mirror of https://github.com/GNOME/gimp.git
123 lines
3.9 KiB
C
123 lines
3.9 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* gimphistogram module Copyright (C) 1999 Jay Cox <jaycox@gimp.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl.h>
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#include "core-types.h"
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#include "gegl/gimp-gegl-nodes.h"
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#include "gimpchannel.h"
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#include "gimpdrawable-histogram.h"
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#include "gimphistogram.h"
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#include "gimpimage.h"
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void
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gimp_drawable_calculate_histogram (GimpDrawable *drawable,
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GimpHistogram *histogram)
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{
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GimpImage *image;
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GimpChannel *mask;
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gint x, y, width, height;
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g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
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g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)));
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g_return_if_fail (histogram != NULL);
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if (! gimp_item_mask_intersect (GIMP_ITEM (drawable), &x, &y, &width, &height))
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return;
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image = gimp_item_get_image (GIMP_ITEM (drawable));
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mask = gimp_image_get_mask (image);
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if (FALSE)
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{
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GeglNode *node = gegl_node_new ();
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GeglNode *buffer_source;
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GeglNode *histogram_sink;
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GeglProcessor *processor;
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buffer_source =
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gimp_gegl_add_buffer_source (node,
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gimp_drawable_get_buffer (drawable),
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0, 0);
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histogram_sink =
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gegl_node_new_child (node,
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"operation", "gimp:histogram-sink",
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"histogram", histogram,
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NULL);
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gegl_node_connect_to (buffer_source, "output",
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histogram_sink, "input");
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if (! gimp_channel_is_empty (mask))
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{
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GeglNode *mask_source;
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gint off_x, off_y;
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g_printerr ("adding mask aux\n");
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gimp_item_get_offset (GIMP_ITEM (drawable), &off_x, &off_y);
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mask_source =
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gimp_gegl_add_buffer_source (node,
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gimp_drawable_get_buffer (GIMP_DRAWABLE (mask)),
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-off_x, -off_y);
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gegl_node_connect_to (mask_source, "output",
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histogram_sink, "aux");
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}
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processor = gegl_node_new_processor (histogram_sink,
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GEGL_RECTANGLE (x, y, width, height));
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while (gegl_processor_work (processor, NULL));
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g_object_unref (processor);
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g_object_unref (node);
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}
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else
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{
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if (! gimp_channel_is_empty (mask))
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{
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gint off_x, off_y;
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gimp_item_get_offset (GIMP_ITEM (drawable), &off_x, &off_y);
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gimp_histogram_calculate (histogram,
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gimp_drawable_get_buffer (drawable),
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GEGL_RECTANGLE (x, y, width, height),
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gimp_drawable_get_buffer (GIMP_DRAWABLE (mask)),
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GEGL_RECTANGLE (x - off_x, y - off_y,
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width, height));
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}
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else
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{
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gimp_histogram_calculate (histogram,
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gimp_drawable_get_buffer (drawable),
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GEGL_RECTANGLE (x, y, width, height),
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NULL, NULL);
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}
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}
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}
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