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FM Towns: Free Software Collection 9
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FM Towns Free Software Collection 9.iso
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tetujin
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g_eff
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digsm.c
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1994-11-16
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295 lines
/*
graphic effect lib.
Video Digitize Smoother
h. Toda 1994 4 23
*/
#include <stdio.h>
#include <stdlib.h>
#include <egb.h>
#include "g_eff.h"
#define NOERR 0 /* no error */
static int mx ;
static int aSen ;
static int mSen ;
static int cMax ;
static int aMax ;
static int x1 ;
static int y1 ;
static int x2 ;
static int y2 ;
static int (*read1)() ;
static int (*write)() ;
static int (*mask)() ;
g_videoDigitizeSmoother( BASICPARA *para, int mode, int line )
{
mx = para->mix ;
aSen = para->alphaSen ;
mSen = para->maskSen ;
cMax = para->colorMax ;
aMax = para->alphaMax ;
x1 = para->lupx ;
y1 = para->lupy ;
x2 = para->rdwx ;
y2 = para->rdwy ;
read1 = para->read1 ;
write = para->write ;
mask = para->mask ;
line = ( line & 1 ) ^ 1 ;
switch( mode )
{
case 0:
normal( line ) ;
break ;
case 1:
deep( line ) ;
break ;
default:
normal( line ) ;
break ;
}
return NOERR ;
}
static normal( int line )
{
unsigned char a[4][4] ;
int i, x, y ;
int n ;
for( y = y1 ; y <= y2 ; y++ )
{
if( (y % 2) == line )
{
for( x=x1 ; x <= x2 ; x++ )
{
if( y >= 1 )
read1( x, y-1, a[0] ) ;
else
read1( x, 1, a[0] ) ;
read1( x, y, a[1] ) ;
read1( x, y+1, a[2] ) ;
for( i=0 ; i<3 ; i++ )
{
n = ck3( a[0][i], a[1][i], a[2][i] ) ;
a[3][i] = a[n][i] ;
}
mixWrite( x, y, a[3], a[1] ) ;
}
}
else
{
for( x=x1 ; x <= x2 ; x++ )
{
read1( x, y, a[1] ) ;
mixWrite( x, y, a[1], a[1] ) ;
}
}
}
return NOERR ;
}
static deep( int line )
{
unsigned char a[8][4] ;
int i, x, y ;
int n ;
for( y = y1 ; y <= y2 ; y++ )
{
if( (y % 2) == line )
{
for( x=x1 ; x <= x2 ; x++ )
{
if( y >= 1 )
{
read1( x-1, y-1, a[0] ) ;
read1( x, y-1, a[1] ) ;
read1( x+1, y-1, a[2] ) ;
}
else
{
read1( x-1, 1, a[0] ) ;
read1( x, 1, a[1] ) ;
read1( x+1, 1, a[2] ) ;
}
read1( x, y, a[3] ) ;
read1( x-1, y+1, a[4] ) ;
read1( x, y+1, a[5] ) ;
read1( x+1, y+1, a[6] ) ;
for( i=0 ; i<3 ; i++ )
{
n = ck7( a[0][i], a[1][i], a[2][i],
a[3][i], a[4][i], a[5][i], a[6][i] ) ;
a[7][i] = a[n][i] ;
}
mixWrite( x, y, a[7], a[3] ) ;
}
}
else
{
for( x=x1 ; x <= x2 ; x++ )
{
read1( x, y, a[3] ) ;
mixWrite( x, y, a[3], a[3] ) ;
}
}
}
return NOERR ;
}
/* 書き込むデータ a[4] 書き込まれる所にあるデータ b[4] */
static mixWrite( int x, int y, unsigned char *a, unsigned char *b )
{
unsigned char c[4] ;
int mix ;
if( mSen )
{
if( mask( x, y ) >= mSen )
return NOERR ;
}
mix = mx ;
if( aSen )
{
mix = mix * b[3] / aMax ;
}
c[0] = ( a[0] * mix + b[0] * ( 256 - mix ) + 0x80 ) >> 8 ;
c[1] = ( a[1] * mix + b[1] * ( 256 - mix ) + 0x80 ) >> 8 ;
c[2] = ( a[2] * mix + b[2] * ( 256 - mix ) + 0x80 ) >> 8 ;
c[3] = b[3] ;
if( mix )
{
write( x, y, c ) ;
}
return NOERR ;
}
static ck3( int a, int b, int c )
{
int temp ;
int n0, n1, n2 ;
n0 = 0 ; n1 = 1 ; n2 = 2 ;
if( a > b )
{
temp = a ;
a = b ;
b = temp ;
temp = n0 ;
n0 = n1 ;
n1 = temp ;
}
if( a > c )
{
temp = a ;
a = c ;
c = temp ;
temp = n0 ;
n0 = n2 ;
n2 = temp ;
}
if( b > c )
{
temp = b ;
b = c ;
c = temp ;
temp = n1 ;
n1 = n2 ;
n2 = temp ;
}
return n1 ;
}
static ck7( int a0, int a1, int a2, int a3, int a4, int a5, int a6 )
{
int temp ;
int m[7] ;
int a[7] ;
int i, j ;
for( i=0 ; i<7 ; i++ )m[i] = i ;
a[0] = a0 ; a[1] = a1 ; a[2] = a2 ; a[3] = a3 ;
a[4] = a4 ; a[5] = a5 ; a[6] = a6 ;
for( j=1 ; j<5 ; j++ )
{
for( i=j ; i<7 ; i++ )
{
if( a[j-1] > a[i] )
{
temp = a[i] ;
a[i] = a[j-1] ;
a[j-1] =temp ;
temp = m[i] ;
m[i] = m[j-1] ;
m[j-1] =temp ;
}
}
}
return m[3] ;
}
/*
static ck9( int a0, int a1, int a2, int a3,
int a4, int a5, int a6, int a7, int a8 )
{
int temp ;
int m[9] ;
int a[9] ;
int i, j ;
for( i=0 ; i<9 ; i++ )m[i] = i ;
a[0] = a0 ; a[1] = a1 ; a[2] = a2 ; a[3] = a3 ; a[4] = a4 ;
a[5] = a5 ; a[6] = a6 ; a[7] = a7 ; a[8] = a8 ;
for( j=1 ; j<6 ; j++ )
{
for( i=j ; i<9 ; i++ )
{
if( a[j-1] > a[i] )
{
temp = a[i] ;
a[i] = a[j-1] ;
a[j-1] =temp ;
temp = m[i] ;
m[i] = m[j-1] ;
m[j-1] =temp ;
}
}
}
return m[4] ;
}
*/