ref: 611dced75f0a6c9fd4b35b88ee0dd9ac5806cb54
dir: /os/boot/rpcg/libg.h/
#pragma src "/sys/src/libg"
#pragma lib "libg.a"
enum /* constants for I/O to devgraphics */
{
Tilehdr = 40,
Tilesize = 8000
};
/*
* you may think it's a blit, but it's gnot
*/
enum
{
EMAXMSG = 128+8192, /* size of 9p header+data */
};
/*
* Types
*/
typedef struct Bitmap Bitmap;
typedef struct Display Display;
typedef struct Point Point;
typedef struct Rectangle Rectangle;
typedef struct Cursor Cursor;
typedef struct Mouse Mouse;
typedef struct Menu Menu;
typedef struct Font Font;
typedef struct Fontchar Fontchar;
typedef struct Subfont Subfont;
typedef struct Cachefont Cachefont;
typedef struct Cacheinfo Cacheinfo;
typedef struct Cachesubf Cachesubf;
typedef struct Event Event;
typedef struct Slave Slave;
typedef struct Ebuf Ebuf;
typedef struct RGB RGB;
typedef struct Linedesc Linedesc;
typedef struct DRefret DRefret;
struct DRefret
{
int n; /* number of bytes */
int dy; /* number of lines */
uchar *dp; /* pointer to data */
};
struct Point
{
int x;
int y;
};
struct Rectangle
{
Point min;
Point max;
};
typedef DRefret DRefresh(Display*, int, Rectangle, uchar*, uchar*, int);
struct Bitmap
{
Rectangle r; /* rectangle in data area, local coords */
Rectangle clipr; /* clipping region */
int ldepth; /* log base 2 of number of bits per pixel */
ulong *base; /* pointer to start of data */
int zero; /* base+zero=&word containing (0,0) */
ulong width; /* width in words of total data area */
Display *display; /* if present */
};
struct Display
{
uchar *data; /* transfer buffer */
Rectangle r;
int ldepth;
Rectangle bb; /* bounding box of changes */
int waste; /* unused part of bb */
Rectangle bound; /* memory for boundin/boundout */
Bitmap *image; /* owner */
int id;
int fd;
int ctlfd;
int local;
int bytewidth;
void *drdata1; /* storage for drefresh() */
void *drdata2; /* storage for drefresh() */
DRefresh *drefresh;
};
struct Mouse
{
int buttons; /* bit array: LMR=124 */
Point xy;
ulong msec;
};
struct Cursor
{
Point offset;
uchar clr[2*16];
uchar set[2*16];
};
struct Menu
{
char **item;
char *(*gen)(int);
int lasthit;
};
struct Linedesc
{
int x0;
int y0;
char xmajor;
char slopeneg;
long dminor;
long dmajor;
};
/*
* Subfonts
*
* given char c, Subfont *f, Fontchar *i, and Point p, one says
* i = f->info+c;
* bitblt(b, Pt(p.x+i->left,p.y+i->top),
* bitmap, Rect(i->x,i->top,(i+1)->x,i->bottom),
* fc);
* p.x += i->width;
* where bitmap b is the repository of the images.
*
*/
struct Fontchar
{
short x; /* left edge of bits */
uchar top; /* first non-zero scan-line */
uchar bottom; /* last non-zero scan-line + 1 */
char left; /* offset of baseline */
uchar width; /* width of baseline */
};
struct Subfont
{
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 */
Bitmap *bits; /* of font */
};
enum
{
/* starting values */
LOG2NFCACHE = 6,
NFCACHE = (1<<LOG2NFCACHE), /* #chars cached */
NFLOOK = 5, /* #chars to scan in cache */
NFSUBF = 2, /* #subfonts to cache */
/* max value */
MAXFCACHE = 2048+NFLOOK, /* generous upper limit */
MAXSUBF = 50, /* generous upper limit */
/* deltas */
DSUBF = 4,
/* expiry ages */
SUBFAGE = 10000,
CACHEAGE = 10000,
};
struct Cachefont
{
Rune min; /* lowest rune value to be taken from subfont */
Rune max; /* highest rune value+1 to be taken from subfont */
int offset; /* position in subfont of character at min */
int abs; /* name has been made absolute */
char *name;
};
struct Cacheinfo
{
Rune value; /* value of character at this slot in cache */
ushort age;
ulong xright; /* right edge of bits */
Fontchar;
};
struct Cachesubf
{
ulong age; /* for replacement */
Cachefont *cf; /* font info that owns us */
Subfont *f; /* attached subfont */
};
struct Font
{
char *name;
short height; /* max height of bitmap, interline spacing */
short ascent; /* top of bitmap to baseline */
int maxldepth; /* over all loaded subfonts */
short width; /* widest so far; used in caching only */
short ldepth; /* of images */
short nsub; /* number of subfonts */
ulong age; /* increasing counter; used for LRU */
int ncache; /* size of cache */
int nsubf; /* size of subfont list */
Cacheinfo *cache;
Cachesubf *subf;
Cachefont **sub; /* as read from file */
Bitmap *cacheimage;
};
struct Event
{
int kbdc;
Mouse mouse;
int n; /* number of characters in mesage */
uchar data[EMAXMSG]; /* message from an arbitrary file descriptor */
};
struct Slave{
int pid;
Ebuf *head; /* queue of messages for this descriptor */
Ebuf *tail;
};
struct Ebuf{
Ebuf *next;
int n; /* number of bytes in buf */
uchar buf[EMAXMSG];
};
struct RGB
{
ulong red;
ulong green;
ulong blue;
};
/*
* Codes for bitblt etc.
*
* D
* 0 1
* ---------
* 0 | 1 | 2 |
* S |---|---|
* 1 | 4 | 8 |
* ---------
*
* Usually used as D|S; DorS is so tracebacks are readable.
*/
typedef
enum Fcode
{
Zero = 0x0,
DnorS = 0x1,
DandnotS = 0x2,
notS = 0x3,
notDandS = 0x4,
notD = 0x5,
DxorS = 0x6,
DnandS = 0x7,
DandS = 0x8,
DxnorS = 0x9,
D = 0xA,
DornotS = 0xB,
S = 0xC,
notDorS = 0xD,
DorS = 0xE,
F = 0xF,
} Fcode;
/*
* Miscellany
*/
extern Point add(Point, Point), sub(Point, Point);
extern Point mul(Point, int), div(Point, int);
extern Rectangle rsubp(Rectangle, Point), raddp(Rectangle, Point), inset(Rectangle, int);
extern Rectangle rmul(Rectangle, int), rdiv(Rectangle, int);
extern Rectangle rshift(Rectangle, int), rcanon(Rectangle);
extern Bitmap* balloc(Rectangle, int);
extern Bitmap* ballocnomem(Rectangle, int);
extern Bitmap* brealloc(Bitmap*, Rectangle, int);
extern Bitmap* breallocnomem(Bitmap*, Rectangle, int);
extern int bbytewidth(Bitmap*, int*, int*);
extern void bfree(Bitmap*);
extern void bfreemem(Bitmap*);
extern int rectclip(Rectangle*, Rectangle);
extern void binit(void(*)(char*), char*, char*);
extern void binit1(void(*)(char*), char*, char*, int);
extern void bclose(void);
extern void berror(char*);
extern void bitblt(Bitmap*, Point, Bitmap*, Rectangle, Fcode);
extern int bitbltclip(void*);
extern Font* rdfontfile(char*, int);
extern void ffree(Font*);
extern void fminldepth(Font*);
extern Font* mkfont(Subfont*, Rune);
extern Subfont* subfalloc(int, int, int, Fontchar*, Bitmap*);
extern void subffree(Subfont*);
extern int cachechars(Font*, char**, ushort*, int, int*);
extern Point string(Bitmap*, Point, Font*, char*, Fcode);
extern Point subfstring(Bitmap*, Point, Subfont*, char*, Fcode);
extern void segment(Bitmap*, Point, Point, int, Fcode);
extern void point(Bitmap*, Point, int, Fcode);
extern void arc(Bitmap*, Point, Point, Point, int, Fcode);
extern void circle(Bitmap*, Point, int, int, Fcode);
extern void disc(Bitmap*, Point, int, int, Fcode);
extern void ellipse(Bitmap*, Point, int, int, int, Fcode);
extern long strwidth(Font*, char*);
extern void agefont(Font*);
extern int loadchar(Font*, Rune, Cacheinfo*, int, int);
extern Point strsize(Font*, char*);
extern long charwidth(Font*, Rune);
extern void texture(Bitmap*, Rectangle, Bitmap*, Fcode);
extern void wrbitmap(Bitmap*, int, int, uchar*);
extern void rdbitmap(Bitmap*, int, int, uchar*);
extern void wrbitmapfile(int, Bitmap*);
extern Bitmap* rdbitmapfile(int);
extern void wrsubfontfile(int, Subfont*);
extern void wrcolmap(Bitmap*, RGB*);
extern void rdcolmap(Bitmap*, RGB*);
extern Subfont* rdsubfontfile(int, Bitmap*);
extern void _unpackinfo(Fontchar*, uchar*, int);
extern int ptinrect(Point, Rectangle), rectinrect(Rectangle, Rectangle);
extern int rectXrect(Rectangle, Rectangle);
extern int eqpt(Point, Point), eqrect(Rectangle, Rectangle);
extern void border(Bitmap*, Rectangle, int, Fcode);
extern void cursorswitch(Cursor*);
extern void cursorset(Point);
extern Rectangle bscreenrect(Rectangle*);
extern void bflush(void);
extern void bexit(void);
extern int _clipline(Rectangle, Point*, Point*, Linedesc*);
extern int clipline(Rectangle, Point*, Point*);
extern int clipr(Bitmap*, Rectangle);
extern void einit(ulong);
extern ulong estart(ulong, int, int);
extern ulong etimer(ulong, int);
extern ulong event(Event*);
extern ulong eread(ulong, Event*);
extern Ebuf* ebread(Slave*);
extern Mouse emouse(void);
extern int ekbd(void);
extern int ecanread(ulong);
extern int ecanmouse(void);
extern int ecankbd(void);
extern void ereshaped(Rectangle); /* supplied by user */
extern int menuhit(int, Mouse*, Menu*);
extern Rectangle getrect(int, Mouse*);
extern ulong rgbpix(Bitmap*, RGB);
extern int _gminor(long, Linedesc*);
enum{
Emouse = 1,
Ekeyboard = 2,
};
enum
{
MAXSLAVE = 32,
};
#define Pt(x, y) ((Point){(x), (y)})
#define Rect(x1, y1, x2, y2) ((Rectangle){Pt(x1, y1), Pt(x2, y2)})
#define Rpt(p1, p2) ((Rectangle){(p1), (p2)})
#define Dx(r) ((r).max.x-(r).min.x)
#define Dy(r) ((r).max.y-(r).min.y)
extern Bitmap screen;
extern Font *font;
extern uchar _btmp[8192];
extern int _mousefd;
extern int _cursorfd;
#define BGSHORT(p) (((p)[0]<<0) | ((p)[1]<<8))
#define BGLONG(p) ((BGSHORT(p)<<0) | (BGSHORT(p+2)<<16))
#define BPSHORT(p, v) ((p)[0]=(v), (p)[1]=((v)>>8))
#define BPLONG(p, v) (BPSHORT(p, (v)), BPSHORT(p+2, (v)>>16))
ulong *wordaddr(Bitmap*, Point);
uchar *byteaddr(Bitmap*, Point);
int dfree(Display*);
int dwritectl(Display*, char*, int);
int dreadctl(Display*, char*, int);
int dinfo(Display*, int, int*, Rectangle*);
void* dinit(Display*, Bitmap*, int, int);
int ddelete(Display*);
void dfreemem(Display*);
int dreadctl(Display*, char*, int);
int dwritectl(Display*, char*, int);
void dbound(Display*, Rectangle);
void bload(Bitmap*, Rectangle, uchar*);
ulong bunload(Bitmap*, Rectangle, uchar*);
void drefresh(Display*, Rectangle);
Display *dopen(char*, int, DRefresh*);
Bitmap* dbitmap(Display*, DRefresh*, int);
void dclose(Display*);
void dflush(Display*);
void _bltinit(void);
Bitmap* battach(Bitmap*, int, int);
int readmouse(Mouse*);
int atomouse(Mouse*, char*, int);
/*
* Refresh functions
*/
DRefresh drtexture;
DRefresh drbackstore;