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gimp/app/vectors/gimppath.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimppath.c
* Copyright (C) 2002 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 <gegl.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include "libgimpcolor/gimpcolor.h"
#include "libgimpmath/gimpmath.h"
#include "vectors-types.h"
#include "core/gimp.h"
#include "core/gimp-transform-utils.h"
#include "core/gimpbezierdesc.h"
#include "core/gimpchannel-select.h"
#include "core/gimpcontainer.h"
#include "core/gimpcontext.h"
#include "core/gimpdrawable-fill.h"
#include "core/gimpdrawable-stroke.h"
#include "core/gimperror.h"
#include "core/gimpimage.h"
#include "core/gimpimage-undo-push.h"
#include "core/gimppaintinfo.h"
#include "core/gimpstrokeoptions.h"
#include "paint/gimppaintcore-stroke.h"
#include "paint/gimppaintoptions.h"
#include "gimpanchor.h"
#include "gimppath.h"
#include "gimppath-preview.h"
#include "gimpstroke.h"
#include "gimp-intl.h"
enum
{
FREEZE,
THAW,
LAST_SIGNAL
};
static void gimp_path_finalize (GObject *object);
static gint64 gimp_path_get_memsize (GimpObject *object,
gint64 *gui_size);
static gboolean gimp_path_is_attached (GimpItem *item);
static GimpItemTree * gimp_path_get_tree (GimpItem *item);
static gboolean gimp_path_bounds (GimpItem *item,
gdouble *x,
gdouble *y,
gdouble *width,
gdouble *height);
static GimpItem * gimp_path_duplicate (GimpItem *item,
GType new_type);
static void gimp_path_convert (GimpItem *item,
GimpImage *dest_image,
GType old_type);
static void gimp_path_translate (GimpItem *item,
gdouble offset_x,
gdouble offset_y,
gboolean push_undo);
static void gimp_path_scale (GimpItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
GimpInterpolationType interp_type,
GimpProgress *progress);
static void gimp_path_resize (GimpItem *item,
GimpContext *context,
GimpFillType fill_type,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y);
static void gimp_path_flip (GimpItem *item,
GimpContext *context,
GimpOrientationType flip_type,
gdouble axis,
gboolean clip_result);
static void gimp_path_rotate (GimpItem *item,
GimpContext *context,
GimpRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result);
static void gimp_path_transform (GimpItem *item,
GimpContext *context,
const GimpMatrix3 *matrix,
GimpTransformDirection direction,
GimpInterpolationType interp_type,
GimpTransformResize clip_result,
GimpProgress *progress);
static GimpTransformResize
gimp_path_get_clip (GimpItem *item,
GimpTransformResize clip_result);
static gboolean gimp_path_fill (GimpItem *item,
GimpDrawable *drawable,
GimpFillOptions *fill_options,
gboolean push_undo,
GimpProgress *progress,
GError **error);
static gboolean gimp_path_stroke (GimpItem *item,
GimpDrawable *drawable,
GimpStrokeOptions *stroke_options,
gboolean push_undo,
GimpProgress *progress,
GError **error);
static void gimp_path_to_selection (GimpItem *item,
GimpChannelOps op,
gboolean antialias,
gboolean feather,
gdouble feather_radius_x,
gdouble feather_radius_y);
static void gimp_path_real_freeze (GimpPath *path);
static void gimp_path_real_thaw (GimpPath *path);
static void gimp_path_real_stroke_add (GimpPath *path,
GimpStroke *stroke);
static void gimp_path_real_stroke_remove (GimpPath *path,
GimpStroke *stroke);
static GimpStroke * gimp_path_real_stroke_get (GimpPath *path,
const GimpCoords *coord);
static GimpStroke *gimp_path_real_stroke_get_next (GimpPath *path,
GimpStroke *prev);
static gdouble gimp_path_real_stroke_get_length (GimpPath *path,
GimpStroke *prev);
static GimpAnchor * gimp_path_real_anchor_get (GimpPath *path,
const GimpCoords *coord,
GimpStroke **ret_stroke);
static void gimp_path_real_anchor_delete (GimpPath *path,
GimpAnchor *anchor);
static gdouble gimp_path_real_get_length (GimpPath *path,
const GimpAnchor *start);
static gdouble gimp_path_real_get_distance (GimpPath *path,
const GimpCoords *coord);
static gint gimp_path_real_interpolate (GimpPath *path,
GimpStroke *stroke,
gdouble precision,
gint max_points,
GimpCoords *ret_coords);
static GimpBezierDesc * gimp_path_make_bezier (GimpPath *path);
static GimpBezierDesc * gimp_path_real_make_bezier (GimpPath *path);
G_DEFINE_TYPE (GimpPath, gimp_path, GIMP_TYPE_ITEM)
#define parent_class gimp_path_parent_class
static guint gimp_path_signals[LAST_SIGNAL] = { 0 };
static void
gimp_path_class_init (GimpPathClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpObjectClass *gimp_object_class = GIMP_OBJECT_CLASS (klass);
GimpViewableClass *viewable_class = GIMP_VIEWABLE_CLASS (klass);
GimpItemClass *item_class = GIMP_ITEM_CLASS (klass);
gimp_path_signals[FREEZE] =
g_signal_new ("freeze",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GimpPathClass, freeze),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
gimp_path_signals[THAW] =
g_signal_new ("thaw",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpPathClass, thaw),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
object_class->finalize = gimp_path_finalize;
gimp_object_class->get_memsize = gimp_path_get_memsize;
viewable_class->get_new_preview = gimp_path_get_new_preview;
viewable_class->default_icon_name = "gimp-path";
item_class->is_attached = gimp_path_is_attached;
item_class->get_tree = gimp_path_get_tree;
item_class->bounds = gimp_path_bounds;
item_class->duplicate = gimp_path_duplicate;
item_class->convert = gimp_path_convert;
item_class->translate = gimp_path_translate;
item_class->scale = gimp_path_scale;
item_class->resize = gimp_path_resize;
item_class->flip = gimp_path_flip;
item_class->rotate = gimp_path_rotate;
item_class->transform = gimp_path_transform;
item_class->get_clip = gimp_path_get_clip;
item_class->fill = gimp_path_fill;
item_class->stroke = gimp_path_stroke;
item_class->to_selection = gimp_path_to_selection;
item_class->default_name = _("Path");
item_class->rename_desc = C_("undo-type", "Rename Path");
item_class->translate_desc = C_("undo-type", "Move Path");
item_class->scale_desc = C_("undo-type", "Scale Path");
item_class->resize_desc = C_("undo-type", "Resize Path");
item_class->flip_desc = C_("undo-type", "Flip Path");
item_class->rotate_desc = C_("undo-type", "Rotate Path");
item_class->transform_desc = C_("undo-type", "Transform Path");
item_class->fill_desc = C_("undo-type", "Fill Path");
item_class->stroke_desc = C_("undo-type", "Stroke Path");
item_class->to_selection_desc = C_("undo-type", "Path to Selection");
item_class->reorder_desc = C_("undo-type", "Reorder Path");
item_class->raise_desc = C_("undo-type", "Raise Path");
item_class->raise_to_top_desc = C_("undo-type", "Raise Path to Top");
item_class->lower_desc = C_("undo-type", "Lower Path");
item_class->lower_to_bottom_desc = C_("undo-type", "Lower Path to Bottom");
item_class->raise_failed = _("Path cannot be raised higher.");
item_class->lower_failed = _("Path cannot be lowered more.");
klass->freeze = gimp_path_real_freeze;
klass->thaw = gimp_path_real_thaw;
klass->stroke_add = gimp_path_real_stroke_add;
klass->stroke_remove = gimp_path_real_stroke_remove;
klass->stroke_get = gimp_path_real_stroke_get;
klass->stroke_get_next = gimp_path_real_stroke_get_next;
klass->stroke_get_length = gimp_path_real_stroke_get_length;
klass->anchor_get = gimp_path_real_anchor_get;
klass->anchor_delete = gimp_path_real_anchor_delete;
klass->get_length = gimp_path_real_get_length;
klass->get_distance = gimp_path_real_get_distance;
klass->interpolate = gimp_path_real_interpolate;
klass->make_bezier = gimp_path_real_make_bezier;
}
static void
gimp_path_init (GimpPath *path)
{
gimp_item_set_visible (GIMP_ITEM (path), FALSE, FALSE);
path->strokes = g_queue_new ();
path->stroke_to_list = g_hash_table_new (g_direct_hash, g_direct_equal);
path->last_stroke_id = 0;
path->freeze_count = 0;
path->precision = 0.2;
path->bezier_desc = NULL;
path->bounds_valid = FALSE;
}
static void
gimp_path_finalize (GObject *object)
{
GimpPath *path = GIMP_PATH (object);
if (path->bezier_desc)
{
gimp_bezier_desc_free (path->bezier_desc);
path->bezier_desc = NULL;
}
if (path->strokes)
{
g_queue_free_full (path->strokes, (GDestroyNotify) g_object_unref);
path->strokes = NULL;
}
if (path->stroke_to_list)
{
g_hash_table_destroy (path->stroke_to_list);
path->stroke_to_list = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gint64
gimp_path_get_memsize (GimpObject *object,
gint64 *gui_size)
{
GimpPath *path;
GList *list;
gint64 memsize = 0;
path = GIMP_PATH (object);
for (list = path->strokes->head; list; list = g_list_next (list))
memsize += (gimp_object_get_memsize (GIMP_OBJECT (list->data), gui_size) +
sizeof (GList));
return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
static gboolean
gimp_path_is_attached (GimpItem *item)
{
GimpImage *image = gimp_item_get_image (item);
return (GIMP_IS_IMAGE (image) &&
gimp_container_have (gimp_image_get_paths (image),
GIMP_OBJECT (item)));
}
static GimpItemTree *
gimp_path_get_tree (GimpItem *item)
{
if (gimp_item_is_attached (item))
{
GimpImage *image = gimp_item_get_image (item);
return gimp_image_get_path_tree (image);
}
return NULL;
}
static gboolean
gimp_path_bounds (GimpItem *item,
gdouble *x,
gdouble *y,
gdouble *width,
gdouble *height)
{
GimpPath *path = GIMP_PATH (item);
if (! path->bounds_valid)
{
GimpStroke *stroke;
path->bounds_empty = TRUE;
path->bounds_x1 = path->bounds_x2 = 0.0;
path->bounds_y1 = path->bounds_y2 = 0.0;
for (stroke = gimp_path_stroke_get_next (path, NULL);
stroke;
stroke = gimp_path_stroke_get_next (path, stroke))
{
GArray *stroke_coords;
gboolean closed;
stroke_coords = gimp_stroke_interpolate (stroke, 1.0, &closed);
if (stroke_coords)
{
GimpCoords point;
gint i;
if (path->bounds_empty && stroke_coords->len > 0)
{
point = g_array_index (stroke_coords, GimpCoords, 0);
path->bounds_x1 = path->bounds_x2 = point.x;
path->bounds_y1 = path->bounds_y2 = point.y;
path->bounds_empty = FALSE;
}
for (i = 0; i < stroke_coords->len; i++)
{
point = g_array_index (stroke_coords, GimpCoords, i);
path->bounds_x1 = MIN (path->bounds_x1, point.x);
path->bounds_y1 = MIN (path->bounds_y1, point.y);
path->bounds_x2 = MAX (path->bounds_x2, point.x);
path->bounds_y2 = MAX (path->bounds_y2, point.y);
}
g_array_free (stroke_coords, TRUE);
}
}
path->bounds_valid = TRUE;
}
*x = path->bounds_x1;
*y = path->bounds_y1;
*width = path->bounds_x2 - path->bounds_x1;
*height = path->bounds_y2 - path->bounds_y1;
return ! path->bounds_empty;
}
static GimpItem *
gimp_path_duplicate (GimpItem *item,
GType new_type)
{
GimpItem *new_item;
g_return_val_if_fail (g_type_is_a (new_type, GIMP_TYPE_PATH), NULL);
new_item = GIMP_ITEM_CLASS (parent_class)->duplicate (item, new_type);
if (GIMP_IS_PATH (new_item))
{
GimpPath *path = GIMP_PATH (item);
GimpPath *new_path = GIMP_PATH (new_item);
gimp_path_copy_strokes (path, new_path);
}
return new_item;
}
static void
gimp_path_convert (GimpItem *item,
GimpImage *dest_image,
GType old_type)
{
gimp_item_set_size (item,
gimp_image_get_width (dest_image),
gimp_image_get_height (dest_image));
GIMP_ITEM_CLASS (parent_class)->convert (item, dest_image, old_type);
}
static void
gimp_path_translate (GimpItem *item,
gdouble offset_x,
gdouble offset_y,
gboolean push_undo)
{
GimpPath *path = GIMP_PATH (item);
GList *list;
gimp_path_freeze (path);
if (push_undo)
gimp_image_undo_push_path_mod (gimp_item_get_image (item),
_("Move Path"),
path);
for (list = path->strokes->head; list; list = g_list_next (list))
{
GimpStroke *stroke = list->data;
gimp_stroke_translate (stroke, offset_x, offset_y);
}
gimp_path_thaw (path);
}
static void
gimp_path_scale (GimpItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
GimpInterpolationType interpolation_type,
GimpProgress *progress)
{
GimpPath *path = GIMP_PATH (item);
GimpImage *image = gimp_item_get_image (item);
GList *list;
gimp_path_freeze (path);
if (gimp_item_is_attached (item))
gimp_image_undo_push_path_mod (image, NULL, path);
for (list = path->strokes->head; list; list = g_list_next (list))
{
GimpStroke *stroke = list->data;
gimp_stroke_scale (stroke,
(gdouble) new_width / (gdouble) gimp_item_get_width (item),
(gdouble) new_height / (gdouble) gimp_item_get_height (item));
gimp_stroke_translate (stroke, new_offset_x, new_offset_y);
}
GIMP_ITEM_CLASS (parent_class)->scale (item,
gimp_image_get_width (image),
gimp_image_get_height (image),
0, 0,
interpolation_type, progress);
gimp_path_thaw (path);
}
static void
gimp_path_resize (GimpItem *item,
GimpContext *context,
GimpFillType fill_type,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y)
{
GimpPath *path = GIMP_PATH (item);
GimpImage *image = gimp_item_get_image (item);
GList *list;
gimp_path_freeze (path);
if (gimp_item_is_attached (item))
gimp_image_undo_push_path_mod (image, NULL, path);
for (list = path->strokes->head; list; list = g_list_next (list))
{
GimpStroke *stroke = list->data;
gimp_stroke_translate (stroke, offset_x, offset_y);
}
GIMP_ITEM_CLASS (parent_class)->resize (item, context, fill_type,
gimp_image_get_width (image),
gimp_image_get_height (image),
0, 0);
gimp_path_thaw (path);
}
static void
gimp_path_flip (GimpItem *item,
GimpContext *context,
GimpOrientationType flip_type,
gdouble axis,
gboolean clip_result)
{
GimpPath *path = GIMP_PATH (item);
GList *list;
GimpMatrix3 matrix;
gimp_matrix3_identity (&matrix);
gimp_transform_matrix_flip (&matrix, flip_type, axis);
gimp_path_freeze (path);
gimp_image_undo_push_path_mod (gimp_item_get_image (item),
_("Flip Path"),
path);
for (list = path->strokes->head; list; list = g_list_next (list))
{
GimpStroke *stroke = list->data;
gimp_stroke_transform (stroke, &matrix, NULL);
}
gimp_path_thaw (path);
}
static void
gimp_path_rotate (GimpItem *item,
GimpContext *context,
GimpRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result)
{
GimpPath *path = GIMP_PATH (item);
GList *list;
GimpMatrix3 matrix;
gimp_matrix3_identity (&matrix);
gimp_transform_matrix_rotate (&matrix, rotate_type, center_x, center_y);
gimp_path_freeze (path);
gimp_image_undo_push_path_mod (gimp_item_get_image (item),
_("Rotate Path"),
path);
for (list = path->strokes->head; list; list = g_list_next (list))
{
GimpStroke *stroke = list->data;
gimp_stroke_transform (stroke, &matrix, NULL);
}
gimp_path_thaw (path);
}
static void
gimp_path_transform (GimpItem *item,
GimpContext *context,
const GimpMatrix3 *matrix,
GimpTransformDirection direction,
GimpInterpolationType interpolation_type,
GimpTransformResize clip_result,
GimpProgress *progress)
{
GimpPath *path = GIMP_PATH (item);
GimpMatrix3 local_matrix;
GQueue strokes;
GList *list;
gimp_path_freeze (path);
gimp_image_undo_push_path_mod (gimp_item_get_image (item),
_("Transform Path"),
path);
local_matrix = *matrix;
if (direction == GIMP_TRANSFORM_BACKWARD)
gimp_matrix3_invert (&local_matrix);
g_queue_init (&strokes);
while (! g_queue_is_empty (path->strokes))
{
GimpStroke *stroke = g_queue_peek_head (path->strokes);
g_object_ref (stroke);
gimp_path_stroke_remove (path, stroke);
gimp_stroke_transform (stroke, &local_matrix, &strokes);
g_object_unref (stroke);
}
path->last_stroke_id = 0;
for (list = strokes.head; list; list = g_list_next (list))
{
GimpStroke *stroke = list->data;
gimp_path_stroke_add (path, stroke);
g_object_unref (stroke);
}
g_queue_clear (&strokes);
gimp_path_thaw (path);
}
static GimpTransformResize
gimp_path_get_clip (GimpItem *item,
GimpTransformResize clip_result)
{
return GIMP_TRANSFORM_RESIZE_ADJUST;
}
static gboolean
gimp_path_fill (GimpItem *item,
GimpDrawable *drawable,
GimpFillOptions *fill_options,
gboolean push_undo,
GimpProgress *progress,
GError **error)
{
GimpPath *path = GIMP_PATH (item);
if (g_queue_is_empty (path->strokes))
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("Not enough points to fill"));
return FALSE;
}
return gimp_drawable_fill_path (drawable, fill_options,
path, push_undo, error);
}
static gboolean
gimp_path_stroke (GimpItem *item,
GimpDrawable *drawable,
GimpStrokeOptions *stroke_options,
gboolean push_undo,
GimpProgress *progress,
GError **error)
{
GimpPath *path = GIMP_PATH (item);
gboolean retval = FALSE;
if (g_queue_is_empty (path->strokes))
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("Not enough points to stroke"));
return FALSE;
}
switch (gimp_stroke_options_get_method (stroke_options))
{
case GIMP_STROKE_LINE:
retval = gimp_drawable_stroke_path (drawable, stroke_options,
path, push_undo, error);
break;
case GIMP_STROKE_PAINT_METHOD:
{
GimpPaintInfo *paint_info;
GimpPaintCore *core;
GimpPaintOptions *paint_options;
gboolean emulate_dynamics;
paint_info = gimp_context_get_paint_info (GIMP_CONTEXT (stroke_options));
core = g_object_new (paint_info->paint_type, NULL);
paint_options = gimp_stroke_options_get_paint_options (stroke_options);
emulate_dynamics = gimp_stroke_options_get_emulate_dynamics (stroke_options);
retval = gimp_paint_core_stroke_path (core, drawable,
paint_options,
emulate_dynamics,
path, push_undo, error);
g_object_unref (core);
}
break;
default:
g_return_val_if_reached (FALSE);
}
return retval;
}
static void
gimp_path_to_selection (GimpItem *item,
GimpChannelOps op,
gboolean antialias,
gboolean feather,
gdouble feather_radius_x,
gdouble feather_radius_y)
{
GimpPath *path = GIMP_PATH (item);
GimpImage *image = gimp_item_get_image (item);
gimp_channel_select_path (gimp_image_get_mask (image),
GIMP_ITEM_GET_CLASS (item)->to_selection_desc,
path,
op, antialias,
feather, feather_radius_x, feather_radius_x,
TRUE);
}
static void
gimp_path_real_freeze (GimpPath *path)
{
/* release cached bezier representation */
if (path->bezier_desc)
{
gimp_bezier_desc_free (path->bezier_desc);
path->bezier_desc = NULL;
}
/* invalidate bounds */
path->bounds_valid = FALSE;
}
static void
gimp_path_real_thaw (GimpPath *path)
{
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (path));
}
/* public functions */
GimpPath *
gimp_path_new (GimpImage *image,
const gchar *name)
{
GimpPath *path;
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
path = GIMP_PATH (gimp_item_new (GIMP_TYPE_PATH,
image, name,
0, 0,
gimp_image_get_width (image),
gimp_image_get_height (image)));
return path;
}
GimpPath *
gimp_path_get_parent (GimpPath *path)
{
g_return_val_if_fail (GIMP_IS_PATH (path), NULL);
return GIMP_PATH (gimp_viewable_get_parent (GIMP_VIEWABLE (path)));
}
void
gimp_path_freeze (GimpPath *path)
{
g_return_if_fail (GIMP_IS_PATH (path));
path->freeze_count++;
if (path->freeze_count == 1)
g_signal_emit (path, gimp_path_signals[FREEZE], 0);
}
void
gimp_path_thaw (GimpPath *path)
{
g_return_if_fail (GIMP_IS_PATH (path));
g_return_if_fail (path->freeze_count > 0);
path->freeze_count--;
if (path->freeze_count == 0)
g_signal_emit (path, gimp_path_signals[THAW], 0);
}
void
gimp_path_copy_strokes (GimpPath *src_path,
GimpPath *dest_path)
{
g_return_if_fail (GIMP_IS_PATH (src_path));
g_return_if_fail (GIMP_IS_PATH (dest_path));
gimp_path_freeze (dest_path);
g_queue_free_full (dest_path->strokes, (GDestroyNotify) g_object_unref);
dest_path->strokes = g_queue_new ();
g_hash_table_remove_all (dest_path->stroke_to_list);
dest_path->last_stroke_id = 0;
gimp_path_add_strokes (src_path, dest_path);
gimp_path_thaw (dest_path);
}
void
gimp_path_add_strokes (GimpPath *src_path,
GimpPath *dest_path)
{
GList *stroke;
g_return_if_fail (GIMP_IS_PATH (src_path));
g_return_if_fail (GIMP_IS_PATH (dest_path));
gimp_path_freeze (dest_path);
for (stroke = src_path->strokes->head;
stroke != NULL;
stroke = g_list_next (stroke))
{
GimpStroke *newstroke = gimp_stroke_duplicate (stroke->data);
g_queue_push_tail (dest_path->strokes, newstroke);
/* Also add to {stroke: GList node} map */
g_hash_table_insert (dest_path->stroke_to_list,
newstroke,
g_queue_peek_tail_link (dest_path->strokes));
dest_path->last_stroke_id++;
gimp_stroke_set_id (newstroke,
dest_path->last_stroke_id);
}
gimp_path_thaw (dest_path);
}
void
gimp_path_stroke_add (GimpPath *path,
GimpStroke *stroke)
{
g_return_if_fail (GIMP_IS_PATH (path));
g_return_if_fail (GIMP_IS_STROKE (stroke));
gimp_path_freeze (path);
GIMP_PATH_GET_CLASS (path)->stroke_add (path, stroke);
gimp_path_thaw (path);
}
static void
gimp_path_real_stroke_add (GimpPath *path,
GimpStroke *stroke)
{
/*
* Don't prepend into path->strokes. See ChangeLog 2003-05-21
* --Mitch
*/
g_queue_push_tail (path->strokes, g_object_ref (stroke));
/* Also add to {stroke: GList node} map */
g_hash_table_insert (path->stroke_to_list,
stroke,
g_queue_peek_tail_link (path->strokes));
path->last_stroke_id++;
gimp_stroke_set_id (stroke, path->last_stroke_id);
}
void
gimp_path_stroke_remove (GimpPath *path,
GimpStroke *stroke)
{
g_return_if_fail (GIMP_IS_PATH (path));
g_return_if_fail (GIMP_IS_STROKE (stroke));
gimp_path_freeze (path);
GIMP_PATH_GET_CLASS (path)->stroke_remove (path, stroke);
gimp_path_thaw (path);
}
static void
gimp_path_real_stroke_remove (GimpPath *path,
GimpStroke *stroke)
{
GList *list = g_hash_table_lookup (path->stroke_to_list, stroke);
if (list)
{
g_queue_delete_link (path->strokes, list);
g_hash_table_remove (path->stroke_to_list, stroke);
g_object_unref (stroke);
}
}
gint
gimp_path_get_n_strokes (GimpPath *path)
{
g_return_val_if_fail (GIMP_IS_PATH (path), 0);
return g_queue_get_length (path->strokes);
}
GimpStroke *
gimp_path_stroke_get (GimpPath *path,
const GimpCoords *coord)
{
g_return_val_if_fail (GIMP_IS_PATH (path), NULL);
return GIMP_PATH_GET_CLASS (path)->stroke_get (path, coord);
}
static GimpStroke *
gimp_path_real_stroke_get (GimpPath *path,
const GimpCoords *coord)
{
GimpStroke *minstroke = NULL;
gdouble mindist = G_MAXDOUBLE;
GList *list;
for (list = path->strokes->head; list; list = g_list_next (list))
{
GimpStroke *stroke = list->data;
GimpAnchor *anchor = gimp_stroke_anchor_get (stroke, coord);
if (anchor)
{
gdouble dx = coord->x - anchor->position.x;
gdouble dy = coord->y - anchor->position.y;
if (mindist > dx * dx + dy * dy)
{
mindist = dx * dx + dy * dy;
minstroke = stroke;
}
}
}
return minstroke;
}
GimpStroke *
gimp_path_stroke_get_by_id (GimpPath *path,
gint id)
{
GList *list;
g_return_val_if_fail (GIMP_IS_PATH (path), NULL);
for (list = path->strokes->head; list; list = g_list_next (list))
{
if (gimp_stroke_get_id (list->data) == id)
return list->data;
}
return NULL;
}
GimpStroke *
gimp_path_stroke_get_next (GimpPath *path,
GimpStroke *prev)
{
g_return_val_if_fail (GIMP_IS_PATH (path), NULL);
return GIMP_PATH_GET_CLASS (path)->stroke_get_next (path, prev);
}
static GimpStroke *
gimp_path_real_stroke_get_next (GimpPath *path,
GimpStroke *prev)
{
if (! prev)
{
return g_queue_peek_head (path->strokes);
}
else
{
GList *stroke = g_hash_table_lookup (path->stroke_to_list, prev);
g_return_val_if_fail (stroke != NULL, NULL);
return stroke->next ? stroke->next->data : NULL;
}
}
gdouble
gimp_path_stroke_get_length (GimpPath *path,
GimpStroke *stroke)
{
g_return_val_if_fail (GIMP_IS_PATH (path), 0.0);
g_return_val_if_fail (GIMP_IS_STROKE (stroke), 0.0);
return GIMP_PATH_GET_CLASS (path)->stroke_get_length (path, stroke);
}
static gdouble
gimp_path_real_stroke_get_length (GimpPath *path,
GimpStroke *stroke)
{
g_return_val_if_fail (GIMP_IS_PATH (path), 0.0);
g_return_val_if_fail (GIMP_IS_STROKE (stroke), 0.0);
return gimp_stroke_get_length (stroke, path->precision);
}
GimpAnchor *
gimp_path_anchor_get (GimpPath *path,
const GimpCoords *coord,
GimpStroke **ret_stroke)
{
g_return_val_if_fail (GIMP_IS_PATH (path), NULL);
return GIMP_PATH_GET_CLASS (path)->anchor_get (path, coord,
ret_stroke);
}
static GimpAnchor *
gimp_path_real_anchor_get (GimpPath *path,
const GimpCoords *coord,
GimpStroke **ret_stroke)
{
GimpAnchor *minanchor = NULL;
gdouble mindist = -1;
GList *list;
for (list = path->strokes->head; list; list = g_list_next (list))
{
GimpStroke *stroke = list->data;
GimpAnchor *anchor = gimp_stroke_anchor_get (stroke, coord);
if (anchor)
{
gdouble dx = coord->x - anchor->position.x;
gdouble dy = coord->y - anchor->position.y;
if (mindist > dx * dx + dy * dy || mindist < 0)
{
mindist = dx * dx + dy * dy;
minanchor = anchor;
if (ret_stroke)
*ret_stroke = stroke;
}
}
}
return minanchor;
}
void
gimp_path_anchor_delete (GimpPath *path,
GimpAnchor *anchor)
{
g_return_if_fail (GIMP_IS_PATH (path));
g_return_if_fail (anchor != NULL);
GIMP_PATH_GET_CLASS (path)->anchor_delete (path, anchor);
}
static void
gimp_path_real_anchor_delete (GimpPath *path,
GimpAnchor *anchor)
{
}
void
gimp_path_anchor_select (GimpPath *path,
GimpStroke *target_stroke,
GimpAnchor *anchor,
gboolean selected,
gboolean exclusive)
{
GList *list;
for (list = path->strokes->head; list; list = g_list_next (list))
{
GimpStroke *stroke = list->data;
gimp_stroke_anchor_select (stroke,
stroke == target_stroke ? anchor : NULL,
selected, exclusive);
}
}
gdouble
gimp_path_get_length (GimpPath *path,
const GimpAnchor *start)
{
g_return_val_if_fail (GIMP_IS_PATH (path), 0.0);
return GIMP_PATH_GET_CLASS (path)->get_length (path, start);
}
static gdouble
gimp_path_real_get_length (GimpPath *path,
const GimpAnchor *start)
{
g_printerr ("gimp_path_get_length: default implementation\n");
return 0;
}
gdouble
gimp_path_get_distance (GimpPath *path,
const GimpCoords *coord)
{
g_return_val_if_fail (GIMP_IS_PATH (path), 0.0);
return GIMP_PATH_GET_CLASS (path)->get_distance (path, coord);
}
static gdouble
gimp_path_real_get_distance (GimpPath *path,
const GimpCoords *coord)
{
g_printerr ("gimp_path_get_distance: default implementation\n");
return 0;
}
gint
gimp_path_interpolate (GimpPath *path,
GimpStroke *stroke,
gdouble precision,
gint max_points,
GimpCoords *ret_coords)
{
g_return_val_if_fail (GIMP_IS_PATH (path), 0);
return GIMP_PATH_GET_CLASS (path)->interpolate (path, stroke,
precision, max_points,
ret_coords);
}
static gint
gimp_path_real_interpolate (GimpPath *path,
GimpStroke *stroke,
gdouble precision,
gint max_points,
GimpCoords *ret_coords)
{
g_printerr ("gimp_path_interpolate: default implementation\n");
return 0;
}
const GimpBezierDesc *
gimp_path_get_bezier (GimpPath *path)
{
g_return_val_if_fail (GIMP_IS_PATH (path), NULL);
if (! path->bezier_desc)
{
path->bezier_desc = gimp_path_make_bezier (path);
}
return path->bezier_desc;
}
static GimpBezierDesc *
gimp_path_make_bezier (GimpPath *path)
{
return GIMP_PATH_GET_CLASS (path)->make_bezier (path);
}
static GimpBezierDesc *
gimp_path_real_make_bezier (GimpPath *path)
{
GimpStroke *stroke;
GArray *cmd_array;
GimpBezierDesc *ret_bezdesc = NULL;
cmd_array = g_array_new (FALSE, FALSE, sizeof (cairo_path_data_t));
for (stroke = gimp_path_stroke_get_next (path, NULL);
stroke;
stroke = gimp_path_stroke_get_next (path, stroke))
{
GimpBezierDesc *bezdesc = gimp_stroke_make_bezier (stroke);
if (bezdesc)
{
cmd_array = g_array_append_vals (cmd_array, bezdesc->data,
bezdesc->num_data);
gimp_bezier_desc_free (bezdesc);
}
}
if (cmd_array->len > 0)
ret_bezdesc = gimp_bezier_desc_new ((cairo_path_data_t *) cmd_array->data,
cmd_array->len);
g_array_free (cmd_array, FALSE);
return ret_bezdesc;
}
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