gimp/app/core/gimpdashpattern.c

294 lines
6.7 KiB
C

/* The GIMP -- an 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 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 "core-types.h"
#include "gimpdashpattern.h"
GArray *
gimp_dash_pattern_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)
{
g_array_free (pattern, TRUE);
return NULL;
}
return pattern;
}
GArray *
gimp_dash_pattern_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)
{
g_array_free (pattern, TRUE);
return NULL;
}
return pattern;
}
void
gimp_dash_pattern_segments_set (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 (const GValue *value)
{
GValueArray *val_array;
g_return_val_if_fail (G_VALUE_HOLDS_BOXED (value), NULL);
val_array = g_value_get_boxed (value);
if (val_array == NULL || val_array->n_values == 0)
{
return NULL;
}
else
{
GArray *pattern;
gint i;
pattern = g_array_sized_new (FALSE, FALSE,
sizeof (gdouble), val_array->n_values);
for (i = 0; i < val_array->n_values; i++)
{
GValue *item = g_value_array_get_nth (val_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;
}
}
void
gimp_dash_pattern_value_set (GArray *pattern,
GValue *value)
{
g_return_if_fail (G_VALUE_HOLDS_BOXED (value));
if (pattern == NULL || pattern->len == 0)
{
g_value_set_boxed (value, NULL);
}
else
{
GValueArray *val_array = g_value_array_new (pattern->len);
GValue item = { 0, };
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));
g_value_array_append (val_array, &item);
}
g_value_set_boxed (value, val_array);
}
}
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);
}