gimp/app/gimpdrawable-equalize.c

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/* 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.
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*/
#include "drawable.h"
#include "equalize.h"
#include "gimage.h"
#include "gimplut.h"
build color_cmds, lut_funcs, and pixel_processor feedback in the splash * app/Makefile.am: build color_cmds, lut_funcs, and pixel_processor * app/app_procs.c: feedback in the splash screen when loading parasites. * app/boundary.c: Optimized find_empty_segs. * app/brightness_contrast.[ch] * app/levels.[ch] * app/posterize.[ch]: moved pdb and lut calculation code. These files now contain only GUI functions. * app/channel.c: Optimized channel_bounds (fewer compares, better use of registers). Use color_region instead of channel_*_segment in channel_combine_rect. Optimized channel_combine_ellipse by skipping pixels inside of the ellipse. Use pixel_region_process_parallel in channel_combine_mask. Use a GimpLut in channel_invert, and channel_sharpen. * app/invert.c * app/equalize.c: moved the lut functions to lut_funcs.c * app/gimpdrawable.c, app/gimpdrawableP.h * app/gimpimage.c, app/gimpimageP.h: removed unused gimpmatrix variables/includes. * app/gimplut.[ch]: added new function gimp_lut_process_inline that operates on a single PixelRegion. * app/gimpparasite.[ch]: new functions to save/load parasiterc * app/parasitelist.[ch]: new functions to save/load ParasiteLists in/from files. * libgimp/parasite.[ch]: new functions to load/save parasites. * app/internal_procs.c: get some procs from new location in color_cmds.h. * app/pixel_region.[ch]: moved pixel_regions_process_parallel related functions to a new file. * app/color_cmds.[ch]: new files for PDB definitions/implementations of color correction functions. * app/lut_funcs.[ch]: new files to hold lut creation functions. * app/pixel_processor.[ch]: new files that contain the pixel_regions_process_parallel routines. Added some new capabilities that are currently unused.
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#include "lut_funcs.h"
#include "gimphistogram.h"
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#include "libgimp/gimpintl.h"
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void
image_equalize (GimpImage *gimage)
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{
GimpDrawable *drawable;
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drawable = gimage_active_drawable (gimage);
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if (gimp_drawable_indexed (drawable))
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{
g_message (_("Equalize does not operate on indexed drawables."));
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return;
}
equalize (gimage, drawable, TRUE);
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}
void
equalize (GimpImage *gimage,
GimpDrawable *drawable,
gboolean mask_only)
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{
PixelRegion srcPR, destPR;
unsigned char *mask;
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int has_alpha;
int alpha, bytes;
int x1, y1, x2, y2;
GimpHistogram *hist;
GimpLut *lut;
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mask = NULL;
bytes = drawable_bytes (drawable);
has_alpha = drawable_has_alpha (drawable);
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alpha = has_alpha ? (bytes - 1) : bytes;
hist = gimp_histogram_new();
gimp_histogram_calculate_drawable(hist, drawable);
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/* Build equalization LUT */
build color_cmds, lut_funcs, and pixel_processor feedback in the splash * app/Makefile.am: build color_cmds, lut_funcs, and pixel_processor * app/app_procs.c: feedback in the splash screen when loading parasites. * app/boundary.c: Optimized find_empty_segs. * app/brightness_contrast.[ch] * app/levels.[ch] * app/posterize.[ch]: moved pdb and lut calculation code. These files now contain only GUI functions. * app/channel.c: Optimized channel_bounds (fewer compares, better use of registers). Use color_region instead of channel_*_segment in channel_combine_rect. Optimized channel_combine_ellipse by skipping pixels inside of the ellipse. Use pixel_region_process_parallel in channel_combine_mask. Use a GimpLut in channel_invert, and channel_sharpen. * app/invert.c * app/equalize.c: moved the lut functions to lut_funcs.c * app/gimpdrawable.c, app/gimpdrawableP.h * app/gimpimage.c, app/gimpimageP.h: removed unused gimpmatrix variables/includes. * app/gimplut.[ch]: added new function gimp_lut_process_inline that operates on a single PixelRegion. * app/gimpparasite.[ch]: new functions to save/load parasiterc * app/parasitelist.[ch]: new functions to save/load ParasiteLists in/from files. * libgimp/parasite.[ch]: new functions to load/save parasites. * app/internal_procs.c: get some procs from new location in color_cmds.h. * app/pixel_region.[ch]: moved pixel_regions_process_parallel related functions to a new file. * app/color_cmds.[ch]: new files for PDB definitions/implementations of color correction functions. * app/lut_funcs.[ch]: new files to hold lut creation functions. * app/pixel_processor.[ch]: new files that contain the pixel_regions_process_parallel routines. Added some new capabilities that are currently unused.
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lut = eq_histogram_lut_new (hist, bytes);
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/* Apply the histogram */
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);
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pixel_regions_process_parallel((p_func)gimp_lut_process, lut,
2, &srcPR, &destPR);
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gimp_lut_free(lut);
gimp_histogram_free(hist);
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drawable_merge_shadow (drawable, TRUE);
drawable_update (drawable, x1, y1, (x2 - x1), (y2 - y1));
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}