mirror of https://github.com/GNOME/gimp.git
167 lines
4.6 KiB
C
167 lines
4.6 KiB
C
/*
|
|
* 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);
|
|
}
|