gimp/app/invert.c

87 lines
2.3 KiB
C

/* 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.
*/
#include "config.h"
#include <glib.h>
#include "apptypes.h"
#include "appenv.h"
#include "drawable.h"
#include "invert.h"
#include "gimage.h"
#include "gimplut.h"
#include "lut_funcs.h"
#include "libgimp/gimpintl.h"
void
image_invert (GimpImage *gimage)
{
GimpDrawable *drawable;
Argument *return_vals;
gint nreturn_vals;
drawable = gimage_active_drawable (gimage);
if (gimp_drawable_is_indexed (drawable))
{
g_message (_("Invert does not operate on indexed drawables."));
return;
}
return_vals = procedural_db_run_proc ("gimp_invert",
&nreturn_vals,
PDB_DRAWABLE, drawable_ID (drawable),
PDB_END);
if (!return_vals || return_vals[0].value.pdb_int != PDB_SUCCESS)
g_message (_("Invert operation failed."));
procedural_db_destroy_args (return_vals, nreturn_vals);
}
/* Inverter */
void
invert (GimpDrawable *drawable)
{
PixelRegion srcPR, destPR;
gint x1, y1, x2, y2;
GimpLut *lut;
lut = invert_lut_new (gimp_drawable_bytes (drawable));
drawable_mask_bounds (drawable, &x1, &y1, &x2, &y2);
pixel_region_init (&srcPR, drawable_data (drawable),
x1, y1, (x2 - x1), (y2 - y1), FALSE);
pixel_region_init (&destPR, drawable_shadow (drawable),
x1, y1, (x2 - x1), (y2 - y1), TRUE);
pixel_regions_process_parallel ((p_func)gimp_lut_process, lut,
2, &srcPR, &destPR);
gimp_lut_free (lut);
drawable_merge_shadow (drawable, TRUE);
drawable_update (drawable, x1, y1, (x2 - x1), (y2 - y1));
}