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root/radiance/ray/src/hd/rhdisp.h
Revision: 3.4
Committed: Thu Nov 20 18:04:59 1997 UTC (26 years, 11 months ago) by gregl
Content type: text/plain
Branch: MAIN
Changes since 3.3: +1 -0 lines
Log Message:
added noop function to recover from vain DR_ATTEN

File Contents

# User Rev Content
1 gregl 3.1 /* Copyright (c) 1997 Silicon Graphics, Inc. */
2    
3     /* SCCSid "$SunId$ SGI" */
4    
5     /*
6     * Header for holodeck display drivers.
7     */
8    
9     /* display requests */
10 gregl 3.4 #define DR_NOOP 0 /* to release from vain DR_ATTEN */
11 gregl 3.2 #define DR_BUNDLE 1 /* bundle request */
12     #define DR_ATTEN 2 /* request for attention */
13     #define DR_SHUTDOWN 3 /* shutdown request */
14     #define DR_NEWSET 4 /* new bundle set */
15 gregl 3.1 #define DR_ADDSET 5 /* add to current set */
16     #define DR_DELSET 6 /* delete from current set */
17    
18     /* server responses */
19 gregl 3.3 #define DS_BUNDLE 7 /* computed bundle */
20     #define DS_ACKNOW 8 /* acknowledge request for attention */
21     #define DS_SHUTDOWN 9 /* end process and close connection */
22     #define DS_ADDHOLO 10 /* register new holodeck */
23     #define DS_STARTIMM 11 /* begin immediate bundle set */
24     #define DS_ENDIMM 12 /* end immediate bundle set */
25 gregl 3.1
26     /*
27     * Normally, the server channel has priority, with the display process
28     * checking it frequently for new data. However, when the display process
29     * makes a request for attention (DR_ATTEN), the server will finish its
30     * current operations and flush its buffers, sending an acknowledge
31     * message (DS_ACKNOW) when it's done. This then allows the
32     * display process to send a long request to the holodeck server.
33     * Priority returns to normal after the following request.
34     */
35    
36 gregl 3.3 #ifndef BIGREQSIZ
37     #define BIGREQSIZ 512 /* big request size (bytes) */
38     #endif
39    
40 gregl 3.1 typedef struct {
41     int2 type; /* message type */
42     int4 nbytes; /* number of additional bytes */
43     } MSGHEAD; /* message head */