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gimp/app/paint/gimppaintcore-stroke.c

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/* The GIMP -- an 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <glib-object.h>
#include "paint-types.h"
#include "base/boundary.h"
#include "core/gimpdrawable.h"
#include "vectors/gimpstroke.h"
#include "vectors/gimpvectors.h"
#include "gimppaintcore.h"
#include "gimppaintcore-stroke.h"
#include "gimppaintoptions.h"
gboolean
gimp_paint_core_stroke (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
GimpCoords *strokes,
gint n_strokes)
{
g_return_val_if_fail (GIMP_IS_PAINT_CORE (core), FALSE);
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
g_return_val_if_fail (GIMP_IS_PAINT_OPTIONS (paint_options), FALSE);
g_return_val_if_fail (strokes != NULL, FALSE);
g_return_val_if_fail (n_strokes > 0, FALSE);
if (gimp_paint_core_start (core, drawable, paint_options, &strokes[0]))
{
GimpBrush *current_brush;
gint i;
core->start_coords = strokes[0];
core->last_coords = strokes[0];
gimp_paint_core_paint (core, drawable, paint_options, INIT_PAINT);
current_brush = core->brush;
gimp_paint_core_paint (core, drawable, paint_options, MOTION_PAINT);
core->brush = current_brush;
for (i = 1; i < n_strokes; i++)
{
core->cur_coords = strokes[i];
gimp_paint_core_interpolate (core, drawable, paint_options);
}
gimp_paint_core_paint (core, drawable, paint_options, FINISH_PAINT);
gimp_paint_core_finish (core, drawable);
gimp_paint_core_cleanup (core);
return TRUE;
}
return FALSE;
}
gboolean
gimp_paint_core_stroke_boundary (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
const BoundSeg *bound_segs,
gint n_bound_segs,
gint offset_x,
gint offset_y)
{
GimpImage *gimage;
BoundSeg *sorted_segs;
BoundSeg *stroke_segs;
gint n_stroke_segs;
gint off_x;
gint off_y;
GimpCoords *coords;
gboolean initialized = FALSE;
gint n_coords;
gint seg;
gint s;
g_return_val_if_fail (GIMP_IS_PAINT_CORE (core), FALSE);
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
g_return_val_if_fail (GIMP_IS_PAINT_OPTIONS (paint_options), FALSE);
g_return_val_if_fail (bound_segs != NULL && n_bound_segs > 0, FALSE);
gimage = gimp_item_get_image (GIMP_ITEM (drawable));
sorted_segs = sort_boundary (bound_segs, n_bound_segs, &n_stroke_segs);
stroke_segs = simplify_boundary (sorted_segs, n_stroke_segs, &n_bound_segs);
g_free (sorted_segs);
if (n_stroke_segs == 0)
return TRUE;
gimp_item_offsets (GIMP_ITEM (drawable), &off_x, &off_y);
off_x -= offset_x;
off_y -= offset_y;
coords = g_new0 (GimpCoords, 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].x = (gdouble) (stroke_segs[0].x1 - off_x + 0.5);
coords[n_coords].y = (gdouble) (stroke_segs[0].y1 - off_y + 0.5);
coords[n_coords].pressure = 1.0;
coords[n_coords].xtilt = 0.5;
coords[n_coords].ytilt = 0.5;
coords[n_coords].wheel = 0.5;
n_coords++;
for (s = 0; s < n_stroke_segs; s++)
{
GimpBrush *current_brush;
while (stroke_segs[seg].x1 != -1 ||
stroke_segs[seg].x2 != -1 ||
stroke_segs[seg].y1 != -1 ||
stroke_segs[seg].y2 != -1)
{
coords[n_coords].x = (gdouble) (stroke_segs[seg].x1 -
off_x + 0.5);
coords[n_coords].y = (gdouble) (stroke_segs[seg].y1 -
off_y + 0.5);
coords[n_coords].pressure = 1.0;
coords[n_coords].xtilt = 0.5;
coords[n_coords].ytilt = 0.5;
coords[n_coords].wheel = 0.5;
n_coords++;
seg++;
}
/* Close the stroke points up */
coords[n_coords] = coords[0];
n_coords++;
if (initialized ||
gimp_paint_core_start (core, drawable, paint_options, &coords[0]))
{
gint i;
initialized = TRUE;
core->start_coords = coords[0];
core->last_coords = coords[0];
gimp_paint_core_paint (core, drawable, paint_options, INIT_PAINT);
current_brush = core->brush;
gimp_paint_core_paint (core, drawable, paint_options, MOTION_PAINT);
core->brush = current_brush;
for (i = 1; i < n_coords; i++)
{
core->cur_coords = coords[i];
gimp_paint_core_interpolate (core, drawable, paint_options);
}
gimp_paint_core_paint (core, drawable, paint_options, FINISH_PAINT);
}
n_coords = 0;
seg++;
coords[n_coords].x = (gdouble) (stroke_segs[seg].x1 - off_x + 0.5);
coords[n_coords].y = (gdouble) (stroke_segs[seg].y1 - off_y + 0.5);
coords[n_coords].pressure = 1.0;
coords[n_coords].xtilt = 0.5;
coords[n_coords].ytilt = 0.5;
coords[n_coords].wheel = 0.5;
n_coords++;
}
if (initialized)
{
gimp_paint_core_finish (core, drawable);
gimp_paint_core_cleanup (core);
}
g_free (coords);
g_free (stroke_segs);
return TRUE;
}
gboolean
gimp_paint_core_stroke_vectors (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
GimpVectors *vectors)
{
GList *stroke;
GArray *coords = NULL;
gboolean initialized = FALSE;
gboolean closed;
gint off_x, off_y;
gint vectors_off_x, vectors_off_y;
g_return_val_if_fail (GIMP_IS_PAINT_CORE (core), FALSE);
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
g_return_val_if_fail (GIMP_IS_PAINT_OPTIONS (paint_options), FALSE);
g_return_val_if_fail (GIMP_IS_VECTORS (vectors), FALSE);
gimp_item_offsets (GIMP_ITEM (vectors), &vectors_off_x, &vectors_off_y);
gimp_item_offsets (GIMP_ITEM (drawable), &off_x, &off_y);
off_x -= vectors_off_x;
off_y -= vectors_off_y;
for (stroke = vectors->strokes; stroke; stroke = stroke->next)
{
coords = gimp_stroke_interpolate (GIMP_STROKE (stroke->data),
1.0, &closed);
if (coords && coords->len)
{
GimpBrush *current_brush;
gint i;
for (i = 0; i < coords->len; i++)
{
g_array_index (coords, GimpCoords, i).x -= off_x;
g_array_index (coords, GimpCoords, i).y -= off_y;
}
if (initialized ||
gimp_paint_core_start (core, drawable, paint_options,
&g_array_index (coords, GimpCoords, 0)))
{
initialized = TRUE;
core->start_coords = g_array_index (coords, GimpCoords, 0);
core->last_coords = g_array_index (coords, GimpCoords, 0);
gimp_paint_core_paint (core, drawable, paint_options, INIT_PAINT);
current_brush = core->brush;
gimp_paint_core_paint (core, drawable, paint_options,
MOTION_PAINT);
core->brush = current_brush;
for (i = 1; i < coords->len; i++)
{
core->cur_coords = g_array_index (coords, GimpCoords, i);
gimp_paint_core_interpolate (core, drawable, paint_options);
}
gimp_paint_core_paint (core, drawable, paint_options,
FINISH_PAINT);
}
}
if (coords)
g_array_free (coords, TRUE);
}
if (initialized)
{
gimp_paint_core_finish (core, drawable);
gimp_paint_core_cleanup (core);
}
return TRUE;
}
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