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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpdrawable-stroke.c
* Copyright (C) 2003 Simon Budig <simon@gimp.org>
*
* 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 <cairo.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "libgimpbase/gimpbase.h"
#include "core-types.h"
#include "gimpchannel.h"
#include "gimpdrawable-fill.h"
#include "gimpdrawable-stroke.h"
#include "gimperror.h"
#include "gimpimage.h"
#include "gimpscanconvert.h"
#include "gimpstrokeoptions.h"
#include "vectors/gimpvectors.h"
#include "gimp-intl.h"
/* public functions */
void
gimp_drawable_stroke_boundary (GimpDrawable *drawable,
GimpStrokeOptions *options,
const GimpBoundSeg *bound_segs,
gint n_bound_segs,
gint offset_x,
gint offset_y,
gboolean push_undo)
{
GimpScanConvert *scan_convert;
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)));
g_return_if_fail (GIMP_IS_STROKE_OPTIONS (options));
g_return_if_fail (bound_segs == NULL || n_bound_segs != 0);
g_return_if_fail (gimp_fill_options_get_style (GIMP_FILL_OPTIONS (options)) !=
GIMP_FILL_STYLE_PATTERN ||
gimp_context_get_pattern (GIMP_CONTEXT (options)) != NULL);
scan_convert = gimp_scan_convert_new_from_boundary (bound_segs, n_bound_segs,
offset_x, offset_y);
if (scan_convert)
{
gimp_drawable_stroke_scan_convert (drawable, options,
scan_convert, push_undo);
gimp_scan_convert_free (scan_convert);
}
}
gboolean
gimp_drawable_stroke_vectors (GimpDrawable *drawable,
GimpStrokeOptions *options,
GimpVectors *vectors,
gboolean push_undo,
GError **error)
{
const GimpBezierDesc *bezier;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
g_return_val_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)), FALSE);
g_return_val_if_fail (GIMP_IS_STROKE_OPTIONS (options), FALSE);
g_return_val_if_fail (GIMP_IS_VECTORS (vectors), FALSE);
g_return_val_if_fail (gimp_fill_options_get_style (GIMP_FILL_OPTIONS (options)) !=
GIMP_FILL_STYLE_PATTERN ||
gimp_context_get_pattern (GIMP_CONTEXT (options)) != NULL,
FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
bezier = gimp_vectors_get_bezier (vectors);
if (bezier && bezier->num_data >= 2)
{
GimpScanConvert *scan_convert = gimp_scan_convert_new ();
gimp_scan_convert_add_bezier (scan_convert, bezier);
gimp_drawable_stroke_scan_convert (drawable, options,
scan_convert, push_undo);
gimp_scan_convert_free (scan_convert);
return TRUE;
}
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("Not enough points to stroke"));
return FALSE;
}
void
gimp_drawable_stroke_scan_convert (GimpDrawable *drawable,
GimpStrokeOptions *options,
GimpScanConvert *scan_convert,
gboolean push_undo)
{
gdouble width;
GimpUnit unit;
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)));
g_return_if_fail (GIMP_IS_STROKE_OPTIONS (options));
g_return_if_fail (scan_convert != NULL);
g_return_if_fail (gimp_fill_options_get_style (GIMP_FILL_OPTIONS (options)) !=
GIMP_FILL_STYLE_PATTERN ||
gimp_context_get_pattern (GIMP_CONTEXT (options)) != NULL);
if (! gimp_item_mask_intersect (GIMP_ITEM (drawable), NULL, NULL, NULL, NULL))
return;
width = gimp_stroke_options_get_width (options);
unit = gimp_stroke_options_get_unit (options);
if (unit != GIMP_UNIT_PIXEL)
{
GimpImage *image = gimp_item_get_image (GIMP_ITEM (drawable));
gdouble xres;
gdouble yres;
gimp_image_get_resolution (image, &xres, &yres);
gimp_scan_convert_set_pixel_ratio (scan_convert, yres / xres);
width = gimp_units_to_pixels (width, unit, yres);
}
gimp_scan_convert_stroke (scan_convert, width,
gimp_stroke_options_get_join_style (options),
gimp_stroke_options_get_cap_style (options),
gimp_stroke_options_get_miter_limit (options),
gimp_stroke_options_get_dash_offset (options),
gimp_stroke_options_get_dash_info (options));
gimp_drawable_fill_scan_convert (drawable, GIMP_FILL_OPTIONS (options),
scan_convert, push_undo);
}
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