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     * Used by graphics systems to store system state per device.
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     * Used by graphics systems to store system state per device.
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     */
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     */
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    GESystemDesc *gesd[MAX_GRAPHICS_SYSTEMS];
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    GESystemDesc *gesd[MAX_GRAPHICS_SYSTEMS];
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};
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};
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/*
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 *  Some line end/join constants
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 */
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typedef enum {
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  GE_ROUND_CAP  = 1,
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  GE_BUTT_CAP   = 2,
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  GE_SQUARE_CAP = 3
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} R_GE_lineend;
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typedef enum {
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  GE_ROUND_JOIN = 1,
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  GE_MITRE_JOIN = 2,
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  GE_BEVEL_JOIN = 3
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} R_GE_linejoin;
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/*
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/*
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 * A structure containing graphical parameters
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 * A structure containing graphical parameters
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 *
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 *
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 * This is how graphical parameters are passed from graphics systems
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 * This is how graphical parameters are passed from graphics systems
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 * to the graphics engine AND from the graphics engine to graphics
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 * to the graphics engine AND from the graphics engine to graphics
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    /*
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    /*
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     * Line characteristics
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     * Line characteristics
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     */
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     */
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    double lwd;          /* Line width (roughly number of pixels) */
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    double lwd;          /* Line width (roughly number of pixels) */
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    int lty;             /* Line type (solid, dashed, dotted, ...) */
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    int lty;             /* Line type (solid, dashed, dotted, ...) */
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    R_GE_lineend lend;   /* Line end */
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    R_GE_linejoin ljoin; /* line join */
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                         /* FIXME: need to add line end/joins */
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    double lmitre;       /* line mitre */
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    /*
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    /*
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     * Text characteristics
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     * Text characteristics
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     */
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     */
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    double cex;          /* Character expansion (font size = fontsize*cex) */
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    double cex;          /* Character expansion (font size = fontsize*cex) */
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    double ps;           /* Font size in points */
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    double ps;           /* Font size in points */
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#define LTY_DOTTED	1 + (3<<4)
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#define LTY_DOTTED	1 + (3<<4)
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#define LTY_DOTDASH	1 + (3<<4) + (4<<8) + (3<<12)
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#define LTY_DOTDASH	1 + (3<<4) + (4<<8) + (3<<12)
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#define LTY_LONGDASH	7 + (3<<4)
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#define LTY_LONGDASH	7 + (3<<4)
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#define LTY_TWODASH	2 + (2<<4) + (6<<8) + (2<<12)
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#define LTY_TWODASH	2 + (2<<4) + (6<<8) + (2<<12)
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R_GE_lineend LENDpar(SEXP value, int ind);
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R_GE_linejoin LJOINpar(SEXP value, int ind);
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void GESetClip(double x1, double y1, double x2, double y2, GEDevDesc *dd);
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void GESetClip(double x1, double y1, double x2, double y2, GEDevDesc *dd);
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void GENewPage(R_GE_gcontext *gc, GEDevDesc *dd);
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void GENewPage(R_GE_gcontext *gc, GEDevDesc *dd);
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void GELine(double x1, double y1, double x2, double y2,
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void GELine(double x1, double y1, double x2, double y2,
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	    R_GE_gcontext *gc, GEDevDesc *dd);
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	    R_GE_gcontext *gc, GEDevDesc *dd);
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void GEPolyline(int n, double *x, double *y,
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void GEPolyline(int n, double *x, double *y,