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#include "config.h"
/* Copyright (C) 2002 Brad Jorsch <anomie@users.sourceforge.net>
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
*/
/* One-line algorithm from http://www.moonstick.com/moon_phase_emergency.htm
* It's a bit rough, but it works well enough */
#if TM_IN_SYS_TIME
# if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
# else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
# endif
#else
#include <time.h>
#endif
#include <math.h>
#include <X11/Xlib.h>
#include <X11/xpm.h>
#include "convert.h"
#include "wmgeneral/wmgeneral-x11.h"
static double fpart(double t){
return t-trunc(t);
}
double calc_moon(int month, int day, int year, int hm){
time_t t=time(NULL);
struct tm *tm;
double p;
tm=gmtime(&t);
tm->tm_hour=hm/100;
tm->tm_min=hm%100;
tm->tm_sec=0;
tm->tm_mon=month-1;
tm->tm_mday=day;
tm->tm_year=year;
t=mkgmtime(tm);
/* This next line is the algorithm. */
p=fpart(((t/86400.0-11323.0)*850.0+5130.5769)/25101.0);
if(p>.5) return -.5+cos(2*PI*p)/2;
return .5-cos(2*PI*p)/2;
}
#define darkside 0.19921875
#define lightside (1-0.19921875)
#define maxwidth 17
static int widths[]={ 7, 11, 13, 15, 15, 17, 17, 17, 17, 17, 17, 17, 15, 15, 13, 11, 7, -1 };
extern int screen;
extern XpmIcon wmgen;
extern GC NormalGC;
/* Duplicates quite a bit of code from combineWithOpacity for speed */
void copySunMoon(int x, int y, double percent){
XImage *pix;
unsigned int w, h, bar;
int foo;
Window baz;
int rmask, gmask, bmask;
unsigned long spixel;
int xx, terminator, oflag;
int flag;
double frac;
if(isnan(percent)){
copyPixmapArea(164, 64, 26, 25, x, y);
return;
}
XGetGeometry(display, wmgen.pixmap, &baz, &foo, &foo, &w, &h, &bar, &bar);
pix=XGetImage(display, wmgen.pixmap, 0, 0, w, h, AllPlanes, ZPixmap);
if (pix->depth == DefaultDepth(display, screen)) {{
Visual *visual=DefaultVisual(display, screen);
rmask = visual->red_mask;
gmask = visual->green_mask;
bmask = visual->blue_mask;
}} else {
rmask = pix->red_mask;
gmask = pix->green_mask;
bmask = pix->blue_mask;
}
x+=4; y+=4;
flag=(percent<0);
if(flag) percent=-percent;
for(h=0; widths[h]>0; h++){
xx=(maxwidth-widths[h])>>1;
if(flag){
oflag=1;
terminator=widths[h]*percent;
} else {
oflag=0;
terminator=widths[h]-widths[h]*percent;
}
frac=lightside*fpart(widths[h]*percent)+darkside;
for(w=0; w<widths[h]; w++){
spixel=XGetPixel(pix, 168+xx+w, 93+h);
if(w==terminator){
oflag=!oflag;
XPutPixel(pix, x+xx+w, y+h,
(((unsigned long)((spixel&rmask)*frac))&rmask) |
(((unsigned long)((spixel&gmask)*frac))&gmask) |
(((unsigned long)((spixel&bmask)*frac))&bmask));
} else if(oflag){
XPutPixel(pix, x+xx+w, y+h, spixel);
} else {
XPutPixel(pix, x+xx+w, y+h,
(((unsigned long)((spixel&rmask)*darkside))&rmask) |
(((unsigned long)((spixel&gmask)*darkside))&gmask) |
(((unsigned long)((spixel&bmask)*darkside))&bmask));
}
}
}
XPutImage(display, wmgen.pixmap, NormalGC, pix, 0, 0, 0, 0, pix->width, pix->height);
XDestroyImage(pix);
}
#if 0
void copySunMoon(int x, int y, double percent){
int w, h;
int xx;
int frac;
int flag;
if(isnan(percent)){
copyPixmapArea(164, 64, 26, 25, x, y);
return;
}
combineWithOpacity(164, 89, 26, 25, x, y, 51);
x+=4; y+=4;
flag=(percent<0);
if(flag) percent=-percent;
for(h=0; h<=8; h++){
w=widths[h]*percent;
frac=(widths[h]*percent-w)*100;
if(flag) xx=(17-widths[h])/2;
else xx=(17+widths[h])/2-w;
copyPixmapArea(141+xx, 93+h, w, 1, x+xx, y+h);
copyPixmapArea(141+xx, 109-h, w, 1, x+xx, y+16-h);
if(flag){
combineWithOpacity(141+xx+w, 93+h, 1, 1, x+xx+w, y+h, frac);
combineWithOpacity(141+xx+w, 109-h, 1, 1, x+xx+w, y+16-h, frac);
} else {
combineWithOpacity(141+xx-1, 93+h, 1, 1, x+xx-1, y+h, frac);
combineWithOpacity(141+xx-1, 109-h, 1, 1, x+xx-1, y+16-h, frac);
}
}
}
#endif
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