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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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#undef NOPROTO |
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#define NOPROTO 1 |
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greg |
3.1 |
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greg |
3.2 |
#include "color.h" |
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#define GD_TYPELEN 1 /* a type is 1 byte in length */ |
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/* argument types */ |
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#define GD_TY_END 0 /* argument list terminator */ |
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#define GD_TY_NAM 1 /* 8-byte (max.) identifier */ |
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#define GD_TY_INT 2 /* 4-byte integer */ |
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#define GD_TY_FLT 3 /* 4-byte IEEE float */ |
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#define GD_TY_DBL 4 /* 8-byte IEEE double */ |
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#define GD_TY_CLR 5 /* 4-byte RGBE color value */ |
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#define GD_TY_ARR 6 /* 5-byte array prefix */ |
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#define GD_TY_STR 7 /* nul-terminated string */ |
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#define GD_TY_ARG 8 /* 1-byte argument list prefix */ |
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#define GD_TY_ERR 9 /* 1-byte error code */ |
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#define GD_NTYPES 10 /* number of argument types */ |
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/* stream argument lengths */ |
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#define GD_ARGLEN {0,8,4,4,8,4,5,-1,1,1} |
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/* array element lengths (0 == unsupported) */ |
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#define GD_ELELEN {0,8,4,4,8,4,sizeof(GDarg),sizeof(char *),0,0} |
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#define GD_MAXID 8 /* maximum id. length (must be 8) */ |
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/* |
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* A request consists of an argument list, the first of |
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* which is always the request name as an 8-char (max.) string. |
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* The types of the following arguments must match the required |
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* arguments of the display request, or an error will result. |
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* |
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* Only functions return values, and they return them as a argument |
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* list on the client's receiving connection. It is up to the client |
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* program to keep track of its function calls and which values correspond |
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* to which request functions. |
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* |
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* An error is indicated with a special GD_TY_ERR code on the receiving |
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* connection, and usually indicates something fatal. |
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*/ |
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/* error codes */ |
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#define GD_ER_UNRECOG 0 /* unrecognized request */ |
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#define GD_ER_ARGTYPE 1 /* argument type mismatch */ |
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#define GD_ER_ARGMISS 2 /* argument(s) missing */ |
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#define GD_NERRS 3 /* number of errors */ |
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/* request argument */ |
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greg |
3.1 |
typedef struct { |
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greg |
3.2 |
BYTE typ; /* argument type */ |
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BYTE atyp; /* array subtype if typ==GD_TY_ARR */ |
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union { |
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char n[GD_MAXID]; /* 8-char (max.) id. */ |
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int4 n1, n2; /* used for ID comparison */ |
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int4 i; /* 4-byte integer */ |
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float f; /* 4-byte IEEE float */ |
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double d; /* 8-byte IEEE double */ |
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COLR c; /* 4-byte RGBE color */ |
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struct array { |
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int4 l; /* length */ |
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MEM_PTR p; /* values */ |
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} a; /* array */ |
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char *s; /* nul-terminated string */ |
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} v; /* argument value */ |
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} GDarg; |
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greg |
3.1 |
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greg |
3.2 |
/* a request and its arguments */ |
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typedef struct gdreq { |
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struct gdreq *next; /* next request in list */ |
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short argc; /* number of arguments */ |
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GDarg argv[1]; /* argument list (expandable) */ |
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} GDrequest; |
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greg |
3.1 |
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greg |
3.2 |
#define GD_HSIZ 123 /* hash table size (prime) */ |
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extern GDrequest *gdProTab[GD_HSIZ]; /* registered prototypes */ |
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#define gdHash(a) ((a)->v.n1 ^ (a)->v.n2) |
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#define gdFree(p) free((MEM_PTR)(p)) |
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typedef struct { |
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int xres, yres; /* display window size (renderable area) */ |
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} GDserv; /* display structure */ |
