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* 10/5/88 |
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*/ |
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< |
#include <stdio.h> |
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#include "standard.h" |
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#include <signal.h> |
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#include "color.h" |
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#include "driver.h" |
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#include "vfork.h" |
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|
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#ifndef DEVPATH |
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#define DEVPATH getenv("PATH") /* device search path */ |
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#endif |
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|
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#ifndef BSD |
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#define vfork fork |
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#ifndef DELAY |
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#define DELAY 20 /* seconds to wait for response */ |
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#endif |
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|
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#ifndef WFLUSH |
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#define WFLUSH 30 /* flush after this many rays */ |
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#endif |
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static int comm_close(), comm_clear(), comm_paintr(), comm_errout(), |
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comm_getcur(), comm_comout(), comm_comin(), comm_flush(); |
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extern char *getpath(), *getenv(); |
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int onsigio(); |
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int comm_close(), comm_clear(), comm_paintr(), comm_errout(), |
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comm_getcur(), comm_comout(), comm_comin(); |
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struct driver comm_driver, comm_default = { |
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struct driver comm_driver = { |
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comm_close, comm_clear, comm_paintr, comm_getcur, |
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comm_comout, comm_comin |
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> |
comm_comout, comm_comin, comm_flush |
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}; |
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FILE *devin, *devout; |
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int p1[2], p2[2]; |
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char pin[16], pout[16]; |
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/* find driver program */ |
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if ((devname = getpath(dname, DEVPATH, 1)) == NULL) { |
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> |
if ((devname = getpath(dname, DEVPATH, X_OK)) == NULL) { |
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stderr_v(dname); |
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stderr_v(": not found\n"); |
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return(NULL); |
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goto syserr; |
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if ((devin = fdopen(p2[0], "r")) == NULL) |
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goto syserr; |
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bcopy(&comm_default, &comm_driver, sizeof(comm_driver)); |
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/* verify & get resolution */ |
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/* verify initialization */ |
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putw(COM_SENDM, devout); |
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fflush(devout); |
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if (getw(devin) != COM_RECVM) |
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return(NULL); |
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< |
comm_driver.xsiz = getw(devin); |
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comm_driver.ysiz = getw(devin); |
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fread(comm_driver.pixaspect, sizeof(comm_driver.pixaspect), 1, devin); |
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/* input handling */ |
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signal(SIGIO, onsigio); |
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> |
/* get driver parameters */ |
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> |
getstate(); |
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/* set error vectors */ |
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cmdvec = comm_comout; |
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if (wrnvec != NULL) |
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cmdvec = NULL; /* reset error vectors */ |
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if (wrnvec != NULL) |
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wrnvec = stderr_v; |
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signal(SIGIO, SIG_DFL); |
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fclose(devout); |
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fclose(devin); |
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while ((pid = wait(0)) != -1 && pid != devchild) |
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COLOR col; |
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int xmin, ymin, xmax, ymax; |
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{ |
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extern long nrays; /* number of rays traced */ |
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static long lastflush = 0; /* ray count at last flush */ |
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putc(COM_PAINTR, devout); |
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< |
fwrite(col, sizeof(COLOR), 1, devout); |
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> |
fwrite((char *)col, sizeof(COLOR), 1, devout); |
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putw(xmin, devout); |
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putw(ymin, devout); |
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putw(xmax, devout); |
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putw(ymax, devout); |
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– |
if (nrays - lastflush >= WFLUSH) { |
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– |
fflush(devout); |
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– |
lastflush = nrays; |
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– |
} |
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} |
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static |
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comm_flush() /* flush output to driver */ |
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{ |
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putc(COM_FLUSH, devout); |
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fflush(devout); |
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if (getc(devin) != COM_FLUSH) |
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reply_error("flush"); |
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getstate(); |
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} |
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|
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static int |
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comm_getcur(xp, yp) /* get and return cursor position */ |
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int *xp, *yp; |
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{ |
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putc(COM_COMOUT, devout); |
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myputs(str, devout); |
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< |
fflush(devout); |
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> |
if (str[strlen(str)-1] == '\n') |
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> |
fflush(devout); |
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} |
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static |
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< |
comm_comin(buf) /* read string from command line */ |
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> |
comm_comin(buf, prompt) /* read string from command line */ |
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char *buf; |
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+ |
char *prompt; |
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{ |
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putc(COM_COMIN, devout); |
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+ |
if (prompt == NULL) |
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putc(0, devout); |
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else { |
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+ |
putc(1, devout); |
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myputs(prompt, devout); |
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} |
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fflush(devout); |
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if (getc(devin) != COM_COMIN) |
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reply_error("comin"); |
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mygets(buf, devin); |
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< |
if (comm_driver.inpready > 0) |
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< |
comm_driver.inpready--; |
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> |
getstate(); |
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} |
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static |
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< |
onsigio() /* input ready */ |
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> |
getstate() /* get driver state variables */ |
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{ |
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< |
comm_driver.inpready++; |
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> |
fread((char *)&comm_driver.pixaspect, |
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> |
sizeof(comm_driver.pixaspect), 1, devin); |
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> |
comm_driver.xsiz = getw(devin); |
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> |
comm_driver.ysiz = getw(devin); |
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> |
comm_driver.inpready = getw(devin); |
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} |
