PIKA_PAINT_CORE_CLASS (klass);
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object_class->finalize = pika_airbrush_finalize;
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paint_core_class->paint = pika_airbrush_paint;
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airbrush_signals[STAMP] =
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g_signal_new ("stamp",
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (PikaAirbrushClass, stamp),
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NULL, NULL, NULL,
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G_TYPE_NONE, 0);
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}
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static void
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pika_airbrush_init (PikaAirbrush *airbrush)
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{
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}
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static void
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pika_airbrush_finalize (GObject *object)
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{
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PikaAirbrush *airbrush = PIKA_AIRBRUSH (object);
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if (airbrush->timeout_id)
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{
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g_source_remove (airbrush->timeout_id);
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airbrush->timeout_id = 0;
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}
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g_clear_object (&airbrush->sym);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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pika_airbrush_paint (PikaPaintCore *paint_core,
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GList *drawables,
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PikaPaintOptions *paint_options,
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PikaSymmetry *sym,
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PikaPaintState paint_state,
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guint32 time)
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{
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PikaAirbrush *airbrush = PIKA_AIRBRUSH (paint_core);
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PikaAirbrushOptions *options = PIKA_AIRBRUSH_OPTIONS (paint_options);
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PikaDynamics *dynamics = PIKA_BRUSH_CORE (paint_core)->dynamics;
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PikaCoords coords;
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g_return_if_fail (g_list_length (drawables) == 1);
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if (airbrush->timeout_id)
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{
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g_source_remove (airbrush->timeout_id);
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airbrush->timeout_id = 0;
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}
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switch (paint_state)
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{
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case PIKA_PAINT_STATE_INIT:
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PIKA_PAINT_CORE_CLASS (parent_class)->paint (paint_core, drawables,
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paint_options,
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sym,
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paint_state, time);
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break;
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case PIKA_PAINT_STATE_MOTION:
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coords = *(pika_symmetry_get_origin (sym));
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pika_airbrush_motion (paint_core, drawables->data, paint_options, sym);
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if ((options->rate != 0.0) && ! options->motion_only)
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{
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PikaImage *image = pika_item_get_image (PIKA_ITEM (drawables->data));
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gdouble fade_point;
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gdouble dynamic_rate;
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gint timeout;
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fade_point = pika_paint_options_get_fade (paint_options, image,
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paint_core->pixel_dist);
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airbrush->drawable = drawables->data;
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airbrush->paint_options = paint_options;
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pika_symmetry_set_origin (sym, drawables->data, &coords);
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if (airbrush->sym)
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g_object_unref (airbrush->sym);
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airbrush->sym = g_object_ref (sym);
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/* Base our timeout on the original stroke. */
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airbrush->coords = coords;
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dynamic_rate = pika_dynamics_get_linear_value (dynamics,
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PIKA_DYNAMICS_OUTPUT_RATE,
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&coords,
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paint_options,
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fade_point);
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timeout = (1000.0 / STAMP_MAX_FPS) /
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((options->rate / 100.0) * dynamic_rate);
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airbrush->timeout_id = g_timeout_add_full (G_PRIORITY_HIGH,
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timeout,
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pika_airbrush_timeout,
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airbrush, NULL);
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}
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break;
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case PIKA_PAINT_STATE_FINISH:
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PIKA_PAINT_CORE_CLASS (parent_class)->paint (paint_core, drawables,
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paint_options,
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sym,
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paint_state, time);
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g_clear_object (&airbrush->sym);
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break;
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}
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}
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static void
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pika_airbrush_motion (PikaPaintCore *paint_core,
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PikaDrawable *drawable,
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PikaPaintOptions *paint_options,
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PikaSymmetry *sym)
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{
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PikaAirbrushOptions *options = PIKA_AIRBRUSH_OPTIONS (paint_options);
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PikaDynamics *dynamics = PIKA_BRUSH_CORE (paint_core)->dynamics;
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PikaImage *image = pika_item_get_image (PIKA_ITEM (drawable));
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gdouble opacity;
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gdouble fade_point;
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PikaCoords *coords;
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fade_point = pika_paint_options_get_fade (paint_options, image,
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paint_core->pixel_dist);
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coords = pika_symmetry_get_origin (sym);
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opacity = (options->flow / 100.0 *
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pika_dynamics_get_linear_value (dynamics,
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PIKA_DYNAMICS_OUTPUT_FLOW,
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coords,
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paint_options,
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fade_point));
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_pika_paintbrush_motion (paint_core, drawable, paint_options,
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sym, opacity);
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}
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static gboolean
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pika_airbrush_timeout (gpointer data)
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{
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PikaAirbrush *airbrush = PIKA_AIRBRUSH (data);
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airbrush->timeout_id = 0;
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g_signal_emit (airbrush, airbrush_signals[STAMP], 0);
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return G_SOURCE_REMOVE;
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}
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/* public functions */
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void
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pika_airbrush_stamp (PikaAirbrush *airbrush)
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{
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GList *drawables;
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g_return_if_fail (PIKA_IS_AIRBRUSH (airbrush));
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pika_symmetry_set_origin (airbrush->sym,
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airbrush->drawable, &airbrush->coords);
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drawables = g_list_prepend (NULL, airbrush->drawable),
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pika_airbrush_paint (PIKA_PAINT_CORE (airbrush),
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drawables,
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airbrush->paint_options,
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airbrush->sym,
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PIKA_PAINT_STATE_MOTION, 0);
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g_list_free (drawables);
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pika_symmetry_clear_origin (airbrush->sym);
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}
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