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root/radiance/ray/src/hd/rhdriver.h
Revision: 3.6
Committed: Mon Dec 8 18:51:15 1997 UTC (26 years, 3 months ago) by gregl
Content type: text/plain
Branch: MAIN
Changes since 3.5: +1 -0 lines
Log Message:
added command reading from server's stdin

File Contents

# Content
1 /* Copyright (c) 1997 Silicon Graphics, Inc. */
2
3 /* SCCSid "$SunId$ SGI" */
4
5 /*
6 * Header file for holodeck device driver routines.
7 */
8
9 #include "view.h"
10
11 extern struct driver {
12 char *name; /* holodeck name or title */
13 VIEW v; /* preferred view parameters */
14 int hres, vres; /* device resolution */
15 int ifd; /* input file descriptor (for select) */
16 } odev; /* our open device */
17
18 /* dev_input() return flags */
19 #define DEV_SHUTDOWN 01 /* user shutdown request */
20 #define DEV_NEWVIEW 02 /* view change (new view in odev.v) */
21 #define DEV_NEWSIZE 04 /* device resolution change */
22 #define DEV_WAIT 010 /* pause computation and wait for input */
23 #define DEV_RESUME 020 /* resume after pause */
24 #define DEV_REDRAW 040 /* redraw from server */
25 #define DEV_PUTVIEW 0100 /* print out current view */
26
27
28 /************************************************************************
29 * Driver routines (all are required):
30
31
32 void
33 dev_open(nm) : prepare the device
34 char *nm; : appropriate title bar annotation
35
36 Sets fields of odev structure and prepares the display for i/o.
37 The view type, horizontal and vertical view angles and other default
38 parameters in odev.v should also be assigned.
39
40
41 void
42 dev_view(nv) : set display view parameters
43 VIEW *nv; : the new view
44
45 Updates the display for the given view change.
46 Look for nv==&odev.v when making view current after dev_input()
47 returns DEV_NEWVIEW flag.
48
49
50 void
51 dev_value(c, p, v) : register new point of light
52 COLR c; : pixel color (RGBE)
53 FVECT p; : world intersection point
54 FVECT v; : ray direction vector
55
56 Add the given color point to the display output queue.
57
58
59 int
60 dev_flush() : flush the output and prepare for select call
61
62 Updates display, taking any pending action required before select(2) call.
63 Returns non-zero if there is device input available.
64
65
66 int
67 dev_input() : process pending display input
68
69 Called when odev struct file descriptor shows input is ready.
70 Returns flags indicating actions to take in the control process.
71 If the DEV_NEWVIEW or DEV_NEWSIZE flag is returned, the odev
72 structure must be updated beforehand.
73
74
75 void
76 dev_close() : close the display
77
78 Close the display device and free up resources in preparation for exit.
79 Set odev.v.type=0 and odev.hres=odev.vres=0 when done.
80
81
82 ************************************************************************/