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-rw-r--r--app/core/gimpdashpattern.c355
1 files changed, 355 insertions, 0 deletions
diff --git a/app/core/gimpdashpattern.c b/app/core/gimpdashpattern.c
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+++ b/app/core/gimpdashpattern.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995-1999 Spencer Kimball and Peter Mattis
+ *
+ * gimpdashpattern.c
+ * Copyright (C) 2003 Simon Budig
+ * Copyright (C) 2005 Sven Neumann
+ *
+ * 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 <gio/gio.h>
+
+#include "libgimpbase/gimpbase.h"
+
+#include "core-types.h"
+
+#include "gimpdashpattern.h"
+
+
+GType
+gimp_dash_pattern_get_type (void)
+{
+ static GType type = 0;
+
+ if (! type)
+ type = g_boxed_type_register_static ("GimpDashPattern",
+ (GBoxedCopyFunc) gimp_dash_pattern_copy,
+ (GBoxedFreeFunc) gimp_dash_pattern_free);
+
+ return type;
+}
+
+GArray *
+gimp_dash_pattern_new_from_preset (GimpDashPreset preset)
+{
+ GArray *pattern;
+ gdouble dash;
+ gint i;
+
+ pattern = g_array_new (FALSE, FALSE, sizeof (gdouble));
+
+ switch (preset)
+ {
+ case GIMP_DASH_CUSTOM:
+ g_warning ("GIMP_DASH_CUSTOM passed to gimp_dash_pattern_from_preset()");
+ break;
+
+ case GIMP_DASH_LINE:
+ break;
+
+ case GIMP_DASH_LONG_DASH:
+ dash = 9.0; g_array_append_val (pattern, dash);
+ dash = 3.0; g_array_append_val (pattern, dash);
+ break;
+
+ case GIMP_DASH_MEDIUM_DASH:
+ dash = 6.0; g_array_append_val (pattern, dash);
+ dash = 6.0; g_array_append_val (pattern, dash);
+ break;
+
+ case GIMP_DASH_SHORT_DASH:
+ dash = 3.0; g_array_append_val (pattern, dash);
+ dash = 9.0; g_array_append_val (pattern, dash);
+ break;
+
+ case GIMP_DASH_SPARSE_DOTS:
+ for (i = 0; i < 2; i++)
+ {
+ dash = 1.0; g_array_append_val (pattern, dash);
+ dash = 5.0; g_array_append_val (pattern, dash);
+ }
+ break;
+
+ case GIMP_DASH_NORMAL_DOTS:
+ for (i = 0; i < 3; i++)
+ {
+ dash = 1.0; g_array_append_val (pattern, dash);
+ dash = 3.0; g_array_append_val (pattern, dash);
+ }
+ break;
+
+ case GIMP_DASH_DENSE_DOTS:
+ for (i = 0; i < 12; i++)
+ {
+ dash = 1.0; g_array_append_val (pattern, dash);
+ }
+ break;
+
+ case GIMP_DASH_STIPPLES:
+ for (i = 0; i < 24; i++)
+ {
+ dash = 0.5; g_array_append_val (pattern, dash);
+ }
+ break;
+
+ case GIMP_DASH_DASH_DOT:
+ dash = 7.0; g_array_append_val (pattern, dash);
+ dash = 2.0; g_array_append_val (pattern, dash);
+ dash = 1.0; g_array_append_val (pattern, dash);
+ dash = 2.0; g_array_append_val (pattern, dash);
+ break;
+
+ case GIMP_DASH_DASH_DOT_DOT:
+ dash = 7.0; g_array_append_val (pattern, dash);
+ for (i=0; i < 5; i++)
+ {
+ dash = 1.0; g_array_append_val (pattern, dash);
+ }
+ break;
+ }
+
+ if (pattern->len < 2)
+ {
+ gimp_dash_pattern_free (pattern);
+ return NULL;
+ }
+
+ return pattern;
+}
+
+GArray *
+gimp_dash_pattern_new_from_segments (const gboolean *segments,
+ gint n_segments,
+ gdouble dash_length)
+{
+ GArray *pattern;
+ gint i;
+ gint count;
+ gboolean state;
+
+ g_return_val_if_fail (segments != NULL || n_segments == 0, NULL);
+
+ pattern = g_array_new (FALSE, FALSE, sizeof (gdouble));
+
+ for (i = 0, count = 0, state = TRUE; i <= n_segments; i++)
+ {
+ if (i < n_segments && segments[i] == state)
+ {
+ count++;
+ }
+ else
+ {
+ gdouble l = (dash_length * count) / n_segments;
+
+ g_array_append_val (pattern, l);
+
+ count = 1;
+ state = ! state;
+ }
+ }
+
+ if (pattern->len < 2)
+ {
+ gimp_dash_pattern_free (pattern);
+ return NULL;
+ }
+
+ return pattern;
+}
+
+void
+gimp_dash_pattern_fill_segments (GArray *pattern,
+ gboolean *segments,
+ gint n_segments)
+{
+ gdouble factor;
+ gdouble sum;
+ gint i, j;
+ gboolean paint;
+
+ g_return_if_fail (segments != NULL || n_segments == 0);
+
+ if (pattern == NULL || pattern->len <= 1)
+ {
+ for (i = 0; i < n_segments; i++)
+ segments[i] = TRUE;
+
+ return;
+ }
+
+ for (i = 0, sum = 0; i < pattern->len ; i++)
+ {
+ sum += g_array_index (pattern, gdouble, i);
+ }
+
+ factor = ((gdouble) n_segments) / sum;
+
+ j = 0;
+ sum = g_array_index (pattern, gdouble, j) * factor;
+ paint = TRUE;
+
+ for (i = 0; i < n_segments ; i++)
+ {
+ while (j < pattern->len && sum <= i)
+ {
+ paint = ! paint;
+ j++;
+ sum += g_array_index (pattern, gdouble, j) * factor;
+ }
+
+ segments[i] = paint;
+ }
+}
+
+GArray *
+gimp_dash_pattern_from_value_array (GimpValueArray *value_array)
+{
+ if (value_array == NULL || gimp_value_array_length (value_array) == 0)
+ {
+ return NULL;
+ }
+ else
+ {
+ GArray *pattern;
+ gint length;
+ gint i;
+
+ length = gimp_value_array_length (value_array);
+
+ pattern = g_array_sized_new (FALSE, FALSE, sizeof (gdouble), length);
+
+ for (i = 0; i < length; i++)
+ {
+ GValue *item = gimp_value_array_index (value_array, i);
+ gdouble val;
+
+ g_return_val_if_fail (G_VALUE_HOLDS_DOUBLE (item), NULL);
+
+ val = g_value_get_double (item);
+
+ g_array_append_val (pattern, val);
+ }
+
+ return pattern;
+ }
+}
+
+GimpValueArray *
+gimp_dash_pattern_to_value_array (GArray *pattern)
+{
+ if (pattern != NULL && pattern->len > 0)
+ {
+ GimpValueArray *value_array = gimp_value_array_new (pattern->len);
+ GValue item = G_VALUE_INIT;
+ gint i;
+
+ g_value_init (&item, G_TYPE_DOUBLE);
+
+ for (i = 0; i < pattern->len; i++)
+ {
+ g_value_set_double (&item, g_array_index (pattern, gdouble, i));
+ gimp_value_array_append (value_array, &item);
+ }
+
+ g_value_unset (&item);
+
+ return value_array;
+ }
+
+ return NULL;
+}
+
+GArray *
+gimp_dash_pattern_from_double_array (gint n_dashes,
+ const gdouble *dashes)
+{
+ if (n_dashes > 0 && dashes != NULL)
+ {
+ GArray *pattern;
+ gint i;
+
+ pattern = g_array_new (FALSE, FALSE, sizeof (gdouble));
+
+ for (i = 0; i < n_dashes; i++)
+ {
+ if (dashes[i] >= 0.0)
+ {
+ g_array_append_val (pattern, dashes[i]);
+ }
+ else
+ {
+ g_array_free (pattern, TRUE);
+ return NULL;
+ }
+ }
+
+ return pattern;
+ }
+
+ return NULL;
+}
+
+gdouble *
+gimp_dash_pattern_to_double_array (GArray *pattern,
+ gint *n_dashes)
+{
+ if (pattern != NULL && pattern->len > 0)
+ {
+ gdouble *dashes;
+ gint i;
+
+ dashes = g_new0 (gdouble, pattern->len);
+
+ for (i = 0; i < pattern->len; i++)
+ {
+ dashes[i] = g_array_index (pattern, gdouble, i);
+ }
+
+ if (n_dashes)
+ *n_dashes = pattern->len;
+
+ return dashes;
+ }
+
+ return NULL;
+}
+
+GArray *
+gimp_dash_pattern_copy (GArray *pattern)
+{
+ if (pattern)
+ {
+ GArray *copy;
+ gint i;
+
+ copy = g_array_sized_new (FALSE, FALSE, sizeof (gdouble), pattern->len);
+
+ for (i = 0; i < pattern->len; i++)
+ g_array_append_val (copy, g_array_index (pattern, gdouble, i));
+
+ return copy;
+ }
+
+ return NULL;
+}
+
+void
+gimp_dash_pattern_free (GArray *pattern)
+{
+ if (pattern)
+ g_array_free (pattern, TRUE);
+}