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Gimp/app/path/gimpvectorlayer.c
Jehan ada86282de app: reimplement saving/loading of vector layers and bump to XCF 24. 
We now have a proper PROP_VECTOR_LAYER property in the XCF which will
store the various data relevant to vector layers.
This also fixes saving this new type of layers at all, since it was
broken in MR !773.
2025-08-16 23:44:09 -04:00

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpvectorlayer.c
*
* Copyright 2006 Hendrik Boom
*
* 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 <stdio.h>
#include <cairo.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "libgimpcolor/gimpcolor.h"
#include "libgimpconfig/gimpconfig.h"
#include "libgimpmath/gimpmath.h"
#include "path-types.h"
#include "core/gimp.h"
#include "core/gimpdrawable-fill.h"
#include "core/gimpdrawable-stroke.h"
#include "core/gimpimage.h"
#include "core/gimpselection.h"
#include "core/gimpimage-undo.h"
#include "core/gimpimage-undo-push.h"
#include "core/gimpstrokeoptions.h"
#include "core/gimpparasitelist.h"
#include "gimpvectorlayer.h"
#include "gimpvectorlayeroptions.h"
#include "gimppath.h"
#include "gimp-intl.h"
enum
{
PROP_0,
PROP_VECTOR_LAYER_OPTIONS,
PROP_MODIFIED
};
/* local function declarations */
static void gimp_vector_layer_finalize (GObject *object);
static void gimp_vector_layer_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_vector_layer_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_vector_layer_set_vector_options
(GimpVectorLayer *layer,
GimpVectorLayerOptions *options);
static void gimp_vector_layer_set_buffer (GimpDrawable *drawable,
gboolean push_undo,
const gchar *undo_desc,
GeglBuffer *buffer,
const GeglRectangle *bounds);
static void gimp_vector_layer_push_undo (GimpDrawable *drawable,
const gchar *undo_desc,
GeglBuffer *buffer,
gint x,
gint y,
gint width,
gint height);
static gint64 gimp_vector_layer_get_memsize (GimpObject *object,
gint64 *gui_size);
static GimpItem * gimp_vector_layer_duplicate (GimpItem *item,
GType new_type);
static void gimp_vector_layer_translate (GimpLayer *layer,
gint offset_x,
gint offset_y);
static void gimp_vector_layer_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_vector_layer_flip (GimpItem *item,
GimpContext *context,
GimpOrientationType flip_type,
gdouble axis,
gboolean clip_result);
static void gimp_vector_layer_rotate (GimpItem *item,
GimpContext *context,
GimpRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result);
static void gimp_vector_layer_transform (GimpItem *item,
GimpContext *context,
const GimpMatrix3 *matrix,
GimpTransformDirection direction,
GimpInterpolationType interp_type,
GimpTransformResize clip_result,
GimpProgress *progress);
static gboolean gimp_vector_layer_render (GimpVectorLayer *layer);
static void gimp_vector_layer_render_path (GimpVectorLayer *layer);
static void gimp_vector_layer_changed_options (GimpVectorLayer *layer);
static void gimp_vector_layer_removed (GimpItem *item);
static void gimp_vector_layer_removed_options_path
(GimpVectorLayer *layer);
G_DEFINE_TYPE (GimpVectorLayer, gimp_vector_layer, GIMP_TYPE_LAYER)
#define parent_class gimp_vector_layer_parent_class
static void
gimp_vector_layer_class_init (GimpVectorLayerClass *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);
GimpDrawableClass *drawable_class = GIMP_DRAWABLE_CLASS (klass);
GimpLayerClass *layer_class = GIMP_LAYER_CLASS (klass);
drawable_class->set_buffer = gimp_vector_layer_set_buffer;
drawable_class->push_undo = gimp_vector_layer_push_undo;
object_class->finalize = gimp_vector_layer_finalize;
object_class->set_property = gimp_vector_layer_set_property;
object_class->get_property = gimp_vector_layer_get_property;
gimp_object_class->get_memsize = gimp_vector_layer_get_memsize;
viewable_class->default_icon_name = "gimp-vector-layer";
viewable_class->default_name = _("Vector Layer");
layer_class->translate = gimp_vector_layer_translate;
item_class->removed = gimp_vector_layer_removed;
item_class->duplicate = gimp_vector_layer_duplicate;
item_class->scale = gimp_vector_layer_scale;
item_class->flip = gimp_vector_layer_flip;
item_class->rotate = gimp_vector_layer_rotate;
item_class->transform = gimp_vector_layer_transform;
item_class->rename_desc = _("Rename Vector Layer");
item_class->translate_desc = _("Move Vector Layer");
item_class->scale_desc = _("Scale Vector Layer");
item_class->resize_desc = _("Resize Vector Layer");
item_class->flip_desc = _("Flip Vector Layer");
item_class->rotate_desc = _("Rotate Vector Layer");
item_class->transform_desc = _("Transform Vector Layer");
GIMP_CONFIG_PROP_OBJECT (object_class, PROP_VECTOR_LAYER_OPTIONS,
"vector-layer-options", NULL, NULL,
GIMP_TYPE_VECTOR_LAYER_OPTIONS,
G_PARAM_STATIC_STRINGS | G_PARAM_EXPLICIT_NOTIFY);
GIMP_CONFIG_PROP_BOOLEAN (object_class, PROP_MODIFIED,
"modified",
NULL, NULL,
FALSE,
GIMP_PARAM_STATIC_STRINGS);
}
static void
gimp_vector_layer_init (GimpVectorLayer *layer)
{
layer->options = NULL;
layer->modified = FALSE;
}
static void
gimp_vector_layer_finalize (GObject *object)
{
GimpVectorLayer *layer = GIMP_VECTOR_LAYER (object);
if (layer->options)
{
g_object_unref (layer->options);
layer->options = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_vector_layer_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpVectorLayer *vector_layer = GIMP_VECTOR_LAYER (object);
switch (property_id)
{
case PROP_VECTOR_LAYER_OPTIONS:
g_value_set_object (value, vector_layer->options);
break;
case PROP_MODIFIED:
g_value_set_boolean (value, vector_layer->modified);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_vector_layer_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpVectorLayer *vector_layer = GIMP_VECTOR_LAYER (object);
switch (property_id)
{
case PROP_VECTOR_LAYER_OPTIONS:
gimp_vector_layer_set_vector_options (vector_layer, g_value_get_object (value));
break;
case PROP_MODIFIED:
vector_layer->modified = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_vector_layer_set_vector_options (GimpVectorLayer *layer,
GimpVectorLayerOptions *options)
{
if (layer->options)
{
g_signal_handlers_disconnect_by_func (layer->options,
G_CALLBACK (gimp_vector_layer_changed_options),
layer);
if (layer->options->path)
g_signal_handlers_disconnect_by_func (layer->options->path,
G_CALLBACK (gimp_vector_layer_removed_options_path),
layer);
g_object_unref (layer->options);
}
g_set_object (&layer->options, options);
gimp_vector_layer_changed_options (layer);
if (layer->options)
{
if (layer->options->path)
g_signal_connect_object (layer->options->path, "removed",
G_CALLBACK (gimp_vector_layer_removed_options_path),
layer, G_CONNECT_SWAPPED);
g_signal_connect_object (layer->options, "notify",
G_CALLBACK (gimp_vector_layer_changed_options),
layer, G_CONNECT_SWAPPED);
}
g_object_notify (G_OBJECT (layer), "vector-layer-options");
}
static void
gimp_vector_layer_set_buffer (GimpDrawable *drawable,
gboolean push_undo,
const gchar *undo_desc,
GeglBuffer *buffer,
const GeglRectangle *bounds)
{
GimpVectorLayer *layer = GIMP_VECTOR_LAYER (drawable);
GimpImage *image = gimp_item_get_image (GIMP_ITEM (layer));
if (push_undo && ! layer->modified)
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_DRAWABLE_MOD,
undo_desc);
GIMP_DRAWABLE_CLASS (parent_class)->set_buffer (drawable,
push_undo, undo_desc,
buffer, bounds);
if (push_undo && ! layer->modified)
{
gimp_image_undo_push_vector_layer_modified (image, NULL, layer);
g_object_set (drawable, "modified", TRUE, NULL);
gimp_image_undo_group_end (image);
}
}
static void
gimp_vector_layer_push_undo (GimpDrawable *drawable,
const gchar *undo_desc,
GeglBuffer *buffer,
gint x,
gint y,
gint width,
gint height)
{
GimpVectorLayer *layer = GIMP_VECTOR_LAYER (drawable);
GimpImage *image = gimp_item_get_image (GIMP_ITEM (layer));
if (! layer->modified)
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_DRAWABLE, undo_desc);
GIMP_DRAWABLE_CLASS (parent_class)->push_undo (drawable, undo_desc,
buffer,
x, y, width, height);
if (! layer->modified)
{
gimp_image_undo_push_vector_layer_modified (image, NULL, layer);
g_object_set (drawable, "modified", TRUE, NULL);
gimp_image_undo_group_end (image);
}
}
static gint64
gimp_vector_layer_get_memsize (GimpObject *object,
gint64 *gui_size)
{
GimpVectorLayer *vector_layer = GIMP_VECTOR_LAYER (object);
gint64 memsize = 0;
memsize += gimp_object_get_memsize (GIMP_OBJECT (vector_layer->options),
gui_size);
return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
static GimpItem *
gimp_vector_layer_duplicate (GimpItem *item,
GType new_type)
{
GimpItem *new_item;
g_return_val_if_fail (g_type_is_a (new_type, GIMP_TYPE_DRAWABLE), NULL);
new_item = GIMP_ITEM_CLASS (parent_class)->duplicate (item, new_type);
if (GIMP_IS_VECTOR_LAYER (new_item))
{
GimpVectorLayer *vector_layer = GIMP_VECTOR_LAYER (item);
GimpVectorLayer *new_vector_layer = GIMP_VECTOR_LAYER (new_item);
if (vector_layer->options)
{
GimpVectorLayerOptions *new_options =
gimp_config_duplicate (GIMP_CONFIG (vector_layer->options));
if (vector_layer->options->path)
{
GimpPath *path = gimp_vector_layer_get_path (vector_layer);
GimpPath *new_path;
new_path = GIMP_PATH (gimp_item_duplicate (GIMP_ITEM (path),
G_TYPE_FROM_INSTANCE (GIMP_ITEM (path))));
g_object_set (new_options, "path", new_path, NULL);
}
g_object_set (new_vector_layer,
"vector-layer-options", new_options,
NULL);
g_object_unref (new_options);
}
}
return new_item;
}
static void
gimp_vector_layer_translate (GimpLayer *layer,
gint offset_x,
gint offset_y)
{
GimpVectorLayer *vector_layer = GIMP_VECTOR_LAYER (layer);
if (vector_layer->options && vector_layer->options->path)
{
gimp_item_translate (GIMP_ITEM (vector_layer->options->path),
offset_x, offset_y, FALSE);
}
else
{
GIMP_LAYER_CLASS (parent_class)->translate (layer, offset_x, offset_y);
}
}
static void
gimp_vector_layer_scale (GimpItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
GimpInterpolationType interp_type,
GimpProgress *progress)
{
GimpVectorLayer *vector_layer = GIMP_VECTOR_LAYER (item);
if (vector_layer->options && vector_layer->options->path)
{
gimp_item_scale (GIMP_ITEM (vector_layer->options->path),
new_width, new_height, new_offset_x, new_offset_y,
interp_type, progress);
}
else
{
GIMP_ITEM_CLASS (parent_class)->scale (item, new_width, new_height,
new_offset_x, new_offset_y,
interp_type, progress);
}
}
static void
gimp_vector_layer_flip (GimpItem *item,
GimpContext *context,
GimpOrientationType flip_type,
gdouble axis,
gboolean clip_result)
{
GimpVectorLayer *vector_layer = GIMP_VECTOR_LAYER (item);
if (vector_layer->options && vector_layer->options->path)
{
gimp_item_flip (GIMP_ITEM (vector_layer->options->path),
context, flip_type, axis, clip_result);
}
else
{
GIMP_ITEM_CLASS (parent_class)->flip (item, context, flip_type,
axis, clip_result);
}
}
static void
gimp_vector_layer_rotate (GimpItem *item,
GimpContext *context,
GimpRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result)
{
GimpVectorLayer *vector_layer = GIMP_VECTOR_LAYER (item);
if (vector_layer->options && vector_layer->options->path)
{
gimp_item_rotate (GIMP_ITEM (vector_layer->options->path),
context, rotate_type, center_x, center_y, clip_result);
}
else
{
GIMP_ITEM_CLASS (parent_class)->rotate (item, context, rotate_type,
center_x, center_y, clip_result);
}
}
static void
gimp_vector_layer_transform (GimpItem *item,
GimpContext *context,
const GimpMatrix3 *matrix,
GimpTransformDirection direction,
GimpInterpolationType interp_type,
GimpTransformResize clip_result,
GimpProgress *progress)
{
GimpVectorLayer *vector_layer = GIMP_VECTOR_LAYER (item);
if (vector_layer->options && vector_layer->options->path)
{
gimp_item_transform (GIMP_ITEM (vector_layer->options->path),
context, matrix, direction, interp_type,
clip_result, progress);
}
else
{
GIMP_ITEM_CLASS (parent_class)->transform (item, context, matrix,
direction, interp_type,
clip_result, progress);
}
}
static void
gimp_vector_layer_removed_options_path (GimpVectorLayer *layer)
{
if (layer->options)
{
gimp_image_undo_push_vector_layer (gimp_item_get_image (GIMP_ITEM (layer)),
_("Discard Vector Informations"),
layer, NULL);
g_object_set (layer->options, "path", NULL, NULL);
}
}
static void
gimp_vector_layer_removed (GimpItem *item)
{
GimpVectorLayer *vector_layer = GIMP_VECTOR_LAYER (item);
if (vector_layer->options && vector_layer->options->path)
g_signal_handlers_disconnect_by_func (vector_layer->options->path,
G_CALLBACK (gimp_vector_layer_removed_options_path),
vector_layer);
GIMP_ITEM_CLASS (parent_class)->removed (item);
}
/* public functions */
/**
* gimp_vector_layer_new:
* @image: the #GimpImage the layer should belong to
* @path: the #GimpPath object the layer should render
* @context: the #GimpContext from which to pull context properties
*
* Creates a new vector layer.
*
* Return value: a new #GimpVectorLayer or %NULL in case of a problem
**/
GimpVectorLayer *
gimp_vector_layer_new (GimpImage *image,
GimpPath *path,
GimpContext *context)
{
GimpVectorLayer *layer;
GimpVectorLayerOptions *options;
gint x = 0;
gint y = 0;
gint width = gimp_image_get_width (image);
gint height = gimp_image_get_height (image);
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
g_return_val_if_fail (GIMP_IS_PATH (path), NULL);
g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
options = gimp_vector_layer_options_new (image, path, context);
gimp_item_bounds (GIMP_ITEM (path), &x, &y, &width, &height);
/* Set boundaries to image size if it's a blank path */
if (width == 0 || height == 0)
{
width = gimp_image_get_width (image);
height = gimp_image_get_height (image);
}
layer =
GIMP_VECTOR_LAYER (gimp_drawable_new (GIMP_TYPE_VECTOR_LAYER,
image, NULL,
x, y, width, height,
gimp_image_get_layer_format (image,
TRUE)));
gimp_object_set_name (GIMP_OBJECT (layer),
gimp_object_get_name (GIMP_OBJECT (path)));
gimp_layer_set_mode (GIMP_LAYER (layer),
gimp_image_get_default_new_layer_mode (image),
FALSE);
gimp_vector_layer_set_vector_options (layer, options);
g_object_unref (options);
return layer;
}
/**
* gimp_vector_layer_get_path:
* @layer: a #GimpVectorLayer
*
* Gets the path from @layer if one is associated with it.
*
* Return value: a #GimpPath or %NULL if no path is set.
*/
GimpPath *
gimp_vector_layer_get_path (GimpVectorLayer *layer)
{
g_return_val_if_fail (GIMP_IS_VECTOR_LAYER (layer), NULL);
if (gimp_item_is_vector_layer (GIMP_ITEM (layer)))
return layer->options->path;
return NULL;
}
void
gimp_vector_layer_refresh (GimpVectorLayer *layer)
{
if (layer->options)
gimp_vector_layer_render (layer);
}
/**
* gimp_vector_layer_discard:
* @layer: a #GimpVectorLayer
*
* Discards the vector information. This makes @layer behave like a
* normal layer.
*/
void
gimp_vector_layer_discard (GimpVectorLayer *layer)
{
g_return_if_fail (GIMP_IS_VECTOR_LAYER (layer));
g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (layer)));
if (! layer->options)
return;
if (layer->options->path)
gimp_image_undo_push_vector_layer (gimp_item_get_image (GIMP_ITEM (layer)),
_("Discard Vector Information"),
layer, NULL);
g_object_set (layer, "vector-layer-options", NULL, NULL);
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (layer));
gimp_image_flush (gimp_item_get_image (GIMP_ITEM (layer)));
}
gboolean
gimp_item_is_vector_layer (GimpItem *item)
{
return (GIMP_IS_VECTOR_LAYER (item) &&
GIMP_VECTOR_LAYER (item)->options);
}
/* private functions */
static gboolean
gimp_vector_layer_render (GimpVectorLayer *layer)
{
GimpDrawable *drawable = GIMP_DRAWABLE (layer);
GeglBuffer *buffer = NULL;
GimpItem *item = GIMP_ITEM (layer);
GimpImage *image = gimp_item_get_image (item);
gint layer_x = 0;
gint layer_y = 0;
gint x = 0;
gint y = 0;
gint width = gimp_image_get_width (image);
gint height = gimp_image_get_height (image);
gdouble stroke = 0;
g_return_val_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)), FALSE);
g_object_freeze_notify (G_OBJECT (drawable));
if (layer->options->enable_stroke)
stroke = gimp_stroke_options_get_width (layer->options->stroke_options);
/* Resize layer according to path size */
gimp_item_get_offset (GIMP_ITEM (layer), &layer_x, &layer_y);
gimp_item_bounds (GIMP_ITEM (layer->options->path), &x, &y, &width, &height);
buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0,
(gint) ceil (width + stroke),
(gint) ceil (height + stroke)),
gimp_drawable_get_format (drawable));
gimp_drawable_set_buffer (drawable, FALSE, NULL, buffer);
g_object_unref (buffer);
gimp_item_set_offset (GIMP_ITEM (layer), x - (stroke / 2), y - (stroke / 2));
/* make the layer background transparent */
gimp_drawable_fill (GIMP_DRAWABLE (layer),
gimp_get_user_context (image->gimp),
GIMP_FILL_TRANSPARENT);
/* render path to the layer */
gimp_vector_layer_render_path (layer);
g_object_thaw_notify (G_OBJECT (drawable));
return TRUE;
}
static void
gimp_vector_layer_render_path (GimpVectorLayer *layer)
{
GimpImage *image = gimp_item_get_image (GIMP_ITEM (layer));
GimpVectorLayerOptions *options = layer->options;
GimpPath *path = NULL;
GimpChannel *selection = gimp_image_get_mask (image);
GList *drawables;
GimpCustomStyle style;
if (options)
path = options->path;
/* Don't mask these fill/stroke operations */
gimp_selection_suspend (GIMP_SELECTION (selection));
/* Convert from custom to standard styles */
style = gimp_fill_options_get_custom_style (options->fill_options);
if (style == GIMP_CUSTOM_STYLE_SOLID_COLOR ||
! gimp_context_get_pattern (GIMP_CONTEXT (options->fill_options)))
gimp_fill_options_set_style (options->fill_options,
GIMP_FILL_STYLE_FG_COLOR);
else
gimp_fill_options_set_style (options->fill_options,
GIMP_FILL_STYLE_PATTERN);
style =
gimp_fill_options_get_custom_style (GIMP_FILL_OPTIONS (options->stroke_options));
if (style == GIMP_CUSTOM_STYLE_SOLID_COLOR ||
! gimp_context_get_pattern (GIMP_CONTEXT (options->stroke_options)))
gimp_fill_options_set_style (GIMP_FILL_OPTIONS (options->stroke_options),
GIMP_FILL_STYLE_FG_COLOR);
else
gimp_fill_options_set_style (GIMP_FILL_OPTIONS (options->stroke_options),
GIMP_FILL_STYLE_PATTERN);
/* Fill the path object onto the layer */
if (options->enable_fill)
gimp_drawable_fill_path (GIMP_DRAWABLE (layer),
options->fill_options,
path, FALSE, NULL);
drawables = g_list_prepend (NULL, GIMP_DRAWABLE (layer));
/* stroke the path object onto the layer */
if (options->enable_stroke && gimp_item_is_attached (GIMP_ITEM (path)))
gimp_item_stroke (GIMP_ITEM (path), drawables,
gimp_get_user_context (image->gimp),
options->stroke_options,
FALSE, FALSE,
NULL, NULL);
g_list_free (drawables);
gimp_selection_resume (GIMP_SELECTION (selection));
}
static void
gimp_vector_layer_changed_options (GimpVectorLayer *layer)
{
GimpItem *item = GIMP_ITEM (layer);
if (layer->options && !layer->options->path)
gimp_vector_layer_discard (layer);
else if (gimp_item_is_attached (item))
gimp_vector_layer_refresh (layer);
}
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