mirror of https://github.com/GNOME/gimp.git
161 lines
4.6 KiB
C
161 lines
4.6 KiB
C
/*
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This is a plug-in for the GIMP.
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*
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* Colormap-Rotation plug-in. Exchanges two color ranges.
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*
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* Copyright (C) 1999 Sven Anders (anderss@fmi.uni-passau.de)
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* Based on code from Pavel Grinfeld (pavel@ml.com)
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*
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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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/*----------------------------------------------------------------------------
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* Change log:
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*
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* Version 2.0, 04 April 1999.
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* Nearly complete rewrite, made plug-in stable.
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* (Works with GIMP 1.1 and GTK+ 1.2)
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*
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* Version 1.0, 27 March 1997.
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* Initial (unstable) release by Pavel Grinfeld
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*
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*----------------------------------------------------------------------------*/
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#include "config.h"
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#include <libgimp/gimp.h>
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#include <libgimp/gimpui.h>
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#include "rcm.h"
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#include "rcm_misc.h"
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#include "rcm_dialog.h"
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#include "rcm_gdk.h"
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/* Global variables */
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GdkGC *xor_gc;
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/* Drawing routines */
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void
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rcm_draw_little_circle (GdkWindow *window,
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GdkGC *color,
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gfloat hue,
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gfloat satur)
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{
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gint x,y;
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x = GRAY_CENTER + GRAY_RADIUS * satur * cos(hue);
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y = GRAY_CENTER - GRAY_RADIUS * satur * sin(hue);
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gdk_draw_arc (window, color, 0, x-LITTLE_RADIUS, y-LITTLE_RADIUS,
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2*LITTLE_RADIUS, 2*LITTLE_RADIUS, 0, 360*64);
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}
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void
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rcm_draw_large_circle (GdkWindow *window,
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GdkGC *color,
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gfloat gray_sat)
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{
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gint x, y;
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x = GRAY_CENTER;
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y = GRAY_CENTER;
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gdk_draw_arc (window, color, 0,
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ROUND (x - GRAY_RADIUS * gray_sat),
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ROUND (y - GRAY_RADIUS * gray_sat),
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ROUND (2 * GRAY_RADIUS * gray_sat),
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ROUND (2 * GRAY_RADIUS * gray_sat),
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0, 360 * 64);
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}
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#define REL .8
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#define DEL .1
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#define TICK 10
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void
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rcm_draw_arrows (GdkWindow *window,
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GdkGC *color,
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RcmAngle *angle)
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{
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gint dist;
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gfloat alpha, beta, cw_ccw, delta;
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alpha = angle->alpha;
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beta = angle->beta;
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cw_ccw = angle->cw_ccw;
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delta = angle_mod_2PI(beta - alpha);
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if (cw_ccw == -1)
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delta = delta - TP;
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gdk_draw_line (window,color,
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CENTER,
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CENTER,
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ROUND (CENTER + RADIUS * cos(alpha)),
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ROUND (CENTER - RADIUS * sin(alpha)));
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gdk_draw_line( window,color,
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CENTER + RADIUS * cos(alpha),
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CENTER - RADIUS * sin(alpha),
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ROUND (CENTER + RADIUS * REL * cos(alpha - DEL)),
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ROUND (CENTER - RADIUS * REL * sin(alpha - DEL)));
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gdk_draw_line (window,color,
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CENTER + RADIUS * cos(alpha),
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CENTER - RADIUS * sin(alpha),
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ROUND (CENTER + RADIUS * REL * cos(alpha + DEL)),
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ROUND (CENTER - RADIUS * REL * sin(alpha + DEL)));
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gdk_draw_line (window,color,
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CENTER,
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CENTER,
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ROUND (CENTER + RADIUS * cos(beta)),
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ROUND (CENTER - RADIUS * sin(beta)));
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gdk_draw_line (window,color,
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CENTER + RADIUS * cos(beta),
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CENTER - RADIUS * sin(beta),
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ROUND (CENTER + RADIUS * REL * cos(beta - DEL)),
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ROUND (CENTER - RADIUS * REL * sin(beta - DEL)));
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gdk_draw_line (window,color,
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CENTER + RADIUS * cos(beta),
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CENTER - RADIUS * sin(beta),
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ROUND (CENTER + RADIUS * REL * cos(beta + DEL)),
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ROUND (CENTER - RADIUS * REL * sin(beta + DEL)));
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dist = RADIUS * EACH_OR_BOTH;
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gdk_draw_line (window,color,
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CENTER + dist * cos(beta),
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CENTER - dist * sin(beta),
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ROUND (CENTER + dist * cos(beta) + cw_ccw * TICK * sin(beta)),
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ROUND (CENTER - dist * sin(beta) + cw_ccw * TICK * cos(beta)));
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alpha *= 180 * 64 / G_PI;
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delta *= 180 * 64 / G_PI;
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gdk_draw_arc (window, color, 0, CENTER - dist, CENTER - dist,
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2*dist, 2*dist, alpha, delta);
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}
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