98 lines
2.8 KiB
C
98 lines
2.8 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 <string.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include <gegl.h>
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#include "vectors-types.h"
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#include "libpikamath/pikamath.h"
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#include "core/pikaimage.h"
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#include "core/pikatempbuf.h"
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#include "pikastroke.h"
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#include "pikavectors.h"
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#include "pikavectors-preview.h"
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/* public functions */
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PikaTempBuf *
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pika_vectors_get_new_preview (PikaViewable *viewable,
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PikaContext *context,
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gint width,
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gint height)
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{
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PikaVectors *vectors;
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PikaItem *item;
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PikaStroke *cur_stroke;
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gdouble xscale, yscale;
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guchar *data;
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PikaTempBuf *temp_buf;
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vectors = PIKA_VECTORS (viewable);
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item = PIKA_ITEM (viewable);
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xscale = ((gdouble) width) / pika_image_get_width (pika_item_get_image (item));
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yscale = ((gdouble) height) / pika_image_get_height (pika_item_get_image (item));
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temp_buf = pika_temp_buf_new (width, height, babl_format ("Y' u8"));
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data = pika_temp_buf_get_data (temp_buf);
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memset (data, 255, width * height);
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for (cur_stroke = pika_vectors_stroke_get_next (vectors, NULL);
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cur_stroke;
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cur_stroke = pika_vectors_stroke_get_next (vectors, cur_stroke))
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{
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GArray *coords;
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gboolean closed;
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gint i;
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coords = pika_stroke_interpolate (cur_stroke, 0.5, &closed);
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if (coords)
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{
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for (i = 0; i < coords->len; i++)
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{
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PikaCoords point;
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gint x, y;
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point = g_array_index (coords, PikaCoords, i);
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x = ROUND (point.x * xscale);
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y = ROUND (point.y * yscale);
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if (x >= 0 && y >= 0 && x < width && y < height)
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data[y * width + x] = 0;
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}
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g_array_free (coords, TRUE);
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}
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}
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return temp_buf;
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}
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