Import sources from 2011-03-30 iso image - sys/include

1 files changed, 194 insertions, 0 deletions

diff --git a/sys/include/memdraw.h b/sys/include/memdraw.h
new file mode 100755
index 000000000..6e527696a
--- /dev/null
+++ b/sys/include/memdraw.h
@@ -0,0 +1,194 @@
+#pragma	src	"/sys/src/libmemdraw"
+#pragma	lib	"libmemdraw.a"
+
+typedef struct	Memimage Memimage;
+typedef struct	Memdata Memdata;
+typedef struct	Memsubfont Memsubfont;
+typedef struct	Memlayer Memlayer;
+typedef struct	Memcmap Memcmap;
+typedef struct	Memdrawparam	Memdrawparam;
+
+#pragma incomplete Memlayer
+
+/*
+ * Memdata is allocated from main pool, but .data from the image pool.
+ * Memdata is allocated separately to permit patching its pointer after
+ * compaction when windows share the image data.
+ * The first word of data is a back pointer to the Memdata, to find
+ * The word to patch.
+ */
+
+struct Memdata
+{
+	ulong	*base;	/* allocated data pointer */
+	uchar	*bdata;	/* pointer to first byte of actual data; word-aligned */
+	int		ref;		/* number of Memimages using this data */
+	void*	imref;
+	int		allocd;	/* is this malloc'd? */
+};
+
+enum {
+	Frepl		= 1<<0,	/* is replicated */
+	Fsimple	= 1<<1,	/* is 1x1 */
+	Fgrey	= 1<<2,	/* is grey */
+	Falpha	= 1<<3,	/* has explicit alpha */
+	Fcmap	= 1<<4,	/* has cmap channel */
+	Fbytes	= 1<<5,	/* has only 8-bit channels */
+};
+
+struct Memimage
+{
+	Rectangle	r;		/* rectangle in data area, local coords */
+	Rectangle	clipr;		/* clipping region */
+	int		depth;	/* number of bits of storage per pixel */
+	int		nchan;	/* number of channels */
+	ulong	chan;	/* channel descriptions */
+	Memcmap	*cmap;
+
+	Memdata	*data;	/* pointer to data; shared by windows in this image */
+	int		zero;		/* data->bdata+zero==&byte containing (0,0) */
+	ulong	width;	/* width in words of a single scan line */
+	Memlayer	*layer;	/* nil if not a layer*/
+	ulong	flags;
+
+	int		shift[NChan];
+	int		mask[NChan];
+	int		nbits[NChan];
+};
+
+struct Memcmap
+{
+	uchar	cmap2rgb[3*256];
+	uchar	rgb2cmap[16*16*16];
+};
+
+/*
+ * Subfonts
+ *
+ * given char c, Subfont *f, Fontchar *i, and Point p, one says
+ *	i = f->info+c;
+ *	draw(b, Rect(p.x+i->left, p.y+i->top,
+ *		p.x+i->left+((i+1)->x-i->x), p.y+i->bottom),
+ *		color, f->bits, Pt(i->x, i->top));
+ *	p.x += i->width;
+ * to draw characters in the specified color (itself a Memimage) in Memimage b.
+ */
+
+struct	Memsubfont
+{
+	char		*name;
+	short	n;		/* number of chars in font */
+	uchar	height;		/* height of bitmap */
+	char	ascent;		/* top of bitmap to baseline */
+	Fontchar *info;		/* n+1 character descriptors */
+	Memimage	*bits;		/* of font */
+};
+
+/*
+ * Encapsulated parameters and information for sub-draw routines.
+ */
+enum {
+	Simplesrc=1<<0,
+	Simplemask=1<<1,
+	Replsrc=1<<2,
+	Replmask=1<<3,
+	Fullmask=1<<4,
+};
+struct	Memdrawparam
+{
+	Memimage *dst;
+	Rectangle	r;
+	Memimage *src;
+	Rectangle sr;
+	Memimage *mask;
+	Rectangle mr;
+	int op;
+
+	ulong state;
+	ulong mval;	/* if Simplemask, the mask pixel in mask format */
+	ulong mrgba;	/* mval in rgba */
+	ulong sval;	/* if Simplesrc, the source pixel in src format */
+	ulong srgba;	/* sval in rgba */
+	ulong sdval;	/* sval in dst format */
+};
+
+/*
+ * Memimage management
+ */
+
+extern Memimage*	allocmemimage(Rectangle, ulong);
+extern Memimage*	allocmemimaged(Rectangle, ulong, Memdata*);
+extern Memimage*	readmemimage(int);
+extern Memimage*	creadmemimage(int);
+extern int	writememimage(int, Memimage*);
+extern void	freememimage(Memimage*);
+extern int		loadmemimage(Memimage*, Rectangle, uchar*, int);
+extern int		cloadmemimage(Memimage*, Rectangle, uchar*, int);
+extern int		unloadmemimage(Memimage*, Rectangle, uchar*, int);
+extern ulong*	wordaddr(Memimage*, Point);
+extern uchar*	byteaddr(Memimage*, Point);
+extern int		drawclip(Memimage*, Rectangle*, Memimage*, Point*, Memimage*, Point*, Rectangle*, Rectangle*);
+extern void	memfillcolor(Memimage*, ulong);
+extern int		memsetchan(Memimage*, ulong);
+
+/*
+ * Graphics
+ */
+extern void	memdraw(Memimage*, Rectangle, Memimage*, Point, Memimage*, Point, int);
+extern void	memline(Memimage*, Point, Point, int, int, int, Memimage*, Point, int);
+extern void	mempoly(Memimage*, Point*, int, int, int, int, Memimage*, Point, int);
+extern void	memfillpoly(Memimage*, Point*, int, int, Memimage*, Point, int);
+extern void	_memfillpolysc(Memimage*, Point*, int, int, Memimage*, Point, int, int, int, int);
+extern void	memimagedraw(Memimage*, Rectangle, Memimage*, Point, Memimage*, Point, int);
+extern int	hwdraw(Memdrawparam*);
+extern void	memimageline(Memimage*, Point, Point, int, int, int, Memimage*, Point, int);
+extern void	_memimageline(Memimage*, Point, Point, int, int, int, Memimage*, Point, Rectangle, int);
+extern Point	memimagestring(Memimage*, Point, Memimage*, Point, Memsubfont*, char*);
+extern void	memellipse(Memimage*, Point, int, int, int, Memimage*, Point, int);
+extern void	memarc(Memimage*, Point, int, int, int, Memimage*, Point, int, int, int);
+extern Rectangle	memlinebbox(Point, Point, int, int, int);
+extern int	memlineendsize(int);
+extern void	_memmkcmap(void);
+extern void	memimageinit(void);
+
+/*
+ * Subfont management
+ */
+extern Memsubfont*	allocmemsubfont(char*, int, int, int, Fontchar*, Memimage*);
+extern Memsubfont*	openmemsubfont(char*);
+extern void	freememsubfont(Memsubfont*);
+extern Point	memsubfontwidth(Memsubfont*, char*);
+extern Memsubfont*	getmemdefont(void);
+
+/*
+ * Predefined 
+ */
+extern	Memimage*	memwhite;
+extern	Memimage*	memblack;
+extern	Memimage*	memopaque;
+extern	Memimage*	memtransparent;
+extern	Memcmap	*memdefcmap;
+
+/*
+ * Kernel interface
+ */
+void		memimagemove(void*, void*);
+
+/*
+ * Kernel cruft
+ */
+extern void	rdb(void);
+extern int		iprint(char*, ...);
+#pragma varargck argpos iprint 1
+extern int		drawdebug;
+
+/*
+ * doprint interface: numbconv bit strings
+ */
+#pragma varargck type "llb" vlong
+#pragma varargck type "llb" uvlong
+#pragma varargck type "lb" long
+#pragma varargck type "lb" ulong
+#pragma varargck type "b" int
+#pragma varargck type "b" uint
+