/*
This file is part of "Filter Foundry", a filter plugin for Adobe Photoshop
plugin for Adobe Photoshop
Copyright (C) 2003-5 Toby Thain, toby@telegraphics.com.au
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
*/
#ifdef MAC_ENV
#include <fp.h>
#endif
#include <math.h>
#include <stdlib.h>
#ifndef PARSERTEST
#include "ff.h"
#endif
#include "funcs.h"
#include "y.tab.h"
#define RINT //no rounding for now
//#if TARGET_API_MAC_CARBON
// this is another incompatibility between Classic stdclib and OS X stdclib
// ***FIXME: need to access real OS X includes for Carbon build
//#undef RAND_MAX
//#define RAND_MAX 0x7fffffff
//#endif
extern value_type slider[],cell[],var[],map[][0x100];
/* src(x,y,z) Channel z for the pixel at coordinates x,y */
value_type ff_src(value_type x,value_type y,value_type z){
#ifdef PARSERTEST
return 0;
#else
if(x<0)
x = 0;
else if(x>=var['X'])
x = var['X']-1;
if(y<0)
y = 0;
else if(y>=var['Y'])
y = var['Y']-1;
return z>=0 && z<var['Z'] ? ((unsigned char*)gpb->inData)[ (long)gpb->inRowBytes*y + (long)nplanes*x + z ] : 0;
#endif
}
/* rad(d,m,z) Channel z in the source image, which is m units away, at an
angle of d, from the center of the image */
value_type ff_rad(value_type d,value_type m,value_type z){
return ff_src(ff_r2x(d,m)+var['X']/2,ff_r2y(d,m)+var['Y']/2,z);
}
/* ctl(i) Value of slider i, where i is an integer between 0 and 7, inclusive */
value_type ff_ctl(value_type i){
return i>=0 && i<=7 ? slider[i] : 0;
}
/* val(i,a,b) Value of slider i, mapped onto the range a to b */
value_type ff_val(value_type i,value_type a,value_type b){
return ((long)ff_ctl(i)*(b-a))/255 + a;
}
/* map(i,n) Item n from mapping table i, where i is an integer between
0 and 3, inclusive, and n is and integer between 0 and 255,
inclusive */
value_type ff_map(value_type i,value_type n){
/*
if( i>=0 && i<=3 && n>=0 && n<=255 ){
int H = slider[i*2],L = slider[i*2+1];
return n<=L || H==L ? 0 : ( n>=H ? 255 : ((n-L)*255L)/(H-L) );
}else
return 0;
*/
// this code is from GIMP User Filter
value_type x = ff_ctl(i*2),
y = ff_ctl(i*2+1);
return abs(((long)n
*(y
-x
) / 255)+x
);
}
/* min(a,b) Lesser of a and b */
value_type ff_min(value_type a,value_type b){
return a < b ? a : b;
}
/* max(a,b) Greater of a and b */
value_type ff_max(value_type a,value_type b){
return a > b ? a : b;
}
/* abs(a) Absolute value of a */
value_type ff_abs(value_type a){
}
/* add(a,b,c) Sum of a and b, or c, whichever is lesser */
value_type ff_add(value_type a,value_type b,value_type c){
return ff_min(a+b,c);
}
/* sub(a,b,c) Difference of a and b, or c, whichever is greater */
value_type ff_sub(value_type a,value_type b,value_type c){
return ff_max(ff_dif(a,b),c);
}
/* dif(a,b) Absolute value of the difference of a and b */
value_type ff_dif(value_type a,value_type b){
}
/* rnd(a,b) Random number between a and b, inclusive */
value_type ff_rnd(value_type a,value_type b){
return (int)((abs(a
-b
)+1)*(rand()/(RAND_MAX
+1.
))) + ff_min
(a
,b
);
// return ((unsigned)rand() % (ff_dif(a,b)+1)) + ff_min(a,b);
}
/* mix(a,b,n,d) Mixture of a and b by fraction n/d, a*n/d+b*(d-n)/d */
value_type ff_mix(value_type a,value_type b,value_type n,value_type d){
return d ? ((long)a*n)/d + ((long)b*(d-n))/d : 0;
}
/* scl(a,il,ih,ol,oh) Scale a from input range (il to ih)
to output range (ol to oh) */
value_type ff_scl(value_type a,value_type il,value_type ih,
value_type ol,value_type oh){
return ih==il ? 0 : ol + ((long)(oh-ol)*(a-il))/(ih-il);
}
/* adapted from http://remus.rutgers.edu/~rhoads/Code/isqrt.c */
/* also see http://www.freaknet.org/martin/tape/gos/misc/personal/msc/sqrt/sqrt.c */
#define NBITS (sizeof(long)*8)
#define TOP2BITS(x) (x>>(NBITS-2))
unsigned long isqrt (unsigned long x)
{
int i;
unsigned long a = 0, e = 0, r = 0;
for (i=0; i < (NBITS >> 1); i++)
{
r <<= 2;
r += TOP2BITS(x);
x <<= 2;
a <<= 1;
e = (a<<1) | 1;
if (r >= e)
{
r -= e;
a++;
}
}
return a;
}
/* sqr(x) Square root of x */
value_type ff_sqr(value_type x){
return x < 0 ? 0 : isqrt(x);
}
/* sin(x) Sine function of x, where x is an integer between 0 and
1024, inclusive, and the value returned is an integer
between -512 and 512, inclusive (Windows) or -1024 and
1024, inclusive (Mac OS) */
value_type ff_sin(value_type x){
return ff_cos(x-256); //RINT(TRIGAMP*sin(FFANGLE(x)));
}
/* cos(x) Cosine function of x */
value_type ff_cos(value_type x){
return costab
[abs(x
) % COSTABSIZE
]; //RINT(TRIGAMP*cos(FFANGLE(x)));
}
/* tan(x)
Bounded tangent function of x, where x is an integer
between -256 and 256, inclusive, and the value returned is
*/
value_type ff_tan(value_type x){
return tantab[(x+256) % TANTABSIZE]; //RINT(TRIGAMP*tan(FFANGLE(x)));
}
/* r2x(d,m) x displacement of the pixel m units away, at an angle of d,
from an arbitrary center */
value_type ff_r2x(value_type d,value_type m){
return RINT
(m
*cos(FFANGLE
(d
)));
}
/* r2y(d,m) y displacement of the pixel m units away, at an angle of d,
from an arbitrary center */
value_type ff_r2y(value_type d,value_type m){
return RINT
(m
*sin(FFANGLE
(d
)));
}
/* c2d(x,y) Angle displacement of the pixel at coordinates x,y */
/* note, sign of y difference is negated, as we are dealing with top-down coordinates
angle is "observed" */
value_type ff_c2d(value_type x,value_type y){
return RINT
(TO_FFANGLE
(atan2(-y
,-x
))); /* FIXME: why must we negate x here? */
}
/* c2m(x,y) Magnitude displacement of the pixel at coordinates x,y */
value_type ff_c2m(value_type x,value_type y){
return isqrt((long)x*x + (long)y*y);
}
/* get(i) Returns the current cell value at i */
value_type ff_get(value_type i){
return i>=0 && i<=0xff ? cell[i] : 0;
}
/* put(v,i) Puts the new value v into cell i */
value_type ff_put(value_type v,value_type i){
if(i>=0 && i<=0xff)
cell[i] = v;
return v;
}
value_type ff_cnv(value_type m11,value_type m12,value_type m13,
value_type m21,value_type m22,value_type m23,
value_type m31,value_type m32,value_type m33,
value_type d ){
long total = 0;
int x=var['x'],y=var['y'];
unsigned char *p = (unsigned char*)gpb->inData + y*(long)gpb->inRowBytes + (x-1)*(long)nplanes + var['z'];
/* left column */
if(x > 0){
if(y > 0) total += m11*p[ -gpb->inRowBytes ];
total += m21*p[ 0 ];
if(y < var['Y']-1) total += m31*p[ gpb->inRowBytes ];
}
/* centre column */
p += nplanes;
if(y > 0) total += m12*p[ -gpb->inRowBytes ];
total += m22*p[ 0 ];
if(y < var['Y']-1) total += m32*p[ gpb->inRowBytes ];
/* right column */
if(x < var['X']-1){
p += nplanes;
if(y > 0) total += m13*p[ -gpb->inRowBytes ];
total += m23*p[ 0 ];
if(y < var['Y']-1) total += m33*p[ gpb->inRowBytes ];
}
return d ? total/d : 0;
}
value_type zero_val = 0;
/* predefined symbols */
struct sym_rec predefs[]={
/* functions */
{0,TOK_FN3,"src", (pfunc_type)ff_src, 0},
{0,TOK_FN3,"rad", (pfunc_type)ff_rad, 0},
{0,TOK_FN1,"ctl", (pfunc_type)ff_ctl, 0},
{0,TOK_FN3,"val", (pfunc_type)ff_val, 0},
{0,TOK_FN2,"map", (pfunc_type)ff_map, 0},
{0,TOK_FN2,"min", (pfunc_type)ff_min, 0},
{0,TOK_FN2,"max", (pfunc_type)ff_max, 0},
{0,TOK_FN1,"abs", (pfunc_type)ff_abs, 0},
{0,TOK_FN3,"add", (pfunc_type)ff_add, 0},
{0,TOK_FN3,"sub", (pfunc_type)ff_sub, 0},
{0,TOK_FN2,"dif", (pfunc_type)ff_dif, 0},
{0,TOK_FN2,"rnd", (pfunc_type)ff_rnd, 0},
{0,TOK_FN4,"mix", (pfunc_type)ff_mix, 0},
{0,TOK_FN5,"scl", (pfunc_type)ff_scl, 0},
{0,TOK_FN1,"sqr", (pfunc_type)ff_sqr, 0},
{0,TOK_FN1,"sin", (pfunc_type)ff_sin, 0},
{0,TOK_FN1,"cos", (pfunc_type)ff_cos, 0},
{0,TOK_FN1,"tan", (pfunc_type)ff_tan, 0},
{0,TOK_FN2,"r2x", (pfunc_type)ff_r2x, 0},
{0,TOK_FN2,"r2y", (pfunc_type)ff_r2y, 0},
{0,TOK_FN2,"c2d", (pfunc_type)ff_c2d, 0},
{0,TOK_FN2,"c2m", (pfunc_type)ff_c2m, 0},
{0,TOK_FN1,"get", (pfunc_type)ff_get, 0},
{0,TOK_FN2,"put", (pfunc_type)ff_put, 0},
{0,TOK_FN10,"cnv",(pfunc_type)ff_cnv, 0},
/* predefined variables (names >1 characters) */
{0,TOK_VAR,"dmin",0, &zero_val},
{0,TOK_VAR,"mmin",0, &zero_val},
{0,0,0,0,0}
};