Introduce print-as-raster as printer/job attribute

Some printers do not take kindly newer PDF versions which results in
omitting font characters in the printout. Such jobs print fine as a
raster, however retrying as raster depends on benevolence of the printer
firmware what it counts as an unrecoverable printing error.

In the past, we preferred raster over PDF in cups-filters, causing other
issues like with finishings, or solutions like generating PCLm PPD were
mentioned, however it would require a way how to define for which models
it should be used, and take of such database.

Thus introducing `print-as-raster` job attribute, which makes the job
to be printed as raster, and `print-as-raster-default` printer attributes,
which makes any job coming into the printer object to be printed as raster.

Internally it uses similar mechanism as raster retry, which was adjusted
to match both use cases now.

Author: zdohnal

cups/encode.c

@@ -298,6 +298,8 @@ static const _ipp_option_t ipp_options[] =
   { 0, "ppi-default",		IPP_TAG_INTEGER,	IPP_TAG_PRINTER },
   { 0, "prettyprint",		IPP_TAG_BOOLEAN,	IPP_TAG_JOB },
   { 0, "prettyprint-default",	IPP_TAG_BOOLEAN,	IPP_TAG_PRINTER },
+  { 0, "print-as-raster",	IPP_TAG_BOOLEAN,	IPP_TAG_JOB },
+  { 0, "print-as-raster-default", IPP_TAG_BOOLEAN,	IPP_TAG_PRINTER },
   { 0, "print-color-mode",	IPP_TAG_KEYWORD,	IPP_TAG_JOB,
 							IPP_TAG_DOCUMENT },
   { 0, "print-color-mode-default", IPP_TAG_KEYWORD,	IPP_TAG_PRINTER },

doc/help/man-lp.html

@@ -184,6 +184,9 @@ <h3 id="lp-1.options.common-job-options">Common Job Options</h3>
 </p>
     <p style="margin-left: 2.5em; text-indent: -2.5em;"><strong>-o orientation-requested=6</strong><br>
 Prints the job in reverse portrait (rotated 180 degrees).
+</p>
+    <p style="margin-left: 2.5em; text-indent: -2.5em;"><strong>-o print-as-raster</strong><br>
+Prints the job as raster.
 </p>
     <p style="margin-left: 2.5em; text-indent: -2.5em;"><strong>-o print-quality=3</strong><br>
 </p>

man/lp.1

@@ -180,6 +180,9 @@ Prints the job in landscape (rotated 90 degrees clockwise).
 \fB\-o orientation\-requested=6\fR
 Prints the job in reverse portrait (rotated 180 degrees).
 .TP 5
+\fB\-o print-as-raster\fR
+Prints the job as raster.
+.TP 5
 \fB\-o print\-quality=3\fR
 .TP 5
 \fB\-o print\-quality=4\fR

scheduler/ipp.c

@@ -1517,6 +1517,9 @@ add_job(cupsd_client_t  *con,		/* I - Client connection */
     return (NULL);
   }
 
+  if (ippGetBoolean(ippFindAttribute(con->request, "print-as-raster", IPP_TAG_BOOLEAN), 0))
+    job->print_as_raster = 1;
+
   job->dtype   = printer->type & (CUPS_PTYPE_CLASS | CUPS_PTYPE_REMOTE);
   job->attrs   = con->request;
   job->dirty   = 1;

scheduler/job.c

@@ -579,7 +579,7 @@ cupsdContinueJob(cupsd_job_t *job)	/* I - Job */
 
     cupsRWLockWrite(&MimeDatabase->lock);
 
-    if (job->retry_as_raster)
+    if (job->print_as_raster)
     {
      /*
       * Need to figure out whether the printer supports image/pwg-raster or
@@ -596,9 +596,9 @@ cupsdContinueJob(cupsd_job_t *job)	/* I - Job */
       }
 
       if (dst)
-        cupsdLogJob(job, CUPSD_LOG_DEBUG, "Retrying job as \"%s\".", strchr(dst->type, '/') + 1);
+	cupsdLogJob(job, CUPSD_LOG_DEBUG, "%s job as \"%s\".", job->print_as_raster > 0 ? "Printing" : "Retrying", strchr(dst->type, '/') + 1);
       else
-        cupsdLogJob(job, CUPSD_LOG_ERROR, "Unable to retry job using a supported raster format.");
+	cupsdLogJob(job, CUPSD_LOG_ERROR, "Unable to force job using a supported raster format.");
     }
 
     filters = mimeFilter2(MimeDatabase, job->filetypes[job->current_file], (size_t)fileinfo.st_size, dst, &(job->cost));
@@ -5247,7 +5247,7 @@ update_job(cupsd_job_t *job)		/* I - Job to check */
       cupsdLogJob(job, CUPSD_LOG_DEBUG, "JOBSTATE: %s", message);
 
       if (!strcmp(message, "cups-retry-as-raster"))
-        job->retry_as_raster = 1;
+        job->print_as_raster = -1;
       else
         ippSetString(job->attrs, &job->reasons, 0, message);
     }

scheduler/job.h

@@ -76,7 +76,8 @@ struct cupsd_job_s			/**** Job request ****/
   int			status;		/* Status code from filters */
   int			tries;		/* Number of tries for this job */
   int			completed;	/* cups-waiting-for-job-completed seen */
-  int			retry_as_raster;/* Need to retry the job as raster */
+  int			print_as_raster;
+					/* Need to print the job as raster */
   char			*auth_env[3],	/* AUTH_xxx environment variables,
                                          * if any */
 			*auth_uid;	/* AUTH_UID environment variable */