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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 <gtk/gtk.h>
- #include <libgimp/gimp.h>
-
- #include "rcm.h"
- #include "rcm_misc.h"
- #include "rcm_dialog.h"
- #include "rcm_gdk.h"
-
- /*-----------------------------------------------------------------------------------*/
- /* Global variables */
- /*-----------------------------------------------------------------------------------*/
-
- GdkGC *xor_gc;
-
-
- /*-----------------------------------------------------------------------------------*/
- /* Drawing routines */
- /*-----------------------------------------------------------------------------------*/
-
- void
- rcm_draw_little_circle (GdkWindow *window,
- GdkGC *color,
- float hue,
- float satur)
- {
- int x,y;
-
- x = GRAY_CENTER + GRAY_RADIUS * satur * cos(hue);
- y = GRAY_CENTER - GRAY_RADIUS * satur * sin(hue);
-
- gdk_draw_arc(window, color, 0, x-LITTLE_RADIUS, y-LITTLE_RADIUS,
- 2*LITTLE_RADIUS, 2*LITTLE_RADIUS, 0, 360*64);
- }
-
- /*-----------------------------------------------------------------------------------*/
-
- void
- rcm_draw_large_circle (GdkWindow *window,
- GdkGC *color,
- float gray_sat)
- {
- int x, y;
-
- x = GRAY_CENTER;
- y = GRAY_CENTER;
-
- gdk_draw_arc(window, color, 0,
- ROUND (x - GRAY_RADIUS * gray_sat),
- ROUND (y - GRAY_RADIUS * gray_sat),
- ROUND (2 * GRAY_RADIUS * gray_sat),
- ROUND (2 * GRAY_RADIUS * gray_sat),
- 0, 360 * 64);
- }
-
- /*-----------------------------------------------------------------------------------*/
-
- #define REL .8
- #define DEL .1
- #define TICK 10
-
- void
- rcm_draw_arrows (GdkWindow *window,
- GdkGC *color,
- RcmAngle *angle)
- {
- int dist;
- float alpha, beta, cw_ccw, delta;
-
- alpha = angle->alpha;
- beta = angle->beta;
- cw_ccw = angle->cw_ccw;
- delta = angle_mod_2PI(beta - alpha);
- if (cw_ccw == -1) delta = delta - TP;
-
- gdk_draw_line(window,color,
- CENTER,
- CENTER,
- ROUND (CENTER + RADIUS * cos(alpha)),
- ROUND (CENTER - RADIUS * sin(alpha)));
-
- gdk_draw_line(window,color,
- CENTER + RADIUS * cos(alpha),
- CENTER - RADIUS * sin(alpha),
- ROUND (CENTER + RADIUS * REL * cos(alpha - DEL)),
- ROUND (CENTER - RADIUS * REL * sin(alpha - DEL)));
-
- gdk_draw_line(window,color,
- CENTER + RADIUS * cos(alpha),
- CENTER - RADIUS * sin(alpha),
- ROUND (CENTER + RADIUS * REL * cos(alpha + DEL)),
- ROUND (CENTER - RADIUS * REL * sin(alpha + DEL)));
-
- gdk_draw_line(window,color,
- CENTER,
- CENTER,
- ROUND (CENTER + RADIUS * cos(beta)),
- ROUND (CENTER - RADIUS * sin(beta)));
-
- gdk_draw_line(window,color,
- CENTER + RADIUS * cos(beta),
- CENTER - RADIUS * sin(beta),
- ROUND (CENTER + RADIUS * REL * cos(beta - DEL)),
- ROUND (CENTER - RADIUS * REL * sin(beta - DEL)));
-
- gdk_draw_line(window,color,
- CENTER + RADIUS * cos(beta),
- CENTER - RADIUS * sin(beta),
- ROUND (CENTER + RADIUS * REL * cos(beta + DEL)),
- ROUND (CENTER - RADIUS * REL * sin(beta + DEL)));
-
- dist = RADIUS * EACH_OR_BOTH;
-
- gdk_draw_line(window,color,
- CENTER + dist * cos(beta),
- CENTER - dist * sin(beta),
- ROUND (CENTER + dist * cos(beta) + cw_ccw * TICK * sin(beta)),
- ROUND (CENTER - dist * sin(beta) + cw_ccw * TICK * cos(beta)));
-
- alpha *= 180 * 64 / G_PI;
- delta *= 180 * 64 / G_PI;
-
- gdk_draw_arc(window, color, 0, CENTER - dist, CENTER - dist,
- 2*dist, 2*dist, alpha, delta);
- }
-