/* fuzzyflakes, Copyright (c) 2004
* Barry Dmytro <badcherry@mailc.net>
*
* ! 2004.06.10 21:05
* ! - Added support for resizing
* ! - Added a color scheme generation algorithm
* ! Thanks to <ZoeB> from #vegans@irc.blitzed.org
* ! - Added random color generation
* ! - Fixed errors in the xml config file
* ! - Cleaned up a few inconsistencies in the code
* ! - Changed the default color to #EFBEA5
*
* ! 2004.05.?? ??:??
* ! -original creation
*
* 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 <math.h>
#include "screenhack.h"
/* I have need of 1/3 and 2/3 constants later on */
#define N1_3 0.3333333333
#define N2_3 0.6666666666
typedef struct _flake_var
{
double Ticks;
double XPos, YPos;
double TrueX;
double XOffset;
double Angle;
} FlakeVariable;
/* Struct containing the atrributes to our flakes */
typedef struct _flake
{
Display *dpy;
Window window;
int Arms;
int Thickness;
int BorderThickness;
int Radius;
unsigned long BordColor;
unsigned long ForeColor;
unsigned long BackColor;
Bool RandomColors;
int Layers;
int Density;
int Delay;
int FallingSpeed;
struct _colors
{
char *Fore;
char *Bord;
char *Back;
} Colors;
/* a dynamic array containing positions of all the flakes */
FlakeVariable ***Flakes;
XGCValues GCValues;
unsigned long GCFlags;
GC GCVar;
XWindowAttributes XGWA;
struct _dbevar
{
Bool dbuf;
Pixmap b, ba, bb;
} DB;
} Flake;
/*
*This gets the pixel resource for a color: #ffffff
*/
static unsigned int
FuzzyFlakesColorResource(Flake *flake, char *Color)
{
XColor color;
if (!XParseColor(flake->dpy, flake->XGWA.colormap, Color, &color))
{
fprintf(stderr, "%s: can't parse color %s", progname, Color);
return 0;
}
if (!XAllocColor(flake->dpy, flake->XGWA.colormap, &color))
{
fprintf(stderr, "%s: can't allocate color %s", progname, Color);
return 0;
}
return color.pixel;
}
/*
* This is a great color matching algorithm that I got from
* a friend of mine on #vegans@irc.blitzed.org
* She wrote it in PHP and I ported it over to C
* her site is http://beautifulfreak.net/
*/
static int
FuzzyFlakesColorHelper(Flake *flake)
{
unsigned int iR, iG, iB;
unsigned int iR0, iG0, iB0;
unsigned int iR1, iG1, iB1;
float fR, fG, fB;
float Max = 0, Min = 0, Lig, Sat;
float Hue, Hue0, Hue1;
float f1, f2;
float fR0, fG0, fB0;
float fR1, fG1, fB1;
float nR0, nG0, nB0;
float nR1, nG1, nB1;
XColor color;
/* First convert from hex to dec */
/* while splitting up the RGB values */
if (!XParseColor(flake->dpy, flake->XGWA.colormap,
flake->Colors.Back, &color))
{
fprintf(stderr, "%s: can't parse color %s", progname,
flake->Colors.Back);
return 1;
}
iR = color.red >> 8;
iG = color.green >> 8;
iB = color.blue >> 8;
/* Convert from int to float */
fR = iR;
fG = iG;
fB = iB;
/* convert from 0-255 to 0-1 */
fR = fR / 255;
fG = fG / 255;
fB = fB / 255;
/* work out the lightness */
if (fR >= fG && fR >= fB)
Max = fR;
if (fG >= fR && fG >= fB)
Max = fG;
if (fB >= fR && fB >= fG)
Max = fB;
if (fR <= fG && fR <= fB)
Min = fR;
if (fG <= fR && fG <= fB)
Min = fG;
if (fB <= fR && fB <= fG)
Min = fB;
Lig = (Max + Min) / 2;
/* work out the saturation */
if (Max == Min)
Sat = 0;
else
{
if (Lig < 0.5)
Sat = (Max - Min) / (Max + Min);
else
Sat = (Max - Min) / (2 - Max - Min);
}
/*
* if our satration is too low we won't be
* able to see any objects
*/
if (Sat < 0.03)
{
return 1;
}
/* work out the hue */
if (fR == Max)
Hue = (fG - fB) / (Max - Min);
else if (fG == Max)
Hue = 2 + (fB - fR) / (Max - Min);
else
Hue = 4 + (fR - fG) / (Max - Min);
Hue = Hue / 6;
/* fine two equidistant hues */
Hue0 = Hue + N1_3;
if (Hue0 > 1)
Hue0 = Hue0 - 1;
Hue1 = Hue0 + N1_3;
if (Hue1 > 1)
Hue1 = Hue1 - 1;
/* convert the colors into hex codes */
if (Lig < 0.5)
f2 = Lig * (1 + Sat);
else
f2 = (Lig + Sat) - (Lig * Sat);
f1 = (2 * Lig) - f2;
fR0 = (Hue0 + 1) / 3;
fR1 = (Hue1 + 1) / 3;
fG0 = Hue0;
fG1 = Hue1;
fB0 = (Hue0 - 1) / 3;
fB1 = (Hue1 - 1) / 3;
if (fR0 < 0)
fR0 = fR0 + 1;
if (fR0 > 1)
fR0 = fR0 - 1;
if (fG0 < 0)
fG0 = fG0 + 1;
if (fG0 > 1)
fG0 = fG0 - 1;
if (fB0 < 0)
fB0 = fB0 + 1;
if (fB0 > 1)
fB0 = fB0 - 1;
if (fR1 < 0)
fR1 = fR1 + 1;
if (fR1 > 1)
fR1 = fR1 - 1;
if (fG1 < 0)
fG1 = fG1 + 1;
if (fG1 > 1)
fG1 = fG1 - 1;
if (fB1 < 0)
fB1 = fB1 + 1;
if (fB1 > 1)
fB1 = fB1 - 1;
if (6 * fR0 < 1)
nR0 = f1 + (f2 - f1) * 6 * fR0;
else if (2 * fR0 < 1)
nR0 = f2;
else if (3 * fR0 < 2)
nR0 = f1 + (f2 - f1) * (N2_3 - fR0) * 6;
else
nR0 = f1;
if (6 * fG0 < 1)
nG0 = f1 + (f2 - f1) * 6 * fG0;
else if (2 * fG0 < 1)
nG0 = f2;
else if (3 * fG0 < 2)
nG0 = f1 + (f2 - f1) * (N2_3 - fG0) * 6;
else
nG0 = f1;
if (6 * fB0 < 1)
nB0 = f1 + (f2 - f1) * 6 * fB0;
else if (2 * fB0 < 1)
nB0 = f2;
else if (3 * fB0 < 2)
nB0 = f1 + (f2 - f1) * (N2_3 - fB0) * 6;
else
nB0 = f1;
if (6 * fR1 < 1)
nR1 = f1 + (f2 - f1) * 6 * fR1;
else if (2 * fR1 < 1)
nR1 = f2;
else if (3 * fR1 < 2)
nR1 = f1 + (f2 - f1) * (N2_3 - fR1) * 6;
else
nR1 = f1;
if (6 * fG1 < 1)
nG1 = f1 + (f2 - f1) * 6 * fG1;
else if (2 * fG1 < 1)
nG1 = f2;
else if (3 * fG1 < 2)
nG1 = f1 + (f2 - f1) * (N2_3 - fG1) * 6;
else
nG1 = f1;
if (6 * fB1 < 1)
nB1 = f1 + (f2 - f1) * 6 * fB1;
else if (2 * fB1 < 1)
nB1 = f2;
else if (3 * fB1 < 2)
nB1 = f1 + (f2 - f1) * (N2_3 - fB1) * 6;
else
nB1 = f1;
/* at last convert them to a hex string */
iR0 = nR0 * 255;
iG0 = nG0 * 255;
iB0 = nB0 * 255;
iR1 = nR1 * 255;
iG1 = nG1 * 255;
iB1 = nB1 * 255;
flake->Colors.Fore = malloc(sizeof(char) * 8);
flake->Colors.Bord = malloc(sizeof(char) * 8);
sprintf(flake->Colors.Fore, "#%02X%02X%02X", iR0, iG0, iB0);
sprintf(flake->Colors.Bord, "#%02X%02X%02X", iR1, iG1, iB1);
return 0;
}
static void
FuzzyFlakesInit(Flake *flake)
{
int i, j;
XWindowAttributes xgwa;
XGetWindowAttributes(flake->dpy, flake->window, &xgwa);
flake->XGWA = xgwa;
flake->DB.b = flake->DB.ba = flake->DB.bb = 0;
flake->DB.dbuf = get_boolean_resource(flake->dpy, "doubleBuffer", "Boolean");
# ifdef HAVE_JWXYZ /* Don't second-guess Quartz's double-buffering */
flake->DB.dbuf = False;
# endif
if (flake->DB.dbuf)
{
flake->DB.ba =
XCreatePixmap(flake->dpy, flake->window, xgwa.width, xgwa.height, xgwa.depth);
flake->DB.bb =
XCreatePixmap(flake->dpy, flake->window, xgwa.width, xgwa.height, xgwa.depth);
flake->DB.b = flake->DB.ba;
}
else
{
flake->DB.b = flake->window;
}
flake->Arms = get_integer_resource(flake->dpy, "arms", "Integer");
flake->Thickness = get_integer_resource(flake->dpy, "thickness", "Integer");
flake->BorderThickness = get_integer_resource(flake->dpy, "bthickness", "Integer");
flake->Radius = get_integer_resource(flake->dpy, "radius", "Integer");
flake->Density = get_integer_resource(flake->dpy, "density", "Integer");
flake->Layers = get_integer_resource(flake->dpy, "layers", "Integer");
flake->FallingSpeed = get_integer_resource(flake->dpy, "fallingspeed", "Integer");
flake->Delay = get_integer_resource(flake->dpy, "delay", "Integer");
if (flake->RandomColors == True)
flake->RandomColors = get_boolean_resource(flake->dpy, "randomColors", "Boolean");
if (xgwa.width > 2560) { /* Retina displays */
flake->Thickness *= 2;
flake->BorderThickness *= 2;
flake->Radius *= 2;
flake->FallingSpeed *= 2;
}
if (flake->Delay < 0)
flake->Delay = 0;
if (!flake->Colors.Back)
{
flake->Colors.Back = get_string_resource(flake->dpy, "color", "Color");
if (!FuzzyFlakesColorResource(flake, flake->Colors.Back))
{
fprintf(stderr, " reverting to random\n");
flake->RandomColors = True;
}
if (flake->RandomColors)
{
if (flake->Colors.Back)
free(flake->Colors.Back);
flake->Colors.Back = malloc(sizeof(char) * 8);
sprintf(flake->Colors.Back, "#%X%X%X%X%X%X", random() % 16,
random() % 16, random() % 16, random() % 16, random() % 16,
random() % 16);
}
/*
* Here we establish our colormap based on what is in
* flake->Colors.Back
*/
if (FuzzyFlakesColorHelper(flake))
{
fprintf(stderr, " reverting to random\n");
if (flake->Colors.Back)
free(flake->Colors.Back);
flake->Colors.Back = malloc(sizeof(char) * 8);
sprintf(flake->Colors.Back, "#%X%X%X%X%X%X", random() % 16,
random() % 16, random() % 16, random() % 16, random() % 16,
random() % 16);
FuzzyFlakesColorHelper(flake);
}
flake->ForeColor = FuzzyFlakesColorResource(flake, flake->Colors.Fore);
flake->BackColor = FuzzyFlakesColorResource(flake, flake->Colors.Back);
flake->BordColor = FuzzyFlakesColorResource(flake, flake->Colors.Bord);
flake->GCValues.foreground = flake->ForeColor;
flake->GCValues.background = flake->BackColor;
flake->RandomColors = False;
}
flake->GCValues.line_width = flake->Thickness;
flake->GCValues.cap_style = CapProjecting;
flake->GCValues.join_style = JoinMiter;
flake->GCFlags |= (GCLineWidth | GCCapStyle | GCJoinStyle);
flake->GCVar =
XCreateGC(flake->dpy, flake->window, flake->GCFlags,
&flake->GCValues);
flake->Density = flake->XGWA.width / 200 * flake->Density;
flake->Flakes = malloc(sizeof(FlakeVariable **) * flake->Layers);
for (i = 1; i <= flake->Layers; i++)
{
flake->Flakes[i - 1] = malloc(sizeof(FlakeVariable *) * flake->Density);
for (j = 0; j < flake->Density; j++)
{
flake->Flakes[i - 1][j] = malloc(sizeof(FlakeVariable));
flake->Flakes[i - 1][j]->XPos = random() % flake->XGWA.width;
flake->Flakes[i - 1][j]->YPos = random() % flake->XGWA.height;
flake->Flakes[i - 1][j]->Angle = random() % 360 * (M_PI / 180);
flake->Flakes[i - 1][j]->Ticks = random() % 360;
flake->Flakes[i - 1][j]->XOffset = random() % flake->XGWA.height;
}
}
}
static void
FuzzyFlakesFreeFlake(Flake *flake)
{
int i, j;
for (i = 1; i <= flake->Layers; i++)
{
for (j = 0; j < flake->Density; j++)
{
free(flake->Flakes[i - 1][j]);
}
free(flake->Flakes[i - 1]);
}
if (flake->DB.bb) XFreePixmap(flake->dpy, flake->DB.bb);
if (flake->DB.ba) XFreePixmap(flake->dpy, flake->DB.ba);
XFreeGC (flake->dpy, flake->GCVar);
if (flake->Colors.Back) free (flake->Colors.Back);
if (flake->Colors.Fore) free (flake->Colors.Fore);
if (flake->Colors.Bord) free (flake->Colors.Bord);
}
static void
FuzzyFlakesMove(Flake *flake)
{
int i, j;
for (i = 1; i <= flake->Layers; i++)
{
for (j = 0; j < flake->Density; j++)
{
FlakeVariable *FlakeVar;
FlakeVar = flake->Flakes[i - 1][j];
FlakeVar->Ticks++;
FlakeVar->YPos =
FlakeVar->YPos + ((double)flake->FallingSpeed) / 10 / i;
FlakeVar->TrueX =
(sin
(FlakeVar->XOffset +
FlakeVar->Ticks * (M_PI / 180) * ((double)flake->FallingSpeed /
10))) * 10 + FlakeVar->XPos;
FlakeVar->Angle =
FlakeVar->Angle + 0.005 * ((double)flake->FallingSpeed / 10);
if (FlakeVar->YPos - flake->Radius > flake->XGWA.height)
{
FlakeVar->Ticks = 0;
FlakeVar->YPos = 0 - flake->Radius;
}
}
}
}
static void
FuzzyFlakesDrawFlake(Flake *flake, int XPos, int YPos, double AngleOffset, int Layer)
{
int i;
double x, y, Angle, Radius;
/* calculate the shrink factor debending on which layer we are drawing atm */
Radius = (double)(flake->Radius - Layer * 5);
/* draw the flake one arm at a time */
for (i = 1; i <= flake->Arms; i++)
{
int Diameter;
Diameter = (flake->BorderThickness * 2 + flake->Thickness) / Layer;
/* compute the angle of this arm of the flake */
Angle = ((2 * M_PI) / flake->Arms) * i + AngleOffset;
/* calculate the x and y dispositions for this arm */
y = (int)(sin(Angle) * Radius);
x = (int)(cos(Angle) * Radius);
/* draw the base for the arm */
flake->GCValues.line_width = Diameter;
XFreeGC(flake->dpy, flake->GCVar);
flake->GCVar =
XCreateGC(flake->dpy, flake->DB.b, flake->GCFlags,
&flake->GCValues);
XSetForeground(flake->dpy, flake->GCVar, flake->BordColor);
XDrawLine(flake->dpy, flake->DB.b, flake->GCVar, XPos, YPos,
XPos + x, YPos + y);
}
/* draw the flake one arm at a time */
for (i = 1; i <= flake->Arms; i++)
{
/* compute the angle of this arm of the flake */
Angle = ((2 * M_PI) / flake->Arms) * i + AngleOffset;
/* calculate the x and y dispositions for this arm */
y = (int)(sin(Angle) * Radius);
x = (int)(cos(Angle) * Radius);
/* draw the inside of the arm */
flake->GCValues.line_width = flake->Thickness / Layer;
XFreeGC(flake->dpy, flake->GCVar);
flake->GCVar =
XCreateGC(flake->dpy, flake->DB.b, flake->GCFlags,
&flake->GCValues);
XSetForeground(flake->dpy, flake->GCVar, flake->ForeColor);
XDrawLine(flake->dpy, flake->DB.b, flake->GCVar, XPos, YPos,
XPos + x, YPos + y);
}
}
static void
FuzzyFlakes(Flake *flake)
{
int i, j;
FuzzyFlakesMove(flake);
XSetForeground(flake->dpy, flake->GCVar, flake->BackColor);
XFillRectangle(flake->dpy, flake->DB.b, flake->GCVar, 0, 0,
flake->XGWA.width, flake->XGWA.height);
for (i = flake->Layers; i >= 1; i--)
{
for (j = 0; j < flake->Density; j++)
{
FuzzyFlakesDrawFlake(flake,
flake->Flakes[i - 1][j]->TrueX,
flake->Flakes[i - 1][j]->YPos,
flake->Flakes[i - 1][j]->Angle, i);
}
}
}
static void *
fuzzyflakes_init (Display *dpy, Window window)
{
Flake *flake = (Flake *) calloc (1, sizeof(*flake));
flake->dpy = dpy;
flake->window = window;
/* This is needed even if it is going to be set to false */
flake->RandomColors = True;
/* set up our colors amoung many other things */
FuzzyFlakesInit(flake);
return flake;
}
static unsigned long
fuzzyflakes_draw (Display *dpy, Window window, void *closure)
{
Flake *flake = (Flake *) closure;
FuzzyFlakes(flake);
if (flake->DB.dbuf)
{
XCopyArea(flake->dpy, flake->DB.b, flake->window,
flake->GCVar, 0, 0, flake->XGWA.width, flake->XGWA.height,
0, 0);
flake->DB.b =
(flake->DB.b == flake->DB.ba ? flake->DB.bb : flake->DB.ba);
}
return flake->Delay;
}
static void
fuzzyflakes_reshape (Display *dpy, Window window, void *closure,
unsigned int w, unsigned int h)
{
Flake *flake = (Flake *) closure;
if (flake->XGWA.width != w || flake->XGWA.height != h)
{
FuzzyFlakesFreeFlake(flake);
FuzzyFlakesInit(flake);
}
}
static Bool
fuzzyflakes_event (Display *dpy, Window window, void *closure, XEvent *event)
{
return False;
}
static void
fuzzyflakes_free (Display *dpy, Window window, void *closure)
{
Flake *flake = (Flake *) closure;
FuzzyFlakesFreeFlake(flake);
free(flake->Flakes);
free(flake);
}
static const char *fuzzyflakes_defaults[] = {
"*color: #efbea5",
"*arms: 5",
"*thickness: 10",
"*bthickness: 3",
"*radius: 20",
"*layers: 3",
"*density: 5",
"*fallingspeed: 10",
"*delay: 10000",
"*doubleBuffer: True",
"*randomColors: False",
0
};
static XrmOptionDescRec fuzzyflakes_options[] = {
{ "-color", ".color", XrmoptionSepArg, 0},
{ "-arms", ".arms", XrmoptionSepArg, 0},
{ "-thickness", ".thickness", XrmoptionSepArg, 0},
{ "-bthickness", ".bthickness", XrmoptionSepArg, 0},
{ "-radius", ".radius", XrmoptionSepArg, 0},
{ "-layers", ".layers", XrmoptionSepArg, 0},
{ "-density", ".density", XrmoptionSepArg, 0},
{ "-speed", ".fallingspeed", XrmoptionSepArg, 0},
{ "-delay", ".delay", XrmoptionSepArg, 0},
{ "-db", ".doubleBuffer", XrmoptionNoArg, "True"},
{ "-no-db", ".doubleBuffer", XrmoptionNoArg, "False"},
{ "-random-colors", ".randomColors", XrmoptionNoArg, "True"},
{ 0, 0, 0, 0}
};
XSCREENSAVER_MODULE ("FuzzyFlakes", fuzzyflakes)
