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+/*========================================================================*\
+
+Copyright (c) 1994-1999 Paul Vojta
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+PAUL VOJTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+NOTES:
+ This code was originally written by Ricardo Telichevesky
+ (ricardo@rle-vlsi-mit.edu) and Luis Miguel Silveira
+ (lms@rle-vlsi-mit.edu).
+ It was largely influenced by similar code in the SeeTeX/XTeX
+ package by Dirk Grunwald (grunwald@colorado.edu).
+
+\*========================================================================*/
+
+#ifdef PS_DPS /* whole file */
+
+#include "xdvi-config.h"
+#include <signal.h>
+#include <X11/X.h>
+#include <X11/Xlib.h>
+#include <DPS/XDPSlib.h>
+#include <DPS/dpsXclient.h>
+#include <DPS/dpsexcept.h>
+#include <DPS/dpsclient.h>
+
+ /*
+ * This string reads chunks (delimited by %%xdvimark).
+ * The first character of a chunk tells whether a given chunk
+ * is to be done within save/restore or not.
+ * The `H' at the end tells it that the first group is a
+ * header; i.e., no save/restore.
+ */
+#ifndef SUNHACK
+static char preamble[] = "\
+/xdvi$line 81 string def \
+/xdvi$run {{$error null ne {$error /newerror false put}if \
+ currentfile cvx stopped \
+ $error null eq {false} {$error /newerror get} ifelse and \
+ {handleerror} if} stopped pop} def \
+/xdvi$dslen countdictstack def \
+{currentfile read not {exit} if 72 eq \
+ {xdvi$run} \
+ {/xdvi$sav save def xdvi$run \
+ clear countdictstack xdvi$dslen sub {end} repeat xdvi$sav restore} \
+ ifelse \
+ {(%%xdvimark) currentfile xdvi$line {readline} stopped \
+ {clear} {pop eq {exit} if} ifelse }loop \
+ (xdvi$Ack\n) print flush \
+}loop\nH";
+#else /* SUNHACK */
+static char preamble[] = "\
+/xdvi$line 81 string def \
+/xdvi$run {{$error null ne {$error /newerror false put}if \
+ currentfile cvx stopped \
+ $error null eq {false} {$error /newerror get} ifelse and \
+ {handleerror} if} stopped pop} def \
+/xdvi$dslen countdictstack def \
+/xdvi$ack {{(%%xdvimark) currentfile xdvi$line {readline} stopped \
+ {clear} {pop eq {exit} if} ifelse }loop \
+ (xdvi$Ack\n) print flush} bind def \
+errordict begin /interrupt{(xdvi$Int\n) print flush stop}bind def \
+end \
+{{currentfile read not {exit} if 72 eq \
+ {xdvi$run} \
+ {/xdvi$sav save def xdvi$run \
+ clear countdictstack xdvi$dslen sub {end} repeat xdvi$sav restore} \
+ ifelse \
+ xdvi$ack \
+ }loop \
+xdvi$ack \
+}loop\nH";
+#endif /* SUNHACK */
+
+extern char psheader[];
+extern int psheaderlen;
+
+#define postscript resource._postscript
+
+
+/* global procedures (besides initDPS) */
+
+static void toggleDPS ARGS((void));
+static void destroyDPS ARGS((void));
+static void interruptDPS ARGS((void));
+static void endpageDPS ARGS((void));
+static void drawbeginDPS ARGS((int, int, _Xconst char *));
+static void drawrawDPS ARGS((_Xconst char *));
+static void drawfileDPS ARGS((_Xconst char *, FILE *));
+static void drawendDPS ARGS((_Xconst char *));
+static void beginheaderDPS ARGS((void));
+static void endheaderDPS ARGS((void));
+static void newdocDPS ARGS((void));
+
+static struct psprocs dps_procs = {
+ /* toggle */ toggleDPS,
+ /* destroy */ destroyDPS,
+ /* interrupt */ interruptDPS,
+ /* endpage */ endpageDPS,
+ /* drawbegin */ drawbeginDPS,
+ /* drawraw */ drawrawDPS,
+ /* drawfile */ drawfileDPS,
+ /* drawend */ drawendDPS,
+ /* beginheader */ beginheaderDPS,
+ /* endheader */ endheaderDPS,
+ /* newdoc */ newdocDPS};
+
+static DPSContext DPS_ctx = NULL;
+static DPSSpace DPS_space = NULL;
+static int DPS_mag; /* magnification currently in use */
+static int DPS_shrink; /* shrink factor currently in use */
+static Boolean DPS_active; /* if we've started a page */
+static int DPS_pending; /* number of ack's we're expecting */
+static Boolean DPS_in_header; /* if we're sending a header */
+static Boolean DPS_in_doc; /* if we've sent header information */
+
+
+#if 0
+static void DPSErrorProcHandler();
+#else
+#define DPSErrorProcHandler DPSDefaultErrorProc
+#endif
+
+
+static char ackstr[] = "xdvi$Ack\n";
+#ifdef SUNHACK
+static char intstr[] = "xdvi$Int\n";
+#endif
+
+#define LINELEN 81
+#define BUFLEN (LINELEN + sizeof(ackstr))
+static char line[BUFLEN + 1];
+static char *linepos = line;
+
+static void
+TextProc(ctxt, buf, count)
+ DPSContext ctxt;
+ char *buf;
+ unsigned long count;
+{
+ int i;
+ char *p;
+ char *p0;
+
+ while (count > 0) {
+ i = line + BUFLEN - linepos;
+ if (i > count) i = count;
+ (void) bcopy(buf, linepos, i);
+ linepos += i;
+ buf += i;
+ count -= i;
+ p0 = line;
+ for (;;) {
+ if (p0 >= linepos) {
+ linepos = line;
+ break;
+ }
+ p = memchr(p0, '\n', linepos - p0);
+ if (p == NULL) {
+ if (p0 != line) {
+ (void) bcopy(p0, line, linepos - p0);
+ linepos -= p0 - line;
+ }
+ else if (linepos == line + BUFLEN) {
+ char c;
+
+ c = line[LINELEN];
+ line[LINELEN] = '\0';
+ Printf("DPS: %s\n", line);
+ line[LINELEN] = c;
+ linepos -= LINELEN;
+ (void) bcopy(line + LINELEN, line, linepos - line);
+ }
+ break;
+ }
+ if (p >= p0 + 8 && memcmp(p - 8, ackstr, 9) == 0) {
+ --DPS_pending;
+ if (debug & DBG_PS)
+ Printf("Got DPS ack; %d pending.\n", DPS_pending);
+ ++p;
+ (void) bcopy(p, p - 9, linepos - p);
+ linepos -= 9;
+ continue;
+ }
+#ifdef SUNHACK
+ if (p >= p0 + 8 && memcmp(p - 8, intstr, 9) == 0) {
+ DPS_pending = 1;
+ if (debug & DBG_PS)
+ Puts("Got DPS int.");
+ ++p;
+ (void) bcopy(p, p - 9, linepos - p);
+ linepos -= 9;
+ continue;
+ }
+#endif /* SUNHACK */
+ *p = '\0';
+ Printf("DPS: %s\n", p0);
+ p0 = p + 1;
+ }
+ }
+}
+
+
+/*---------------------------------------------------------------------------*
+ waitack()
+
+ Arguments: none.
+
+ Returns: (void)
+
+ Description:
+ Waits until the requisite number of acknowledgements has been received from
+ the context.
+
++----------------------------------------------------------------------------*/
+
+static void
+waitack()
+{
+ while (DPS_pending > 0) {
+ (void) XEventsQueued(DISP, QueuedAfterFlush);
+ ps_read_events(False, False);
+ if (DPS_ctx == NULL) break; /* if interrupt occurred */
+ }
+}
+
+
+/*---------------------------------------------------------------------------*
+ initDPS()
+
+ Arguments: (none)
+ Returns: (void)
+ Side-Effects: DPS_ctx may be set as well as other static variables.
+
+ Description:
+ Initializes variables from the application main loop. Checks to see if
+ a connection to the DPS server can be opened.
+
++----------------------------------------------------------------------------*/
+
+static int
+get_shift(mask)
+ Pixel mask;
+{
+ int k;
+
+ for (k = 0; (mask & 1) == 0; ++k)
+ mask >>= 1;
+ return k;
+}
+
+Boolean
+initDPS()
+{
+
+ /* Try to create a context */
+
+#if GREY
+
+ if (our_colormap == DefaultColormapOfScreen(SCRN))
+ DPS_ctx = XDPSCreateSimpleContext(DISP, mane.win, ruleGC, 0, 0,
+ TextProc, DPSDefaultErrorProc, NULL);
+ else {
+ static XStandardColormap *ccube = NULL;
+ static XStandardColormap *grayramp = NULL;
+ int shift;
+
+ if (grayramp == NULL) {
+ grayramp = XAllocStandardColormap();
+ if (grayramp == NULL)
+ return False;
+ }
+
+ if (ccube == NULL) {
+ ccube = XAllocStandardColormap();
+ if (ccube == NULL)
+ return False;
+ }
+
+ shift = get_shift(our_visual->red_mask);
+ ccube->red_max = our_visual->red_mask >> shift;
+ ccube->red_mult = 1 << shift;
+
+ shift = get_shift(our_visual->green_mask);
+ ccube->green_max = our_visual->green_mask >> shift;
+ ccube->green_mult = 1 << shift;
+
+ shift = get_shift(our_visual->blue_mask);
+ ccube->blue_max = our_visual->blue_mask >> shift;
+ ccube->blue_mult = 1 << shift;
+
+ grayramp->red_max = ccube->red_max & ccube->green_max
+ & ccube->blue_max;
+ grayramp->red_mult = ccube->red_mult + ccube->green_mult
+ + ccube->blue_mult;
+
+ ccube->colormap = grayramp->colormap = our_colormap;
+ ccube->visualid = grayramp->visualid = our_visual->visualid;
+
+ DPS_ctx = XDPSCreateContext(DISP, mane.win, ruleGC, 0, 0,
+ 0, grayramp, ccube,
+ /* actual */ (ccube->red_max + 1) * (ccube->green_max + 1)
+ * (ccube->blue_max + 1),
+ TextProc, DPSDefaultErrorProc, NULL);
+ }
+
+#else /* not GREY */
+
+ DPS_ctx = XDPSCreateSimpleContext(DISP, mane.win, ruleGC, 0, 0,
+ TextProc, DPSDefaultErrorProc, NULL);
+
+#endif /* not GREY */
+
+ if (DPS_ctx == NULL)
+ return False;
+
+ DPS_mag = DPS_shrink = -1;
+ DPS_active = False;
+ DPS_pending = 1;
+
+ DPS_space = DPSSpaceFromContext(DPS_ctx);
+ DPSWritePostScript(DPS_ctx, preamble, sizeof(preamble) - 1);
+ DPSWritePostScript(DPS_ctx, psheader, psheaderlen);
+ DPSPrintf(DPS_ctx, "matrix setmatrix stop\n%%%%xdvimark\n");
+ DPSFlushContext(DPS_ctx);
+
+ psp = dps_procs;
+ return True;
+}
+
+
+/*---------------------------------------------------------------------------*
+ toggleDPS()
+
+ Arguments: none
+ Returns: (void)
+ Side-Effects: psp.drawbegin is changed.
+
+ Description:
+ Used to toggle the rendering of PostScript by the DPS server
+
++----------------------------------------------------------------------------*/
+
+static void
+toggleDPS()
+{
+ if (debug & DBG_PS) Puts("Toggling DPS on or off");
+ if (postscript) psp.drawbegin = drawbeginDPS;
+ else {
+ interruptDPS();
+ psp.drawbegin = drawbegin_none;
+ }
+}
+
+
+/*---------------------------------------------------------------------------*
+ destroyDPS()
+
+ Arguments: none
+ Returns: (void)
+ Side-Effects: the context is nulled out and destroyed.
+
+ Description:
+ Close the connection to the DPS server; used when rendering is terminated
+ in any way.
+
++----------------------------------------------------------------------------*/
+
+static void
+destroyDPS()
+{
+ if (debug & DBG_PS)
+ Puts("Calling destroyDPS()");
+ if (linepos > line) {
+ *linepos = '\0';
+ Printf("DPS: %s\n", line);
+ }
+ DPSDestroySpace(DPS_space);
+ psp = no_ps_procs;
+ scanned_page = scanned_page_bak = scanned_page_reset;
+}
+
+
+/*---------------------------------------------------------------------------*
+ interruptDPS()
+
+ Arguments: none
+ Returns: (void)
+ Side-Effects: the context may be nulled out and destroyed.
+
+ Description:
+ Close the connection to the DPS server; used when rendering is terminated
+ because of an interruption in the viewing of the current page.
+
++----------------------------------------------------------------------------*/
+
+static void
+interruptDPS()
+{
+#ifdef SUNHACK
+ static Boolean interrupting = False;
+#endif
+
+ if (debug & DBG_PS)
+ Puts("Running interruptDPS()");
+
+#ifndef SUNHACK
+ if (DPS_pending > 0)
+#else /* SUNHACK */
+ if (DPS_pending > 0 && !interrupting)
+#endif /* SUNHACK */
+ {
+ if (debug & DBG_PS)
+ Printf("interruptDPS: code is now %d\n", XDPSGetContextStatus(DPS_ctx));
+
+ /*
+ * I would really like to use DPSInterruptContext() here, but (at least
+ * on an RS6000) I can't get it to work.
+ */
+
+#ifdef SUNHACK
+ /*
+ * On the other hand, under OpenWindows 3.3 (at least), destroying and
+ * re-creating contexts has a nasty habit of crashing the server.
+ */
+
+ interrupting = True;
+ DPSInterruptContext(DPS_ctx);
+ DPS_pending = 32767;
+ DPSPrintf(DPS_ctx, "%%%%xdvimark\n");
+ DPSFlushContext(DPS_ctx);
+ DPS_active = False;
+ waitack();
+ interrupting = False;
+#else /* SUNHACK */
+ DPSDestroyContext(DPS_ctx);
+ DPS_ctx = NULL;
+ DPS_active = False;
+ DPS_pending = 0;
+#endif /* SUNHACK */
+ }
+}
+
+
+/*---------------------------------------------------------------------------*
+ endpageDPS()
+
+ Arguments: none
+ Returns: (void)
+ Side-Effects: the DPS_active variable is cleared.
+
+ Description:
+ Should be called at the end of a page to end this chunk for the DPS server.
+
++----------------------------------------------------------------------------*/
+
+static void
+endpageDPS()
+{
+ if (DPS_active) {
+ if (debug & DBG_PS)
+ Puts("Endpage sent to context");
+ DPSPrintf(DPS_ctx, "stop\n%%%%xdvimark\n");
+ DPSFlushContext(DPS_ctx);
+ DPS_active = False;
+ waitack();
+ }
+}
+
+
+/*---------------------------------------------------------------------------*
+ drawbeginDPS ()
+
+ Arguments: xul, yul - coordinates of the upper left corner of the figure
+ cp - string with the bounding box line data
+ Returns: (void)
+ Side-Effects: DPS_ctx is set is set and connection to DPS server is
+ opened.
+
+ Description:
+ Opens a connection to the DPS server and send in the preamble and the
+ bounding box information after correctly computing resolution factors.
+ In case no rendering is to be done, outlines the figure.
+ An outline is also generated whenever the a context cannot be allocated
+
++----------------------------------------------------------------------------*/
+
+static void
+drawbeginDPS(xul, yul, cp)
+ int xul, yul;
+ _Xconst char *cp;
+{
+ /* static char faulty_display_vs[]
+ * ="DECWINDOWS DigitalEquipmentCorporation UWS4.2LA"; */
+
+ if (debug & DBG_PS)
+ Printf("Begin drawing at xul= %d, yul= %d.\n", xul, yul);
+
+ /* we assume that I cannot write the file to the postscript context */
+ if (DPS_ctx == NULL) {
+ DPS_ctx = XDPSCreateSimpleContext(DISP, mane.win, ruleGC, 0, 0,
+ TextProc, DPSErrorProcHandler, DPS_space);
+ if (DPS_ctx == NULL) {
+ psp = no_ps_procs;
+ draw_bbox();
+ return;
+ }
+ DPSWritePostScript(DPS_ctx, preamble, sizeof(preamble) - 1);
+ /* it already has psheader */
+ DPSPrintf(DPS_ctx, "matrix setmatrix stop\n%%%%xdvimark\n");
+ DPS_mag = DPS_shrink = -1;
+ DPS_active = False;
+ DPS_pending = 1;
+ }
+
+ if (!DPS_active) {
+ /* send initialization to context */
+ if (magnification != DPS_mag) {
+ DPSPrintf(DPS_ctx, "H TeXDict begin /DVImag %d 1000 div def \
+end stop\n%%%%xdvimark\n",
+ DPS_mag = magnification);
+ ++DPS_pending;
+ }
+ if (mane.shrinkfactor != DPS_shrink) {
+ DPSPrintf(DPS_ctx, "H TeXDict begin %d %d div dup \
+/Resolution X /VResolution X \
+end stop\n%%%%xdvimark\n",
+ pixels_per_inch, DPS_shrink = mane.shrinkfactor);
+ ++DPS_pending;
+ }
+ DPSPrintf(DPS_ctx, " TeXDict begin\n");
+ DPS_active = True;
+ ++DPS_pending;
+ }
+
+ DPSPrintf(DPS_ctx, "%d %d moveto\n", xul, yul);
+ DPSPrintf(DPS_ctx, "%s\n", cp);
+}
+
+
+/*---------------------------------------------------------------------------*
+
+ drawrawDPS()
+
+ Arguments: cp - the raw string to be sent to the postscript interpreter
+ Returns: (void)
+ Side-Effects: (none)
+
+ Description:
+ If there is a valid postscript context, just send the string to the
+ interpreter, else leave.
+
++----------------------------------------------------------------------------*/
+
+static void
+drawrawDPS(cp)
+ _Xconst char *cp;
+{
+ if (!DPS_active)
+ return;
+
+ if (debug & DBG_PS)
+ Printf("Sending raw PS to context: %s\n", cp);
+
+ read_events(False);
+ DPSPrintf(DPS_ctx,"%s\n", cp);
+}
+
+
+/*---------------------------------------------------------------------------*
+ drawfileDPS()
+
+ Arguments: cp - string with the postscript file pathname
+ psfile - opened file pointer
+ Returns: (void)
+ Side-Effects: none
+
+ Description:
+ Postscript file containing the figure is opened and sent to the DPS server.
+
++----------------------------------------------------------------------------*/
+
+static void
+drawfileDPS(cp, psfile)
+ _Xconst char *cp;
+ FILE *psfile;
+{
+ char buffer[1025];
+ int blen;
+
+ if (!DPS_active) {
+ Fclose(psfile);
+ ++n_files_left;
+ return;
+ }
+
+ if (debug & DBG_PS)
+ Printf("sending file %s\n", cp);
+ for (;;) {
+ ps_read_events(False, False);
+ if (canit || !DPS_active) break; /* alt_canit is not a factor here */
+ blen = fread(buffer, sizeof(char), 1024, psfile);
+ if (blen == 0) break;
+ DPSWritePostScript(DPS_ctx, buffer, blen);
+ }
+ Fclose(psfile);
+ ++n_files_left;
+ if (canit) {
+ interruptDPS();
+ longjmp(canit_env, 1);
+ }
+}
+
+
+/*---------------------------------------------------------------------------*
+ drawendDPS()
+
+ Arguments: cp - string with indication of the end of the special
+ Returns: (void)
+ Side-Effects: none
+
+ Description:
+ Sends the indication of end of the figure PostScript code.
+
++----------------------------------------------------------------------------*/
+
+static void
+drawendDPS(cp)
+ _Xconst char *cp;
+{
+ if (!DPS_active)
+ return;
+
+ if (debug & DBG_PS)
+ Printf("End PS: %s\n", cp);
+ read_events(False);
+ DPSPrintf(DPS_ctx,"%s\n", cp);
+}
+
+
+/*---------------------------------------------------------------------------*
+ beginheaderDPS()
+
+ Arguments: none
+ Returns: (void)
+
+ Description:
+ Prepares the PostScript interpreter for receipt of header code.
+
++----------------------------------------------------------------------------*/
+
+static void
+beginheaderDPS()
+{
+ if (debug & DBG_PS) Puts("Running beginheaderDPS()");
+
+ if (DPS_active) {
+ if (!DPS_in_header)
+ oops("Internal error in beginheaderDPS().\n");
+ return;
+ }
+
+ DPS_in_header = True;
+ if (DPS_in_doc)
+ DPSPrintf(DPS_ctx, "H");
+ else {
+ DPSPrintf(DPS_ctx, "Hsave /xdvi$doc exch def\n");
+ DPS_in_doc = True;
+ }
+ DPS_active = True;
+ ++DPS_pending;
+}
+
+
+/*---------------------------------------------------------------------------*
+ endheaderDPS()
+
+ Arguments: none
+ Returns: (void)
+
+ Description:
+ Prepares the PostScript interpreter for receipt of header code.
+
++----------------------------------------------------------------------------*/
+
+static void
+endheaderDPS()
+{
+ if (debug & DBG_PS) Puts("Running endheaderDPS()");
+
+ if (DPS_active) {
+ DPSPrintf(DPS_ctx, "stop\n%%%%xdvimark\n");
+ DPS_active = False;
+ DPS_in_header = False;
+ DPSFlushContext(DPS_ctx);
+ waitack();
+ }
+}
+
+
+/*---------------------------------------------------------------------------*
+ newdocDPS()
+
+ Arguments: none
+ Returns: (void)
+
+ Description:
+ Clears out headers stored from the previous document.
+
++----------------------------------------------------------------------------*/
+
+static void
+newdocDPS()
+{
+ if (debug & DBG_PS) Puts("Running newdocDPS()");
+
+ if (DPS_in_doc) {
+ DPSPrintf(DPS_ctx, "H xdvi$doc restore stop\n%%%%xdvimark\n");
+ ++DPS_pending;
+ DPS_mag = DPS_shrink = -1;
+ DPS_in_doc = False;
+ }
+}
+
+#endif /* PS_DPS */