ViewVC Help
View File | Revision Log | Show Annotations | Download File | Root Listing
root/radiance/ray/src/hd/rhdisp.h
Revision: 3.15
Committed: Mon Jul 14 22:24:00 2003 UTC (21 years, 4 months ago) by schorsch
Content type: text/plain
Branch: MAIN
Changes since 3.14: +13 -1 lines
Log Message:
Instrumented headers against multiple inclusion and for use from C++.
Moved includes in headers out of "C" scope.

File Contents

# Content
1 /* RCSid: $Id: rhdisp.h,v 3.14 2003/06/20 00:25:49 greg Exp $ */
2 /*
3 * Header for holodeck display drivers.
4 */
5 #ifndef _RAD_RHDISP_H_
6 #define _RAD_RHDISP_H_
7
8 #ifdef __cplusplus
9 extern "C" {
10 #endif
11
12 /* display requests */
13 #define DR_NOOP 0 /* to release from vain DR_ATTEN */
14 #define DR_BUNDLE 1 /* lone bundle request */
15 #define DR_ATTEN 2 /* request for attention */
16 #define DR_SHUTDOWN 3 /* shutdown request */
17 #define DR_NEWSET 4 /* new bundle set */
18 #define DR_ADDSET 5 /* add to current set */
19 #define DR_ADJSET 6 /* adjust set quantities */
20 #define DR_DELSET 7 /* delete from current set */
21 #define DR_KILL 8 /* kill rtrace process(es) */
22 #define DR_RESTART 9 /* restart rtrace */
23 #define DR_CLOBBER 10 /* clobber holodeck */
24 #define DR_VIEWPOINT 11 /* set desired eye position */
25
26 /* server responses */
27 #define DS_BUNDLE 32 /* computed bundle */
28 #define DS_ACKNOW 33 /* acknowledge request for attention */
29 #define DS_SHUTDOWN 34 /* end process and close connection */
30 #define DS_ADDHOLO 35 /* register new holodeck */
31 #define DS_STARTIMM 36 /* begin immediate bundle set */
32 #define DS_ENDIMM 37 /* end immediate bundle set */
33 #define DS_OUTSECT 38 /* render from outside sections */
34 #define DS_EYESEP 39 /* eye separation distance */
35
36 /*
37 * Normally, the server channel has priority, with the display process
38 * checking it frequently for new data. However, when the display process
39 * makes a request for attention (DR_ATTEN), the server will finish its
40 * current operations and flush its buffers, sending an acknowledge
41 * message (DS_ACKNOW) when it's done. This then allows the
42 * display process to send a long request to the holodeck server.
43 * Priority returns to normal after the following request.
44 */
45
46 #ifndef BIGREQSIZ
47 #define BIGREQSIZ 512 /* big request size (bytes) */
48 #endif
49
50 typedef struct {
51 int16 type; /* message type */
52 int32 nbytes; /* number of additional bytes */
53 } MSGHEAD; /* message head */
54
55 /*
56 * The display process is started with three arguments. The first argument
57 * is the short name of the holodeck file, appropriate for window naming, etc.
58 * The second and third arguments are the file descriptor numbers assigned to
59 * the server's standard output and input, respectively. The stdin and stdout
60 * of the display process are used for normal communication with the server,
61 * and are connected to pipes going each way. It is entirely appropriate
62 * for the display process to borrow the server's stdin and stdout for reading
63 * and writing user commands from the list in rhdriver.h. If standard input
64 * is not available for reading, then a descriptor of -1 will be passed.
65 * The standard output will always be available for writing, though it
66 * may go to /dev/null.
67 */
68
69 #ifdef __cplusplus
70 }
71 #endif
72 #endif /* _RAD_RHDISP_H_ */
73