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PIKApp/app/vectors/pikavectors.c

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/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* pikavectors.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 "libpikacolor/pikacolor.h"
#include "libpikamath/pikamath.h"
#include "vectors-types.h"
#include "core/pika.h"
#include "core/pika-transform-utils.h"
#include "core/pikabezierdesc.h"
#include "core/pikachannel-select.h"
#include "core/pikacontainer.h"
#include "core/pikacontext.h"
#include "core/pikadrawable-fill.h"
#include "core/pikadrawable-stroke.h"
#include "core/pikaerror.h"
#include "core/pikaimage.h"
#include "core/pikaimage-undo-push.h"
#include "core/pikapaintinfo.h"
#include "core/pikastrokeoptions.h"
#include "paint/pikapaintcore-stroke.h"
#include "paint/pikapaintoptions.h"
#include "pikaanchor.h"
#include "pikastroke.h"
#include "pikavectors.h"
#include "pikavectors-preview.h"
#include "pika-intl.h"
enum
{
FREEZE,
THAW,
LAST_SIGNAL
};
static void pika_vectors_finalize (GObject *object);
static gint64 pika_vectors_get_memsize (PikaObject *object,
gint64 *gui_size);
static gboolean pika_vectors_is_attached (PikaItem *item);
static PikaItemTree * pika_vectors_get_tree (PikaItem *item);
static gboolean pika_vectors_bounds (PikaItem *item,
gdouble *x,
gdouble *y,
gdouble *width,
gdouble *height);
static PikaItem * pika_vectors_duplicate (PikaItem *item,
GType new_type);
static void pika_vectors_convert (PikaItem *item,
PikaImage *dest_image,
GType old_type);
static void pika_vectors_translate (PikaItem *item,
gdouble offset_x,
gdouble offset_y,
gboolean push_undo);
static void pika_vectors_scale (PikaItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
PikaInterpolationType interp_type,
PikaProgress *progress);
static void pika_vectors_resize (PikaItem *item,
PikaContext *context,
PikaFillType fill_type,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y);
static void pika_vectors_flip (PikaItem *item,
PikaContext *context,
PikaOrientationType flip_type,
gdouble axis,
gboolean clip_result);
static void pika_vectors_rotate (PikaItem *item,
PikaContext *context,
PikaRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result);
static void pika_vectors_transform (PikaItem *item,
PikaContext *context,
const PikaMatrix3 *matrix,
PikaTransformDirection direction,
PikaInterpolationType interp_type,
PikaTransformResize clip_result,
PikaProgress *progress);
static PikaTransformResize
pika_vectors_get_clip (PikaItem *item,
PikaTransformResize clip_result);
static gboolean pika_vectors_fill (PikaItem *item,
PikaDrawable *drawable,
PikaFillOptions *fill_options,
gboolean push_undo,
PikaProgress *progress,
GError **error);
static gboolean pika_vectors_stroke (PikaItem *item,
PikaDrawable *drawable,
PikaStrokeOptions *stroke_options,
gboolean push_undo,
PikaProgress *progress,
GError **error);
static void pika_vectors_to_selection (PikaItem *item,
PikaChannelOps op,
gboolean antialias,
gboolean feather,
gdouble feather_radius_x,
gdouble feather_radius_y);
static void pika_vectors_real_freeze (PikaVectors *vectors);
static void pika_vectors_real_thaw (PikaVectors *vectors);
static void pika_vectors_real_stroke_add (PikaVectors *vectors,
PikaStroke *stroke);
static void pika_vectors_real_stroke_remove (PikaVectors *vectors,
PikaStroke *stroke);
static PikaStroke * pika_vectors_real_stroke_get (PikaVectors *vectors,
const PikaCoords *coord);
static PikaStroke *pika_vectors_real_stroke_get_next(PikaVectors *vectors,
PikaStroke *prev);
static gdouble pika_vectors_real_stroke_get_length (PikaVectors *vectors,
PikaStroke *prev);
static PikaAnchor * pika_vectors_real_anchor_get (PikaVectors *vectors,
const PikaCoords *coord,
PikaStroke **ret_stroke);
static void pika_vectors_real_anchor_delete (PikaVectors *vectors,
PikaAnchor *anchor);
static gdouble pika_vectors_real_get_length (PikaVectors *vectors,
const PikaAnchor *start);
static gdouble pika_vectors_real_get_distance (PikaVectors *vectors,
const PikaCoords *coord);
static gint pika_vectors_real_interpolate (PikaVectors *vectors,
PikaStroke *stroke,
gdouble precision,
gint max_points,
PikaCoords *ret_coords);
static PikaBezierDesc * pika_vectors_make_bezier (PikaVectors *vectors);
static PikaBezierDesc * pika_vectors_real_make_bezier (PikaVectors *vectors);
G_DEFINE_TYPE (PikaVectors, pika_vectors, PIKA_TYPE_ITEM)
#define parent_class pika_vectors_parent_class
static guint pika_vectors_signals[LAST_SIGNAL] = { 0 };
static void
pika_vectors_class_init (PikaVectorsClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
PikaObjectClass *pika_object_class = PIKA_OBJECT_CLASS (klass);
PikaViewableClass *viewable_class = PIKA_VIEWABLE_CLASS (klass);
PikaItemClass *item_class = PIKA_ITEM_CLASS (klass);
pika_vectors_signals[FREEZE] =
g_signal_new ("freeze",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (PikaVectorsClass, freeze),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
pika_vectors_signals[THAW] =
g_signal_new ("thaw",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaVectorsClass, thaw),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
object_class->finalize = pika_vectors_finalize;
pika_object_class->get_memsize = pika_vectors_get_memsize;
viewable_class->get_new_preview = pika_vectors_get_new_preview;
viewable_class->default_icon_name = "pika-path";
item_class->is_attached = pika_vectors_is_attached;
item_class->get_tree = pika_vectors_get_tree;
item_class->bounds = pika_vectors_bounds;
item_class->duplicate = pika_vectors_duplicate;
item_class->convert = pika_vectors_convert;
item_class->translate = pika_vectors_translate;
item_class->scale = pika_vectors_scale;
item_class->resize = pika_vectors_resize;
item_class->flip = pika_vectors_flip;
item_class->rotate = pika_vectors_rotate;
item_class->transform = pika_vectors_transform;
item_class->get_clip = pika_vectors_get_clip;
item_class->fill = pika_vectors_fill;
item_class->stroke = pika_vectors_stroke;
item_class->to_selection = pika_vectors_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 = pika_vectors_real_freeze;
klass->thaw = pika_vectors_real_thaw;
klass->stroke_add = pika_vectors_real_stroke_add;
klass->stroke_remove = pika_vectors_real_stroke_remove;
klass->stroke_get = pika_vectors_real_stroke_get;
klass->stroke_get_next = pika_vectors_real_stroke_get_next;
klass->stroke_get_length = pika_vectors_real_stroke_get_length;
klass->anchor_get = pika_vectors_real_anchor_get;
klass->anchor_delete = pika_vectors_real_anchor_delete;
klass->get_length = pika_vectors_real_get_length;
klass->get_distance = pika_vectors_real_get_distance;
klass->interpolate = pika_vectors_real_interpolate;
klass->make_bezier = pika_vectors_real_make_bezier;
}
static void
pika_vectors_init (PikaVectors *vectors)
{
pika_item_set_visible (PIKA_ITEM (vectors), FALSE, FALSE);
vectors->strokes = g_queue_new ();
vectors->stroke_to_list = g_hash_table_new (g_direct_hash, g_direct_equal);
vectors->last_stroke_id = 0;
vectors->freeze_count = 0;
vectors->precision = 0.2;
vectors->bezier_desc = NULL;
vectors->bounds_valid = FALSE;
}
static void
pika_vectors_finalize (GObject *object)
{
PikaVectors *vectors = PIKA_VECTORS (object);
if (vectors->bezier_desc)
{
pika_bezier_desc_free (vectors->bezier_desc);
vectors->bezier_desc = NULL;
}
if (vectors->strokes)
{
g_queue_free_full (vectors->strokes, (GDestroyNotify) g_object_unref);
vectors->strokes = NULL;
}
if (vectors->stroke_to_list)
{
g_hash_table_destroy (vectors->stroke_to_list);
vectors->stroke_to_list = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gint64
pika_vectors_get_memsize (PikaObject *object,
gint64 *gui_size)
{
PikaVectors *vectors;
GList *list;
gint64 memsize = 0;
vectors = PIKA_VECTORS (object);
for (list = vectors->strokes->head; list; list = g_list_next (list))
memsize += (pika_object_get_memsize (PIKA_OBJECT (list->data), gui_size) +
sizeof (GList));
return memsize + PIKA_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
static gboolean
pika_vectors_is_attached (PikaItem *item)
{
PikaImage *image = pika_item_get_image (item);
return (PIKA_IS_IMAGE (image) &&
pika_container_have (pika_image_get_vectors (image),
PIKA_OBJECT (item)));
}
static PikaItemTree *
pika_vectors_get_tree (PikaItem *item)
{
if (pika_item_is_attached (item))
{
PikaImage *image = pika_item_get_image (item);
return pika_image_get_vectors_tree (image);
}
return NULL;
}
static gboolean
pika_vectors_bounds (PikaItem *item,
gdouble *x,
gdouble *y,
gdouble *width,
gdouble *height)
{
PikaVectors *vectors = PIKA_VECTORS (item);
if (! vectors->bounds_valid)
{
PikaStroke *stroke;
vectors->bounds_empty = TRUE;
vectors->bounds_x1 = vectors->bounds_x2 = 0.0;
vectors->bounds_y1 = vectors->bounds_y2 = 0.0;
for (stroke = pika_vectors_stroke_get_next (vectors, NULL);
stroke;
stroke = pika_vectors_stroke_get_next (vectors, stroke))
{
GArray *stroke_coords;
gboolean closed;
stroke_coords = pika_stroke_interpolate (stroke, 1.0, &closed);
if (stroke_coords)
{
PikaCoords point;
gint i;
if (vectors->bounds_empty && stroke_coords->len > 0)
{
point = g_array_index (stroke_coords, PikaCoords, 0);
vectors->bounds_x1 = vectors->bounds_x2 = point.x;
vectors->bounds_y1 = vectors->bounds_y2 = point.y;
vectors->bounds_empty = FALSE;
}
for (i = 0; i < stroke_coords->len; i++)
{
point = g_array_index (stroke_coords, PikaCoords, i);
vectors->bounds_x1 = MIN (vectors->bounds_x1, point.x);
vectors->bounds_y1 = MIN (vectors->bounds_y1, point.y);
vectors->bounds_x2 = MAX (vectors->bounds_x2, point.x);
vectors->bounds_y2 = MAX (vectors->bounds_y2, point.y);
}
g_array_free (stroke_coords, TRUE);
}
}
vectors->bounds_valid = TRUE;
}
*x = vectors->bounds_x1;
*y = vectors->bounds_y1;
*width = vectors->bounds_x2 - vectors->bounds_x1;
*height = vectors->bounds_y2 - vectors->bounds_y1;
return ! vectors->bounds_empty;
}
static PikaItem *
pika_vectors_duplicate (PikaItem *item,
GType new_type)
{
PikaItem *new_item;
g_return_val_if_fail (g_type_is_a (new_type, PIKA_TYPE_VECTORS), NULL);
new_item = PIKA_ITEM_CLASS (parent_class)->duplicate (item, new_type);
if (PIKA_IS_VECTORS (new_item))
{
PikaVectors *vectors = PIKA_VECTORS (item);
PikaVectors *new_vectors = PIKA_VECTORS (new_item);
pika_vectors_copy_strokes (vectors, new_vectors);
}
return new_item;
}
static void
pika_vectors_convert (PikaItem *item,
PikaImage *dest_image,
GType old_type)
{
pika_item_set_size (item,
pika_image_get_width (dest_image),
pika_image_get_height (dest_image));
PIKA_ITEM_CLASS (parent_class)->convert (item, dest_image, old_type);
}
static void
pika_vectors_translate (PikaItem *item,
gdouble offset_x,
gdouble offset_y,
gboolean push_undo)
{
PikaVectors *vectors = PIKA_VECTORS (item);
GList *list;
pika_vectors_freeze (vectors);
if (push_undo)
pika_image_undo_push_vectors_mod (pika_item_get_image (item),
_("Move Path"),
vectors);
for (list = vectors->strokes->head; list; list = g_list_next (list))
{
PikaStroke *stroke = list->data;
pika_stroke_translate (stroke, offset_x, offset_y);
}
pika_vectors_thaw (vectors);
}
static void
pika_vectors_scale (PikaItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
PikaInterpolationType interpolation_type,
PikaProgress *progress)
{
PikaVectors *vectors = PIKA_VECTORS (item);
PikaImage *image = pika_item_get_image (item);
GList *list;
pika_vectors_freeze (vectors);
if (pika_item_is_attached (item))
pika_image_undo_push_vectors_mod (image, NULL, vectors);
for (list = vectors->strokes->head; list; list = g_list_next (list))
{
PikaStroke *stroke = list->data;
pika_stroke_scale (stroke,
(gdouble) new_width / (gdouble) pika_item_get_width (item),
(gdouble) new_height / (gdouble) pika_item_get_height (item));
pika_stroke_translate (stroke, new_offset_x, new_offset_y);
}
PIKA_ITEM_CLASS (parent_class)->scale (item,
pika_image_get_width (image),
pika_image_get_height (image),
0, 0,
interpolation_type, progress);
pika_vectors_thaw (vectors);
}
static void
pika_vectors_resize (PikaItem *item,
PikaContext *context,
PikaFillType fill_type,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y)
{
PikaVectors *vectors = PIKA_VECTORS (item);
PikaImage *image = pika_item_get_image (item);
GList *list;
pika_vectors_freeze (vectors);
if (pika_item_is_attached (item))
pika_image_undo_push_vectors_mod (image, NULL, vectors);
for (list = vectors->strokes->head; list; list = g_list_next (list))
{
PikaStroke *stroke = list->data;
pika_stroke_translate (stroke, offset_x, offset_y);
}
PIKA_ITEM_CLASS (parent_class)->resize (item, context, fill_type,
pika_image_get_width (image),
pika_image_get_height (image),
0, 0);
pika_vectors_thaw (vectors);
}
static void
pika_vectors_flip (PikaItem *item,
PikaContext *context,
PikaOrientationType flip_type,
gdouble axis,
gboolean clip_result)
{
PikaVectors *vectors = PIKA_VECTORS (item);
GList *list;
PikaMatrix3 matrix;
pika_matrix3_identity (&matrix);
pika_transform_matrix_flip (&matrix, flip_type, axis);
pika_vectors_freeze (vectors);
pika_image_undo_push_vectors_mod (pika_item_get_image (item),
_("Flip Path"),
vectors);
for (list = vectors->strokes->head; list; list = g_list_next (list))
{
PikaStroke *stroke = list->data;
pika_stroke_transform (stroke, &matrix, NULL);
}
pika_vectors_thaw (vectors);
}
static void
pika_vectors_rotate (PikaItem *item,
PikaContext *context,
PikaRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result)
{
PikaVectors *vectors = PIKA_VECTORS (item);
GList *list;
PikaMatrix3 matrix;
pika_matrix3_identity (&matrix);
pika_transform_matrix_rotate (&matrix, rotate_type, center_x, center_y);
pika_vectors_freeze (vectors);
pika_image_undo_push_vectors_mod (pika_item_get_image (item),
_("Rotate Path"),
vectors);
for (list = vectors->strokes->head; list; list = g_list_next (list))
{
PikaStroke *stroke = list->data;
pika_stroke_transform (stroke, &matrix, NULL);
}
pika_vectors_thaw (vectors);
}
static void
pika_vectors_transform (PikaItem *item,
PikaContext *context,
const PikaMatrix3 *matrix,
PikaTransformDirection direction,
PikaInterpolationType interpolation_type,
PikaTransformResize clip_result,
PikaProgress *progress)
{
PikaVectors *vectors = PIKA_VECTORS (item);
PikaMatrix3 local_matrix;
GQueue strokes;
GList *list;
pika_vectors_freeze (vectors);
pika_image_undo_push_vectors_mod (pika_item_get_image (item),
_("Transform Path"),
vectors);
local_matrix = *matrix;
if (direction == PIKA_TRANSFORM_BACKWARD)
pika_matrix3_invert (&local_matrix);
g_queue_init (&strokes);
while (! g_queue_is_empty (vectors->strokes))
{
PikaStroke *stroke = g_queue_peek_head (vectors->strokes);
g_object_ref (stroke);
pika_vectors_stroke_remove (vectors, stroke);
pika_stroke_transform (stroke, &local_matrix, &strokes);
g_object_unref (stroke);
}
vectors->last_stroke_id = 0;
for (list = strokes.head; list; list = g_list_next (list))
{
PikaStroke *stroke = list->data;
pika_vectors_stroke_add (vectors, stroke);
g_object_unref (stroke);
}
g_queue_clear (&strokes);
pika_vectors_thaw (vectors);
}
static PikaTransformResize
pika_vectors_get_clip (PikaItem *item,
PikaTransformResize clip_result)
{
return PIKA_TRANSFORM_RESIZE_ADJUST;
}
static gboolean
pika_vectors_fill (PikaItem *item,
PikaDrawable *drawable,
PikaFillOptions *fill_options,
gboolean push_undo,
PikaProgress *progress,
GError **error)
{
PikaVectors *vectors = PIKA_VECTORS (item);
if (g_queue_is_empty (vectors->strokes))
{
g_set_error_literal (error, PIKA_ERROR, PIKA_FAILED,
_("Not enough points to fill"));
return FALSE;
}
return pika_drawable_fill_vectors (drawable, fill_options,
vectors, push_undo, error);
}
static gboolean
pika_vectors_stroke (PikaItem *item,
PikaDrawable *drawable,
PikaStrokeOptions *stroke_options,
gboolean push_undo,
PikaProgress *progress,
GError **error)
{
PikaVectors *vectors = PIKA_VECTORS (item);
gboolean retval = FALSE;
if (g_queue_is_empty (vectors->strokes))
{
g_set_error_literal (error, PIKA_ERROR, PIKA_FAILED,
_("Not enough points to stroke"));
return FALSE;
}
switch (pika_stroke_options_get_method (stroke_options))
{
case PIKA_STROKE_LINE:
retval = pika_drawable_stroke_vectors (drawable, stroke_options,
vectors, push_undo, error);
break;
case PIKA_STROKE_PAINT_METHOD:
{
PikaPaintInfo *paint_info;
PikaPaintCore *core;
PikaPaintOptions *paint_options;
gboolean emulate_dynamics;
paint_info = pika_context_get_paint_info (PIKA_CONTEXT (stroke_options));
core = g_object_new (paint_info->paint_type, NULL);
paint_options = pika_stroke_options_get_paint_options (stroke_options);
emulate_dynamics = pika_stroke_options_get_emulate_dynamics (stroke_options);
retval = pika_paint_core_stroke_vectors (core, drawable,
paint_options,
emulate_dynamics,
vectors, push_undo, error);
g_object_unref (core);
}
break;
default:
g_return_val_if_reached (FALSE);
}
return retval;
}
static void
pika_vectors_to_selection (PikaItem *item,
PikaChannelOps op,
gboolean antialias,
gboolean feather,
gdouble feather_radius_x,
gdouble feather_radius_y)
{
PikaVectors *vectors = PIKA_VECTORS (item);
PikaImage *image = pika_item_get_image (item);
pika_channel_select_vectors (pika_image_get_mask (image),
PIKA_ITEM_GET_CLASS (item)->to_selection_desc,
vectors,
op, antialias,
feather, feather_radius_x, feather_radius_x,
TRUE);
}
static void
pika_vectors_real_freeze (PikaVectors *vectors)
{
/* release cached bezier representation */
if (vectors->bezier_desc)
{
pika_bezier_desc_free (vectors->bezier_desc);
vectors->bezier_desc = NULL;
}
/* invalidate bounds */
vectors->bounds_valid = FALSE;
}
static void
pika_vectors_real_thaw (PikaVectors *vectors)
{
pika_viewable_invalidate_preview (PIKA_VIEWABLE (vectors));
}
/* public functions */
PikaVectors *
pika_vectors_new (PikaImage *image,
const gchar *name)
{
PikaVectors *vectors;
g_return_val_if_fail (PIKA_IS_IMAGE (image), NULL);
vectors = PIKA_VECTORS (pika_item_new (PIKA_TYPE_VECTORS,
image, name,
0, 0,
pika_image_get_width (image),
pika_image_get_height (image)));
return vectors;
}
PikaVectors *
pika_vectors_get_parent (PikaVectors *vectors)
{
g_return_val_if_fail (PIKA_IS_VECTORS (vectors), NULL);
return PIKA_VECTORS (pika_viewable_get_parent (PIKA_VIEWABLE (vectors)));
}
void
pika_vectors_freeze (PikaVectors *vectors)
{
g_return_if_fail (PIKA_IS_VECTORS (vectors));
vectors->freeze_count++;
if (vectors->freeze_count == 1)
g_signal_emit (vectors, pika_vectors_signals[FREEZE], 0);
}
void
pika_vectors_thaw (PikaVectors *vectors)
{
g_return_if_fail (PIKA_IS_VECTORS (vectors));
g_return_if_fail (vectors->freeze_count > 0);
vectors->freeze_count--;
if (vectors->freeze_count == 0)
g_signal_emit (vectors, pika_vectors_signals[THAW], 0);
}
void
pika_vectors_copy_strokes (PikaVectors *src_vectors,
PikaVectors *dest_vectors)
{
g_return_if_fail (PIKA_IS_VECTORS (src_vectors));
g_return_if_fail (PIKA_IS_VECTORS (dest_vectors));
pika_vectors_freeze (dest_vectors);
g_queue_free_full (dest_vectors->strokes, (GDestroyNotify) g_object_unref);
dest_vectors->strokes = g_queue_new ();
g_hash_table_remove_all (dest_vectors->stroke_to_list);
dest_vectors->last_stroke_id = 0;
pika_vectors_add_strokes (src_vectors, dest_vectors);
pika_vectors_thaw (dest_vectors);
}
void
pika_vectors_add_strokes (PikaVectors *src_vectors,
PikaVectors *dest_vectors)
{
GList *stroke;
g_return_if_fail (PIKA_IS_VECTORS (src_vectors));
g_return_if_fail (PIKA_IS_VECTORS (dest_vectors));
pika_vectors_freeze (dest_vectors);
for (stroke = src_vectors->strokes->head;
stroke != NULL;
stroke = g_list_next (stroke))
{
PikaStroke *newstroke = pika_stroke_duplicate (stroke->data);
g_queue_push_tail (dest_vectors->strokes, newstroke);
/* Also add to {stroke: GList node} map */
g_hash_table_insert (dest_vectors->stroke_to_list,
newstroke,
g_queue_peek_tail_link (dest_vectors->strokes));
dest_vectors->last_stroke_id++;
pika_stroke_set_id (newstroke,
dest_vectors->last_stroke_id);
}
pika_vectors_thaw (dest_vectors);
}
void
pika_vectors_stroke_add (PikaVectors *vectors,
PikaStroke *stroke)
{
g_return_if_fail (PIKA_IS_VECTORS (vectors));
g_return_if_fail (PIKA_IS_STROKE (stroke));
pika_vectors_freeze (vectors);
PIKA_VECTORS_GET_CLASS (vectors)->stroke_add (vectors, stroke);
pika_vectors_thaw (vectors);
}
static void
pika_vectors_real_stroke_add (PikaVectors *vectors,
PikaStroke *stroke)
{
/*
* Don't prepend into vector->strokes. See ChangeLog 2003-05-21
* --Mitch
*/
g_queue_push_tail (vectors->strokes, g_object_ref (stroke));
/* Also add to {stroke: GList node} map */
g_hash_table_insert (vectors->stroke_to_list,
stroke,
g_queue_peek_tail_link (vectors->strokes));
vectors->last_stroke_id++;
pika_stroke_set_id (stroke, vectors->last_stroke_id);
}
void
pika_vectors_stroke_remove (PikaVectors *vectors,
PikaStroke *stroke)
{
g_return_if_fail (PIKA_IS_VECTORS (vectors));
g_return_if_fail (PIKA_IS_STROKE (stroke));
pika_vectors_freeze (vectors);
PIKA_VECTORS_GET_CLASS (vectors)->stroke_remove (vectors, stroke);
pika_vectors_thaw (vectors);
}
static void
pika_vectors_real_stroke_remove (PikaVectors *vectors,
PikaStroke *stroke)
{
GList *list = g_hash_table_lookup (vectors->stroke_to_list, stroke);
if (list)
{
g_queue_delete_link (vectors->strokes, list);
g_hash_table_remove (vectors->stroke_to_list, stroke);
g_object_unref (stroke);
}
}
gint
pika_vectors_get_n_strokes (PikaVectors *vectors)
{
g_return_val_if_fail (PIKA_IS_VECTORS (vectors), 0);
return g_queue_get_length (vectors->strokes);
}
PikaStroke *
pika_vectors_stroke_get (PikaVectors *vectors,
const PikaCoords *coord)
{
g_return_val_if_fail (PIKA_IS_VECTORS (vectors), NULL);
return PIKA_VECTORS_GET_CLASS (vectors)->stroke_get (vectors, coord);
}
static PikaStroke *
pika_vectors_real_stroke_get (PikaVectors *vectors,
const PikaCoords *coord)
{
PikaStroke *minstroke = NULL;
gdouble mindist = G_MAXDOUBLE;
GList *list;
for (list = vectors->strokes->head; list; list = g_list_next (list))
{
PikaStroke *stroke = list->data;
PikaAnchor *anchor = pika_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;
}
PikaStroke *
pika_vectors_stroke_get_by_id (PikaVectors *vectors,
gint id)
{
GList *list;
g_return_val_if_fail (PIKA_IS_VECTORS (vectors), NULL);
for (list = vectors->strokes->head; list; list = g_list_next (list))
{
if (pika_stroke_get_id (list->data) == id)
return list->data;
}
return NULL;
}
PikaStroke *
pika_vectors_stroke_get_next (PikaVectors *vectors,
PikaStroke *prev)
{
g_return_val_if_fail (PIKA_IS_VECTORS (vectors), NULL);
return PIKA_VECTORS_GET_CLASS (vectors)->stroke_get_next (vectors, prev);
}
static PikaStroke *
pika_vectors_real_stroke_get_next (PikaVectors *vectors,
PikaStroke *prev)
{
if (! prev)
{
return g_queue_peek_head (vectors->strokes);
}
else
{
GList *stroke = g_hash_table_lookup (vectors->stroke_to_list, prev);
g_return_val_if_fail (stroke != NULL, NULL);
return stroke->next ? stroke->next->data : NULL;
}
}
gdouble
pika_vectors_stroke_get_length (PikaVectors *vectors,
PikaStroke *stroke)
{
g_return_val_if_fail (PIKA_IS_VECTORS (vectors), 0.0);
g_return_val_if_fail (PIKA_IS_STROKE (stroke), 0.0);
return PIKA_VECTORS_GET_CLASS (vectors)->stroke_get_length (vectors, stroke);
}
static gdouble
pika_vectors_real_stroke_get_length (PikaVectors *vectors,
PikaStroke *stroke)
{
g_return_val_if_fail (PIKA_IS_VECTORS (vectors), 0.0);
g_return_val_if_fail (PIKA_IS_STROKE (stroke), 0.0);
return pika_stroke_get_length (stroke, vectors->precision);
}
PikaAnchor *
pika_vectors_anchor_get (PikaVectors *vectors,
const PikaCoords *coord,
PikaStroke **ret_stroke)
{
g_return_val_if_fail (PIKA_IS_VECTORS (vectors), NULL);
return PIKA_VECTORS_GET_CLASS (vectors)->anchor_get (vectors, coord,
ret_stroke);
}
static PikaAnchor *
pika_vectors_real_anchor_get (PikaVectors *vectors,
const PikaCoords *coord,
PikaStroke **ret_stroke)
{
PikaAnchor *minanchor = NULL;
gdouble mindist = -1;
GList *list;
for (list = vectors->strokes->head; list; list = g_list_next (list))
{
PikaStroke *stroke = list->data;
PikaAnchor *anchor = pika_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
pika_vectors_anchor_delete (PikaVectors *vectors,
PikaAnchor *anchor)
{
g_return_if_fail (PIKA_IS_VECTORS (vectors));
g_return_if_fail (anchor != NULL);
PIKA_VECTORS_GET_CLASS (vectors)->anchor_delete (vectors, anchor);
}
static void
pika_vectors_real_anchor_delete (PikaVectors *vectors,
PikaAnchor *anchor)
{
}
void
pika_vectors_anchor_select (PikaVectors *vectors,
PikaStroke *target_stroke,
PikaAnchor *anchor,
gboolean selected,
gboolean exclusive)
{
GList *list;
for (list = vectors->strokes->head; list; list = g_list_next (list))
{
PikaStroke *stroke = list->data;
pika_stroke_anchor_select (stroke,
stroke == target_stroke ? anchor : NULL,
selected, exclusive);
}
}
gdouble
pika_vectors_get_length (PikaVectors *vectors,
const PikaAnchor *start)
{
g_return_val_if_fail (PIKA_IS_VECTORS (vectors), 0.0);
return PIKA_VECTORS_GET_CLASS (vectors)->get_length (vectors, start);
}
static gdouble
pika_vectors_real_get_length (PikaVectors *vectors,
const PikaAnchor *start)
{
g_printerr ("pika_vectors_get_length: default implementation\n");
return 0;
}
gdouble
pika_vectors_get_distance (PikaVectors *vectors,
const PikaCoords *coord)
{
g_return_val_if_fail (PIKA_IS_VECTORS (vectors), 0.0);
return PIKA_VECTORS_GET_CLASS (vectors)->get_distance (vectors, coord);
}
static gdouble
pika_vectors_real_get_distance (PikaVectors *vectors,
const PikaCoords *coord)
{
g_printerr ("pika_vectors_get_distance: default implementation\n");
return 0;
}
gint
pika_vectors_interpolate (PikaVectors *vectors,
PikaStroke *stroke,
gdouble precision,
gint max_points,
PikaCoords *ret_coords)
{
g_return_val_if_fail (PIKA_IS_VECTORS (vectors), 0);
return PIKA_VECTORS_GET_CLASS (vectors)->interpolate (vectors, stroke,
precision, max_points,
ret_coords);
}
static gint
pika_vectors_real_interpolate (PikaVectors *vectors,
PikaStroke *stroke,
gdouble precision,
gint max_points,
PikaCoords *ret_coords)
{
g_printerr ("pika_vectors_interpolate: default implementation\n");
return 0;
}
const PikaBezierDesc *
pika_vectors_get_bezier (PikaVectors *vectors)
{
g_return_val_if_fail (PIKA_IS_VECTORS (vectors), NULL);
if (! vectors->bezier_desc)
{
vectors->bezier_desc = pika_vectors_make_bezier (vectors);
}
return vectors->bezier_desc;
}
static PikaBezierDesc *
pika_vectors_make_bezier (PikaVectors *vectors)
{
return PIKA_VECTORS_GET_CLASS (vectors)->make_bezier (vectors);
}
static PikaBezierDesc *
pika_vectors_real_make_bezier (PikaVectors *vectors)
{
PikaStroke *stroke;
GArray *cmd_array;
PikaBezierDesc *ret_bezdesc = NULL;
cmd_array = g_array_new (FALSE, FALSE, sizeof (cairo_path_data_t));
for (stroke = pika_vectors_stroke_get_next (vectors, NULL);
stroke;
stroke = pika_vectors_stroke_get_next (vectors, stroke))
{
PikaBezierDesc *bezdesc = pika_stroke_make_bezier (stroke);
if (bezdesc)
{
cmd_array = g_array_append_vals (cmd_array, bezdesc->data,
bezdesc->num_data);
pika_bezier_desc_free (bezdesc);
}
}
if (cmd_array->len > 0)
ret_bezdesc = pika_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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