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gstreamer/gst/goom/ifs.c
Thibault Saunier 0a6a62aa76 docs: Port all docstring to gtk-doc markdown
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/*-
* Copyright (c) 1997 by Massimino Pascal <Pascal.Massimon@ens.fr>
*
* ifs.c: modified iterated functions system for goom.
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation.
*
* This file is provided AS IS with no warranties of any kind. The author
* shall have no liability with respect to the infringement of copyrights,
* trade secrets or any patents by this file or any part thereof. In no
* event will the author be liable for any lost revenue or profits or
* other special, indirect and consequential damages.
*
* If this mode is weird and you have an old MetroX server, it is buggy.
* There is a free SuSE-enhanced MetroX X server that is fine.
*
* When shown ifs, Diana Rose (4 years old) said, "It looks like dancing."
*
* Revision History:
* 13-Dec-2003: Added some goom specific stuffs (to make ifs a VisualFX).
* 11-Apr-2002: jeko@ios-software.com: Make ifs.c system-indendant. (ifs.h added)
* 01-Nov-2000: Allocation checks
* 10-May-1997: jwz@jwz.org: turned into a standalone program.
* Made it render into an offscreen bitmap and then copy
* that onto the screen, to reduce flicker.
*/
/* #ifdef STANDALONE */
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include "goom_config.h"
#ifdef HAVE_MMX
#include "mmx.h"
#endif
#include "goom_graphic.h"
#include "ifs.h"
#include "goom_tools.h"
typedef struct _ifsPoint
{
gint32 x, y;
}
IFSPoint;
#define MODE_ifs
#define PROGCLASS "IFS"
#define HACK_INIT init_ifs
#define HACK_DRAW draw_ifs
#define ifs_opts xlockmore_opts
#define DEFAULTS "*delay: 20000 \n" \
"*ncolors: 100 \n"
#define SMOOTH_COLORS
#define LRAND() ((long) (goom_random(goomInfo->gRandom) & 0x7fffffff))
#define NRAND(n) ((int) (LRAND() % (n)))
#if RAND_MAX < 0x10000
#define MAXRAND (((float)(RAND_MAX<16)+((float)RAND_MAX)+1.0f)/127.0f)
#else
#define MAXRAND (2147483648.0/127.0) /* unsigned 1<<31 / 127.0 (cf goom_tools) as a float */
#endif
/*****************************************************/
typedef float DBL;
typedef int F_PT;
/* typedef float F_PT; */
/*****************************************************/
#define FIX 12
#define UNIT ( 1<<FIX )
#define MAX_SIMI 6
#define MAX_DEPTH_2 10
#define MAX_DEPTH_3 6
#define MAX_DEPTH_4 4
#define MAX_DEPTH_5 2
/* PREVIOUS VALUE
#define MAX_SIMI 6
* settings for a PC 120Mhz... *
#define MAX_DEPTH_2 10
#define MAX_DEPTH_3 6
#define MAX_DEPTH_4 4
#define MAX_DEPTH_5 3
*/
#define DBL_To_F_PT(x) (F_PT)( (DBL)(UNIT)*(x) )
typedef struct Similitude_Struct SIMI;
typedef struct Fractal_Struct FRACTAL;
struct Similitude_Struct
{
DBL c_x, c_y;
DBL r, r2, A, A2;
F_PT Ct, St, Ct2, St2;
F_PT Cx, Cy;
F_PT R, R2;
};
struct Fractal_Struct
{
int Nb_Simi;
SIMI Components[5 * MAX_SIMI];
int Depth, Col;
int Count, Speed;
int Width, Height, Lx, Ly;
DBL r_mean, dr_mean, dr2_mean;
int Cur_Pt, Max_Pt;
IFSPoint *Buffer1, *Buffer2;
};
typedef struct _IFS_DATA
{
FRACTAL *Root;
FRACTAL *Cur_F;
/* Used by the Trace recursive method */
IFSPoint *Buf;
int Cur_Pt;
int initalized;
} IfsData;
/*****************************************************/
static DBL
Gauss_Rand (PluginInfo * goomInfo, DBL c, DBL A, DBL S)
{
DBL y;
y = (DBL) LRAND () / MAXRAND;
y = A * (1.0 - exp (-y * y * S)) / (1.0 - exp (-S));
if (NRAND (2))
return (c + y);
return (c - y);
}
static DBL
Half_Gauss_Rand (PluginInfo * goomInfo, DBL c, DBL A, DBL S)
{
DBL y;
y = (DBL) LRAND () / MAXRAND;
y = A * (1.0 - exp (-y * y * S)) / (1.0 - exp (-S));
return (c + y);
}
static void
Random_Simis (PluginInfo * goomInfo, FRACTAL * F, SIMI * Cur, int i)
{
while (i--) {
Cur->c_x = Gauss_Rand (goomInfo, 0.0, .8, 4.0);
Cur->c_y = Gauss_Rand (goomInfo, 0.0, .8, 4.0);
Cur->r = Gauss_Rand (goomInfo, F->r_mean, F->dr_mean, 3.0);
Cur->r2 = Half_Gauss_Rand (goomInfo, 0.0, F->dr2_mean, 2.0);
Cur->A = Gauss_Rand (goomInfo, 0.0, 360.0, 4.0) * (G_PI / 180.0);
Cur->A2 = Gauss_Rand (goomInfo, 0.0, 360.0, 4.0) * (G_PI / 180.0);
Cur++;
}
}
static void
free_ifs_buffers (FRACTAL * Fractal)
{
if (Fractal->Buffer1 != NULL) {
(void) free ((void *) Fractal->Buffer1);
Fractal->Buffer1 = (IFSPoint *) NULL;
}
if (Fractal->Buffer2 != NULL) {
(void) free ((void *) Fractal->Buffer2);
Fractal->Buffer2 = (IFSPoint *) NULL;
}
}
static void
free_ifs (FRACTAL * Fractal)
{
free_ifs_buffers (Fractal);
}
/***************************************************************/
static void
init_ifs (PluginInfo * goomInfo, IfsData * data)
{
int i;
FRACTAL *Fractal;
int width = goomInfo->screen.width;
int height = goomInfo->screen.height;
if (data->Root == NULL) {
data->Root = (FRACTAL *) malloc (sizeof (FRACTAL));
if (data->Root == NULL)
return;
data->Root->Buffer1 = (IFSPoint *) NULL;
data->Root->Buffer2 = (IFSPoint *) NULL;
}
Fractal = data->Root;
free_ifs_buffers (Fractal);
i = (NRAND (4)) + 2; /* Number of centers */
switch (i) {
case 3:
Fractal->Depth = MAX_DEPTH_3;
Fractal->r_mean = .6;
Fractal->dr_mean = .4;
Fractal->dr2_mean = .3;
break;
case 4:
Fractal->Depth = MAX_DEPTH_4;
Fractal->r_mean = .5;
Fractal->dr_mean = .4;
Fractal->dr2_mean = .3;
break;
case 5:
Fractal->Depth = MAX_DEPTH_5;
Fractal->r_mean = .5;
Fractal->dr_mean = .4;
Fractal->dr2_mean = .3;
break;
default:
case 2:
Fractal->Depth = MAX_DEPTH_2;
Fractal->r_mean = .7;
Fractal->dr_mean = .3;
Fractal->dr2_mean = .4;
break;
}
Fractal->Nb_Simi = i;
Fractal->Max_Pt = Fractal->Nb_Simi - 1;
for (i = 0; i <= Fractal->Depth + 2; ++i)
Fractal->Max_Pt *= Fractal->Nb_Simi;
if ((Fractal->Buffer1 = (IFSPoint *) calloc (Fractal->Max_Pt,
sizeof (IFSPoint))) == NULL) {
free_ifs (Fractal);
return;
}
if ((Fractal->Buffer2 = (IFSPoint *) calloc (Fractal->Max_Pt,
sizeof (IFSPoint))) == NULL) {
free_ifs (Fractal);
return;
}
Fractal->Speed = 6;
Fractal->Width = width; /* modif by JeKo */
Fractal->Height = height; /* modif by JeKo */
Fractal->Cur_Pt = 0;
Fractal->Count = 0;
Fractal->Lx = (Fractal->Width - 1) / 2;
Fractal->Ly = (Fractal->Height - 1) / 2;
Fractal->Col = rand () % (width * height); /* modif by JeKo */
Random_Simis (goomInfo, Fractal, Fractal->Components, 5 * MAX_SIMI);
}
/***************************************************************/
static inline void
Transform (SIMI * Simi, F_PT xo, F_PT yo, F_PT * x, F_PT * y)
{
F_PT xx, yy;
xo = xo - Simi->Cx;
xo = (xo * Simi->R) >> FIX; /* / UNIT; */
yo = yo - Simi->Cy;
yo = (yo * Simi->R) >> FIX; /* / UNIT; */
xx = xo - Simi->Cx;
xx = (xx * Simi->R2) >> FIX; /* / UNIT; */
yy = -yo - Simi->Cy;
yy = (yy * Simi->R2) >> FIX; /* / UNIT; */
*x = ((xo * Simi->Ct - yo * Simi->St + xx * Simi->Ct2 - yy * Simi->St2)
>> FIX /* / UNIT */ ) + Simi->Cx;
*y = ((xo * Simi->St + yo * Simi->Ct + xx * Simi->St2 + yy * Simi->Ct2)
>> FIX /* / UNIT */ ) + Simi->Cy;
}
/***************************************************************/
static void
Trace (FRACTAL * F, F_PT xo, F_PT yo, IfsData * data)
{
F_PT x, y, i;
SIMI *Cur;
Cur = data->Cur_F->Components;
for (i = data->Cur_F->Nb_Simi; i; --i, Cur++) {
Transform (Cur, xo, yo, &x, &y);
data->Buf->x = F->Lx + ((x * F->Lx) >> (FIX + 1) /* /(UNIT*2) */ );
data->Buf->y = F->Ly - ((y * F->Ly) >> (FIX + 1) /* /(UNIT*2) */ );
data->Buf++;
data->Cur_Pt++;
if (F->Depth && ((x - xo) >> 4) && ((y - yo) >> 4)) {
F->Depth--;
Trace (F, x, y, data);
F->Depth++;
}
}
}
static void
Draw_Fractal (IfsData * data)
{
FRACTAL *F = data->Root;
int i, j;
F_PT x, y, xo, yo;
SIMI *Cur, *Simi;
for (Cur = F->Components, i = F->Nb_Simi; i; --i, Cur++) {
Cur->Cx = DBL_To_F_PT (Cur->c_x);
Cur->Cy = DBL_To_F_PT (Cur->c_y);
Cur->Ct = DBL_To_F_PT (cos (Cur->A));
Cur->St = DBL_To_F_PT (sin (Cur->A));
Cur->Ct2 = DBL_To_F_PT (cos (Cur->A2));
Cur->St2 = DBL_To_F_PT (sin (Cur->A2));
Cur->R = DBL_To_F_PT (Cur->r);
Cur->R2 = DBL_To_F_PT (Cur->r2);
}
data->Cur_Pt = 0;
data->Cur_F = F;
data->Buf = F->Buffer2;
for (Cur = F->Components, i = F->Nb_Simi; i; --i, Cur++) {
xo = Cur->Cx;
yo = Cur->Cy;
for (Simi = F->Components, j = F->Nb_Simi; j; --j, Simi++) {
if (Simi == Cur)
continue;
Transform (Simi, xo, yo, &x, &y);
Trace (F, x, y, data);
}
}
/* Erase previous */
F->Cur_Pt = data->Cur_Pt;
data->Buf = F->Buffer1;
F->Buffer1 = F->Buffer2;
F->Buffer2 = data->Buf;
}
static IFSPoint *
draw_ifs (PluginInfo * goomInfo, int *nbpt, IfsData * data)
{
int i;
DBL u, uu, v, vv, u0, u1, u2, u3;
SIMI *S, *S1, *S2, *S3, *S4;
FRACTAL *F;
if (data->Root == NULL)
return NULL;
F = data->Root;
if (F->Buffer1 == NULL)
return NULL;
u = (DBL) (F->Count) * (DBL) (F->Speed) / 1000.0;
uu = u * u;
v = 1.0 - u;
vv = v * v;
u0 = vv * v;
u1 = 3.0 * vv * u;
u2 = 3.0 * v * uu;
u3 = u * uu;
S = F->Components;
S1 = S + F->Nb_Simi;
S2 = S1 + F->Nb_Simi;
S3 = S2 + F->Nb_Simi;
S4 = S3 + F->Nb_Simi;
for (i = F->Nb_Simi; i; --i, S++, S1++, S2++, S3++, S4++) {
S->c_x = u0 * S1->c_x + u1 * S2->c_x + u2 * S3->c_x + u3 * S4->c_x;
S->c_y = u0 * S1->c_y + u1 * S2->c_y + u2 * S3->c_y + u3 * S4->c_y;
S->r = u0 * S1->r + u1 * S2->r + u2 * S3->r + u3 * S4->r;
S->r2 = u0 * S1->r2 + u1 * S2->r2 + u2 * S3->r2 + u3 * S4->r2;
S->A = u0 * S1->A + u1 * S2->A + u2 * S3->A + u3 * S4->A;
S->A2 = u0 * S1->A2 + u1 * S2->A2 + u2 * S3->A2 + u3 * S4->A2;
}
Draw_Fractal (data);
if (F->Count >= 1000 / F->Speed) {
S = F->Components;
S1 = S + F->Nb_Simi;
S2 = S1 + F->Nb_Simi;
S3 = S2 + F->Nb_Simi;
S4 = S3 + F->Nb_Simi;
for (i = F->Nb_Simi; i; --i, S++, S1++, S2++, S3++, S4++) {
S2->c_x = 2.0 * S4->c_x - S3->c_x;
S2->c_y = 2.0 * S4->c_y - S3->c_y;
S2->r = 2.0 * S4->r - S3->r;
S2->r2 = 2.0 * S4->r2 - S3->r2;
S2->A = 2.0 * S4->A - S3->A;
S2->A2 = 2.0 * S4->A2 - S3->A2;
*S1 = *S4;
}
Random_Simis (goomInfo, F, F->Components + 3 * F->Nb_Simi, F->Nb_Simi);
Random_Simis (goomInfo, F, F->Components + 4 * F->Nb_Simi, F->Nb_Simi);
F->Count = 0;
} else
F->Count++;
F->Col++;
(*nbpt) = data->Cur_Pt;
return F->Buffer2;
}
/***************************************************************/
static void
release_ifs (IfsData * data)
{
if (data->Root != NULL) {
free_ifs (data->Root);
(void) free ((void *) data->Root);
data->Root = (FRACTAL *) NULL;
}
}
#define RAND() goom_random(goomInfo->gRandom)
static void
ifs_update (PluginInfo * goomInfo, Pixel * data, Pixel * back, int increment,
IfsData * fx_data)
{
static unsigned int couleur = 0xc0c0c0c0;
static int v[4] = { 2, 4, 3, 2 };
static int col[4] = { 2, 4, 3, 2 };
#define MOD_MER 0
#define MOD_FEU 1
#define MOD_MERVER 2
static int mode = MOD_MERVER;
static int justChanged = 0;
static int cycle = 0;
int cycle10;
int nbpt = 0;
IFSPoint *points;
int i;
unsigned int couleursl = couleur;
int width = goomInfo->screen.width;
int height = goomInfo->screen.height;
cycle++;
if (cycle >= 80)
cycle = 0;
if (cycle < 40)
cycle10 = cycle / 10;
else
cycle10 = 7 - cycle / 10;
{
unsigned char *tmp = (unsigned char *) &couleursl;
for (i = 0; i < 4; i++) {
*tmp = (*tmp) >> cycle10;
tmp++;
}
}
points = draw_ifs (goomInfo, &nbpt, fx_data);
nbpt--;
#ifdef HAVE_MMX
movd_m2r (couleursl, mm1);
punpckldq_r2r (mm1, mm1);
for (i = 0; i < nbpt; i += increment) {
int x = points[i].x;
int y = points[i].y;
if ((x < width) && (y < height) && (x > 0) && (y > 0)) {
int pos = x + (y * width);
movd_m2r (back[pos], mm0);
paddusb_r2r (mm1, mm0);
movd_r2m (mm0, data[pos]);
}
}
emms (); /*__asm__ __volatile__ ("emms");*/
#else
for (i = 0; i < nbpt; i += increment) {
int x = (int) points[i].x & 0x7fffffff;
int y = (int) points[i].y & 0x7fffffff;
if ((x < width) && (y < height)) {
int pos = x + (int) (y * width);
int tra = 0, i = 0;
unsigned char *bra = (unsigned char *) &back[pos];
unsigned char *dra = (unsigned char *) &data[pos];
unsigned char *cra = (unsigned char *) &couleursl;
for (; i < 4; i++) {
tra = *cra;
tra += *bra;
if (tra > 255)
tra = 255;
*dra = tra;
++dra;
++cra;
++bra;
}
}
}
#endif /*MMX*/
justChanged--;
col[ALPHA] = couleur >> (ALPHA * 8) & 0xff;
col[BLEU] = couleur >> (BLEU * 8) & 0xff;
col[VERT] = couleur >> (VERT * 8) & 0xff;
col[ROUGE] = couleur >> (ROUGE * 8) & 0xff;
if (mode == MOD_MER) {
col[BLEU] += v[BLEU];
if (col[BLEU] > 255) {
col[BLEU] = 255;
v[BLEU] = -(RAND () % 4) - 1;
}
if (col[BLEU] < 32) {
col[BLEU] = 32;
v[BLEU] = (RAND () % 4) + 1;
}
col[VERT] += v[VERT];
if (col[VERT] > 200) {
col[VERT] = 200;
v[VERT] = -(RAND () % 3) - 2;
}
if (col[VERT] > col[BLEU]) {
col[VERT] = col[BLEU];
v[VERT] = v[BLEU];
}
if (col[VERT] < 32) {
col[VERT] = 32;
v[VERT] = (RAND () % 3) + 2;
}
col[ROUGE] += v[ROUGE];
if (col[ROUGE] > 64) {
col[ROUGE] = 64;
v[ROUGE] = -(RAND () % 4) - 1;
}
if (col[ROUGE] < 0) {
col[ROUGE] = 0;
v[ROUGE] = (RAND () % 4) + 1;
}
col[ALPHA] += v[ALPHA];
if (col[ALPHA] > 0) {
col[ALPHA] = 0;
v[ALPHA] = -(RAND () % 4) - 1;
}
if (col[ALPHA] < 0) {
col[ALPHA] = 0;
v[ALPHA] = (RAND () % 4) + 1;
}
if (((col[VERT] > 32) && (col[ROUGE] < col[VERT] + 40)
&& (col[VERT] < col[ROUGE] + 20) && (col[BLEU] < 64)
&& (RAND () % 20 == 0)) && (justChanged < 0)) {
mode = (RAND () % 3) ? MOD_FEU : MOD_MERVER;
justChanged = 250;
}
} else if (mode == MOD_MERVER) {
col[BLEU] += v[BLEU];
if (col[BLEU] > 128) {
col[BLEU] = 128;
v[BLEU] = -(RAND () % 4) - 1;
}
if (col[BLEU] < 16) {
col[BLEU] = 16;
v[BLEU] = (RAND () % 4) + 1;
}
col[VERT] += v[VERT];
if (col[VERT] > 200) {
col[VERT] = 200;
v[VERT] = -(RAND () % 3) - 2;
}
if (col[VERT] > col[ALPHA]) {
col[VERT] = col[ALPHA];
v[VERT] = v[ALPHA];
}
if (col[VERT] < 32) {
col[VERT] = 32;
v[VERT] = (RAND () % 3) + 2;
}
col[ROUGE] += v[ROUGE];
if (col[ROUGE] > 128) {
col[ROUGE] = 128;
v[ROUGE] = -(RAND () % 4) - 1;
}
if (col[ROUGE] < 0) {
col[ROUGE] = 0;
v[ROUGE] = (RAND () % 4) + 1;
}
col[ALPHA] += v[ALPHA];
if (col[ALPHA] > 255) {
col[ALPHA] = 255;
v[ALPHA] = -(RAND () % 4) - 1;
}
if (col[ALPHA] < 0) {
col[ALPHA] = 0;
v[ALPHA] = (RAND () % 4) + 1;
}
if (((col[VERT] > 32) && (col[ROUGE] < col[VERT] + 40)
&& (col[VERT] < col[ROUGE] + 20) && (col[BLEU] < 64)
&& (RAND () % 20 == 0)) && (justChanged < 0)) {
mode = (RAND () % 3) ? MOD_FEU : MOD_MER;
justChanged = 250;
}
} else if (mode == MOD_FEU) {
col[BLEU] += v[BLEU];
if (col[BLEU] > 64) {
col[BLEU] = 64;
v[BLEU] = -(RAND () % 4) - 1;
}
if (col[BLEU] < 0) {
col[BLEU] = 0;
v[BLEU] = (RAND () % 4) + 1;
}
col[VERT] += v[VERT];
if (col[VERT] > 200) {
col[VERT] = 200;
v[VERT] = -(RAND () % 3) - 2;
}
if (col[VERT] > col[ROUGE] + 20) {
col[VERT] = col[ROUGE] + 20;
v[VERT] = -(RAND () % 3) - 2;
v[ROUGE] = (RAND () % 4) + 1;
v[BLEU] = (RAND () % 4) + 1;
}
if (col[VERT] < 0) {
col[VERT] = 0;
v[VERT] = (RAND () % 3) + 2;
}
col[ROUGE] += v[ROUGE];
if (col[ROUGE] > 255) {
col[ROUGE] = 255;
v[ROUGE] = -(RAND () % 4) - 1;
}
if (col[ROUGE] > col[VERT] + 40) {
col[ROUGE] = col[VERT] + 40;
v[ROUGE] = -(RAND () % 4) - 1;
}
if (col[ROUGE] < 0) {
col[ROUGE] = 0;
v[ROUGE] = (RAND () % 4) + 1;
}
col[ALPHA] += v[ALPHA];
if (col[ALPHA] > 0) {
col[ALPHA] = 0;
v[ALPHA] = -(RAND () % 4) - 1;
}
if (col[ALPHA] < 0) {
col[ALPHA] = 0;
v[ALPHA] = (RAND () % 4) + 1;
}
if (((col[ROUGE] < 64) && (col[VERT] > 32) && (col[VERT] < col[BLEU])
&& (col[BLEU] > 32)
&& (RAND () % 20 == 0)) && (justChanged < 0)) {
mode = (RAND () % 2) ? MOD_MER : MOD_MERVER;
justChanged = 250;
}
}
couleur = (col[ALPHA] << (ALPHA * 8))
| (col[BLEU] << (BLEU * 8))
| (col[VERT] << (VERT * 8))
| (col[ROUGE] << (ROUGE * 8));
}
/* VISUAL_FX WRAPPER FOR IFS */
static void
ifs_vfx_apply (VisualFX * _this, Pixel * src, Pixel * dest,
PluginInfo * goomInfo)
{
IfsData *data = (IfsData *) _this->fx_data;
if (!data->initalized) {
data->initalized = 1;
init_ifs (goomInfo, data);
}
ifs_update (goomInfo, dest, src, goomInfo->update.ifs_incr, data);
/*TODO: trouver meilleur soluce pour increment (mettre le code de gestion de l'ifs dans ce fichier: ifs_vfx_apply) */
}
static void
ifs_vfx_init (VisualFX * _this, PluginInfo * info)
{
IfsData *data = (IfsData *) malloc (sizeof (IfsData));
data->Root = (FRACTAL *) NULL;
data->initalized = 0;
_this->fx_data = data;
}
static void
ifs_vfx_free (VisualFX * _this)
{
IfsData *data = (IfsData *) _this->fx_data;
release_ifs (data);
free (data);
}
void
ifs_visualfx_create (VisualFX * vfx)
{
vfx->init = ifs_vfx_init;
vfx->free = ifs_vfx_free;
vfx->apply = ifs_vfx_apply;
vfx->fx_data = NULL;
vfx->params = NULL;
}
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