/*
* Copyright (c) 2004-2009 Steve Sundstrom
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation. No representations are made about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*/
#include "screenhack.h"
#include "colors.h"
#include "hsv.h"
#include <stdio.h>
#include <math.h>
#include <sys/time.h>
/*#include <sys/utsname.h>*/
#define MODE_CREATE 0 /* init, create, then finish sleep */
#define MODE_ERASE 1 /* erase, then reset colors */
#define MODE_DRAW 2
#define DIR_NONE 0
#define DIR_UP 1
#define DIR_DOWN 2
#define DIR_LEFT 3
#define DIR_RIGHT 4
#define LINE_FORCE 1
#define LINE_NEW 2
#define LINE_BRIN 3
#define LINE_BROUT 4
#define PT_UL 0
#define PT_MP 1
#define PT_LR 2
#define PT_NL 3
#define D3D_NONE 0
#define D3D_BLOCK 1
#define D3D_NEON 2
#define D3D_TILED 3
#define TILE_RANDOM 0
#define TILE_FLAT 1
#define TILE_THIN 2
#define TILE_OUTLINE 3
#define TILE_BLOCK 4
#define TILE_NEON 5
#define TILE_TILED 6
#define BASECOLORS 30
#define SHADES 12
#define MAXCOLORS 40
#define LAYERS 4
#define PATTERNS 40
#define SHAPES 18
#define DRAWORDERS 40
#define COLORMAPS 20
#define WAVES 6
#define STRETCHES 8
struct lineStruct {
unsigned int x, y, len, obj, color, ndol;
int deo;
Bool hv;
};
struct gridStruct {
unsigned int line, hl, hr, vu, vd, dhl, dhr, dvu, dvd;
};
/* basically the same as global variables, but used to keep them in a bucket
and pass them around easier like the original C++ implementation */
struct state {
/* window values */
Display *display;
Window window;
XWindowAttributes xgwa;
GC fgc, bgc;
XColor colors[255];
/* memory values */
struct lineStruct *dline, *eline;
struct gridStruct *grid;
unsigned int *zlist, *fdol;
Bool *odi;
/* draw, erase, fill, init, line, object, z indexes */
unsigned int di, ei, fi, ii, bi, li, eli, oi, zi;
/* size variables */
int gridx, gridy; /* grid size */
unsigned int gridn;
int lwid, bwid, swid;/* line width, background width, shadow width */
int narray, max_wxh;
int elwid, elpu, egridx, egridy; /* for now */
/* fill variables */
int bnratio; /* ratio of branch lines to new lines */
int maxlen; /* maximum length of line */
int forcemax; /* make line be max possible length */
int olen; /* open length set by findopen */
int bln; /* blocking line number set by findopen, -1=edge */
/* color variables */
int ncolors; /* number of colors for screen */
int shades;
int rco[MAXCOLORS]; /* random ordering of colors for deo */
int cmap;
int layers;
Bool newcols; /* can we create new colormaps with each screen */
/* draw variables */
int dmap, emap; /* pattern by which line draw order is determined */
int dvar, evar; /* random number added to .deo to vary */
int ddir, edir; /* draw/erase in forward direction or reverse */
int lpu; /* lines drawn per update used to adjust speed */
int d3d;
int round;
int outline;
/* layered draw variables */
int pattern[LAYERS], shape[LAYERS], mix[LAYERS];
int csw[LAYERS], wsx[LAYERS], wsy[LAYERS], sec[LAYERS];
int cs1[LAYERS], cs2[LAYERS], cs3[LAYERS]; int cs4[LAYERS];
int wave[LAYERS], waveh[LAYERS], wavel[LAYERS];
int rx1[LAYERS], rx2[LAYERS], rx3[LAYERS];
int ry1[LAYERS], ry2[LAYERS], ry3[LAYERS];
/* misc variables */
int mode, sleep, speed, tile, dialog;
Bool grid_full, resized;
struct timeval time;
};
static int
_min(int a, int b)
{
if (a<=b)
return(a);
return(b);
}
static int
_max(int a, int b)
{
if (a>=b)
return(a);
return(b);
}
static int
_dist(struct state *st, int x1, int x2, int y1, int y2, int s)
{
double xd=x1-x2;
double yd=y1-y2;
switch(s) {
case 0:
return((int)sqrt(xd*xd+yd*yd));
case 1:
return((int)sqrt(xd*xd*st->cs1[0]*2+yd*yd));
case 2:
return((int)sqrt(xd*xd+yd*yd*st->cs2[0]*2));
default:
return((int)sqrt(xd*xd*st->cs1[0]/st->cs2[0]+yd*yd*st->cs3[0]/st->cs4[0]));
}
}
static int
_wave(struct state *st, int x, int h, int l, int wave)
{
l+=1;
switch(wave) {
case 0: /* cos wave*/
return((int)(cos((double)x*M_PI/l)*h));
case 1: /* double wave*/
case 2: /* double wave*/
return((int)(cos((double)x*M_PI/l)*h)+(int)(sin((double)x*M_PI/l/st->cs1[1])*h));
case 3: /* zig zag */
return(abs((x%(l*2)-l))*h/l);
case 4: /* giant zig zag */
return(abs((x%(l*4)-l*2))*h*3/l);
case 5: /* sawtooth */
return((x%(l))*h/l);
default: /* no wave */
return(0);
}
}
static int
_triangle(struct state *st, int x, int y, int rx, int ry, int t)
{
switch(t) {
case 1:
return(_min(_min(x+y+rx-(st->gridx/2),st->gridx-x+y),(st->gridy-y+(ry/2))*3/2));
case 2:
return(_min(_min(x-rx,y-ry),(rx+ry-x-y)*2/3));
case 3:
return(_min(_min(st->gridx-x-rx,y-ry),(rx+ry-st->gridx+x-y)*2/3));
case 4:
return(_min(_min(x-rx,st->gridy-y-ry),(rx+ry-x-st->gridy+y)*2/3));
}
return(_min(_min(st->gridx-x-rx,st->gridy-y-ry),(rx+ry-st->gridx+x-st->gridy+y)*2/3));
}
static void
_init_zlist(struct state *st)
{
unsigned int tmp, y, z;
st->gridx=st->xgwa.width/st->lwid;
st->gridy=st->xgwa.height/st->lwid;
if ((st->gridx <= 0) || (st->gridy <= 0)) abort();
st->gridn=st->gridx*st->gridy;
/* clear grid */
for (z=0; z<st->gridn; z++) {
st->grid[z].line=st->grid[z].hl=st->grid[z].hr=st->grid[z].vu=st->grid[z].vd=st->grid[z].dhl=st->grid[z].dhr=st->grid[z].dvu=st->grid[z].dvd=0;
st->zlist[z]=z;
}
/* rather than pull x,y points randomly and wait to hit final empy cells a
list of all points is created and mixed so empty cells do get hit last */
for (z=0; z<st->gridn; z++) {
y=random()%st->gridn;
tmp=st->zlist[y];
st->zlist[y]=st->zlist[z];
st->zlist[z]=tmp;
}
}
static void
make_color_ramp_rgb (Screen *screen, Visual *visual, Colormap cmap,
int r1, int g1, int b1, int r2, int g2, int b2,
XColor *colors, int *ncolorsP, Bool closed_p)
{
int h1, h2;
double s1, s2, v1, v2;
rgb_to_hsv(r1, g1, b1, &h1, &s1, &v1);
rgb_to_hsv(r2, g2, b2, &h2, &s2, &v2);
make_color_ramp(screen, visual, cmap, h1, s1, v1, h2, s2, v2,
colors, ncolorsP, False, True, 0);
}
static void
_init_colors(struct state *st)
{
int col[BASECOLORS];
int c1, c2, c3, h1, h2, h3;
int r1, g1, b1, r2, g2, b2, r3, g3, b3;
double s1, s2, s3, v1, v2, v3;
XColor tmp_col1[16], tmp_col2[16], tmp_col3[16];
unsigned short basecol[BASECOLORS][3]={
/* 0 dgray */ {0x3333,0x3333,0x3333},
/* 1 dbrown */ {0x6666,0x3333,0x0000},
/* 2 dred */ {0x9999,0x0000,0x0000},
/* 3 orange */ {0xFFFF,0x6666,0x0000},
/* 4 gold */ {0xFFFF,0xCCCC,0x0000},
/* 5 olive */ {0x6666,0x6666,0x0000},
/* 6 ivy */ {0x0000,0x6666,0x0000},
/* 7 dgreen */ {0x0000,0x9999,0x0000},
/* 8 bluegray */ {0x3333,0x6666,0x6666},
/* 9 dblue */ {0x0000,0x0000,0x9999},
/* 10 blue */ {0x3333,0x3333,0xFFFF},
/* 11 dpurple */ {0x6666,0x0000,0xCCCC},
/* 12 purple */ {0x6666,0x3333,0xFFFF},
/* 13 violet */ {0x9999,0x3333,0x9999},
/* 14 magenta */ {0xCCCC,0x3333,0xCCCC},
/* lights */
/* 15 gray */ {0x3333,0x3333,0x3333},
/* 16 brown */ {0x9999,0x6666,0x3333},
/* 17 tan */ {0xCCCC,0x9999,0x3333},
/* 18 red */ {0xFFFF,0x0000,0x0000},
/* 19 lorange */ {0xFFFF,0x9999,0x0000},
/* 20 yellow */ {0xFFFF,0xFFFF,0x0000},
/* 21 lolive */ {0x9999,0x9999,0x0000},
/* 22 green */ {0x3333,0xCCCC,0x0000},
/* 23 lgreen */ {0x3333,0xFFFF,0x3333},
/* 24 cyan */ {0x0000,0xCCCC,0xCCCC},
/* 25 sky */ {0x3333,0xFFFF,0xFFFF},
/* 26 marine */ {0x3333,0x6666,0xFFFF},
/* 27 lblue */ {0x3333,0xCCCC,0xFFFF},
/* 28 lpurple */ {0x9999,0x9999,0xFFFF},
/* 29 pink */ {0xFFFF,0x9999,0xFFFF}};
if (st->d3d) {
st->shades = (st->d3d==D3D_TILED) ? 5 : st->lwid/2+1;
st->ncolors=4+random()%4;
if (st->cmap>0) { /* tint the basecolors a bit */
for (c1=0; c1<BASECOLORS; c1++)
for (c2=0; c2<2; c2++)
if (!basecol[c1][c2]) {
basecol[c1][c2]+=random()%16000;
} else if (basecol[c1][c2]==0xFFFF) {
basecol[c1][c2]-=random()%16000;
} else {
basecol[c1][c2]-=8000;
basecol[c1][c2]+=random()%16000;
}
}
switch(st->cmap%4) {
case 0: /* all */
for (c1=0; c1<st->ncolors; c1++)
col[c1]=random()%BASECOLORS;
break;
case 1: /* darks */
for (c1=0; c1<st->ncolors; c1++)
col[c1]=random()%15;
break;
case 2: /* semi consecutive darks */
col[0]=random()%15;
for (c1=1; c1<st->ncolors; c1++)
col[c1]=(col[c1-1]+1+random()%2)%15;
break;
case 3: /* consecutive darks */
col[0]=random()%(15-st->ncolors);
for (c1=1; c1<st->ncolors; c1++)
col[c1]=col[c1-1]+1;
break;
}
for (c1=0; c1<st->ncolors; c1++) {
/* adjust colors already set */
for (h1=c1*st->shades-1; h1>=0; h1--)
st->colors[h1+st->shades]=st->colors[h1];
make_color_ramp_rgb(st->xgwa.screen, st->xgwa.visual, st->xgwa.colormap,
basecol[col[c1]][0], basecol[col[c1]][1], basecol[col[c1]][2],
0xFFFF, 0xFFFF, 0xFFFF, st->colors, &st->shades,
False);
}
return;
}
/* not 3d */
st->shades=1;
if (st->cmap%2) { /* basecolors */
if (random()%3) {
c1=random()%15;
c2=(c1+3+(random()%5))%15;
c3=(c2+3+(random()%5))%15;
} else {
c1=random()%BASECOLORS;
c2=(c1+5+(random()%10))%BASECOLORS;
c3=(c2+5+(random()%10))%BASECOLORS;
}
r1=basecol[c1][0];
g1=basecol[c1][1];
b1=basecol[c1][2];
r2=basecol[c2][0];
g2=basecol[c2][1];
b2=basecol[c2][2];
r3=basecol[c3][0];
g3=basecol[c3][1];
b3=basecol[c3][2];
} else { /* random rgb's */
r1=random()%65535;
g1=random()%65535;
b1=random()%65535;
r2=(r1+16384+random()%32768)%65535;
g2=(g1+16384+random()%32768)%65535;
b2=(b1+16384+random()%32768)%65535;
r3=(r2+16384+random()%32768)%65535;
g3=(g2+16384+random()%32768)%65535;
b3=(b2+16384+random()%32768)%65535;
}
switch(st->cmap) {
case 0: /* make_color_ramp color->color */
case 1:
case 2: /* make_color_ramp color->white */
case 3:
st->ncolors=5+random()%5;
if (st->cmap>1)
r2=g2=b2=0xFFFF;
make_color_ramp_rgb(st->xgwa.screen, st->xgwa.visual, st->xgwa.colormap,
r1, g1, b1, r2, g2, b2,
st->colors, &st->ncolors, random()%2);
break;
case 4: /* 3 color make_color_loop */
case 5:
case 6:
case 7:
st->ncolors=8+random()%12;
rgb_to_hsv(r1, g1, b1, &h1, &s1, &v1);
rgb_to_hsv(r2, g2, b2, &h2, &s2, &v2);
rgb_to_hsv(r3, g3, b3, &h3, &s3, &v3);
make_color_loop(st->xgwa.screen, st->xgwa.visual, st->xgwa.colormap,
h1, s1, v1, h2, s2, v2, h3, s3, v3,
st->colors, &st->ncolors, True, False);
break;
case 8: /* random smooth */
case 9:
st->ncolors=(random()%4)*6+12;
make_smooth_colormap (st->xgwa.screen, st->xgwa.visual,
st->xgwa.colormap, st->colors, &st->ncolors,
True, False, True);
break;
case 10: /* rainbow */
st->ncolors=(random()%4)*6+12;
make_uniform_colormap (st->xgwa.screen, st->xgwa.visual,
st->xgwa.colormap, st->colors, &st->ncolors,
True, False, True);
break;
case 11: /* dark to light blend */
case 12:
case 13:
case 14:
st->ncolors=7;
make_color_ramp_rgb(st->xgwa.screen, st->xgwa.visual, st->xgwa.colormap,
r1, g1, b1, 0xFFFF, 0xFFFF, 0xFFFF,
tmp_col1, &st->ncolors, False);
make_color_ramp_rgb(st->xgwa.screen, st->xgwa.visual, st->xgwa.colormap,
r2, g2, b2, 0xFFFF, 0xFFFF, 0xFFFF,
tmp_col2, &st->ncolors, False);
if (st->cmap<13) {
for(c1=0; c1<=4; c1++) {
st->colors[c1*2]=tmp_col1[c1];
st->colors[c1*2+1]=tmp_col2[c1];
}
st->ncolors=10;
} else {
make_color_ramp_rgb(st->xgwa.screen, st->xgwa.visual, st->xgwa.colormap,
r3, g3, b3, 0xFFFF, 0xFFFF, 0xFFFF,
tmp_col3, &st->ncolors, False);
for(c1=0; c1<=4; c1++) {
st->colors[c1*3]=tmp_col1[c1];
st->colors[c1*3+1]=tmp_col2[c1];
st->colors[c1*3+2]=tmp_col3[c1];
}
st->ncolors=15;
}
break;
default: /* random */
st->ncolors=(random()%4)*6+12;
make_random_colormap (st->xgwa.screen, st->xgwa.visual,
st->xgwa.colormap, st->colors, &st->ncolors,
False, True, False, True);
break;
}
/* set random color order for drawing and erasing */
for (c1=0; c1<MAXCOLORS; c1++)
st->rco[c1]=c1;
for (c1=0; c1<MAXCOLORS; c1++) {
c3=random()%MAXCOLORS;
c2=st->rco[c1];
st->rco[c1]=st->rco[c3];
st->rco[c3]=c2;
}
}
static int _comparedeo(const void *i, const void *j)
{
struct lineStruct *h1, *h2;
h1=(struct lineStruct *)i;
h2=(struct lineStruct *)j;
if (h1->deo > h2->deo)
return(1);
if (h1->deo < h2->deo)
return(-1);
return(0);
}
static int
_hv(struct state *st, int x, int y, int d1, int d2, int pn, Bool de)
{
int v1, v2, r;
switch (d1) {
case 0:
v1 = (de) ? st->egridx-x : st->gridx-x;
break;
case 1:
v1 = y;
break;
case 2:
v1 = x;
break;
default:
v1 = (de) ? st->egridy-y : st->gridy-y;
break;
}
switch (d2) {
case 0:
v2 = (de) ? st->egridx-x : st->gridx-x;
break;
case 1:
v2 = y;
break;
case 2:
v2 = x;
break;
default:
v2 = (de) ? st->egridy-y : st->gridy-y;
break;
}
r = (de) ? (st->dline[st->li].hv) ? (v1+10000)*pn : (v2+10000)*-pn :
(st->eline[st->li].hv) ? (v1+10000)*pn : (v2+10000)*-pn;
return(r);
}
static int
_getdeo(struct state *st, int x, int y, int map, int de)
{
int cr;
switch(map) {
case 0: /* horizontal one side */
return(x);
case 1: /* vertical one side */
return(y);
case 2: /* horizontal two side */
return(_min(x,st->gridx-x)+1);
case 3: /* vertical two side */
return(_min(y,st->gridy-y)+1);
case 4: /* square */
return(_max(abs(x-st->rx3[de]),abs(y-st->ry3[de]))+1);
case 5: /* two squares */
return(_min(_max(abs(x-(st->rx3[de]/2)),abs(y-st->ry3[de])),_max(abs(x-(st->gridx-(st->rx2[de]/2))),abs(y-st->ry2[de])))+1);
case 6: /* horizontal rectangle */
return(_max(abs(x-st->rx3[de]),abs(y-(st->ry3[de]))*st->cs1[de])+1);
case 7: /* vertical rectangle */
return(_max(abs(x-st->rx3[de])*st->cs1[de],abs(y-(st->ry3[de])))+1);
case 8: /* + cross */
return(_min(abs(x-st->rx3[de]),abs(y-(st->ry3[de])))+1);
case 9: /* diagonal */
return((x*3/4+y)+1);
case 10: /* opposite diagonal */
return((x*3/4+st->gridy-y)+1);
case 11: /* diamond */
return((abs(x-st->rx3[de])+abs(y-st->ry3[de]))/2+1);
case 12: /* two diamonds */
return(_min(abs(x-(st->rx3[de]/2))+abs(y-st->ry3[de]),abs(x-(st->gridx-(st->rx2[de]/2)))+abs(y-st->ry2[de]))/2+1);
case 13: /* circle */
return(_dist(st,x,st->rx3[de],y,st->ry3[de],0)+1);
case 14: /* horizontal ellipse */
return(_dist(st,x,st->rx3[de],y,st->ry3[de],1)+1);
case 15: /* vertical ellipse */
return(_dist(st,x,st->rx3[de],y,st->ry3[de],2)+1);
case 16: /* two circles */
return(_min(_dist(st,x,st->rx3[de]/2,y,st->ry3[de],0),_dist(st,x,st->gridx-(st->rx2[de]/2),y,st->ry2[de],0))+1);
case 17: /* horizontal straight wave */
return(x+_wave(st,st->gridy+y,st->csw[0]*st->cs1[0],st->csw[0]*st->cs2[0],st->wave[de]));
case 18: /* vertical straight wave */
return(y+_wave(st,st->gridx+x,st->csw[0]*st->cs1[0],st->csw[0]*st->cs2[0],st->wave[de]));
case 19: /* horizontal wavey wave */
return(x+_wave(st,st->gridy+y+((x/5)*st->edir),st->csw[de]*st->cs1[de],st->csw[de]*st->cs2[de],st->wave[de])+1);
case 20: /* vertical wavey wave */
return(y+_wave(st,st->gridx+x+((y/5)*st->edir),st->csw[de]*st->cs1[de],st->csw[de]*st->cs2[de],st->wave[de])+1);
/* no d3d for 21,22 */
case 21: /* simultaneous directional */
return(_hv(st,x,y,st->cs1[0]%2,st->cs2[0]%2,1,de));
case 22: /* reverse directional */
return(_hv(st,x,y,st->cs1[0]%2,st->cs2[0]%2,-1,de));
case 23: /* length */
if (de)
return(st->dline[st->li].len*1000+random()%5000);
else
return(st->eline[st->li].len*1000+random()%5000);
case 24: /* object */
case 25:
case 26:
case 27:
if (de)
return(st->dline[st->li].obj*100);
else
return(st->eline[st->li].obj*100);
default: /* color */
cr = (de) ? st->dline[st->li].color : st->eline[st->li].color;
if (map<34) cr=st->rco[cr];
if ((map%6<4) || (de)) { /* by color */
cr*=1000;
cr+=random()%1000;
} else if (map%6==4) { /* by color horizontaly */
cr*=st->gridx;
cr+=(x+random()%(st->gridx/2));
} else { /* by color vertically */
cr*=st->gridy;
cr+=(y+random()%(st->gridy/2));
}
return(cr);
}
return(1);
}
static void
_init_screen(struct state *st)
{
int nstr, x;
struct lineStruct *tmp;
/* malloc memory in case of resize */
if (st->resized) {
st->max_wxh=st->xgwa.width*st->xgwa.height;
if (st->dline!=NULL)
free(st->dline);
if (st->eline!=NULL)
free(st->eline);
if (st->grid!=NULL)
free(st->grid);
if (st->zlist!=NULL)
free(st->zlist);
if (st->fdol!=NULL)
free(st->fdol);
if (st->odi!=NULL)
free(st->odi);
st->narray = (st->xgwa.width+1)*(st->xgwa.height+1)/4+1;
st->dline = calloc(st->narray, sizeof(struct lineStruct));
st->eline = calloc(st->narray, sizeof(struct lineStruct));
st->grid = calloc(st->narray, sizeof(struct gridStruct));
st->zlist = calloc(st->narray, sizeof(unsigned int));
st->fdol = calloc(st->narray, sizeof(unsigned int));
st->odi = calloc(st->narray, sizeof(Bool));
if ((st->dline == NULL) || (st->eline == NULL) ||
(st->grid == NULL) || (st->zlist == NULL) ||
(st->fdol == NULL) || (st->odi == NULL)) {
fprintf(stderr, "not enough memory\n");
exit(1);
}
st->dialog = (st->xgwa.width<500) ? 1 : 0;
st->resized=False;
}
if (st->ii) {
/* swap st->dline and st->eline pointers to resort and erase */
tmp=st->eline;
st->eline=st->dline;
st->dline=tmp;
st->eli=st->li;
st->elwid=st->lwid;
st->elpu=st->lpu;
st->egridx=st->gridx;
st->egridy=st->gridy;
/* create new erase order */
for (st->li=1; st->li<=st->eli; st->li++)
st->eline[st->li].deo=(_getdeo(st,st->eline[st->li].x,st->eline[st->li].y,st->emap,0) + (random()%st->evar) + (random()%st->evar))*st->edir;
qsort(st->eline, st->eli+1, sizeof(struct lineStruct), _comparedeo);
}
st->ii++;
/* clear arrays and other counters */
st->di=st->ei=st->fi=st->li=st->oi=st->zi=0;
st->grid_full=False;
/* li starts from 1 */
st->dline[0].x=st->dline[0].y=st->dline[0].len=0;
/* to keep it first after sorting so di is never null */
st->dline[0].deo=-999999999;
/* set random screen variables */
st->lwid = (st->ii==1) ? 3 : 2+((random()%6)%4);
st->d3d = ((st->tile==TILE_FLAT) || (st->tile==TILE_THIN) ||
(st->tile==TILE_OUTLINE)) ? D3D_NONE :
(st->tile==TILE_BLOCK) ? D3D_BLOCK :
(st->tile==TILE_NEON) ? D3D_NEON :
(st->tile==TILE_TILED) ? D3D_TILED :
/* force TILE_D3D on first screen to properly load all shades */
((st->ii==1) && (!st->newcols)) ? D3D_TILED : (random()%5)%4;
/* st->d3d=D3D_BLOCK; st->lwid=2; */
st->outline = (st->tile==TILE_OUTLINE) ? 1 :
((st->tile!=TILE_RANDOM) || (random()%5)) ? 0 : 1;
st->round = (st->d3d==D3D_NEON) ? 1 :
((st->d3d==D3D_BLOCK) || (st->outline) || (random()%6)) ? 0 : 1;
if ((st->d3d) || (st->outline) || (st->round))
st->lwid+=2;
if ((!st->d3d) && (!st->round) && (!st->outline) && (st->lwid>3))
st->lwid-=2;
if (st->d3d==D3D_TILED)
st->lwid++;
if (st->tile==TILE_THIN)
st->lwid=2;
_init_zlist(st);
st->maxlen=(st->lwid>6) ? 2+(random()%4) :
(st->lwid>4) ? 2+(random()%8)%6 :
(st->lwid>2) ? 2+(random()%12)%8 : 2+(random()%15)%10;
st->bnratio = 4+(random()%4)+(random()%4);
st->forcemax = (random()%6) ? 0 : 1;
if ((st->ii==1) || (st->newcols))
_init_colors(st);
st->dmap = (st->emap+5+(random()%5))%DRAWORDERS;
st->dmap=20+random()%20;
st->dvar = (st->dmap>22) ? 100 : 10+(st->csw[0]*(random()%5));
st->ddir= (random()%2) ? 1 : -1;
st->emap = (st->dmap+10+(random()%10))%20;
st->evar = (st->emap>22) ? 100 : 10+(st->csw[0]*(random()%5));
st->edir= (random()%2) ? 1 : -1;
st->layers= (random()%2) ? 2 : (random()%2) ? 1 : (random()%2) ? 3 : 4;
st->cmap=(st->cmap+5+(random()%10))%COLORMAPS;
for (x=0; x<LAYERS; x++) {
st->pattern[x]=random()%PATTERNS;
st->shape[x]=random()%SHAPES;
st->mix[x]=random()%20;
nstr = (st->lwid==2) ? 20+random()%12 :
(st->lwid==3) ? 16+random()%8 :
(st->lwid==4) ? 12+random()%6 :
(st->lwid==5) ? 10+random()%5 :
(st->lwid==6) ? 8+random()%4 :
5+random()%5;
st->csw[x] = _max(5,st->gridy/nstr);
st->wsx[x] = (st->wsx[x]+3+(random()%3))%STRETCHES;
st->wsy[x] = (st->wsy[x]+3+(random()%3))%STRETCHES;
st->sec[x] = random()%5;
if ((!st->dialog) && (st->sec[x]<2)) st->csw[x]/=2;
st->cs1[x] = (st->dialog) ? 1+random()%3 : 2+random()%5;
st->cs2[x] = (st->dialog) ? 1+random()%3 : 2+random()%5;
st->cs3[x] = (st->dialog) ? 1+random()%3 : 2+random()%5;
st->cs4[x] = (st->dialog) ? 1+random()%3 : 2+random()%5;
st->wave[x]=random()%WAVES;
st->wavel[x]=st->csw[x]*(2+random()%6);
st->waveh[x]=st->csw[x]*(1+random()%3);
st->rx1[x]=(st->gridx/10+random()%(st->gridx*8/10));
st->ry1[x]=(st->gridy/10+random()%(st->gridy*8/10));
st->rx2[x]=(st->gridx*2/10+random()%(st->gridx*6/10));
st->ry2[x]=(st->gridy*2/10+random()%(st->gridy*6/10));
st->rx3[x]=(st->gridx*3/10+random()%(st->gridx*4/10));
st->ry3[x]=(st->gridy*3/10+random()%(st->gridy*4/10));
}
}
static int
_shape(struct state *st, int x, int y, int rx, int ry, int n)
{
switch(st->shape[n]) {
case 0: /* square/rectangle */
case 1:
case 2:
return(1+_max(abs(x-rx)*st->cs1[n]/st->cs2[n],abs(y-ry)*st->cs3[n]/st->cs4[n]));
case 3: /* diamond */
case 4:
return(1+(abs(x-rx)*st->cs1[n]/st->cs2[n]+abs(y-ry)*st->cs3[n]/st->cs4[n]));
case 5: /* 8 point star */
return(1+_min(_max(abs(x-rx),abs(y-ry))*3/2,abs(x-rx)+abs(y-ry)));
case 6: /* circle/oval */
case 7:
case 8:
return(1+_dist(st,x,rx,y,ry,st->cs1[n]));
case 9: /* black hole circle */
return(1+(st->gridx*st->gridy/(1+(_dist(st,x,rx,y,ry,st->cs2[n])))));
case 10: /* sun */
return(1+_min(abs(x-rx)*st->gridx/(abs(y-ry)+1),abs(y-ry)*st->gridx/(abs(x-rx)+1)));
case 11: /* 2 circles+inverted circle */
return(1+(_dist(st,x,rx,y,ry,st->cs1[n])*_dist(st,x,(rx*3)%st->gridx,y,(ry*5)%st->gridy,st->cs1[n])/(1+_dist(st,x,(rx*4)%st->gridx,y,(ry*7)%st->gridy,st->cs1[n]))));
case 12: /* star */
return(1+(int)sqrt(abs((x-rx)*(y-ry))));
case 13: /* centered ellipse */
return(1+_dist(st,x,rx,y,ry,0)+_dist(st,x,st->gridx-rx,y,st->gridy-ry,0));
default: /* triangle */
return(1+_triangle(st,x,y,rx,ry,st->cs4[n]));
}
return(1+_triangle(st,x,y,rx,ry,st->cs4[n]));
}
static int
_pattern(struct state *st, int x, int y, int n)
{
int v=0, ox;
ox=x;
switch(st->wsx[n]) {
case 0: /* slants */
x+=y/(1+st->cs4[n]);
break;
case 1:
x+=(st->gridy-y)/(1+st->cs4[n]);
break;
case 2: /* curves */
x+=_wave(st,y,st->gridx/(1+st->cs1[n]),st->gridy,0);
break;
case 3:
x+=_wave(st,st->gridy-y,st->gridy/(1+st->cs1[n]),st->gridy,0);
break;
case 4: /* U curves */
x+=_wave(st,y,st->cs1[n]*st->csw[n]/2,st->gridy*2/M_PI,0);
break;
case 5:
x-=_wave(st,y,st->cs1[n]*st->csw[n]/2,st->gridy*2/M_PI,0);
break;
}
switch(st->wsy[0]) {
case 0: /* slants */
y+=ox/(1+st->cs1[n]);
break;
case 1:
y+=(st->gridx-ox)/(1+st->cs1[n]);
break;
case 2: /* curves */
y+=_wave(st,ox,st->gridx/(1+st->cs1[n]),st->gridx,0);
break;
case 3:
y+=_wave(st,st->gridx-ox,st->gridx/(1+st->cs1[n]),st->gridx,0);
break;
case 4: /* U curves */
y+=_wave(st,ox,st->cs1[n]*st->csw[n]/2,st->gridy*2/M_PI,0);
break;
case 5:
y-=_wave(st,ox,st->cs1[n]*st->csw[n]/2,st->gridy*2/M_PI,0);
break;
}
switch(st->pattern[n]) {
case 0: /* horizontal stripes */
v=y;
break;
case 1: /* vertical stripes */
v=x;
break;
case 2: /* diagonal stripes */
v=(x+(y*st->cs1[n]/st->cs2[n]));
break;
case 3: /* reverse diagonal stripes */
v=(x-(y*st->cs1[n]/st->cs2[n]));
break;
case 4: /* checkerboard */
v=(y/st->csw[n]*3+x/st->csw[n])*st->csw[n];
break;
case 5: /* diagonal checkerboard */
v=((x+y)/2/st->csw[n]+(x+st->gridy-y)/2/st->csw[n]*3)*st->csw[n];
break;
case 6: /* + cross */
v=st->gridx+(_min(abs(x-st->rx3[n]),abs(y-st->ry3[n]))*2);
break;
case 7: /* double + cross */
v=_min(_min(abs(x-st->rx2[n]),abs(y-st->ry2[n])),_min(abs(x-st->rx1[n]),abs(y-st->ry1[n])))*2;
break;
case 8: /* X cross */
v=st->gridx+(_min(abs(x-st->rx3[n])*st->cs1[n]/st->cs2[n]+abs(y-st->ry2[n])*st->cs3[n]/st->cs4[n],abs(x-st->rx3[n])*st->cs1[n]/st->cs2[n]-abs(y-st->ry3[n])*st->cs3[n]/st->cs4[n])*2);
break;
case 9: /* double X cross */
v=_min(_min(abs(x-st->rx2[n])+abs(y-st->ry2[n]),abs(x-st->rx2[n])-abs(y-st->ry2[n])),_min(abs(x-st->rx1[n])+abs(y-st->ry1[n]),abs(x-st->rx1[n])-abs(y-st->ry1[n])))*2;
break;
case 10: /* horizontal stripes/waves */
v=st->gridy+(y+_wave(st,x,st->waveh[n],st->wavel[n],st->wave[n]));
break;
case 11: /* vertical stripes/waves */
v=st->gridx+(x+_wave(st,y,st->waveh[n],st->wavel[n],st->wave[n]));
break;
case 12: /* diagonal stripes/waves */
v=st->gridx+(x+(y*st->cs1[n]/st->cs2[n])+_wave(st,x,st->waveh[n],st->wavel[n],st->wave[n]));
break;
case 13: /* diagonal stripes/waves */
v=st->gridx+(x-(y*st->cs1[n]/st->cs2[n])+_wave(st,y,st->waveh[n],st->wavel[n],st->wave[n]));
break;
case 14: /* horizontal spikey waves */
v=y+(st->csw[n]*st->cs4[n]/st->cs3[n])+_wave(st,x+((y/st->cs3[n])*st->edir),st->csw[n]/2*st->cs1[n]/st->cs2[n],st->csw[n]/2*st->cs2[n]/st->cs1[n],st->wave[n]);
break;
case 15: /* vertical spikey waves */
v=x+(st->csw[n]*st->cs1[n]/st->cs2[n])+_wave(st,y+((x/st->cs3[n])*st->edir),st->csw[n]/2*st->cs1[n]/st->cs2[n],st->csw[n]/2*st->cs3[n]/st->cs4[n],st->wave[n]);
break;
case 16: /* big slanted hwaves */
v=st->gridy-y-(x*st->cs1[n]/st->cs3[n])+(st->csw[n]*st->cs1[n]*st->cs2[n]) +_wave(st,x,st->csw[n]/3*st->cs1[n]*st->cs2[n],st->csw[n]/3*st->cs3[n]*st->cs2[n],st->wave[n]);
break;
case 17: /* big slanted vwaves */
v=x-(y*st->cs1[n]/st->cs3[n])+(st->csw[n]*st->cs1[n]*st->cs2[n]) +_wave(st,y, st->csw[n]/3*st->cs1[n]*st->cs2[n], st->csw[n]/3*st->cs3[n]*st->cs2[n], st->wave[n]);
break;
case 18: /* double hwave */
v=y+(y+st->csw[n]*st->cs3[n])+_wave(st,x,st->csw[n]/3*st->cs3[n],st->csw[n]/3*st->cs2[n],st->wave[n])+_wave(st,x,st->csw[n]/3*st->cs4[n],st->csw[n]/3*st->cs1[n]*3/2,st->wave[n]);
break;
case 19: /* double vwave */
v=x+(x+st->csw[n]*st->cs1[n])+_wave(st,y,st->csw[n]/3*st->cs1[n],st->csw[n]/3*st->cs3[n],st->wave[n])+_wave(st,y,st->csw[n]/3*st->cs2[n],st->csw[n]/3*st->cs4[n]*3/2,st->wave[n]);
break;
case 20: /* one shape */
case 21:
case 22:
v=_shape(st,x, y, st->rx3[n], st->ry3[n], n);
break;
case 23: /* two shapes */
case 24:
case 25:
v=_min(_shape(st,x, y, st->rx1[n], st->ry1[n], n),_shape(st,x, y, st->rx2[n], st->ry2[n], n));
break;
case 26: /* two shapes opposites */
case 27:
v=_min(_shape(st,x, y, st->rx2[n], st->ry2[n], n),_shape(st,x, y, st->gridx-st->rx2[n], st->gridy-st->rx2[n], n));
break;
case 28: /* two shape checkerboard */
case 29:
v=((_shape(st,x, y, st->rx1[n], st->ry1[n], n)/st->csw[n])+(_shape(st,x, y, st->rx2[n], st->ry2[n], n)/st->csw[n]))*st->csw[n];
break;
case 30: /* two shape blob */
case 31:
v=(_shape(st,x, y, st->rx1[n], st->ry1[n], n)+_shape(st,x, y, st->rx2[n], st->ry2[n], n))/2;
break;
case 32: /* inverted two shape blob */
case 33:
v=(_shape(st,x, y, st->rx1[n], st->ry1[n], n)+_shape(st,st->gridx-x, st->gridy-y, st->rx1[n], st->ry1[n], n))/2;
break;
case 34: /* three shapes */
case 35:
v=_min(_shape(st,x, y, st->rx3[n], st->ry3[n], n),_min(_shape(st,x, y, st->rx1[n], st->ry1[n], n),_shape(st,x, y, st->rx2[n], st->ry2[n], n)));
break;
case 36: /* three shape blob */
case 37:
v=(_shape(st,x, y, st->rx1[n], st->ry1[n], n)+_shape(st,x, y, st->rx2[n], st->ry2[n], n)+_shape(st,x, y, st->rx3[n], st->ry3[n], n))/3;
break;
case 38: /* 4 shapes */
v=(_min(_shape(st,x, y, st->rx2[n], st->ry2[n], n),_shape(st,x, y, st->gridx-st->rx2[n], st->gridy-st->ry2[n], n)),_min(_shape(st,x, y, st->gridx-st->rx2[n], st->ry2[n], n),_shape(st,x, y, st->rx2[n], st->gridy-st->ry2[n], n)));
break;
case 39: /* four rainbows */
v=(_min(_shape(st,x, y, st->gridx-st->rx2[n]/2, st->csw[n], n),_shape(st,x, y, st->csw[n], st->ry2[n]/2, n)),_min(_shape(st,x, y, st->rx2[n]/2, st->gridy-st->csw[n], n),_shape(st,x, y, st->gridx-st->csw[n], st->gridy-(st->ry2[n]/2), n)));
break;
}
/* stretch or contract stripe */
switch(st->sec[n]) {
case 0:
v=(int)sqrt((int)sqrt(abs(v)*st->gridx)*st->gridx);
break;
case 1:
v=((int)pow(v,2)/st->gridx);
break;
}
return (abs(v));
}
static int
_getcolor(struct state *st, int x, int y)
{
int n, cv[LAYERS];
cv[0] = 0;
for (n=0; n<st->layers; n++) {
cv[n]=_pattern(st,x,y,n);
/* first wave/shape */
cv[0] = (!n) ? cv[0]/st->csw[0] :
/* checkerboard+1 */
(st->mix[n]<5) ? (cv[0]*st->csw[0]+cv[n])/st->csw[n] :
/* checkerboard+ncol/2 */
(st->mix[n]<12) ? cv[0]+(cv[n]/st->csw[n]*st->ncolors/2) :
/* add mix */
(st->mix[n]<16) ? cv[0]+(cv[n]/st->csw[n]) :
/* subtract mix */
(st->mix[n]<18) ? cv[0]-(cv[n]/st->csw[n]) :
/* r to l morph mix */
(st->mix[n]==18) ? ((cv[0]*x)+(cv[n]*(st->gridx-x)/st->csw[n]))/st->gridx :
/* u to d morph mix */
((cv[0]*y)+(cv[n]*(st->gridy-y)/st->csw[n]))/st->gridy;
}
return(cv[0]);
}
/* return value=line direction
st->olen=open space to edge or next blocking line
st->bln=blocking line number or -1 if edge blocks */
static int
_findopen(struct state *st, int x, int y, int z)
{
int dir, od[4], no=0;
if (((st->grid[z].hl) || (st->grid[z].hr)) &&
((st->grid[z].vu) || (st->grid[z].vd)))
return(DIR_NONE);
if ((z>st->gridx) && (!st->grid[z].hl) && (!st->grid[z].hr) &&
(!st->grid[z-st->gridx].line)) {
od[no]=DIR_UP;
no++;
}
if ((z<st->gridn-st->gridx) && (!st->grid[z].hl) &&
(!st->grid[z].hr) && (!st->grid[z+st->gridx].line)) {
od[no]=DIR_DOWN;
no++;
}
if ((x) && (!st->grid[z].hl) && (!st->grid[z].hr) &&
(!st->grid[z-1].line)) {
od[no]=DIR_LEFT;
no++;
}
if (((z+1)%st->gridx) && (!st->grid[z].hl) && (!st->grid[z].hr) &&
(!st->grid[z+1].line)) {
od[no]=DIR_RIGHT;
no++;
}
if (!no)
return(DIR_NONE);
dir=od[random()%no];
st->olen=st->bln=0;
while ((st->olen<=st->maxlen) && (!st->bln)) {
st->olen++;
if (dir==DIR_UP)
st->bln = (y-st->olen<0) ? -1 :
st->grid[z-(st->olen*st->gridx)].line;
if (dir==DIR_DOWN)
st->bln = (y+st->olen>=st->gridy) ? -1 :
st->grid[z+(st->olen*st->gridx)].line;
if (dir==DIR_LEFT)
st->bln = (x-st->olen<0) ? -1 :
st->grid[z-st->olen].line;
if (dir==DIR_RIGHT)
st->bln = (x+st->olen>=st->gridx) ? -1 :
st->grid[z+st->olen].line;
}
st->olen--;
return(dir);
}
static void
_fillgrid(struct state *st)
{
unsigned int gridc, n, add;
gridc=st->gridx*st->dline[st->li].y+st->dline[st->li].x;
add = (st->dline[st->li].hv) ? 1 : st->gridx;
for (n=0; n<=st->dline[st->li].len; n++) {
if (n)
gridc+=add;
if (!st->grid[gridc].line) {
st->fi++;
st->grid[gridc].line=st->li;
}
if (st->dline[st->li].hv) {
if (n)
st->grid[gridc].hr=st->li;
if (n<st->dline[st->li].len)
st->grid[gridc].hl=st->li;
} else {
if (n)
st->grid[gridc].vd=st->li;
if (n<st->dline[st->li].len)
st->grid[gridc].vu=st->li;
}
if (st->fi>=st->gridn) {
st->grid_full=True;
return;
}
}
}
static void
_newline(struct state *st)
{
int bl, bz, dir, lt, x, y, z;
bl=0;
z=st->zlist[st->zi];
x=z%st->gridx;
y=z/st->gridx;
st->zi++;
dir=_findopen(st,x,y,z);
if (!st->grid[z].line) {
/* this is an empty space, make a new line unless nothing is open around it */
if (dir==DIR_NONE) {
/* nothing is open, force a len 1 branch in any direction */
lt=LINE_FORCE;
while ((dir==DIR_NONE) ||
((dir==DIR_UP) && (!y)) ||
((dir==DIR_DOWN) && (y+1==st->gridy)) ||
((dir==DIR_LEFT) && (!x)) ||
((dir==DIR_RIGHT) && (x+1==st->gridx))) {
dir=random()%4;
}
bz = (dir==DIR_UP) ? z-st->gridx : (dir==DIR_DOWN) ? z+st->gridx : (dir==DIR_LEFT) ? z-1 : z+1;
bl = st->grid[bz].line;
} else if ((st->bnratio>1) && (st->bln>0) &&
(st->olen<st->maxlen) && (random()%st->bnratio)) {
/* branch into blocking line */
lt=LINE_BRIN;
bl = st->bln;
} else {
/* make a new line and new object */
lt=LINE_NEW;
st->oi++;
}
} else {
/* this is a filled space, make a branch unless nothing is open around it */
if (dir==DIR_NONE)
return;
/* make a branch out of this line */
lt=LINE_BROUT;
bl=st->grid[z].line;
}
st->li++;
st->dline[st->li].len = (lt==LINE_FORCE) ? 1 : (lt==LINE_BRIN) ?
st->olen+1 : (!st->forcemax) ? st->olen : 1+random()%st->olen;
st->dline[st->li].x=x;
if (dir==DIR_LEFT)
st->dline[st->li].x-=st->dline[st->li].len;
st->dline[st->li].y=y;
if (dir==DIR_UP)
st->dline[st->li].y-=st->dline[st->li].len;
st->dline[st->li].hv = ((dir==DIR_LEFT) || (dir==DIR_RIGHT)) ?
True : False;
st->dline[st->li].obj = (lt==LINE_NEW) ? st->oi :
st->dline[bl].obj;
if (lt==LINE_NEW) {
int color = (_getcolor(st,x,y))%st->ncolors;
if (color < 0) color += st->ncolors;
st->dline[st->li].color = color;
} else {
st->dline[st->li].color = st->dline[bl].color;
}
st->dline[st->li].deo=(_getdeo(st,x,y,st->dmap,1) +
(random()%st->dvar) + (random()%st->dvar))*st->ddir;
st->dline[st->li].ndol=0;
_fillgrid(st);
}
static void
_create_screen(struct state *st)
{
while(!st->grid_full)
_newline(st);
qsort(st->dline, st->li+1, sizeof(struct lineStruct), _comparedeo);
/*st->lpu=st->li/20/((6-st->speed)*3);
Used to use a computed lpu, lines per update to control draw speed
draw 1/lpu of the lines before each XSync which takes a split second
the higher the lpu, the quicker the screen draws. This worked somewhat
after the 4->5 update, however with the Mac updating so much more slowly,
values tuned for it draw the screen in a blink on Linux. Therefore we
draw 1/200th of the screen with each update and sleep, if necessary */
st->lpu = (st->dialog) ? st->li/50 : st->li/200;
if (!st->lpu) st->lpu = 1;
st->bi=1;
st->mode=MODE_ERASE;
}
static void
_fill_outline(struct state *st, int di)
{
int x, y, h, w;
if (!di)
return;
x=st->dline[di].x*st->lwid+1;
y=st->dline[di].y*st->lwid+1;
if (st->dline[di].hv) {
w=(st->dline[di].len+1)*st->lwid-3;
h=st->lwid-3;
} else {
w=st->lwid-3;
h=(st->dline[di].len+1)*st->lwid-3;
}
XFillRectangle (st->display, st->window, st->bgc, x, y, w, h);
}
static void
_XFillRectangle(struct state *st, int di, int adj)
{
int a, b, x, y, w, h;
x=st->dline[di].x*st->lwid;
y=st->dline[di].y*st->lwid;
if (st->dline[di].hv) {
w=(st->dline[di].len+1)*st->lwid-1;
h=st->lwid-1;
} else {
w=st->lwid-1;
h=(st->dline[di].len+1)*st->lwid-1;
}
switch (st->d3d) {
case D3D_NEON:
x+=adj;
y+=adj;
w-=adj*2;
h-=adj*2;
break;
case D3D_BLOCK:
x+=adj;
y+=adj;
w-=st->lwid/2-1;
h-=st->lwid/2-1;
break;
}
if (!st->round) {
XFillRectangle(st->display, st->window, st->fgc, x, y, w, h);
} else {
if (h<st->lwid) { /* horizontal */
a=(h-1)/2;
for (b=0; b<=a; b++)
XFillRectangle(st->display, st->window, st->fgc,
x+b, y+a-b, w-b*2, h-((a-b)*2));
} else { /* vertical */
a=(w-1)/2;
for (b=0; b<=a; b++)
XFillRectangle(st->display, st->window, st->fgc,
x+a-b, y+b, w-((a-b)*2), h-b*2);
}
}
}
static void
_XFillTriangle(struct state *st, int color, int x1, int y1, int x2, int y2,
int x3, int y3)
{
XPoint points[3];
points[0].x=x1;
points[0].y=y1;
points[1].x=x2;
points[1].y=y2;
points[2].x=x3;
points[2].y=y3;
XSetForeground(st->display, st->fgc, st->colors[color].pixel);
XFillPolygon (st->display, st->window, st->fgc, points, 3, Convex,
CoordModeOrigin);
}
static void
_XFillPolygon4(struct state *st, int color, int x1, int y1, int x2, int y2,
int x3, int y3, int x4, int y4)
{
XPoint points[4];
points[0].x=x1;
points[0].y=y1;
points[1].x=x2;
points[1].y=y2;
points[2].x=x3;
points[2].y=y3;
points[3].x=x4;
points[3].y=y4;
XSetForeground(st->display, st->fgc, st->colors[color].pixel);
XFillPolygon (st->display, st->window, st->fgc, points, 4, Convex,
CoordModeOrigin);
}
static void
_draw_tiled(struct state *st, int color)
{
int a, c, d, x, y, z, m1, m2, lr, nl, w, h;
a = (st->dline[st->di].hv) ? 1 : st->gridx;
z = st->dline[st->di].y*st->gridx+st->dline[st->di].x;
m1 = (st->lwid-1)/2;
m2 = st->lwid/2;
lr = st->lwid-1;
nl = st->lwid;
/* draw tiles one grid cell at a time */
for (c=0; c<=st->dline[st->di].len; c++) {
if (st->dline[st->di].hv) {
x = (st->dline[st->di].x+c)*st->lwid;
y = st->dline[st->di].y*st->lwid;
if (c)
st->grid[z].dhr=st->di;
if (c<st->dline[st->di].len)
st->grid[z].dhl=st->di;
} else {
x = st->dline[st->di].x*st->lwid;
y = (st->dline[st->di].y+c)*st->lwid;
if (c)
st->grid[z].dvd=st->di;
if (c<st->dline[st->di].len)
st->grid[z].dvu=st->di;
}
d=0;
if (st->grid[z].dhl)
d+=8;
if (st->grid[z].dhr)
d+=4;
if (st->grid[z].dvu)
d+=2;
if (st->grid[z].dvd)
d++;
/* draw line base */
switch (d) {
case 1:
case 2: /* vertical */
case 3:
case 5:
case 6:
case 7:
case 11:
case 15:
h = ((d==1) || (d==5)) ? lr : nl;
XSetForeground(st->display, st->fgc,
st->colors[color].pixel);
XFillRectangle (st->display, st->window, st->fgc,
x, y, m2, h);
XSetForeground(st->display, st->fgc,
st->colors[color+3].pixel);
XFillRectangle (st->display, st->window, st->fgc,
x+m2, y, m1, h);
break;
case 4:
case 8: /* horizontal */
case 9:
case 10:
case 12:
case 13:
case 14:
w = (d==4) ? lr : nl;
XSetForeground(st->display, st->fgc,
st->colors[color+1].pixel);
XFillRectangle (st->display, st->window, st->fgc,
x, y, w, m2);
XSetForeground(st->display, st->fgc,
st->colors[color+2].pixel);
XFillRectangle (st->display, st->window, st->fgc,
x, y+m2, w, m1);
break;
}
/* draw angles */
switch(d) {
case 1: /* bottom end ^ */
_XFillTriangle(st,color+2, x, y+lr, x+lr, y+lr, x+m2, y+m2);
break;
case 2: /* top end \/ */
_XFillTriangle(st,color+1, x, y, x+lr, y, x+m2, y+m2);
break;
case 4: /* right end < */
_XFillTriangle(st,color+3, x+lr, y, x+lr, y+lr, x+m2, y+m2);
break;
case 5: /* LR corner */
_XFillTriangle(st,color+1, x, y+m2, x+m2, y+m2, x, y);
_XFillPolygon4(st,color+2, x, y+m2, x+m2, y+m2, x+lr, y+lr, x, y+lr);
break;
case 6: /* UR corner */
_XFillPolygon4(st,color+1, x, y+m2, x+m2, y+m2, x+lr, y, x, y);
_XFillTriangle(st,color+2, x, y+m2, x+m2, y+m2, x, y+lr);
break;
case 7: /* T > into line */
_XFillTriangle(st,color+1, x, y+m2, x+m2, y+m2, x, y);
_XFillTriangle(st,color+2, x, y+m2, x+m2, y+m2, x, y+lr);
break;
case 8: /* left end > */
_XFillTriangle(st,color, x, y, x, y+lr, x+m2, y+m2);
break;
case 9: /* LL corner */
_XFillPolygon4(st,color, x+m2, y, x+m2, y+m2, x, y+lr, x, y);
_XFillTriangle(st,color+3, x+m2, y, x+m2, y+m2, x+lr, y);
break;
case 10: /* UL corner */
_XFillPolygon4(st,color, x+m2, y+nl, x+m2, y+m2, x, y, x, y+nl);
_XFillPolygon4(st,color+3, x+m2, y+nl, x+m2, y+m2, x+lr, y+lr, x+lr, y+nl);
break;
case 11: /* T < into line */
_XFillPolygon4(st,color+1, x+nl, y+m2, x+m2, y+m2, x+lr, y, x+nl, y);
_XFillPolygon4(st,color+2, x+nl, y+m2, x+m2, y+m2, x+lr, y+lr, x+nl, y+lr);
break;
case 13: /* T \/ into line */
_XFillTriangle(st,color, x+m2, y, x+m2, y+m2, x, y);
_XFillTriangle(st,color+3, x+m2, y, x+m2, y+m2, x+lr, y);
break;
case 14: /* T ^ into line */
_XFillPolygon4(st,color, x+m2, y+nl, x+m2, y+m2, x, y+lr, x, y+nl);
_XFillPolygon4(st,color+3, x+m2, y+nl, x+m2, y+m2, x+lr, y+lr, x+lr, y+nl);
break;
case 15: /* X intersection */
_XFillTriangle(st,color+1, x, y+m2, x+m2, y+m2, x, y);
_XFillTriangle(st,color+2, x, y+m2, x+m2, y+m2, x, y+lr);
_XFillPolygon4(st,color+1, x+nl, y+m2, x+m2, y+m2, x+lr, y, x+nl, y);
_XFillPolygon4(st,color+2, x+nl, y+m2, x+m2, y+m2, x+lr, y+lr, x+nl, y+lr);
break;
}
z+=a;
}
}
static long
_mselapsed(struct state *st)
{
struct timeval t;
gettimeofday(&t, NULL);
t.tv_sec -= st->time.tv_sec;
t.tv_usec -= st->time.tv_usec;
return ((long)t.tv_sec*1000000+t.tv_usec);
}
static void
_draw_lines(struct state *st)
{
int n, z, a, color, sh, di;
if (st->bi==1)
for (a=0; a<=st->oi; a++)
st->fdol[a]=0;
for (st->di=st->bi; st->di<_min(st->li+1,st->bi+st->lpu); st->di++) {
color=(st->dline[st->di].color%st->ncolors)*st->shades;
XSetForeground(st->display, st->fgc, st->colors[color].pixel);
switch (st->d3d) {
case D3D_NEON:
st->dline[st->di].ndol=st->fdol[st->dline[st->di].obj];
st->fdol[st->dline[st->di].obj]=st->di;
for (sh=0; sh<st->lwid/2; sh++) {
XSetForeground(st->display, st->fgc,
st->colors[color+sh].pixel);
di=st->di;
while(di>0) {
_XFillRectangle(st,di,sh);
di=st->dline[di].ndol;
}
}
break;
case D3D_BLOCK:
st->dline[st->di].ndol=st->fdol[st->dline[st->di].obj];
st->fdol[st->dline[st->di].obj]=st->di;
for (sh=0; sh<st->lwid/2; sh++) {
XSetForeground(st->display, st->fgc,
st->colors[color+(st->lwid/2)-sh-1].pixel);
di=st->di;
while(di>0) {
_XFillRectangle(st,di,sh);
di=st->dline[di].ndol;
}
}
break;
case D3D_TILED:
_draw_tiled(st,color);
break;
default: /* D3D_NONE */
_XFillRectangle(st,st->di,0);
if (st->outline) {
_fill_outline(st, st->di);
z=st->dline[st->di].y*st->gridx+st->dline[st->di].x;
a = (st->dline[st->di].hv) ? 1 : st->gridx;
for (n=0; n<=st->dline[st->di].len; n++) {
_fill_outline(st, st->grid[z].dhl);
_fill_outline(st, st->grid[z].dhr);
_fill_outline(st, st->grid[z].dvu);
_fill_outline(st, st->grid[z].dvd);
if (st->dline[st->di].hv) {
if (n)
st->grid[z].dhr=st->di;
if (n<st->dline[st->di].len)
st->grid[z].dhl=st->di;
} else {
if (n)
st->grid[z].dvd=st->di;
if (n<st->dline[st->di].len)
st->grid[z].dvu=st->di;
}
z+=a;
}
}
break;
}
}
if (st->di>st->li) {
st->bi=1;
st->mode=MODE_CREATE;
} else {
st->bi+=st->lpu;
}
}
static void
_erase_lines(struct state *st)
{
if (!st->ii)
return;
for (st->di=st->bi; st->di<_min(st->eli+1,st->bi+st->elpu); st->di++) {
if (st->eline[st->di].hv) {
XFillRectangle (st->display, st->window, st->bgc,
st->eline[st->di].x*st->elwid,
st->eline[st->di].y*st->elwid,
(st->eline[st->di].len+1)*st->elwid, st->elwid);
} else {
XFillRectangle (st->display, st->window, st->bgc,
st->eline[st->di].x*st->elwid,
st->eline[st->di].y*st->elwid,
st->elwid, (st->eline[st->di].len+1)*st->elwid);
}
if (st->di==st->eli) /* clear just in case */
XFillRectangle(st->display, st->window, st->bgc, 0, 0,
st->xgwa.width, st->xgwa.height);
}
if (st->di>st->eli) {
st->bi=1;
if (st->resized) {
st->mode=MODE_CREATE;
} else {
st->mode=MODE_DRAW;
}
} else {
st->bi+=st->elpu;
}
}
static void *
abstractile_init(Display *display, Window window)
{
struct state *st = (struct state *) calloc (1, sizeof(*st));
XGCValues gcv;
/* struct utsname os;*/
char *tile = get_string_resource(display, "tile", "Tile");
if (tile && !strcmp(tile, "random")) st->tile = TILE_RANDOM;
else if (tile && !strcmp(tile, "flat")) st->tile = TILE_FLAT;
else if (tile && !strcmp(tile, "thin")) st->tile = TILE_THIN;
else if (tile && !strcmp(tile, "outline")) st->tile = TILE_OUTLINE;
else if (tile && !strcmp(tile, "block")) st->tile = TILE_BLOCK;
else if (tile && !strcmp(tile, "neon")) st->tile = TILE_NEON;
else if (tile && !strcmp(tile, "tiled")) st->tile = TILE_TILED;
else {
if (tile && *tile && !!strcmp(tile, "random"))
fprintf(stderr, "%s: unknown tile option %s\n", progname, tile);
st->tile = TILE_RANDOM;
}
st->speed = get_integer_resource(display, "speed", "Integer");
if (st->speed < 0) st->speed = 0;
if (st->speed > 5) st->speed = 5;
st->sleep = get_integer_resource(display, "sleep", "Integer");
if (st->sleep < 0) st->sleep = 0;
if (st->sleep > 60) st->sleep = 60;
st->display=display;
st->window=window;
/* get screen size and create Graphics Contexts */
XGetWindowAttributes (display, window, &st->xgwa);
gcv.foreground = get_pixel_resource(display, st->xgwa.colormap,
"foreground", "Foreground");
st->fgc = XCreateGC (display, window, GCForeground, &gcv);
gcv.foreground = get_pixel_resource(display, st->xgwa.colormap,
"background", "Background");
st->bgc = XCreateGC (display, window, GCForeground, &gcv);
/* Um, no. This is obscene. -jwz.
uname(&os);
st->newcols=((!strcmp(os.sysname,"Linux")) || (!strcmp(os.sysname,"Darwin")))
? True : False;
*/
st->newcols=False;
st->mode=MODE_CREATE;
st->ii=0;
st->resized=True;
return st;
}
static unsigned long
abstractile_draw (Display *dpy, Window window, void *closure)
{
struct state *st = (struct state *) closure;
int mse, usleep;
gettimeofday(&st->time, NULL);
/* If the window is too small, do nothing, sorry! */
if (st->xgwa.width > 20 && st->xgwa.height > 20) {
switch (st->mode) {
case MODE_CREATE:
_init_screen(st);
_create_screen(st);
break;
case MODE_ERASE:
_erase_lines(st);
break;
case MODE_DRAW:
_draw_lines(st);
break;
}
}
mse=_mselapsed(st);
usleep = ((!st->ii) && (st->mode==MODE_CREATE)) ? 0 :
(st->mode==MODE_CREATE) ? st->sleep*1000000-mse :
/* speed=0-5, goal is 10,8,6,4,2,0 sec normal and 5,4,3,2,1,0 dialog */
(5-st->speed)*(2-st->dialog)*100000/st->lpu-mse;
if (usleep>=0)
return usleep;
return 0;
}
static void
abstractile_reshape (Display *dpy, Window window, void *closure,
unsigned int w, unsigned int h)
{
struct state *st = (struct state *) closure;
st->xgwa.width = w;
st->xgwa.height = h;
if (w*h>st->max_wxh)
st->resized=True;
}
static Bool
abstractile_event (Display *dpy, Window window, void *closure, XEvent *event)
{
struct state *st = (struct state *) closure;
if (screenhack_event_helper (dpy, window, event))
{
st->mode=MODE_CREATE;
return True;
}
return False;
}
static void
abstractile_free (Display *dpy, Window window, void *closure)
{
struct state *st = (struct state *) closure;
free (st);
}
static const char *abstractile_defaults [] = {
".background: black",
".foreground: white",
"*fpsSolid: true",
"*sleep: 3",
"*speed: 3",
"*tile: random",
#ifdef HAVE_MOBILE
"*ignoreRotation: True",
#endif
0
};
static XrmOptionDescRec abstractile_options [] = {
{ "-sleep", ".sleep", XrmoptionSepArg, 0 },
{ "-speed", ".speed", XrmoptionSepArg, 0 },
{ "-tile", ".tile", XrmoptionSepArg, 0 },
{ 0, 0, 0, 0 }
};
XSCREENSAVER_MODULE ("Abstractile", abstractile)