vga_pal.h

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#ifndef _VGA_PAL_H
#define _VGA_PAL_H
 
#define MULTICOL(a,b,c,d) ((a)|((b)<<8)|((c)<<16)|((d)<<24)) 
 
// CGA colors
#define CGACOL_0    0   
#define CGACOL_1    2   
#define CGACOL_2    20  
#define CGACOL_3    22  
#define CGACOL_4    160 
#define CGACOL_5    162 
#define CGACOL_6    168 
#define CGACOL_7    182 
#define CGACOL_8    73  
#define CGACOL_9    75  
#define CGACOL_10   93  
#define CGACOL_11   95  
#define CGACOL_12   233 
#define CGACOL_13   235 
#define CGACOL_14   253 
#define CGACOL_15   255 
 
// ZX Spectrum color
#define ZXCOL_0     0   
#define ZXCOL_1     2   
#define ZXCOL_2     160 
#define ZXCOL_3     162 
#define ZXCOL_4     20  
#define ZXCOL_5     22  
#define ZXCOL_6     180 
#define ZXCOL_7     182 
#define ZXCOL_8     73  
#define ZXCOL_9     3   
#define ZXCOL_10    224 
#define ZXCOL_11    227 
#define ZXCOL_12    28  
#define ZXCOL_13    31  
#define ZXCOL_14    252 
#define ZXCOL_15    255 
 
// Colors
//  GP0 ... B0 ... VGA B0 blue
//  GP1 ... B1 ... VGA B1
//  GP2 ... B2 ... VGA G0 green
//  GP3 ... B3 ... VGA G1
//  GP4 ... B4 ... VGA G2
//  GP5 ... B5 ... VGA R0 red
//  GP6 ... B6 ... VGA R1
//  GP7 ... B7 ... VGA R2
 
#define COL_BLACK   0
 
#define COL_DARKBLUE    B0
#define COL_SEMIBLUE    B1
#define COL_BLUE    (B0+B1)
#define COL_MOREBLUE    (COL_BLUE+B3+B6)
#define COL_LIGHTBLUE   (COL_BLUE+B4+B7)
 
#define COL_DARKGREEN   B3
#define COL_SEMIGREEN   B4
#define COL_GREEN   (B2+B3+B4)
#define COL_MOREGREEN   (COL_GREEN+B0+B6)
#define COL_LIGHTGREEN  (COL_GREEN+B1+B7)
 
#define COL_DARKRED B6
#define COL_SEMIRED B7
#define COL_RED     (B5+B6+B7)
#define COL_MORERED (COL_RED+B0+B3)
#define COL_LIGHTRED    (COL_RED+B1+B4)
 
#define COL_DARKCYAN    (B0+B3)
#define COL_SEMICYAN    (B1+B4)
#define COL_CYAN    (B0+B1+B2+B3+B4)
 
#define COL_DARKMAGENTA (B0+B6)
#define COL_SEMIMAGENTA (B1+B7)
#define COL_MAGENTA (B0+B1+B5+B6+B7)
 
#define COL_DARKYELLOW  (B3+B6)
#define COL_SEMIYELLOW  (B4+B7)
#define COL_YELLOW  (B2+B3+B4+B5+B6+B7)
 
#define COL_GRAY0   0
#define COL_GRAY1   (B2+B5)
#define COL_GRAY2   (B0+B3+B6)
#define COL_GRAY3   (B0+B2+B3+B5+B6)
#define COL_GRAY4   (B1+B4+B7)
#define COL_GRAY5   (B1+B2+B4+B5+B7)
#define COL_GRAY6   (B0+B1+B3+B4+B6+B7)
#define COL_GRAY7   (B0+B1+B2+B3+B4+B5+B6+B7)
 
#define COL_WHITE   COL_GRAY7
 
#define COLRGB(r,g,b) ((u8)(((r)&0xe0)|(((g)&0xe0)>>3)|((b)>>6)))
 
extern u8 DefPal16[16];     // - do not set "const", to stay in faster RAM
 
extern u8 ZXPal16[16];      // - do not set "const", to stay in faster RAM
 
// 4-color palettes (CGA colors) 
// - do not set "const", to stay in faster RAM
extern u8 PalCGA1[4]; 
extern u8 PalCGA2[4]; 
extern u8 PalCGA3[4]; 
extern u8 PalCGA4[4]; 
extern u8 PalCGA5[4]; 
extern u8 PalCGA6[4]; 
 
// 4-color palette translation table
//extern u32 Pal4Trans[256];
//extern u32 Pal4Plane[256];
 
// 16-color palette translation table
//extern u16 Pal16Trans[256];
//extern u16 ZX16Trans[256];
 
// values of color components
extern u8 RGVal[8];     
extern u8 BVal[4];      
 
int ColDist(u8 col1, u8 col2);
 
void GenGrad(u8* dst, int w);
 
 
#endif // _VGA_PAL_H