# PIKA - Photo and Image Kooker Application
# Copyright (C) 1995 Spencer Kimball and Peter Mattis

# 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/>.

# "Perlized" from C source by Manish Singh <yosh@gimp.org>

sub image_add_sample_point {
    $blurb = 'Add a sample point to an image.';

    $help = <<HELP;
This procedure adds a sample point to an image. It takes the input
image and the position of the new sample points as parameters. It
returns the sample point ID of the new sample point.
HELP

    &mitch_pdb_misc('2016', '2.10');

    @inargs = (
	{ name => 'image', type => 'image',
	  desc => 'The image' },
	{ name => 'position_x', type => '0 <= int32',
	  desc => "The sample point's x-offset from left of image" },
	{ name => 'position_y', type => '0 <= int32',
	  desc => "The sample point's y-offset from top of image" }
    );

    @outargs = (
	{ name => 'sample_point', type => 'sample_point',
	  desc => 'The new sample point' }
    );

    %invoke = (
	code => <<'CODE'
{
  if (position_x <= pika_image_get_width  (image) &&
      position_y <= pika_image_get_height (image))
    {
      PikaSamplePoint *sp;

      sp = pika_image_add_sample_point_at_pos (image, position_x, position_y,
                                               TRUE);
      sample_point = pika_aux_item_get_id (PIKA_AUX_ITEM (sp));
    }
  else
    success = FALSE;
}
CODE
    );
}

sub image_delete_sample_point {
    $blurb = 'Deletes a sample point from an image.';

    $help = <<'HELP';
This procedure takes an image and a sample point ID as input and
removes the specified sample point from the specified image.
HELP

    &mitch_pdb_misc('2016', '2.10');

    @inargs = (
	{ name => 'image', type => 'image',
	  desc => 'The image' },
	{ name => 'sample_point', type => 'sample_point',
	  desc => 'The ID of the sample point to be removed' }
    );

    %invoke = (
	code => <<'CODE'
{
  PikaSamplePoint *sp = pika_pdb_image_get_sample_point (image, sample_point,
                                                         error);

  if (sp)
    pika_image_remove_sample_point (image, sp, TRUE);
  else
    success = FALSE;
}
CODE
    );
}

sub image_find_next_sample_point {
    $blurb = 'Find next sample point on an image.';

    $help = <<'HELP';
This procedure takes an image and a sample point ID as input and finds
the sample point ID of the successor of the given sample point ID in
the image's sample point list. If the supplied sample point ID is 0,
the procedure will return the first sample point. The procedure will
return 0 if given the final sample point ID as an argument or the
image has no sample points.
HELP

    &mitch_pdb_misc('2016', '2.10');

    @inargs = (
	{ name => 'image', type => 'image',
	  desc => 'The image' },
	{ name => 'sample_point', type => 'sample_point', no_validate => 1,
	  desc => 'The ID of the current sample point (0 if first invocation)' }
    );

    @outargs = (
	{ name => 'next_sample_point', type => 'sample_point',
	  desc => "The next sample point's ID" }
    );

    %invoke = (
	code => <<'CODE'
{
  PikaSamplePoint *sp = pika_image_get_next_sample_point (image, sample_point,
                                                          &success);

  if (sp)
    next_sample_point = pika_aux_item_get_id (PIKA_AUX_ITEM (sp));

  if (! success)
    g_set_error (error, PIKA_PDB_ERROR, PIKA_PDB_ERROR_INVALID_ARGUMENT,
                 _("Image '%s' (%d) does not contain sample point with ID %d"),
                 pika_image_get_display_name (image),
                 pika_image_get_id (image),
                 sample_point);
}
CODE
    );
}

sub image_get_sample_point_position {
    $blurb = 'Get position of a sample point on an image.';

    $help = <<'HELP';
This procedure takes an image and a sample point ID as input and
returns the position of the sample point relative to the top and left
of the image.
HELP

    &mitch_pdb_misc('2016', '2.10');

    @inargs = (
	{ name => 'image', type => 'image',
	  desc => 'The image' },
	{ name => 'sample_point', type => 'sample_point',
	  desc => 'The guide' }
    );

    @outargs = (
	{ name => 'position_x', type => 'int32',
          libdef => 'G_MININT',
	  desc => "The sample point's x-offset relative to left of image" },
	{ name => 'position_y', type => 'int32',
          libdef => 'G_MININT',
	  desc => "The sample point's y-offset relative to top of image" }
    );

    %invoke = (
	code => <<'CODE'
{
  PikaSamplePoint *sp = pika_pdb_image_get_sample_point (image, sample_point,
                                                         error);

  if (sp)
    pika_sample_point_get_position (sp, &position_x, &position_y);
  else
    success = FALSE;
}
CODE
    );
}


@headers = qw("core/pikasamplepoint.h"
              "core/pikaimage-sample-points.h"
              "pikapdb-utils.h"
              "pikapdberror.h"
              "pika-intl.h");

@procs = qw(image_add_sample_point
            image_delete_sample_point
            image_find_next_sample_point
	    image_get_sample_point_position);

%exports = (app => [@procs], lib => [@procs]);

$desc = 'Image Sample Point procedures';
$doc_title = 'pikaimagesamplepoints';
$doc_short_desc = 'Functions for manipulating an image\'s sample points.';
$doc_long_desc = 'Functions for manipulating an image\'s sample points.';

1;