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fceux/palette.cpp

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/* FCE Ultra - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 2002,2003 Xodnizel
*
* 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
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "types.h"
#include "fceu.h"
#include "general.h"
#include "driver.h"
#include "palette.h"
#include "palettes/palettes.h"
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
static int ntsccol=0;
static int ntsctint=46+10;
static int ntschue=72;
/* These are dynamically filled/generated palettes: */
pal palettei[64]; // Custom palette for an individual game.
pal palettec[64]; // Custom "global" palette.
pal paletten[64]; // Mathematically generated palette.
static void CalculatePalette(void);
static void ChoosePalette(void);
static void WritePalette(void);
uint8 pale=0;
pal *palo;
static pal *palpoint[8]=
{
palette,
rp2c04001,
rp2c04002,
rp2c04003,
rp2c05004,
};
void FCEUI_SetPaletteArray(uint8 *pal)
{
if(!pal)
palpoint[0]=palette;
else
{
int x;
palpoint[0]=palettec;
for(x=0;x<64;x++)
{
palpoint[0][x].r=*((uint8 *)pal+x+x+x);
palpoint[0][x].g=*((uint8 *)pal+x+x+x+1);
palpoint[0][x].b=*((uint8 *)pal+x+x+x+2);
}
}
FCEU_ResetPalette();
}
void FCEUI_SetNTSCTH(int n, int tint, int hue)
{
ntsctint=tint;
ntschue=hue;
ntsccol=n;
FCEU_ResetPalette();
}
static uint8 lastd=0;
void SetNESDeemph(uint8 d, int force)
{
static uint16 rtmul[7]={32768*1.239,32768*.794,32768*1.019,32768*.905,32768*1.023,32768*.741,32768*.75};
static uint16 gtmul[7]={32768*.915,32768*1.086,32768*.98,32768*1.026,32768*.908,32768*.987,32768*.75};
static uint16 btmul[7]={32768*.743,32768*.882,32768*.653,32768*1.277,32768*.979,32768*.101,32768*.75};
uint32 r,g,b;
int x;
/* If it's not forced(only forced when the palette changes),
don't waste cpu time if the same deemphasis bits are set as the last call.
*/
if(!force)
{
if(d==lastd)
return;
}
else /* Only set this when palette has changed. */
{
r=rtmul[6];
g=rtmul[6];
b=rtmul[6];
for(x=0;x<0x40;x++)
{
uint32 m,n,o;
m=palo[x].r;
n=palo[x].g;
o=palo[x].b;
m=(m*r)>>15;
n=(n*g)>>15;
o=(o*b)>>15;
if(m>0xff) m=0xff;
if(n>0xff) n=0xff;
if(o>0xff) o=0xff;
FCEUD_SetPalette(x|0xC0,m,n,o);
}
}
if(!d) return; /* No deemphasis, so return. */
r=rtmul[d-1];
g=gtmul[d-1];
b=btmul[d-1];
for(x=0;x<0x40;x++)
{
uint32 m,n,o;
m=palo[x].r;
n=palo[x].g;
o=palo[x].b;
m=(m*r)>>15;
n=(n*g)>>15;
o=(o*b)>>15;
if(m>0xff) m=0xff;
if(n>0xff) n=0xff;
if(o>0xff) o=0xff;
FCEUD_SetPalette(x|0x40,m,n,o);
}
lastd=d;
}
/* Converted from Kevin Horton's qbasic palette generator. */
static void CalculatePalette(void)
{
int x,z;
int r,g,b;
double s,luma,theta;
static uint8 cols[16]={0,24,21,18,15,12,9,6,3,0,33,30,27,0,0,0};
static uint8 br1[4]={6,9,12,12};
static double br2[4]={.29,.45,.73,.9};
static double br3[4]={0,.24,.47,.77};
for(x=0;x<=3;x++)
for(z=0;z<16;z++)
{
s=(double)ntsctint/128;
luma=br2[x];
if(z==0) {s=0;luma=((double)br1[x])/12;}
if(z>=13)
{
s=luma=0;
if(z==13)
luma=br3[x];
}
theta=(double)M_PI*(double)(((double)cols[z]*10+ (((double)ntschue/2)+300) )/(double)180);
r=(int)((luma+s*sin(theta))*256);
g=(int)((luma-(double)27/53*s*sin(theta)+(double)10/53*s*cos(theta))*256);
b=(int)((luma-s*cos(theta))*256);
if(r>255) r=255;
if(g>255) g=255;
if(b>255) b=255;
if(r<0) r=0;
if(g<0) g=0;
if(b<0) b=0;
paletten[(x<<4)+z].r=r;
paletten[(x<<4)+z].g=g;
paletten[(x<<4)+z].b=b;
}
WritePalette();
}
static int ipalette=0;
void FCEU_LoadGamePalette(void)
{
uint8 ptmp[192];
FILE *fp;
char *fn;
ipalette=0;
fn=FCEU_MakeFName(FCEUMKF_PALETTE,0,0);
if((fp=FCEUD_UTF8fopen(fn,"rb")))
{
int x;
fread(ptmp,1,192,fp);
fclose(fp);
for(x=0;x<64;x++)
{
palettei[x].r=ptmp[x+x+x];
palettei[x].g=ptmp[x+x+x+1];
palettei[x].b=ptmp[x+x+x+2];
}
ipalette=1;
}
free(fn);
}
void FCEU_ResetPalette(void)
{
if(FCEUGameInfo)
{
ChoosePalette();
WritePalette();
}
}
static void ChoosePalette(void)
{
if(FCEUGameInfo->type==GIT_NSF)
palo=0;
else if(ipalette)
palo=palettei;
else if(ntsccol && !PAL && FCEUGameInfo->type!=GIT_VSUNI)
{
palo=paletten;
CalculatePalette();
}
else
palo=palpoint[pale];
}
void WritePalette(void)
{
int x;
for(x=0;x<7;x++)
FCEUD_SetPalette(x,unvpalette[x].r,unvpalette[x].g,unvpalette[x].b);
if(FCEUGameInfo->type==GIT_NSF)
{
//for(x=0;x<128;x++)
// FCEUD_SetPalette(x,x,0,x);
}
else
{
for(x=0;x<64;x++)
FCEUD_SetPalette(128+x,palo[x].r,palo[x].g,palo[x].b);
SetNESDeemph(lastd,1);
}
}
void FCEUI_GetNTSCTH(int *tint, int *hue)
{
*tint=ntsctint;
*hue=ntschue;
}
static int controlselect=0;
static int controllength=0;
void FCEUI_NTSCDEC(void)
{
if(ntsccol && FCEUGameInfo->type!=GIT_VSUNI &&!PAL && FCEUGameInfo->type!=GIT_NSF)
{
int which;
if(controlselect)
{
if(controllength)
{
which=controlselect==1?ntschue:ntsctint;
which--;
if(which<0) which=0;
if(controlselect==1)
ntschue=which;
else ntsctint=which;
CalculatePalette();
}
controllength=360;
}
}
}
void FCEUI_NTSCINC(void)
{
if(ntsccol && FCEUGameInfo->type!=GIT_VSUNI && !PAL && FCEUGameInfo->type!=GIT_NSF)
if(controlselect)
{
if(controllength)
{
switch(controlselect)
{
case 1:ntschue++;
if(ntschue>128) ntschue=128;
CalculatePalette();
break;
case 2:ntsctint++;
if(ntsctint>128) ntsctint=128;
CalculatePalette();
break;
}
}
controllength=360;
}
}
void FCEUI_NTSCSELHUE(void)
{
if(ntsccol && FCEUGameInfo->type!=GIT_VSUNI && !PAL && FCEUGameInfo->type!=GIT_NSF){controlselect=1;controllength=360;}
}
void FCEUI_NTSCSELTINT(void)
{
if(ntsccol && FCEUGameInfo->type!=GIT_VSUNI && !PAL && FCEUGameInfo->type!=GIT_NSF){controlselect=2;controllength=360;}
}
void FCEU_DrawNTSCControlBars(uint8 *XBuf)
{
uint8 *XBaf;
int which=0;
int x,x2;
if(!controllength) return;
controllength--;
if(!XBuf) return;
if(controlselect==1)
{
DrawTextTrans(XBuf+128-12+180*256, 256, (uint8 *)"Hue", 0x85);
which=ntschue<<1;
}
else if(controlselect==2)
{
DrawTextTrans(XBuf+128-16+180*256, 256, (uint8 *)"Tint", 0x85);
which=ntsctint<<1;
}
XBaf=XBuf+200*256;
for(x=0;x<which;x+=2)
{
for(x2=6;x2>=-6;x2--)
{
XBaf[x-256*x2]=0x85;
}
}
for(;x<256;x+=2)
{
for(x2=2;x2>=-2;x2--)
XBaf[x-256*x2]=0x85;
}
}
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