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- /*
- * Copyright (C) 1995 Spencer Kimball and Peter Mattis
- *
- * This is a plug-in for the GIMP.
- *
- * Colormap-Rotation plug-in. Exchanges two color ranges.
- *
- * Copyright (C) 1999 Sven Anders (anderss@fmi.uni-passau.de)
- * Based on code from Pavel Grinfeld (pavel@ml.com)
- *
- *
- * 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.
- */
-
- /*-----------------------------------------------------------------------------------
- * Change log:
- *
- * Version 2.0, 04 April 1999.
- * Nearly complete rewrite, made plug-in stable.
- * (Works with GIMP 1.1 and GTK+ 1.2)
- *
- * Version 1.0, 27 March 1997.
- * Initial (unstable) release by Pavel Grinfeld
- *
- *-----------------------------------------------------------------------------------*/
-
- #include <stdio.h>
- #include <stdlib.h>
- #include <math.h>
-
- #include "config.h"
- #include <gtk/gtk.h>
- #include "libgimp/gimp.h"
- #include "libgimp/stdplugins-intl.h"
-
- #include "rcm.h"
- #include "rcm_misc.h"
- #include "rcm_dialog.h"
- #include "rcm_callback.h"
-
- /*-----------------------------------------------------------------------------------*/
- /* Forward declarations */
- /*-----------------------------------------------------------------------------------*/
-
- void query (void);
- void run (char *name, int nparams, GimpParam *param, int *nreturn_vals, GimpParam **return_vals);
-
- /*-----------------------------------------------------------------------------------*/
- /* Global variables */
- /*-----------------------------------------------------------------------------------*/
-
- RcmParams Current =
- {
- SELECTION, /* SELECTION ONLY */
- TRUE, /* REAL TIME */
- FALSE, /* SUCCESS */
- RADIANS_OVER_PI, /* START IN RADIANS OVER PI */
- GRAY_TO
- };
-
- /*-----------------------------------------------------------------------------------*/
- /* Local variables */
- /*-----------------------------------------------------------------------------------*/
-
- GimpPlugInInfo PLUG_IN_INFO =
- {
- NULL, /* init_proc */
- NULL, /* quit_proc */
- query, /* query_proc */
- run, /* run_proc */
- };
-
- /*-----------------------------------------------------------------------------------*/
- /* Dummy function */
- /*-----------------------------------------------------------------------------------*/
-
- MAIN()
-
- /*-----------------------------------------------------------------------------------*/
- /* Query plug-in */
- /*-----------------------------------------------------------------------------------*/
-
- void
- query (void)
- {
- GimpParamDef args[] =
- {
- { GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
- { GIMP_PDB_IMAGE, "image", "Input image (used for indexed images)" },
- { GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
- };
-
- GimpParamDef *return_vals = NULL;
- int nargs = sizeof (args) / sizeof (args[0]);
- int nreturn_vals = 0;
-
- INIT_I18N();
- gimp_install_procedure ("plug-in-rotate-colormap",
- "Colormap rotation as in xv",
- "Exchanges two color ranges. "
- "Based on code from Pavel Grinfeld (pavel@ml.com). "
- "This version written by Sven Anders (anderss@fmi.uni-passau.de).",
- "Sven Anders (anderss@fmi.uni-passau.de) and Pavel Grinfeld (pavel@ml.com)",
- "Sven Anders (anderss@fmi.uni-passau.de)",
- "04th April 1999",
- N_("<Image>/Image/Colors/Colormap Rotation..."),
- "RGB*",
- GIMP_PLUGIN,
- nargs, nreturn_vals,
- args, return_vals);
- }
-
- /*-----------------------------------------------------------------------------------*/
- /* Rotate colormap of a single row */
- /*-----------------------------------------------------------------------------------*/
-
- void
- rcm_row (const guchar *src_row,
- guchar *dest_row,
- gint row,
- gint row_width,
- gint bytes)
- {
- gint col, bytenum, skip;
- gdouble H,S,V;
- guchar rgb[3];
-
- for (col=0; col < row_width; col++)
- {
- skip = 0;
-
- rgb[0] = src_row[col*bytes + 0];
- rgb[1] = src_row[col*bytes + 1];
- rgb[2] = src_row[col*bytes + 2];
-
- gimp_rgb_to_hsv4 (rgb, &H, &S, &V);
-
- if (rcm_is_gray(S))
- {
- if (Current.Gray_to_from == GRAY_FROM)
- {
- if (rcm_angle_inside_slice(Current.Gray->hue,Current.From->angle) <= 1)
- {
- H = Current.Gray->hue / TP;
- S = Current.Gray->satur;
- }
- else
- {
- skip = 1;
- }
- }
- else
- {
- skip = 1;
- gimp_hsv_to_rgb4 (rgb, Current.Gray->hue/TP, Current.Gray->satur, V);
- }
- }
-
- if (!skip)
- {
- H = rcm_linear(rcm_left_end(Current.From->angle),
- rcm_right_end(Current.From->angle),
- rcm_left_end(Current.To->angle),
- rcm_right_end(Current.To->angle),
- H*TP);
-
- H = angle_mod_2PI(H) / TP;
- gimp_hsv_to_rgb4 (rgb, H, S, V);
- }
-
- dest_row[col * bytes + 0] = rgb[0];
- dest_row[col * bytes + 1] = rgb[1];
- dest_row[col * bytes + 2] = rgb[2];
-
- if (bytes > 3)
- {
- for (bytenum=3; bytenum<bytes; bytenum++)
- dest_row[col*bytes+bytenum] = src_row[col*bytes+bytenum];
- }
- }
- }
-
- /*-----------------------------------------------------------------------------------*/
- /* Rotate colormap row by row ... */
- /*-----------------------------------------------------------------------------------*/
-
- void
- rcm (GimpDrawable *drawable)
- {
- GimpPixelRgn srcPR, destPR;
- gint width, height;
- gint bytes;
- guchar *src_row, *dest_row;
- gint row;
- gint x1, y1, x2, y2;
-
- gimp_drawable_mask_bounds (drawable->id, &x1, &y1, &x2, &y2);
-
- width = drawable->width;
- height = drawable->height;
- bytes = drawable->bpp;
-
- src_row = (guchar *) malloc ((x2 - x1) * bytes);
- dest_row = (guchar *) malloc ((x2 - x1) * bytes);
-
- gimp_pixel_rgn_init(&srcPR, drawable, 0, 0, width, height, FALSE, FALSE);
- gimp_pixel_rgn_init(&destPR, drawable, 0, 0, width, height, TRUE, TRUE);
-
- for (row=y1; row < y2; row++)
- {
- gimp_pixel_rgn_get_row(&srcPR, src_row, x1, row, (x2 - x1));
-
- rcm_row(src_row, dest_row, row, (x2 - x1), bytes);
-
- gimp_pixel_rgn_set_row(&destPR, dest_row, x1, row, (x2 - x1));
-
- if ((row % 10) == 0)
- gimp_progress_update((double) row / (double) (y2 - y1));
- }
-
- /* update the processed region */
-
- gimp_drawable_flush(drawable);
- gimp_drawable_merge_shadow(drawable->id, TRUE);
- gimp_drawable_update(drawable->id, x1, y1, (x2 - x1), (y2 - y1));
-
- free (src_row);
- free (dest_row);
- }
-
- /*-----------------------------------------------------------------------------------*/
- /* STANDARD RUN */
- /*-----------------------------------------------------------------------------------*/
-
- void
- run (char *name,
- int nparams,
- GimpParam *param,
- int *nreturn_vals,
- GimpParam **return_vals)
- {
- GimpParam values[1];
- GimpPDBStatusType status = GIMP_PDB_SUCCESS;
-
- *nreturn_vals = 1;
- *return_vals = values;
-
- values[0].type = GIMP_PDB_STATUS;
- values[0].data.d_status = status;
-
- Current.drawable = gimp_drawable_get(param[2].data.d_drawable);
- Current.mask = gimp_drawable_get(gimp_image_get_selection(param[1].data.d_image));
-
- /* works not on INDEXED images */
-
- if (gimp_drawable_is_indexed (Current.drawable->id) ||
- gimp_drawable_is_gray (Current.drawable->id) )
- {
- status = GIMP_PDB_EXECUTION_ERROR;
- }
- else
- {
- /* call dialog and rotate the colormap */
-
- INIT_I18N_UI();
-
- if (gimp_drawable_is_rgb(Current.drawable->id) && rcm_dialog())
- {
- gimp_progress_init(_("Rotating the colormap..."));
-
- gimp_tile_cache_ntiles(2 * (Current.drawable->width / gimp_tile_width() + 1));
- rcm(Current.drawable);
- gimp_displays_flush();
- }
- else
- status = GIMP_PDB_EXECUTION_ERROR;
- }
-
- values[0].data.d_status = status;
- if (status == GIMP_PDB_SUCCESS)
- gimp_drawable_detach(Current.drawable);
- }
-