gimp/app/core/gimpdrawable-histogram.c

124 lines
3.9 KiB
C

/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimphistogram module Copyright (C) 1999 Jay Cox <jaycox@gimp.org>
*
* 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 <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "core-types.h"
#include "gegl/gimp-gegl-nodes.h"
#include "gimpchannel.h"
#include "gimpdrawable-histogram.h"
#include "gimphistogram.h"
#include "gimpimage.h"
void
gimp_drawable_calculate_histogram (GimpDrawable *drawable,
GimpHistogram *histogram)
{
GimpImage *image;
GimpChannel *mask;
gint x, y, width, height;
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)));
g_return_if_fail (histogram != NULL);
if (! gimp_item_mask_intersect (GIMP_ITEM (drawable), &x, &y, &width, &height))
return;
image = gimp_item_get_image (GIMP_ITEM (drawable));
mask = gimp_image_get_mask (image);
if (FALSE)
{
GeglNode *node = gegl_node_new ();
GeglNode *buffer_source;
GeglNode *histogram_sink;
GeglProcessor *processor;
buffer_source =
gimp_gegl_add_buffer_source (node,
gimp_drawable_get_buffer (drawable),
0, 0);
histogram_sink =
gegl_node_new_child (node,
"operation", "gimp:histogram-sink",
"histogram", histogram,
NULL);
gegl_node_connect_to (buffer_source, "output",
histogram_sink, "input");
if (! gimp_channel_is_empty (mask))
{
GeglNode *mask_source;
gint off_x, off_y;
g_printerr ("adding mask aux\n");
gimp_item_get_offset (GIMP_ITEM (drawable), &off_x, &off_y);
mask_source =
gimp_gegl_add_buffer_source (node,
gimp_drawable_get_buffer (GIMP_DRAWABLE (mask)),
-off_x, -off_y);
gegl_node_connect_to (mask_source, "output",
histogram_sink, "aux");
}
processor = gegl_node_new_processor (histogram_sink,
GEGL_RECTANGLE (x, y, width, height));
while (gegl_processor_work (processor, NULL));
g_object_unref (processor);
g_object_unref (node);
}
else
{
if (! gimp_channel_is_empty (mask))
{
gint off_x, off_y;
gimp_item_get_offset (GIMP_ITEM (drawable), &off_x, &off_y);
gimp_histogram_calculate (histogram,
gimp_drawable_get_buffer (drawable),
GEGL_RECTANGLE (x, y, width, height),
gimp_drawable_get_buffer (GIMP_DRAWABLE (mask)),
GEGL_RECTANGLE (x + off_x, y + off_y,
width, height));
}
else
{
gimp_histogram_calculate (histogram,
gimp_drawable_get_buffer (drawable),
GEGL_RECTANGLE (x, y, width, height),
NULL, NULL);
}
}
}