pal.h

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#include "config.h"
#include "types.h"
#include "dma.h"

#ifndef _PAL_H_
#define _PAL_H_

#define VDPPALETTE_REDSFT           1
#define VDPPALETTE_GREENSFT         5
#define VDPPALETTE_BLUESFT          9

#define VDPPALETTE_REDMASK          0x000E
#define VDPPALETTE_GREENMASK        0x00E0
#define VDPPALETTE_BLUEMASK         0x0E00
#define VDPPALETTE_COLORMASK        0x0EEE

#define RGB24_TO_VDPCOLOR(color)    (((((color + 0x100000) < 0xFF0000 ? color + 0x100000 : 0xFF0000) >> (20)) & VDPPALETTE_REDMASK) | (((((color & 0xff00) + 0x1000) < 0xFF00 ? (color & 0xff00) + 0x1000 : 0xFF00) >> ((1 * 4) + 4)) & VDPPALETTE_GREENMASK) | (((((color & 0xff) + 0x10) < 0xFF ? (color & 0xff) + 0x10 : 0xFF) << 4) & VDPPALETTE_BLUEMASK))

#define RGB3_3_3_TO_VDPCOLOR(r, g, b) ((((r) & 7) << VDPPALETTE_REDSFT) | (((g) & 7) << VDPPALETTE_GREENSFT) | (((b) & 7) << VDPPALETTE_BLUESFT))

#define RGB8_8_8_TO_VDPCOLOR(r, g, b) RGB24_TO_VDPCOLOR(((((b) << 0) & 0xFF) | (((g) & 0xFF) << 8) | (((r) & 0xFF) << 16)))

typedef struct
{
    u16 length;
    u16* data;
} Palette;


extern const u16* const palette_black;
extern const u16 palette_grey[16];
extern const u16 palette_red[16];
extern const u16 palette_green[16];
extern const u16 palette_blue[16];

extern u16 fadeCurrentPal[64];
extern u16 fadeEndPal[64];

u16  PAL_getColor(u16 index);
void  PAL_getColors(u16 index, u16* dest, u16 count);
void PAL_getPalette(u16 numPal, u16* dest);

void PAL_setColor(u16 index, u16 value);
void PAL_setColors(u16 index, const u16* pal, u16 count, TransferMethod tm);
void PAL_setPaletteColors(u16 index, const Palette* pal, TransferMethod tm);
void PAL_setPalette(u16 numPal, const u16* pal, TransferMethod tm);

void PAL_setColorsDMA(u16 index, const u16* pal, u16 count);
void PAL_setPaletteColorsDMA(u16 index, const Palette* pal);
void PAL_setPaletteDMA(u16 numPal, const u16* pal);


// these functions should be private as they are called by PAL_fadeXXX functions internally
// but they can be useful sometime for better control on the fading processus
bool PAL_initFade(u16 fromCol, u16 toCol, const u16* palSrc, const u16* palDst, u16 numFrame);
bool PAL_doFadeStep();


void PAL_fade(u16 fromCol, u16 toCol, const u16* palSrc, const u16* palDst, u16 numFrame, bool async);
void PAL_fadeTo(u16 fromCol, u16 toCol, const u16* pal, u16 numFrame, bool async);
void PAL_fadeOut(u16 fromCol, u16 toCol, u16 numFrame, bool async);
void PAL_fadeIn(u16 fromCol, u16 toCol, const u16* pal, u16 numFrame, bool async);

void PAL_fadePalette(u16 numPal, const u16* palSrc, const u16* palDst, u16 numFrame, bool async);
void PAL_fadeToPalette(u16 numPal, const u16* pal, u16 numFrame, bool async);
void PAL_fadeOutPalette(u16 numPal, u16 numFrame, bool async);
void PAL_fadeInPalette(u16 numPal, const u16* pal, u16 numFrame, bool async);

void PAL_fadeAll(const u16* palSrc, const u16* palDst, u16 numFrame, bool async);
void PAL_fadeToAll(const u16* pal, u16 numFrame, bool async);
void PAL_fadeOutAll(u16 numFrame, bool async);
void PAL_fadeInAll(const u16* pal, u16 numFrame, bool async);

bool PAL_isDoingFade();
void PAL_waitFadeCompletion();
void PAL_interruptFade();


#endif // _VDP_PAL_H_