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greg |
3.1 |
/* Copyright (c) 1997 Regents of the University of California */
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/* SCCSid "$SunId$ LBL" */
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/*
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greg |
3.2 |
* Header file for OpenGL display process.
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greg |
3.1 |
*/
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greg |
3.2 |
#ifndef MEM_PTR
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#define MEM_PTR char *
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#endif
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#ifndef int4
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#define int4 int /* assume 32-bit integers */
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#endif
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greg |
3.1 |
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greg |
3.3 |
/* request types */
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#define GD_R_ViewSync 0 /* synchronize current view */
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#define GD_R_SetView 1 /* set new view parameters */
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#define GD_R_AddBg 2 /* add background rectangle */
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#define GD_R_DelBg 3 /* delete background rectangle */
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#define GD_R_Error 4 /* error to report */
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#define GD_R_Init 5 /* initialize connection */
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#define GD_NREQ 6 /* number of requests */
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greg |
3.2 |
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/* error codes */
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greg |
3.3 |
#define GD_OK 0 /* normal return value */
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#define GD_E_UNRECOG 1 /* unrecognized request */
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#define GD_E_ARGMISS 2 /* missing argument(s) */
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#define GD_E_NOMEMOR 3 /* out of memory */
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#define GD_E_CONNECT 4 /* can't establish connection */
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#define GD_NERRS 5 /* number of errors */
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greg |
3.2 |
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greg |
3.3 |
extern char *gdErrMsg[GD_NERRS]; /* our error message list */
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greg |
3.2 |
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greg |
3.3 |
/* request structure */
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#define GD_ARG0 4 /* minimum argument length */
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greg |
3.1 |
typedef struct {
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greg |
3.3 |
short type; /* request type */
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unsigned int4 id; /* unique identifier */
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unsigned int4 alen; /* argument buffer length */
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unsigned char args[GD_ARG0]; /* followed by the actual arguments */
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} GDrequest; /* a GL display request */
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greg |
3.1 |
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greg |
3.3 |
typedef struct {
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int cno; /* connection number */
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int xres, yres; /* display window size (renderable area) */
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int fdout; /* send descriptor */
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FILE *fpin; /* receive stream */
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} GDconnect; /* display server/client connection */
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greg |
3.1 |
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greg |
3.3 |
/* argument lengths */
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#define GD_L_REAL 5 /* reals are 5 bytes */
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#define gdStrLen(s) (strlen(s)+1) /* strings are nul-terminated */
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greg |
3.2 |
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#define gdFree(p) free((MEM_PTR)(p))
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greg |
3.3 |
extern GDrequest *gdRecvRequest();
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extern GDconnect *gdOpen();
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extern int4 gdGetInt();
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extern double gdGetReal();
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