mirror of
https://gitlab.gnome.org/GNOME/gimp
synced 2024-10-22 12:32:37 +00:00
4a0f7c5866
2000-12-30 Michael Natterer <mitch@gimp.org> * app/gimage.[ch]: removed all the "typedef gimage_function gimp_image_function" stuff so we can clearly see what is really a GImage function. Removed gimage_get_ID(). Use pdb_id_to_image() instead. * app/airbrush.c * app/desaturate.c * app/disp_callbacks.c * app/equalize.c * app/fileops.c * app/floating_sel.c * app/gdisplay_ops.c * app/gimpdrawable.c * app/global_edit.c * app/image_map.c * app/invert.c * app/lc_dialog.c * app/paths_dialog.c * app/plug_in.c * app/xcf.c * app/color_cmds.c * app/convert_cmds.c * app/image_cmds.c * tools/pdbgen/pdb/color.pdb * tools/pdbgen/pdb/convert.pdb * tools/pdbgen/pdb/image.pdb: changed accordingly.
117 lines
2.8 KiB
C
117 lines
2.8 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 <gtk/gtk.h>
|
|
|
|
#include "apptypes.h"
|
|
|
|
#include "appenv.h"
|
|
#include "drawable.h"
|
|
#include "desaturate.h"
|
|
#include "gimpimage.h"
|
|
#include "paint_funcs.h"
|
|
#include "pixel_region.h"
|
|
|
|
#include "libgimp/gimpintl.h"
|
|
|
|
|
|
void
|
|
image_desaturate (GimpImage *gimage)
|
|
{
|
|
GimpDrawable *drawable;
|
|
|
|
drawable = gimp_image_active_drawable (gimage);
|
|
|
|
if (! drawable_color (drawable))
|
|
{
|
|
g_message (_("Desaturate operates only on RGB color drawables."));
|
|
return;
|
|
}
|
|
desaturate (drawable);
|
|
}
|
|
|
|
|
|
/* Desaturater */
|
|
|
|
void
|
|
desaturate (GimpDrawable *drawable)
|
|
{
|
|
PixelRegion srcPR, destPR;
|
|
guchar *src, *s;
|
|
guchar *dest, *d;
|
|
gint h, j;
|
|
gint lightness, min, max;
|
|
gint has_alpha;
|
|
gpointer pr;
|
|
gint x1, y1, x2, y2;
|
|
|
|
if (!drawable)
|
|
return;
|
|
|
|
has_alpha = gimp_drawable_has_alpha (drawable);
|
|
gimp_drawable_mask_bounds (drawable, &x1, &y1, &x2, &y2);
|
|
|
|
pixel_region_init (&srcPR, gimp_drawable_data (drawable),
|
|
x1, y1, (x2 - x1), (y2 - y1), FALSE);
|
|
pixel_region_init (&destPR, gimp_drawable_shadow (drawable),
|
|
x1, y1, (x2 - x1), (y2 - y1), TRUE);
|
|
|
|
for (pr = pixel_regions_register (2, &srcPR, &destPR);
|
|
pr != NULL;
|
|
pr = pixel_regions_process (pr))
|
|
{
|
|
src = srcPR.data;
|
|
dest = destPR.data;
|
|
h = srcPR.h;
|
|
|
|
while (h--)
|
|
{
|
|
s = src;
|
|
d = dest;
|
|
|
|
for (j = 0; j < srcPR.w; j++)
|
|
{
|
|
max = MAX (s[RED_PIX], s[GREEN_PIX]);
|
|
max = MAX (max, s[BLUE_PIX]);
|
|
min = MIN (s[RED_PIX], s[GREEN_PIX]);
|
|
min = MIN (min, s[BLUE_PIX]);
|
|
|
|
lightness = (max + min) / 2;
|
|
|
|
d[RED_PIX] = lightness;
|
|
d[GREEN_PIX] = lightness;
|
|
d[BLUE_PIX] = lightness;
|
|
|
|
if (has_alpha)
|
|
d[ALPHA_PIX] = s[ALPHA_PIX];
|
|
|
|
d += destPR.bytes;
|
|
s += srcPR.bytes;
|
|
}
|
|
|
|
src += srcPR.rowstride;
|
|
dest += destPR.rowstride;
|
|
}
|
|
}
|
|
|
|
drawable_merge_shadow (drawable, TRUE);
|
|
drawable_update (drawable, x1, y1, (x2 - x1), (y2 - y1));
|
|
}
|