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3220f9ec94
2001-01-14 Michael Natterer <mitch@gimp.org> * app/channel.[ch] * app/drawable.[ch] * app/gdisplay.[ch] * app/gimpdrawable.[ch] * app/layer.[ch]: - Removed all "typedef drawable_function gimp_drawable_function". - Renamed all *_get_ID() functions to *_get_by_ID(). - For symmetry reasons, renamed drawable_ID() to gimp_drawable_get_ID(). - Removed the *_get_ID() functions of GimpLayer, GimpLayerMask and GimpChannel. * app/airbrush.c * app/bezier_select.c * app/blend.c * app/brightness_contrast.c * app/bucket_fill.c * app/by_color_select.c * app/clone.c * app/color_balance.c * app/color_picker.c * app/convert.c * app/convolve.c * app/crop.c * app/curves.c * app/desaturate.c * app/dodgeburn.c * app/edit_selection.c * app/eraser.c * app/fileops.c * app/flip_tool.c * app/floating_sel.c * app/fuzzy_select.c * app/gimage.c * app/gimage_mask.c * app/gimphistogram.c * app/gimpimage.c * app/global_edit.c * app/histogram_tool.c * app/hue_saturation.c * app/image_map.c * app/ink.c * app/invert.c * app/layer_select.c * app/layers_dialog.c * app/levels.c * app/paint_core.c * app/paintbrush.c * app/pencil.c * app/plug_in.c * app/posterize.c * app/scan_convert.c * app/smudge.c * app/text_tool.c * app/threshold.c * app/transform_core.c * app/undo.c * app/undo_history.c * app/channel_cmds.c * app/channel_ops_cmds.c * app/color_cmds.c * app/display_cmds.c * app/drawable_cmds.c * app/edit_cmds.c * app/floating_sel_cmds.c * app/image_cmds.c * app/layer_cmds.c * app/parasite_cmds.c * app/selection_cmds.c * app/text_tool_cmds.c * app/tools_cmds.c * libgimp/gimpdrawable_pdb.c * tools/pdbgen/pdb.pl * tools/pdbgen/pdb/channel_ops.pdb * tools/pdbgen/pdb/color.pdb * tools/pdbgen/pdb/drawable.pdb * tools/pdbgen/pdb/edit.pdb * tools/pdbgen/pdb/image.pdb * tools/pdbgen/pdb/selection.pdb * tools/pdbgen/pdb/tools.pdb: changed accordingly.
117 lines
2.8 KiB
C
117 lines
2.8 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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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 2 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <gtk/gtk.h>
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#include "apptypes.h"
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#include "appenv.h"
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#include "drawable.h"
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#include "desaturate.h"
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#include "gimpimage.h"
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#include "paint_funcs.h"
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#include "pixel_region.h"
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#include "libgimp/gimpintl.h"
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void
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image_desaturate (GimpImage *gimage)
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{
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GimpDrawable *drawable;
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drawable = gimp_image_active_drawable (gimage);
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if (! gimp_drawable_is_rgb (drawable))
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{
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g_message (_("Desaturate operates only on RGB color drawables."));
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return;
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}
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desaturate (drawable);
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}
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/* Desaturater */
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void
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desaturate (GimpDrawable *drawable)
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{
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PixelRegion srcPR, destPR;
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guchar *src, *s;
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guchar *dest, *d;
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gint h, j;
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gint lightness, min, max;
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gint has_alpha;
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gpointer pr;
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gint x1, y1, x2, y2;
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if (!drawable)
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return;
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has_alpha = gimp_drawable_has_alpha (drawable);
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gimp_drawable_mask_bounds (drawable, &x1, &y1, &x2, &y2);
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pixel_region_init (&srcPR, gimp_drawable_data (drawable),
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x1, y1, (x2 - x1), (y2 - y1), FALSE);
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pixel_region_init (&destPR, gimp_drawable_shadow (drawable),
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x1, y1, (x2 - x1), (y2 - y1), TRUE);
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for (pr = pixel_regions_register (2, &srcPR, &destPR);
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pr != NULL;
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pr = pixel_regions_process (pr))
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{
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src = srcPR.data;
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dest = destPR.data;
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h = srcPR.h;
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while (h--)
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{
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s = src;
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d = dest;
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for (j = 0; j < srcPR.w; j++)
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{
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max = MAX (s[RED_PIX], s[GREEN_PIX]);
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max = MAX (max, s[BLUE_PIX]);
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min = MIN (s[RED_PIX], s[GREEN_PIX]);
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min = MIN (min, s[BLUE_PIX]);
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lightness = (max + min) / 2;
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d[RED_PIX] = lightness;
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d[GREEN_PIX] = lightness;
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d[BLUE_PIX] = lightness;
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if (has_alpha)
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d[ALPHA_PIX] = s[ALPHA_PIX];
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d += destPR.bytes;
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s += srcPR.bytes;
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}
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src += srcPR.rowstride;
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dest += destPR.rowstride;
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}
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}
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gimp_drawable_merge_shadow (drawable, TRUE);
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drawable_update (drawable, x1, y1, (x2 - x1), (y2 - y1));
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}
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