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-rw-r--r--app/vectors/gimpvectors-preview.c93
1 files changed, 93 insertions, 0 deletions
diff --git a/app/vectors/gimpvectors-preview.c b/app/vectors/gimpvectors-preview.c
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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 "gimpvectors.h"
+#include "gimpvectors-preview.h"
+
+
+/* public functions */
+
+GimpTempBuf *
+gimp_vectors_get_new_preview (GimpViewable *viewable,
+ GimpContext *context,
+ gint width,
+ gint height)
+{
+ GimpVectors *vectors;
+ GimpItem *item;
+ GimpStroke *cur_stroke;
+ gdouble xscale, yscale;
+ guchar *data;
+ GimpTempBuf *temp_buf;
+
+ vectors = GIMP_VECTORS (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_vectors_stroke_get_next (vectors, NULL);
+ cur_stroke;
+ cur_stroke = gimp_vectors_stroke_get_next (vectors, 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;
+}