MD/G Scroll - scroll.h

#ifndef _SCROLL_H_
#define _SCROLL_H_ 1



typedef struct
{
    u16  width;
    u16  height;
    u16  nbColors;
    u32  ptrPal;
    u16  nbTiles;
    u32  ptrTiles;
    u16  nbLayers;
    u32 *maps;
}
MAPPY_RES;


typedef struct
{
    s32 x;
    s32 y;

    MAPPY_RES *res;
    u8  pal;
    u16 vram;
    u16 plan;
    u8  level;

    s8 scrollH;
    s8 scrollV;

    s32 plan_x;
    s32 plan_y;
}
SCROLL;




u16  scroll_init     ( u16 plan, MAPPY_RES *res, u16 pal );
void scroll_show     ( u16 plan );
void scroll_move     ( u16 plan, s8 *x, s8 *y );
s8   scroll_move_x   ( u16 plan, s8 value );
s8   scroll_move_y   ( u16 plan, s8 value );
void scroll_update   ( u16 plan );
void scroll_repeat   ( u16 plan, BOOL x, BOOL y );
void scroll_repeat_x ( u16 plan, BOOL repeat );
void scroll_repeat_y ( u16 plan, BOOL repeat );

static s32  _trunc  ( s32 value, s32 max );
static void _col    ( SCROLL scr, s32 column );
static void _row    ( SCROLL scr, s32 row    );
//static s8   _limits ( BOOL repeat, s16 pos, s8 value, u16 length, u16 screen );



#endif