ref: a50be99567d1b6018a0a1f019a51c0bc7a0f11ff
dir: /include/memlayer.h/
#ifdef PLAN9 #pragma src "/sys/src/libmemlayer" #pragma lib "libmemlayer.a" #endif 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*);