-typedef struct raster_st RASTER;
-
-/*-------------------------------------------------------------------------*/
-
-typedef double GRFMTX_2D[3][3];
-typedef double GRFMTX_3D[4][4];
-
-
-/* circle.c */
-void circle(const double r);
-void drawarc(double start, double stop, const double r);
-/* cliprect.c */
-int cliprect(double *x1, double *y1, double *x2, double *y2, const double rect[4]);
-/* crt_line.c */
-void crt_line(int x1, int y1, int x2, int y2, int color);
-int prtline(int func, int x1, int y1, int x2, int y2, int arg1, int arg2);
-void crt_line_style(int style);
-/* crt_wdot.c */
-void crt_wdot(int x, int y, int c);
-void ega_wdot(int x, int y, int c);
-void prtdot(int x, int y, int c);
-void prtndc(void);
-void cpix_set(int x, int y, int c);
-void cpix_init(void);
-void cpix_set_wrt_mode(int mode);
-void cpix_calc_addr(void);
-void cpix_set_addr(int addr);
-void cpix_inc_col(void);
-int cpix_get_addr(void);
-void cpix_term(void);
-void cpix_setcolor(int c);
-void cpix_set_at_addr(int addr, int c);
-void cpix_inc_row(void);
-void cpix_set_color(int c);
-/* ctm.c */
-int ctm_xlat_pre_2(double x, double y);
-int ctm_xlat_post_2(double x, double y);
-int ctm_scale_pre_2(double sx, double sy);
-int ctm_scale_post_2(double sx, double sy);
-int ctm_rotate_pre_2(double theta);
-int ctm_rotate_post_2(double theta);
-int ctm_shear_pre_2(double shrx, double shry);
-int ctm_shear_post_2(double shrx, double shry);
-int xlat_gmtx_2(GRFMTX_2D m, double x, double y);
-int scale_gmtx_2(GRFMTX_2D m, double sx, double sy);
-int shear_gmtx_2(GRFMTX_2D m, double shrx, double shry);
-int rotate_gmtx_2(GRFMTX_2D m, double theta);
-int ident_gmtx_2(GRFMTX_2D m);
-int mult_gmtx_2(GRFMTX_2D a, GRFMTX_2D b, GRFMTX_2D c);
-int invert_gmtx_2(GRFMTX_2D a, GRFMTX_2D b);
-double determ_gmtx_2(GRFMTX_2D a);
-/* drawbox.c */
-int drawbox(double xmin, double ymin, double xmax, double ymax);
-/* gp.c */
-int gptrace(int state);
-int viewprt3(double xmin, double ymin, double zmin, double xmax, double ymax, double zmax);
-int window3(double xmin, double ymin, double xmax, double ymax);
-int setproj(int pr, double x, double y, double z);
-int setvrp(double x, double y, double z);
-int setvpn(double x, double y, double z);
-int setvup(double x, double y, double z);
-int viewdepth(double front, double back);
-int gpfrontclip(int on_off);
-int gpbackclip(int on_off);
-int calcnper(void);
-int calcnpar(void);
-int calcrot(double rot[5][5]);
-int calcpertrans(void);
-int calcpartrans(void);
-int matident(double mtx[5][5]);
-int matmult(double premtx[5][5], double postmtx[5][5], double result[5][5]);
-int crossprod(struct point *v, struct point *w, struct point *result);
-int transform(double mtx[5][5], double *x, double *y, double *z);
-int homotrans(double mtx[5][5], double *x, double *y, double *z, double *w);
-int moveabs3(double x, double y, double z);
-int moverel3(double xr, double yr, double zr);
-int lineabs3(double x, double y, double z);
-int linerel3(double xr, double yr, double zr);
-int drawline(double xinput, double yinput, double zinput);
-int mastertondc(double *x, double *y, double *z);
-int checkchange(void);
-int initgrf3(void);
-int termgrf3(void);
-int matwrite(double mtx[5][5]);
-int pyr_edge(double x, double y, double z, int *pos);
-int clippyramid(double *x1, double *y1, double *z1, double *x2, double *y2, double *z2, int *accept);
-int cube_edge(double x, double y, double z, int *pos);
-int clipcube(double *x1, double *y1, double *z1, double *x2, double *y2, double *z2, int *accept);
-/* pickbox.c */
-int pickbox(int dev, int *xmin, int *ymin, int *xmax, int *ymax, int xtab[], int ytab[]);
-/* pickloc.c */
-int pickloc(int dev, int *xloc, int *yloc, int xtab[], int ytab[]);
-/* pixblock.c */
-int readblock(char array[], int x1, int y1, int x2, int y2);
-int writeblock(char array[], int x1, int y1, int mode);
-char *allocblock(int x1, int y1, int x2, int y2);
-/* readloc.c */
-int readloc(int dev, int *x, int *y);
-int loc_to_ndc(int xloc, int yloc, float *xndc, float *yndc);
-int readbutt(int dev);
-/* sgp.c */
-int gp_init_2(void);
-int window2(double xmin, double ymin, double xmax, double ymax);
-int window_2(double xmin, double ymin, double xmax, double ymax);
-int viewprt2(double xmin, double ymin, double xmax, double ymax);
-int viewport_2(double xmin, double ymin, double xmax, double ymax);
-int framevpt(void);
-int calc_wc_to_ndc(void);
-int calc_ndc_to_mc(void);
-int wc_to_ndc(double xw, double yw, double *xn, double *yn);
-int ndc_to_wc(double xn, double yn, double *xw, double *yw);
-int color(int icol);
-int linestyle(int style);
-int line_abs_2(double x, double y);
-int lineabs2(double x, double y);
-int move_abs_2(double x, double y);
-int moveabs2(double x, double y);
-int line_rel_2(double x, double y);
-int linerel2(double x, double y);
-int move_rel_2(double x, double y);
-int moverel2(double x, double y);
-int draw_text(char *message);
-int drawtext(char *message);
-int polylnabs2(double x[], double y[], int n);
-int markabs2(double x, double y);
-int markrel2(double x, double y);
-int pntabs2(double x, double y);
-int pntrel2(double x, double y);
-int ctm_clr_2(void);
-int ctm_get_2(GRFMTX_2D m);
-int ctm_set_2(GRFMTX_2D m);
-int ctm_pre_mult_2(GRFMTX_2D m);
-int ctm_post_mult_2(GRFMTX_2D m);
-/* sgpdrive.c */
-int initgrf2(void);
-int initdevice(int dev, int mode, int xsize, int ysize);
-int opendevice(int dev);
-int closedevice(int dev);
-int termdevice(int dev);
-void stylus(double x, double y, int beam);
-int pntndc(double x, double y);
-int markndc(double x, double y);
-GRFSTATE *inqstate(void);
-int gp_set_aspect(int dev, double asp);
-void setlinestyle(int style);
-int setlinewidth(int wid);
-DEVICE *inqdev(int dev);
-int settext(double width, double height, double textangle, int font);
-int settextclr(int fore, int back);
-int setcolor(int fore);
-int setbackg(int back);
-int initmarker(int marker, int color);
-int settextdir(int direction);
-int charsize(double wid, double height);
-int textangle(double angle);
-int drivtext(char *message);
-int termgrf2(void);
-int flushdevice(int dev);
-/* sgptext.c */
-int wrtsymbol(int sym, int x, int y, DEVICE *dev);
-int wrtchar(int ch, int x, int y, CHARSPEC *cspec, DEVICE *dev);
-int wrttext(char txtstr[], int x, int y, CHARSPEC *cspec, DEVICE *dev);
-void crtcolor(int mode, int *f, int *b);
-/* trackloc.c */
-int trackloc(int dev, int *xloc, int *yloc, int (*loc_on)(int x, int y), int (*loc_off)(int x, int y));