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/* 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 <string.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "vectors-types.h"
#include "libgimpmath/gimpmath.h"
#include "core/gimpimage.h"
#include "core/gimptempbuf.h"
#include "gimpstroke.h"
#include "gimppath.h"
#include "gimppath-preview.h"
/* public functions */
GimpTempBuf *
gimp_path_get_new_preview (GimpViewable *viewable,
GimpContext *context,
gint width,
gint height)
{
GimpPath *path;
GimpItem *item;
GimpStroke *cur_stroke;
gdouble xscale, yscale;
guchar *data;
GimpTempBuf *temp_buf;
path = GIMP_PATH (viewable);
item = GIMP_ITEM (viewable);
xscale = ((gdouble) width) / gimp_image_get_width (gimp_item_get_image (item));
yscale = ((gdouble) height) / gimp_image_get_height (gimp_item_get_image (item));
temp_buf = gimp_temp_buf_new (width, height, babl_format ("Y' u8"));
data = gimp_temp_buf_get_data (temp_buf);
memset (data, 255, width * height);
for (cur_stroke = gimp_path_stroke_get_next (path, NULL);
cur_stroke;
cur_stroke = gimp_path_stroke_get_next (path, cur_stroke))
{
GArray *coords;
gboolean closed;
gint i;
coords = gimp_stroke_interpolate (cur_stroke, 0.5, &closed);
if (coords)
{
for (i = 0; i < coords->len; i++)
{
GimpCoords point;
gint x, y;
point = g_array_index (coords, GimpCoords, i);
x = ROUND (point.x * xscale);
y = ROUND (point.y * yscale);
if (x >= 0 && y >= 0 && x < width && y < height)
data[y * width + x] = 0;
}
g_array_free (coords, TRUE);
}
}
return temp_buf;
}
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