cfFilterGhostscript(): Never supply "-dDEVICEWIDTHPOINTS=0 -dDEVICEHE…

…IGHTPOINTS=0"

If no page size got requested with the job (page dimensions are zero
in raster header) skip these arguments so that Ghostscript uses the
page dimensions of the input page.

CHANGES.md

@@ -2,6 +2,11 @@
 
 ## CHANGES IN V2.0b2 (TBA)
 
+- cfFilterGhostscript(): Never supply "-dDEVICEWIDTHPOINTS=0
+  -dDEVICEHEIGHTPOINTS=0", if no page size got requested with the job
+  (page dimensions are zero in raster header) skip these arguments so
+  that Ghostscript uses the page dimensions of the input page.
+
 - libcupsfilters.pc.in: Added libqpdf under "Libs.private".
 
 - configure.ac: Added "foreign" to to AM_INIT_AUTOMAKE() call. Makes

cupsfilters/ghostscript.c

@@ -285,10 +285,13 @@ header_to_gs_args(gs_page_header *h,
     if (h->OutputFaceUp)
       cupsArrayAdd(gs_args, strdup("-dOutputFaceUp"));
   }
-  snprintf(tmpstr, sizeof(tmpstr), "-dDEVICEWIDTHPOINTS=%d", h->PageSize[0]);
-  cupsArrayAdd(gs_args, strdup(tmpstr));
-  snprintf(tmpstr, sizeof(tmpstr), "-dDEVICEHEIGHTPOINTS=%d", h->PageSize[1]);
-  cupsArrayAdd(gs_args, strdup(tmpstr));
+  if (h->PageSize[0] > 0 && h->PageSize[1] > 0)
+  {
+    snprintf(tmpstr, sizeof(tmpstr), "-dDEVICEWIDTHPOINTS=%d", h->PageSize[0]);
+    cupsArrayAdd(gs_args, strdup(tmpstr));
+    snprintf(tmpstr, sizeof(tmpstr), "-dDEVICEHEIGHTPOINTS=%d", h->PageSize[1]);
+    cupsArrayAdd(gs_args, strdup(tmpstr));
+  }
   if (outformat == CF_FILTER_OUT_FORMAT_CUPS_RASTER ||
       outformat == CF_FILTER_OUT_FORMAT_PWG_RASTER ||
       outformat == CF_FILTER_OUT_FORMAT_APPLE_RASTER)