gimp/tools/pdbgen/pdb/context.pdb

# The GIMP -- an image manipulation program
# 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 2 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

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

sub pdb_misc {
   $author = 'Michael Natterer <mitch@gimp.org> & Sven Neumann <sven@gimp.org>';
   $copyright = 'Michael Natterer & Sven Neumann';
   $date = '2004';
   $since = '2.2';
}

sub context_push {
    $blurb = 'Pushes a context to the top of the plug-in\'s context stack.';

    $help = <<'HELP';
This procedure creates a new context by copying the current context. This
copy becomes the new current context for the calling plug-in until it is
popped again.
HELP

    &pdb_misc;

    %invoke = (
	code => <<'CODE'
{
  if (gimp->current_plug_in && gimp->current_plug_in->open)
    {
      success = plug_in_context_push (gimp->current_plug_in);
    }
  else
    {
      success = FALSE;
    }
}
CODE
    );
}

sub context_pop {
    $blurb = 'Pops the topmost context from the plug-in\'s context stack.';

    $help = <<'HELP';
This procedure creates a new context and makes it the current context for the
calling plug-in.
HELP

    &pdb_misc;

    %invoke = (
	code => <<'CODE'
{
  if (gimp->current_plug_in && gimp->current_plug_in->open)
    {
      success = plug_in_context_pop (gimp->current_plug_in);
    }
  else
    {
      success = FALSE;
    }
}
CODE
    );
}

sub context_get_foreground {
    $blurb = "Get the current GIMP foreground color.";

    $help = <<'HELP';
This procedure returns the current GIMP foreground color. The foreground
color is used in a variety of tools such as paint tools, blending, and bucket
fill.
HELP

    &pdb_misc;

    @outargs = (
        { name => 'foreground', type => 'color',
          desc => "The foreground color", alias => 'color',
          void_ret => 1 }
    );

    %invoke = ( code => 'gimp_context_get_foreground (context, &color);' );
}

sub context_set_foreground {
    $blurb = "Set the current GIMP foreground color.";

    $help = <<'HELP';
This procedure sets the current GIMP foreground color. After this is set,
operations which use foreground such as paint tools, blending, and bucket fill
will use the new value.
HELP

    &pdb_misc;

    @inargs = (
        { name => 'foreground', type => 'color',
          desc => "The foreground color", alias => 'color',
          void_ret => 1 }
    );

    %invoke = (
	code => <<CODE
{
  gimp_rgb_set_alpha (&color, 1.0);
  gimp_context_set_foreground (context, &color);
}
CODE
    );
}

sub context_get_background {
    $blurb = "Get the current GIMP background color.";

    $help = <<'HELP';
This procedure returns the current GIMP background color. The background
color is used in a variety of tools such as blending, erasing (with non-alpha
images), and image filling.
HELP

    &pdb_misc;

    @outargs = (
        { name => 'background', type => 'color',
          desc => "The background color", alias => 'color',
          void_ret => 1 }
    );

    %invoke = ( code => 'gimp_context_get_background (context, &color);' );
}

sub context_set_background {
    $blurb = "Set the current GIMP background color.";

    $help = <<'HELP';
This procedure sets the current GIMP background color. After this is set,
operations which use background such as blending, filling images, clearing,
and erasing (in non-alpha images) will use the new value.
HELP

    &pdb_misc;

    @inargs = (
        { name => 'background', type => 'color',
          desc => "The background color", alias => 'color',
          void_ret => 1 }
    );

    %invoke = (
	code => <<CODE
{
  gimp_rgb_set_alpha (&color, 1.0);
  gimp_context_set_background (context, &color);
}
CODE
    );
}

sub context_set_default_colors {
    $blurb = <<'BLURB';
Set the current GIMP foreground and background colors to black and white.
BLURB

    $help = <<'HELP';
This procedure sets the current GIMP foreground and background colors to their
initial default values, black and white.
HELP

    &pdb_misc;

    %invoke = ( code => 'gimp_context_set_default_colors (context);' );
}

sub context_swap_colors {
    $blurb = 'Swap the current GIMP foreground and background colors.';

    $help = <<'HELP';
This procedure swaps the current GIMP foreground and background colors, so that
the new foreground color becomes the old background color and vice versa.
HELP

    &pdb_misc;

    %invoke = ( code => 'gimp_context_swap_colors (context);' );
}

sub context_get_opacity {
    $blurb = 'Get the opacity.';

    $help = <<'HELP';
This procedure returns the opacity setting. The return
value is a floating point number between 0 and 100.
HELP

    &pdb_misc;

    @outargs = (
        { name => 'opacity', type => '0 <= float <= 100',
          desc => 'The opacity: %%desc%%',
          alias => 'gimp_context_get_opacity (context) * 100.0',
          no_declare => 1 }
    );
}

sub context_set_opacity {
    $blurb = 'Set the opacity.';

    $help = <<'HELP';
This procedure modifies the opacity setting. The value
should be a floating point number between 0 and 100.
HELP

    &pdb_misc;

    @inargs = (
        { name => 'opacity', type => '0 <= float <= 100',
          desc => 'The opacity: %%desc%%' }
    );

    %invoke = ( code => 'gimp_context_set_opacity (context, opacity / 100.0);' );
}

sub context_get_paint_mode {
    $blurb = 'Get the paint mode.';

    $help = <<'HELP';
This procedure returns the paint-mode setting. The return value
is an integer which corresponds to the values listed in the argument
description.
HELP

    &pdb_misc;

    @outargs = (
        { name => 'paint_mode', type => 'enum GimpLayerModeEffects',
          desc => 'The paint mode: { %%desc%% }',
          alias => 'gimp_context_get_paint_mode (context)',
          no_declare => 1 }
    );
}

sub context_set_paint_mode {
    $blurb = 'Set the paint mode.';

    $help = <<'HELP';
This procedure modifies the paint_mode setting.
HELP

    &pdb_misc;

    @inargs = (
        { name => 'paint_mode', type => 'enum GimpLayerModeEffects',
          desc => 'The paint mode: { %%desc%% }' }
    );

    %invoke = ( code => 'gimp_context_set_paint_mode (context, paint_mode);' );
}

sub context_get_brush {
    $blurb = 'Retrieve the currently active brush.';

    $help = <<'HELP';
This procedure returns the nme of the currently active brush.
All paint operations and stroke operations use this brush to control
the application of paint to the image.
HELP

    &pdb_misc;

    @outargs = (
	{ name  => 'name', type  => 'string',
	  desc  => 'The name of the active brush',
	  alias => 'g_strdup (gimp_object_get_name (GIMP_OBJECT (brush)))',
	  no_declare => 1 }
    );

    %invoke = (
	vars => [ 'GimpBrush *brush' ],
	code => 'success = (brush = gimp_context_get_brush (context)) != NULL;'
    );
}

sub context_set_brush {
    $blurb = 'Set the specified brush as the active brush.';

    $help = <<'HELP';
This procedure allows the active brush to be set by specifying its name.
The name is simply a string which corresponds to one of the names of the
installed brushes. If there is no matching brush found, this procedure will
return an error.  Otherwise, the specified brush becomes active and will be
used in all subsequent paint operations.
HELP

    &pdb_misc;

    @inargs = (
        { name => 'name', type => 'string',
          desc => 'The name o the brush' }
    );

    %invoke = (
	vars => [ 'GimpBrush *brush' ],
	code => <<'CODE'
{
  brush = (GimpBrush *)
    gimp_container_get_child_by_name (gimp->brush_factory->container, name);

  if (brush)
    gimp_context_set_brush (context, brush);
  else
    success = FALSE;
}
CODE
    );
}

sub context_get_pattern {
    $blurb = 'Retrieve the currently active pattern.';

    $help = <<'HELP';
This procedure returns name of the the currently active pattern.
All clone and bucket-fill operations with patterns will use this
pattern to control the application of paint to the image.
HELP

    &pdb_misc;

    @outargs = (
	{ name  => 'name', type  => 'string',
	  desc  => 'The name of the active pattern',
	  alias => 'g_strdup (gimp_object_get_name (GIMP_OBJECT (pattern)))',
	  no_declare => 1 }
    );

    %invoke = (
	vars => [ 'GimpPattern *pattern' ],
	code => 'success = (pattern = gimp_context_get_pattern (context)) != NULL;'
    );
}

sub context_set_pattern {
    $blurb = 'Set the specified pattern as the active pattern.';

    $help = <<'HELP';
This procedure allows the active pattern to be set by specifying its name.
The name is simply a string which corresponds to one of the names of the
installed patterns. If there is no matching pattern found, this procedure will
return an error. Otherwise, the specified pattern becomes active and will be
used in all subsequent paint operations.
HELP

    &pdb_misc;

    @inargs = (
        { name => 'name', type => 'string',
          desc => 'The name of the pattern' }
    );

    %invoke = (
	vars => [ 'GimpPattern *pattern' ],
	code => <<'CODE'
{
  pattern = (GimpPattern *)
    gimp_container_get_child_by_name (gimp->pattern_factory->container, name);

  if (pattern)
    gimp_context_set_pattern (context, pattern);
  else
    success = FALSE;
}
CODE
    );
}

sub context_get_gradient {
    $blurb = 'Retrieve the currently active gradient.';

    $help = <<'HELP';
This procedure returns the name of the currently active gradient.
HELP

    &pdb_misc;

    @outargs = (
	{ name  => 'name', type  => 'string',
	  desc  => 'The name of the active gradient',
	  alias => 'g_strdup (gimp_object_get_name (GIMP_OBJECT (gradient)))',
	  no_declare => 1 }
    );

    %invoke = (
	vars => [ 'GimpGradient *gradient' ],
	code => 'success = (gradient = gimp_context_get_gradient (context)) != NULL;'
    );
}

sub context_set_gradient {
    $blurb = 'Sets the specified gradient as the active gradient.';

    $help = <<'HELP';
This procedure lets you set the specified gradient as the active or "current"
one. The name is simply a string which corresponds to one of the loaded
gradients. If no matching gradient is found, this
procedure will return an error. Otherwise, the specified gradient will become
active and will be used for subsequent custom gradient operations.
HELP

    &pdb_misc;

    @inargs = (
	{ name => 'name', type => 'string',
	  desc => 'The name of the gradient' }
    );

    %invoke = (
        vars => [ 'GimpGradient *gradient' ],
        code => <<'CODE'
{
  gradient = (GimpGradient *)
    gimp_container_get_child_by_name (gimp->gradient_factory->container, name);

  if (gradient)
    gimp_context_set_gradient (context, gradient);
  else
    success = FALSE;
}
CODE
    );
}

sub context_get_palette {
    $blurb = 'Retrieve the currently active palette.';

    $help = <<'HELP';
This procedure returns the name of the the currently active palette.
HELP

    &pdb_misc;

    @outargs = (
	{ name  => 'name', type  => 'string',
	  desc  => 'The name of the active palette',
	  alias => 'g_strdup (gimp_object_get_name (GIMP_OBJECT (palette)))',
	  no_declare => 1 }
    );

    %invoke = (
        vars => [ 'GimpPalette *palette' ],
        code => 'success = (palette = gimp_context_get_palette (context)) != NULL;'
    );
}

sub context_set_palette {
    $blurb = 'Set the specified palette as the active palette.';

    $help = <<'HELP';
This procedure allows the active palette to be set by specifying its name.
The name is simply a string which corresponds to one of the names of the
installed palettes. If no matching palette is found, this procedure will
return an error. Otherwise, the specified palette becomes active and will be
used in all subsequent palette operations.
HELP

    &pdb_misc;

    @inargs = (
	{ name => 'name', type => 'string',
	  desc => 'The name of the palette' }
    );

    %invoke = (
        vars => [ 'GimpPalette *palette' ],
        code => <<'CODE'
{
  palette = (GimpPalette *)
    gimp_container_get_child_by_name (gimp->palette_factory->container, name);

  if (palette)
    gimp_context_set_palette (context, palette);
  else
    success = FALSE;
}
CODE
    );
}

sub context_get_font {
    $blurb = 'Retrieve the currently active font.';

    $help = <<'HELP';
This procedure returns the name of the currently active font.
HELP

    &pdb_misc;

    @outargs = (
	{ name  => 'name', type  => 'string',
	  desc  => 'The name of the active font',
	  alias => 'g_strdup (gimp_object_get_name (GIMP_OBJECT (font)))',
	  no_declare => 1 }
    );

    %invoke = (
        vars => [ 'GimpFont *font' ],
        code => 'success = (font = gimp_context_get_font (context)) != NULL;'
    );
}

sub context_set_font {
    $blurb = 'Set the specified font as the active font.';

    $help = <<'HELP';
This procedure allows the active font to be set by specifying its name.
The name is simply a string which corresponds to one of the names of the
installed fonts. If no matching font is found, this procedure will
return an error. Otherwise, the specified font becomes active and will be
used in all subsequent font operations.
HELP

    &pdb_misc;

    @inargs = (
	{ name => 'name', type => 'string',
	  desc => 'The name of the font' }
    );

    %invoke = (
        vars => [ 'GimpFont *font' ],
        code => <<'CODE'
{
  font = (GimpFont *)
    gimp_container_get_child_by_name (gimp->fonts, name);

  if (font)
    gimp_context_set_font (context, font);
  else
    success = FALSE;
}
CODE
    );
}

@headers = qw("core/gimp.h" "core/gimpcontainer.h" "core/gimpcontext.h"
              "core/gimpdatafactory.h"
              "plug-in/plug-in.h" "plug-in/plug-in-context.h");

@procs = qw(context_push context_pop
            context_get_foreground context_set_foreground
            context_get_background context_set_background
            context_set_default_colors context_swap_colors
            context_get_opacity context_set_opacity
            context_get_paint_mode context_set_paint_mode
            context_get_brush context_set_brush
            context_get_pattern context_set_pattern
            context_get_gradient context_set_gradient
            context_get_palette context_set_palette
            context_get_font context_set_font);
%exports = (app => [@procs], lib => [@procs]);

$desc = 'Context';

1;