# HG changeset patch
# User Rik <rik@octave.org>
# Date 1383084983 25200
# Node ID 06a850f83dd40cad50797186990f2670a642d12e
# Parent  6b51f5f44aea5e039864c034ccc34d771a6c061a
build: Remove embedded gl2ps.  Require gl2ps as external dependency.

* NEWS: Announce that gl2ps is no longer distributed with Octave.

* build-aux/common.mk: New AC_SUBST macro GL2PS_LIBS.

* configure.ac: When building native graphics, test for gl2ps.h header.
If not found, print a warning and disable printing of FLTK figures.

* libinterp/corefcn/gl2ps-renderer.cc, libinterp/corefcn/gl2ps-renderer.h:
Only compile files if HAVE_GL2PS_H is true.

* libinterp/dldfcn/__init_fltk__.cc(draw): Use #ifdef HAVE_GL2PS_H
to either print figure, or issue a warning when gl2ps is not available.

* libinterp/link-deps.mk: Add GL2PS_LIBS to libinter link dependencies

* libinterp/corefcn/module.mk: Remove gl2ps.h, gl2ps.c from build system.

* libinterp/corefcn/gl2ps.c, libinterp/corefcn/gl2ps.h: Removed from
distribution.

diff -r 6b51f5f44aea -r 06a850f83dd4 NEWS
--- a/NEWS	Tue Oct 29 16:29:46 2013 -0400
+++ b/NEWS	Tue Oct 29 15:16:23 2013 -0700
@@ -16,6 +16,12 @@
     Adding this command to your ~/.octaverc file will set the default
     for each session.
 
+ ** Printing or saving figures with OpenGL graphics requires the
+    gl2ps library which is no longer distributed with Octave.  The
+    software is widely available in most package managers.  If a
+    pre-compiled package does not exist for your system, you can find
+    the current sources at http://www.geuz.org/gl2ps/.
+
  ** Octave now supports nested functions with scoping rules that are
     compatible with Matlab.  A nested function is one declared and defined
     within the body of another function.  The nested function is only
diff -r 6b51f5f44aea -r 06a850f83dd4 build-aux/common.mk
--- a/build-aux/common.mk	Tue Oct 29 16:29:46 2013 -0400
+++ b/build-aux/common.mk	Tue Oct 29 15:16:23 2013 -0700
@@ -238,6 +238,8 @@
 GRAPHICS_CFLAGS = @GRAPHICS_CFLAGS@
 GRAPHICS_LIBS = @GRAPHICS_LIBS@
 
+GL2PS_LIBS = @GL2PS_LIBS@
+
 HDF5_CPPFLAGS = @HDF5_CPPFLAGS@
 HDF5_LDFLAGS = @HDF5_LDFLAGS@
 HDF5_LIBS = @HDF5_LIBS@
diff -r 6b51f5f44aea -r 06a850f83dd4 configure.ac
--- a/configure.ac	Tue Oct 29 16:29:46 2013 -0400
+++ b/configure.ac	Tue Oct 29 15:16:23 2013 -0700
@@ -1190,6 +1190,15 @@
 AC_SUBST(GRAPHICS_CFLAGS)
 AC_SUBST(GRAPHICS_LIBS)
 
+## Check for gl2ps which is required for printing with OpenGL graphics
+if test $native_graphics = yes; then
+  AC_CHECK_HEADERS([gl2ps.h],
+    [GL2PS_LIBS="-lgl2ps"],
+    [AC_MSG_WARN([gl2ps library not found.  OpenGL printing is disabled.])])
+fi
+
+AC_SUBST(GL2PS_LIBS)
+
 ### Start determination of shared vs. static libraries
 
 ## Use -static if compiling on Alpha OSF/1 1.3 systems.
diff -r 6b51f5f44aea -r 06a850f83dd4 libinterp/corefcn/gl2ps-renderer.cc
--- a/libinterp/corefcn/gl2ps-renderer.cc	Tue Oct 29 16:29:46 2013 -0400
+++ b/libinterp/corefcn/gl2ps-renderer.cc	Tue Oct 29 15:16:23 2013 -0700
@@ -24,7 +24,7 @@
 #include <config.h>
 #endif
 
-#if defined (HAVE_OPENGL)
+#ifdef HAVE_GL2PS_H
 
 #include <cstdio>
 
diff -r 6b51f5f44aea -r 06a850f83dd4 libinterp/corefcn/gl2ps-renderer.h
--- a/libinterp/corefcn/gl2ps-renderer.h	Tue Oct 29 16:29:46 2013 -0400
+++ b/libinterp/corefcn/gl2ps-renderer.h	Tue Oct 29 15:16:23 2013 -0700
@@ -23,8 +23,10 @@
 #if !defined (gl2ps_renderer_h)
 #define gl2ps_renderer_h 1
 
+#ifdef HAVE_GL2PS_H
+
 #include "gl-render.h"
-#include "gl2ps.h"
+#include <gl2ps.h>
 
 class
 OCTINTERP_API
@@ -82,4 +84,6 @@
   std::string fontname;
 };
 
+#endif  // HAVE_GL2PS_H
+
 #endif
diff -r 6b51f5f44aea -r 06a850f83dd4 libinterp/corefcn/gl2ps.c
--- a/libinterp/corefcn/gl2ps.c	Tue Oct 29 16:29:46 2013 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,6078 +0,0 @@
-/*
- * GL2PS, an OpenGL to PostScript Printing Library
- * Copyright (C) 1999-2011 C. Geuzaine
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of either:
- *
- * a) the GNU Library General Public License as published by the Free
- * Software Foundation, either version 2 of the License, or (at your
- * option) any later version; or
- *
- * b) the GL2PS License as published by Christophe Geuzaine, either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See either
- * the GNU Library General Public License or the GL2PS License for
- * more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library in the file named "COPYING.LGPL";
- * if not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- * Cambridge, MA 02139, USA.
- *
- * You should have received a copy of the GL2PS License with this
- * library in the file named "COPYING.GL2PS"; if not, I will be glad
- * to provide one.
- *
- * For the latest info about gl2ps and a full list of contributors,
- * see http://www.geuz.org/gl2ps/.
- *
- * Please report all bugs and problems to <gl2ps@geuz.org>.
- */
-
-#include "gl2ps.h"
-
-#include <math.h>
-#include <string.h>
-#include <sys/types.h>
-#include <stdarg.h>
-#include <time.h>
-#include <float.h>
-
-#if defined(GL2PS_HAVE_ZLIB)
-#include <zlib.h>
-#endif
-
-#if defined(GL2PS_HAVE_LIBPNG)
-#include <png.h>
-#endif
-
-/*********************************************************************
- *
- * Private definitions, data structures and prototypes
- *
- *********************************************************************/
-
-/* Magic numbers (assuming that the order of magnitude of window
-   coordinates is 10^3) */
-
-#define GL2PS_EPSILON       5.0e-3F
-#define GL2PS_ZSCALE        1000.0F
-#define GL2PS_ZOFFSET       5.0e-2F
-#define GL2PS_ZOFFSET_LARGE 20.0F
-#define GL2PS_ZERO(arg)     (fabs(arg) < 1.e-20)
-
-/* Primitive types */
-
-#define GL2PS_NO_TYPE          -1
-#define GL2PS_TEXT             1
-#define GL2PS_POINT            2
-#define GL2PS_LINE             3
-#define GL2PS_QUADRANGLE       4
-#define GL2PS_TRIANGLE         5
-#define GL2PS_PIXMAP           6
-#define GL2PS_IMAGEMAP         7
-#define GL2PS_IMAGEMAP_WRITTEN 8
-#define GL2PS_IMAGEMAP_VISIBLE 9
-#define GL2PS_SPECIAL          10
-
-/* BSP tree primitive comparison */
-
-#define GL2PS_COINCIDENT  1
-#define GL2PS_IN_FRONT_OF 2
-#define GL2PS_IN_BACK_OF  3
-#define GL2PS_SPANNING    4
-
-/* 2D BSP tree primitive comparison */
-
-#define GL2PS_POINT_COINCIDENT 0
-#define GL2PS_POINT_INFRONT    1
-#define GL2PS_POINT_BACK       2
-
-/* Internal feedback buffer pass-through tokens */
-
-#define GL2PS_BEGIN_OFFSET_TOKEN   1
-#define GL2PS_END_OFFSET_TOKEN     2
-#define GL2PS_BEGIN_BOUNDARY_TOKEN 3
-#define GL2PS_END_BOUNDARY_TOKEN   4
-#define GL2PS_BEGIN_STIPPLE_TOKEN  5
-#define GL2PS_END_STIPPLE_TOKEN    6
-#define GL2PS_POINT_SIZE_TOKEN     7
-#define GL2PS_LINE_WIDTH_TOKEN     8
-#define GL2PS_BEGIN_BLEND_TOKEN    9
-#define GL2PS_END_BLEND_TOKEN      10
-#define GL2PS_SRC_BLEND_TOKEN      11
-#define GL2PS_DST_BLEND_TOKEN      12
-#define GL2PS_IMAGEMAP_TOKEN       13
-#define GL2PS_DRAW_PIXELS_TOKEN    14
-#define GL2PS_TEXT_TOKEN           15
-
-typedef enum {
-  T_UNDEFINED    = -1,
-  T_CONST_COLOR  = 1,
-  T_VAR_COLOR    = 1<<1,
-  T_ALPHA_1      = 1<<2,
-  T_ALPHA_LESS_1 = 1<<3,
-  T_VAR_ALPHA    = 1<<4
-} GL2PS_TRIANGLE_PROPERTY;
-
-typedef GLfloat GL2PSxyz[3];
-typedef GLfloat GL2PSplane[4];
-
-typedef struct _GL2PSbsptree2d GL2PSbsptree2d;
-
-struct _GL2PSbsptree2d {
-  GL2PSplane plane;
-  GL2PSbsptree2d *front, *back;
-};
-
-typedef struct {
-  GLint nmax, size, incr, n;
-  char *array;
-} GL2PSlist;
-
-typedef struct _GL2PSbsptree GL2PSbsptree;
-
-struct _GL2PSbsptree {
-  GL2PSplane plane;
-  GL2PSlist *primitives;
-  GL2PSbsptree *front, *back;
-};
-
-typedef struct {
-  GL2PSxyz xyz;
-  GL2PSrgba rgba;
-} GL2PSvertex;
-
-typedef struct {
-  GL2PSvertex vertex[3];
-  int prop;
-} GL2PStriangle;
-
-typedef struct {
-  GLshort fontsize;
-  char *str, *fontname;
-  /* Note: for a 'special' string, 'alignment' holds the format
-     (PostScript, PDF, etc.) of the special string */
-  GLint alignment;
-  GLfloat angle;
-} GL2PSstring;
-
-typedef struct {
-  GLsizei width, height;
-  /* Note: for an imagemap, 'type' indicates if it has already been
-     written to the file or not, and 'format' indicates if it is
-     visible or not */
-  GLenum format, type;
-  GLfloat zoom_x, zoom_y;
-  GLfloat *pixels;
-} GL2PSimage;
-
-typedef struct _GL2PSimagemap GL2PSimagemap;
-
-struct _GL2PSimagemap {
-  GL2PSimage *image;
-  GL2PSimagemap *next;
-};
-
-typedef struct {
-  GLshort type, numverts;
-  GLushort pattern;
-  char boundary, offset, culled;
-  GLint factor;
-  GLfloat width;
-  GL2PSvertex *verts;
-  union {
-    GL2PSstring *text;
-    GL2PSimage *image;
-  } data;
-} GL2PSprimitive;
-
-typedef struct {
-#if defined(GL2PS_HAVE_ZLIB)
-  Bytef *dest, *src, *start;
-  uLongf destLen, srcLen;
-#else
-  int dummy;
-#endif
-} GL2PScompress;
-
-typedef struct{
-  GL2PSlist* ptrlist;
-  int gsno, fontno, imno, shno, maskshno, trgroupno;
-  int gsobjno, fontobjno, imobjno, shobjno, maskshobjno, trgroupobjno;
-} GL2PSpdfgroup;
-
-typedef struct {
-  /* General */
-  GLint format, sort, options, colorsize, colormode, buffersize;
-  char *title, *producer, *filename;
-  GLboolean boundary, blending;
-  GLfloat *feedback, offset[2], lastlinewidth;
-  GLint viewport[4], blendfunc[2], lastfactor;
-  GL2PSrgba *colormap, lastrgba, threshold, bgcolor;
-  GLushort lastpattern;
-  GL2PSvertex lastvertex;
-  GL2PSlist *primitives, *auxprimitives;
-  FILE *stream;
-  GL2PScompress *compress;
-  GLboolean header;
-
-  /* BSP-specific */
-  GLint maxbestroot;
-
-  /* Occlusion culling-specific */
-  GLboolean zerosurfacearea;
-  GL2PSbsptree2d *imagetree;
-  GL2PSprimitive *primitivetoadd;
-
-  /* PDF-specific */
-  int streamlength;
-  GL2PSlist *pdfprimlist, *pdfgrouplist;
-  int *xreflist;
-  int objects_stack; /* available objects */
-  int extgs_stack; /* graphics state object number */
-  int font_stack; /* font object number */
-  int im_stack; /* image object number */
-  int trgroupobjects_stack; /* xobject numbers */
-  int shader_stack; /* shader object numbers */
-  int mshader_stack; /* mask shader object numbers */
-
-  /* for image map list */
-  GL2PSimagemap *imagemap_head;
-  GL2PSimagemap *imagemap_tail;
-} GL2PScontext;
-
-typedef struct {
-  void  (*printHeader)(void);
-  void  (*printFooter)(void);
-  void  (*beginViewport)(GLint viewport[4]);
-  GLint (*endViewport)(void);
-  void  (*printPrimitive)(void *data);
-  void  (*printFinalPrimitive)(void);
-  const char *file_extension;
-  const char *description;
-} GL2PSbackend;
-
-/* The gl2ps context. gl2ps is not thread safe (we should create a
-   local GL2PScontext during gl2psBeginPage) */
-
-static GL2PScontext *gl2ps = NULL;
-
-/* Need to forward-declare this one */
-
-static GLint gl2psPrintPrimitives(void);
-
-/*********************************************************************
- *
- * Utility routines
- *
- *********************************************************************/
-
-static void gl2psMsg(GLint level, const char *fmt, ...)
-{
-  va_list args;
-
-  if(!(gl2ps->options & GL2PS_SILENT)){
-    switch(level){
-    case GL2PS_INFO : fprintf(stderr, "GL2PS info: "); break;
-    case GL2PS_WARNING : fprintf(stderr, "GL2PS warning: "); break;
-    case GL2PS_ERROR : fprintf(stderr, "GL2PS error: "); break;
-    }
-    va_start(args, fmt);
-    vfprintf(stderr, fmt, args);
-    va_end(args);
-    fprintf(stderr, "\n");
-  }
-  /* if(level == GL2PS_ERROR) exit(1); */
-}
-
-static void *gl2psMalloc(size_t size)
-{
-  void *ptr;
-
-  if(!size) return NULL;
-  ptr = malloc(size);
-  if(!ptr){
-    gl2psMsg(GL2PS_ERROR, "Couldn't allocate requested memory");
-    return NULL;
-  }
-  return ptr;
-}
-
-static void *gl2psRealloc(void *ptr, size_t size)
-{
-  void *orig = ptr;
-  if(!size) return NULL;
-  ptr = realloc(orig, size);
-  if(!ptr){
-    gl2psMsg(GL2PS_ERROR, "Couldn't reallocate requested memory");
-    free(orig);
-    return NULL;
-  }
-  return ptr;
-}
-
-static void gl2psFree(void *ptr)
-{
-  if(!ptr) return;
-  free(ptr);
-}
-
-static int gl2psWriteBigEndian(unsigned long data, int bytes)
-{
-  int i;
-  int size = sizeof(unsigned long);
-  for(i = 1; i <= bytes; ++i){
-    fputc(0xff & (data >> (size - i) * 8), gl2ps->stream);
-  }
-  return bytes;
-}
-
-/* zlib compression helper routines */
-
-#if defined(GL2PS_HAVE_ZLIB)
-
-static void gl2psSetupCompress(void)
-{
-  gl2ps->compress = (GL2PScompress*)gl2psMalloc(sizeof(GL2PScompress));
-  gl2ps->compress->src = NULL;
-  gl2ps->compress->start = NULL;
-  gl2ps->compress->dest = NULL;
-  gl2ps->compress->srcLen = 0;
-  gl2ps->compress->destLen = 0;
-}
-
-static void gl2psFreeCompress(void)
-{
-  if(!gl2ps->compress)
-    return;
-  gl2psFree(gl2ps->compress->start);
-  gl2psFree(gl2ps->compress->dest);
-  gl2ps->compress->src = NULL;
-  gl2ps->compress->start = NULL;
-  gl2ps->compress->dest = NULL;
-  gl2ps->compress->srcLen = 0;
-  gl2ps->compress->destLen = 0;
-}
-
-static int gl2psAllocCompress(unsigned int srcsize)
-{
-  gl2psFreeCompress();
-
-  if(!gl2ps->compress || !srcsize)
-    return GL2PS_ERROR;
-
-  gl2ps->compress->srcLen = srcsize;
-  gl2ps->compress->destLen = (int)ceil(1.001 * gl2ps->compress->srcLen + 12);
-  gl2ps->compress->src = (Bytef*)gl2psMalloc(gl2ps->compress->srcLen);
-  gl2ps->compress->start = gl2ps->compress->src;
-  gl2ps->compress->dest = (Bytef*)gl2psMalloc(gl2ps->compress->destLen);
-
-  return GL2PS_SUCCESS;
-}
-
-static void *gl2psReallocCompress(unsigned int srcsize)
-{
-  if(!gl2ps->compress || !srcsize)
-    return NULL;
-
-  if(srcsize < gl2ps->compress->srcLen)
-    return gl2ps->compress->start;
-
-  gl2ps->compress->srcLen = srcsize;
-  gl2ps->compress->destLen = (int)ceil(1.001 * gl2ps->compress->srcLen + 12);
-  gl2ps->compress->src = (Bytef*)gl2psRealloc(gl2ps->compress->src,
-                                              gl2ps->compress->srcLen);
-  gl2ps->compress->start = gl2ps->compress->src;
-  gl2ps->compress->dest = (Bytef*)gl2psRealloc(gl2ps->compress->dest,
-                                               gl2ps->compress->destLen);
-
-  return gl2ps->compress->start;
-}
-
-static int gl2psWriteBigEndianCompress(unsigned long data, int bytes)
-{
-  int i;
-  int size = sizeof(unsigned long);
-  for(i = 1; i <= bytes; ++i){
-    *gl2ps->compress->src = (Bytef)(0xff & (data >> (size-i) * 8));
-    ++gl2ps->compress->src;
-  }
-  return bytes;
-}
-
-static int gl2psDeflate(void)
-{
-  /* For compatibility with older zlib versions, we use compress(...)
-     instead of compress2(..., Z_BEST_COMPRESSION) */
-  return compress(gl2ps->compress->dest, &gl2ps->compress->destLen,
-                  gl2ps->compress->start, gl2ps->compress->srcLen);
-}
-
-#endif
-
-static int gl2psPrintf(const char* fmt, ...)
-{
-  int ret;
-  va_list args;
-
-#if defined(GL2PS_HAVE_ZLIB)
-  unsigned int oldsize = 0;
-  static char buf[1000];
-  if(gl2ps->options & GL2PS_COMPRESS){
-    va_start(args, fmt);
-    ret = vsprintf(buf, fmt, args);
-    va_end(args);
-    oldsize = gl2ps->compress->srcLen;
-    gl2ps->compress->start = (Bytef*)gl2psReallocCompress(oldsize + ret);
-    memcpy(gl2ps->compress->start+oldsize, buf, ret);
-    ret = 0;
-  }
-  else{
-#endif
-    va_start(args, fmt);
-    ret = vfprintf(gl2ps->stream, fmt, args);
-    va_end(args);
-#if defined(GL2PS_HAVE_ZLIB)
-  }
-#endif
-  return ret;
-}
-
-static void gl2psPrintGzipHeader(void)
-{
-#if defined(GL2PS_HAVE_ZLIB)
-  char tmp[10] = {'\x1f', '\x8b', /* magic numbers: 0x1f, 0x8b */
-                  8, /* compression method: Z_DEFLATED */
-                  0, /* flags */
-                  0, 0, 0, 0, /* time */
-                  2, /* extra flags: max compression */
-                  '\x03'}; /* OS code: 0x03 (Unix) */
-
-  if(gl2ps->options & GL2PS_COMPRESS){
-    gl2psSetupCompress();
-    /* add the gzip file header */
-    fwrite(tmp, 10, 1, gl2ps->stream);
-  }
-#endif
-}
-
-static void gl2psPrintGzipFooter(void)
-{
-#if defined(GL2PS_HAVE_ZLIB)
-  int n;
-  uLong crc, len;
-  char tmp[8];
-
-  if(gl2ps->options & GL2PS_COMPRESS){
-    if(Z_OK != gl2psDeflate()){
-      gl2psMsg(GL2PS_ERROR, "Zlib deflate error");
-    }
-    else{
-      /* determine the length of the header in the zlib stream */
-      n = 2; /* CMF+FLG */
-      if(gl2ps->compress->dest[1] & (1<<5)){
-        n += 4; /* DICTID */
-      }
-      /* write the data, without the zlib header and footer */
-      fwrite(gl2ps->compress->dest+n, gl2ps->compress->destLen-(n+4),
-             1, gl2ps->stream);
-      /* add the gzip file footer */
-      crc = crc32(0L, gl2ps->compress->start, gl2ps->compress->srcLen);
-      for(n = 0; n < 4; ++n){
-        tmp[n] = (char)(crc & 0xff);
-        crc >>= 8;
-      }
-      len = gl2ps->compress->srcLen;
-      for(n = 4; n < 8; ++n){
-        tmp[n] = (char)(len & 0xff);
-        len >>= 8;
-      }
-      fwrite(tmp, 8, 1, gl2ps->stream);
-    }
-    gl2psFreeCompress();
-    gl2psFree(gl2ps->compress);
-    gl2ps->compress = NULL;
-  }
-#endif
-}
-
-/* The list handling routines */
-
-static void gl2psListRealloc(GL2PSlist *list, GLint n)
-{
-  if(!list){
-    gl2psMsg(GL2PS_ERROR, "Cannot reallocate NULL list");
-    return;
-  }
-  if(n <= 0) return;
-  if(!list->array){
-    list->nmax = n;
-    list->array = (char*)gl2psMalloc(list->nmax * list->size);
-  }
-  else{
-    if(n > list->nmax){
-      list->nmax = ((n - 1) / list->incr + 1) * list->incr;
-      list->array = (char*)gl2psRealloc(list->array,
-                                        list->nmax * list->size);
-    }
-  }
-}
-
-static GL2PSlist *gl2psListCreate(GLint n, GLint incr, GLint size)
-{
-  GL2PSlist *list;
-
-  if(n < 0) n = 0;
-  if(incr <= 0) incr = 1;
-  list = (GL2PSlist*)gl2psMalloc(sizeof(GL2PSlist));
-  list->nmax = 0;
-  list->incr = incr;
-  list->size = size;
-  list->n = 0;
-  list->array = NULL;
-  gl2psListRealloc(list, n);
-  return list;
-}
-
-static void gl2psListReset(GL2PSlist *list)
-{
-  if(!list) return;
-  list->n = 0;
-}
-
-static void gl2psListDelete(GL2PSlist *list)
-{
-  if(!list) return;
-  gl2psFree(list->array);
-  gl2psFree(list);
-}
-
-static void gl2psListAdd(GL2PSlist *list, void *data)
-{
-  if(!list){
-    gl2psMsg(GL2PS_ERROR, "Cannot add into unallocated list");
-    return;
-  }
-  list->n++;
-  gl2psListRealloc(list, list->n);
-  memcpy(&list->array[(list->n - 1) * list->size], data, list->size);
-}
-
-static int gl2psListNbr(GL2PSlist *list)
-{
-  if(!list)
-    return 0;
-  return list->n;
-}
-
-static void *gl2psListPointer(GL2PSlist *list, GLint index)
-{
-  if(!list){
-    gl2psMsg(GL2PS_ERROR, "Cannot point into unallocated list");
-    return NULL;
-  }
-  if((index < 0) || (index >= list->n)){
-    gl2psMsg(GL2PS_ERROR, "Wrong list index in gl2psListPointer");
-    return NULL;
-  }
-  return &list->array[index * list->size];
-}
-
-static void gl2psListSort(GL2PSlist *list,
-                          int (*fcmp)(const void *a, const void *b))
-{
-  if(!list)
-    return;
-  qsort(list->array, list->n, list->size, fcmp);
-}
-
-static void gl2psListAction(GL2PSlist *list, void (*action)(void *data))
-{
-  GLint i;
-
-  for(i = 0; i < gl2psListNbr(list); i++){
-    (*action)(gl2psListPointer(list, i));
-  }
-}
-
-static void gl2psListActionInverse(GL2PSlist *list, void (*action)(void *data))
-{
-  GLint i;
-
-  for(i = gl2psListNbr(list); i > 0; i--){
-    (*action)(gl2psListPointer(list, i-1));
-  }
-}
-
-#if defined(GL2PS_HAVE_LIBPNG)
-
-static void gl2psListRead(GL2PSlist *list, int index, void *data)
-{
-  if((index < 0) || (index >= list->n))
-    gl2psMsg(GL2PS_ERROR, "Wrong list index in gl2psListRead");
-  memcpy(data, &list->array[index * list->size], list->size);
-}
-
-static void gl2psEncodeBase64Block(unsigned char in[3], unsigned char out[4], int len)
-{
-  static const char cb64[] =
-    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-
-  out[0] = cb64[ in[0] >> 2 ];
-  out[1] = cb64[ ((in[0] & 0x03) << 4) | ((in[1] & 0xf0) >> 4) ];
-  out[2] = (len > 1) ? cb64[ ((in[1] & 0x0f) << 2) | ((in[2] & 0xc0) >> 6) ] : '=';
-  out[3] = (len > 2) ? cb64[ in[2] & 0x3f ] : '=';
-}
-
-static void gl2psListEncodeBase64(GL2PSlist *list)
-{
-  unsigned char *buffer, in[3], out[4];
-  int i, n, index, len;
-
-  n = list->n * list->size;
-  buffer = (unsigned char*)gl2psMalloc(n * sizeof(unsigned char));
-  memcpy(buffer, list->array, n * sizeof(unsigned char));
-  gl2psListReset(list);
-
-  index = 0;
-  while(index < n) {
-    len = 0;
-    for(i = 0; i < 3; i++) {
-      if(index < n){
-        in[i] = buffer[index];
-        len++;
-      }
-      else{
-        in[i] = 0;
-      }
-      index++;
-    }
-    if(len) {
-      gl2psEncodeBase64Block(in, out, len);
-      for(i = 0; i < 4; i++)
-        gl2psListAdd(list, &out[i]);
-    }
-  }
-  gl2psFree(buffer);
-}
-
-#endif
-
-/* Helpers for rgba colors */
-
-static GLboolean gl2psSameColor(GL2PSrgba rgba1, GL2PSrgba rgba2)
-{
-  if(!GL2PS_ZERO(rgba1[0] - rgba2[0]) ||
-     !GL2PS_ZERO(rgba1[1] - rgba2[1]) ||
-     !GL2PS_ZERO(rgba1[2] - rgba2[2]))
-    return GL_FALSE;
-  return GL_TRUE;
-}
-
-static GLboolean gl2psVertsSameColor(const GL2PSprimitive *prim)
-{
-  int i;
-
-  for(i = 1; i < prim->numverts; i++){
-    if(!gl2psSameColor(prim->verts[0].rgba, prim->verts[i].rgba)){
-      return GL_FALSE;
-    }
-  }
-  return GL_TRUE;
-}
-
-static GLboolean gl2psSameColorThreshold(int n, GL2PSrgba rgba[],
-                                         GL2PSrgba threshold)
-{
-  int i;
-
-  if(n < 2) return GL_TRUE;
-
-  for(i = 1; i < n; i++){
-    if(fabs(rgba[0][0] - rgba[i][0]) > threshold[0] ||
-       fabs(rgba[0][1] - rgba[i][1]) > threshold[1] ||
-       fabs(rgba[0][2] - rgba[i][2]) > threshold[2])
-      return GL_FALSE;
-  }
-
-  return GL_TRUE;
-}
-
-static void gl2psSetLastColor(GL2PSrgba rgba)
-{
-  int i;
-  for(i = 0; i < 3; ++i){
-    gl2ps->lastrgba[i] = rgba[i];
-  }
-}
-
-static GLfloat gl2psGetRGB(GL2PSimage *im, GLuint x, GLuint y,
-                           GLfloat *red, GLfloat *green, GLfloat *blue)
-{
-
-  GLsizei width = im->width;
-  GLsizei height = im->height;
-  GLfloat *pixels = im->pixels;
-  GLfloat *pimag;
-
-  /* OpenGL image is from down to up, PS image is up to down */
-  switch(im->format){
-  case GL_RGBA:
-    pimag = pixels + 4 * (width * (height - 1 - y) + x);
-    break;
-  case GL_RGB:
-  default:
-    pimag = pixels + 3 * (width * (height - 1 - y) + x);
-    break;
-  }
-  *red = *pimag; pimag++;
-  *green = *pimag; pimag++;
-  *blue = *pimag; pimag++;
-
-  return (im->format == GL_RGBA) ? *pimag : 1.0F;
-}
-
-/* Helper routines for pixmaps */
-
-static GL2PSimage *gl2psCopyPixmap(GL2PSimage *im)
-{
-  int size;
-  GL2PSimage *image = (GL2PSimage*)gl2psMalloc(sizeof(GL2PSimage));
-
-  image->width = im->width;
-  image->height = im->height;
-  image->format = im->format;
-  image->type = im->type;
-  image->zoom_x = im->zoom_x;
-  image->zoom_y = im->zoom_y;
-
-  switch(image->format){
-  case GL_RGBA:
-    size = image->height * image->width * 4 * sizeof(GLfloat);
-    break;
-  case GL_RGB:
-  default:
-    size = image->height * image->width * 3 * sizeof(GLfloat);
-    break;
-  }
-
-  image->pixels = (GLfloat*)gl2psMalloc(size);
-  memcpy(image->pixels, im->pixels, size);
-
-  return image;
-}
-
-static void gl2psFreePixmap(GL2PSimage *im)
-{
-  if(!im)
-    return;
-  gl2psFree(im->pixels);
-  gl2psFree(im);
-}
-
-#if defined(GL2PS_HAVE_LIBPNG)
-
-#if !defined(png_jmpbuf)
-#  define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
-#endif
-
-static void gl2psUserWritePNG(png_structp png_ptr, png_bytep data, png_size_t length)
-{
-  unsigned int i;
-  GL2PSlist *png = (GL2PSlist*)png_get_io_ptr(png_ptr);
-  for(i = 0; i < length; i++)
-    gl2psListAdd(png, &data[i]);
-}
-
-static void gl2psUserFlushPNG(png_structp png_ptr)
-{
-  (void) png_ptr;  /* not used */
-}
-
-static void gl2psConvertPixmapToPNG(GL2PSimage *pixmap, GL2PSlist *png)
-{
-  png_structp png_ptr;
-  png_infop info_ptr;
-  unsigned char *row_data;
-  GLfloat dr, dg, db;
-  int row, col;
-
-  if(!(png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL)))
-    return;
-
-  if(!(info_ptr = png_create_info_struct(png_ptr))){
-    png_destroy_write_struct(&png_ptr, NULL);
-    return;
-  }
-
-  if(setjmp(png_jmpbuf(png_ptr))) {
-    png_destroy_write_struct(&png_ptr, &info_ptr);
-    return;
-  }
-
-  png_set_write_fn(png_ptr, (void *)png, gl2psUserWritePNG, gl2psUserFlushPNG);
-  png_set_compression_level(png_ptr, Z_DEFAULT_COMPRESSION);
-  png_set_IHDR(png_ptr, info_ptr, pixmap->width, pixmap->height, 8,
-               PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE,
-               PNG_FILTER_TYPE_BASE);
-  png_write_info(png_ptr, info_ptr);
-
-  row_data = (unsigned char*)gl2psMalloc(3 * pixmap->width * sizeof(unsigned char));
-  for(row = 0; row < pixmap->height; row++){
-    for(col = 0; col < pixmap->width; col++){
-      gl2psGetRGB(pixmap, col, row, &dr, &dg, &db);
-      row_data[3*col] = (unsigned char)(255. * dr);
-      row_data[3*col+1] = (unsigned char)(255. * dg);
-      row_data[3*col+2] = (unsigned char)(255. * db);
-    }
-    png_write_row(png_ptr, (png_bytep)row_data);
-  }
-  gl2psFree(row_data);
-
-  png_write_end(png_ptr, info_ptr);
-  png_destroy_write_struct(&png_ptr, &info_ptr);
-}
-
-#endif
-
-/* Helper routines for text strings */
-
-static GLint gl2psAddText(GLint type, const char *str, const char *fontname,
-                          GLshort fontsize, GLint alignment, GLfloat angle)
-{
-  GLfloat pos[4];
-  GL2PSprimitive *prim;
-  GLboolean valid;
-
-  if(!gl2ps || !str || !fontname) return GL2PS_UNINITIALIZED;
-
-  if(gl2ps->options & GL2PS_NO_TEXT) return GL2PS_SUCCESS;
-
-  glGetBooleanv(GL_CURRENT_RASTER_POSITION_VALID, &valid);
-  if(GL_FALSE == valid) return GL2PS_SUCCESS; /* the primitive is culled */
-
-  glGetFloatv(GL_CURRENT_RASTER_POSITION, pos);
-
-  prim = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive));
-  prim->type = type;
-  prim->boundary = 0;
-  prim->numverts = 1;
-  prim->verts = (GL2PSvertex*)gl2psMalloc(sizeof(GL2PSvertex));
-  prim->verts[0].xyz[0] = pos[0];
-  prim->verts[0].xyz[1] = pos[1];
-  prim->verts[0].xyz[2] = pos[2];
-  prim->culled = 0;
-  prim->offset = 0;
-  prim->pattern = 0;
-  prim->factor = 0;
-  prim->width = 1;
-  glGetFloatv(GL_CURRENT_RASTER_COLOR, prim->verts[0].rgba);
-  prim->data.text = (GL2PSstring*)gl2psMalloc(sizeof(GL2PSstring));
-  prim->data.text->str = (char*)gl2psMalloc((strlen(str)+1)*sizeof(char));
-  strcpy(prim->data.text->str, str);
-  prim->data.text->fontname = (char*)gl2psMalloc((strlen(fontname)+1)*sizeof(char));
-  strcpy(prim->data.text->fontname, fontname);
-  prim->data.text->fontsize = fontsize;
-  prim->data.text->alignment = alignment;
-  prim->data.text->angle = angle;
-
-  gl2psListAdd(gl2ps->auxprimitives, &prim);
-  glPassThrough(GL2PS_TEXT_TOKEN);
-
-  return GL2PS_SUCCESS;
-}
-
-static GL2PSstring *gl2psCopyText(GL2PSstring *t)
-{
-  GL2PSstring *text = (GL2PSstring*)gl2psMalloc(sizeof(GL2PSstring));
-  text->str = (char*)gl2psMalloc((strlen(t->str)+1)*sizeof(char));
-  strcpy(text->str, t->str);
-  text->fontname = (char*)gl2psMalloc((strlen(t->fontname)+1)*sizeof(char));
-  strcpy(text->fontname, t->fontname);
-  text->fontsize = t->fontsize;
-  text->alignment = t->alignment;
-  text->angle = t->angle;
-
-  return text;
-}
-
-static void gl2psFreeText(GL2PSstring *text)
-{
-  if(!text)
-    return;
-  gl2psFree(text->str);
-  gl2psFree(text->fontname);
-  gl2psFree(text);
-}
-
-/* Helpers for blending modes */
-
-static GLboolean gl2psSupportedBlendMode(GLenum sfactor, GLenum dfactor)
-{
-  /* returns TRUE if gl2ps supports the argument combination: only two
-     blending modes have been implemented so far */
-
-  if( (sfactor == GL_SRC_ALPHA && dfactor == GL_ONE_MINUS_SRC_ALPHA) ||
-      (sfactor == GL_ONE && dfactor == GL_ZERO) )
-    return GL_TRUE;
-  return GL_FALSE;
-}
-
-static void gl2psAdaptVertexForBlending(GL2PSvertex *v)
-{
-  /* Transforms vertex depending on the actual blending function -
-     currently the vertex v is considered as source vertex and his
-     alpha value is changed to 1.0 if source blending GL_ONE is
-     active. This might be extended in the future */
-
-  if(!v || !gl2ps)
-    return;
-
-  if(gl2ps->options & GL2PS_NO_BLENDING || !gl2ps->blending){
-    v->rgba[3] = 1.0F;
-    return;
-  }
-
-  switch(gl2ps->blendfunc[0]){
-  case GL_ONE:
-    v->rgba[3] = 1.0F;
-    break;
-  default:
-    break;
-  }
-}
-
-static void gl2psAssignTriangleProperties(GL2PStriangle *t)
-{
-  /* int i; */
-
-  t->prop = T_VAR_COLOR;
-
-  /* Uncommenting the following lines activates an even more fine
-     grained distinction between triangle types - please don't delete,
-     a remarkable amount of PDF handling code inside this file depends
-     on it if activated */
-  /*
-  t->prop = T_CONST_COLOR;
-  for(i = 0; i < 3; ++i){
-    if(!GL2PS_ZERO(t->vertex[0].rgba[i] - t->vertex[1].rgba[i]) ||
-       !GL2PS_ZERO(t->vertex[1].rgba[i] - t->vertex[2].rgba[i])){
-      t->prop = T_VAR_COLOR;
-      break;
-    }
-  }
-  */
-
-  if(!GL2PS_ZERO(t->vertex[0].rgba[3] - t->vertex[1].rgba[3]) ||
-     !GL2PS_ZERO(t->vertex[1].rgba[3] - t->vertex[2].rgba[3])){
-    t->prop |= T_VAR_ALPHA;
-  }
-  else{
-    if(t->vertex[0].rgba[3] < 1)
-      t->prop |= T_ALPHA_LESS_1;
-    else
-      t->prop |= T_ALPHA_1;
-  }
-}
-
-static void gl2psFillTriangleFromPrimitive(GL2PStriangle *t, GL2PSprimitive *p,
-                                           GLboolean assignprops)
-{
-  t->vertex[0] = p->verts[0];
-  t->vertex[1] = p->verts[1];
-  t->vertex[2] = p->verts[2];
-  if(GL_TRUE == assignprops)
-    gl2psAssignTriangleProperties(t);
-}
-
-static void gl2psInitTriangle(GL2PStriangle *t)
-{
-  int i;
-  GL2PSvertex vertex = { {-1.0F, -1.0F, -1.0F}, {-1.0F, -1.0F, -1.0F, -1.0F} };
-  for(i = 0; i < 3; i++)
-    t->vertex[i] = vertex;
-  t->prop = T_UNDEFINED;
-}
-
-/* Miscellaneous helper routines */
-
-static GL2PSprimitive *gl2psCopyPrimitive(GL2PSprimitive *p)
-{
-  GL2PSprimitive *prim;
-
-  if(!p){
-    gl2psMsg(GL2PS_ERROR, "Trying to copy an empty primitive");
-    return NULL;
-  }
-
-  prim = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive));
-
-  prim->type = p->type;
-  prim->numverts = p->numverts;
-  prim->boundary = p->boundary;
-  prim->offset = p->offset;
-  prim->pattern = p->pattern;
-  prim->factor = p->factor;
-  prim->culled = p->culled;
-  prim->width = p->width;
-  prim->verts = (GL2PSvertex*)gl2psMalloc(p->numverts*sizeof(GL2PSvertex));
-  memcpy(prim->verts, p->verts, p->numverts * sizeof(GL2PSvertex));
-
-  switch(prim->type){
-  case GL2PS_PIXMAP :
-    prim->data.image = gl2psCopyPixmap(p->data.image);
-    break;
-  case GL2PS_TEXT :
-  case GL2PS_SPECIAL :
-    prim->data.text = gl2psCopyText(p->data.text);
-    break;
-  default:
-    break;
-  }
-
-  return prim;
-}
-
-static GLboolean gl2psSamePosition(GL2PSxyz p1, GL2PSxyz p2)
-{
-  if(!GL2PS_ZERO(p1[0] - p2[0]) ||
-     !GL2PS_ZERO(p1[1] - p2[1]) ||
-     !GL2PS_ZERO(p1[2] - p2[2]))
-    return GL_FALSE;
-  return GL_TRUE;
-}
-
-/*********************************************************************
- *
- * 3D sorting routines
- *
- *********************************************************************/
-
-static GLfloat gl2psComparePointPlane(GL2PSxyz point, GL2PSplane plane)
-{
-  return (plane[0] * point[0] +
-          plane[1] * point[1] +
-          plane[2] * point[2] +
-          plane[3]);
-}
-
-static GLfloat gl2psPsca(GLfloat *a, GLfloat *b)
-{
-  return (a[0]*b[0] + a[1]*b[1] + a[2]*b[2]);
-}
-
-static void gl2psPvec(GLfloat *a, GLfloat *b, GLfloat *c)
-{
-  c[0] = a[1]*b[2] - a[2]*b[1];
-  c[1] = a[2]*b[0] - a[0]*b[2];
-  c[2] = a[0]*b[1] - a[1]*b[0];
-}
-
-static GLfloat gl2psNorm(GLfloat *a)
-{
-  return (GLfloat)sqrt(a[0]*a[0] + a[1]*a[1] + a[2]*a[2]);
-}
-
-static void gl2psGetNormal(GLfloat *a, GLfloat *b, GLfloat *c)
-{
-  GLfloat norm;
-
-  gl2psPvec(a, b, c);
-  if(!GL2PS_ZERO(norm = gl2psNorm(c))){
-    c[0] = c[0] / norm;
-    c[1] = c[1] / norm;
-    c[2] = c[2] / norm;
-  }
-  else{
-    /* The plane is still wrong despite our tests in gl2psGetPlane.
-       Let's return a dummy value for now (this is a hack: we should
-       do more intelligent tests in GetPlane) */
-    c[0] = c[1] = 0.0F;
-    c[2] = 1.0F;
-  }
-}
-
-static void gl2psGetPlane(GL2PSprimitive *prim, GL2PSplane plane)
-{
-  GL2PSxyz v = {0.0F, 0.0F, 0.0F}, w = {0.0F, 0.0F, 0.0F};
-
-  switch(prim->type){
-  case GL2PS_TRIANGLE :
-  case GL2PS_QUADRANGLE :
-    v[0] = prim->verts[1].xyz[0] - prim->verts[0].xyz[0];
-    v[1] = prim->verts[1].xyz[1] - prim->verts[0].xyz[1];
-    v[2] = prim->verts[1].xyz[2] - prim->verts[0].xyz[2];
-    w[0] = prim->verts[2].xyz[0] - prim->verts[0].xyz[0];
-    w[1] = prim->verts[2].xyz[1] - prim->verts[0].xyz[1];
-    w[2] = prim->verts[2].xyz[2] - prim->verts[0].xyz[2];
-    if((GL2PS_ZERO(v[0]) && GL2PS_ZERO(v[1]) && GL2PS_ZERO(v[2])) ||
-       (GL2PS_ZERO(w[0]) && GL2PS_ZERO(w[1]) && GL2PS_ZERO(w[2]))){
-      plane[0] = plane[1] = 0.0F;
-      plane[2] = 1.0F;
-      plane[3] = -prim->verts[0].xyz[2];
-    }
-    else{
-      gl2psGetNormal(v, w, plane);
-      plane[3] =
-        - plane[0] * prim->verts[0].xyz[0]
-        - plane[1] * prim->verts[0].xyz[1]
-        - plane[2] * prim->verts[0].xyz[2];
-    }
-    break;
-  case GL2PS_LINE :
-    v[0] = prim->verts[1].xyz[0] - prim->verts[0].xyz[0];
-    v[1] = prim->verts[1].xyz[1] - prim->verts[0].xyz[1];
-    v[2] = prim->verts[1].xyz[2] - prim->verts[0].xyz[2];
-    if(GL2PS_ZERO(v[0]) && GL2PS_ZERO(v[1]) && GL2PS_ZERO(v[2])){
-      plane[0] = plane[1] = 0.0F;
-      plane[2] = 1.0F;
-      plane[3] = -prim->verts[0].xyz[2];
-    }
-    else{
-      if(GL2PS_ZERO(v[0]))      w[0] = 1.0F;
-      else if(GL2PS_ZERO(v[1])) w[1] = 1.0F;
-      else                      w[2] = 1.0F;
-      gl2psGetNormal(v, w, plane);
-      plane[3] =
-        - plane[0] * prim->verts[0].xyz[0]
-        - plane[1] * prim->verts[0].xyz[1]
-        - plane[2] * prim->verts[0].xyz[2];
-    }
-    break;
-  case GL2PS_POINT :
-  case GL2PS_PIXMAP :
-  case GL2PS_TEXT :
-  case GL2PS_SPECIAL :
-  case GL2PS_IMAGEMAP:
-    plane[0] = plane[1] = 0.0F;
-    plane[2] = 1.0F;
-    plane[3] = -prim->verts[0].xyz[2];
-    break;
-  default :
-    gl2psMsg(GL2PS_ERROR, "Unknown primitive type in BSP tree");
-    plane[0] = plane[1] = plane[3] = 0.0F;
-    plane[2] = 1.0F;
-    break;
-  }
-}
-
-static void gl2psCutEdge(GL2PSvertex *a, GL2PSvertex *b, GL2PSplane plane,
-                         GL2PSvertex *c)
-{
-  GL2PSxyz v;
-  GLfloat sect, psca;
-
-  v[0] = b->xyz[0] - a->xyz[0];
-  v[1] = b->xyz[1] - a->xyz[1];
-  v[2] = b->xyz[2] - a->xyz[2];
-
-  if(!GL2PS_ZERO(psca = gl2psPsca(plane, v)))
-    sect = -gl2psComparePointPlane(a->xyz, plane) / psca;
-  else
-    sect = 0.0F;
-
-  c->xyz[0] = a->xyz[0] + v[0] * sect;
-  c->xyz[1] = a->xyz[1] + v[1] * sect;
-  c->xyz[2] = a->xyz[2] + v[2] * sect;
-
-  c->rgba[0] = (1 - sect) * a->rgba[0] + sect * b->rgba[0];
-  c->rgba[1] = (1 - sect) * a->rgba[1] + sect * b->rgba[1];
-  c->rgba[2] = (1 - sect) * a->rgba[2] + sect * b->rgba[2];
-  c->rgba[3] = (1 - sect) * a->rgba[3] + sect * b->rgba[3];
-}
-
-static void gl2psCreateSplitPrimitive(GL2PSprimitive *parent, GL2PSplane plane,
-                                      GL2PSprimitive *child, GLshort numverts,
-                                      GLshort *index0, GLshort *index1)
-{
-  GLshort i;
-
-  if(parent->type == GL2PS_IMAGEMAP){
-    child->type = GL2PS_IMAGEMAP;
-    child->data.image = parent->data.image;
-  }
-  else{
-    if(numverts > 4){
-      gl2psMsg(GL2PS_WARNING, "%d vertices in polygon", numverts);
-      numverts = 4;
-    }
-    switch(numverts){
-    case 1 : child->type = GL2PS_POINT; break;
-    case 2 : child->type = GL2PS_LINE; break;
-    case 3 : child->type = GL2PS_TRIANGLE; break;
-    case 4 : child->type = GL2PS_QUADRANGLE; break;
-    default: child->type = GL2PS_NO_TYPE; break;
-    }
-  }
-
-  child->boundary = 0; /* FIXME: not done! */
-  child->culled = parent->culled;
-  child->offset = parent->offset;
-  child->pattern = parent->pattern;
-  child->factor = parent->factor;
-  child->width = parent->width;
-  child->numverts = numverts;
-  child->verts = (GL2PSvertex*)gl2psMalloc(numverts * sizeof(GL2PSvertex));
-
-  for(i = 0; i < numverts; i++){
-    if(index1[i] < 0){
-      child->verts[i] = parent->verts[index0[i]];
-    }
-    else{
-      gl2psCutEdge(&parent->verts[index0[i]], &parent->verts[index1[i]],
-                   plane, &child->verts[i]);
-    }
-  }
-}
-
-static void gl2psAddIndex(GLshort *index0, GLshort *index1, GLshort *nb,
-                          GLshort i, GLshort j)
-{
-  GLint k;
-
-  for(k = 0; k < *nb; k++){
-    if((index0[k] == i && index1[k] == j) ||
-       (index1[k] == i && index0[k] == j)) return;
-  }
-  index0[*nb] = i;
-  index1[*nb] = j;
-  (*nb)++;
-}
-
-static GLshort gl2psGetIndex(GLshort i, GLshort num)
-{
-  return (i < num - 1) ? i + 1 : 0;
-}
-
-static GLint gl2psTestSplitPrimitive(GL2PSprimitive *prim, GL2PSplane plane)
-{
-  GLint type = GL2PS_COINCIDENT;
-  GLshort i, j;
-  GLfloat d[5];
-
-  for(i = 0; i < prim->numverts; i++){
-    d[i] = gl2psComparePointPlane(prim->verts[i].xyz, plane);
-  }
-
-  if(prim->numverts < 2){
-    return 0;
-  }
-  else{
-    for(i = 0; i < prim->numverts; i++){
-      j = gl2psGetIndex(i, prim->numverts);
-      if(d[j] > GL2PS_EPSILON){
-        if(type == GL2PS_COINCIDENT)      type = GL2PS_IN_BACK_OF;
-        else if(type != GL2PS_IN_BACK_OF) return 1;
-        if(d[i] < -GL2PS_EPSILON)         return 1;
-      }
-      else if(d[j] < -GL2PS_EPSILON){
-        if(type == GL2PS_COINCIDENT)       type = GL2PS_IN_FRONT_OF;
-        else if(type != GL2PS_IN_FRONT_OF) return 1;
-        if(d[i] > GL2PS_EPSILON)           return 1;
-      }
-    }
-  }
-  return 0;
-}
-
-static GLint gl2psSplitPrimitive(GL2PSprimitive *prim, GL2PSplane plane,
-                                 GL2PSprimitive **front, GL2PSprimitive **back)
-{
-  GLshort i, j, in = 0, out = 0, in0[5], in1[5], out0[5], out1[5];
-  GLint type;
-  GLfloat d[5];
-
-  type = GL2PS_COINCIDENT;
-
-  for(i = 0; i < prim->numverts; i++){
-    d[i] = gl2psComparePointPlane(prim->verts[i].xyz, plane);
-  }
-
-  switch(prim->type){
-  case GL2PS_POINT :
-    if(d[0] > GL2PS_EPSILON)       type = GL2PS_IN_BACK_OF;
-    else if(d[0] < -GL2PS_EPSILON) type = GL2PS_IN_FRONT_OF;
-    else                           type = GL2PS_COINCIDENT;
-    break;
-  default :
-    for(i = 0; i < prim->numverts; i++){
-      j = gl2psGetIndex(i, prim->numverts);
-      if(d[j] > GL2PS_EPSILON){
-        if(type == GL2PS_COINCIDENT)      type = GL2PS_IN_BACK_OF;
-        else if(type != GL2PS_IN_BACK_OF) type = GL2PS_SPANNING;
-        if(d[i] < -GL2PS_EPSILON){
-          gl2psAddIndex(in0, in1, &in, i, j);
-          gl2psAddIndex(out0, out1, &out, i, j);
-          type = GL2PS_SPANNING;
-        }
-        gl2psAddIndex(out0, out1, &out, j, -1);
-      }
-      else if(d[j] < -GL2PS_EPSILON){
-        if(type == GL2PS_COINCIDENT)       type = GL2PS_IN_FRONT_OF;
-        else if(type != GL2PS_IN_FRONT_OF) type = GL2PS_SPANNING;
-        if(d[i] > GL2PS_EPSILON){
-          gl2psAddIndex(in0, in1, &in, i, j);
-          gl2psAddIndex(out0, out1, &out, i, j);
-          type = GL2PS_SPANNING;
-        }
-        gl2psAddIndex(in0, in1, &in, j, -1);
-      }
-      else{
-        gl2psAddIndex(in0, in1, &in, j, -1);
-        gl2psAddIndex(out0, out1, &out, j, -1);
-      }
-    }
-    break;
-  }
-
-  if(type == GL2PS_SPANNING){
-    *back = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive));
-    *front = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive));
-    gl2psCreateSplitPrimitive(prim, plane, *back, out, out0, out1);
-    gl2psCreateSplitPrimitive(prim, plane, *front, in, in0, in1);
-  }
-
-  return type;
-}
-
-static void gl2psDivideQuad(GL2PSprimitive *quad,
-                            GL2PSprimitive **t1, GL2PSprimitive **t2)
-{
-  *t1 = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive));
-  *t2 = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive));
-  (*t1)->type = (*t2)->type = GL2PS_TRIANGLE;
-  (*t1)->numverts = (*t2)->numverts = 3;
-  (*t1)->culled = (*t2)->culled = quad->culled;
-  (*t1)->offset = (*t2)->offset = quad->offset;
-  (*t1)->pattern = (*t2)->pattern = quad->pattern;
-  (*t1)->factor = (*t2)->factor = quad->factor;
-  (*t1)->width = (*t2)->width = quad->width;
-  (*t1)->verts = (GL2PSvertex*)gl2psMalloc(3 * sizeof(GL2PSvertex));
-  (*t2)->verts = (GL2PSvertex*)gl2psMalloc(3 * sizeof(GL2PSvertex));
-  (*t1)->verts[0] = quad->verts[0];
-  (*t1)->verts[1] = quad->verts[1];
-  (*t1)->verts[2] = quad->verts[2];
-  (*t1)->boundary = ((quad->boundary & 1) ? 1 : 0) | ((quad->boundary & 2) ? 2 : 0);
-  (*t2)->verts[0] = quad->verts[0];
-  (*t2)->verts[1] = quad->verts[2];
-  (*t2)->verts[2] = quad->verts[3];
-  (*t2)->boundary = ((quad->boundary & 4) ? 2 : 0) | ((quad->boundary & 8) ? 4 : 0);
-}
-
-static int gl2psCompareDepth(const void *a, const void *b)
-{
-  const GL2PSprimitive *q, *w;
-  GLfloat dq = 0.0F, dw = 0.0F, diff;
-  int i;
-
-  q = *(const GL2PSprimitive* const*)a;
-  w = *(const GL2PSprimitive* const*)b;
-
-  for(i = 0; i < q->numverts; i++){
-    dq += q->verts[i].xyz[2];
-  }
-  dq /= (GLfloat)q->numverts;
-
-  for(i = 0; i < w->numverts; i++){
-    dw += w->verts[i].xyz[2];
-  }
-  dw /= (GLfloat)w->numverts;
-
-  diff = dq - dw;
-  if(diff > 0.){
-    return -1;
-  }
-  else if(diff < 0.){
-    return 1;
-  }
-  else{
-    return 0;
-  }
-}
-
-static int gl2psTrianglesFirst(const void *a, const void *b)
-{
-  const GL2PSprimitive *q, *w;
-
-  q = *(const GL2PSprimitive* const*)a;
-  w = *(const GL2PSprimitive* const*)b;
-  return (q->type < w->type ? 1 : -1);
-}
-
-static GLint gl2psFindRoot(GL2PSlist *primitives, GL2PSprimitive **root)
-{
-  GLint i, j, count, best = 1000000, index = 0;
-  GL2PSprimitive *prim1, *prim2;
-  GL2PSplane plane;
-  GLint maxp;
-
-  if(!gl2psListNbr(primitives)){
-    gl2psMsg(GL2PS_ERROR, "Cannot fint root in empty primitive list");
-    return 0;
-  }
-
-  *root = *(GL2PSprimitive**)gl2psListPointer(primitives, 0);
-
-  if(gl2ps->options & GL2PS_BEST_ROOT){
-    maxp = gl2psListNbr(primitives);
-    if(maxp > gl2ps->maxbestroot){
-      maxp = gl2ps->maxbestroot;
-    }
-    for(i = 0; i < maxp; i++){
-      prim1 = *(GL2PSprimitive**)gl2psListPointer(primitives, i);
-      gl2psGetPlane(prim1, plane);
-      count = 0;
-      for(j = 0; j < gl2psListNbr(primitives); j++){
-        if(j != i){
-          prim2 = *(GL2PSprimitive**)gl2psListPointer(primitives, j);
-          count += gl2psTestSplitPrimitive(prim2, plane);
-        }
-        if(count > best) break;
-      }
-      if(count < best){
-        best = count;
-        index = i;
-        *root = prim1;
-        if(!count) return index;
-      }
-    }
-    /* if(index) gl2psMsg(GL2PS_INFO, "GL2PS_BEST_ROOT was worth it: %d", index); */
-    return index;
-  }
-  else{
-    return 0;
-  }
-}
-
-static void gl2psFreeImagemap(GL2PSimagemap *list)
-{
-  GL2PSimagemap *next;
-  while(list != NULL){
-    next = list->next;
-    gl2psFree(list->image->pixels);
-    gl2psFree(list->image);
-    gl2psFree(list);
-    list = next;
-  }
-}
-
-static void gl2psFreePrimitive(void *data)
-{
-  GL2PSprimitive *q;
-
-  q = *(GL2PSprimitive**)data;
-  gl2psFree(q->verts);
-  if(q->type == GL2PS_TEXT || q->type == GL2PS_SPECIAL){
-    gl2psFreeText(q->data.text);
-  }
-  else if(q->type == GL2PS_PIXMAP){
-    gl2psFreePixmap(q->data.image);
-  }
-  gl2psFree(q);
-}
-
-static void gl2psAddPrimitiveInList(GL2PSprimitive *prim, GL2PSlist *list)
-{
-  GL2PSprimitive *t1, *t2;
-
-  if(prim->type != GL2PS_QUADRANGLE){
-    gl2psListAdd(list, &prim);
-  }
-  else{
-    gl2psDivideQuad(prim, &t1, &t2);
-    gl2psListAdd(list, &t1);
-    gl2psListAdd(list, &t2);
-    gl2psFreePrimitive(&prim);
-  }
-
-}
-
-static void gl2psFreeBspTree(GL2PSbsptree **tree)
-{
-  if(*tree){
-    if((*tree)->back) gl2psFreeBspTree(&(*tree)->back);
-    if((*tree)->primitives){
-      gl2psListAction((*tree)->primitives, gl2psFreePrimitive);
-      gl2psListDelete((*tree)->primitives);
-    }
-    if((*tree)->front) gl2psFreeBspTree(&(*tree)->front);
-    gl2psFree(*tree);
-    *tree = NULL;
-  }
-}
-
-static GLboolean gl2psGreater(GLfloat f1, GLfloat f2)
-{
-  if(f1 > f2) return GL_TRUE;
-  else return GL_FALSE;
-}
-
-static GLboolean gl2psLess(GLfloat f1, GLfloat f2)
-{
-  if(f1 < f2) return GL_TRUE;
-  else return GL_FALSE;
-}
-
-static void gl2psBuildBspTree(GL2PSbsptree *tree, GL2PSlist *primitives)
-{
-  GL2PSprimitive *prim, *frontprim = NULL, *backprim = NULL;
-  GL2PSlist *frontlist, *backlist;
-  GLint i, index;
-
-  tree->front = NULL;
-  tree->back = NULL;
-  tree->primitives = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*));
-  index = gl2psFindRoot(primitives, &prim);
-  gl2psGetPlane(prim, tree->plane);
-  gl2psAddPrimitiveInList(prim, tree->primitives);
-
-  frontlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*));
-  backlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*));
-
-  for(i = 0; i < gl2psListNbr(primitives); i++){
-    if(i != index){
-      prim = *(GL2PSprimitive**)gl2psListPointer(primitives,i);
-      switch(gl2psSplitPrimitive(prim, tree->plane, &frontprim, &backprim)){
-      case GL2PS_COINCIDENT:
-        gl2psAddPrimitiveInList(prim, tree->primitives);
-        break;
-      case GL2PS_IN_BACK_OF:
-        gl2psAddPrimitiveInList(prim, backlist);
-        break;
-      case GL2PS_IN_FRONT_OF:
-        gl2psAddPrimitiveInList(prim, frontlist);
-        break;
-      case GL2PS_SPANNING:
-        gl2psAddPrimitiveInList(backprim, backlist);
-        gl2psAddPrimitiveInList(frontprim, frontlist);
-        gl2psFreePrimitive(&prim);
-        break;
-      }
-    }
-  }
-
-  if(gl2psListNbr(tree->primitives)){
-    gl2psListSort(tree->primitives, gl2psTrianglesFirst);
-  }
-
-  if(gl2psListNbr(frontlist)){
-    gl2psListSort(frontlist, gl2psTrianglesFirst);
-    tree->front = (GL2PSbsptree*)gl2psMalloc(sizeof(GL2PSbsptree));
-    gl2psBuildBspTree(tree->front, frontlist);
-  }
-  else{
-    gl2psListDelete(frontlist);
-  }
-
-  if(gl2psListNbr(backlist)){
-    gl2psListSort(backlist, gl2psTrianglesFirst);
-    tree->back = (GL2PSbsptree*)gl2psMalloc(sizeof(GL2PSbsptree));
-    gl2psBuildBspTree(tree->back, backlist);
-  }
-  else{
-    gl2psListDelete(backlist);
-  }
-
-  gl2psListDelete(primitives);
-}
-
-static void gl2psTraverseBspTree(GL2PSbsptree *tree, GL2PSxyz eye, GLfloat epsilon,
-                                 GLboolean (*compare)(GLfloat f1, GLfloat f2),
-                                 void (*action)(void *data), int inverse)
-{
-  GLfloat result;
-
-  if(!tree) return;
-
-  result = gl2psComparePointPlane(eye, tree->plane);
-
-  if(GL_TRUE == compare(result, epsilon)){
-    gl2psTraverseBspTree(tree->back, eye, epsilon, compare, action, inverse);
-    if(inverse){
-      gl2psListActionInverse(tree->primitives, action);
-    }
-    else{
-      gl2psListAction(tree->primitives, action);
-    }
-    gl2psTraverseBspTree(tree->front, eye, epsilon, compare, action, inverse);
-  }
-  else if(GL_TRUE == compare(-epsilon, result)){
-    gl2psTraverseBspTree(tree->front, eye, epsilon, compare, action, inverse);
-    if(inverse){
-      gl2psListActionInverse(tree->primitives, action);
-    }
-    else{
-      gl2psListAction(tree->primitives, action);
-    }
-    gl2psTraverseBspTree(tree->back, eye, epsilon, compare, action, inverse);
-  }
-  else{
-    gl2psTraverseBspTree(tree->front, eye, epsilon, compare, action, inverse);
-    gl2psTraverseBspTree(tree->back, eye, epsilon, compare, action, inverse);
-  }
-}
-
-static void gl2psRescaleAndOffset(void)
-{
-  GL2PSprimitive *prim;
-  GLfloat minZ, maxZ, rangeZ, scaleZ;
-  GLfloat factor, units, area, dZ, dZdX, dZdY, maxdZ;
-  int i, j;
-
-  if(!gl2psListNbr(gl2ps->primitives))
-    return;
-
-  /* get z-buffer range */
-  prim = *(GL2PSprimitive**)gl2psListPointer(gl2ps->primitives, 0);
-  minZ = maxZ = prim->verts[0].xyz[2];
-  for(i = 1; i < prim->numverts; i++){
-    if(prim->verts[i].xyz[2] < minZ) minZ = prim->verts[i].xyz[2];
-    if(prim->verts[i].xyz[2] > maxZ) maxZ = prim->verts[i].xyz[2];
-  }
-  for(i = 1; i < gl2psListNbr(gl2ps->primitives); i++){
-    prim = *(GL2PSprimitive**)gl2psListPointer(gl2ps->primitives, i);
-    for(j = 0; j < prim->numverts; j++){
-      if(prim->verts[j].xyz[2] < minZ) minZ = prim->verts[j].xyz[2];
-      if(prim->verts[j].xyz[2] > maxZ) maxZ = prim->verts[j].xyz[2];
-    }
-  }
-  rangeZ = (maxZ - minZ);
-
-  /* rescale z-buffer coordinate in [0,GL2PS_ZSCALE], to make it of
-     the same order of magnitude as the x and y coordinates */
-  scaleZ = GL2PS_ZERO(rangeZ) ? GL2PS_ZSCALE : (GL2PS_ZSCALE / rangeZ);
-  /* avoid precision loss (we use floats!) */
-  if(scaleZ > 100000.F) scaleZ = 100000.F;
-
-  /* apply offsets */
-  for(i = 0; i < gl2psListNbr(gl2ps->primitives); i++){
-    prim = *(GL2PSprimitive**)gl2psListPointer(gl2ps->primitives, i);
-    for(j = 0; j < prim->numverts; j++){
-      prim->verts[j].xyz[2] = (prim->verts[j].xyz[2] - minZ) * scaleZ;
-    }
-    if((gl2ps->options & GL2PS_SIMPLE_LINE_OFFSET) &&
-       (prim->type == GL2PS_LINE)){
-      if(gl2ps->sort == GL2PS_SIMPLE_SORT){
-        prim->verts[0].xyz[2] -= GL2PS_ZOFFSET_LARGE;
-        prim->verts[1].xyz[2] -= GL2PS_ZOFFSET_LARGE;
-      }
-      else{
-        prim->verts[0].xyz[2] -= GL2PS_ZOFFSET;
-        prim->verts[1].xyz[2] -= GL2PS_ZOFFSET;
-      }
-    }
-    else if(prim->offset && (prim->type == GL2PS_TRIANGLE)){
-      factor = gl2ps->offset[0];
-      units = gl2ps->offset[1];
-      area =
-        (prim->verts[1].xyz[0] - prim->verts[0].xyz[0]) *
-        (prim->verts[2].xyz[1] - prim->verts[1].xyz[1]) -
-        (prim->verts[2].xyz[0] - prim->verts[1].xyz[0]) *
-        (prim->verts[1].xyz[1] - prim->verts[0].xyz[1]);
-      if(!GL2PS_ZERO(area)){
-        dZdX =
-          ((prim->verts[2].xyz[1] - prim->verts[1].xyz[1]) *
-           (prim->verts[1].xyz[2] - prim->verts[0].xyz[2]) -
-           (prim->verts[1].xyz[1] - prim->verts[0].xyz[1]) *
-           (prim->verts[2].xyz[2] - prim->verts[1].xyz[2])) / area;
-        dZdY =
-          ((prim->verts[1].xyz[0] - prim->verts[0].xyz[0]) *
-           (prim->verts[2].xyz[2] - prim->verts[1].xyz[2]) -
-           (prim->verts[2].xyz[0] - prim->verts[1].xyz[0]) *
-           (prim->verts[1].xyz[2] - prim->verts[0].xyz[2])) / area;
-        maxdZ = (GLfloat)sqrt(dZdX * dZdX + dZdY * dZdY);
-      }
-      else{
-        maxdZ = 0.0F;
-      }
-      dZ = factor * maxdZ + units;
-      prim->verts[0].xyz[2] += dZ;
-      prim->verts[1].xyz[2] += dZ;
-      prim->verts[2].xyz[2] += dZ;
-    }
-  }
-}
-
-/*********************************************************************
- *
- * 2D sorting routines (for occlusion culling)
- *
- *********************************************************************/
-
-static GLint gl2psGetPlaneFromPoints(GL2PSxyz a, GL2PSxyz b, GL2PSplane plane)
-{
-  GLfloat n;
-
-  plane[0] = b[1] - a[1];
-  plane[1] = a[0] - b[0];
-  n = (GLfloat)sqrt(plane[0]*plane[0] + plane[1]*plane[1]);
-  plane[2] = 0.0F;
-  if(!GL2PS_ZERO(n)){
-    plane[0] /= n;
-    plane[1] /= n;
-    plane[3] = -plane[0]*a[0]-plane[1]*a[1];
-    return 1;
-  }
-  else{
-    plane[0] = -1.0F;
-    plane[1] = 0.0F;
-    plane[3] = a[0];
-    return 0;
-  }
-}
-
-static void gl2psFreeBspImageTree(GL2PSbsptree2d **tree)
-{
-  if(*tree){
-    if((*tree)->back)  gl2psFreeBspImageTree(&(*tree)->back);
-    if((*tree)->front) gl2psFreeBspImageTree(&(*tree)->front);
-    gl2psFree(*tree);
-    *tree = NULL;
-  }
-}
-
-static GLint gl2psCheckPoint(GL2PSxyz point, GL2PSplane plane)
-{
-  GLfloat pt_dis;
-
-  pt_dis = gl2psComparePointPlane(point, plane);
-  if(pt_dis > GL2PS_EPSILON)        return GL2PS_POINT_INFRONT;
-  else if(pt_dis < -GL2PS_EPSILON)  return GL2PS_POINT_BACK;
-  else                              return GL2PS_POINT_COINCIDENT;
-}
-
-static void gl2psAddPlanesInBspTreeImage(GL2PSprimitive *prim,
-                                         GL2PSbsptree2d **tree)
-{
-  GLint ret = 0;
-  GLint i;
-  GLint offset = 0;
-  GL2PSbsptree2d *head = NULL, *cur = NULL;
-
-  if((*tree == NULL) && (prim->numverts > 2)){
-    /* don't cull if transparent
-    for(i = 0; i < prim->numverts - 1; i++)
-      if(prim->verts[i].rgba[3] < 1.0F) return;
-    */
-    head = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d));
-    for(i = 0; i < prim->numverts-1; i++){
-      if(!gl2psGetPlaneFromPoints(prim->verts[i].xyz,
-                                  prim->verts[i+1].xyz,
-                                  head->plane)){
-        if(prim->numverts-i > 3){
-          offset++;
-        }
-        else{
-          gl2psFree(head);
-          return;
-        }
-      }
-      else{
-        break;
-      }
-    }
-    head->back = NULL;
-    head->front = NULL;
-    for(i = 2+offset; i < prim->numverts; i++){
-      ret = gl2psCheckPoint(prim->verts[i].xyz, head->plane);
-      if(ret != GL2PS_POINT_COINCIDENT) break;
-    }
-    switch(ret){
-    case GL2PS_POINT_INFRONT :
-      cur = head;
-      for(i = 1+offset; i < prim->numverts-1; i++){
-        if(cur->front == NULL){
-          cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d));
-        }
-        if(gl2psGetPlaneFromPoints(prim->verts[i].xyz,
-                                   prim->verts[i+1].xyz,
-                                   cur->front->plane)){
-          cur = cur->front;
-          cur->front = NULL;
-          cur->back = NULL;
-        }
-      }
-      if(cur->front == NULL){
-        cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d));
-      }
-      if(gl2psGetPlaneFromPoints(prim->verts[i].xyz,
-                                 prim->verts[offset].xyz,
-                                 cur->front->plane)){
-        cur->front->front = NULL;
-        cur->front->back = NULL;
-      }
-      else{
-        gl2psFree(cur->front);
-        cur->front = NULL;
-      }
-      break;
-    case GL2PS_POINT_BACK :
-      for(i = 0; i < 4; i++){
-        head->plane[i] = -head->plane[i];
-      }
-      cur = head;
-      for(i = 1+offset; i < prim->numverts-1; i++){
-        if(cur->front == NULL){
-          cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d));
-        }
-        if(gl2psGetPlaneFromPoints(prim->verts[i+1].xyz,
-                                   prim->verts[i].xyz,
-                                   cur->front->plane)){
-          cur = cur->front;
-          cur->front = NULL;
-          cur->back = NULL;
-        }
-      }
-      if(cur->front == NULL){
-        cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d));
-      }
-      if(gl2psGetPlaneFromPoints(prim->verts[offset].xyz,
-                                 prim->verts[i].xyz,
-                                 cur->front->plane)){
-        cur->front->front = NULL;
-        cur->front->back = NULL;
-      }
-      else{
-        gl2psFree(cur->front);
-        cur->front = NULL;
-      }
-      break;
-    default:
-      gl2psFree(head);
-      return;
-    }
-    (*tree) = head;
-  }
-}
-
-static GLint gl2psCheckPrimitive(GL2PSprimitive *prim, GL2PSplane plane)
-{
-  GLint i;
-  GLint pos;
-
-  pos = gl2psCheckPoint(prim->verts[0].xyz, plane);
-  for(i = 1; i < prim->numverts; i++){
-    pos |= gl2psCheckPoint(prim->verts[i].xyz, plane);
-    if(pos == (GL2PS_POINT_INFRONT | GL2PS_POINT_BACK)) return GL2PS_SPANNING;
-  }
-  if(pos & GL2PS_POINT_INFRONT)   return GL2PS_IN_FRONT_OF;
-  else if(pos & GL2PS_POINT_BACK) return GL2PS_IN_BACK_OF;
-  else                            return GL2PS_COINCIDENT;
-}
-
-static GL2PSprimitive *gl2psCreateSplitPrimitive2D(GL2PSprimitive *parent,
-                                                   GLshort numverts,
-                                                   GL2PSvertex *vertx)
-{
-  GLint i;
-  GL2PSprimitive *child = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive));
-
-  if(parent->type == GL2PS_IMAGEMAP){
-    child->type = GL2PS_IMAGEMAP;
-    child->data.image = parent->data.image;
-  }
-  else {
-    switch(numverts){
-    case 1 : child->type = GL2PS_POINT; break;
-    case 2 : child->type = GL2PS_LINE; break;
-    case 3 : child->type = GL2PS_TRIANGLE; break;
-    case 4 : child->type = GL2PS_QUADRANGLE; break;
-    default: child->type = GL2PS_NO_TYPE; break; /* FIXME */
-    }
-  }
-  child->boundary = 0; /* FIXME: not done! */
-  child->culled = parent->culled;
-  child->offset = parent->offset;
-  child->pattern = parent->pattern;
-  child->factor = parent->factor;
-  child->width = parent->width;
-  child->numverts = numverts;
-  child->verts = (GL2PSvertex*)gl2psMalloc(numverts * sizeof(GL2PSvertex));
-  for(i = 0; i < numverts; i++){
-    child->verts[i] = vertx[i];
-  }
-  return child;
-}
-
-static void gl2psSplitPrimitive2D(GL2PSprimitive *prim,
-                                  GL2PSplane plane,
-                                  GL2PSprimitive **front,
-                                  GL2PSprimitive **back)
-{
-  /* cur will hold the position of the current vertex
-     prev will hold the position of the previous vertex
-     prev0 will hold the position of the vertex number 0
-     v1 and v2 represent the current and previous vertices, respectively
-     flag is set if the current vertex should be checked against the plane */
-  GLint cur = -1, prev = -1, i, v1 = 0, v2 = 0, flag = 1, prev0 = -1;
-
-  /* list of vertices that will go in front and back primitive */
-  GL2PSvertex *front_list = NULL, *back_list = NULL;
-
-  /* number of vertices in front and back list */
-  GLshort front_count = 0, back_count = 0;
-
-  for(i = 0; i <= prim->numverts; i++){
-    v1 = i;
-    if(v1 == prim->numverts){
-      if(prim->numverts < 3) break;
-      v1 = 0;
-      v2 = prim->numverts - 1;
-      cur = prev0;
-    }
-    else if(flag){
-      cur = gl2psCheckPoint(prim->verts[v1].xyz, plane);
-      if(i == 0){
-        prev0 = cur;
-      }
-    }
-    if(((prev == -1) || (prev == cur) || (prev == 0) || (cur == 0)) &&
-       (i < prim->numverts)){
-      if(cur == GL2PS_POINT_INFRONT){
-        front_count++;
-        front_list = (GL2PSvertex*)gl2psRealloc(front_list,
-                                                sizeof(GL2PSvertex)*front_count);
-        front_list[front_count-1] = prim->verts[v1];
-      }
-      else if(cur == GL2PS_POINT_BACK){
-        back_count++;
-        back_list = (GL2PSvertex*)gl2psRealloc(back_list,
-                                               sizeof(GL2PSvertex)*back_count);
-        back_list[back_count-1] = prim->verts[v1];
-      }
-      else{
-        front_count++;
-        front_list = (GL2PSvertex*)gl2psRealloc(front_list,
-                                                sizeof(GL2PSvertex)*front_count);
-        front_list[front_count-1] = prim->verts[v1];
-        back_count++;
-        back_list = (GL2PSvertex*)gl2psRealloc(back_list,
-                                               sizeof(GL2PSvertex)*back_count);
-        back_list[back_count-1] = prim->verts[v1];
-      }
-      flag = 1;
-    }
-    else if((prev != cur) && (cur != 0) && (prev != 0)){
-      if(v1 != 0){
-        v2 = v1-1;
-        i--;
-      }
-      front_count++;
-      front_list = (GL2PSvertex*)gl2psRealloc(front_list,
-                                              sizeof(GL2PSvertex)*front_count);
-      gl2psCutEdge(&prim->verts[v2], &prim->verts[v1],
-                   plane, &front_list[front_count-1]);
-      back_count++;
-      back_list = (GL2PSvertex*)gl2psRealloc(back_list,
-                                             sizeof(GL2PSvertex)*back_count);
-      back_list[back_count-1] = front_list[front_count-1];
-      flag = 0;
-    }
-    prev = cur;
-  }
-  *front = gl2psCreateSplitPrimitive2D(prim, front_count, front_list);
-  *back = gl2psCreateSplitPrimitive2D(prim, back_count, back_list);
-  gl2psFree(front_list);
-  gl2psFree(back_list);
-}
-
-static GLint gl2psAddInBspImageTree(GL2PSprimitive *prim, GL2PSbsptree2d **tree)
-{
-  GLint ret = 0;
-  GL2PSprimitive *frontprim = NULL, *backprim = NULL;
-
-  /* FIXME: until we consider the actual extent of text strings and
-     pixmaps, never cull them. Otherwise the whole string/pixmap gets
-     culled as soon as the reference point is hidden */
-  if(prim->type == GL2PS_PIXMAP ||
-     prim->type == GL2PS_TEXT ||
-     prim->type == GL2PS_SPECIAL){
-    return 1;
-  }
-
-  if(*tree == NULL){
-    if((prim->type != GL2PS_IMAGEMAP) && (GL_FALSE == gl2ps->zerosurfacearea)){
-      gl2psAddPlanesInBspTreeImage(gl2ps->primitivetoadd, tree);
-    }
-    return 1;
-  }
-  else{
-    switch(gl2psCheckPrimitive(prim, (*tree)->plane)){
-    case GL2PS_IN_BACK_OF: return gl2psAddInBspImageTree(prim, &(*tree)->back);
-    case GL2PS_IN_FRONT_OF:
-      if((*tree)->front != NULL) return gl2psAddInBspImageTree(prim, &(*tree)->front);
-      else                       return 0;
-    case GL2PS_SPANNING:
-      gl2psSplitPrimitive2D(prim, (*tree)->plane, &frontprim, &backprim);
-      ret = gl2psAddInBspImageTree(backprim, &(*tree)->back);
-      if((*tree)->front != NULL){
-        if(gl2psAddInBspImageTree(frontprim, &(*tree)->front)){
-          ret = 1;
-        }
-      }
-      gl2psFree(frontprim->verts);
-      gl2psFree(frontprim);
-      gl2psFree(backprim->verts);
-      gl2psFree(backprim);
-      return ret;
-    case GL2PS_COINCIDENT:
-      if((*tree)->back != NULL){
-        gl2ps->zerosurfacearea = GL_TRUE;
-        ret = gl2psAddInBspImageTree(prim, &(*tree)->back);
-        gl2ps->zerosurfacearea = GL_FALSE;
-        if(ret) return ret;
-      }
-      if((*tree)->front != NULL){
-        gl2ps->zerosurfacearea = GL_TRUE;
-        ret = gl2psAddInBspImageTree(prim, &(*tree)->front);
-        gl2ps->zerosurfacearea = GL_FALSE;
-        if(ret) return ret;
-      }
-      if(prim->type == GL2PS_LINE) return 1;
-      else                         return 0;
-    }
-  }
-  return 0;
-}
-
-static void gl2psAddInImageTree(void *data)
-{
-  GL2PSprimitive *prim = *(GL2PSprimitive **)data;
-  gl2ps->primitivetoadd = prim;
-  if(prim->type == GL2PS_IMAGEMAP && prim->data.image->format == GL2PS_IMAGEMAP_VISIBLE){
-    prim->culled = 1;
-  }
-  else if(!gl2psAddInBspImageTree(prim, &gl2ps->imagetree)){
-    prim->culled = 1;
-  }
-  else if(prim->type == GL2PS_IMAGEMAP){
-    prim->data.image->format = GL2PS_IMAGEMAP_VISIBLE;
-  }
-}
-
-/* Boundary construction */
-
-static void gl2psAddBoundaryInList(GL2PSprimitive *prim, GL2PSlist *list)
-{
-  GL2PSprimitive *b;
-  GLshort i;
-  GL2PSxyz c;
-
-  c[0] = c[1] = c[2] = 0.0F;
-  for(i = 0; i < prim->numverts; i++){
-    c[0] += prim->verts[i].xyz[0];
-    c[1] += prim->verts[i].xyz[1];
-  }
-  c[0] /= prim->numverts;
-  c[1] /= prim->numverts;
-
-  for(i = 0; i < prim->numverts; i++){
-    if(prim->boundary & (GLint)pow(2., i)){
-      b = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive));
-      b->type = GL2PS_LINE;
-      b->offset = prim->offset;
-      b->pattern = prim->pattern;
-      b->factor = prim->factor;
-      b->culled = prim->culled;
-      b->width = prim->width;
-      b->boundary = 0;
-      b->numverts = 2;
-      b->verts = (GL2PSvertex*)gl2psMalloc(2 * sizeof(GL2PSvertex));
-
-#if 0 /* FIXME: need to work on boundary offset... */
-      v[0] = c[0] - prim->verts[i].xyz[0];
-      v[1] = c[1] - prim->verts[i].xyz[1];
-      v[2] = 0.0F;
-      norm = gl2psNorm(v);
-      v[0] /= norm;
-      v[1] /= norm;
-      b->verts[0].xyz[0] = prim->verts[i].xyz[0] +0.1*v[0];
-      b->verts[0].xyz[1] = prim->verts[i].xyz[1] +0.1*v[1];
-      b->verts[0].xyz[2] = prim->verts[i].xyz[2];
-      v[0] = c[0] - prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[0];
-      v[1] = c[1] - prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[1];
-      norm = gl2psNorm(v);
-      v[0] /= norm;
-      v[1] /= norm;
-      b->verts[1].xyz[0] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[0] +0.1*v[0];
-      b->verts[1].xyz[1] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[1] +0.1*v[1];
-      b->verts[1].xyz[2] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[2];
-#else
-      b->verts[0].xyz[0] = prim->verts[i].xyz[0];
-      b->verts[0].xyz[1] = prim->verts[i].xyz[1];
-      b->verts[0].xyz[2] = prim->verts[i].xyz[2];
-      b->verts[1].xyz[0] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[0];
-      b->verts[1].xyz[1] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[1];
-      b->verts[1].xyz[2] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[2];
-#endif
-
-      b->verts[0].rgba[0] = 0.0F;
-      b->verts[0].rgba[1] = 0.0F;
-      b->verts[0].rgba[2] = 0.0F;
-      b->verts[0].rgba[3] = 0.0F;
-      b->verts[1].rgba[0] = 0.0F;
-      b->verts[1].rgba[1] = 0.0F;
-      b->verts[1].rgba[2] = 0.0F;
-      b->verts[1].rgba[3] = 0.0F;
-      gl2psListAdd(list, &b);
-    }
-  }
-
-}
-
-static void gl2psBuildPolygonBoundary(GL2PSbsptree *tree)
-{
-  GLint i;
-  GL2PSprimitive *prim;
-
-  if(!tree) return;
-  gl2psBuildPolygonBoundary(tree->back);
-  for(i = 0; i < gl2psListNbr(tree->primitives); i++){
-    prim = *(GL2PSprimitive**)gl2psListPointer(tree->primitives, i);
-    if(prim->boundary) gl2psAddBoundaryInList(prim, tree->primitives);
-  }
-  gl2psBuildPolygonBoundary(tree->front);
-}
-
-/*********************************************************************
- *
- * Feedback buffer parser
- *
- *********************************************************************/
-
-static void gl2psAddPolyPrimitive(GLshort type, GLshort numverts,
-                                  GL2PSvertex *verts, GLint offset,
-                                  GLushort pattern, GLint factor,
-                                  GLfloat width, char boundary)
-{
-  GL2PSprimitive *prim;
-
-  prim = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive));
-  prim->type = type;
-  prim->numverts = numverts;
-  prim->verts = (GL2PSvertex*)gl2psMalloc(numverts * sizeof(GL2PSvertex));
-  memcpy(prim->verts, verts, numverts * sizeof(GL2PSvertex));
-  prim->boundary = boundary;
-  prim->offset = offset;
-  prim->pattern = pattern;
-  prim->factor = factor;
-  prim->width = width;
-  prim->culled = 0;
-
-  /* FIXME: here we should have an option to split stretched
-     tris/quads to enhance SIMPLE_SORT */
-
-  gl2psListAdd(gl2ps->primitives, &prim);
-}
-
-static GLint gl2psGetVertex(GL2PSvertex *v, GLfloat *p)
-{
-  GLint i;
-
-  v->xyz[0] = p[0];
-  v->xyz[1] = p[1];
-  v->xyz[2] = p[2];
-
-  if(gl2ps->colormode == GL_COLOR_INDEX && gl2ps->colorsize > 0){
-    i = (GLint)(p[3] + 0.5);
-    v->rgba[0] = gl2ps->colormap[i][0];
-    v->rgba[1] = gl2ps->colormap[i][1];
-    v->rgba[2] = gl2ps->colormap[i][2];
-    v->rgba[3] = gl2ps->colormap[i][3];
-    return 4;
-  }
-  else{
-    v->rgba[0] = p[3];
-    v->rgba[1] = p[4];
-    v->rgba[2] = p[5];
-    v->rgba[3] = p[6];
-    return 7;
-  }
-}
-
-static void gl2psParseFeedbackBuffer(GLint used)
-{
-  char flag;
-  GLushort pattern = 0;
-  GLboolean boundary;
-  GLint i, sizeoffloat, count, v, vtot, offset = 0, factor = 0, auxindex = 0;
-  GLfloat lwidth = 1.0F, psize = 1.0F;
-  GLfloat *current;
-  GL2PSvertex vertices[3];
-  GL2PSprimitive *prim;
-  GL2PSimagemap *node;
-
-  current = gl2ps->feedback;
-  boundary = gl2ps->boundary = GL_FALSE;
-
-  while(used > 0){
-
-    if(GL_TRUE == boundary) gl2ps->boundary = GL_TRUE;
-
-    switch((GLint)*current){
-    case GL_POINT_TOKEN :
-      current ++;
-      used --;
-      i = gl2psGetVertex(&vertices[0], current);
-      current += i;
-      used    -= i;
-      gl2psAddPolyPrimitive(GL2PS_POINT, 1, vertices, 0,
-                            pattern, factor, psize, 0);
-      break;
-    case GL_LINE_TOKEN :
-    case GL_LINE_RESET_TOKEN :
-      current ++;
-      used --;
-      i = gl2psGetVertex(&vertices[0], current);
-      current += i;
-      used    -= i;
-      i = gl2psGetVertex(&vertices[1], current);
-      current += i;
-      used    -= i;
-      gl2psAddPolyPrimitive(GL2PS_LINE, 2, vertices, 0,
-                            pattern, factor, lwidth, 0);
-      break;
-    case GL_POLYGON_TOKEN :
-      count = (GLint)current[1];
-      current += 2;
-      used -= 2;
-      v = vtot = 0;
-      while(count > 0 && used > 0){
-        i = gl2psGetVertex(&vertices[v], current);
-        gl2psAdaptVertexForBlending(&vertices[v]);
-        current += i;
-        used    -= i;
-        count --;
-        vtot++;
-        if(v == 2){
-          if(GL_TRUE == boundary){
-            if(!count && vtot == 2) flag = 1|2|4;
-            else if(!count) flag = 2|4;
-            else if(vtot == 2) flag = 1|2;
-            else flag = 2;
-          }
-          else
-            flag = 0;
-          gl2psAddPolyPrimitive(GL2PS_TRIANGLE, 3, vertices, offset,
-                                pattern, factor, 1, flag);
-          vertices[1] = vertices[2];
-        }
-        else
-          v ++;
-      }
-      break;
-    case GL_BITMAP_TOKEN :
-    case GL_DRAW_PIXEL_TOKEN :
-    case GL_COPY_PIXEL_TOKEN :
-      current ++;
-      used --;
-      i = gl2psGetVertex(&vertices[0], current);
-      current += i;
-      used    -= i;
-      break;
-    case GL_PASS_THROUGH_TOKEN :
-      switch((GLint)current[1]){
-      case GL2PS_BEGIN_OFFSET_TOKEN : offset = 1; break;
-      case GL2PS_END_OFFSET_TOKEN : offset = 0; break;
-      case GL2PS_BEGIN_BOUNDARY_TOKEN : boundary = GL_TRUE; break;
-      case GL2PS_END_BOUNDARY_TOKEN : boundary = GL_FALSE; break;
-      case GL2PS_END_STIPPLE_TOKEN : pattern = factor = 0; break;
-      case GL2PS_BEGIN_BLEND_TOKEN : gl2ps->blending = GL_TRUE; break;
-      case GL2PS_END_BLEND_TOKEN : gl2ps->blending = GL_FALSE; break;
-      case GL2PS_BEGIN_STIPPLE_TOKEN :
-        current += 2;
-        used -= 2;
-        pattern = (GLushort)current[1];
-        current += 2;
-        used -= 2;
-        factor = (GLint)current[1];
-        break;
-      case GL2PS_SRC_BLEND_TOKEN :
-        current += 2;
-        used -= 2;
-        gl2ps->blendfunc[0] = (GLint)current[1];
-        break;
-      case GL2PS_DST_BLEND_TOKEN :
-        current += 2;
-        used -= 2;
-        gl2ps->blendfunc[1] = (GLint)current[1];
-        break;
-      case GL2PS_POINT_SIZE_TOKEN :
-        current += 2;
-        used -= 2;
-        psize = current[1];
-        break;
-      case GL2PS_LINE_WIDTH_TOKEN :
-        current += 2;
-        used -= 2;
-        lwidth = current[1];
-        break;
-      case GL2PS_IMAGEMAP_TOKEN :
-        prim = (GL2PSprimitive *)gl2psMalloc(sizeof(GL2PSprimitive));
-        prim->type = GL2PS_IMAGEMAP;
-        prim->boundary = 0;
-        prim->numverts = 4;
-        prim->verts = (GL2PSvertex *)gl2psMalloc(4 * sizeof(GL2PSvertex));
-        prim->culled = 0;
-        prim->offset = 0;
-        prim->pattern = 0;
-        prim->factor = 0;
-        prim->width = 1;
-
-        node = (GL2PSimagemap*)gl2psMalloc(sizeof(GL2PSimagemap));
-        node->image = (GL2PSimage*)gl2psMalloc(sizeof(GL2PSimage));
-        node->image->type = 0;
-        node->image->format = 0;
-        node->image->zoom_x = 1.0F;
-        node->image->zoom_y = 1.0F;
-        node->next = NULL;
-
-        if(gl2ps->imagemap_head == NULL)
-          gl2ps->imagemap_head = node;
-        else
-          gl2ps->imagemap_tail->next = node;
-        gl2ps->imagemap_tail = node;
-        prim->data.image = node->image;
-
-        current += 2; used -= 2;
-        i = gl2psGetVertex(&prim->verts[0], &current[1]);
-        current += i; used -= i;
-
-        node->image->width = (GLint)current[2];
-        current += 2; used -= 2;
-        node->image->height = (GLint)current[2];
-        prim->verts[0].xyz[0] = prim->verts[0].xyz[0] - (int)(node->image->width / 2) + 0.5F;
-        prim->verts[0].xyz[1] = prim->verts[0].xyz[1] - (int)(node->image->height / 2) + 0.5F;
-        for(i = 1; i < 4; i++){
-          for(v = 0; v < 3; v++){
-            prim->verts[i].xyz[v] = prim->verts[0].xyz[v];
-            prim->verts[i].rgba[v] = prim->verts[0].rgba[v];
-          }
-          prim->verts[i].rgba[v] = prim->verts[0].rgba[v];
-        }
-        prim->verts[1].xyz[0] = prim->verts[1].xyz[0] + node->image->width;
-        prim->verts[2].xyz[0] = prim->verts[1].xyz[0];
-        prim->verts[2].xyz[1] = prim->verts[2].xyz[1] + node->image->height;
-        prim->verts[3].xyz[1] = prim->verts[2].xyz[1];
-
-        sizeoffloat = sizeof(GLfloat);
-        v = 2 * sizeoffloat;
-        vtot = node->image->height + node->image->height *
-          ((node->image->width - 1) / 8);
-        node->image->pixels = (GLfloat*)gl2psMalloc(v + vtot);
-        node->image->pixels[0] = prim->verts[0].xyz[0];
-        node->image->pixels[1] = prim->verts[0].xyz[1];
-
-        for(i = 0; i < vtot; i += sizeoffloat){
-          current += 2; used -= 2;
-          if((vtot - i) >= 4)
-            memcpy(&(((char*)(node->image->pixels))[i + v]), &(current[2]), sizeoffloat);
-          else
-            memcpy(&(((char*)(node->image->pixels))[i + v]), &(current[2]), vtot - i);
-        }
-        current++; used--;
-        gl2psListAdd(gl2ps->primitives, &prim);
-        break;
-      case GL2PS_DRAW_PIXELS_TOKEN :
-      case GL2PS_TEXT_TOKEN :
-        if(auxindex < gl2psListNbr(gl2ps->auxprimitives))
-          gl2psListAdd(gl2ps->primitives,
-                       gl2psListPointer(gl2ps->auxprimitives, auxindex++));
-        else
-          gl2psMsg(GL2PS_ERROR, "Wrong number of auxiliary tokens in buffer");
-        break;
-      }
-      current += 2;
-      used -= 2;
-      break;
-    default :
-      gl2psMsg(GL2PS_WARNING, "Unknown token in buffer");
-      current ++;
-      used --;
-      break;
-    }
-  }
-
-  gl2psListReset(gl2ps->auxprimitives);
-}
-
-/*********************************************************************
- *
- * PostScript routines
- *
- *********************************************************************/
-
-static void gl2psWriteByte(unsigned char byte)
-{
-  unsigned char h = byte / 16;
-  unsigned char l = byte % 16;
-  gl2psPrintf("%x%x", h, l);
-}
-
-static void gl2psPrintPostScriptPixmap(GLfloat x, GLfloat y, GL2PSimage *im)
-{
-  GLuint nbhex, nbyte, nrgb, nbits;
-  GLuint row, col, ibyte, icase;
-  GLfloat dr, dg, db, fgrey;
-  unsigned char red = 0, green = 0, blue = 0, b, grey;
-  GLuint width = (GLuint)im->width;
-  GLuint height = (GLuint)im->height;
-
-  /* FIXME: should we define an option for these? Or just keep the
-     8-bit per component case? */
-  int greyscale = 0; /* set to 1 to output greyscale image */
-  int nbit = 8; /* number of bits per color compoment (2, 4 or 8) */
-
-  if((width <= 0) || (height <= 0)) return;
-
-  gl2psPrintf("gsave\n");
-  gl2psPrintf("%.2f %.2f translate\n", x, y);
-  gl2psPrintf("%.2f %.2f scale\n", width * im->zoom_x, height * im->zoom_y);
-
-  if(greyscale){ /* greyscale */
-    gl2psPrintf("/picstr %d string def\n", width);
-    gl2psPrintf("%d %d %d\n", width, height, 8);
-    gl2psPrintf("[ %d 0 0 -%d 0 %d ]\n", width, height, height);
-    gl2psPrintf("{ currentfile picstr readhexstring pop }\n");
-    gl2psPrintf("image\n");
-    for(row = 0; row < height; row++){
-      for(col = 0; col < width; col++){
-        gl2psGetRGB(im, col, row, &dr, &dg, &db);
-        fgrey = (0.30F * dr + 0.59F * dg + 0.11F * db);
-        grey = (unsigned char)(255. * fgrey);
-        gl2psWriteByte(grey);
-      }
-      gl2psPrintf("\n");
-    }
-    nbhex = width * height * 2;
-    gl2psPrintf("%%%% nbhex digit          :%d\n", nbhex);
-  }
-  else if(nbit == 2){ /* color, 2 bits for r and g and b; rgbs following each other */
-    nrgb = width  * 3;
-    nbits = nrgb * nbit;
-    nbyte = nbits / 8;
-    if((nbyte * 8) != nbits) nbyte++;
-    gl2psPrintf("/rgbstr %d string def\n", nbyte);
-    gl2psPrintf("%d %d %d\n", width, height, nbit);
-    gl2psPrintf("[ %d 0 0 -%d 0 %d ]\n", width, height, height);
-    gl2psPrintf("{ currentfile rgbstr readhexstring pop }\n");
-    gl2psPrintf("false 3\n");
-    gl2psPrintf("colorimage\n");
-    for(row = 0; row < height; row++){
-      icase = 1;
-      col = 0;
-      b = 0;
-      for(ibyte = 0; ibyte < nbyte; ibyte++){
-        if(icase == 1) {
-          if(col < width) {
-            gl2psGetRGB(im, col, row, &dr, &dg, &db);
-          }
-          else {
-            dr = dg = db = 0;
-          }
-          col++;
-          red = (unsigned char)(3. * dr);
-          green = (unsigned char)(3. * dg);
-          blue = (unsigned char)(3. * db);
-          b = red;
-          b = (b<<2) + green;
-          b = (b<<2) + blue;
-          if(col < width) {
-            gl2psGetRGB(im, col, row, &dr, &dg, &db);
-          }
-          else {
-            dr = dg = db = 0;
-          }
-          col++;
-          red = (unsigned char)(3. * dr);
-          green = (unsigned char)(3. * dg);
-          blue = (unsigned char)(3. * db);
-          b = (b<<2) + red;
-          gl2psWriteByte(b);
-          b = 0;
-          icase++;
-        }
-        else if(icase == 2) {
-          b = green;
-          b = (b<<2) + blue;
-          if(col < width) {
-            gl2psGetRGB(im, col, row, &dr, &dg, &db);
-          }
-          else {
-            dr = dg = db = 0;
-          }
-          col++;
-          red = (unsigned char)(3. * dr);
-          green = (unsigned char)(3. * dg);
-          blue = (unsigned char)(3. * db);
-          b = (b<<2) + red;
-          b = (b<<2) + green;
-          gl2psWriteByte(b);
-          b = 0;
-          icase++;
-        }
-        else if(icase == 3) {
-          b = blue;
-          if(col < width) {
-            gl2psGetRGB(im, col, row, &dr, &dg, &db);
-          }
-          else {
-            dr = dg = db = 0;
-          }
-          col++;
-          red = (unsigned char)(3. * dr);
-          green = (unsigned char)(3. * dg);
-          blue = (unsigned char)(3. * db);
-          b = (b<<2) + red;
-          b = (b<<2) + green;
-          b = (b<<2) + blue;
-          gl2psWriteByte(b);
-          b = 0;
-          icase = 1;
-        }
-      }
-      gl2psPrintf("\n");
-    }
-  }
-  else if(nbit == 4){ /* color, 4 bits for r and g and b; rgbs following each other */
-    nrgb = width  * 3;
-    nbits = nrgb * nbit;
-    nbyte = nbits / 8;
-    if((nbyte * 8) != nbits) nbyte++;
-    gl2psPrintf("/rgbstr %d string def\n", nbyte);
-    gl2psPrintf("%d %d %d\n", width, height, nbit);
-    gl2psPrintf("[ %d 0 0 -%d 0 %d ]\n", width, height, height);
-    gl2psPrintf("{ currentfile rgbstr readhexstring pop }\n");
-    gl2psPrintf("false 3\n");
-    gl2psPrintf("colorimage\n");
-    for(row = 0; row < height; row++){
-      col = 0;
-      icase = 1;
-      for(ibyte = 0; ibyte < nbyte; ibyte++){
-        if(icase == 1) {
-          if(col < width) {
-            gl2psGetRGB(im, col, row, &dr, &dg, &db);
-          }
-          else {
-            dr = dg = db = 0;
-          }
-          col++;
-          red = (unsigned char)(15. * dr);
-          green = (unsigned char)(15. * dg);
-          gl2psPrintf("%x%x", red, green);
-          icase++;
-        }
-        else if(icase == 2) {
-          blue = (unsigned char)(15. * db);
-          if(col < width) {
-            gl2psGetRGB(im, col, row, &dr, &dg, &db);
-          }
-          else {
-            dr = dg = db = 0;
-          }
-          col++;
-          red = (unsigned char)(15. * dr);
-          gl2psPrintf("%x%x", blue, red);
-          icase++;
-        }
-        else if(icase == 3) {
-          green = (unsigned char)(15. * dg);
-          blue = (unsigned char)(15. * db);
-          gl2psPrintf("%x%x", green, blue);
-          icase = 1;
-        }
-      }
-      gl2psPrintf("\n");
-    }
-  }
-  else{ /* 8 bit for r and g and b */
-    nbyte = width * 3;
-    gl2psPrintf("/rgbstr %d string def\n", nbyte);
-    gl2psPrintf("%d %d %d\n", width, height, 8);
-    gl2psPrintf("[ %d 0 0 -%d 0 %d ]\n", width, height, height);
-    gl2psPrintf("{ currentfile rgbstr readhexstring pop }\n");
-    gl2psPrintf("false 3\n");
-    gl2psPrintf("colorimage\n");
-    for(row = 0; row < height; row++){
-      for(col = 0; col < width; col++){
-        gl2psGetRGB(im, col, row, &dr, &dg, &db);
-        red = (unsigned char)(255. * dr);
-        gl2psWriteByte(red);
-        green = (unsigned char)(255. * dg);
-        gl2psWriteByte(green);
-        blue = (unsigned char)(255. * db);
-        gl2psWriteByte(blue);
-      }
-      gl2psPrintf("\n");
-    }
-  }
-
-  gl2psPrintf("grestore\n");
-}
-
-static void gl2psPrintPostScriptImagemap(GLfloat x, GLfloat y,
-                                         GLsizei width, GLsizei height,
-                                         const unsigned char *imagemap){
-  int i, size;
-
-  if((width <= 0) || (height <= 0)) return;
-
-  size = height + height * (width - 1) / 8;
-
-  gl2psPrintf("gsave\n");
-  gl2psPrintf("%.2f %.2f translate\n", x, y);
-  gl2psPrintf("%d %d scale\n%d %d\ntrue\n", width, height,width, height);
-  gl2psPrintf("[ %d 0 0 -%d 0 %d ] {<", width, height);
-  for(i = 0; i < size; i++){
-    gl2psWriteByte(*imagemap);
-    imagemap++;
-  }
-  gl2psPrintf(">} imagemask\ngrestore\n");
-}
-
-static void gl2psPrintPostScriptHeader(void)
-{
-  time_t now;
-
-  /* Since compression is not part of the PostScript standard,
-     compressed PostScript files are just gzipped PostScript files
-     ("ps.gz" or "eps.gz") */
-  gl2psPrintGzipHeader();
-
-  time(&now);
-
-  if(gl2ps->format == GL2PS_PS){
-    gl2psPrintf("%%!PS-Adobe-3.0\n");
-  }
-  else{
-    gl2psPrintf("%%!PS-Adobe-3.0 EPSF-3.0\n");
-  }
-
-  gl2psPrintf("%%%%Title: %s\n"
-              "%%%%Creator: GL2PS %d.%d.%d%s, %s\n"
-              "%%%%For: %s\n"
-              "%%%%CreationDate: %s"
-              "%%%%LanguageLevel: 3\n"
-              "%%%%DocumentData: Clean7Bit\n"
-              "%%%%Pages: 1\n",
-              gl2ps->title, GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION,
-              GL2PS_PATCH_VERSION, GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT,
-              gl2ps->producer, ctime(&now));
-
-  if(gl2ps->format == GL2PS_PS){
-    gl2psPrintf("%%%%Orientation: %s\n"
-                "%%%%DocumentMedia: Default %d %d 0 () ()\n",
-                (gl2ps->options & GL2PS_LANDSCAPE) ? "Landscape" : "Portrait",
-                (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[3] :
-                (int)gl2ps->viewport[2],
-                (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[2] :
-                (int)gl2ps->viewport[3]);
-  }
-
-  gl2psPrintf("%%%%BoundingBox: %d %d %d %d\n"
-              "%%%%EndComments\n",
-              (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[1] :
-              (int)gl2ps->viewport[0],
-              (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[0] :
-              (int)gl2ps->viewport[1],
-              (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[3] :
-              (int)gl2ps->viewport[2],
-              (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[2] :
-              (int)gl2ps->viewport[3]);
-
-  /* RGB color: r g b C (replace C by G in output to change from rgb to gray)
-     Grayscale: r g b G
-     Font choose: size fontname FC
-     Text string: (string) x y size fontname S??
-     Rotated text string: (string) angle x y size fontname S??R
-     Point primitive: x y size P
-     Line width: width W
-     Line start: x y LS
-     Line joining last point: x y L
-     Line end: x y LE
-     Flat-shaded triangle: x3 y3 x2 y2 x1 y1 T
-     Smooth-shaded triangle: x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 ST */
-
-  gl2psPrintf("%%%%BeginProlog\n"
-              "/gl2psdict 64 dict def gl2psdict begin\n"
-              "0 setlinecap 0 setlinejoin\n"
-              "/tryPS3shading %s def %% set to false to force subdivision\n"
-              "/rThreshold %g def %% red component subdivision threshold\n"
-              "/gThreshold %g def %% green component subdivision threshold\n"
-              "/bThreshold %g def %% blue component subdivision threshold\n",
-              (gl2ps->options & GL2PS_NO_PS3_SHADING) ? "false" : "true",
-              gl2ps->threshold[0], gl2ps->threshold[1], gl2ps->threshold[2]);
-
-  gl2psPrintf("/BD { bind def } bind def\n"
-              "/C  { setrgbcolor } BD\n"
-              "/G  { 0.082 mul exch 0.6094 mul add exch 0.3086 mul add neg 1.0 add setgray } BD\n"
-              "/W  { setlinewidth } BD\n");
-
-  gl2psPrintf("/FC { findfont exch /SH exch def SH scalefont setfont } BD\n"
-              "/SW { dup stringwidth pop } BD\n"
-              "/S  { FC moveto show } BD\n"
-              "/SBC{ FC moveto SW -2 div 0 rmoveto show } BD\n"
-              "/SBR{ FC moveto SW neg 0 rmoveto show } BD\n"
-              "/SCL{ FC moveto 0 SH -2 div rmoveto show } BD\n"
-              "/SCC{ FC moveto SW -2 div SH -2 div rmoveto show } BD\n"
-              "/SCR{ FC moveto SW neg SH -2 div rmoveto show } BD\n"
-              "/STL{ FC moveto 0 SH neg rmoveto show } BD\n"
-              "/STC{ FC moveto SW -2 div SH neg rmoveto show } BD\n"
-              "/STR{ FC moveto SW neg SH neg rmoveto show } BD\n");
-
-  /* rotated text routines: same nameanem with R appended */
-
-  gl2psPrintf("/FCT { FC translate 0 0 } BD\n"
-              "/SR  { gsave FCT moveto rotate show grestore } BD\n"
-              "/SBCR{ gsave FCT moveto rotate SW -2 div 0 rmoveto show grestore } BD\n"
-              "/SBRR{ gsave FCT moveto rotate SW neg 0 rmoveto show grestore } BD\n"
-              "/SCLR{ gsave FCT moveto rotate 0 SH -2 div rmoveto show grestore} BD\n");
-  gl2psPrintf("/SCCR{ gsave FCT moveto rotate SW -2 div SH -2 div rmoveto show grestore} BD\n"
-              "/SCRR{ gsave FCT moveto rotate SW neg SH -2 div rmoveto show grestore} BD\n"
-              "/STLR{ gsave FCT moveto rotate 0 SH neg rmoveto show grestore } BD\n"
-              "/STCR{ gsave FCT moveto rotate SW -2 div SH neg rmoveto show grestore } BD\n"
-              "/STRR{ gsave FCT moveto rotate SW neg SH neg rmoveto show grestore } BD\n");
-
-  gl2psPrintf("/P  { newpath 0.0 360.0 arc closepath fill } BD\n"
-              "/LS { newpath moveto } BD\n"
-              "/L  { lineto } BD\n"
-              "/LE { lineto stroke } BD\n"
-              "/T  { newpath moveto lineto lineto closepath fill } BD\n");
-
-  /* Smooth-shaded triangle with PostScript level 3 shfill operator:
-        x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 STshfill */
-
-  gl2psPrintf("/STshfill {\n"
-              "      /b1 exch def /g1 exch def /r1 exch def /y1 exch def /x1 exch def\n"
-              "      /b2 exch def /g2 exch def /r2 exch def /y2 exch def /x2 exch def\n"
-              "      /b3 exch def /g3 exch def /r3 exch def /y3 exch def /x3 exch def\n"
-              "      gsave << /ShadingType 4 /ColorSpace [/DeviceRGB]\n"
-              "      /DataSource [ 0 x1 y1 r1 g1 b1 0 x2 y2 r2 g2 b2 0 x3 y3 r3 g3 b3 ] >>\n"
-              "      shfill grestore } BD\n");
-
-  /* Flat-shaded triangle with middle color:
-        x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 Tm */
-
-  gl2psPrintf(/* stack : x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 */
-              "/Tm { 3 -1 roll 8 -1 roll 13 -1 roll add add 3 div\n" /* r = (r1+r2+r3)/3 */
-              /* stack : x3 y3 g3 b3 x2 y2 g2 b2 x1 y1 g1 b1 r */
-              "      3 -1 roll 7 -1 roll 11 -1 roll add add 3 div\n" /* g = (g1+g2+g3)/3 */
-              /* stack : x3 y3 b3 x2 y2 b2 x1 y1 b1 r g b */
-              "      3 -1 roll 6 -1 roll 9 -1 roll add add 3 div" /* b = (b1+b2+b3)/3 */
-              /* stack : x3 y3 x2 y2 x1 y1 r g b */
-              " C T } BD\n");
-
-  /* Split triangle in four sub-triangles (at sides middle points) and call the
-     STnoshfill procedure on each, interpolating the colors in RGB space:
-        x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 STsplit
-     (in procedure comments key: (Vi) = xi yi ri gi bi) */
-
-  gl2psPrintf("/STsplit {\n"
-              "      4 index 15 index add 0.5 mul\n" /* x13 = (x1+x3)/2 */
-              "      4 index 15 index add 0.5 mul\n" /* y13 = (y1+y3)/2 */
-              "      4 index 15 index add 0.5 mul\n" /* r13 = (r1+r3)/2 */
-              "      4 index 15 index add 0.5 mul\n" /* g13 = (g1+g3)/2 */
-              "      4 index 15 index add 0.5 mul\n" /* b13 = (b1+b3)/2 */
-              "      5 copy 5 copy 25 15 roll\n");
-
-  /* at his point, stack = (V3) (V13) (V13) (V13) (V2) (V1) */
-
-  gl2psPrintf("      9 index 30 index add 0.5 mul\n" /* x23 = (x2+x3)/2 */
-              "      9 index 30 index add 0.5 mul\n" /* y23 = (y2+y3)/2 */
-              "      9 index 30 index add 0.5 mul\n" /* r23 = (r2+r3)/2 */
-              "      9 index 30 index add 0.5 mul\n" /* g23 = (g2+g3)/2 */
-              "      9 index 30 index add 0.5 mul\n" /* b23 = (b2+b3)/2 */
-              "      5 copy 5 copy 35 5 roll 25 5 roll 15 5 roll\n");
-
-  /* stack = (V3) (V13) (V23) (V13) (V23) (V13) (V23) (V2) (V1) */
-
-  gl2psPrintf("      4 index 10 index add 0.5 mul\n" /* x12 = (x1+x2)/2 */
-              "      4 index 10 index add 0.5 mul\n" /* y12 = (y1+y2)/2 */
-              "      4 index 10 index add 0.5 mul\n" /* r12 = (r1+r2)/2 */
-              "      4 index 10 index add 0.5 mul\n" /* g12 = (g1+g2)/2 */
-              "      4 index 10 index add 0.5 mul\n" /* b12 = (b1+b2)/2 */
-              "      5 copy 5 copy 40 5 roll 25 5 roll 15 5 roll 25 5 roll\n");
-
-  /* stack = (V3) (V13) (V23) (V13) (V12) (V23) (V13) (V1) (V12) (V23) (V12) (V2) */
-
-  gl2psPrintf("      STnoshfill STnoshfill STnoshfill STnoshfill } BD\n");
-
-  /* Gouraud shaded triangle using recursive subdivision until the difference
-     between corner colors does not exceed the thresholds:
-        x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 STnoshfill  */
-
-  gl2psPrintf("/STnoshfill {\n"
-              "      2 index 8 index sub abs rThreshold gt\n" /* |r1-r2|>rth */
-              "      { STsplit }\n"
-              "      { 1 index 7 index sub abs gThreshold gt\n" /* |g1-g2|>gth */
-              "        { STsplit }\n"
-              "        { dup 6 index sub abs bThreshold gt\n" /* |b1-b2|>bth */
-              "          { STsplit }\n"
-              "          { 2 index 13 index sub abs rThreshold gt\n" /* |r1-r3|>rht */
-              "            { STsplit }\n"
-              "            { 1 index 12 index sub abs gThreshold gt\n" /* |g1-g3|>gth */
-              "              { STsplit }\n"
-              "              { dup 11 index sub abs bThreshold gt\n" /* |b1-b3|>bth */
-              "                { STsplit }\n"
-              "                { 7 index 13 index sub abs rThreshold gt\n"); /* |r2-r3|>rht */
-  gl2psPrintf("                  { STsplit }\n"
-              "                  { 6 index 12 index sub abs gThreshold gt\n" /* |g2-g3|>gth */
-              "                    { STsplit }\n"
-              "                    { 5 index 11 index sub abs bThreshold gt\n" /* |b2-b3|>bth */
-              "                      { STsplit }\n"
-              "                      { Tm }\n" /* all colors sufficiently similar */
-              "                      ifelse }\n"
-              "                    ifelse }\n"
-              "                  ifelse }\n"
-              "                ifelse }\n"
-              "              ifelse }\n"
-              "            ifelse }\n"
-              "          ifelse }\n"
-              "        ifelse }\n"
-              "      ifelse } BD\n");
-
-  gl2psPrintf("tryPS3shading\n"
-              "{ /shfill where\n"
-              "  { /ST { STshfill } BD }\n"
-              "  { /ST { STnoshfill } BD }\n"
-              "  ifelse }\n"
-              "{ /ST { STnoshfill } BD }\n"
-              "ifelse\n");
-
-  gl2psPrintf("end\n"
-              "%%%%EndProlog\n"
-              "%%%%BeginSetup\n"
-              "/DeviceRGB setcolorspace\n"
-              "gl2psdict begin\n"
-              "%%%%EndSetup\n"
-              "%%%%Page: 1 1\n"
-              "%%%%BeginPageSetup\n");
-
-  if(gl2ps->options & GL2PS_LANDSCAPE){
-    gl2psPrintf("%d 0 translate 90 rotate\n",
-                (int)gl2ps->viewport[3]);
-  }
-
-  gl2psPrintf("%%%%EndPageSetup\n"
-              "mark\n"
-              "gsave\n"
-              "1.0 1.0 scale\n");
-
-  if(gl2ps->options & GL2PS_DRAW_BACKGROUND){
-    gl2psPrintf("%g %g %g C\n"
-                "newpath %d %d moveto %d %d lineto %d %d lineto %d %d lineto\n"
-                "closepath fill\n",
-                gl2ps->bgcolor[0], gl2ps->bgcolor[1], gl2ps->bgcolor[2],
-                (int)gl2ps->viewport[0], (int)gl2ps->viewport[1], (int)gl2ps->viewport[2],
-                (int)gl2ps->viewport[1], (int)gl2ps->viewport[2], (int)gl2ps->viewport[3],
-                (int)gl2ps->viewport[0], (int)gl2ps->viewport[3]);
-  }
-}
-
-static void gl2psPrintPostScriptColor(GL2PSrgba rgba)
-{
-  if(!gl2psSameColor(gl2ps->lastrgba, rgba)){
-    gl2psSetLastColor(rgba);
-    gl2psPrintf("%g %g %g C\n", rgba[0], rgba[1], rgba[2]);
-  }
-}
-
-static void gl2psResetPostScriptColor(void)
-{
-  gl2ps->lastrgba[0] = gl2ps->lastrgba[1] = gl2ps->lastrgba[2] = -1.;
-}
-
-static void gl2psEndPostScriptLine(void)
-{
-  int i;
-  if(gl2ps->lastvertex.rgba[0] >= 0.){
-    gl2psPrintf("%g %g LE\n", gl2ps->lastvertex.xyz[0], gl2ps->lastvertex.xyz[1]);
-    for(i = 0; i < 3; i++)
-      gl2ps->lastvertex.xyz[i] = -1.;
-    for(i = 0; i < 4; i++)
-      gl2ps->lastvertex.rgba[i] = -1.;
-  }
-}
-
-static void gl2psParseStipplePattern(GLushort pattern, GLint factor,
-                                     int *nb, int array[10])
-{
-  int i, n;
-  int on[8] = {0, 0, 0, 0, 0, 0, 0, 0};
-  int off[8] = {0, 0, 0, 0, 0, 0, 0, 0};
-  char tmp[16];
-
-  /* extract the 16 bits from the OpenGL stipple pattern */
-  for(n = 15; n >= 0; n--){
-    tmp[n] = (char)(pattern & 0x01);
-    pattern >>= 1;
-  }
-  /* compute the on/off pixel sequence */
-  n = 0;
-  for(i = 0; i < 8; i++){
-    while(n < 16 && !tmp[n]){ off[i]++; n++; }
-    while(n < 16 && tmp[n]){ on[i]++; n++; }
-    if(n >= 15){ i++; break; }
-  }
-
-  /* store the on/off array from right to left, starting with off
-     pixels. The PostScript specification allows for at most 11
-     elements in the on/off array, so we limit ourselves to 5 on/off
-     couples (our longest possible array is thus [on4 off4 on3 off3
-     on2 off2 on1 off1 on0 off0]) */
-  *nb = 0;
-  for(n = i - 1; n >= 0; n--){
-    array[(*nb)++] = factor * on[n];
-    array[(*nb)++] = factor * off[n];
-    if(*nb == 10) break;
-  }
-}
-
-static int gl2psPrintPostScriptDash(GLushort pattern, GLint factor, const char *str)
-{
-  int len = 0, i, n, array[10];
-
-  if(pattern == gl2ps->lastpattern && factor == gl2ps->lastfactor)
-    return 0;
-
-  gl2ps->lastpattern = pattern;
-  gl2ps->lastfactor = factor;
-
-  if(!pattern || !factor){
-    /* solid line */
-    len += gl2psPrintf("[] 0 %s\n", str);
-  }
-  else{
-    gl2psParseStipplePattern(pattern, factor, &n, array);
-    len += gl2psPrintf("[");
-    for(i = 0; i < n; i++){
-      if(i) len += gl2psPrintf(" ");
-      len += gl2psPrintf("%d", array[i]);
-    }
-    len += gl2psPrintf("] 0 %s\n", str);
-  }
-
-  return len;
-}
-
-static void gl2psPrintPostScriptPrimitive(void *data)
-{
-  int newline;
-  GL2PSprimitive *prim;
-
-  prim = *(GL2PSprimitive**)data;
-
-  if((gl2ps->options & GL2PS_OCCLUSION_CULL) && prim->culled) return;
-
-  /* Every effort is made to draw lines as connected segments (i.e.,
-     using a single PostScript path): this is the only way to get nice
-     line joins and to not restart the stippling for every line
-     segment. So if the primitive to print is not a line we must first
-     finish the current line (if any): */
-  if(prim->type != GL2PS_LINE) gl2psEndPostScriptLine();
-
-  switch(prim->type){
-  case GL2PS_POINT :
-    gl2psPrintPostScriptColor(prim->verts[0].rgba);
-    gl2psPrintf("%g %g %g P\n",
-                prim->verts[0].xyz[0], prim->verts[0].xyz[1], 0.5 * prim->width);
-    break;
-  case GL2PS_LINE :
-    if(!gl2psSamePosition(gl2ps->lastvertex.xyz, prim->verts[0].xyz) ||
-       !gl2psSameColor(gl2ps->lastrgba, prim->verts[0].rgba) ||
-       gl2ps->lastlinewidth != prim->width ||
-       gl2ps->lastpattern != prim->pattern ||
-       gl2ps->lastfactor != prim->factor){
-      /* End the current line if the new segment does not start where
-         the last one ended, or if the color, the width or the
-         stippling have changed (multi-stroking lines with changing
-         colors is necessary until we use /shfill for lines;
-         unfortunately this means that at the moment we can screw up
-         line stippling for smooth-shaded lines) */
-      gl2psEndPostScriptLine();
-      newline = 1;
-    }
-    else{
-      newline = 0;
-    }
-    if(gl2ps->lastlinewidth != prim->width){
-      gl2ps->lastlinewidth = prim->width;
-      gl2psPrintf("%g W\n", gl2ps->lastlinewidth);
-    }
-    gl2psPrintPostScriptDash(prim->pattern, prim->factor, "setdash");
-    gl2psPrintPostScriptColor(prim->verts[0].rgba);
-    gl2psPrintf("%g %g %s\n", prim->verts[0].xyz[0], prim->verts[0].xyz[1],
-                newline ? "LS" : "L");
-    gl2ps->lastvertex = prim->verts[1];
-    break;
-  case GL2PS_TRIANGLE :
-    if(!gl2psVertsSameColor(prim)){
-      gl2psResetPostScriptColor();
-      gl2psPrintf("%g %g %g %g %g %g %g %g %g %g %g %g %g %g %g ST\n",
-                  prim->verts[2].xyz[0], prim->verts[2].xyz[1],
-                  prim->verts[2].rgba[0], prim->verts[2].rgba[1],
-                  prim->verts[2].rgba[2], prim->verts[1].xyz[0],
-                  prim->verts[1].xyz[1], prim->verts[1].rgba[0],
-                  prim->verts[1].rgba[1], prim->verts[1].rgba[2],
-                  prim->verts[0].xyz[0], prim->verts[0].xyz[1],
-                  prim->verts[0].rgba[0], prim->verts[0].rgba[1],
-                  prim->verts[0].rgba[2]);
-    }
-    else{
-      gl2psPrintPostScriptColor(prim->verts[0].rgba);
-      gl2psPrintf("%g %g %g %g %g %g T\n",
-                  prim->verts[2].xyz[0], prim->verts[2].xyz[1],
-                  prim->verts[1].xyz[0], prim->verts[1].xyz[1],
-                  prim->verts[0].xyz[0], prim->verts[0].xyz[1]);
-    }
-    break;
-  case GL2PS_QUADRANGLE :
-    gl2psMsg(GL2PS_WARNING, "There should not be any quad left to print");
-    break;
-  case GL2PS_PIXMAP :
-    gl2psPrintPostScriptPixmap(prim->verts[0].xyz[0], prim->verts[0].xyz[1],
-                               prim->data.image);
-    break;
-  case GL2PS_IMAGEMAP :
-    if(prim->data.image->type != GL2PS_IMAGEMAP_WRITTEN){
-      gl2psPrintPostScriptColor(prim->verts[0].rgba);
-      gl2psPrintPostScriptImagemap(prim->data.image->pixels[0],
-                                   prim->data.image->pixels[1],
-                                   prim->data.image->width, prim->data.image->height,
-                                   (const unsigned char*)(&(prim->data.image->pixels[2])));
-      prim->data.image->type = GL2PS_IMAGEMAP_WRITTEN;
-    }
-    break;
-  case GL2PS_TEXT :
-    gl2psPrintPostScriptColor(prim->verts[0].rgba);
-    gl2psPrintf("(%s) ", prim->data.text->str);
-    if(prim->data.text->angle)
-      gl2psPrintf("%g ", prim->data.text->angle);
-    gl2psPrintf("%g %g %d /%s ",
-                prim->verts[0].xyz[0], prim->verts[0].xyz[1],
-                prim->data.text->fontsize, prim->data.text->fontname);
-    switch(prim->data.text->alignment){
-    case GL2PS_TEXT_C:
-      gl2psPrintf(prim->data.text->angle ? "SCCR\n" : "SCC\n");
-      break;
-    case GL2PS_TEXT_CL:
-      gl2psPrintf(prim->data.text->angle ? "SCLR\n" : "SCL\n");
-      break;
-    case GL2PS_TEXT_CR:
-      gl2psPrintf(prim->data.text->angle ? "SCRR\n" : "SCR\n");
-      break;
-    case GL2PS_TEXT_B:
-      gl2psPrintf(prim->data.text->angle ? "SBCR\n" : "SBC\n");
-      break;
-    case GL2PS_TEXT_BR:
-      gl2psPrintf(prim->data.text->angle ? "SBRR\n" : "SBR\n");
-      break;
-    case GL2PS_TEXT_T:
-      gl2psPrintf(prim->data.text->angle ? "STCR\n" : "STC\n");
-      break;
-    case GL2PS_TEXT_TL:
-      gl2psPrintf(prim->data.text->angle ? "STLR\n" : "STL\n");
-      break;
-    case GL2PS_TEXT_TR:
-      gl2psPrintf(prim->data.text->angle ? "STRR\n" : "STR\n");
-      break;
-    case GL2PS_TEXT_BL:
-    default:
-      gl2psPrintf(prim->data.text->angle ? "SR\n" : "S\n");
-      break;
-    }
-    break;
-  case GL2PS_SPECIAL :
-    /* alignment contains the format for which the special output text
-       is intended */
-    if(prim->data.text->alignment == GL2PS_PS ||
-       prim->data.text->alignment == GL2PS_EPS)
-      gl2psPrintf("%s\n", prim->data.text->str);
-    break;
-  default :
-    break;
-  }
-}
-
-static void gl2psPrintPostScriptFooter(void)
-{
-  gl2psPrintf("grestore\n"
-              "showpage\n"
-              "cleartomark\n"
-              "%%%%PageTrailer\n"
-              "%%%%Trailer\n"
-              "end\n"
-              "%%%%EOF\n");
-
-  gl2psPrintGzipFooter();
-}
-
-static void gl2psPrintPostScriptBeginViewport(GLint viewport[4])
-{
-  GLint index;
-  GLfloat rgba[4];
-  int x = viewport[0], y = viewport[1], w = viewport[2], h = viewport[3];
-
-  glRenderMode(GL_FEEDBACK);
-
-  if(gl2ps->header){
-    gl2psPrintPostScriptHeader();
-    gl2ps->header = GL_FALSE;
-  }
-
-  gl2psPrintf("gsave\n"
-              "1.0 1.0 scale\n");
-
-  if(gl2ps->options & GL2PS_DRAW_BACKGROUND){
-    if(gl2ps->colormode == GL_RGBA || gl2ps->colorsize == 0){
-      glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba);
-    }
-    else{
-      glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index);
-      rgba[0] = gl2ps->colormap[index][0];
-      rgba[1] = gl2ps->colormap[index][1];
-      rgba[2] = gl2ps->colormap[index][2];
-      rgba[3] = 1.0F;
-    }
-    gl2psPrintf("%g %g %g C\n"
-                "newpath %d %d moveto %d %d lineto %d %d lineto %d %d lineto\n"
-                "closepath fill\n",
-                rgba[0], rgba[1], rgba[2],
-                x, y, x+w, y, x+w, y+h, x, y+h);
-  }
-
-  gl2psPrintf("newpath %d %d moveto %d %d lineto %d %d lineto %d %d lineto\n"
-              "closepath clip\n",
-              x, y, x+w, y, x+w, y+h, x, y+h);
-
-}
-
-static GLint gl2psPrintPostScriptEndViewport(void)
-{
-  GLint res;
-
-  res = gl2psPrintPrimitives();
-  gl2psPrintf("grestore\n");
-  return res;
-}
-
-static void gl2psPrintPostScriptFinalPrimitive(void)
-{
-  /* End any remaining line, if any */
-  gl2psEndPostScriptLine();
-}
-
-/* definition of the PostScript and Encapsulated PostScript backends */
-
-static GL2PSbackend gl2psPS = {
-  gl2psPrintPostScriptHeader,
-  gl2psPrintPostScriptFooter,
-  gl2psPrintPostScriptBeginViewport,
-  gl2psPrintPostScriptEndViewport,
-  gl2psPrintPostScriptPrimitive,
-  gl2psPrintPostScriptFinalPrimitive,
-  "ps",
-  "Postscript"
-};
-
-static GL2PSbackend gl2psEPS = {
-  gl2psPrintPostScriptHeader,
-  gl2psPrintPostScriptFooter,
-  gl2psPrintPostScriptBeginViewport,
-  gl2psPrintPostScriptEndViewport,
-  gl2psPrintPostScriptPrimitive,
-  gl2psPrintPostScriptFinalPrimitive,
-  "eps",
-  "Encapsulated Postscript"
-};
-
-/*********************************************************************
- *
- * LaTeX routines
- *
- *********************************************************************/
-
-static void gl2psPrintTeXHeader(void)
-{
-  char name[256];
-  time_t now;
-  int i;
-
-  if(gl2ps->filename && strlen(gl2ps->filename) < 256){
-    for(i = (int)strlen(gl2ps->filename) - 1; i >= 0; i--){
-      if(gl2ps->filename[i] == '.'){
-        strncpy(name, gl2ps->filename, i);
-        name[i] = '\0';
-        break;
-      }
-    }
-    if(i <= 0) strcpy(name, gl2ps->filename);
-  }
-  else{
-    strcpy(name, "untitled");
-  }
-
-  time(&now);
-
-  fprintf(gl2ps->stream,
-          "%% Title: %s\n"
-          "%% Creator: GL2PS %d.%d.%d%s, %s\n"
-          "%% For: %s\n"
-          "%% CreationDate: %s",
-          gl2ps->title, GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION,
-          GL2PS_PATCH_VERSION, GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT,
-          gl2ps->producer, ctime(&now));
-
-  fprintf(gl2ps->stream,
-          "\\setlength{\\unitlength}{1pt}\n"
-          "\\begin{picture}(0,0)\n"
-          "\\includegraphics{%s}\n"
-          "\\end{picture}%%\n"
-          "%s\\begin{picture}(%d,%d)(0,0)\n",
-          name, (gl2ps->options & GL2PS_LANDSCAPE) ? "\\rotatebox{90}{" : "",
-          (int)gl2ps->viewport[2], (int)gl2ps->viewport[3]);
-}
-
-static void gl2psPrintTeXPrimitive(void *data)
-{
-  GL2PSprimitive *prim;
-
-  prim = *(GL2PSprimitive**)data;
-
-  switch(prim->type){
-  case GL2PS_TEXT :
-    fprintf(gl2ps->stream, "\\fontsize{%d}{0}\n\\selectfont",
-            prim->data.text->fontsize);
-    fprintf(gl2ps->stream, "\\put(%g,%g)",
-            prim->verts[0].xyz[0], prim->verts[0].xyz[1]);
-    if(prim->data.text->angle)
-      fprintf(gl2ps->stream, "{\\rotatebox{%g}", prim->data.text->angle);
-    fprintf(gl2ps->stream, "{\\makebox(0,0)");
-    switch(prim->data.text->alignment){
-    case GL2PS_TEXT_C:
-      fprintf(gl2ps->stream, "{");
-      break;
-    case GL2PS_TEXT_CL:
-      fprintf(gl2ps->stream, "[l]{");
-      break;
-    case GL2PS_TEXT_CR:
-      fprintf(gl2ps->stream, "[r]{");
-      break;
-    case GL2PS_TEXT_B:
-      fprintf(gl2ps->stream, "[b]{");
-      break;
-    case GL2PS_TEXT_BR:
-      fprintf(gl2ps->stream, "[br]{");
-      break;
-    case GL2PS_TEXT_T:
-      fprintf(gl2ps->stream, "[t]{");
-      break;
-    case GL2PS_TEXT_TL:
-      fprintf(gl2ps->stream, "[tl]{");
-      break;
-    case GL2PS_TEXT_TR:
-      fprintf(gl2ps->stream, "[tr]{");
-      break;
-    case GL2PS_TEXT_BL:
-    default:
-      fprintf(gl2ps->stream, "[bl]{");
-      break;
-    }
-    fprintf(gl2ps->stream, "\\textcolor[rgb]{%g,%g,%g}{{%s}}",
-            prim->verts[0].rgba[0], prim->verts[0].rgba[1], prim->verts[0].rgba[2],
-            prim->data.text->str);
-    if(prim->data.text->angle)
-      fprintf(gl2ps->stream, "}");
-    fprintf(gl2ps->stream, "}}\n");
-    break;
-  case GL2PS_SPECIAL :
-    /* alignment contains the format for which the special output text
-       is intended */
-    if (prim->data.text->alignment == GL2PS_TEX)
-      fprintf(gl2ps->stream, "%s\n", prim->data.text->str);
-    break;
-  default :
-    break;
-  }
-}
-
-static void gl2psPrintTeXFooter(void)
-{
-  fprintf(gl2ps->stream, "\\end{picture}%s\n",
-          (gl2ps->options & GL2PS_LANDSCAPE) ? "}" : "");
-}
-
-static void gl2psPrintTeXBeginViewport(GLint viewport[4])
-{
-  (void) viewport;  /* not used */
-  glRenderMode(GL_FEEDBACK);
-
-  if(gl2ps->header){
-    gl2psPrintTeXHeader();
-    gl2ps->header = GL_FALSE;
-  }
-}
-
-static GLint gl2psPrintTeXEndViewport(void)
-{
-  return gl2psPrintPrimitives();
-}
-
-static void gl2psPrintTeXFinalPrimitive(void)
-{
-}
-
-/* definition of the LaTeX backend */
-
-static GL2PSbackend gl2psTEX = {
-  gl2psPrintTeXHeader,
-  gl2psPrintTeXFooter,
-  gl2psPrintTeXBeginViewport,
-  gl2psPrintTeXEndViewport,
-  gl2psPrintTeXPrimitive,
-  gl2psPrintTeXFinalPrimitive,
-  "tex",
-  "LaTeX text"
-};
-
-/*********************************************************************
- *
- * PDF routines
- *
- *********************************************************************/
-
-static int gl2psPrintPDFCompressorType(void)
-{
-#if defined(GL2PS_HAVE_ZLIB)
-  if(gl2ps->options & GL2PS_COMPRESS){
-    return fprintf(gl2ps->stream, "/Filter [/FlateDecode]\n");
-  }
-#endif
-  return 0;
-}
-
-static int gl2psPrintPDFStrokeColor(GL2PSrgba rgba)
-{
-  int i, offs = 0;
-
-  gl2psSetLastColor(rgba);
-  for(i = 0; i < 3; ++i){
-    if(GL2PS_ZERO(rgba[i]))
-      offs += gl2psPrintf("%.0f ", 0.);
-    else if(rgba[i] < 1e-4 || rgba[i] > 1e6) /* avoid %e formatting */
-      offs += gl2psPrintf("%f ", rgba[i]);
-    else
-      offs += gl2psPrintf("%g ", rgba[i]);
-  }
-  offs += gl2psPrintf("RG\n");
-  return offs;
-}
-
-static int gl2psPrintPDFFillColor(GL2PSrgba rgba)
-{
-  int i, offs = 0;
-
-  for(i = 0; i < 3; ++i){
-    if(GL2PS_ZERO(rgba[i]))
-      offs += gl2psPrintf("%.0f ", 0.);
-    else if(rgba[i] < 1e-4 || rgba[i] > 1e6) /* avoid %e formatting */
-      offs += gl2psPrintf("%f ", rgba[i]);
-    else
-      offs += gl2psPrintf("%g ", rgba[i]);
-  }
-  offs += gl2psPrintf("rg\n");
-  return offs;
-}
-
-static int gl2psPrintPDFLineWidth(GLfloat lw)
-{
-  if(GL2PS_ZERO(lw))
-    return gl2psPrintf("%.0f w\n", 0.);
-  else if(lw < 1e-4 || lw > 1e6) /* avoid %e formatting */
-    return gl2psPrintf("%f w\n", lw);
-  else
-    return gl2psPrintf("%g w\n", lw);
-}
-
-static void gl2psPutPDFText(GL2PSstring *text, int cnt, GLfloat x, GLfloat y)
-{
-  GLfloat rad, crad, srad;
-
-  if(text->angle == 0.0F){
-    gl2ps->streamlength += gl2psPrintf
-      ("BT\n"
-       "/F%d %d Tf\n"
-       "%f %f Td\n"
-       "(%s) Tj\n"
-       "ET\n",
-       cnt, text->fontsize, x, y, text->str);
-  }
-  else{
-    rad = (GLfloat)(M_PI * text->angle / 180.0F);
-    srad = (GLfloat)sin(rad);
-    crad = (GLfloat)cos(rad);
-    gl2ps->streamlength += gl2psPrintf
-      ("BT\n"
-       "/F%d %d Tf\n"
-       "%f %f %f %f %f %f Tm\n"
-       "(%s) Tj\n"
-       "ET\n",
-       cnt, text->fontsize, crad, srad, -srad, crad, x, y, text->str);
-  }
-}
-
-static void gl2psPutPDFImage(GL2PSimage *image, int cnt, GLfloat x, GLfloat y)
-{
-  gl2ps->streamlength += gl2psPrintf
-    ("q\n"
-     "%d 0 0 %d %f %f cm\n"
-     "/Im%d Do\n"
-     "Q\n",
-     (int)image->width, (int)image->height, x, y, cnt);
-}
-
-static void gl2psPDFstacksInit(void)
-{
-  gl2ps->objects_stack = 7 /* FIXED_XREF_ENTRIES */ + 1;
-  gl2ps->extgs_stack = 0;
-  gl2ps->font_stack = 0;
-  gl2ps->im_stack = 0;
-  gl2ps->trgroupobjects_stack = 0;
-  gl2ps->shader_stack = 0;
-  gl2ps->mshader_stack = 0;
-}
-
-static void gl2psPDFgroupObjectInit(GL2PSpdfgroup *gro)
-{
-  if(!gro)
-    return;
-
-  gro->ptrlist = NULL;
-  gro->fontno = gro->gsno = gro->imno = gro->maskshno = gro->shno
-    = gro->trgroupno = gro->fontobjno = gro->imobjno = gro->shobjno
-    = gro->maskshobjno = gro->gsobjno = gro->trgroupobjno = -1;
-}
-
-/* Build up group objects and assign name and object numbers */
-
-static void gl2psPDFgroupListInit(void)
-{
-  int i;
-  GL2PSprimitive *p = NULL;
-  GL2PSpdfgroup gro;
-  int lasttype = GL2PS_NO_TYPE;
-  GL2PSrgba lastrgba = {-1.0F, -1.0F, -1.0F, -1.0F};
-  GLushort lastpattern = 0;
-  GLint lastfactor = 0;
-  GLfloat lastwidth = 1;
-  GL2PStriangle lastt, tmpt;
-  int lastTriangleWasNotSimpleWithSameColor = 0;
-
-  if(!gl2ps->pdfprimlist)
-    return;
-
-  gl2ps->pdfgrouplist = gl2psListCreate(500, 500, sizeof(GL2PSpdfgroup));
-  gl2psInitTriangle(&lastt);
-
-  for(i = 0; i < gl2psListNbr(gl2ps->pdfprimlist); ++i){
-    p = *(GL2PSprimitive**)gl2psListPointer(gl2ps->pdfprimlist, i);
-    switch(p->type){
-    case GL2PS_PIXMAP:
-      gl2psPDFgroupObjectInit(&gro);
-      gro.ptrlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*));
-      gro.imno = gl2ps->im_stack++;
-      gl2psListAdd(gro.ptrlist, &p);
-      gl2psListAdd(gl2ps->pdfgrouplist, &gro);
-      break;
-    case GL2PS_TEXT:
-      gl2psPDFgroupObjectInit(&gro);
-      gro.ptrlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*));
-      gro.fontno = gl2ps->font_stack++;
-      gl2psListAdd(gro.ptrlist, &p);
-      gl2psListAdd(gl2ps->pdfgrouplist, &gro);
-      break;
-    case GL2PS_LINE:
-      if(lasttype != p->type || lastwidth != p->width ||
-         lastpattern != p->pattern || lastfactor != p->factor ||
-         !gl2psSameColor(p->verts[0].rgba, lastrgba)){
-        gl2psPDFgroupObjectInit(&gro);
-        gro.ptrlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*));
-        gl2psListAdd(gro.ptrlist, &p);
-        gl2psListAdd(gl2ps->pdfgrouplist, &gro);
-      }
-      else{
-        gl2psListAdd(gro.ptrlist, &p);
-      }
-      lastpattern = p->pattern;
-      lastfactor = p->factor;
-      lastwidth = p->width;
-      lastrgba[0] = p->verts[0].rgba[0];
-      lastrgba[1] = p->verts[0].rgba[1];
-      lastrgba[2] = p->verts[0].rgba[2];
-      break;
-    case GL2PS_POINT:
-      if(lasttype != p->type || lastwidth != p->width ||
-         !gl2psSameColor(p->verts[0].rgba, lastrgba)){
-        gl2psPDFgroupObjectInit(&gro);
-        gro.ptrlist = gl2psListCreate(1,2,sizeof(GL2PSprimitive*));
-        gl2psListAdd(gro.ptrlist, &p);
-        gl2psListAdd(gl2ps->pdfgrouplist, &gro);
-      }
-      else{
-        gl2psListAdd(gro.ptrlist, &p);
-      }
-      lastwidth = p->width;
-      lastrgba[0] = p->verts[0].rgba[0];
-      lastrgba[1] = p->verts[0].rgba[1];
-      lastrgba[2] = p->verts[0].rgba[2];
-      break;
-    case GL2PS_TRIANGLE:
-      gl2psFillTriangleFromPrimitive(&tmpt, p, GL_TRUE);
-      lastTriangleWasNotSimpleWithSameColor =
-        !(tmpt.prop & T_CONST_COLOR && tmpt.prop & T_ALPHA_1) ||
-        !gl2psSameColor(tmpt.vertex[0].rgba, lastt.vertex[0].rgba);
-      if(lasttype == p->type && tmpt.prop == lastt.prop &&
-         lastTriangleWasNotSimpleWithSameColor){
-        /* TODO Check here for last alpha */
-        gl2psListAdd(gro.ptrlist, &p);
-      }
-      else{
-        gl2psPDFgroupObjectInit(&gro);
-        gro.ptrlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*));
-        gl2psListAdd(gro.ptrlist, &p);
-        gl2psListAdd(gl2ps->pdfgrouplist, &gro);
-      }
-      lastt = tmpt;
-      break;
-    default:
-      break;
-    }
-    lasttype = p->type;
-  }
-}
-
-static void gl2psSortOutTrianglePDFgroup(GL2PSpdfgroup *gro)
-{
-  GL2PStriangle t;
-  GL2PSprimitive *prim = NULL;
-
-  if(!gro)
-    return;
-
-  if(!gl2psListNbr(gro->ptrlist))
-    return;
-
-  prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, 0);
-
-  if(prim->type != GL2PS_TRIANGLE)
-    return;
-
-  gl2psFillTriangleFromPrimitive(&t, prim, GL_TRUE);
-
-  if(t.prop & T_CONST_COLOR && t.prop & T_ALPHA_LESS_1){
-    gro->gsno = gl2ps->extgs_stack++;
-    gro->gsobjno = gl2ps->objects_stack ++;
-  }
-  else if(t.prop & T_CONST_COLOR && t.prop & T_VAR_ALPHA){
-    gro->gsno = gl2ps->extgs_stack++;
-    gro->gsobjno = gl2ps->objects_stack++;
-    gro->trgroupno = gl2ps->trgroupobjects_stack++;
-    gro->trgroupobjno = gl2ps->objects_stack++;
-    gro->maskshno = gl2ps->mshader_stack++;
-    gro->maskshobjno = gl2ps->objects_stack++;
-  }
-  else if(t.prop & T_VAR_COLOR && t.prop & T_ALPHA_1){
-    gro->shno = gl2ps->shader_stack++;
-    gro->shobjno = gl2ps->objects_stack++;
-  }
-  else if(t.prop & T_VAR_COLOR && t.prop & T_ALPHA_LESS_1){
-    gro->gsno = gl2ps->extgs_stack++;
-    gro->gsobjno = gl2ps->objects_stack++;
-    gro->shno = gl2ps->shader_stack++;
-    gro->shobjno = gl2ps->objects_stack++;
-  }
-  else if(t.prop & T_VAR_COLOR && t.prop & T_VAR_ALPHA){
-    gro->gsno = gl2ps->extgs_stack++;
-    gro->gsobjno = gl2ps->objects_stack++;
-    gro->shno = gl2ps->shader_stack++;
-    gro->shobjno = gl2ps->objects_stack++;
-    gro->trgroupno = gl2ps->trgroupobjects_stack++;
-    gro->trgroupobjno = gl2ps->objects_stack++;
-    gro->maskshno = gl2ps->mshader_stack++;
-    gro->maskshobjno = gl2ps->objects_stack++;
-  }
-}
-
-/* Main stream data */
-
-static void gl2psPDFgroupListWriteMainStream(void)
-{
-  int i, j, lastel;
-  GL2PSprimitive *prim = NULL, *prev = NULL;
-  GL2PSpdfgroup *gro;
-  GL2PStriangle t;
-
-  if(!gl2ps->pdfgrouplist)
-    return;
-
-  for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){
-    gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i);
-
-    lastel = gl2psListNbr(gro->ptrlist) - 1;
-    if(lastel < 0)
-      continue;
-
-    prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, 0);
-
-    switch(prim->type){
-    case GL2PS_POINT:
-      gl2ps->streamlength += gl2psPrintf("1 J\n");
-      gl2ps->streamlength += gl2psPrintPDFLineWidth(prim->width);
-      gl2ps->streamlength += gl2psPrintPDFStrokeColor(prim->verts[0].rgba);
-      for(j = 0; j <= lastel; ++j){
-        prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j);
-        gl2ps->streamlength +=
-          gl2psPrintf("%f %f m %f %f l\n",
-                      prim->verts[0].xyz[0], prim->verts[0].xyz[1],
-                      prim->verts[0].xyz[0], prim->verts[0].xyz[1]);
-      }
-      gl2ps->streamlength += gl2psPrintf("S\n");
-      gl2ps->streamlength += gl2psPrintf("0 J\n");
-      break;
-    case GL2PS_LINE:
-      /* We try to use as few paths as possible to draw lines, in
-         order to get nice stippling even when the individual segments
-         are smaller than the stipple */
-      gl2ps->streamlength += gl2psPrintPDFLineWidth(prim->width);
-      gl2ps->streamlength += gl2psPrintPDFStrokeColor(prim->verts[0].rgba);
-      gl2ps->streamlength += gl2psPrintPostScriptDash(prim->pattern, prim->factor, "d");
-      /* start new path */
-      gl2ps->streamlength +=
-        gl2psPrintf("%f %f m\n",
-                    prim->verts[0].xyz[0], prim->verts[0].xyz[1]);
-
-      for(j = 1; j <= lastel; ++j){
-        prev = prim;
-        prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j);
-        if(!gl2psSamePosition(prim->verts[0].xyz, prev->verts[1].xyz)){
-          /* the starting point of the new segment does not match the
-             end point of the previous line, so we end the current
-             path and start a new one */
-          gl2ps->streamlength +=
-            gl2psPrintf("%f %f l\n",
-                        prev->verts[1].xyz[0], prev->verts[1].xyz[1]);
-          gl2ps->streamlength +=
-            gl2psPrintf("%f %f m\n",
-                        prim->verts[0].xyz[0], prim->verts[0].xyz[1]);
-        }
-        else{
-          /* the two segements are connected, so we just append to the
-             current path */
-          gl2ps->streamlength +=
-            gl2psPrintf("%f %f l\n",
-                        prim->verts[0].xyz[0], prim->verts[0].xyz[1]);
-        }
-      }
-      /* end last path */
-      gl2ps->streamlength +=
-        gl2psPrintf("%f %f l\n",
-                    prim->verts[1].xyz[0], prim->verts[1].xyz[1]);
-      gl2ps->streamlength += gl2psPrintf("S\n");
-      break;
-    case GL2PS_TRIANGLE:
-      gl2psFillTriangleFromPrimitive(&t, prim, GL_TRUE);
-      gl2psSortOutTrianglePDFgroup(gro);
-
-      /* No alpha and const color: Simple PDF draw orders  */
-      if(t.prop & T_CONST_COLOR && t.prop & T_ALPHA_1){
-        gl2ps->streamlength += gl2psPrintPDFFillColor(t.vertex[0].rgba);
-        for(j = 0; j <= lastel; ++j){
-          prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j);
-          gl2psFillTriangleFromPrimitive(&t, prim, GL_FALSE);
-          gl2ps->streamlength
-            += gl2psPrintf("%f %f m\n"
-                           "%f %f l\n"
-                           "%f %f l\n"
-                           "h f\n",
-                           t.vertex[0].xyz[0], t.vertex[0].xyz[1],
-                           t.vertex[1].xyz[0], t.vertex[1].xyz[1],
-                           t.vertex[2].xyz[0], t.vertex[2].xyz[1]);
-        }
-      }
-      /* Const alpha < 1 and const color: Simple PDF draw orders
-         and an extra extended Graphics State for the alpha const */
-      else if(t.prop & T_CONST_COLOR && t.prop & T_ALPHA_LESS_1){
-        gl2ps->streamlength += gl2psPrintf("q\n"
-                                           "/GS%d gs\n",
-                                           gro->gsno);
-        gl2ps->streamlength += gl2psPrintPDFFillColor(prim->verts[0].rgba);
-        for(j = 0; j <= lastel; ++j){
-          prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j);
-          gl2psFillTriangleFromPrimitive(&t, prim, GL_FALSE);
-          gl2ps->streamlength
-            += gl2psPrintf("%f %f m\n"
-                           "%f %f l\n"
-                           "%f %f l\n"
-                           "h f\n",
-                           t.vertex[0].xyz[0], t.vertex[0].xyz[1],
-                           t.vertex[1].xyz[0], t.vertex[1].xyz[1],
-                           t.vertex[2].xyz[0], t.vertex[2].xyz[1]);
-        }
-        gl2ps->streamlength += gl2psPrintf("Q\n");
-      }
-      /* Variable alpha and const color: Simple PDF draw orders
-         and an extra extended Graphics State + Xobject + Shader
-         object for the alpha mask */
-      else if(t.prop & T_CONST_COLOR && t.prop & T_VAR_ALPHA){
-        gl2ps->streamlength += gl2psPrintf("q\n"
-                                           "/GS%d gs\n"
-                                           "/TrG%d Do\n",
-                                           gro->gsno, gro->trgroupno);
-        gl2ps->streamlength += gl2psPrintPDFFillColor(prim->verts[0].rgba);
-        for(j = 0; j <= lastel; ++j){
-          prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j);
-          gl2psFillTriangleFromPrimitive(&t, prim, GL_FALSE);
-          gl2ps->streamlength
-            += gl2psPrintf("%f %f m\n"
-                           "%f %f l\n"
-                           "%f %f l\n"
-                           "h f\n",
-                           t.vertex[0].xyz[0], t.vertex[0].xyz[1],
-                           t.vertex[1].xyz[0], t.vertex[1].xyz[1],
-                           t.vertex[2].xyz[0], t.vertex[2].xyz[1]);
-        }
-        gl2ps->streamlength += gl2psPrintf("Q\n");
-      }
-      /* Variable color and no alpha: Shader Object for the colored
-         triangle(s) */
-      else if(t.prop & T_VAR_COLOR && t.prop & T_ALPHA_1){
-        gl2ps->streamlength += gl2psPrintf("/Sh%d sh\n", gro->shno);
-      }
-      /* Variable color and const alpha < 1: Shader Object for the
-         colored triangle(s) and an extra extended Graphics State
-         for the alpha const */
-      else if(t.prop & T_VAR_COLOR && t.prop & T_ALPHA_LESS_1){
-        gl2ps->streamlength += gl2psPrintf("q\n"
-                                           "/GS%d gs\n"
-                                           "/Sh%d sh\n"
-                                           "Q\n",
-                                           gro->gsno, gro->shno);
-      }
-      /* Variable alpha and color: Shader Object for the colored
-         triangle(s) and an extra extended Graphics State
-         + Xobject + Shader object for the alpha mask */
-      else if(t.prop & T_VAR_COLOR && t.prop & T_VAR_ALPHA){
-        gl2ps->streamlength += gl2psPrintf("q\n"
-                                           "/GS%d gs\n"
-                                           "/TrG%d Do\n"
-                                           "/Sh%d sh\n"
-                                           "Q\n",
-                                           gro->gsno, gro->trgroupno, gro->shno);
-      }
-      break;
-    case GL2PS_PIXMAP:
-      for(j = 0; j <= lastel; ++j){
-        prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j);
-        gl2psPutPDFImage(prim->data.image, gro->imno, prim->verts[0].xyz[0],
-                         prim->verts[0].xyz[1]);
-      }
-      break;
-    case GL2PS_TEXT:
-      for(j = 0; j <= lastel; ++j){
-        prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j);
-        gl2ps->streamlength += gl2psPrintPDFFillColor(prim->verts[0].rgba);
-        gl2psPutPDFText(prim->data.text, gro->fontno, prim->verts[0].xyz[0],
-                        prim->verts[0].xyz[1]);
-      }
-      break;
-    default:
-      break;
-    }
-  }
-}
-
-/* Graphics State names */
-
-static int gl2psPDFgroupListWriteGStateResources(void)
-{
-  GL2PSpdfgroup *gro;
-  int offs = 0;
-  int i;
-
-  offs += fprintf(gl2ps->stream,
-                  "/ExtGState\n"
-                  "<<\n"
-                  "/GSa 7 0 R\n");
-  for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){
-    gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i);
-    if(gro->gsno >= 0)
-      offs += fprintf(gl2ps->stream, "/GS%d %d 0 R\n", gro->gsno, gro->gsobjno);
-  }
-  offs += fprintf(gl2ps->stream, ">>\n");
-  return offs;
-}
-
-/* Main Shader names */
-
-static int gl2psPDFgroupListWriteShaderResources(void)
-{
-  GL2PSpdfgroup *gro;
-  int offs = 0;
-  int i;
-
-  offs += fprintf(gl2ps->stream,
-                  "/Shading\n"
-                  "<<\n");
-  for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){
-    gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i);
-    if(gro->shno >= 0)
-      offs += fprintf(gl2ps->stream, "/Sh%d %d 0 R\n", gro->shno, gro->shobjno);
-    if(gro->maskshno >= 0)
-      offs += fprintf(gl2ps->stream, "/TrSh%d %d 0 R\n", gro->maskshno, gro->maskshobjno);
-  }
-  offs += fprintf(gl2ps->stream,">>\n");
-  return offs;
-}
-
-/* Images & Mask Shader XObject names */
-
-static int gl2psPDFgroupListWriteXObjectResources(void)
-{
-  int i;
-  GL2PSprimitive *p = NULL;
-  GL2PSpdfgroup *gro;
-  int offs = 0;
-
-  offs += fprintf(gl2ps->stream,
-                  "/XObject\n"
-                  "<<\n");
-
-  for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){
-    gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i);
-    if(!gl2psListNbr(gro->ptrlist))
-      continue;
-    p = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, 0);
-    switch(p->type){
-    case GL2PS_PIXMAP:
-      gro->imobjno = gl2ps->objects_stack++;
-      if(GL_RGBA == p->data.image->format)  /* reserve one object for image mask */
-        gl2ps->objects_stack++;
-      offs += fprintf(gl2ps->stream, "/Im%d %d 0 R\n", gro->imno, gro->imobjno);
-    case GL2PS_TRIANGLE:
-      if(gro->trgroupno >=0)
-        offs += fprintf(gl2ps->stream, "/TrG%d %d 0 R\n", gro->trgroupno, gro->trgroupobjno);
-      break;
-    default:
-      break;
-    }
-  }
-  offs += fprintf(gl2ps->stream,">>\n");
-  return offs;
-}
-
-/* Font names */
-
-static int gl2psPDFgroupListWriteFontResources(void)
-{
-  int i;
-  GL2PSpdfgroup *gro;
-  int offs = 0;
-
-  offs += fprintf(gl2ps->stream, "/Font\n<<\n");
-
-  for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){
-    gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i);
-    if(gro->fontno < 0)
-      continue;
-    gro->fontobjno = gl2ps->objects_stack++;
-    offs += fprintf(gl2ps->stream, "/F%d %d 0 R\n", gro->fontno, gro->fontobjno);
-  }
-  offs += fprintf(gl2ps->stream, ">>\n");
-
-  return offs;
-}
-
-static void gl2psPDFgroupListDelete(void)
-{
-  int i;
-  GL2PSpdfgroup *gro = NULL;
-
-  if(!gl2ps->pdfgrouplist)
-    return;
-
-  for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){
-    gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist,i);
-    gl2psListDelete(gro->ptrlist);
-  }
-
-  gl2psListDelete(gl2ps->pdfgrouplist);
-  gl2ps->pdfgrouplist = NULL;
-}
-
-/* Print 1st PDF object - file info */
-
-static int gl2psPrintPDFInfo(void)
-{
-  int offs;
-  time_t now;
-  struct tm *newtime;
-
-  time(&now);
-  newtime = gmtime(&now);
-
-  offs = fprintf(gl2ps->stream,
-                 "1 0 obj\n"
-                 "<<\n"
-                 "/Title (%s)\n"
-                 "/Creator (GL2PS %d.%d.%d%s, %s)\n"
-                 "/Producer (%s)\n",
-                 gl2ps->title, GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION,
-                 GL2PS_PATCH_VERSION, GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT,
-                 gl2ps->producer);
-
-  if(!newtime){
-    offs += fprintf(gl2ps->stream,
-                    ">>\n"
-                    "endobj\n");
-    return offs;
-  }
-
-  offs += fprintf(gl2ps->stream,
-                  "/CreationDate (D:%d%02d%02d%02d%02d%02d)\n"
-                  ">>\n"
-                  "endobj\n",
-                  newtime->tm_year+1900,
-                  newtime->tm_mon+1,
-                  newtime->tm_mday,
-                  newtime->tm_hour,
-                  newtime->tm_min,
-                  newtime->tm_sec);
-  return offs;
-}
-
-/* Create catalog and page structure - 2nd and 3th PDF object */
-
-static int gl2psPrintPDFCatalog(void)
-{
-  return fprintf(gl2ps->stream,
-                 "2 0 obj\n"
-                 "<<\n"
-                 "/Type /Catalog\n"
-                 "/Pages 3 0 R\n"
-                 ">>\n"
-                 "endobj\n");
-}
-
-static int gl2psPrintPDFPages(void)
-{
-  return fprintf(gl2ps->stream,
-                 "3 0 obj\n"
-                 "<<\n"
-                 "/Type /Pages\n"
-                 "/Kids [6 0 R]\n"
-                 "/Count 1\n"
-                 ">>\n"
-                 "endobj\n");
-}
-
-/* Open stream for data - graphical objects, fonts etc. PDF object 4 */
-
-static int gl2psOpenPDFDataStream(void)
-{
-  int offs = 0;
-
-  offs += fprintf(gl2ps->stream,
-                  "4 0 obj\n"
-                  "<<\n"
-                  "/Length 5 0 R\n" );
-  offs += gl2psPrintPDFCompressorType();
-  offs += fprintf(gl2ps->stream,
-                  ">>\n"
-                  "stream\n");
-  return offs;
-}
-
-/* Stream setup - Graphics state, fill background if allowed */
-
-static int gl2psOpenPDFDataStreamWritePreface(void)
-{
-  int offs;
-
-  offs = gl2psPrintf("/GSa gs\n");
-
-  if(gl2ps->options & GL2PS_DRAW_BACKGROUND){
-    offs += gl2psPrintPDFFillColor(gl2ps->bgcolor);
-    offs += gl2psPrintf("%d %d %d %d re\n",
-                        (int)gl2ps->viewport[0], (int)gl2ps->viewport[1],
-                        (int)gl2ps->viewport[2], (int)gl2ps->viewport[3]);
-    offs += gl2psPrintf("f\n");
-  }
-  return offs;
-}
-
-/* Use the functions above to create the first part of the PDF*/
-
-static void gl2psPrintPDFHeader(void)
-{
-  int offs = 0;
-  gl2ps->pdfprimlist = gl2psListCreate(500, 500, sizeof(GL2PSprimitive*));
-  gl2psPDFstacksInit();
-
-  gl2ps->xreflist = (int*)gl2psMalloc(sizeof(int) * gl2ps->objects_stack);
-
-#if defined(GL2PS_HAVE_ZLIB)
-  if(gl2ps->options & GL2PS_COMPRESS){
-    gl2psSetupCompress();
-  }
-#endif
-  gl2ps->xreflist[0] = 0;
-  offs += fprintf(gl2ps->stream, "%%PDF-1.4\n");
-  gl2ps->xreflist[1] = offs;
-
-  offs += gl2psPrintPDFInfo();
-  gl2ps->xreflist[2] = offs;
-
-  offs += gl2psPrintPDFCatalog();
-  gl2ps->xreflist[3] = offs;
-
-  offs += gl2psPrintPDFPages();
-  gl2ps->xreflist[4] = offs;
-
-  offs += gl2psOpenPDFDataStream();
-  gl2ps->xreflist[5] = offs; /* finished in gl2psPrintPDFFooter */
-  gl2ps->streamlength = gl2psOpenPDFDataStreamWritePreface();
-}
-
-/* The central primitive drawing */
-
-static void gl2psPrintPDFPrimitive(void *data)
-{
-  GL2PSprimitive *prim = *(GL2PSprimitive**)data;
-
-  if((gl2ps->options & GL2PS_OCCLUSION_CULL) && prim->culled)
-    return;
-
-  prim = gl2psCopyPrimitive(prim); /* deep copy */
-  gl2psListAdd(gl2ps->pdfprimlist, &prim);
-}
-
-/* close stream and ... */
-
-static int gl2psClosePDFDataStream(void)
-{
-  int offs = 0;
-
-#if defined(GL2PS_HAVE_ZLIB)
-  if(gl2ps->options & GL2PS_COMPRESS){
-    if(Z_OK != gl2psDeflate())
-      gl2psMsg(GL2PS_ERROR, "Zlib deflate error");
-    else
-      fwrite(gl2ps->compress->dest, gl2ps->compress->destLen, 1, gl2ps->stream);
-    gl2ps->streamlength += gl2ps->compress->destLen;
-
-    offs += gl2ps->streamlength;
-    gl2psFreeCompress();
-  }
-#endif
-
-  offs += fprintf(gl2ps->stream,
-                  "endstream\n"
-                  "endobj\n");
-  return offs;
-}
-
-/* ... write the now known length object */
-
-static int gl2psPrintPDFDataStreamLength(int val)
-{
-  return fprintf(gl2ps->stream,
-                 "5 0 obj\n"
-                 "%d\n"
-                 "endobj\n", val);
-}
-
-/* Put the info created before in PDF objects */
-
-static int gl2psPrintPDFOpenPage(void)
-{
-  int offs;
-
-  /* Write fixed part */
-
-  offs = fprintf(gl2ps->stream,
-                 "6 0 obj\n"
-                 "<<\n"
-                 "/Type /Page\n"
-                 "/Parent 3 0 R\n"
-                 "/MediaBox [%d %d %d %d]\n",
-                 (int)gl2ps->viewport[0], (int)gl2ps->viewport[1],
-                 (int)gl2ps->viewport[2], (int)gl2ps->viewport[3]);
-
-  if(gl2ps->options & GL2PS_LANDSCAPE)
-    offs += fprintf(gl2ps->stream, "/Rotate -90\n");
-
-  offs += fprintf(gl2ps->stream,
-                  "/Contents 4 0 R\n"
-                  "/Resources\n"
-                  "<<\n"
-                  "/ProcSet [/PDF /Text /ImageB /ImageC]  %%/ImageI\n");
-
-  return offs;
-
-  /* End fixed part, proceeds in gl2psPDFgroupListWriteVariableResources() */
-}
-
-static int gl2psPDFgroupListWriteVariableResources(void)
-{
-  int offs = 0;
-
-  /* a) Graphics States for shader alpha masks*/
-  offs += gl2psPDFgroupListWriteGStateResources();
-
-  /* b) Shader and shader masks */
-  offs += gl2psPDFgroupListWriteShaderResources();
-
-  /* c) XObjects (Images & Shader Masks) */
-  offs += gl2psPDFgroupListWriteXObjectResources();
-
-  /* d) Fonts */
-  offs += gl2psPDFgroupListWriteFontResources();
-
-  /* End resources and page */
-  offs += fprintf(gl2ps->stream,
-                  ">>\n"
-                  ">>\n"
-                  "endobj\n");
-  return offs;
-}
-
-/* Standard Graphics State */
-
-static int gl2psPrintPDFGSObject(void)
-{
-  return fprintf(gl2ps->stream,
-                 "7 0 obj\n"
-                 "<<\n"
-                 "/Type /ExtGState\n"
-                 "/SA false\n"
-                 "/SM 0.02\n"
-                 "/OP false\n"
-                 "/op false\n"
-                 "/OPM 0\n"
-                 "/BG2 /Default\n"
-                 "/UCR2 /Default\n"
-                 "/TR2 /Default\n"
-                 ">>\n"
-                 "endobj\n");
-}
-
-/* Put vertex' edge flag (8bit) and coordinates (32bit) in shader stream */
-
-static int gl2psPrintPDFShaderStreamDataCoord(GL2PSvertex *vertex,
-                                              int (*action)(unsigned long data, int size),
-                                              GLfloat dx, GLfloat dy,
-                                              GLfloat xmin, GLfloat ymin)
-{
-  int offs = 0;
-  unsigned long imap;
-  GLfloat diff;
-  double dmax = ~1UL;
-  char edgeflag = 0;
-
-  /* FIXME: temp bux fix for 64 bit archs: */
-  if(sizeof(unsigned long) == 8) dmax = dmax - 2048.;
-
-  offs += (*action)(edgeflag, 1);
-
-  /* The Shader stream in PDF requires to be in a 'big-endian'
-     order */
-
-  if(GL2PS_ZERO(dx * dy)){
-    offs += (*action)(0, 4);
-    offs += (*action)(0, 4);
-  }
-  else{
-    diff = (vertex->xyz[0] - xmin) / dx;
-    if(diff > 1)
-      diff = 1.0F;
-    else if(diff < 0)
-      diff = 0.0F;
-    imap = (unsigned long)(diff * dmax);
-    offs += (*action)(imap, 4);
-
-    diff = (vertex->xyz[1] - ymin) / dy;
-    if(diff > 1)
-      diff = 1.0F;
-    else if(diff < 0)
-      diff = 0.0F;
-    imap = (unsigned long)(diff * dmax);
-    offs += (*action)(imap, 4);
-  }
-
-  return offs;
-}
-
-/* Put vertex' rgb value (8bit for every component) in shader stream */
-
-static int gl2psPrintPDFShaderStreamDataRGB(GL2PSvertex *vertex,
-                                            int (*action)(unsigned long data, int size))
-{
-  int offs = 0;
-  unsigned long imap;
-  double dmax = ~1UL;
-
-  /* FIXME: temp bux fix for 64 bit archs: */
-  if(sizeof(unsigned long) == 8) dmax = dmax - 2048.;
-
-  imap = (unsigned long)((vertex->rgba[0]) * dmax);
-  offs += (*action)(imap, 1);
-
-  imap = (unsigned long)((vertex->rgba[1]) * dmax);
-  offs += (*action)(imap, 1);
-
-  imap = (unsigned long)((vertex->rgba[2]) * dmax);
-  offs += (*action)(imap, 1);
-
-  return offs;
-}
-
-/* Put vertex' alpha (8/16bit) in shader stream */
-
-static int gl2psPrintPDFShaderStreamDataAlpha(GL2PSvertex *vertex,
-                                              int (*action)(unsigned long data, int size),
-                                              int sigbyte)
-{
-  int offs = 0;
-  unsigned long imap;
-  double dmax = ~1UL;
-
-  /* FIXME: temp bux fix for 64 bit archs: */
-  if(sizeof(unsigned long) == 8) dmax = dmax - 2048.;
-
-  if(sigbyte != 8 && sigbyte != 16)
-    sigbyte = 8;
-
-  sigbyte /= 8;
-
-  imap = (unsigned long)((vertex->rgba[3]) * dmax);
-
-  offs += (*action)(imap, sigbyte);
-
-  return offs;
-}
-
-/* Put a triangles raw data in shader stream */
-
-static int gl2psPrintPDFShaderStreamData(GL2PStriangle *triangle,
-                                         GLfloat dx, GLfloat dy,
-                                         GLfloat xmin, GLfloat ymin,
-                                         int (*action)(unsigned long data, int size),
-                                         int gray)
-{
-  int i, offs = 0;
-  GL2PSvertex v;
-
-  if(gray && gray != 8 && gray != 16)
-    gray = 8;
-
-  for(i = 0; i < 3; ++i){
-    offs += gl2psPrintPDFShaderStreamDataCoord(&triangle->vertex[i], action,
-                                               dx, dy, xmin, ymin);
-    if(gray){
-      v = triangle->vertex[i];
-      offs += gl2psPrintPDFShaderStreamDataAlpha(&v, action, gray);
-    }
-    else{
-      offs += gl2psPrintPDFShaderStreamDataRGB(&triangle->vertex[i], action);
-    }
-  }
-
-  return offs;
-}
-
-static void gl2psPDFRectHull(GLfloat *xmin, GLfloat *xmax,
-                             GLfloat *ymin, GLfloat *ymax,
-                             GL2PStriangle *triangles, int cnt)
-{
-  int i, j;
-
-  *xmin = triangles[0].vertex[0].xyz[0];
-  *xmax = triangles[0].vertex[0].xyz[0];
-  *ymin = triangles[0].vertex[0].xyz[1];
-  *ymax = triangles[0].vertex[0].xyz[1];
-
-  for(i = 0; i < cnt; ++i){
-    for(j = 0; j < 3; ++j){
-      if(*xmin > triangles[i].vertex[j].xyz[0])
-        *xmin = triangles[i].vertex[j].xyz[0];
-      if(*xmax < triangles[i].vertex[j].xyz[0])
-        *xmax = triangles[i].vertex[j].xyz[0];
-      if(*ymin > triangles[i].vertex[j].xyz[1])
-        *ymin = triangles[i].vertex[j].xyz[1];
-      if(*ymax < triangles[i].vertex[j].xyz[1])
-        *ymax = triangles[i].vertex[j].xyz[1];
-    }
-  }
-}
-
-/* Writes shaded triangle
-   gray == 0 means write RGB triangles
-   gray == 8             8bit-grayscale (for alpha masks)
-   gray == 16            16bit-grayscale (for alpha masks) */
-
-static int gl2psPrintPDFShader(int obj, GL2PStriangle *triangles,
-                               int size, int gray)
-{
-  int i, offs = 0, vertexbytes, done = 0;
-  GLfloat xmin, xmax, ymin, ymax;
-
-  switch(gray){
-  case 0:
-    vertexbytes = 1+4+4+1+1+1;
-    break;
-  case 8:
-    vertexbytes = 1+4+4+1;
-    break;
-  case 16:
-    vertexbytes = 1+4+4+2;
-    break;
-  default:
-    gray = 8;
-    vertexbytes = 1+4+4+1;
-    break;
-  }
-
-  gl2psPDFRectHull(&xmin, &xmax, &ymin, &ymax, triangles, size);
-
-  offs += fprintf(gl2ps->stream,
-                  "%d 0 obj\n"
-                  "<< "
-                  "/ShadingType 4 "
-                  "/ColorSpace %s "
-                  "/BitsPerCoordinate 32 "
-                  "/BitsPerComponent %d "
-                  "/BitsPerFlag 8 "
-                  "/Decode [%f %f %f %f 0 1 %s] ",
-                  obj,
-                  (gray) ? "/DeviceGray" : "/DeviceRGB",
-                  (gray) ? gray : 8,
-                  xmin, xmax, ymin, ymax,
-                  (gray) ? "" : "0 1 0 1");
-
-#if defined(GL2PS_HAVE_ZLIB)
-  if(gl2ps->options & GL2PS_COMPRESS){
-    gl2psAllocCompress(vertexbytes * size * 3);
-
-    for(i = 0; i < size; ++i)
-      gl2psPrintPDFShaderStreamData(&triangles[i],
-                                    xmax-xmin, ymax-ymin, xmin, ymin,
-                                    gl2psWriteBigEndianCompress, gray);
-
-    if(Z_OK == gl2psDeflate() && 23 + gl2ps->compress->destLen < gl2ps->compress->srcLen){
-      offs += gl2psPrintPDFCompressorType();
-      offs += fprintf(gl2ps->stream,
-                      "/Length %d "
-                      ">>\n"
-                      "stream\n",
-                      (int)gl2ps->compress->destLen);
-      offs += gl2ps->compress->destLen * fwrite(gl2ps->compress->dest,
-                                                gl2ps->compress->destLen,
-                                                1, gl2ps->stream);
-      done = 1;
-    }
-    gl2psFreeCompress();
-  }
-#endif
-
-  if(!done){
-    /* no compression, or too long after compression, or compress error
-       -> write non-compressed entry */
-    offs += fprintf(gl2ps->stream,
-                    "/Length %d "
-                    ">>\n"
-                    "stream\n",
-                    vertexbytes * 3 * size);
-    for(i = 0; i < size; ++i)
-      offs += gl2psPrintPDFShaderStreamData(&triangles[i],
-                                            xmax-xmin, ymax-ymin, xmin, ymin,
-                                            gl2psWriteBigEndian, gray);
-  }
-
-  offs += fprintf(gl2ps->stream,
-                  "\nendstream\n"
-                  "endobj\n");
-
-  return offs;
-}
-
-/* Writes a XObject for a shaded triangle mask */
-
-static int gl2psPrintPDFShaderMask(int obj, int childobj)
-{
-  int offs = 0, len;
-
-  offs += fprintf(gl2ps->stream,
-                  "%d 0 obj\n"
-                  "<<\n"
-                  "/Type /XObject\n"
-                  "/Subtype /Form\n"
-                  "/BBox [ %d %d %d %d ]\n"
-                  "/Group \n<<\n/S /Transparency /CS /DeviceRGB\n"
-                  ">>\n",
-                  obj,
-                  (int)gl2ps->viewport[0], (int)gl2ps->viewport[1],
-                  (int)gl2ps->viewport[2], (int)gl2ps->viewport[3]);
-
-  len = (childobj>0)
-    ? strlen("/TrSh sh\n") + (int)log10((double)childobj)+1
-    : strlen("/TrSh0 sh\n");
-
-  offs += fprintf(gl2ps->stream,
-                  "/Length %d\n"
-                  ">>\n"
-                  "stream\n",
-                  len);
-  offs += fprintf(gl2ps->stream,
-                  "/TrSh%d sh\n",
-                  childobj);
-  offs += fprintf(gl2ps->stream,
-                  "endstream\n"
-                  "endobj\n");
-
-  return offs;
-}
-
-/* Writes a Extended graphics state for a shaded triangle mask if
-   simplealpha ist true the childobj argument is ignored and a /ca
-   statement will be written instead */
-
-static int gl2psPrintPDFShaderExtGS(int obj, int childobj)
-{
-  int offs = 0;
-
-  offs += fprintf(gl2ps->stream,
-                  "%d 0 obj\n"
-                  "<<\n",
-                  obj);
-
-  offs += fprintf(gl2ps->stream,
-                  "/SMask << /S /Alpha /G %d 0 R >> ",
-                  childobj);
-
-  offs += fprintf(gl2ps->stream,
-                  ">>\n"
-                  "endobj\n");
-  return offs;
-}
-
-/* a simple graphics state */
-
-static int gl2psPrintPDFShaderSimpleExtGS(int obj, GLfloat alpha)
-{
-  int offs = 0;
-
-  offs += fprintf(gl2ps->stream,
-                  "%d 0 obj\n"
-                  "<<\n"
-                  "/ca %g"
-                  ">>\n"
-                  "endobj\n",
-                  obj, alpha);
-  return offs;
-}
-
-/* Similar groups of functions for pixmaps and text */
-
-static int gl2psPrintPDFPixmapStreamData(GL2PSimage *im,
-                                         int (*action)(unsigned long data, int size),
-                                         int gray)
-{
-  int x, y, shift;
-  GLfloat r, g, b, a;
-
-  if(im->format != GL_RGBA && gray)
-    return 0;
-
-  if(gray && gray != 8 && gray != 16)
-    gray = 8;
-
-  gray /= 8;
-
-  shift = (sizeof(unsigned long) - 1) * 8;
-
-  for(y = 0; y < im->height; ++y){
-    for(x = 0; x < im->width; ++x){
-      a = gl2psGetRGB(im, x, y, &r, &g, &b);
-      if(im->format == GL_RGBA && gray){
-        (*action)((unsigned long)(a * 255) << shift, gray);
-      }
-      else{
-        (*action)((unsigned long)(r * 255) << shift, 1);
-        (*action)((unsigned long)(g * 255) << shift, 1);
-        (*action)((unsigned long)(b * 255) << shift, 1);
-      }
-    }
-  }
-
-  switch(gray){
-  case 0: return 3 * im->width * im->height;
-  case 1: return im->width * im->height;
-  case 2: return 2 * im->width * im->height;
-  default: return 3 * im->width * im->height;
-  }
-}
-
-static int gl2psPrintPDFPixmap(int obj, int childobj, GL2PSimage *im, int gray)
-{
-  int offs = 0, done = 0, sigbytes = 3;
-
-  if(gray && gray !=8 && gray != 16)
-    gray = 8;
-
-  if(gray)
-    sigbytes = gray / 8;
-
-  offs += fprintf(gl2ps->stream,
-                  "%d 0 obj\n"
-                  "<<\n"
-                  "/Type /XObject\n"
-                  "/Subtype /Image\n"
-                  "/Width %d\n"
-                  "/Height %d\n"
-                  "/ColorSpace %s \n"
-                  "/BitsPerComponent 8\n",
-                  obj,
-                  (int)im->width, (int)im->height,
-                  (gray) ? "/DeviceGray" : "/DeviceRGB" );
-  if(GL_RGBA == im->format && gray == 0){
-    offs += fprintf(gl2ps->stream,
-                    "/SMask %d 0 R\n",
-                    childobj);
-  }
-
-#if defined(GL2PS_HAVE_ZLIB)
-  if(gl2ps->options & GL2PS_COMPRESS){
-    gl2psAllocCompress((int)(im->width * im->height * sigbytes));
-
-    gl2psPrintPDFPixmapStreamData(im, gl2psWriteBigEndianCompress, gray);
-
-    if(Z_OK == gl2psDeflate() && 23 + gl2ps->compress->destLen < gl2ps->compress->srcLen){
-      offs += gl2psPrintPDFCompressorType();
-      offs += fprintf(gl2ps->stream,
-                      "/Length %d "
-                      ">>\n"
-                      "stream\n",
-                      (int)gl2ps->compress->destLen);
-      offs += gl2ps->compress->destLen * fwrite(gl2ps->compress->dest, gl2ps->compress->destLen,
-                                                1, gl2ps->stream);
-      done = 1;
-    }
-    gl2psFreeCompress();
-  }
-#endif
-
-  if(!done){
-    /* no compression, or too long after compression, or compress error
-       -> write non-compressed entry */
-    offs += fprintf(gl2ps->stream,
-                    "/Length %d "
-                    ">>\n"
-                    "stream\n",
-                    (int)(im->width * im->height * sigbytes));
-    offs += gl2psPrintPDFPixmapStreamData(im, gl2psWriteBigEndian, gray);
-  }
-
-  offs += fprintf(gl2ps->stream,
-                  "\nendstream\n"
-                  "endobj\n");
-
-  return offs;
-}
-
-static int gl2psPrintPDFText(int obj, GL2PSstring *s, int fontnumber)
-{
-  int offs = 0;
-
-  offs += fprintf(gl2ps->stream,
-                  "%d 0 obj\n"
-                  "<<\n"
-                  "/Type /Font\n"
-                  "/Subtype /Type1\n"
-                  "/Name /F%d\n"
-                  "/BaseFont /%s\n"
-                  "/Encoding /MacRomanEncoding\n"
-                  ">>\n"
-                  "endobj\n",
-                  obj, fontnumber, s->fontname);
-  return offs;
-}
-
-/* Write the physical objects */
-
-static int gl2psPDFgroupListWriteObjects(int entryoffs)
-{
-  int i,j;
-  GL2PSprimitive *p = NULL;
-  GL2PSpdfgroup *gro;
-  int offs = entryoffs;
-  GL2PStriangle *triangles;
-  int size = 0;
-
-  if(!gl2ps->pdfgrouplist)
-    return offs;
-
-  for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){
-    gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i);
-    if(!gl2psListNbr(gro->ptrlist))
-      continue;
-    p = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, 0);
-    switch(p->type){
-    case GL2PS_POINT:
-      break;
-    case GL2PS_LINE:
-      break;
-    case GL2PS_TRIANGLE:
-      size = gl2psListNbr(gro->ptrlist);
-      triangles = (GL2PStriangle*)gl2psMalloc(sizeof(GL2PStriangle) * size);
-      for(j = 0; j < size; ++j){
-        p = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j);
-        gl2psFillTriangleFromPrimitive(&triangles[j], p, GL_TRUE);
-      }
-      if(triangles[0].prop & T_VAR_COLOR){
-        gl2ps->xreflist[gro->shobjno] = offs;
-        offs += gl2psPrintPDFShader(gro->shobjno, triangles, size, 0);
-      }
-      if(triangles[0].prop & T_ALPHA_LESS_1){
-        gl2ps->xreflist[gro->gsobjno] = offs;
-        offs += gl2psPrintPDFShaderSimpleExtGS(gro->gsobjno, triangles[0].vertex[0].rgba[3]);
-      }
-      if(triangles[0].prop & T_VAR_ALPHA){
-        gl2ps->xreflist[gro->gsobjno] = offs;
-        offs += gl2psPrintPDFShaderExtGS(gro->gsobjno, gro->trgroupobjno);
-        gl2ps->xreflist[gro->trgroupobjno] = offs;
-        offs += gl2psPrintPDFShaderMask(gro->trgroupobjno, gro->maskshno);
-        gl2ps->xreflist[gro->maskshobjno] = offs;
-        offs += gl2psPrintPDFShader(gro->maskshobjno, triangles, size, 8);
-      }
-      gl2psFree(triangles);
-      break;
-    case GL2PS_PIXMAP:
-      gl2ps->xreflist[gro->imobjno] = offs;
-      offs += gl2psPrintPDFPixmap(gro->imobjno, gro->imobjno+1, p->data.image, 0);
-      if(p->data.image->format == GL_RGBA){
-        gl2ps->xreflist[gro->imobjno+1] = offs;
-        offs += gl2psPrintPDFPixmap(gro->imobjno+1, -1, p->data.image, 8);
-      }
-      break;
-    case GL2PS_TEXT:
-      gl2ps->xreflist[gro->fontobjno] = offs;
-      offs += gl2psPrintPDFText(gro->fontobjno,p->data.text,gro->fontno);
-      break;
-    case GL2PS_SPECIAL :
-      /* alignment contains the format for which the special output text
-         is intended */
-      if(p->data.text->alignment == GL2PS_PDF)
-        offs += fprintf(gl2ps->stream, "%s\n", p->data.text->str);
-      break;
-    default:
-      break;
-    }
-  }
-  return offs;
-}
-
-/* All variable data has been written at this point and all required
-   functioninality has been gathered, so we can write now file footer
-   with cross reference table and trailer */
-
-static void gl2psPrintPDFFooter(void)
-{
-  int i, offs;
-
-  gl2psPDFgroupListInit();
-  gl2psPDFgroupListWriteMainStream();
-
-  offs = gl2ps->xreflist[5] + gl2ps->streamlength;
-  offs += gl2psClosePDFDataStream();
-  gl2ps->xreflist[5] = offs;
-
-  offs += gl2psPrintPDFDataStreamLength(gl2ps->streamlength);
-  gl2ps->xreflist[6] = offs;
-  gl2ps->streamlength = 0;
-
-  offs += gl2psPrintPDFOpenPage();
-  offs += gl2psPDFgroupListWriteVariableResources();
-  gl2ps->xreflist = (int*)gl2psRealloc(gl2ps->xreflist,
-                                       sizeof(int) * (gl2ps->objects_stack + 1));
-  gl2ps->xreflist[7] = offs;
-
-  offs += gl2psPrintPDFGSObject();
-  gl2ps->xreflist[8] = offs;
-
-  gl2ps->xreflist[gl2ps->objects_stack] =
-    gl2psPDFgroupListWriteObjects(gl2ps->xreflist[8]);
-
-  /* Start cross reference table. The file has to been opened in
-     binary mode to preserve the 20 digit string length! */
-  fprintf(gl2ps->stream,
-          "xref\n"
-          "0 %d\n"
-          "%010d 65535 f \n", gl2ps->objects_stack, 0);
-
-  for(i = 1; i < gl2ps->objects_stack; ++i)
-    fprintf(gl2ps->stream, "%010d 00000 n \n", gl2ps->xreflist[i]);
-
-  fprintf(gl2ps->stream,
-          "trailer\n"
-          "<<\n"
-          "/Size %d\n"
-          "/Info 1 0 R\n"
-          "/Root 2 0 R\n"
-          ">>\n"
-          "startxref\n%d\n"
-          "%%%%EOF\n",
-          gl2ps->objects_stack, gl2ps->xreflist[gl2ps->objects_stack]);
-
-  /* Free auxiliary lists and arrays */
-  gl2psFree(gl2ps->xreflist);
-  gl2psListAction(gl2ps->pdfprimlist, gl2psFreePrimitive);
-  gl2psListDelete(gl2ps->pdfprimlist);
-  gl2psPDFgroupListDelete();
-
-#if defined(GL2PS_HAVE_ZLIB)
-  if(gl2ps->options & GL2PS_COMPRESS){
-    gl2psFreeCompress();
-    gl2psFree(gl2ps->compress);
-    gl2ps->compress = NULL;
-  }
-#endif
-}
-
-/* PDF begin viewport */
-
-static void gl2psPrintPDFBeginViewport(GLint viewport[4])
-{
-  int offs = 0;
-  GLint index;
-  GLfloat rgba[4];
-  int x = viewport[0], y = viewport[1], w = viewport[2], h = viewport[3];
-
-  glRenderMode(GL_FEEDBACK);
-
-  if(gl2ps->header){
-    gl2psPrintPDFHeader();
-    gl2ps->header = GL_FALSE;
-  }
-
-  offs += gl2psPrintf("q\n");
-
-  if(gl2ps->options & GL2PS_DRAW_BACKGROUND){
-    if(gl2ps->colormode == GL_RGBA || gl2ps->colorsize == 0){
-      glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba);
-    }
-    else{
-      glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index);
-      rgba[0] = gl2ps->colormap[index][0];
-      rgba[1] = gl2ps->colormap[index][1];
-      rgba[2] = gl2ps->colormap[index][2];
-      rgba[3] = 1.0F;
-    }
-    offs += gl2psPrintPDFFillColor(rgba);
-    offs += gl2psPrintf("%d %d %d %d re\n"
-                        "W\n"
-                        "f\n",
-                        x, y, w, h);
-  }
-  else{
-    offs += gl2psPrintf("%d %d %d %d re\n"
-                        "W\n"
-                        "n\n",
-                        x, y, w, h);
-  }
-
-  gl2ps->streamlength += offs;
-}
-
-static GLint gl2psPrintPDFEndViewport(void)
-{
-  GLint res;
-
-  res = gl2psPrintPrimitives();
-  gl2ps->streamlength += gl2psPrintf("Q\n");
-  return res;
-}
-
-static void gl2psPrintPDFFinalPrimitive(void)
-{
-}
-
-/* definition of the PDF backend */
-
-static GL2PSbackend gl2psPDF = {
-  gl2psPrintPDFHeader,
-  gl2psPrintPDFFooter,
-  gl2psPrintPDFBeginViewport,
-  gl2psPrintPDFEndViewport,
-  gl2psPrintPDFPrimitive,
-  gl2psPrintPDFFinalPrimitive,
-  "pdf",
-  "Portable Document Format"
-};
-
-/*********************************************************************
- *
- * SVG routines
- *
- *********************************************************************/
-
-static void gl2psSVGGetCoordsAndColors(int n, GL2PSvertex *verts,
-                                       GL2PSxyz *xyz, GL2PSrgba *rgba)
-{
-  int i, j;
-
-  for(i = 0; i < n; i++){
-    xyz[i][0] = verts[i].xyz[0];
-    xyz[i][1] = gl2ps->viewport[3] - verts[i].xyz[1];
-    xyz[i][2] = 0.0F;
-    for(j = 0; j < 4; j++)
-      rgba[i][j] = verts[i].rgba[j];
-  }
-}
-
-static void gl2psSVGGetColorString(GL2PSrgba rgba, char str[32])
-{
-  int r = (int)(255. * rgba[0]);
-  int g = (int)(255. * rgba[1]);
-  int b = (int)(255. * rgba[2]);
-  int rc = (r < 0) ? 0 : (r > 255) ? 255 : r;
-  int gc = (g < 0) ? 0 : (g > 255) ? 255 : g;
-  int bc = (b < 0) ? 0 : (b > 255) ? 255 : b;
-  sprintf(str, "#%2.2x%2.2x%2.2x", rc, gc, bc);
-}
-
-static void gl2psPrintSVGHeader(void)
-{
-  int x, y, width, height;
-  char col[32];
-  time_t now;
-
-  time(&now);
-
-  if (gl2ps->options & GL2PS_LANDSCAPE){
-    x = (int)gl2ps->viewport[1];
-    y = (int)gl2ps->viewport[0];
-    width = (int)gl2ps->viewport[3];
-    height = (int)gl2ps->viewport[2];
-  }
-  else{
-    x = (int)gl2ps->viewport[0];
-    y = (int)gl2ps->viewport[1];
-    width = (int)gl2ps->viewport[2];
-    height = (int)gl2ps->viewport[3];
-  }
-
-  /* Compressed SVG files (.svgz) are simply gzipped SVG files */
-  gl2psPrintGzipHeader();
-
-  gl2psPrintf("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n");
-  gl2psPrintf("<svg xmlns=\"http://www.w3.org/2000/svg\"\n");
-  gl2psPrintf("     xmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
-              "     width=\"%dpx\" height=\"%dpx\" viewBox=\"%d %d %d %d\">\n",
-              width, height, x, y, width, height);
-  gl2psPrintf("<title>%s</title>\n", gl2ps->title);
-  gl2psPrintf("<desc>\n");
-  gl2psPrintf("Creator: GL2PS %d.%d.%d%s, %s\n"
-              "For: %s\n"
-              "CreationDate: %s",
-              GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION, GL2PS_PATCH_VERSION,
-              GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT, gl2ps->producer, ctime(&now));
-  gl2psPrintf("</desc>\n");
-  gl2psPrintf("<defs>\n");
-  gl2psPrintf("</defs>\n");
-
-  if(gl2ps->options & GL2PS_DRAW_BACKGROUND){
-    gl2psSVGGetColorString(gl2ps->bgcolor, col);
-    gl2psPrintf("<polygon fill=\"%s\" points=\"%d,%d %d,%d %d,%d %d,%d\"/>\n", col,
-                (int)gl2ps->viewport[0], (int)gl2ps->viewport[1],
-                (int)gl2ps->viewport[2], (int)gl2ps->viewport[1],
-                (int)gl2ps->viewport[2], (int)gl2ps->viewport[3],
-                (int)gl2ps->viewport[0], (int)gl2ps->viewport[3]);
-  }
-
-  /* group all the primitives and disable antialiasing */
-  gl2psPrintf("<g shape-rendering=\"crispEdges\">\n");
-}
-
-static void gl2psPrintSVGSmoothTriangle(GL2PSxyz xyz[3], GL2PSrgba rgba[3])
-{
-  int i;
-  GL2PSxyz xyz2[3];
-  GL2PSrgba rgba2[3];
-  char col[32];
-
-  /* Apparently there is no easy way to do Gouraud shading in SVG
-     without explicitly pre-defining gradients, so for now we just do
-     recursive subdivision */
-
-  if(gl2psSameColorThreshold(3, rgba, gl2ps->threshold)){
-    gl2psSVGGetColorString(rgba[0], col);
-    gl2psPrintf("<polygon fill=\"%s\" ", col);
-    if(rgba[0][3] < 1.0F) gl2psPrintf("fill-opacity=\"%g\" ", rgba[0][3]);
-    gl2psPrintf("points=\"%g,%g %g,%g %g,%g\"/>\n", xyz[0][0], xyz[0][1],
-                xyz[1][0], xyz[1][1], xyz[2][0], xyz[2][1]);
-  }
-  else{
-    /* subdivide into 4 subtriangles */
-    for(i = 0; i < 3; i++){
-      xyz2[0][i] = xyz[0][i];
-      xyz2[1][i] = 0.5F * (xyz[0][i] + xyz[1][i]);
-      xyz2[2][i] = 0.5F * (xyz[0][i] + xyz[2][i]);
-    }
-    for(i = 0; i < 4; i++){
-      rgba2[0][i] = rgba[0][i];
-      rgba2[1][i] = 0.5F * (rgba[0][i] + rgba[1][i]);
-      rgba2[2][i] = 0.5F * (rgba[0][i] + rgba[2][i]);
-    }
-    gl2psPrintSVGSmoothTriangle(xyz2, rgba2);
-    for(i = 0; i < 3; i++){
-      xyz2[0][i] = 0.5F * (xyz[0][i] + xyz[1][i]);
-      xyz2[1][i] = xyz[1][i];
-      xyz2[2][i] = 0.5F * (xyz[1][i] + xyz[2][i]);
-    }
-    for(i = 0; i < 4; i++){
-      rgba2[0][i] = 0.5F * (rgba[0][i] + rgba[1][i]);
-      rgba2[1][i] = rgba[1][i];
-      rgba2[2][i] = 0.5F * (rgba[1][i] + rgba[2][i]);
-    }
-    gl2psPrintSVGSmoothTriangle(xyz2, rgba2);
-    for(i = 0; i < 3; i++){
-      xyz2[0][i] = 0.5F * (xyz[0][i] + xyz[2][i]);
-      xyz2[1][i] = xyz[2][i];
-      xyz2[2][i] = 0.5F * (xyz[1][i] + xyz[2][i]);
-    }
-    for(i = 0; i < 4; i++){
-      rgba2[0][i] = 0.5F * (rgba[0][i] + rgba[2][i]);
-      rgba2[1][i] = rgba[2][i];
-      rgba2[2][i] = 0.5F * (rgba[1][i] + rgba[2][i]);
-    }
-    gl2psPrintSVGSmoothTriangle(xyz2, rgba2);
-    for(i = 0; i < 3; i++){
-      xyz2[0][i] = 0.5F * (xyz[0][i] + xyz[1][i]);
-      xyz2[1][i] = 0.5F * (xyz[1][i] + xyz[2][i]);
-      xyz2[2][i] = 0.5F * (xyz[0][i] + xyz[2][i]);
-    }
-    for(i = 0; i < 4; i++){
-      rgba2[0][i] = 0.5F * (rgba[0][i] + rgba[1][i]);
-      rgba2[1][i] = 0.5F * (rgba[1][i] + rgba[2][i]);
-      rgba2[2][i] = 0.5F * (rgba[0][i] + rgba[2][i]);
-    }
-    gl2psPrintSVGSmoothTriangle(xyz2, rgba2);
-  }
-}
-
-static void gl2psPrintSVGDash(GLushort pattern, GLint factor)
-{
-  int i, n, array[10];
-
-  if(!pattern || !factor) return; /* solid line */
-
-  gl2psParseStipplePattern(pattern, factor, &n, array);
-  gl2psPrintf("stroke-dasharray=\"");
-  for(i = 0; i < n; i++){
-    if(i) gl2psPrintf(",");
-    gl2psPrintf("%d", array[i]);
-  }
-  gl2psPrintf("\" ");
-}
-
-static void gl2psEndSVGLine(void)
-{
-  int i;
-  if(gl2ps->lastvertex.rgba[0] >= 0.){
-    gl2psPrintf("%g,%g\"/>\n", gl2ps->lastvertex.xyz[0],
-                gl2ps->viewport[3] - gl2ps->lastvertex.xyz[1]);
-    for(i = 0; i < 3; i++)
-      gl2ps->lastvertex.xyz[i] = -1.;
-    for(i = 0; i < 4; i++)
-      gl2ps->lastvertex.rgba[i] = -1.;
-  }
-}
-
-static void gl2psPrintSVGPixmap(GLfloat x, GLfloat y, GL2PSimage *pixmap)
-{
-#if defined(GL2PS_HAVE_LIBPNG)
-  GL2PSlist *png;
-  unsigned char c;
-  int i;
-
-  /* The only image types supported by the SVG standard are JPEG, PNG
-     and SVG. Here we choose PNG, and since we want to embed the image
-     directly in the SVG stream (and not link to an external image
-     file), we need to encode the pixmap into PNG in memory, then
-     encode it into base64. */
-
-  png = gl2psListCreate(pixmap->width * pixmap->height * 3, 1000,
-                        sizeof(unsigned char));
-  gl2psConvertPixmapToPNG(pixmap, png);
-  gl2psListEncodeBase64(png);
-  gl2psPrintf("<image x=\"%g\" y=\"%g\" width=\"%d\" height=\"%d\"\n",
-              x, y - pixmap->height, pixmap->width, pixmap->height);
-  gl2psPrintf("xlink:href=\"data:image/png;base64,");
-  for(i = 0; i < gl2psListNbr(png); i++){
-    gl2psListRead(png, i, &c);
-    gl2psPrintf("%c", c);
-  }
-  gl2psPrintf("\"/>\n");
-  gl2psListDelete(png);
-#else
-  (void) x; (void) y; (void) pixmap;  /* not used */
-  gl2psMsg(GL2PS_WARNING, "GL2PS must be compiled with PNG support in "
-           "order to embed images in SVG streams");
-#endif
-}
-
-static void gl2psPrintSVGPrimitive(void *data)
-{
-  GL2PSprimitive *prim;
-  GL2PSxyz xyz[4];
-  GL2PSrgba rgba[4];
-  char col[32];
-  int newline;
-
-  prim = *(GL2PSprimitive**)data;
-
-  if((gl2ps->options & GL2PS_OCCLUSION_CULL) && prim->culled) return;
-
-  /* We try to draw connected lines as a single path to get nice line
-     joins and correct stippling. So if the primitive to print is not
-     a line we must first finish the current line (if any): */
-  if(prim->type != GL2PS_LINE) gl2psEndSVGLine();
-
-  gl2psSVGGetCoordsAndColors(prim->numverts, prim->verts, xyz, rgba);
-
-  switch(prim->type){
-  case GL2PS_POINT :
-    gl2psSVGGetColorString(rgba[0], col);
-    gl2psPrintf("<circle fill=\"%s\" ", col);
-    if(rgba[0][3] < 1.0F) gl2psPrintf("fill-opacity=\"%g\" ", rgba[0][3]);
-    gl2psPrintf("cx=\"%g\" cy=\"%g\" r=\"%g\"/>\n",
-                xyz[0][0], xyz[0][1], 0.5 * prim->width);
-    break;
-  case GL2PS_LINE :
-    if(!gl2psSamePosition(gl2ps->lastvertex.xyz, prim->verts[0].xyz) ||
-       !gl2psSameColor(gl2ps->lastrgba, prim->verts[0].rgba) ||
-       gl2ps->lastlinewidth != prim->width ||
-       gl2ps->lastpattern != prim->pattern ||
-       gl2ps->lastfactor != prim->factor){
-      /* End the current line if the new segment does not start where
-         the last one ended, or if the color, the width or the
-         stippling have changed (we will need to use multi-point
-         gradients for smooth-shaded lines) */
-      gl2psEndSVGLine();
-      newline = 1;
-    }
-    else{
-      newline = 0;
-    }
-    gl2ps->lastvertex = prim->verts[1];
-    gl2psSetLastColor(prim->verts[0].rgba);
-    gl2ps->lastlinewidth = prim->width;
-    gl2ps->lastpattern = prim->pattern;
-    gl2ps->lastfactor = prim->factor;
-    if(newline){
-      gl2psSVGGetColorString(rgba[0], col);
-      gl2psPrintf("<polyline fill=\"none\" stroke=\"%s\" stroke-width=\"%g\" ",
-                  col, prim->width);
-      if(rgba[0][3] < 1.0F) gl2psPrintf("stroke-opacity=\"%g\" ", rgba[0][3]);
-      gl2psPrintSVGDash(prim->pattern, prim->factor);
-      gl2psPrintf("points=\"%g,%g ", xyz[0][0], xyz[0][1]);
-    }
-    else{
-      gl2psPrintf("%g,%g ", xyz[0][0], xyz[0][1]);
-    }
-    break;
-  case GL2PS_TRIANGLE :
-    gl2psPrintSVGSmoothTriangle(xyz, rgba);
-    break;
-  case GL2PS_QUADRANGLE :
-    gl2psMsg(GL2PS_WARNING, "There should not be any quad left to print");
-    break;
-  case GL2PS_PIXMAP :
-    gl2psPrintSVGPixmap(xyz[0][0], xyz[0][1], prim->data.image);
-    break;
-  case GL2PS_TEXT :
-    gl2psSVGGetColorString(prim->verts[0].rgba, col);
-    gl2psPrintf("<text fill=\"%s\" x=\"%g\" y=\"%g\" font-size=\"%d\" ",
-                col, xyz[0][0], xyz[0][1], prim->data.text->fontsize);
-    if(prim->data.text->angle)
-      gl2psPrintf("transform=\"rotate(%g, %g, %g)\" ",
-                  -prim->data.text->angle, xyz[0][0], xyz[0][1]);
-    switch(prim->data.text->alignment){
-    case GL2PS_TEXT_C:
-      gl2psPrintf("text-anchor=\"middle\" baseline-shift=\"%d\" ",
-                  -prim->data.text->fontsize / 2);
-      break;
-    case GL2PS_TEXT_CL:
-      gl2psPrintf("text-anchor=\"start\" baseline-shift=\"%d\" ",
-                  -prim->data.text->fontsize / 2);
-      break;
-    case GL2PS_TEXT_CR:
-      gl2psPrintf("text-anchor=\"end\" baseline-shift=\"%d\" ",
-                  -prim->data.text->fontsize / 2);
-      break;
-    case GL2PS_TEXT_B:
-      gl2psPrintf("text-anchor=\"middle\" baseline-shift=\"0\" ");
-      break;
-    case GL2PS_TEXT_BR:
-      gl2psPrintf("text-anchor=\"end\" baseline-shift=\"0\" ");
-      break;
-    case GL2PS_TEXT_T:
-      gl2psPrintf("text-anchor=\"middle\" baseline-shift=\"%d\" ",
-                  -prim->data.text->fontsize);
-      break;
-    case GL2PS_TEXT_TL:
-      gl2psPrintf("text-anchor=\"start\" baseline-shift=\"%d\" ",
-                  -prim->data.text->fontsize);
-      break;
-    case GL2PS_TEXT_TR:
-      gl2psPrintf("text-anchor=\"end\" baseline-shift=\"%d\" ",
-                  -prim->data.text->fontsize);
-      break;
-    case GL2PS_TEXT_BL:
-    default: /* same as GL2PS_TEXT_BL */
-      gl2psPrintf("text-anchor=\"start\" baseline-shift=\"0\" ");
-      break;
-    }
-    if(!strcmp(prim->data.text->fontname, "Times-Roman"))
-      gl2psPrintf("font-family=\"Times\">");
-    else if(!strcmp(prim->data.text->fontname, "Times-Bold"))
-      gl2psPrintf("font-family=\"Times\" font-weight=\"bold\">");
-    else if(!strcmp(prim->data.text->fontname, "Times-Italic"))
-      gl2psPrintf("font-family=\"Times\" font-style=\"italic\">");
-    else if(!strcmp(prim->data.text->fontname, "Times-BoldItalic"))
-      gl2psPrintf("font-family=\"Times\" font-style=\"italic\" font-weight=\"bold\">");
-    else if(!strcmp(prim->data.text->fontname, "Helvetica-Bold"))
-      gl2psPrintf("font-family=\"Helvetica\" font-weight=\"bold\">");
-    else if(!strcmp(prim->data.text->fontname, "Helvetica-Oblique"))
-      gl2psPrintf("font-family=\"Helvetica\" font-style=\"oblique\">");
-    else if(!strcmp(prim->data.text->fontname, "Helvetica-BoldOblique"))
-      gl2psPrintf("font-family=\"Helvetica\" font-style=\"oblique\" font-weight=\"bold\">");
-    else if(!strcmp(prim->data.text->fontname, "Courier-Bold"))
-      gl2psPrintf("font-family=\"Courier\" font-weight=\"bold\">");
-    else if(!strcmp(prim->data.text->fontname, "Courier-Oblique"))
-      gl2psPrintf("font-family=\"Courier\" font-style=\"oblique\">");
-    else if(!strcmp(prim->data.text->fontname, "Courier-BoldOblique"))
-      gl2psPrintf("font-family=\"Courier\" font-style=\"oblique\" font-weight=\"bold\">");
-    else
-      gl2psPrintf("font-family=\"%s\">", prim->data.text->fontname);
-    gl2psPrintf("%s</text>\n", prim->data.text->str);
-    break;
-  case GL2PS_SPECIAL :
-    /* alignment contains the format for which the special output text
-       is intended */
-    if(prim->data.text->alignment == GL2PS_SVG)
-      gl2psPrintf("%s\n", prim->data.text->str);
-    break;
-  default :
-    break;
-  }
-}
-
-static void gl2psPrintSVGFooter(void)
-{
-  gl2psPrintf("</g>\n");
-  gl2psPrintf("</svg>\n");
-
-  gl2psPrintGzipFooter();
-}
-
-static void gl2psPrintSVGBeginViewport(GLint viewport[4])
-{
-  GLint index;
-  char col[32];
-  GLfloat rgba[4];
-  int x = viewport[0], y = viewport[1], w = viewport[2], h = viewport[3];
-
-  glRenderMode(GL_FEEDBACK);
-
-  if(gl2ps->header){
-    gl2psPrintSVGHeader();
-    gl2ps->header = GL_FALSE;
-  }
-
-  if(gl2ps->options & GL2PS_DRAW_BACKGROUND){
-    if(gl2ps->colormode == GL_RGBA || gl2ps->colorsize == 0){
-      glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba);
-    }
-    else{
-      glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index);
-      rgba[0] = gl2ps->colormap[index][0];
-      rgba[1] = gl2ps->colormap[index][1];
-      rgba[2] = gl2ps->colormap[index][2];
-      rgba[3] = 1.0F;
-    }
-    gl2psSVGGetColorString(rgba, col);
-    gl2psPrintf("<polygon fill=\"%s\" points=\"%d,%d %d,%d %d,%d %d,%d\"/>\n", col,
-                x, gl2ps->viewport[3] - y,
-                x + w, gl2ps->viewport[3] - y,
-                x + w, gl2ps->viewport[3] - (y + h),
-                x, gl2ps->viewport[3] - (y + h));
-  }
-
-  gl2psPrintf("<clipPath id=\"cp%d%d%d%d\">\n", x, y, w, h);
-  gl2psPrintf("  <polygon points=\"%d,%d %d,%d %d,%d %d,%d\"/>\n",
-              x, gl2ps->viewport[3] - y,
-              x + w, gl2ps->viewport[3] - y,
-              x + w, gl2ps->viewport[3] - (y + h),
-              x, gl2ps->viewport[3] - (y + h));
-  gl2psPrintf("</clipPath>\n");
-  gl2psPrintf("<g clip-path=\"url(#cp%d%d%d%d)\">\n", x, y, w, h);
-}
-
-static GLint gl2psPrintSVGEndViewport(void)
-{
-  GLint res;
-
-  res = gl2psPrintPrimitives();
-  gl2psPrintf("</g>\n");
-  return res;
-}
-
-static void gl2psPrintSVGFinalPrimitive(void)
-{
-  /* End any remaining line, if any */
-  gl2psEndSVGLine();
-}
-
-/* definition of the SVG backend */
-
-static GL2PSbackend gl2psSVG = {
-  gl2psPrintSVGHeader,
-  gl2psPrintSVGFooter,
-  gl2psPrintSVGBeginViewport,
-  gl2psPrintSVGEndViewport,
-  gl2psPrintSVGPrimitive,
-  gl2psPrintSVGFinalPrimitive,
-  "svg",
-  "Scalable Vector Graphics"
-};
-
-/*********************************************************************
- *
- * PGF routines
- *
- *********************************************************************/
-
-static void gl2psPrintPGFColor(GL2PSrgba rgba)
-{
-  if(!gl2psSameColor(gl2ps->lastrgba, rgba)){
-    gl2psSetLastColor(rgba);
-    fprintf(gl2ps->stream, "\\color[rgb]{%f,%f,%f}\n", rgba[0], rgba[1], rgba[2]);
-  }
-}
-
-static void gl2psPrintPGFHeader(void)
-{
-  time_t now;
-
-  time(&now);
-
-  fprintf(gl2ps->stream,
-          "%% Title: %s\n"
-          "%% Creator: GL2PS %d.%d.%d%s, %s\n"
-          "%% For: %s\n"
-          "%% CreationDate: %s",
-          gl2ps->title, GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION,
-          GL2PS_PATCH_VERSION, GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT,
-          gl2ps->producer, ctime(&now));
-
-  fprintf(gl2ps->stream, "\\begin{pgfpicture}\n");
-  if(gl2ps->options & GL2PS_DRAW_BACKGROUND){
-    gl2psPrintPGFColor(gl2ps->bgcolor);
-    fprintf(gl2ps->stream,
-            "\\pgfpathrectanglecorners{"
-            "\\pgfpoint{%dpt}{%dpt}}{\\pgfpoint{%dpt}{%dpt}}\n"
-            "\\pgfusepath{fill}\n",
-            (int)gl2ps->viewport[0], (int)gl2ps->viewport[1],
-            (int)gl2ps->viewport[2], (int)gl2ps->viewport[3]);
-  }
-}
-
-static void gl2psPrintPGFDash(GLushort pattern, GLint factor)
-{
-  int i, n, array[10];
-
-  if(pattern == gl2ps->lastpattern && factor == gl2ps->lastfactor)
-    return;
-
-  gl2ps->lastpattern = pattern;
-  gl2ps->lastfactor = factor;
-
-  if(!pattern || !factor){
-    /* solid line */
-    fprintf(gl2ps->stream, "\\pgfsetdash{}{0pt}\n");
-  }
-  else{
-    gl2psParseStipplePattern(pattern, factor, &n, array);
-    fprintf(gl2ps->stream, "\\pgfsetdash{");
-    for(i = 0; i < n; i++) fprintf(gl2ps->stream, "{%dpt}", array[i]);
-    fprintf(gl2ps->stream, "}{0pt}\n");
-  }
-}
-
-static const char *gl2psPGFTextAlignment(int align)
-{
-  switch(align){
-  case GL2PS_TEXT_C  : return "center";
-  case GL2PS_TEXT_CL : return "west";
-  case GL2PS_TEXT_CR : return "east";
-  case GL2PS_TEXT_B  : return "south";
-  case GL2PS_TEXT_BR : return "south east";
-  case GL2PS_TEXT_T  : return "north";
-  case GL2PS_TEXT_TL : return "north west";
-  case GL2PS_TEXT_TR : return "north east";
-  case GL2PS_TEXT_BL :
-  default            : return "south west";
-  }
-}
-
-static void gl2psPrintPGFPrimitive(void *data)
-{
-  GL2PSprimitive *prim;
-
-  prim = *(GL2PSprimitive**)data;
-
-  switch(prim->type){
-  case GL2PS_POINT :
-    /* Points in openGL are rectangular */
-    gl2psPrintPGFColor(prim->verts[0].rgba);
-    fprintf(gl2ps->stream,
-            "\\pgfpathrectangle{\\pgfpoint{%fpt}{%fpt}}"
-            "{\\pgfpoint{%fpt}{%fpt}}\n\\pgfusepath{fill}\n",
-            prim->verts[0].xyz[0]-0.5*prim->width,
-            prim->verts[0].xyz[1]-0.5*prim->width,
-            prim->width,prim->width);
-    break;
-  case GL2PS_LINE :
-    gl2psPrintPGFColor(prim->verts[0].rgba);
-    if(gl2ps->lastlinewidth != prim->width){
-      gl2ps->lastlinewidth = prim->width;
-      fprintf(gl2ps->stream, "\\pgfsetlinewidth{%fpt}\n", gl2ps->lastlinewidth);
-    }
-    gl2psPrintPGFDash(prim->pattern, prim->factor);
-    fprintf(gl2ps->stream,
-            "\\pgfpathmoveto{\\pgfpoint{%fpt}{%fpt}}\n"
-            "\\pgflineto{\\pgfpoint{%fpt}{%fpt}}\n"
-            "\\pgfusepath{stroke}\n",
-            prim->verts[1].xyz[0], prim->verts[1].xyz[1],
-            prim->verts[0].xyz[0], prim->verts[0].xyz[1]);
-    break;
-  case GL2PS_TRIANGLE :
-    if(gl2ps->lastlinewidth != 0){
-      gl2ps->lastlinewidth = 0;
-      fprintf(gl2ps->stream, "\\pgfsetlinewidth{0.01pt}\n");
-    }
-    gl2psPrintPGFColor(prim->verts[0].rgba);
-    fprintf(gl2ps->stream,
-            "\\pgfpathmoveto{\\pgfpoint{%fpt}{%fpt}}\n"
-            "\\pgflineto{\\pgfpoint{%fpt}{%fpt}}\n"
-            "\\pgflineto{\\pgfpoint{%fpt}{%fpt}}\n"
-            "\\pgfpathclose\n"
-            "\\pgfusepath{fill,stroke}\n",
-            prim->verts[2].xyz[0], prim->verts[2].xyz[1],
-            prim->verts[1].xyz[0], prim->verts[1].xyz[1],
-            prim->verts[0].xyz[0], prim->verts[0].xyz[1]);
-    break;
-  case GL2PS_TEXT :
-    fprintf(gl2ps->stream, "{\n\\pgftransformshift{\\pgfpoint{%fpt}{%fpt}}\n",
-            prim->verts[0].xyz[0], prim->verts[0].xyz[1]);
-
-    if(prim->data.text->angle)
-      fprintf(gl2ps->stream, "\\pgftransformrotate{%f}{", prim->data.text->angle);
-
-    fprintf(gl2ps->stream, "\\pgfnode{rectangle}{%s}{\\fontsize{%d}{0}\\selectfont",
-            gl2psPGFTextAlignment(prim->data.text->alignment),
-            prim->data.text->fontsize);
-
-    fprintf(gl2ps->stream, "\\textcolor[rgb]{%g,%g,%g}{{%s}}",
-            prim->verts[0].rgba[0], prim->verts[0].rgba[1],
-            prim->verts[0].rgba[2], prim->data.text->str);
-
-    fprintf(gl2ps->stream, "}{}{\\pgfusepath{discard}}}\n");
-    break;
-  case GL2PS_SPECIAL :
-    /* alignment contains the format for which the special output text
-       is intended */
-    if (prim->data.text->alignment == GL2PS_PGF)
-      fprintf(gl2ps->stream, "%s\n", prim->data.text->str);
-    break;
-  default :
-    break;
-  }
-}
-
-static void gl2psPrintPGFFooter(void)
-{
-  fprintf(gl2ps->stream, "\\end{pgfpicture}\n");
-}
-
-static void gl2psPrintPGFBeginViewport(GLint viewport[4])
-{
-  GLint index;
-  GLfloat rgba[4];
-  int x = viewport[0], y = viewport[1], w = viewport[2], h = viewport[3];
-
-  glRenderMode(GL_FEEDBACK);
-
-  if(gl2ps->header){
-    gl2psPrintPGFHeader();
-    gl2ps->header = GL_FALSE;
-  }
-
-  fprintf(gl2ps->stream, "\\begin{pgfscope}\n");
-  if(gl2ps->options & GL2PS_DRAW_BACKGROUND){
-    if(gl2ps->colormode == GL_RGBA || gl2ps->colorsize == 0){
-      glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba);
-    }
-    else{
-      glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index);
-      rgba[0] = gl2ps->colormap[index][0];
-      rgba[1] = gl2ps->colormap[index][1];
-      rgba[2] = gl2ps->colormap[index][2];
-      rgba[3] = 1.0F;
-    }
-    gl2psPrintPGFColor(rgba);
-    fprintf(gl2ps->stream,
-            "\\pgfpathrectangle{\\pgfpoint{%dpt}{%dpt}}"
-            "{\\pgfpoint{%dpt}{%dpt}}\n"
-            "\\pgfusepath{fill}\n",
-            x, y, w, h);
-  }
-
-  fprintf(gl2ps->stream,
-          "\\pgfpathrectangle{\\pgfpoint{%dpt}{%dpt}}"
-          "{\\pgfpoint{%dpt}{%dpt}}\n"
-          "\\pgfusepath{clip}\n",
-          x, y, w, h);
-}
-
-static GLint gl2psPrintPGFEndViewport(void)
-{
-  GLint res;
-  res = gl2psPrintPrimitives();
-  fprintf(gl2ps->stream, "\\end{pgfscope}\n");
-  return res;
-}
-
-static void gl2psPrintPGFFinalPrimitive(void)
-{
-}
-
-/* definition of the PGF backend */
-
-static GL2PSbackend gl2psPGF = {
-  gl2psPrintPGFHeader,
-  gl2psPrintPGFFooter,
-  gl2psPrintPGFBeginViewport,
-  gl2psPrintPGFEndViewport,
-  gl2psPrintPGFPrimitive,
-  gl2psPrintPGFFinalPrimitive,
-  "tex",
-  "PGF Latex Graphics"
-};
-
-/*********************************************************************
- *
- * General primitive printing routine
- *
- *********************************************************************/
-
-/* Warning: the ordering of the backends must match the format
-   #defines in gl2ps.h */
-
-static GL2PSbackend *gl2psbackends[] = {
-  &gl2psPS,  /* 0 */
-  &gl2psEPS, /* 1 */
-  &gl2psTEX, /* 2 */
-  &gl2psPDF, /* 3 */
-  &gl2psSVG, /* 4 */
-  &gl2psPGF  /* 5 */
-};
-
-static void gl2psComputeTightBoundingBox(void *data)
-{
-  GL2PSprimitive *prim;
-  int i;
-
-  prim = *(GL2PSprimitive**)data;
-
-  for(i = 0; i < prim->numverts; i++){
-    if(prim->verts[i].xyz[0] < gl2ps->viewport[0])
-      gl2ps->viewport[0] = (GLint)prim->verts[i].xyz[0];
-    if(prim->verts[i].xyz[0] > gl2ps->viewport[2])
-      gl2ps->viewport[2] = (GLint)(prim->verts[i].xyz[0] + 0.5F);
-    if(prim->verts[i].xyz[1] < gl2ps->viewport[1])
-      gl2ps->viewport[1] = (GLint)prim->verts[i].xyz[1];
-    if(prim->verts[i].xyz[1] > gl2ps->viewport[3])
-      gl2ps->viewport[3] = (GLint)(prim->verts[i].xyz[1] + 0.5F);
-  }
-}
-
-static GLint gl2psPrintPrimitives(void)
-{
-  GL2PSbsptree *root;
-  GL2PSxyz eye = {0.0F, 0.0F, 100.0F * GL2PS_ZSCALE};
-  GLint used;
-
-  used = glRenderMode(GL_RENDER);
-
-  if(used < 0){
-    gl2psMsg(GL2PS_INFO, "OpenGL feedback buffer overflow");
-    return GL2PS_OVERFLOW;
-  }
-
-  if(used > 0)
-    gl2psParseFeedbackBuffer(used);
-
-  gl2psRescaleAndOffset();
-
-  if(gl2ps->header){
-    if(gl2psListNbr(gl2ps->primitives) &&
-       (gl2ps->options & GL2PS_TIGHT_BOUNDING_BOX)){
-      gl2ps->viewport[0] = gl2ps->viewport[1] = 100000;
-      gl2ps->viewport[2] = gl2ps->viewport[3] = -100000;
-      gl2psListAction(gl2ps->primitives, gl2psComputeTightBoundingBox);
-    }
-    (gl2psbackends[gl2ps->format]->printHeader)();
-    gl2ps->header = GL_FALSE;
-  }
-
-  if(!gl2psListNbr(gl2ps->primitives)){
-    /* empty feedback buffer and/or nothing else to print */
-    return GL2PS_NO_FEEDBACK;
-  }
-
-  switch(gl2ps->sort){
-  case GL2PS_NO_SORT :
-    gl2psListAction(gl2ps->primitives, gl2psbackends[gl2ps->format]->printPrimitive);
-    gl2psListAction(gl2ps->primitives, gl2psFreePrimitive);
-    /* reset the primitive list, waiting for the next viewport */
-    gl2psListReset(gl2ps->primitives);
-    break;
-  case GL2PS_SIMPLE_SORT :
-    gl2psListSort(gl2ps->primitives, gl2psCompareDepth);
-    if(gl2ps->options & GL2PS_OCCLUSION_CULL){
-      gl2psListActionInverse(gl2ps->primitives, gl2psAddInImageTree);
-      gl2psFreeBspImageTree(&gl2ps->imagetree);
-    }
-    gl2psListAction(gl2ps->primitives, gl2psbackends[gl2ps->format]->printPrimitive);
-    gl2psListAction(gl2ps->primitives, gl2psFreePrimitive);
-    /* reset the primitive list, waiting for the next viewport */
-    gl2psListReset(gl2ps->primitives);
-    break;
-  case GL2PS_BSP_SORT :
-    root = (GL2PSbsptree*)gl2psMalloc(sizeof(GL2PSbsptree));
-    gl2psBuildBspTree(root, gl2ps->primitives);
-    if(GL_TRUE == gl2ps->boundary) gl2psBuildPolygonBoundary(root);
-    if(gl2ps->options & GL2PS_OCCLUSION_CULL){
-      gl2psTraverseBspTree(root, eye, -GL2PS_EPSILON, gl2psLess,
-                           gl2psAddInImageTree, 1);
-      gl2psFreeBspImageTree(&gl2ps->imagetree);
-    }
-    gl2psTraverseBspTree(root, eye, GL2PS_EPSILON, gl2psGreater,
-                         gl2psbackends[gl2ps->format]->printPrimitive, 0);
-    gl2psFreeBspTree(&root);
-    /* reallocate the primitive list (it's been deleted by
-       gl2psBuildBspTree) in case there is another viewport */
-    gl2ps->primitives = gl2psListCreate(500, 500, sizeof(GL2PSprimitive*));
-    break;
-  }
-  gl2psbackends[gl2ps->format]->printFinalPrimitive();
-
-  return GL2PS_SUCCESS;
-}
-
-/*********************************************************************
- *
- * Public routines
- *
- *********************************************************************/
-
-GL2PSDLL_API GLint gl2psBeginPage(const char *title, const char *producer,
-                                  GLint viewport[4], GLint format, GLint sort,
-                                  GLint options, GLint colormode,
-                                  GLint colorsize, GL2PSrgba *colormap,
-                                  GLint nr, GLint ng, GLint nb, GLint buffersize,
-                                  FILE *stream, const char *filename)
-{
-  GLint index;
-  int i;
-
-  if(gl2ps){
-    gl2psMsg(GL2PS_ERROR, "gl2psBeginPage called in wrong program state");
-    return GL2PS_ERROR;
-  }
-
-  gl2ps = (GL2PScontext*)gl2psMalloc(sizeof(GL2PScontext));
-
-  if(format >= 0 && format < (GLint)(sizeof(gl2psbackends) / sizeof(gl2psbackends[0]))){
-    gl2ps->format = format;
-  }
-  else {
-    gl2psMsg(GL2PS_ERROR, "Unknown output format: %d", format);
-    gl2psFree(gl2ps);
-    gl2ps = NULL;
-    return GL2PS_ERROR;
-  }
-
-  switch(sort){
-  case GL2PS_NO_SORT :
-  case GL2PS_SIMPLE_SORT :
-  case GL2PS_BSP_SORT :
-    gl2ps->sort = sort;
-    break;
-  default :
-    gl2psMsg(GL2PS_ERROR, "Unknown sorting algorithm: %d", sort);
-    gl2psFree(gl2ps);
-    gl2ps = NULL;
-    return GL2PS_ERROR;
-  }
-
-  if(stream){
-    gl2ps->stream = stream;
-  }
-  else{
-    gl2psMsg(GL2PS_ERROR, "Bad file pointer");
-    gl2psFree(gl2ps);
-    gl2ps = NULL;
-    return GL2PS_ERROR;
-  }
-
-  gl2ps->header = GL_TRUE;
-  gl2ps->maxbestroot = 10;
-  gl2ps->options = options;
-  gl2ps->compress = NULL;
-  gl2ps->imagemap_head = NULL;
-  gl2ps->imagemap_tail = NULL;
-
-  if(gl2ps->options & GL2PS_USE_CURRENT_VIEWPORT){
-    glGetIntegerv(GL_VIEWPORT, gl2ps->viewport);
-  }
-  else{
-    for(i = 0; i < 4; i++){
-      gl2ps->viewport[i] = viewport[i];
-    }
-  }
-
-  if(!gl2ps->viewport[2] || !gl2ps->viewport[3]){
-    gl2psMsg(GL2PS_ERROR, "Incorrect viewport (x=%d, y=%d, width=%d, height=%d)",
-             gl2ps->viewport[0], gl2ps->viewport[1],
-             gl2ps->viewport[2], gl2ps->viewport[3]);
-    gl2psFree(gl2ps);
-    gl2ps = NULL;
-    return GL2PS_ERROR;
-  }
-
-  gl2ps->threshold[0] = nr ? 1.0F / (GLfloat)nr : 0.064F;
-  gl2ps->threshold[1] = ng ? 1.0F / (GLfloat)ng : 0.034F;
-  gl2ps->threshold[2] = nb ? 1.0F / (GLfloat)nb : 0.100F;
-  gl2ps->colormode = colormode;
-  gl2ps->buffersize = buffersize > 0 ? buffersize : 2048 * 2048;
-  for(i = 0; i < 3; i++){
-    gl2ps->lastvertex.xyz[i] = -1.0F;
-  }
-  for(i = 0; i < 4; i++){
-    gl2ps->lastvertex.rgba[i] = -1.0F;
-    gl2ps->lastrgba[i] = -1.0F;
-  }
-  gl2ps->lastlinewidth = -1.0F;
-  gl2ps->lastpattern = 0;
-  gl2ps->lastfactor = 0;
-  gl2ps->imagetree = NULL;
-  gl2ps->primitivetoadd = NULL;
-  gl2ps->zerosurfacearea = GL_FALSE;
-  gl2ps->pdfprimlist = NULL;
-  gl2ps->pdfgrouplist = NULL;
-  gl2ps->xreflist = NULL;
-
-  /* get default blending mode from current OpenGL state (enabled by
-     default for SVG) */
-  gl2ps->blending = (gl2ps->format == GL2PS_SVG) ? GL_TRUE : glIsEnabled(GL_BLEND);
-  glGetIntegerv(GL_BLEND_SRC, &gl2ps->blendfunc[0]);
-  glGetIntegerv(GL_BLEND_DST, &gl2ps->blendfunc[1]);
-
-  if(gl2ps->colormode == GL_RGBA){
-    gl2ps->colorsize = 0;
-    gl2ps->colormap = NULL;
-    glGetFloatv(GL_COLOR_CLEAR_VALUE, gl2ps->bgcolor);
-  }
-  else if(gl2ps->colormode == GL_COLOR_INDEX){
-    if(!colorsize || !colormap){
-      gl2psMsg(GL2PS_ERROR, "Missing colormap for GL_COLOR_INDEX rendering");
-      gl2psFree(gl2ps);
-      gl2ps = NULL;
-      return GL2PS_ERROR;
-    }
-    gl2ps->colorsize = colorsize;
-    gl2ps->colormap = (GL2PSrgba*)gl2psMalloc(gl2ps->colorsize * sizeof(GL2PSrgba));
-    memcpy(gl2ps->colormap, colormap, gl2ps->colorsize * sizeof(GL2PSrgba));
-    glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index);
-    gl2ps->bgcolor[0] = gl2ps->colormap[index][0];
-    gl2ps->bgcolor[1] = gl2ps->colormap[index][1];
-    gl2ps->bgcolor[2] = gl2ps->colormap[index][2];
-    gl2ps->bgcolor[3] = 1.0F;
-  }
-  else{
-    gl2psMsg(GL2PS_ERROR, "Unknown color mode in gl2psBeginPage");
-    gl2psFree(gl2ps);
-    gl2ps = NULL;
-    return GL2PS_ERROR;
-  }
-
-  if(!title){
-    gl2ps->title = (char*)gl2psMalloc(sizeof(char));
-    gl2ps->title[0] = '\0';
-  }
-  else{
-    gl2ps->title = (char*)gl2psMalloc((strlen(title)+1)*sizeof(char));
-    strcpy(gl2ps->title, title);
-  }
-
-  if(!producer){
-    gl2ps->producer = (char*)gl2psMalloc(sizeof(char));
-    gl2ps->producer[0] = '\0';
-  }
-  else{
-    gl2ps->producer = (char*)gl2psMalloc((strlen(producer)+1)*sizeof(char));
-    strcpy(gl2ps->producer, producer);
-  }
-
-  if(!filename){
-    gl2ps->filename = (char*)gl2psMalloc(sizeof(char));
-    gl2ps->filename[0] = '\0';
-  }
-  else{
-    gl2ps->filename = (char*)gl2psMalloc((strlen(filename)+1)*sizeof(char));
-    strcpy(gl2ps->filename, filename);
-  }
-
-  gl2ps->primitives = gl2psListCreate(500, 500, sizeof(GL2PSprimitive*));
-  gl2ps->auxprimitives = gl2psListCreate(100, 100, sizeof(GL2PSprimitive*));
-  gl2ps->feedback = (GLfloat*)gl2psMalloc(gl2ps->buffersize * sizeof(GLfloat));
-  glFeedbackBuffer(gl2ps->buffersize, GL_3D_COLOR, gl2ps->feedback);
-  glRenderMode(GL_FEEDBACK);
-
-  return GL2PS_SUCCESS;
-}
-
-GL2PSDLL_API GLint gl2psEndPage(void)
-{
-  GLint res;
-
-  if(!gl2ps) return GL2PS_UNINITIALIZED;
-
-  res = gl2psPrintPrimitives();
-
-  if(res != GL2PS_OVERFLOW)
-    (gl2psbackends[gl2ps->format]->printFooter)();
-
-  fflush(gl2ps->stream);
-
-  gl2psListDelete(gl2ps->primitives);
-  gl2psListDelete(gl2ps->auxprimitives);
-  gl2psFreeImagemap(gl2ps->imagemap_head);
-  gl2psFree(gl2ps->colormap);
-  gl2psFree(gl2ps->title);
-  gl2psFree(gl2ps->producer);
-  gl2psFree(gl2ps->filename);
-  gl2psFree(gl2ps->feedback);
-  gl2psFree(gl2ps);
-  gl2ps = NULL;
-
-  return res;
-}
-
-GL2PSDLL_API GLint gl2psBeginViewport(GLint viewport[4])
-{
-  if(!gl2ps) return GL2PS_UNINITIALIZED;
-
-  (gl2psbackends[gl2ps->format]->beginViewport)(viewport);
-
-  return GL2PS_SUCCESS;
-}
-
-GL2PSDLL_API GLint gl2psEndViewport(void)
-{
-  GLint res;
-
-  if(!gl2ps) return GL2PS_UNINITIALIZED;
-
-  res = (gl2psbackends[gl2ps->format]->endViewport)();
-
-  /* reset last used colors, line widths */
-  gl2ps->lastlinewidth = -1.0F;
-
-  return res;
-}
-
-GL2PSDLL_API GLint gl2psTextOpt(const char *str, const char *fontname,
-                                GLshort fontsize, GLint alignment, GLfloat angle)
-{
-  return gl2psAddText(GL2PS_TEXT, str, fontname, fontsize, alignment, angle);
-}
-
-GL2PSDLL_API GLint gl2psText(const char *str, const char *fontname, GLshort fontsize)
-{
-  return gl2psAddText(GL2PS_TEXT, str, fontname, fontsize, GL2PS_TEXT_BL, 0.0F);
-}
-
-GL2PSDLL_API GLint gl2psSpecial(GLint format, const char *str)
-{
-  return gl2psAddText(GL2PS_SPECIAL, str, "", 0, format, 0.0F);
-}
-
-GL2PSDLL_API GLint gl2psDrawPixels(GLsizei width, GLsizei height,
-                                   GLint xorig, GLint yorig,
-                                   GLenum format, GLenum type,
-                                   const void *pixels)
-{
-  int size, i;
-  const GLfloat *piv;
-  GLfloat pos[4], zoom_x, zoom_y;
-  GL2PSprimitive *prim;
-  GLboolean valid;
-
-  if(!gl2ps || !pixels) return GL2PS_UNINITIALIZED;
-
-  if((width <= 0) || (height <= 0)) return GL2PS_ERROR;
-
-  if(gl2ps->options & GL2PS_NO_PIXMAP) return GL2PS_SUCCESS;
-
-  if((format != GL_RGB && format != GL_RGBA) || type != GL_FLOAT){
-    gl2psMsg(GL2PS_ERROR, "gl2psDrawPixels only implemented for "
-             "GL_RGB/GL_RGBA, GL_FLOAT pixels");
-    return GL2PS_ERROR;
-  }
-
-  glGetBooleanv(GL_CURRENT_RASTER_POSITION_VALID, &valid);
-  if(GL_FALSE == valid) return GL2PS_SUCCESS; /* the primitive is culled */
-
-  glGetFloatv(GL_CURRENT_RASTER_POSITION, pos);
-  glGetFloatv(GL_ZOOM_X, &zoom_x);
-  glGetFloatv(GL_ZOOM_Y, &zoom_y);
-
-  prim = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive));
-  prim->type = GL2PS_PIXMAP;
-  prim->boundary = 0;
-  prim->numverts = 1;
-  prim->verts = (GL2PSvertex*)gl2psMalloc(sizeof(GL2PSvertex));
-  prim->verts[0].xyz[0] = pos[0] + xorig;
-  prim->verts[0].xyz[1] = pos[1] + yorig;
-  prim->verts[0].xyz[2] = pos[2];
-  prim->culled = 0;
-  prim->offset = 0;
-  prim->pattern = 0;
-  prim->factor = 0;
-  prim->width = 1;
-  glGetFloatv(GL_CURRENT_RASTER_COLOR, prim->verts[0].rgba);
-  prim->data.image = (GL2PSimage*)gl2psMalloc(sizeof(GL2PSimage));
-  prim->data.image->width = width;
-  prim->data.image->height = height;
-  prim->data.image->zoom_x = zoom_x;
-  prim->data.image->zoom_y = zoom_y;
-  prim->data.image->format = format;
-  prim->data.image->type = type;
-
-  switch(format){
-  case GL_RGBA:
-    if(gl2ps->options & GL2PS_NO_BLENDING || !gl2ps->blending){
-      /* special case: blending turned off */
-      prim->data.image->format = GL_RGB;
-      size = height * width * 3;
-      prim->data.image->pixels = (GLfloat*)gl2psMalloc(size * sizeof(GLfloat));
-      piv = (const GLfloat*)pixels;
-      for(i = 0; i < size; ++i, ++piv){
-        prim->data.image->pixels[i] = *piv;
-        if(!((i + 1) % 3))
-          ++piv;
-      }
-    }
-    else{
-      size = height * width * 4;
-      prim->data.image->pixels = (GLfloat*)gl2psMalloc(size * sizeof(GLfloat));
-      memcpy(prim->data.image->pixels, pixels, size * sizeof(GLfloat));
-    }
-    break;
-  case GL_RGB:
-  default:
-    size = height * width * 3;
-    prim->data.image->pixels = (GLfloat*)gl2psMalloc(size * sizeof(GLfloat));
-    memcpy(prim->data.image->pixels, pixels, size * sizeof(GLfloat));
-    break;
-  }
-
-  gl2psListAdd(gl2ps->auxprimitives, &prim);
-  glPassThrough(GL2PS_DRAW_PIXELS_TOKEN);
-
-  return GL2PS_SUCCESS;
-}
-
-GL2PSDLL_API GLint gl2psDrawImageMap(GLsizei width, GLsizei height,
-                                     const GLfloat position[3],
-                                     const unsigned char *imagemap){
-  int size, i;
-  int sizeoffloat = sizeof(GLfloat);
-
-  if(!gl2ps || !imagemap) return GL2PS_UNINITIALIZED;
-
-  if((width <= 0) || (height <= 0)) return GL2PS_ERROR;
-
-  size = height + height * ((width - 1) / 8);
-  glPassThrough(GL2PS_IMAGEMAP_TOKEN);
-  glBegin(GL_POINTS);
-  glVertex3f(position[0], position[1],position[2]);
-  glEnd();
-  glPassThrough((GLfloat)width);
-  glPassThrough((GLfloat)height);
-  for(i = 0; i < size; i += sizeoffloat){
-    const float *value = (const float*)imagemap;
-    glPassThrough(*value);
-    imagemap += sizeoffloat;
-  }
-  return GL2PS_SUCCESS;
-}
-
-GL2PSDLL_API GLint gl2psEnable(GLint mode)
-{
-  GLint tmp;
-
-  if(!gl2ps) return GL2PS_UNINITIALIZED;
-
-  switch(mode){
-  case GL2PS_POLYGON_OFFSET_FILL :
-    glPassThrough(GL2PS_BEGIN_OFFSET_TOKEN);
-    glGetFloatv(GL_POLYGON_OFFSET_FACTOR, &gl2ps->offset[0]);
-    glGetFloatv(GL_POLYGON_OFFSET_UNITS, &gl2ps->offset[1]);
-    break;
-  case GL2PS_POLYGON_BOUNDARY :
-    glPassThrough(GL2PS_BEGIN_BOUNDARY_TOKEN);
-    break;
-  case GL2PS_LINE_STIPPLE :
-    glPassThrough(GL2PS_BEGIN_STIPPLE_TOKEN);
-    glGetIntegerv(GL_LINE_STIPPLE_PATTERN, &tmp);
-    glPassThrough((GLfloat)tmp);
-    glGetIntegerv(GL_LINE_STIPPLE_REPEAT, &tmp);
-    glPassThrough((GLfloat)tmp);
-    break;
-  case GL2PS_BLEND :
-    glPassThrough(GL2PS_BEGIN_BLEND_TOKEN);
-    break;
-  default :
-    gl2psMsg(GL2PS_WARNING, "Unknown mode in gl2psEnable: %d", mode);
-    return GL2PS_WARNING;
-  }
-
-  return GL2PS_SUCCESS;
-}
-
-GL2PSDLL_API GLint gl2psDisable(GLint mode)
-{
-  if(!gl2ps) return GL2PS_UNINITIALIZED;
-
-  switch(mode){
-  case GL2PS_POLYGON_OFFSET_FILL :
-    glPassThrough(GL2PS_END_OFFSET_TOKEN);
-    break;
-  case GL2PS_POLYGON_BOUNDARY :
-    glPassThrough(GL2PS_END_BOUNDARY_TOKEN);
-    break;
-  case GL2PS_LINE_STIPPLE :
-    glPassThrough(GL2PS_END_STIPPLE_TOKEN);
-    break;
-  case GL2PS_BLEND :
-    glPassThrough(GL2PS_END_BLEND_TOKEN);
-    break;
-  default :
-    gl2psMsg(GL2PS_WARNING, "Unknown mode in gl2psDisable: %d", mode);
-    return GL2PS_WARNING;
-  }
-
-  return GL2PS_SUCCESS;
-}
-
-GL2PSDLL_API GLint gl2psPointSize(GLfloat value)
-{
-  if(!gl2ps) return GL2PS_UNINITIALIZED;
-
-  glPassThrough(GL2PS_POINT_SIZE_TOKEN);
-  glPassThrough(value);
-
-  return GL2PS_SUCCESS;
-}
-
-GL2PSDLL_API GLint gl2psLineWidth(GLfloat value)
-{
-  if(!gl2ps) return GL2PS_UNINITIALIZED;
-
-  glPassThrough(GL2PS_LINE_WIDTH_TOKEN);
-  glPassThrough(value);
-
-  return GL2PS_SUCCESS;
-}
-
-GL2PSDLL_API GLint gl2psBlendFunc(GLenum sfactor, GLenum dfactor)
-{
-  if(!gl2ps) return GL2PS_UNINITIALIZED;
-
-  if(GL_FALSE == gl2psSupportedBlendMode(sfactor, dfactor))
-    return GL2PS_WARNING;
-
-  glPassThrough(GL2PS_SRC_BLEND_TOKEN);
-  glPassThrough((GLfloat)sfactor);
-  glPassThrough(GL2PS_DST_BLEND_TOKEN);
-  glPassThrough((GLfloat)dfactor);
-
-  return GL2PS_SUCCESS;
-}
-
-GL2PSDLL_API GLint gl2psSetOptions(GLint options)
-{
-  if(!gl2ps) return GL2PS_UNINITIALIZED;
-
-  gl2ps->options = options;
-
-  return GL2PS_SUCCESS;
-}
-
-GL2PSDLL_API GLint gl2psGetOptions(GLint *options)
-{
-  if(!gl2ps) {
-    *options = 0;
-    return GL2PS_UNINITIALIZED;
-  }
-
-  *options = gl2ps->options;
-
-  return GL2PS_SUCCESS;
-}
-
-GL2PSDLL_API const char *gl2psGetFileExtension(GLint format)
-{
-  if(format >= 0 && format < (GLint)(sizeof(gl2psbackends) / sizeof(gl2psbackends[0])))
-    return gl2psbackends[format]->file_extension;
-  else
-    return "Unknown format";
-}
-
-GL2PSDLL_API const char *gl2psGetFormatDescription(GLint format)
-{
-  if(format >= 0 && format < (GLint)(sizeof(gl2psbackends) / sizeof(gl2psbackends[0])))
-    return gl2psbackends[format]->description;
-  else
-    return "Unknown format";
-}
diff -r 6b51f5f44aea -r 06a850f83dd4 libinterp/corefcn/gl2ps.h
--- a/libinterp/corefcn/gl2ps.h	Tue Oct 29 16:29:46 2013 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,200 +0,0 @@
-/*
- * GL2PS, an OpenGL to PostScript Printing Library
- * Copyright (C) 1999-2011 C. Geuzaine
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of either:
- *
- * a) the GNU Library General Public License as published by the Free
- * Software Foundation, either version 2 of the License, or (at your
- * option) any later version; or
- *
- * b) the GL2PS License as published by Christophe Geuzaine, either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See either
- * the GNU Library General Public License or the GL2PS License for
- * more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library in the file named "COPYING.LGPL";
- * if not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- * Cambridge, MA 02139, USA.
- *
- * You should have received a copy of the GL2PS License with this
- * library in the file named "COPYING.GL2PS"; if not, I will be glad
- * to provide one.
- *
- * For the latest info about gl2ps and a full list of contributors,
- * see http://www.geuz.org/gl2ps/.
- *
- * Please report all bugs and problems to <gl2ps@geuz.org>.
- */
-
-#ifndef __GL2PS_H__
-#define __GL2PS_H__
-
-#include <stdio.h>
-#include <stdlib.h>
-
-/* Define GL2PSDLL at compile time to build a Windows DLL */
-
-#if defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__)
-#  if defined(_MSC_VER)
-#    pragma warning(disable:4115)
-#    pragma warning(disable:4996)
-#  endif
-#  define WIN32_LEAN_AND_MEAN
-#  include <windows.h>
-#  if defined(GL2PSDLL)
-#    if defined(GL2PSDLL_EXPORTS)
-#      define GL2PSDLL_API __declspec(dllexport)
-#    else
-#      define GL2PSDLL_API __declspec(dllimport)
-#    endif
-#  else
-#    define GL2PSDLL_API
-#  endif
-#else
-#  define GL2PSDLL_API
-#endif
-
-#if defined(__APPLE__) || defined(HAVE_OPENGL_GL_H)
-#  include <OpenGL/gl.h>
-#else
-#  include <GL/gl.h>
-#endif
-
-/* Support for compressed PostScript/PDF/SVG and for embedded PNG
-   images in SVG */
-
-#if defined(HAVE_ZLIB) || defined(HAVE_LIBZ)
-#  define GL2PS_HAVE_ZLIB
-#  if defined(HAVE_LIBPNG) || defined(HAVE_PNG)
-#    define GL2PS_HAVE_LIBPNG
-#  endif
-#endif
-
-/* Version number */
-
-#define GL2PS_MAJOR_VERSION 1
-#define GL2PS_MINOR_VERSION 3
-#define GL2PS_PATCH_VERSION 6
-#define GL2PS_EXTRA_VERSION ""
-
-#define GL2PS_VERSION (GL2PS_MAJOR_VERSION + \
-                       0.01 * GL2PS_MINOR_VERSION + \
-                       0.0001 * GL2PS_PATCH_VERSION)
-
-#define GL2PS_COPYRIGHT "(C) 1999-2011 C. Geuzaine"
-
-/* Output file formats (the values and the ordering are important!) */
-
-#define GL2PS_PS  0
-#define GL2PS_EPS 1
-#define GL2PS_TEX 2
-#define GL2PS_PDF 3
-#define GL2PS_SVG 4
-#define GL2PS_PGF 5
-
-/* Sorting algorithms */
-
-#define GL2PS_NO_SORT     1
-#define GL2PS_SIMPLE_SORT 2
-#define GL2PS_BSP_SORT    3
-
-/* Message levels and error codes */
-
-#define GL2PS_SUCCESS       0
-#define GL2PS_INFO          1
-#define GL2PS_WARNING       2
-#define GL2PS_ERROR         3
-#define GL2PS_NO_FEEDBACK   4
-#define GL2PS_OVERFLOW      5
-#define GL2PS_UNINITIALIZED 6
-
-/* Options for gl2psBeginPage */
-
-#define GL2PS_NONE                 0
-#define GL2PS_DRAW_BACKGROUND      (1<<0)
-#define GL2PS_SIMPLE_LINE_OFFSET   (1<<1)
-#define GL2PS_SILENT               (1<<2)
-#define GL2PS_BEST_ROOT            (1<<3)
-#define GL2PS_OCCLUSION_CULL       (1<<4)
-#define GL2PS_NO_TEXT              (1<<5)
-#define GL2PS_LANDSCAPE            (1<<6)
-#define GL2PS_NO_PS3_SHADING       (1<<7)
-#define GL2PS_NO_PIXMAP            (1<<8)
-#define GL2PS_USE_CURRENT_VIEWPORT (1<<9)
-#define GL2PS_COMPRESS             (1<<10)
-#define GL2PS_NO_BLENDING          (1<<11)
-#define GL2PS_TIGHT_BOUNDING_BOX   (1<<12)
-
-/* Arguments for gl2psEnable/gl2psDisable */
-
-#define GL2PS_POLYGON_OFFSET_FILL 1
-#define GL2PS_POLYGON_BOUNDARY    2
-#define GL2PS_LINE_STIPPLE        3
-#define GL2PS_BLEND               4
-
-/* Text alignment (o=raster position; default mode is BL):
-   +---+ +---+ +---+ +---+ +---+ +---+ +-o-+ o---+ +---o
-   | o | o   | |   o |   | |   | |   | |   | |   | |   |
-   +---+ +---+ +---+ +-o-+ o---+ +---o +---+ +---+ +---+
-    C     CL    CR    B     BL    BR    T     TL    TR */
-
-#define GL2PS_TEXT_C  1
-#define GL2PS_TEXT_CL 2
-#define GL2PS_TEXT_CR 3
-#define GL2PS_TEXT_B  4
-#define GL2PS_TEXT_BL 5
-#define GL2PS_TEXT_BR 6
-#define GL2PS_TEXT_T  7
-#define GL2PS_TEXT_TL 8
-#define GL2PS_TEXT_TR 9
-
-typedef GLfloat GL2PSrgba[4];
-
-#if defined(__cplusplus)
-extern "C" {
-#endif
-
-GL2PSDLL_API GLint gl2psBeginPage(const char *title, const char *producer,
-                                  GLint viewport[4], GLint format, GLint sort,
-                                  GLint options, GLint colormode,
-                                  GLint colorsize, GL2PSrgba *colormap,
-                                  GLint nr, GLint ng, GLint nb, GLint buffersize,
-                                  FILE *stream, const char *filename);
-GL2PSDLL_API GLint gl2psEndPage(void);
-GL2PSDLL_API GLint gl2psSetOptions(GLint options);
-GL2PSDLL_API GLint gl2psGetOptions(GLint *options);
-GL2PSDLL_API GLint gl2psBeginViewport(GLint viewport[4]);
-GL2PSDLL_API GLint gl2psEndViewport(void);
-GL2PSDLL_API GLint gl2psText(const char *str, const char *fontname,
-                             GLshort fontsize);
-GL2PSDLL_API GLint gl2psTextOpt(const char *str, const char *fontname,
-                                GLshort fontsize, GLint align, GLfloat angle);
-GL2PSDLL_API GLint gl2psSpecial(GLint format, const char *str);
-GL2PSDLL_API GLint gl2psDrawPixels(GLsizei width, GLsizei height,
-                                   GLint xorig, GLint yorig,
-                                   GLenum format, GLenum type, const void *pixels);
-GL2PSDLL_API GLint gl2psEnable(GLint mode);
-GL2PSDLL_API GLint gl2psDisable(GLint mode);
-GL2PSDLL_API GLint gl2psPointSize(GLfloat value);
-GL2PSDLL_API GLint gl2psLineWidth(GLfloat value);
-GL2PSDLL_API GLint gl2psBlendFunc(GLenum sfactor, GLenum dfactor);
-
-/* undocumented */
-GL2PSDLL_API GLint gl2psDrawImageMap(GLsizei width, GLsizei height,
-                                     const GLfloat position[3],
-                                     const unsigned char *imagemap);
-GL2PSDLL_API const char *gl2psGetFileExtension(GLint format);
-GL2PSDLL_API const char *gl2psGetFormatDescription(GLint format);
-
-#if defined(__cplusplus)
-}
-#endif
-
-#endif /* __GL2PS_H__ */
diff -r 6b51f5f44aea -r 06a850f83dd4 libinterp/corefcn/module.mk
--- a/libinterp/corefcn/module.mk	Tue Oct 29 16:29:46 2013 -0400
+++ b/libinterp/corefcn/module.mk	Tue Oct 29 15:16:23 2013 -0700
@@ -1,7 +1,6 @@
 EXTRA_DIST += \
   corefcn/module.mk \
   corefcn/defaults.in.h \
-  corefcn/gl2ps.c \
   corefcn/graphics.in.h \
   corefcn/mxarray.in.h \
   corefcn/oct-errno.in.cc \
@@ -60,7 +59,6 @@
   corefcn/file-io.h \
   corefcn/gl-render.h \
   corefcn/gl2ps-renderer.h \
-  corefcn/gl2ps.h \
   corefcn/gripes.h \
   corefcn/help.h \
   corefcn/hook-fcn.h \
@@ -130,8 +128,7 @@
 C_COREFCN_SRC = \
   corefcn/cutils.c \
   corefcn/matherr.c \
-  corefcn/siglist.c \
-  corefcn/xgl2ps.c
+  corefcn/siglist.c
 
 COREFCN_SRC = \
   corefcn/Cell.cc \
diff -r 6b51f5f44aea -r 06a850f83dd4 libinterp/dldfcn/__init_fltk__.cc
--- a/libinterp/dldfcn/__init_fltk__.cc	Tue Oct 29 16:29:46 2013 -0400
+++ b/libinterp/dldfcn/__init_fltk__.cc	Tue Oct 29 15:16:23 2013 -0700
@@ -180,6 +180,7 @@
 
     if (print_mode)
       {
+#ifdef HAVE_GL2PS_H
         FILE *fp = octave_popen (print_cmd.c_str (), "w");
         glps_renderer rend (fp, print_term);
 
@@ -187,6 +188,11 @@
 
         octave_pclose (fp);
         print_mode = false;
+#else
+        print_mode = false;
+        error ("fltk: printing not available without gl2ps library");
+        return;
+#endif
       }
     else
       {
diff -r 6b51f5f44aea -r 06a850f83dd4 libinterp/link-deps.mk
--- a/libinterp/link-deps.mk	Tue Oct 29 16:29:46 2013 -0400
+++ b/libinterp/link-deps.mk	Tue Oct 29 15:16:23 2013 -0700
@@ -15,6 +15,7 @@
   $(OPENGL_LIBS) \
   $(X11_LIBS) \
   $(CARBON_LIBS) \
+  $(GL2PS_LIBS) \
   $(LLVM_LIBS) \
   $(JAVA_LIBS) \
   $(LAPACK_LIBS)