x20090325-1615

1 files changed, 50 insertions, 0 deletions

diff --git a/include/memlayer.h b/include/memlayer.h
new file mode 100644
index 00000000..24e11123
--- /dev/null
+++ b/include/memlayer.h
@@ -0,0 +1,50 @@
+#pragma src "/usr/inferno/libmemlayer"
+
+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*);