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# GIMP - The GNU Image Manipulation Program
# Copyright (C) 1995 Spencer Kimball and Peter Mattis
# New Link Layer PDB API
# Copyright (C) 2025 Jehan
# 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/>.
sub link_layer_new {
$blurb = 'Create a new link layer.';
$help = <<'HELP';
This procedure creates a link layer monitoring the specified @file.
The new layer still needs to be added to the image as this is not
automatic. Add the new layer with the [method@Image.insert_layer]
method.
The arguments are kept as simple as necessary for the basic case. All
link attributes, however, can be modified with the appropriate
`gimp_link_layer_set_*()` procedures.
HELP
&jehan_pdb_misc('2025', '3.2');
@inargs = (
{ name => 'image', type => 'image',
desc => 'The image' },
{ name => 'file', type => 'file',
desc => 'The file this link layer will monitor' }
);
@outargs = (
{ name => 'layer', type => 'link_layer',
desc => 'The new link layer. The object belongs to libgimp and you should not free it.' }
);
%invoke = (
code => <<'CODE'
{
if (file == NULL)
{
g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT,
_("Failed to create link layer"));
success = FALSE;
}
if (success)
{
GimpLink *link;
link = gimp_link_new (gimp, file, 0, 0, TRUE, NULL, error);
if (link == NULL)
{
success = FALSE;
}
else
{
layer = GIMP_LINK_LAYER (gimp_link_layer_new (image, link));
if (! layer)
{
g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT,
_("Failed to create link layer"));
success = FALSE;
}
}
g_clear_object (&link);
}
}
CODE
);
}
sub link_layer_get_file {
$blurb = 'Get the monitored file.';
$help = <<'HELP';
This procedure returns the file which is being monitored.
HELP
&jehan_pdb_misc('2025', '3.2');
@inargs = (
{ name => 'layer', type => 'link_layer',
desc => 'The link layer' }
);
@outargs = (
{ name => 'file', type => 'file',
desc => 'The monitored file' }
);
%invoke = (
code => <<'CODE'
{
file = g_object_ref (gimp_link_get_file (gimp_link_layer_get_link (layer), NULL, NULL));
}
CODE
);
}
sub link_layer_set_file {
$blurb = 'Set the monitored file.';
$help = <<'HELP';
This procedure sets the file to be monitored.
It may change the layer's render.
HELP
&jehan_pdb_misc('2025', '3.2');
@inargs = (
{ name => 'layer', type => 'link_layer',
desc => 'The link layer' },
{ name => 'file', type => 'file',
desc => 'The file to monitor' }
);
%invoke = (
code => <<'CODE'
{
GimpLink *link = gimp_link_new (gimp, file, 0, 0, TRUE, NULL, error);
if (link)
{
gimp_link_layer_set_link (layer, link, TRUE);
}
else
{
success = FALSE;
}
g_clear_object (&link);
}
CODE
);
}
sub link_layer_get_mime_type {
$blurb = 'Get the mime type of the monitored file.';
$help = <<'HELP';
This procedure returns the mime type of the file which is being monitored by @layer.
Note that this will be the real mime type, corresponding to our format support,
as returned by the [class@Gimp.LoadProcedure] which actually performs the external
image file import.
This function may also return %NULL in case of error (for instance if the external
file doesn't exist anymore).
HELP
&jehan_pdb_misc('2025', '3.2');
@inargs = (
{ name => 'layer', type => 'link_layer',
desc => 'The link layer' }
);
@outargs = (
{ name => 'mimetype', type => 'string',
desc => 'The mime type of the monitored file' }
);
%invoke = (
code => <<'CODE'
{
mimetype = g_strdup (gimp_link_get_mime_type (gimp_link_layer_get_link (layer)));
}
CODE
);
}
@headers = qw("core/gimplink.h"
"core/gimplinklayer.h"
"core/gimprasterizable.h"
"gimppdberror.h"
"gimp-intl.h");
@procs = qw(link_layer_new
link_layer_get_file
link_layer_set_file
link_layer_get_mime_type);
%exports = (app => [@procs], lib => [@procs]);
$desc = 'Link layer procedures';
$doc_title = 'gimplinklayer';
$doc_short_desc = 'Functions for querying and manipulating link layers.';
$doc_long_desc = 'Functions for querying and manipulating link layers.';
1;
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