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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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gwlarson |
3.13 |
VIEW v; /* base view parameters */ |
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int hres, vres; /* base view resolution */ |
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gregl |
3.1 |
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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gwlarson |
3.13 |
#define DC_SETVIEW 0 /* set the base view */ |
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#define DC_GETVIEW 1 /* print the current base view */ |
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gregl |
3.8 |
#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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gwlarson |
3.13 |
The base view type, horizontal and vertical view angles and other |
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default parameters in odev.v should also be assigned. |
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gregl |
3.1 |
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gregl |
3.7 |
int |
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gwlarson |
3.13 |
dev_view(nv) : set base view parameters |
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gregl |
3.1 |
VIEW *nv; : the new view |
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gwlarson |
3.13 |
Updates the display for the given base view change. |
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gregl |
3.1 |
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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gwlarson |
3.13 |
VIEW * |
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dev_auxview(n, hv) : return nth auxiliary view |
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int n; : auxiliary view number |
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int hv[2]; : returned horiz. and vert. image resolution |
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Return the nth auxiliary view associated with the current base view. |
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The hv entries are assigned the horizontal and vertical view resolution, |
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respectively. Function returns NULL if there are no more auxiliary |
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views. The zeroeth auxiliary view is the base view itself. |
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gregl |
3.1 |
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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gwlarson |
3.13 |
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extern VIEW *dev_auxview(); |
