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gimp/app/vectors/gimpvectors.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpvectors.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 <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <cairo.h>
#include "libgimpcolor/gimpcolor.h"
#include "libgimpmath/gimpmath.h"
#include "vectors-types.h"
#include "core/gimp.h"
#include "core/gimpcontainer.h"
#include "core/gimpcontext.h"
#include "core/gimpdrawable-stroke.h"
#include "core/gimp-transform-utils.h"
#include "core/gimpimage.h"
#include "core/gimpimage-undo-push.h"
#include "core/gimpmarshal.h"
#include "core/gimppaintinfo.h"
#include "core/gimpstrokeoptions.h"
#include "paint/gimppaintcore-stroke.h"
#include "paint/gimppaintoptions.h"
#include "gimpanchor.h"
#include "gimpstroke.h"
#include "gimpvectors.h"
#include "gimpvectors-preview.h"
#include "gimp-intl.h"
enum
{
FREEZE,
THAW,
LAST_SIGNAL
};
static void gimp_vectors_finalize (GObject *object);
static gint64 gimp_vectors_get_memsize (GimpObject *object,
gint64 *gui_size);
static gboolean gimp_vectors_is_attached (const GimpItem *item);
static GimpItemTree * gimp_vectors_get_tree (GimpItem *item);
static GimpItem * gimp_vectors_duplicate (GimpItem *item,
GType new_type);
static void gimp_vectors_convert (GimpItem *item,
GimpImage *dest_image);
static void gimp_vectors_translate (GimpItem *item,
gint offset_x,
gint offset_y,
gboolean push_undo);
static void gimp_vectors_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_vectors_resize (GimpItem *item,
GimpContext *context,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y);
static void gimp_vectors_flip (GimpItem *item,
GimpContext *context,
GimpOrientationType flip_type,
gdouble axis,
gboolean clip_result);
static void gimp_vectors_rotate (GimpItem *item,
GimpContext *context,
GimpRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result);
static void gimp_vectors_transform (GimpItem *item,
GimpContext *context,
const GimpMatrix3 *matrix,
GimpTransformDirection direction,
GimpInterpolationType interp_type,
gint recursion_level,
GimpTransformResize clip_result,
GimpProgress *progress);
static gboolean gimp_vectors_stroke (GimpItem *item,
GimpDrawable *drawable,
GimpStrokeOptions *stroke_options,
gboolean push_undo,
GimpProgress *progress,
GError **error);
static void gimp_vectors_real_thaw (GimpVectors *vectors);
static void gimp_vectors_real_stroke_add (GimpVectors *vectors,
GimpStroke *stroke);
static void gimp_vectors_real_stroke_remove (GimpVectors *vectors,
GimpStroke *stroke);
static GimpStroke * gimp_vectors_real_stroke_get (const GimpVectors *vectors,
const GimpCoords *coord);
static GimpStroke *gimp_vectors_real_stroke_get_next(const GimpVectors *vectors,
const GimpStroke *prev);
static gdouble gimp_vectors_real_stroke_get_length (const GimpVectors *vectors,
const GimpStroke *prev);
static GimpAnchor * gimp_vectors_real_anchor_get (const GimpVectors *vectors,
const GimpCoords *coord,
GimpStroke **ret_stroke);
static void gimp_vectors_real_anchor_delete (GimpVectors *vectors,
GimpAnchor *anchor);
static gdouble gimp_vectors_real_get_length (const GimpVectors *vectors,
const GimpAnchor *start);
static gdouble gimp_vectors_real_get_distance (const GimpVectors *vectors,
const GimpCoords *coord);
static gint gimp_vectors_real_interpolate (const GimpVectors *vectors,
const GimpStroke *stroke,
gdouble precision,
gint max_points,
GimpCoords *ret_coords);
static GimpBezierDesc * gimp_vectors_real_make_bezier (const GimpVectors *vectors);
G_DEFINE_TYPE (GimpVectors, gimp_vectors, GIMP_TYPE_ITEM)
#define parent_class gimp_vectors_parent_class
static guint gimp_vectors_signals[LAST_SIGNAL] = { 0 };
static void
gimp_vectors_class_init (GimpVectorsClass *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_vectors_signals[FREEZE] =
g_signal_new ("freeze",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpVectorsClass, freeze),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
gimp_vectors_signals[THAW] =
g_signal_new ("thaw",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpVectorsClass, thaw),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
object_class->finalize = gimp_vectors_finalize;
gimp_object_class->get_memsize = gimp_vectors_get_memsize;
viewable_class->get_new_preview = gimp_vectors_get_new_preview;
viewable_class->default_stock_id = "gimp-path";
item_class->is_attached = gimp_vectors_is_attached;
item_class->get_tree = gimp_vectors_get_tree;
item_class->duplicate = gimp_vectors_duplicate;
item_class->convert = gimp_vectors_convert;
item_class->translate = gimp_vectors_translate;
item_class->scale = gimp_vectors_scale;
item_class->resize = gimp_vectors_resize;
item_class->flip = gimp_vectors_flip;
item_class->rotate = gimp_vectors_rotate;
item_class->transform = gimp_vectors_transform;
item_class->stroke = gimp_vectors_stroke;
item_class->default_name = _("Path");
item_class->rename_desc = _("Rename Path");
item_class->translate_desc = _("Move Path");
item_class->scale_desc = _("Scale Path");
item_class->resize_desc = _("Resize Path");
item_class->flip_desc = _("Flip Path");
item_class->rotate_desc = _("Rotate Path");
item_class->transform_desc = _("Transform Path");
item_class->stroke_desc = _("Stroke Path");
klass->freeze = NULL;
klass->thaw = gimp_vectors_real_thaw;
klass->stroke_add = gimp_vectors_real_stroke_add;
klass->stroke_remove = gimp_vectors_real_stroke_remove;
klass->stroke_get = gimp_vectors_real_stroke_get;
klass->stroke_get_next = gimp_vectors_real_stroke_get_next;
klass->stroke_get_length = gimp_vectors_real_stroke_get_length;
klass->anchor_get = gimp_vectors_real_anchor_get;
klass->anchor_delete = gimp_vectors_real_anchor_delete;
klass->get_length = gimp_vectors_real_get_length;
klass->get_distance = gimp_vectors_real_get_distance;
klass->interpolate = gimp_vectors_real_interpolate;
klass->make_bezier = gimp_vectors_real_make_bezier;
}
static void
gimp_vectors_init (GimpVectors *vectors)
{
gimp_item_set_visible (GIMP_ITEM (vectors), FALSE, FALSE);
vectors->strokes = NULL;
vectors->last_stroke_ID = 0;
vectors->freeze_count = 0;
vectors->precision = 0.2;
}
static void
gimp_vectors_finalize (GObject *object)
{
GimpVectors *vectors = GIMP_VECTORS (object);
if (vectors->strokes)
{
g_list_foreach (vectors->strokes, (GFunc) g_object_unref, NULL);
g_list_free (vectors->strokes);
vectors->strokes = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gint64
gimp_vectors_get_memsize (GimpObject *object,
gint64 *gui_size)
{
GimpVectors *vectors;
GList *list;
gint64 memsize = 0;
vectors = GIMP_VECTORS (object);
for (list = vectors->strokes; 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_vectors_is_attached (const GimpItem *item)
{
GimpImage *image = gimp_item_get_image (item);
return (GIMP_IS_IMAGE (image) &&
gimp_container_have (gimp_image_get_vectors (image),
GIMP_OBJECT (item)));
}
static GimpItemTree *
gimp_vectors_get_tree (GimpItem *item)
{
if (gimp_item_is_attached (item))
{
GimpImage *image = gimp_item_get_image (item);
return gimp_image_get_vectors_tree (image);
}
return NULL;
}
static GimpItem *
gimp_vectors_duplicate (GimpItem *item,
GType new_type)
{
GimpItem *new_item;
g_return_val_if_fail (g_type_is_a (new_type, GIMP_TYPE_VECTORS), NULL);
new_item = GIMP_ITEM_CLASS (parent_class)->duplicate (item, new_type);
if (GIMP_IS_VECTORS (new_item))
{
GimpVectors *vectors = GIMP_VECTORS (item);
GimpVectors *new_vectors = GIMP_VECTORS (new_item);
gimp_vectors_copy_strokes (vectors, new_vectors);
}
return new_item;
}
static void
gimp_vectors_convert (GimpItem *item,
GimpImage *dest_image)
{
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);
}
static void
gimp_vectors_translate (GimpItem *item,
gint offset_x,
gint offset_y,
gboolean push_undo)
{
GimpVectors *vectors = GIMP_VECTORS (item);
GList *list;
gimp_vectors_freeze (vectors);
if (push_undo)
gimp_image_undo_push_vectors_mod (gimp_item_get_image (item),
_("Move Path"),
vectors);
for (list = vectors->strokes; list; list = g_list_next (list))
{
GimpStroke *stroke = list->data;
gimp_stroke_translate (stroke, offset_x, offset_y);
}
gimp_vectors_thaw (vectors);
}
static void
gimp_vectors_scale (GimpItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
GimpInterpolationType interpolation_type,
GimpProgress *progress)
{
GimpVectors *vectors = GIMP_VECTORS (item);
GimpImage *image = gimp_item_get_image (item);
GList *list;
gimp_vectors_freeze (vectors);
if (gimp_item_is_attached (item))
gimp_image_undo_push_vectors_mod (image, NULL, vectors);
for (list = vectors->strokes; 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_vectors_thaw (vectors);
}
static void
gimp_vectors_resize (GimpItem *item,
GimpContext *context,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y)
{
GimpVectors *vectors = GIMP_VECTORS (item);
GimpImage *image = gimp_item_get_image (item);
GList *list;
gimp_vectors_freeze (vectors);
if (gimp_item_is_attached (item))
gimp_image_undo_push_vectors_mod (image, NULL, vectors);
for (list = vectors->strokes; 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,
gimp_image_get_width (image),
gimp_image_get_height (image),
0, 0);
gimp_vectors_thaw (vectors);
}
static void
gimp_vectors_flip (GimpItem *item,
GimpContext *context,
GimpOrientationType flip_type,
gdouble axis,
gboolean clip_result)
{
GimpVectors *vectors = GIMP_VECTORS (item);
GList *list;
GimpMatrix3 matrix;
gimp_matrix3_identity (&matrix);
gimp_transform_matrix_flip (&matrix, flip_type, axis);
gimp_vectors_freeze (vectors);
gimp_image_undo_push_vectors_mod (gimp_item_get_image (item),
_("Flip Path"),
vectors);
for (list = vectors->strokes; list; list = g_list_next (list))
{
GimpStroke *stroke = list->data;
gimp_stroke_transform (stroke, &matrix);
}
gimp_vectors_thaw (vectors);
}
static void
gimp_vectors_rotate (GimpItem *item,
GimpContext *context,
GimpRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result)
{
GimpVectors *vectors = GIMP_VECTORS (item);
GList *list;
GimpMatrix3 matrix;
gimp_matrix3_identity (&matrix);
gimp_transform_matrix_rotate (&matrix, rotate_type, center_x, center_y);
gimp_vectors_freeze (vectors);
gimp_image_undo_push_vectors_mod (gimp_item_get_image (item),
_("Rotate Path"),
vectors);
for (list = vectors->strokes; list; list = g_list_next (list))
{
GimpStroke *stroke = list->data;
gimp_stroke_transform (stroke, &matrix);
}
gimp_vectors_thaw (vectors);
}
static void
gimp_vectors_transform (GimpItem *item,
GimpContext *context,
const GimpMatrix3 *matrix,
GimpTransformDirection direction,
GimpInterpolationType interpolation_type,
gint recursion_level,
GimpTransformResize clip_result,
GimpProgress *progress)
{
GimpVectors *vectors = GIMP_VECTORS (item);
GimpMatrix3 local_matrix;
GList *list;
gimp_vectors_freeze (vectors);
gimp_image_undo_push_vectors_mod (gimp_item_get_image (item),
_("Transform Path"),
vectors);
local_matrix = *matrix;
if (direction == GIMP_TRANSFORM_BACKWARD)
gimp_matrix3_invert (&local_matrix);
for (list = vectors->strokes; list; list = g_list_next (list))
{
GimpStroke *stroke = list->data;
gimp_stroke_transform (stroke, &local_matrix);
}
gimp_vectors_thaw (vectors);
}
static gboolean
gimp_vectors_stroke (GimpItem *item,
GimpDrawable *drawable,
GimpStrokeOptions *stroke_options,
gboolean push_undo,
GimpProgress *progress,
GError **error)
{
GimpVectors *vectors = GIMP_VECTORS (item);
gboolean retval = FALSE;
/* return successfully on an empty path, there's nothing to stroke */
if (! vectors->strokes)
return TRUE;
switch (stroke_options->method)
{
case GIMP_STROKE_METHOD_LIBART:
gimp_drawable_stroke_vectors (drawable,
stroke_options,
vectors, push_undo);
retval = TRUE;
break;
case GIMP_STROKE_METHOD_PAINT_CORE:
{
GimpPaintInfo *paint_info;
GimpPaintCore *core;
paint_info = gimp_context_get_paint_info (GIMP_CONTEXT (stroke_options));
core = g_object_new (paint_info->paint_type, NULL);
retval = gimp_paint_core_stroke_vectors (core, drawable,
stroke_options->paint_options,
stroke_options->emulate_dynamics,
vectors, push_undo, error);
g_object_unref (core);
}
break;
default:
g_return_val_if_reached (FALSE);
}
return retval;
}
static void
gimp_vectors_real_thaw (GimpVectors *vectors)
{
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (vectors));
}
/* public functions */
GimpVectors *
gimp_vectors_new (GimpImage *image,
const gchar *name)
{
GimpVectors *vectors;
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
vectors = g_object_new (GIMP_TYPE_VECTORS, NULL);
gimp_item_configure (GIMP_ITEM (vectors), image,
0, 0,
gimp_image_get_width (image),
gimp_image_get_height (image),
name);
return vectors;
}
GimpVectors *
gimp_vectors_get_parent (GimpVectors *vectors)
{
g_return_val_if_fail (GIMP_IS_VECTORS (vectors), NULL);
return GIMP_VECTORS (gimp_viewable_get_parent (GIMP_VIEWABLE (vectors)));
}
void
gimp_vectors_freeze (GimpVectors *vectors)
{
g_return_if_fail (GIMP_IS_VECTORS (vectors));
vectors->freeze_count++;
if (vectors->freeze_count == 1)
g_signal_emit (vectors, gimp_vectors_signals[FREEZE], 0);
}
void
gimp_vectors_thaw (GimpVectors *vectors)
{
g_return_if_fail (GIMP_IS_VECTORS (vectors));
g_return_if_fail (vectors->freeze_count > 0);
vectors->freeze_count--;
if (vectors->freeze_count == 0)
g_signal_emit (vectors, gimp_vectors_signals[THAW], 0);
}
void
gimp_vectors_copy_strokes (const GimpVectors *src_vectors,
GimpVectors *dest_vectors)
{
g_return_if_fail (GIMP_IS_VECTORS (src_vectors));
g_return_if_fail (GIMP_IS_VECTORS (dest_vectors));
gimp_vectors_freeze (dest_vectors);
if (dest_vectors->strokes)
{
g_list_foreach (dest_vectors->strokes, (GFunc) g_object_unref, NULL);
g_list_free (dest_vectors->strokes);
}
dest_vectors->strokes = NULL;
dest_vectors->last_stroke_ID = 0;
gimp_vectors_add_strokes (src_vectors, dest_vectors);
gimp_vectors_thaw (dest_vectors);
}
void
gimp_vectors_add_strokes (const GimpVectors *src_vectors,
GimpVectors *dest_vectors)
{
GList *current_lstroke;
GList *strokes_copy;
g_return_if_fail (GIMP_IS_VECTORS (src_vectors));
g_return_if_fail (GIMP_IS_VECTORS (dest_vectors));
gimp_vectors_freeze (dest_vectors);
strokes_copy = g_list_copy (src_vectors->strokes);
current_lstroke = strokes_copy;
while (current_lstroke)
{
current_lstroke->data = gimp_stroke_duplicate (current_lstroke->data);
dest_vectors->last_stroke_ID ++;
gimp_stroke_set_ID (current_lstroke->data,
dest_vectors->last_stroke_ID);
current_lstroke = g_list_next (current_lstroke);
}
dest_vectors->strokes = g_list_concat (dest_vectors->strokes, strokes_copy);
gimp_vectors_thaw (dest_vectors);
}
void
gimp_vectors_stroke_add (GimpVectors *vectors,
GimpStroke *stroke)
{
g_return_if_fail (GIMP_IS_VECTORS (vectors));
g_return_if_fail (GIMP_IS_STROKE (stroke));
gimp_vectors_freeze (vectors);
GIMP_VECTORS_GET_CLASS (vectors)->stroke_add (vectors, stroke);
gimp_vectors_thaw (vectors);
}
static void
gimp_vectors_real_stroke_add (GimpVectors *vectors,
GimpStroke *stroke)
{
/* Don't g_list_prepend() here. See ChangeLog 2003-05-21 --Mitch */
vectors->strokes = g_list_append (vectors->strokes, stroke);
vectors->last_stroke_ID ++;
gimp_stroke_set_ID (stroke, vectors->last_stroke_ID);
g_object_ref (stroke);
}
void
gimp_vectors_stroke_remove (GimpVectors *vectors,
GimpStroke *stroke)
{
g_return_if_fail (GIMP_IS_VECTORS (vectors));
g_return_if_fail (GIMP_IS_STROKE (stroke));
gimp_vectors_freeze (vectors);
GIMP_VECTORS_GET_CLASS (vectors)->stroke_remove (vectors, stroke);
gimp_vectors_thaw (vectors);
}
static void
gimp_vectors_real_stroke_remove (GimpVectors *vectors,
GimpStroke *stroke)
{
GList *list;
list = g_list_find (vectors->strokes, stroke);
if (list)
{
vectors->strokes = g_list_delete_link (vectors->strokes, list);
g_object_unref (stroke);
}
}
gint
gimp_vectors_get_n_strokes (const GimpVectors *vectors)
{
g_return_val_if_fail (GIMP_IS_VECTORS (vectors), 0);
return g_list_length (vectors->strokes);
}
GimpStroke *
gimp_vectors_stroke_get (const GimpVectors *vectors,
const GimpCoords *coord)
{
g_return_val_if_fail (GIMP_IS_VECTORS (vectors), NULL);
return GIMP_VECTORS_GET_CLASS (vectors)->stroke_get (vectors, coord);
}
static GimpStroke *
gimp_vectors_real_stroke_get (const GimpVectors *vectors,
const GimpCoords *coord)
{
GList *stroke;
gdouble mindist = G_MAXDOUBLE;
GimpStroke *minstroke = NULL;
for (stroke = vectors->strokes; stroke; stroke = g_list_next (stroke))
{
GimpAnchor *anchor = gimp_stroke_anchor_get (stroke->data, coord);
if (anchor)
{
gdouble dx, dy;
dx = coord->x - anchor->position.x;
dy = coord->y - anchor->position.y;
if (mindist > dx * dx + dy * dy)
{
mindist = dx * dx + dy * dy;
minstroke = GIMP_STROKE (stroke->data);
}
}
}
return minstroke;
}
GimpStroke *
gimp_vectors_stroke_get_by_ID (const GimpVectors *vectors,
gint id)
{
GList *stroke;
g_return_val_if_fail (GIMP_IS_VECTORS (vectors), NULL);
for (stroke = vectors->strokes; stroke; stroke = g_list_next (stroke))
{
if (gimp_stroke_get_ID (stroke->data) == id)
return stroke->data;
}
return NULL;
}
GimpStroke *
gimp_vectors_stroke_get_next (const GimpVectors *vectors,
const GimpStroke *prev)
{
g_return_val_if_fail (GIMP_IS_VECTORS (vectors), NULL);
return GIMP_VECTORS_GET_CLASS (vectors)->stroke_get_next (vectors, prev);
}
static GimpStroke *
gimp_vectors_real_stroke_get_next (const GimpVectors *vectors,
const GimpStroke *prev)
{
if (! prev)
{
return vectors->strokes ? vectors->strokes->data : NULL;
}
else
{
GList *stroke;
stroke = g_list_find (vectors->strokes, prev);
g_return_val_if_fail (stroke != NULL, NULL);
return stroke->next ? GIMP_STROKE (stroke->next->data) : NULL;
}
}
gdouble
gimp_vectors_stroke_get_length (const GimpVectors *vectors,
const GimpStroke *stroke)
{
g_return_val_if_fail (GIMP_IS_VECTORS (vectors), 0.0);
g_return_val_if_fail (GIMP_IS_STROKE (stroke), 0.0);
return GIMP_VECTORS_GET_CLASS (vectors)->stroke_get_length (vectors, stroke);
}
static gdouble
gimp_vectors_real_stroke_get_length (const GimpVectors *vectors,
const GimpStroke *stroke)
{
g_return_val_if_fail (GIMP_IS_VECTORS (vectors), 0.0);
g_return_val_if_fail (GIMP_IS_STROKE (stroke), 0.0);
return (gimp_stroke_get_length (stroke, vectors->precision));
return 0.0;
}
GimpAnchor *
gimp_vectors_anchor_get (const GimpVectors *vectors,
const GimpCoords *coord,
GimpStroke **ret_stroke)
{
g_return_val_if_fail (GIMP_IS_VECTORS (vectors), NULL);
return GIMP_VECTORS_GET_CLASS (vectors)->anchor_get (vectors, coord,
ret_stroke);
}
static GimpAnchor *
gimp_vectors_real_anchor_get (const GimpVectors *vectors,
const GimpCoords *coord,
GimpStroke **ret_stroke)
{
gdouble dx, dy, mindist;
GList *stroke;
GimpAnchor *anchor = NULL;
GimpAnchor *minanchor = NULL;
mindist = -1;
for (stroke = vectors->strokes; stroke; stroke = g_list_next (stroke))
{
anchor = gimp_stroke_anchor_get (GIMP_STROKE (stroke->data), coord);
if (anchor)
{
dx = coord->x - anchor->position.x;
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->data;
}
}
}
return minanchor;
}
void
gimp_vectors_anchor_delete (GimpVectors *vectors,
GimpAnchor *anchor)
{
g_return_if_fail (GIMP_IS_VECTORS (vectors));
g_return_if_fail (anchor != NULL);
GIMP_VECTORS_GET_CLASS (vectors)->anchor_delete (vectors, anchor);
}
static void
gimp_vectors_real_anchor_delete (GimpVectors *vectors,
GimpAnchor *anchor)
{
}
void
gimp_vectors_anchor_select (GimpVectors *vectors,
GimpStroke *target_stroke,
GimpAnchor *anchor,
gboolean selected,
gboolean exclusive)
{
GList *stroke_list;
GimpStroke *stroke;
for (stroke_list = vectors->strokes; stroke_list;
stroke_list = g_list_next (stroke_list))
{
stroke = GIMP_STROKE (stroke_list->data);
gimp_stroke_anchor_select (stroke,
stroke == target_stroke ? anchor : NULL,
selected, exclusive);
}
}
gdouble
gimp_vectors_get_length (const GimpVectors *vectors,
const GimpAnchor *start)
{
g_return_val_if_fail (GIMP_IS_VECTORS (vectors), 0.0);
return GIMP_VECTORS_GET_CLASS (vectors)->get_length (vectors, start);
}
static gdouble
gimp_vectors_real_get_length (const GimpVectors *vectors,
const GimpAnchor *start)
{
g_printerr ("gimp_vectors_get_length: default implementation\n");
return 0;
}
gdouble
gimp_vectors_get_distance (const GimpVectors *vectors,
const GimpCoords *coord)
{
g_return_val_if_fail (GIMP_IS_VECTORS (vectors), 0.0);
return GIMP_VECTORS_GET_CLASS (vectors)->get_distance (vectors, coord);
}
static gdouble
gimp_vectors_real_get_distance (const GimpVectors *vectors,
const GimpCoords *coord)
{
g_printerr ("gimp_vectors_get_distance: default implementation\n");
return 0;
}
gboolean
gimp_vectors_bounds (const GimpVectors *vectors,
gdouble *x1,
gdouble *y1,
gdouble *x2,
gdouble *y2)
{
GArray *stroke_coords;
GimpStroke *cur_stroke;
gint i;
gboolean has_strokes = FALSE;
gboolean closed;
GimpCoords point;
g_return_val_if_fail (GIMP_IS_VECTORS (vectors), FALSE);
g_return_val_if_fail (x1 != NULL, FALSE);
g_return_val_if_fail (y1 != NULL, FALSE);
g_return_val_if_fail (x2 != NULL, FALSE);
g_return_val_if_fail (y2 != NULL, FALSE);
for (cur_stroke = gimp_vectors_stroke_get_next (vectors, NULL);
cur_stroke;
cur_stroke = gimp_vectors_stroke_get_next (vectors, cur_stroke))
{
stroke_coords = gimp_stroke_interpolate (cur_stroke, 1.0, &closed);
if (stroke_coords)
{
if (! has_strokes && stroke_coords->len > 0)
{
has_strokes = TRUE;
point = g_array_index (stroke_coords, GimpCoords, 0);
*x1 = *x2 = point.x;
*y1 = *y2 = point.y;
}
for (i=0; i < stroke_coords->len; i++)
{
point = g_array_index (stroke_coords, GimpCoords, i);
*x1 = MIN (*x1, point.x);
*y1 = MIN (*y1, point.y);
*x2 = MAX (*x2, point.x);
*y2 = MAX (*y2, point.y);
}
g_array_free (stroke_coords, TRUE);
}
}
return has_strokes;
}
gint
gimp_vectors_interpolate (const GimpVectors *vectors,
const GimpStroke *stroke,
gdouble precision,
gint max_points,
GimpCoords *ret_coords)
{
g_return_val_if_fail (GIMP_IS_VECTORS (vectors), 0);
return GIMP_VECTORS_GET_CLASS (vectors)->interpolate (vectors, stroke,
precision, max_points,
ret_coords);
}
static gint
gimp_vectors_real_interpolate (const GimpVectors *vectors,
const GimpStroke *stroke,
gdouble precision,
gint max_points,
GimpCoords *ret_coords)
{
g_printerr ("gimp_vectors_interpolate: default implementation\n");
return 0;
}
GimpBezierDesc *
gimp_vectors_make_bezier (const GimpVectors *vectors)
{
g_return_val_if_fail (GIMP_IS_VECTORS (vectors), NULL);
return GIMP_VECTORS_GET_CLASS (vectors)->make_bezier (vectors);
}
static GimpBezierDesc *
gimp_vectors_real_make_bezier (const GimpVectors *vectors)
{
GimpStroke *cur_stroke;
GArray *cmd_array;
GimpBezierDesc *bezdesc;
GimpBezierDesc *ret_bezdesc = NULL;
cmd_array = g_array_new (FALSE, FALSE, sizeof (cairo_path_data_t));
for (cur_stroke = gimp_vectors_stroke_get_next (vectors, NULL);
cur_stroke;
cur_stroke = gimp_vectors_stroke_get_next (vectors, cur_stroke))
{
bezdesc = gimp_stroke_make_bezier (cur_stroke);
if (bezdesc)
{
cmd_array = g_array_append_vals (cmd_array, bezdesc->data,
bezdesc->num_data);
g_free (bezdesc->data);
g_free (bezdesc);
}
}
if (cmd_array->len > 0)
{
ret_bezdesc = g_new (GimpBezierDesc, 1);
ret_bezdesc->status = CAIRO_STATUS_SUCCESS;
ret_bezdesc->num_data = cmd_array->len;
ret_bezdesc->data = (cairo_path_data_t *) cmd_array->data;
g_array_free (cmd_array, FALSE);
}
return ret_bezdesc;
}
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