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-rw-r--r--app/paint/gimpairbrush.c266
1 files changed, 266 insertions, 0 deletions
diff --git a/app/paint/gimpairbrush.c b/app/paint/gimpairbrush.c
new file mode 100644
index 0000000..b4bf5b4
--- /dev/null
+++ b/app/paint/gimpairbrush.c
@@ -0,0 +1,266 @@
+/* GIMP - The GNU Image Manipulation Program
+ * 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/gimp.h"
+#include "core/gimpbrush.h"
+#include "core/gimpdrawable.h"
+#include "core/gimpdynamics.h"
+#include "core/gimpgradient.h"
+#include "core/gimpimage.h"
+#include "core/gimpsymmetry.h"
+
+#include "gimpairbrush.h"
+#include "gimpairbrushoptions.h"
+
+#include "gimp-intl.h"
+
+
+#define STAMP_MAX_FPS 60
+
+
+enum
+{
+ STAMP,
+ LAST_SIGNAL
+};
+
+
+static void gimp_airbrush_finalize (GObject *object);
+
+static void gimp_airbrush_paint (GimpPaintCore *paint_core,
+ GimpDrawable *drawable,
+ GimpPaintOptions *paint_options,
+ GimpSymmetry *sym,
+ GimpPaintState paint_state,
+ guint32 time);
+static void gimp_airbrush_motion (GimpPaintCore *paint_core,
+ GimpDrawable *drawable,
+ GimpPaintOptions *paint_options,
+ GimpSymmetry *sym);
+
+static gboolean gimp_airbrush_timeout (gpointer data);
+
+
+G_DEFINE_TYPE (GimpAirbrush, gimp_airbrush, GIMP_TYPE_PAINTBRUSH)
+
+#define parent_class gimp_airbrush_parent_class
+
+static guint airbrush_signals[LAST_SIGNAL] = { 0 };
+
+
+void
+gimp_airbrush_register (Gimp *gimp,
+ GimpPaintRegisterCallback callback)
+{
+ (* callback) (gimp,
+ GIMP_TYPE_AIRBRUSH,
+ GIMP_TYPE_AIRBRUSH_OPTIONS,
+ "gimp-airbrush",
+ _("Airbrush"),
+ "gimp-tool-airbrush");
+}
+
+static void
+gimp_airbrush_class_init (GimpAirbrushClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GimpPaintCoreClass *paint_core_class = GIMP_PAINT_CORE_CLASS (klass);
+
+ object_class->finalize = gimp_airbrush_finalize;
+
+ paint_core_class->paint = gimp_airbrush_paint;
+
+ airbrush_signals[STAMP] =
+ g_signal_new ("stamp",
+ G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_FIRST,
+ G_STRUCT_OFFSET (GimpAirbrushClass, stamp),
+ NULL, NULL,
+ g_cclosure_marshal_VOID__VOID,
+ G_TYPE_NONE, 0);
+}
+
+static void
+gimp_airbrush_init (GimpAirbrush *airbrush)
+{
+}
+
+static void
+gimp_airbrush_finalize (GObject *object)
+{
+ GimpAirbrush *airbrush = GIMP_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
+gimp_airbrush_paint (GimpPaintCore *paint_core,
+ GimpDrawable *drawable,
+ GimpPaintOptions *paint_options,
+ GimpSymmetry *sym,
+ GimpPaintState paint_state,
+ guint32 time)
+{
+ GimpAirbrush *airbrush = GIMP_AIRBRUSH (paint_core);
+ GimpAirbrushOptions *options = GIMP_AIRBRUSH_OPTIONS (paint_options);
+ GimpDynamics *dynamics = GIMP_BRUSH_CORE (paint_core)->dynamics;
+
+ if (airbrush->timeout_id)
+ {
+ g_source_remove (airbrush->timeout_id);
+ airbrush->timeout_id = 0;
+ }
+
+ switch (paint_state)
+ {
+ case GIMP_PAINT_STATE_INIT:
+ GIMP_PAINT_CORE_CLASS (parent_class)->paint (paint_core, drawable,
+ paint_options,
+ sym,
+ paint_state, time);
+ break;
+
+ case GIMP_PAINT_STATE_MOTION:
+ gimp_airbrush_motion (paint_core, drawable, paint_options, sym);
+
+ if ((options->rate != 0.0) && ! options->motion_only)
+ {
+ GimpImage *image = gimp_item_get_image (GIMP_ITEM (drawable));
+ gdouble fade_point;
+ gdouble dynamic_rate;
+ gint timeout;
+ GimpCoords *coords;
+
+ fade_point = gimp_paint_options_get_fade (paint_options, image,
+ paint_core->pixel_dist);
+
+ airbrush->drawable = drawable;
+ airbrush->paint_options = paint_options;
+
+ if (airbrush->sym)
+ g_object_unref (airbrush->sym);
+ airbrush->sym = g_object_ref (sym);
+
+ /* Base our timeout on the original stroke. */
+ coords = gimp_symmetry_get_origin (sym);
+
+ airbrush->coords = *coords;
+
+ dynamic_rate = gimp_dynamics_get_linear_value (dynamics,
+ GIMP_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,
+ gimp_airbrush_timeout,
+ airbrush, NULL);
+ }
+ break;
+
+ case GIMP_PAINT_STATE_FINISH:
+ GIMP_PAINT_CORE_CLASS (parent_class)->paint (paint_core, drawable,
+ paint_options,
+ sym,
+ paint_state, time);
+
+ g_clear_object (&airbrush->sym);
+ break;
+ }
+}
+
+static void
+gimp_airbrush_motion (GimpPaintCore *paint_core,
+ GimpDrawable *drawable,
+ GimpPaintOptions *paint_options,
+ GimpSymmetry *sym)
+
+{
+ GimpAirbrushOptions *options = GIMP_AIRBRUSH_OPTIONS (paint_options);
+ GimpDynamics *dynamics = GIMP_BRUSH_CORE (paint_core)->dynamics;
+ GimpImage *image = gimp_item_get_image (GIMP_ITEM (drawable));
+ gdouble opacity;
+ gdouble fade_point;
+ GimpCoords *coords;
+
+ fade_point = gimp_paint_options_get_fade (paint_options, image,
+ paint_core->pixel_dist);
+
+ coords = gimp_symmetry_get_origin (sym);
+
+ opacity = (options->flow / 100.0 *
+ gimp_dynamics_get_linear_value (dynamics,
+ GIMP_DYNAMICS_OUTPUT_FLOW,
+ coords,
+ paint_options,
+ fade_point));
+
+ _gimp_paintbrush_motion (paint_core, drawable, paint_options,
+ sym, opacity);
+}
+
+static gboolean
+gimp_airbrush_timeout (gpointer data)
+{
+ GimpAirbrush *airbrush = GIMP_AIRBRUSH (data);
+
+ airbrush->timeout_id = 0;
+
+ g_signal_emit (airbrush, airbrush_signals[STAMP], 0);
+
+ return G_SOURCE_REMOVE;
+}
+
+
+/* public functions */
+
+
+void
+gimp_airbrush_stamp (GimpAirbrush *airbrush)
+{
+ g_return_if_fail (GIMP_IS_AIRBRUSH (airbrush));
+
+ gimp_symmetry_set_origin (airbrush->sym,
+ airbrush->drawable, &airbrush->coords);
+
+ gimp_airbrush_paint (GIMP_PAINT_CORE (airbrush),
+ airbrush->drawable,
+ airbrush->paint_options,
+ airbrush->sym,
+ GIMP_PAINT_STATE_MOTION, 0);
+
+ gimp_symmetry_clear_origin (airbrush->sym);
+}
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