$OpenBSD: patch-cups_gdevcups_c,v 1.2 2009/04/27 08:26:23 bernd Exp $
--- cups/gdevcups.c.orig	Mon May 14 20:22:09 2007
+++ cups/gdevcups.c	Thu Oct 30 15:47:00 2008
@@ -69,6 +69,7 @@
 #include "gsexit.h"
 #include "arch.h"
 
+#include <dlfcn.h>
 #include <stdlib.h>
 #include <ctype.h>
 #include <cups/raster.h>
@@ -87,7 +88,7 @@
 
 #ifdef CUPS_RASTER_SYNCv1
 #  define cups_page_header_t cups_page_header2_t
-#  define cupsRasterWriteHeader cupsRasterWriteHeader2
+#  define cupsRasterWriteHeader cups->cupsRasterWriteHeader2
 #else
 /* The RGBW colorspace is not defined until CUPS 1.2... */
 #  define CUPS_CSPACE_RGBW 17
@@ -204,6 +205,14 @@ typedef struct gx_device_cups_s
   cups_raster_t		*stream;	/* Raster stream */
   cups_page_header_t	header;		/* PostScript page device info */
   int			landscape;	/* Non-zero if this is landscape */
+
+  /* cups stubs, initialized in cups_open() */
+  int libCupsReady;
+  void (*cupsRasterClose) (cups_raster_t *);
+  cups_raster_t *(*cupsRasterOpen) (int, cups_mode_t);
+  unsigned (*cupsRasterWriteHeader2) (cups_raster_t *, cups_page_header2_t *);
+  unsigned (*cupsRasterWritePixels) (cups_raster_t *, unsigned char *, unsigned);
+  ppd_file_t *(*ppdOpenFile) (const char *);
 } gx_device_cups;
 
 private gx_device_procs	cups_procs =
@@ -352,7 +361,14 @@ gx_device_cups	gs_cups_device =
     0,					/* cupsRowCount */
     0,					/* cupsRowFeed */
     0					/* cupsRowStep */
-  }
+  },
+  0,					/* landscape */
+  0,					/* libCupsReady */
+  NULL,					/* cupsRasterClose */
+  NULL,					/* cupsRasterOpen */
+  NULL,					/* cupsRasterWriteHeader2 */
+  NULL,					/* cupsRasterWritePixels */
+  NULL					/* ppdOpenFile */
 };
 
 /*
@@ -426,7 +442,7 @@ cups_close(gx_device *pdev)		/* I - Device info */
 
   if (cups->stream != NULL)
   {
-    cupsRasterClose(cups->stream);
+    cups->cupsRasterClose(cups->stream);
     cups->stream = NULL;
   }
 
@@ -2496,6 +2512,35 @@ cups_open(gx_device *pdev)		/* I - Device info */
 
   dprintf1("DEBUG2: cups_open(%p)\n", pdev);
 
+  if (!cups->libCupsReady) {
+    void *handle;
+    if (!(handle = dlopen("libcupsimage.so.3", 0))) {
+      eprintf1("ERROR: libcupsimage.so.3: %s\n", dlerror());
+      return -1;
+    }
+    if (!(cups->cupsRasterClose = dlsym(handle, "cupsRasterClose"))) {
+      eprintf1("ERROR: cupsRasterClose: %s\n", dlerror());
+      return -1;
+    }
+    if (!(cups->cupsRasterOpen = dlsym(handle, "cupsRasterOpen"))) {
+      eprintf1("ERROR: cupsRasterOpen: %s\n", dlerror());
+      return -1;
+    }
+    if (!(cups->cupsRasterWriteHeader2 = dlsym(handle, "cupsRasterWriteHeader2"))) {
+      eprintf1("ERROR: cupsRasterWriteHeader2: %s\n", dlerror());
+      return -1;
+    }
+    if (!(cups->cupsRasterWritePixels = dlsym(handle, "cupsRasterWritePixels"))) {
+      eprintf1("ERROR: cupsRasterWritePixels: %s\n", dlerror());
+      return -1;
+    }
+    if (!(cups->ppdOpenFile = dlsym(handle, "ppdOpenFile"))) {
+      eprintf1("ERROR: ppdOpenFile: %s\n", dlerror());
+      return -1;
+    }
+    cups->libCupsReady = 1;
+  }
+
   cups->printer_procs.get_space_params = cups_get_space_params;
 
   if (cups->page == 0)
@@ -2510,7 +2555,7 @@ cups_open(gx_device *pdev)		/* I - Device info */
     return (code);
 
   if (cupsPPD == NULL)
-    cupsPPD = ppdOpenFile(getenv("PPD"));
+    cupsPPD = cups->ppdOpenFile(getenv("PPD"));
 
   return (0);
 }
@@ -2597,7 +2642,7 @@ cups_print_pages(gx_device_printer *pdev,
 
   if (cups->stream == NULL)
   {
-    if ((cups->stream = cupsRasterOpen(fileno(cups->file),
+    if ((cups->stream = cups->cupsRasterOpen(fileno(cups->file),
                                        CUPS_RASTER_WRITE)) == NULL)
     {
       perror("ERROR: Unable to open raster stream - ");
@@ -3669,7 +3714,7 @@ cups_print_chunked(gx_device_printer *pdev,
       * Write the bitmap data to the raster stream...
       */
 
-      cupsRasterWritePixels(cups->stream, dst, cups->header.cupsBytesPerLine);
+      cups->cupsRasterWritePixels(cups->stream, dst, cups->header.cupsBytesPerLine);
     }
     else
     {
@@ -3677,7 +3722,7 @@ cups_print_chunked(gx_device_printer *pdev,
       * Write the scanline data to the raster stream...
       */
 
-      cupsRasterWritePixels(cups->stream, srcptr, cups->header.cupsBytesPerLine);
+      cups->cupsRasterWritePixels(cups->stream, srcptr, cups->header.cupsBytesPerLine);
     }
   }
 }
@@ -4345,7 +4390,7 @@ cups_print_banded(gx_device_printer *pdev,
     * Write the bitmap data to the raster stream...
     */
 
-    cupsRasterWritePixels(cups->stream, dst, cups->header.cupsBytesPerLine);
+    cups->cupsRasterWritePixels(cups->stream, dst, cups->header.cupsBytesPerLine);
   }
 }
 
@@ -4716,7 +4761,7 @@ cups_print_planar(gx_device_printer *pdev,
       * Write the bitmap data to the raster stream...
       */
 
-      cupsRasterWritePixels(cups->stream, dst, cups->header.cupsBytesPerLine);
+      cups->cupsRasterWritePixels(cups->stream, dst, cups->header.cupsBytesPerLine);
     }
 }