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gx.h
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gx.h
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/* Copyright (c) 1988,1989,1990,1991 by Brian Doty
See file COPYRIGHT for complete rights and liability information. */
void *galloc(int,char *);
void gree();
void glook();
/* Installation options for the GX package. */
/* HBUFSZ is the size of the metafile output buffer in
number of short integers. The metafile buffer should be as
large as is convenient for the target system. Frames larger
than the buffer will get bufferred into the meta file on disk,
when BUFOPT is 1. Otherwise multiple buffers of size HBUFSZ
will be allocated as needed. */
#define HBUFSZ 100000L
#define BUFOPT 0
/*------------------------------------------------------------------------------
New projections: Mollweide Projection (mollweide)
Orthographic Projection (orthogr)
Changes in GrADS C source code files:
gxwmap.c
gagx.c
gauser.c
gx.h
DKRZ
10.08.95 Karin Meier ([email protected])
------------------------------------------------------------------------------*/
#define pi 3.14159265358979
static float lomin, lomax, lamin, lamax;
/* Default directory containing the stroke and map data sets.
User can override this default via setenv GADDIR */
static char *datad = "/usr/local/lib/grads";
/* Option flag. If 0, map data set is only read once into a
dynamically allocated memory area. The memory is held onto
for the next call (about 35K). If 1, the memory is allocated for
each call and the map data set is read each time. */
/* Lowres map only */
#define MAPOPT 0
/* Spacing to use for shading to get a 'solid' fill when drawing
lines side by side at lineweight 3. */
#define SDIFF 0.005
/* Structure for setting up map projections. Used to call
map projection routines. */
struct mapprj {
float lnmn,lnmx,ltmn,ltmx; /* Lat,lon limits for projections */
float lnref; /* Reference longitude */
float ltref1,ltref2; /* Reference latitudes */
float xmn,xmx,ymn,ymx; /* Put map in this page area */
float axmn,axmx,aymn,aymx; /* Actual page area used by proj. */
};
/* Structure for holding info on displayed widgets. */
struct gobj {
int type; /* Basic type of object. -1 - end of list;
0 - none; 1 - btn; 2 - rbb; 3 = popm */
int i1,i2,j1,j2; /* Extent of object */
int mb; /* Mouse button that invokes object */
union tobj {
struct gbtn *btn; /* Pointer to button struct */
struct grbb *rbb; /* Pointer to rubber-band struct */
struct gdmu *dmu; /* Pointer to drop menu struct */
} iob;
};
/* Structure for holding information about GrADS button widgets */
/* Also used for popmenus, which display on the screen the same
as buttons */
struct gbtn {
int num; /* Button number (-1, unset) */
float x,y,w,h; /* Button location, size */
int ilo,ihi,jlo,jhi;
int fc,bc,oc1,oc2,ftc,btc,otc1,otc2; /* Colors */
int thk; /* Thickness of outline */
int state; /* Toggled or not? */
int len; /* Length of string */
char *ch; /* String content of btn */
};
/* Structure holds info on rubber-band regions */
struct grbb {
int num; /* Region number (-1, unset) */
int mb; /* Mouse button specific */
float xlo,xhi,ylo,yhi; /* Rubber band region */
int type; /* 0 for box, 1 for line */
};
/* Structure for info on drop menus */
struct gdmu {
int num; /* Menu number */
int casc; /* Anchored? */
float x,y,w,h; /* Header button loc,size */
int ilo,ihi,jlo,jhi;
int fc,bc,oc1,oc2; /* Colors of base */
int tfc,tbc,toc1,toc2; /* Colors of selected base */
int bfc,bbc,boc1,boc2; /* Colors of box */
int soc1,soc2; /* Colors of selected item */
int thk; /* Thickness of outlines */
int len; /* Length of string */
char *ch; /* String content of menu */
};
/* GrADS event queue. This queue is built as the mouse button
is clicked, and is cleared by a GrADS clear event. Events
are removed from the queue via the 'q pos' command. */
struct gevent {
struct gevent *forw; /* Forward pointer */
float x, y; /* X and Y position of cursor */
int mbtn; /* Mouse button pressed */
int type; /* Type of event */
int info[10]; /* Integer info about event */
float rinfo[4]; /* Floating point info about event */
};
/* Structure for passing information on map plotting
options */
struct mapopt {
int dcol,dstl,dthk; /* Default color, style, thickness */
int *mcol,*mstl,*mthk; /* Arrays of map line attributes */
float lnmin,lnmax,ltmin,ltmax; /* Plot bounds */
char *mpdset; /* Map data set name */
};
/* Function prototypes for GX library routines */
/* Functions in gxdev:
gxdbgn: Initialize hardware
gxdend: Terminate hardware
gxdfrm: New frame
gxdcol: New color
gxadcl: Assign rgb color
gxdwid: New line width
gxdmov: Move pen
gxddrw: Draw
gxdrec: Filled rectangle
gxdsgl: Set single buffer mode
gxddbl: Set doulbe buffer mode
gxdswp: Swap buffers
gxqfil: Query availability of hardware polygon fill
gxdfil: Hardware Polygon fill
gxdxsz: Resize X Window (X only)
gxdbtn: Get pointer pos at mouse btn press
gxgrey: Set grey scale
gxdbck: Set hardware background/foreground
gxrswd: Reset Widget Structures
gxcpwd: Copy widgets on swap in double buffer mode
gxevbn: Handle button press event
gxevrb: Handle rubber-band event
gxdptn: Set fill pattern
*/
void gxdbgn (float, float);
void gxdend (void);
void gxdfrm (int);
void gxdcol (int);
void gxdacl (int, int, int, int);
void gxdwid (int);
void gxdmov (float, float);
void gxddrw (float, float);
void gxdrec (float, float, float, float);
void gxdsgl (void);
void gxdbl (void);
void gxdswp (void);
int gxqfil (void);
void gxdfil (float *, int);
void gxdfl2 (float *, int);
void gxdxsz (int, int);
void gxgrey (int);
void gxdbck (int);
int gxdeve (int);
void gxdbtn (int, float *, float *, int *, int *, int *, float *);
void gxdpbn (int, struct gbtn *, int, int, int);
void gxdrmu (int, struct gdmu *, int, int);
void gxdsfn (void);
void gxdtxt (char *, float, float);
void gxdcf (void);
int gxdfsw (char *, int, int);
void gxdrdw (void);
void gxrdrw (int);
void gxrswd (int);
void gxcpwd (void);
void gxevbn (struct gevent *, int);
void gxevrb (struct gevent *, int, int, int);
int gxevdm (struct gevent *, int, int, int);
int gxpopdm(struct gdmu *, int, int, int);
void gxdrbb (int, int, float, float, float, float,int);
char *gxdlg (char *);
void gxdptn (int, int, int);
void gxdssv (int);
void gxdssh (int);
void gxdsfr (int);
/* Routines in gxsubs:
gxstrt: Initialize graphics output
gxend: Terminate graphics output
gxfrme: Start new frame
gxcolr: Set color attribute
gxacol: Assign new rgb to color number from 16-99
gxbckg: Set background color
gxqbck: Query background color
gxwide: Set line width attribute
gxmove: Move to X, Y
gxdraw: Draw solid line to X, Y using current color and linewidth
gxstyl: Set linestyle
gxplot: Move or draw using linestyles
gxclip: Set clipping region
gxchin: Initialize stroke font
gxchpl: Draw character(s)
gxtitl: Draw centered title
gxvpag: Set up virtual page
gxvcon: Do virtual page scaling
gxscal: Set up level 1 (linear) scaling
gxproj: Set up level 2 (projection) scaling
gxgrid: Set up level 3 (grid) scaling
gxback: Set up level 1 to level 2 back transform
gxconv: Convert coordinates to level 0 (hardware)
gxxy2w: Convert level 0 to level 2
gxcord: Convert array of coordinates to level 0
gxrset: Reset projection or grid level scaling
gxrecf: Draw filled rectangle
gxqclr: Query current color value
gxqstl: Query current linestyle value
gxmark: Draw marker
gxfill: Polygon fill
bdterp: Clipping Boundry Interpolation
gxgsym: Get env var
gxgnam: Get full path name
gxptrn: Set fill pattern
*/
void gxstrt (float, float,int);
void gxend (void);
void gxfrme (int);
void gxsfrm (void);
void gxcolr (int);
void gxacol (int, int, int, int);
void gxbckg (int);
int gxqbck (void);
void gxwide (int);
void gxmove (float, float);
void gxdraw (float, float);
void gxstyl (int);
void gxplot (float, float, int);
void gxclip (float, float, float, float);
void gxtitl (char *, float, float, float, float, float);
void gxvpag (float, float, float, float, float, float);
void gxvcon (float, float, float *, float *);
void gxppvp (float, float, float *, float *);
void gxscal (float, float, float, float, float, float, float, float);
void gxproj ( void (*) (float, float, float*, float*) );
void gxgrid ( void (*) (float, float, float*, float*) );
void gxback ( void (*) (float, float, float*, float*) );
void gxconv (float, float, float *, float *, int);
void gxxy2w (float, float, float *, float *);
void gxgrmp (float, float, float *, float *);
void gxcord (float *, int, int);
void gxpoly (float *, int, int);
void gxrset (int);
void gxrecf (float, float, float, float);
int gxqclr (void);
int gxqstl (void);
void gxmark (int, float, float, float);
void gxfill (float *, int);
void bdterp (float, float, float, float, float *, float *);
char *gxgsym(char *);
char *gxgnam(char *);
void gxptrn (int, int, int);
/* Gxmeta routines handle graphics buffering and metafile output.
Routines in gxmeta:
gxhopt: Specify buffering option before open
gxhnew: Buffering initialization on startup
gxhbgn: Enable hardcopy (metafile) output
hout0: Buffer 0 arg metafile command
hout1: Buffer one arg metafile command
hout2: Buffer two arg metafile command
hout4: Buffer four arg metafile command
hout2i: Buffer two arg int metafile command
hout3i: Buffer three arg int metafile command
hout4i: Buffer four arg int metafile command
hfull: Deal with full metafile memory buffer
gxhprt: Handle print command (output to metafile)
gxhwri: Write buffer to metafile
gxhend: Close output metafile
gxhfrm: Handle new frame action
gxhdrw: Handle redraw operation
*/
void gxhopt (int);
void gxhnew (float, float);
int gxhbgn (char *);
void hout0 (int);
void hout1 (int, int);
void hout2 (int, float, float);
void hout4 (int, float, float, float, float);
void hout2i (int, int, int);
void hout3i (int, int, int, int);
void hout4i (int, int, int, int, int);
void hfull (void);
void gxhprt (void);
int gxhwri (void *, int);
void gxhend (void);
void gxhfrm (int);
void gxhdrw (int);
/* Routines in gxchpl:
gxchii: Initialize character plotting
gxchdf: Set default font
gxchpl: Plot character string
gxchln: Determine length (in plotting units) of a string
gxchgc: Get character info given character and font
gxchrd: Read in a font
*/
void gxchii (void);
void gxchdf (int);
void gxchpl (char *, int, float, float, float, float, float);
int gxchln (char *, int, float, float *);
char *gxchgc (int, int, int *);
int gxchrd (int);
/* Routine in gxcntr:
gxclmn: Specify minimum distance between labels
gxclev: Plot contour at specified value
gxcflw: Follow a contour segment
gxcspl: Spline fit a contour segment
gxclab: Draw buffered contour labels.
pathln: Find shortest col path through grid box
gxcrel: Release storage used by the contouring system
*/
void gxclmn (float);
void gxclev (float *, int, int, int, int, int, int,
float, float, char *, int, int);
void gxcflw (int, int, int, int);
void gxcspl (void);
void gxclab (float,int,int);
int pathln (float, float, float, float);
void gxcrel (void);
/* Routines in gxshad -- color filled contour routine:
gxshad -- do color filled contours
gxsflw -- Follow shade area boundries
spathl -- Calculate col path lengths
undcol -- Determine undefined-grid-side col characteristics
putxy -- Buffer current coordinate
shdcmp -- Compress contour line
shdmax -- Determine max or min interior
*/
void gxshad ( float *, int, int, float *, int *, int, float);
int gxsflw (int, int, int);
int spathl (float, float, float, float);
int undcol (int, int);
int putxy (float, float);
void shdcmp (void);
int shdmax (void);
/* routines in gxstrm: gxstrm (do streamlines) */
void gxstrm (float *, float *, float *, int, int, float, float, float,
int, float *, int *, int, int);
void strmar (float, float, float, float);
int gxshdc (float *, int *, int, float);
/* Routines in gxwmap:
gxwmap: Draw world map
gxnmap: Draw medium res n.am. map
gxmout: Output section of world map
gxnste: Set up projection scaling for north polar stereographic
gxnpst: Scaling routine for north polar stereographic projection
gxaarw: Direction adjustment for map projection
gxgmap: Medium and hi res map drawer
gxhqpt: Plot quadrant of medium or hi res map
*/
void gxdmap (struct mapopt *);
void gxwmap (float, float, float, float);
void gxnmap (float, float, float, float);
void gxmout (int, float, float, float, float, float);
int gxltln (struct mapprj *);
int gxscld (struct mapprj *, int, int);
int gxnste (struct mapprj *);
void gxnpst (float, float, float *, float *);
void gxnrev (float, float, float *, float *);
int gxsste (struct mapprj *);
void gxspst (float, float, float *, float *);
void gxsrev (float, float, float *, float *);
float gxaarw (float, float);
void gxgmap (int, int, float, float, float, float);
void gxhqpt (int, int, int, float, float, float, float, float);
int gxrobi (struct mapprj *);
void gxrobp (float, float, float *, float *);
void gxrobb (float, float, float *, float *);
/*---- DKRZ: appending new projections --- 10.08.95 Karin Meier
gxmoll: Setup scaling Mollweide projection
gxortg: Setup scaling Orthographic projection
---- DKRZ: end of new projections --- [email protected] ----*/
/*---- Mollweide Projection ----*/
int gxmoll (struct mapprj *);
void gxmollp (float, float, float *, float *);
void gxmollb (float, float, float *, float *);
/*---- Orthographic Projection ----*/
int gxortg (struct mapprj *);
void gxortgp (float, float, float *, float *);
void gxortgb (float, float, float *, float *);
/*------- DKRZ appendingd end ------*/
/*---- Lambert Conformal Projection ----*/
int gxlamc (struct mapprj *);
void gxlamcp (float, float, float *, float *);
void gxlamcb (float, float, float *, float *);
/*------- DKRZ appendingd end ------*/