538 lines
16 KiB
C
538 lines
16 KiB
C
#ifndef _PLAN9_SOURCE
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This header file is an extension to ANSI/POSIX
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#endif
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#ifndef __DRAW_H_
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#define __DRAW_H_
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#pragma src "/sys/src/ape/lib/draw"
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#pragma lib "/$M/lib/ape/libdraw.a"
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#include <u.h>
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#include <fmt.h>
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#include <qlock.h>
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typedef struct Cachefont Cachefont;
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typedef struct Cacheinfo Cacheinfo;
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typedef struct Cachesubf Cachesubf;
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typedef struct Display Display;
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typedef struct Font Font;
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typedef struct Fontchar Fontchar;
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typedef struct Image Image;
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typedef struct Mouse Mouse;
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typedef struct Point Point;
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typedef struct Rectangle Rectangle;
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typedef struct RGB RGB;
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typedef struct Screen Screen;
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typedef struct Subfont Subfont;
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#pragma varargck type "R" Rectangle
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#pragma varargck type "P" Point
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extern int Rfmt(Fmt*);
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extern int Pfmt(Fmt*);
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enum
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{
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DOpaque = 0xFFFFFFFF,
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DTransparent = 0x00000000, /* only useful for allocimage, memfillcolor */
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DBlack = 0x000000FF,
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DWhite = 0xFFFFFFFF,
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DRed = 0xFF0000FF,
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DGreen = 0x00FF00FF,
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DBlue = 0x0000FFFF,
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DCyan = 0x00FFFFFF,
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DMagenta = 0xFF00FFFF,
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DYellow = 0xFFFF00FF,
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DPaleyellow = 0xFFFFAAFF,
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DDarkyellow = 0xEEEE9EFF,
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DDarkgreen = 0x448844FF,
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DPalegreen = 0xAAFFAAFF,
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DMedgreen = 0x88CC88FF,
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DDarkblue = 0x000055FF,
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DPalebluegreen= 0xAAFFFFFF,
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DPaleblue = 0x0000BBFF,
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DBluegreen = 0x008888FF,
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DGreygreen = 0x55AAAAFF,
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DPalegreygreen = 0x9EEEEEFF,
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DYellowgreen = 0x99994CFF,
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DMedblue = 0x000099FF,
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DGreyblue = 0x005DBBFF,
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DPalegreyblue = 0x4993DDFF,
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DPurpleblue = 0x8888CCFF,
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DNotacolor = 0xFFFFFF00,
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DNofill = DNotacolor,
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};
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enum
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{
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Displaybufsize = 8000,
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ICOSSCALE = 1024,
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Borderwidth = 4,
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};
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enum
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{
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/* refresh methods */
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Refbackup = 0,
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Refnone = 1,
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Refmesg = 2
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};
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#define NOREFRESH ((void*)-1)
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enum
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{
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/* line ends */
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Endsquare = 0,
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Enddisc = 1,
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Endarrow = 2,
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Endmask = 0x1F
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};
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#define ARROW(a, b, c) (Endarrow|((a)<<5)|((b)<<14)|((c)<<23))
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typedef enum
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{
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/* Porter-Duff compositing operators */
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Clear = 0,
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SinD = 8,
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DinS = 4,
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SoutD = 2,
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DoutS = 1,
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S = SinD|SoutD,
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SoverD = SinD|SoutD|DoutS,
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SatopD = SinD|DoutS,
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SxorD = SoutD|DoutS,
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D = DinS|DoutS,
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DoverS = DinS|DoutS|SoutD,
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DatopS = DinS|SoutD,
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DxorS = DoutS|SoutD, /* == SxorD */
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Ncomp = 12,
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} Drawop;
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/*
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* image channel descriptors
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*/
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enum {
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CRed = 0,
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CGreen,
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CBlue,
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CGrey,
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CAlpha,
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CMap,
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CIgnore,
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NChan,
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};
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#define __DC(type, nbits) ((((type)&15)<<4)|((nbits)&15))
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#define CHAN1(a,b) __DC(a,b)
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#define CHAN2(a,b,c,d) (CHAN1((a),(b))<<8|__DC((c),(d)))
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#define CHAN3(a,b,c,d,e,f) (CHAN2((a),(b),(c),(d))<<8|__DC((e),(f)))
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#define CHAN4(a,b,c,d,e,f,g,h) (CHAN3((a),(b),(c),(d),(e),(f))<<8|__DC((g),(h)))
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#define NBITS(c) ((c)&15)
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#define TYPE(c) (((c)>>4)&15)
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enum {
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GREY1 = CHAN1(CGrey, 1),
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GREY2 = CHAN1(CGrey, 2),
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GREY4 = CHAN1(CGrey, 4),
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GREY8 = CHAN1(CGrey, 8),
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CMAP8 = CHAN1(CMap, 8),
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RGB15 = CHAN4(CIgnore, 1, CRed, 5, CGreen, 5, CBlue, 5),
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RGB16 = CHAN3(CRed, 5, CGreen, 6, CBlue, 5),
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RGB24 = CHAN3(CRed, 8, CGreen, 8, CBlue, 8),
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RGBA32 = CHAN4(CRed, 8, CGreen, 8, CBlue, 8, CAlpha, 8),
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ARGB32 = CHAN4(CAlpha, 8, CRed, 8, CGreen, 8, CBlue, 8), /* stupid VGAs */
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XRGB32 = CHAN4(CIgnore, 8, CRed, 8, CGreen, 8, CBlue, 8),
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BGR24 = CHAN3(CBlue, 8, CGreen, 8, CRed, 8),
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ABGR32 = CHAN4(CAlpha, 8, CBlue, 8, CGreen, 8, CRed, 8),
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XBGR32 = CHAN4(CIgnore, 8, CBlue, 8, CGreen, 8, CRed, 8),
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};
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extern char* chantostr(char*, ulong);
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extern ulong strtochan(char*);
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extern int chantodepth(ulong);
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struct Point
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{
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int x;
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int y;
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};
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struct Rectangle
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{
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Point min;
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Point max;
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};
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typedef void (*Reffn)(Image*, Rectangle, void*);
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struct Screen
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{
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Display *display; /* display holding data */
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int id; /* id of system-held Screen */
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Image *image; /* unused; for reference only */
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Image *fill; /* color to paint behind windows */
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};
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struct Display
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{
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QLock qlock;
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int locking; /*program is using lockdisplay */
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int dirno;
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int fd;
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int reffd;
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int ctlfd;
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int imageid;
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int local;
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void (*error)(Display*, char*);
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char *devdir;
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char *windir;
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char oldlabel[64];
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ulong dataqid;
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Image *white;
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Image *black;
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Image *opaque;
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Image *transparent;
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Image *image;
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uchar *buf;
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int bufsize;
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uchar *bufp;
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Font *defaultfont;
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Subfont *defaultsubfont;
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Image *windows;
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Image *screenimage;
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int _isnewdisplay;
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};
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struct Image
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{
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Display *display; /* display holding data */
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int id; /* id of system-held Image */
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Rectangle r; /* rectangle in data area, local coords */
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Rectangle clipr; /* clipping region */
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int depth; /* number of bits per pixel */
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ulong chan;
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int repl; /* flag: data replicates to tile clipr */
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Screen *screen; /* 0 if not a window */
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Image *next; /* next in list of windows */
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};
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struct RGB
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{
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ulong red;
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ulong green;
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ulong blue;
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};
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/*
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* Subfonts
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*
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* given char c, Subfont *f, Fontchar *i, and Point p, one says
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* i = f->info+c;
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* draw(b, Rect(p.x+i->left, p.y+i->top,
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* p.x+i->left+((i+1)->x-i->x), p.y+i->bottom),
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* color, f->bits, Pt(i->x, i->top));
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* p.x += i->width;
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* to draw characters in the specified color (itself an Image) in Image b.
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*/
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struct Fontchar
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{
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int x; /* left edge of bits */
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uchar top; /* first non-zero scan-line */
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uchar bottom; /* last non-zero scan-line + 1 */
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char left; /* offset of baseline */
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uchar width; /* width of baseline */
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};
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struct Subfont
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{
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char *name;
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short n; /* number of chars in font */
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uchar height; /* height of image */
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char ascent; /* top of image to baseline */
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Fontchar *info; /* n+1 character descriptors */
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Image *bits; /* of font */
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int ref;
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};
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enum
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{
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/* starting values */
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LOG2NFCACHE = 6,
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NFCACHE = (1<<LOG2NFCACHE), /* #chars cached */
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NFLOOK = 5, /* #chars to scan in cache */
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NFSUBF = 2, /* #subfonts to cache */
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/* max value */
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MAXFCACHE = 1024+NFLOOK, /* upper limit */
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MAXSUBF = 50, /* generous upper limit */
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/* deltas */
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DSUBF = 4,
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/* expiry ages */
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SUBFAGE = 10000,
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CACHEAGE = 10000
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};
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struct Cachefont
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{
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Rune min; /* lowest rune value to be taken from subfont */
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Rune max; /* highest rune value+1 to be taken from subfont */
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int offset; /* position in subfont of character at min */
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char *name; /* stored in font */
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char *subfontname; /* to access subfont */
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};
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struct Cacheinfo
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{
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ushort x; /* left edge of bits */
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uchar width; /* width of baseline */
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schar left; /* offset of baseline */
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Rune value; /* value of character at this slot in cache */
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ushort age;
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};
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struct Cachesubf
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{
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ulong age; /* for replacement */
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Cachefont *cf; /* font info that owns us */
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Subfont *f; /* attached subfont */
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};
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struct Font
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{
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char *name;
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Display *display;
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short height; /* max height of image, interline spacing */
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short ascent; /* top of image to baseline */
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short width; /* widest so far; used in caching only */
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short nsub; /* number of subfonts */
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ulong age; /* increasing counter; used for LRU */
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int maxdepth; /* maximum depth of all loaded subfonts */
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int ncache; /* size of cache */
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int nsubf; /* size of subfont list */
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Cacheinfo *cache;
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Cachesubf *subf;
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Cachefont **sub; /* as read from file */
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Image *cacheimage;
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};
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#define Dx(r) ((r).max.x-(r).min.x)
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#define Dy(r) ((r).max.y-(r).min.y)
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Image management
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*/
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extern Image* _allocimage(Image*, Display*, Rectangle, ulong, int, ulong, int, int);
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extern Image* allocimage(Display*, Rectangle, ulong, int, ulong);
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extern uchar* bufimage(Display*, int);
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extern int bytesperline(Rectangle, int);
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extern void closedisplay(Display*);
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extern void drawerror(Display*, char*);
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extern int flushimage(Display*, int);
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extern int freeimage(Image*);
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extern int _freeimage1(Image*);
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extern int geninitdraw(char*, void(*)(Display*, char*), char*, char*, char*, int);
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extern int initdraw(void(*)(Display*, char*), char*, char*);
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extern int newwindow(char*);
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extern Display* initdisplay(char*, char*, void(*)(Display*, char*));
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extern int loadimage(Image*, Rectangle, uchar*, int);
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extern int cloadimage(Image*, Rectangle, uchar*, int);
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extern int getwindow(Display*, int);
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extern int gengetwindow(Display*, char*, Image**, Screen**, int);
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extern Image* readimage(Display*, int, int);
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extern Image* creadimage(Display*, int, int);
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extern int unloadimage(Image*, Rectangle, uchar*, int);
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extern int wordsperline(Rectangle, int);
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extern int writeimage(int, Image*, int);
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extern Image* namedimage(Display*, char*);
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extern int nameimage(Image*, char*, int);
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extern Image* allocimagemix(Display*, ulong, ulong);
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/*
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* Colors
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*/
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extern void readcolmap(Display*, RGB*);
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extern void writecolmap(Display*, RGB*);
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extern ulong setalpha(ulong, uchar);
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/*
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* Windows
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*/
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extern Screen* allocscreen(Image*, Image*, int);
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extern Image* _allocwindow(Image*, Screen*, Rectangle, int, ulong);
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extern Image* allocwindow(Screen*, Rectangle, int, ulong);
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extern void bottomnwindows(Image**, int);
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extern void bottomwindow(Image*);
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extern int freescreen(Screen*);
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extern Screen* publicscreen(Display*, int, ulong);
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extern void topnwindows(Image**, int);
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extern void topwindow(Image*);
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extern int originwindow(Image*, Point, Point);
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/*
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* Geometry
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*/
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extern Point Pt(int, int);
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extern Rectangle Rect(int, int, int, int);
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extern Rectangle Rpt(Point, Point);
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extern Point addpt(Point, Point);
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extern Point subpt(Point, Point);
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extern Point divpt(Point, int);
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extern Point mulpt(Point, int);
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extern int eqpt(Point, Point);
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extern int eqrect(Rectangle, Rectangle);
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extern Rectangle insetrect(Rectangle, int);
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extern Rectangle rectaddpt(Rectangle, Point);
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extern Rectangle rectsubpt(Rectangle, Point);
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extern Rectangle canonrect(Rectangle);
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extern int rectXrect(Rectangle, Rectangle);
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extern int rectinrect(Rectangle, Rectangle);
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extern void combinerect(Rectangle*, Rectangle);
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extern int rectclip(Rectangle*, Rectangle);
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extern int ptinrect(Point, Rectangle);
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extern void replclipr(Image*, int, Rectangle);
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extern int drawreplxy(int, int, int); /* used to be drawsetxy */
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extern Point drawrepl(Rectangle, Point);
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extern int rgb2cmap(int, int, int);
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extern int cmap2rgb(int);
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extern int cmap2rgba(int);
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extern void icossin(int, int*, int*);
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extern void icossin2(int, int, int*, int*);
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extern int badrect(Rectangle);
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/*
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* Graphics
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*/
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extern void draw(Image*, Rectangle, Image*, Image*, Point);
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extern void drawop(Image*, Rectangle, Image*, Image*, Point, Drawop);
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extern void gendraw(Image*, Rectangle, Image*, Point, Image*, Point);
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extern void gendrawop(Image*, Rectangle, Image*, Point, Image*, Point, Drawop);
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extern void line(Image*, Point, Point, int, int, int, Image*, Point);
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extern void lineop(Image*, Point, Point, int, int, int, Image*, Point, Drawop);
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extern void poly(Image*, Point*, int, int, int, int, Image*, Point);
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extern void polyop(Image*, Point*, int, int, int, int, Image*, Point, Drawop);
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extern void fillpoly(Image*, Point*, int, int, Image*, Point);
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extern void fillpolyop(Image*, Point*, int, int, Image*, Point, Drawop);
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extern Point string(Image*, Point, Image*, Point, Font*, char*);
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extern Point stringop(Image*, Point, Image*, Point, Font*, char*, Drawop);
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extern Point stringn(Image*, Point, Image*, Point, Font*, char*, int);
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extern Point stringnop(Image*, Point, Image*, Point, Font*, char*, int, Drawop);
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extern Point runestring(Image*, Point, Image*, Point, Font*, Rune*);
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extern Point runestringop(Image*, Point, Image*, Point, Font*, Rune*, Drawop);
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extern Point runestringn(Image*, Point, Image*, Point, Font*, Rune*, int);
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extern Point runestringnop(Image*, Point, Image*, Point, Font*, Rune*, int, Drawop);
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extern Point stringbg(Image*, Point, Image*, Point, Font*, char*, Image*, Point);
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extern Point stringbgop(Image*, Point, Image*, Point, Font*, char*, Image*, Point, Drawop);
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extern Point stringnbg(Image*, Point, Image*, Point, Font*, char*, int, Image*, Point);
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extern Point stringnbgop(Image*, Point, Image*, Point, Font*, char*, int, Image*, Point, Drawop);
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extern Point runestringbg(Image*, Point, Image*, Point, Font*, Rune*, Image*, Point);
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extern Point runestringbgop(Image*, Point, Image*, Point, Font*, Rune*, Image*, Point, Drawop);
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extern Point runestringnbg(Image*, Point, Image*, Point, Font*, Rune*, int, Image*, Point);
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extern Point runestringnbgop(Image*, Point, Image*, Point, Font*, Rune*, int, Image*, Point, Drawop);
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extern Point _string(Image*, Point, Image*, Point, Font*, char*, Rune*, int, Rectangle, Image*, Point, Drawop);
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extern Point stringsubfont(Image*, Point, Image*, Subfont*, char*);
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extern int bezier(Image*, Point, Point, Point, Point, int, int, int, Image*, Point);
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extern int bezierop(Image*, Point, Point, Point, Point, int, int, int, Image*, Point, Drawop);
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extern int bezspline(Image*, Point*, int, int, int, int, Image*, Point);
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extern int bezsplineop(Image*, Point*, int, int, int, int, Image*, Point, Drawop);
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extern int bezsplinepts(Point*, int, Point**);
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extern int fillbezier(Image*, Point, Point, Point, Point, int, Image*, Point);
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extern int fillbezierop(Image*, Point, Point, Point, Point, int, Image*, Point, Drawop);
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extern int fillbezspline(Image*, Point*, int, int, Image*, Point);
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extern int fillbezsplineop(Image*, Point*, int, int, Image*, Point, Drawop);
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extern void ellipse(Image*, Point, int, int, int, Image*, Point);
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extern void ellipseop(Image*, Point, int, int, int, Image*, Point, Drawop);
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extern void fillellipse(Image*, Point, int, int, Image*, Point);
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extern void fillellipseop(Image*, Point, int, int, Image*, Point, Drawop);
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extern void arc(Image*, Point, int, int, int, Image*, Point, int, int);
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extern void arcop(Image*, Point, int, int, int, Image*, Point, int, int, Drawop);
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extern void fillarc(Image*, Point, int, int, Image*, Point, int, int);
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extern void fillarcop(Image*, Point, int, int, Image*, Point, int, int, Drawop);
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extern void border(Image*, Rectangle, int, Image*, Point);
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extern void borderop(Image*, Rectangle, int, Image*, Point, Drawop);
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/*
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* Font management
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*/
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extern Font* openfont(Display*, char*);
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extern Font* buildfont(Display*, char*, char*);
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extern void freefont(Font*);
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extern Font* mkfont(Subfont*, Rune);
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extern int cachechars(Font*, char**, Rune**, ushort*, int, int*, char**);
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extern void agefont(Font*);
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extern Subfont* allocsubfont(char*, int, int, int, Fontchar*, Image*);
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extern Subfont* lookupsubfont(Display*, char*);
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extern void installsubfont(char*, Subfont*);
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extern void uninstallsubfont(Subfont*);
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extern void freesubfont(Subfont*);
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extern Subfont* readsubfont(Display*, char*, int, int);
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extern Subfont* readsubfonti(Display*, char*, int, Image*, int);
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extern int writesubfont(int, Subfont*);
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extern void _unpackinfo(Fontchar*, uchar*, int);
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extern Point stringsize(Font*, char*);
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extern int stringwidth(Font*, char*);
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extern int stringnwidth(Font*, char*, int);
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extern Point runestringsize(Font*, Rune*);
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extern int runestringwidth(Font*, Rune*);
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extern int runestringnwidth(Font*, Rune*, int);
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extern Point strsubfontwidth(Subfont*, char*);
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extern int loadchar(Font*, Rune, Cacheinfo*, int, int, char**);
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extern char* subfontname(char*, char*, int);
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extern Subfont* _getsubfont(Display*, char*);
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extern Subfont* getdefont(Display*);
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extern void lockdisplay(Display*);
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extern void unlockdisplay(Display*);
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/*
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* Predefined
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*/
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extern uchar defontdata[];
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extern int sizeofdefont;
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extern Point ZP;
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extern Rectangle ZR;
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/*
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* Set up by initdraw()
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*/
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extern Display *display;
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extern Font *font;
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extern Image *screen;
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extern Screen *_screen;
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extern int _cursorfd;
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extern void _setdrawop(Display*, Drawop);
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#define BGSHORT(p) ((p)[0]|((p)[1]<<8))
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#define BGLONG(p) ((p)[0]|((p)[1]<<8)|((p)[2]<<16)|((p)[3]<<24))
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#define BPSHORT(p,v) do{ushort _v_=(v);(p)[0]=_v_;(p)[1]=_v_>>8;}while(0)
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#define BPLONG(p,v) do{ulong _v_=(v);(p)[0]=_v_;(p)[1]=_v_>>8;(p)[2]=_v_>>16;(p)[3]=_v_>>24;}while(0)
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/*
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* Compressed image file parameters and helper routines
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*/
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#define NMATCH 3 /* shortest match possible */
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#define NRUN (NMATCH+31) /* longest match possible */
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#define NMEM 1024 /* window size */
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#define NDUMP 128 /* maximum length of dump */
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#define NCBLOCK 6000 /* size of compressed blocks */
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extern void _twiddlecompressed(uchar*, int);
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extern int _compblocksize(Rectangle, int);
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/* XXX backwards helps; should go */
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extern ulong drawld2chan[];
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extern void drawsetdebug(int);
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#ifdef __cplusplus
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}
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#endif
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#endif
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