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gregl |
3.1 |
/* Copyright (c) 1997 Silicon Graphics, Inc. */
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/* SCCSid "$SunId$ SGI" */
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/*
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* Header file for holodeck device driver routines.
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*/
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#include "view.h"
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extern struct driver {
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char *name; /* holodeck name or title */
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VIEW v; /* preferred view parameters */
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int hres, vres; /* device resolution */
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int ifd; /* input file descriptor (for select) */
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} odev; /* our open device */
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gregl |
3.11 |
extern int imm_mode; /* bundles are being delivered immediately */
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gregl |
3.8 |
/* user commands */
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#define DC_SETVIEW 0 /* set the view */
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#define DC_GETVIEW 1 /* print the current view */
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#define DC_LASTVIEW 2 /* restore previous view */
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#define DC_PAUSE 3 /* pause the current calculation */
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#define DC_RESUME 4 /* resume the calculation */
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gregl |
3.9 |
#define DC_REDRAW 5 /* redraw from server */
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#define DC_KILL 6 /* kill rtrace process(es) */
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#define DC_RESTART 7 /* restart rtrace process(es) */
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#define DC_CLOBBER 8 /* clobber holodeck file */
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#define DC_QUIT 9 /* quit the program */
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gregl |
3.1 |
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gregl |
3.9 |
#define DC_NCMDS 10 /* number of commands */
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gregl |
3.1 |
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gregl |
3.8 |
/* dev_input() returns flags from above */
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#define DFL(dc) (1<<(dc))
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#define CTRL(c) ((c)-'@')
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/* commands entered in display window */
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gregl |
3.10 |
#define DV_INIT {'\0','v','l','p','\r',CTRL('L'),'K','R','C','q'}
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gregl |
3.8 |
/* commands entered on stdin */
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#define DC_INIT {"VIEW=","where","last","pause","resume","redraw",\
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gregl |
3.9 |
"kill","restart","clobber","quit"}
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gregl |
3.8 |
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gregl |
3.1 |
/************************************************************************
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* Driver routines (all are required):
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void
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dev_open(nm) : prepare the device
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char *nm; : appropriate title bar annotation
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Sets fields of odev structure and prepares the display for i/o.
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The view type, horizontal and vertical view angles and other default
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parameters in odev.v should also be assigned.
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gregl |
3.7 |
int
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gregl |
3.1 |
dev_view(nv) : set display view parameters
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VIEW *nv; : the new view
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Updates the display for the given view change.
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Look for nv==&odev.v when making view current after dev_input()
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gregl |
3.7 |
returns DEV_NEWVIEW flag. Return 1 on success, or 0 if the
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new view would conflict with device requirements. In the latter
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case, reset parameters in nv to make it more agreeable, calling
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error(COMMAND, "appropriate user warning").
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gregl |
3.1 |
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void
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gregl |
3.12 |
dev_clear() : clear device memory
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Clear the device memory in preparation for fresh data. Clearing
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the screen is optional.
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void
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gregl |
3.5 |
dev_value(c, p, v) : register new point of light
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gregl |
3.1 |
COLR c; : pixel color (RGBE)
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FVECT p; : world intersection point
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gregl |
3.5 |
FVECT v; : ray direction vector
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gregl |
3.1 |
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gregl |
3.11 |
Add the given color point to the display output queue. If imm_mode is
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non-zero, then values are being sent in rapid succession.
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gregl |
3.1 |
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int
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dev_flush() : flush the output and prepare for select call
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Updates display, taking any pending action required before select(2) call.
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Returns non-zero if there is device input available.
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int
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dev_input() : process pending display input
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Called when odev struct file descriptor shows input is ready.
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Returns flags indicating actions to take in the control process.
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gregl |
3.8 |
If the DC_VIEW or DC_RESIZE flag is returned, the odev
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gregl |
3.1 |
structure must be updated beforehand.
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void
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dev_close() : close the display
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Close the display device and free up resources in preparation for exit.
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Set odev.v.type=0 and odev.hres=odev.vres=0 when done.
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************************************************************************/
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