397 lines
12 KiB
C
397 lines
12 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 "libpikamath/pikamath.h"
|
|
|
|
#include "paint-types.h"
|
|
|
|
#include "core/pikaboundary.h"
|
|
#include "core/pikadrawable.h"
|
|
#include "core/pikaerror.h"
|
|
#include "core/pikacoords.h"
|
|
|
|
#include "vectors/pikastroke.h"
|
|
#include "vectors/pikavectors.h"
|
|
|
|
#include "pikapaintcore.h"
|
|
#include "pikapaintcore-stroke.h"
|
|
#include "pikapaintoptions.h"
|
|
|
|
#include "pika-intl.h"
|
|
|
|
|
|
static void pika_paint_core_stroke_emulate_dynamics (PikaCoords *coords,
|
|
gint length);
|
|
|
|
|
|
static const PikaCoords default_coords = PIKA_COORDS_DEFAULT_VALUES;
|
|
|
|
|
|
gboolean
|
|
pika_paint_core_stroke (PikaPaintCore *core,
|
|
PikaDrawable *drawable,
|
|
PikaPaintOptions *paint_options,
|
|
PikaCoords *strokes,
|
|
gint n_strokes,
|
|
gboolean push_undo,
|
|
GError **error)
|
|
{
|
|
GList *drawables;
|
|
gboolean success = FALSE;
|
|
|
|
g_return_val_if_fail (PIKA_IS_PAINT_CORE (core), FALSE);
|
|
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), FALSE);
|
|
g_return_val_if_fail (pika_item_is_attached (PIKA_ITEM (drawable)), FALSE);
|
|
g_return_val_if_fail (PIKA_IS_PAINT_OPTIONS (paint_options), FALSE);
|
|
g_return_val_if_fail (strokes != NULL, FALSE);
|
|
g_return_val_if_fail (n_strokes > 0, FALSE);
|
|
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
|
|
|
|
drawables = g_list_prepend (NULL, drawable);
|
|
|
|
if (pika_paint_core_start (core, drawables, paint_options, &strokes[0],
|
|
error))
|
|
{
|
|
gint i;
|
|
|
|
core->last_coords = strokes[0];
|
|
|
|
pika_paint_core_paint (core, drawables, paint_options,
|
|
PIKA_PAINT_STATE_INIT, 0);
|
|
|
|
pika_paint_core_paint (core, drawables, paint_options,
|
|
PIKA_PAINT_STATE_MOTION, 0);
|
|
|
|
for (i = 1; i < n_strokes; i++)
|
|
{
|
|
pika_paint_core_interpolate (core, drawables, paint_options,
|
|
&strokes[i], 0);
|
|
}
|
|
|
|
pika_paint_core_paint (core, drawables, paint_options,
|
|
PIKA_PAINT_STATE_FINISH, 0);
|
|
|
|
pika_paint_core_finish (core, drawables, push_undo);
|
|
|
|
pika_paint_core_cleanup (core);
|
|
|
|
success = TRUE;
|
|
}
|
|
|
|
g_list_free (drawables);
|
|
|
|
return success;
|
|
}
|
|
|
|
gboolean
|
|
pika_paint_core_stroke_boundary (PikaPaintCore *core,
|
|
PikaDrawable *drawable,
|
|
PikaPaintOptions *paint_options,
|
|
gboolean emulate_dynamics,
|
|
const PikaBoundSeg *bound_segs,
|
|
gint n_bound_segs,
|
|
gint offset_x,
|
|
gint offset_y,
|
|
gboolean push_undo,
|
|
GError **error)
|
|
{
|
|
GList *drawables;
|
|
PikaBoundSeg *stroke_segs;
|
|
gint n_stroke_segs;
|
|
PikaCoords *coords;
|
|
gboolean initialized = FALSE;
|
|
gint n_coords;
|
|
gint seg;
|
|
gint s;
|
|
|
|
g_return_val_if_fail (PIKA_IS_PAINT_CORE (core), FALSE);
|
|
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), FALSE);
|
|
g_return_val_if_fail (pika_item_is_attached (PIKA_ITEM (drawable)), FALSE);
|
|
g_return_val_if_fail (PIKA_IS_PAINT_OPTIONS (paint_options), FALSE);
|
|
g_return_val_if_fail (bound_segs != NULL && n_bound_segs > 0, FALSE);
|
|
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
|
|
|
|
stroke_segs = pika_boundary_sort (bound_segs, n_bound_segs,
|
|
&n_stroke_segs);
|
|
|
|
if (n_stroke_segs == 0)
|
|
return TRUE;
|
|
|
|
coords = g_new0 (PikaCoords, n_bound_segs + 4);
|
|
|
|
seg = 0;
|
|
n_coords = 0;
|
|
|
|
/* we offset all coordinates by 0.5 to align the brush with the path */
|
|
|
|
coords[n_coords] = default_coords;
|
|
coords[n_coords].x = (gdouble) (stroke_segs[0].x1 + offset_x + 0.5);
|
|
coords[n_coords].y = (gdouble) (stroke_segs[0].y1 + offset_y + 0.5);
|
|
|
|
n_coords++;
|
|
|
|
drawables = g_list_prepend (NULL, drawable);
|
|
|
|
for (s = 0; s < n_stroke_segs; s++)
|
|
{
|
|
while (stroke_segs[seg].x1 != -1 ||
|
|
stroke_segs[seg].x2 != -1 ||
|
|
stroke_segs[seg].y1 != -1 ||
|
|
stroke_segs[seg].y2 != -1)
|
|
{
|
|
coords[n_coords] = default_coords;
|
|
coords[n_coords].x = (gdouble) (stroke_segs[seg].x1 + offset_x + 0.5);
|
|
coords[n_coords].y = (gdouble) (stroke_segs[seg].y1 + offset_y + 0.5);
|
|
|
|
n_coords++;
|
|
seg++;
|
|
}
|
|
|
|
/* Close the stroke points up */
|
|
coords[n_coords] = coords[0];
|
|
|
|
n_coords++;
|
|
|
|
if (emulate_dynamics)
|
|
pika_paint_core_stroke_emulate_dynamics (coords, n_coords);
|
|
|
|
if (initialized ||
|
|
pika_paint_core_start (core, drawables, paint_options, &coords[0],
|
|
error))
|
|
{
|
|
gint i;
|
|
|
|
initialized = TRUE;
|
|
|
|
core->cur_coords = coords[0];
|
|
core->last_coords = coords[0];
|
|
|
|
pika_paint_core_paint (core, drawables, paint_options,
|
|
PIKA_PAINT_STATE_INIT, 0);
|
|
|
|
pika_paint_core_paint (core, drawables, paint_options,
|
|
PIKA_PAINT_STATE_MOTION, 0);
|
|
|
|
for (i = 1; i < n_coords; i++)
|
|
{
|
|
pika_paint_core_interpolate (core, drawables, paint_options,
|
|
&coords[i], 0);
|
|
}
|
|
|
|
pika_paint_core_paint (core, drawables, paint_options,
|
|
PIKA_PAINT_STATE_FINISH, 0);
|
|
}
|
|
else
|
|
{
|
|
break;
|
|
}
|
|
|
|
n_coords = 0;
|
|
seg++;
|
|
|
|
coords[n_coords] = default_coords;
|
|
coords[n_coords].x = (gdouble) (stroke_segs[seg].x1 + offset_x + 0.5);
|
|
coords[n_coords].y = (gdouble) (stroke_segs[seg].y1 + offset_y + 0.5);
|
|
|
|
n_coords++;
|
|
}
|
|
|
|
if (initialized)
|
|
{
|
|
pika_paint_core_finish (core, drawables, push_undo);
|
|
|
|
pika_paint_core_cleanup (core);
|
|
}
|
|
|
|
g_list_free (drawables);
|
|
g_free (coords);
|
|
g_free (stroke_segs);
|
|
|
|
return initialized;
|
|
}
|
|
|
|
gboolean
|
|
pika_paint_core_stroke_vectors (PikaPaintCore *core,
|
|
PikaDrawable *drawable,
|
|
PikaPaintOptions *paint_options,
|
|
gboolean emulate_dynamics,
|
|
PikaVectors *vectors,
|
|
gboolean push_undo,
|
|
GError **error)
|
|
{
|
|
GList *drawables;
|
|
GList *stroke;
|
|
gboolean initialized = FALSE;
|
|
gboolean due_to_lack_of_points = FALSE;
|
|
gint off_x, off_y;
|
|
|
|
g_return_val_if_fail (PIKA_IS_PAINT_CORE (core), FALSE);
|
|
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), FALSE);
|
|
g_return_val_if_fail (pika_item_is_attached (PIKA_ITEM (drawable)), FALSE);
|
|
g_return_val_if_fail (PIKA_IS_PAINT_OPTIONS (paint_options), FALSE);
|
|
g_return_val_if_fail (PIKA_IS_VECTORS (vectors), FALSE);
|
|
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
|
|
|
|
pika_item_get_offset (PIKA_ITEM (vectors), &off_x, &off_y);
|
|
|
|
drawables = g_list_prepend (NULL, drawable);
|
|
|
|
for (stroke = vectors->strokes->head;
|
|
stroke;
|
|
stroke = stroke->next)
|
|
{
|
|
GArray *coords;
|
|
gboolean closed;
|
|
|
|
coords = pika_stroke_interpolate (PIKA_STROKE (stroke->data),
|
|
1.0, &closed);
|
|
|
|
if (coords && coords->len)
|
|
{
|
|
gint i;
|
|
|
|
for (i = 0; i < coords->len; i++)
|
|
{
|
|
g_array_index (coords, PikaCoords, i).x += off_x;
|
|
g_array_index (coords, PikaCoords, i).y += off_y;
|
|
}
|
|
|
|
if (emulate_dynamics)
|
|
pika_paint_core_stroke_emulate_dynamics ((PikaCoords *) coords->data,
|
|
coords->len);
|
|
|
|
if (initialized ||
|
|
pika_paint_core_start (core, drawables, paint_options,
|
|
&g_array_index (coords, PikaCoords, 0),
|
|
error))
|
|
{
|
|
initialized = TRUE;
|
|
|
|
core->cur_coords = g_array_index (coords, PikaCoords, 0);
|
|
core->last_coords = g_array_index (coords, PikaCoords, 0);
|
|
|
|
pika_paint_core_paint (core, drawables, paint_options,
|
|
PIKA_PAINT_STATE_INIT, 0);
|
|
|
|
pika_paint_core_paint (core, drawables, paint_options,
|
|
PIKA_PAINT_STATE_MOTION, 0);
|
|
|
|
for (i = 1; i < coords->len; i++)
|
|
{
|
|
pika_paint_core_interpolate (core, drawables, paint_options,
|
|
&g_array_index (coords, PikaCoords, i),
|
|
0);
|
|
}
|
|
|
|
pika_paint_core_paint (core, drawables, paint_options,
|
|
PIKA_PAINT_STATE_FINISH, 0);
|
|
}
|
|
else
|
|
{
|
|
if (coords)
|
|
g_array_free (coords, TRUE);
|
|
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
due_to_lack_of_points = TRUE;
|
|
}
|
|
|
|
if (coords)
|
|
g_array_free (coords, TRUE);
|
|
}
|
|
|
|
if (initialized)
|
|
{
|
|
pika_paint_core_finish (core, drawables, push_undo);
|
|
|
|
pika_paint_core_cleanup (core);
|
|
}
|
|
|
|
if (! initialized && due_to_lack_of_points && *error == NULL)
|
|
{
|
|
g_set_error_literal (error, PIKA_ERROR, PIKA_FAILED,
|
|
_("Not enough points to stroke"));
|
|
}
|
|
|
|
g_list_free (drawables);
|
|
|
|
return initialized;
|
|
}
|
|
|
|
static void
|
|
pika_paint_core_stroke_emulate_dynamics (PikaCoords *coords,
|
|
gint length)
|
|
{
|
|
const gint ramp_length = length / 3;
|
|
|
|
/* Calculate and create pressure ramp parameters */
|
|
if (ramp_length > 0)
|
|
{
|
|
gdouble slope = 1.0 / (gdouble) (ramp_length);
|
|
gint i;
|
|
|
|
/* Calculate pressure start ramp */
|
|
for (i = 0; i < ramp_length; i++)
|
|
{
|
|
coords[i].pressure = i * slope;
|
|
}
|
|
|
|
/* Calculate pressure end ramp */
|
|
for (i = length - ramp_length; i < length; i++)
|
|
{
|
|
coords[i].pressure = 1.0 - (i - (length - ramp_length)) * slope;
|
|
}
|
|
}
|
|
|
|
/* Calculate and create velocity ramp parameters */
|
|
if (length > 0)
|
|
{
|
|
gdouble slope = 1.0 / length;
|
|
gint i;
|
|
|
|
/* Calculate velocity end ramp */
|
|
for (i = 0; i < length; i++)
|
|
{
|
|
coords[i].velocity = i * slope;
|
|
}
|
|
}
|
|
|
|
if (length > 1)
|
|
{
|
|
gint i;
|
|
/* Fill in direction */
|
|
for (i = 1; i < length; i++)
|
|
{
|
|
coords[i].direction = pika_coords_direction (&coords[i-1], &coords[i]);
|
|
}
|
|
|
|
coords[0].direction = coords[1].direction;
|
|
}
|
|
}
|
