Subversion Repositories planix.SVN

#pragma src "/sys/src/libmemlayer"
#pragma lib "libmemlayer.a"

typedef struct Memscreen Memscreen;
typedef void (*Refreshfn)(Memimage*, Rectangle, void*);

struct Memscreen
{
        Memimage        *frontmost;     /* frontmost layer on screen */
        Memimage        *rearmost;      /* rearmost layer on screen */
        Memimage        *image;         /* upon which all layers are drawn */
        Memimage        *fill;                  /* if non-zero, picture to use when repainting */
};

struct Memlayer
{
        Rectangle               screenr;        /* true position of layer on screen */
        Point                   delta;  /* add delta to go from image coords to screen */
        Memscreen       *screen;        /* screen this layer belongs to */
        Memimage        *front; /* window in front of this one */
        Memimage        *rear;  /* window behind this one*/
        int             clear;  /* layer is fully visible */
        Memimage        *save;  /* save area for obscured parts */
        Refreshfn       refreshfn;              /* function to call to refresh obscured parts if save==nil */
        void            *refreshptr;    /* argument to refreshfn */
};

/*
 * These functions accept local coordinates
 */
int                     memload(Memimage*, Rectangle, uchar*, int, int);
int                     memunload(Memimage*, Rectangle, uchar*, int);

/*
 * All these functions accept screen coordinates, not local ones.
 */
void                    _memlayerop(void (*fn)(Memimage*, Rectangle, Rectangle, void*, int), Memimage*, Rectangle, Rectangle, void*);
Memimage*       memlalloc(Memscreen*, Rectangle, Refreshfn, void*, ulong);
void                    memldelete(Memimage*);
void                    memlfree(Memimage*);
void                    memltofront(Memimage*);
void                    memltofrontn(Memimage**, int);
void                    _memltofrontfill(Memimage*, int);
void                    memltorear(Memimage*);
void                    memltorearn(Memimage**, int);
int                     memlsetrefresh(Memimage*, Refreshfn, void*);
void                    memlhide(Memimage*, Rectangle);
void                    memlexpose(Memimage*, Rectangle);
void                    _memlsetclear(Memscreen*);
int                     memlorigin(Memimage*, Point, Point);
void                    memlnorefresh(Memimage*, Rectangle, void*);