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Gimp/app/path/gimpvectorlayer.c
Jehan 2821dbab58 app: add generic support for less destructive transform tools. 
This commit will make all transform tools run on a link layer cumulate
their transform matrix on top of the previous transform steps. It means
that as long as you don't edit the pixels another way (e.g. with a paint
tool), all your transformations will apply as a single transformation.

For instance it means that applying several transform tool steps on a
monitored link layer will be less destructive than applying the exact
same transformations on the exact same "normal" layer contents.
Even scaling an image to 1x1 then back to a big size will work very
fine!

Note nevertheless the following limitations in current implementation:

* The link layer with transformations will still show as a standard link
  layer. Nothing says it has transformation applied on it right now.
* To drop transformations applied on a link layer, you have to discard
  the link info, then monitor the link again. A specific action in the
  contextual menu could be worth it.
* This should work with all transform tools (scale, rotation, unified,
  perspective, 3D, even Warp…) but it won't work for the Flip tool, nor
  will it work for the Transform actions. I will need to implement
  GimpItem's rotate(), flip() and resize() methods next.
* The layer mask would still be destructively transformed (I have not
  made any tests with layer masks yet, but this should be done next
  too).
* I think that the "scaled-only" property is now meaningless. It is now
  being replaced by the presence of the GimpMatrix3. Nevertheless I have
  still not removed this property.
* The load/save code has not been redone yet to include all these
  changes.

The kind of caveats we'd have to know about (and which are not planned
for change, because it's just how it is):

* Any intermediate interpolation methods are dropped when cumulating
  transform steps. Only the last interpolation is stored. This is
  because anyway the interpolation is only there as the best algorithm
  where we visually see the less quality loss. Applying several
  transformations as a single matrix will always be visually better than
  applying several matrices (whatever the intermediate interpolation
  methods chosen).
* This only works with the "Adjust" clipping method (basically no
  clipping) because 2 transform steps with clipping won't produce the
  same result as the multiplied matrix with clipping. It means that
  applying a transform with clipping will downgrade your link layer to
  being a normal layer.
  The only issue I have with this is how to best convey that clipping is
  a major setting setting here, which disables our less-destructive
  abilities. Right now, people will just have to "know" it.
* Vector link layers in particular will have 2 levels of
  non/less-destructivity transforms. In particular any scaling (both
  through "Scale Image", "Scale Layers" and transform tools — since I
  added code to detect a matrix doing only scaling and optionally
  translation) done **first** will be completely non-destructive since
  we will simply reload the original vector source at the right
  dimensions. Any other kind of transforms will be appended through the
  cumulative matrix, as raster link layers. This also includes scaling
  done **after** other transforms, since we cannot easily move the
  scaling first (matrix multiplication is not commutative). This second
  level of scaling will therefore be *less* destructive, but still
  destructive.
  It is possible eventually to improve the whole thing if we add some
  day the ability to request loading a vector image with a transform
  matrix (it will then be up to each vector format plug-in to support
  this feature or not).

Note: it could be argued that this whole implementation could in fact be
moved over to base layers, since it would allow also less-destructivity
when applying multiple transformations in a row. We would only merge
results once we edit pixels more directly.
But I think that it's not a bad idea to experiment with this new code in
the link layer. Eventually I may likely move this to the parent
GimpLayer if no blocking issues are found.
2025-08-27 11:34:04 +02:00

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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,
gboolean push_undo);
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);
layer->options = NULL;
}
if (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,
gboolean push_undo)
{
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, push_undo);
}
}
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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