From f3a31c417244d5376541f5cceca30f213c54bb8e Mon Sep 17 00:00:00 2001
From: Hib Eris <hib@hiberis.nl>
Date: Wed, 30 Dec 2009 09:59:00 +0100
Subject: [PATCH] Make poppler (optionally) relocatable on Windows

---
 configure.ac            |   26 +++++++++++++++++++++
 poppler/GlobalParams.cc |   57 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 83 insertions(+), 0 deletions(-)

diff --git a/configure.ac b/configure.ac
index 0ae6dd5..14fce0b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -72,6 +72,32 @@ AC_ARG_ENABLE(fixedpoint,
 [  --enable-fixedpoint     use fixed point (instead of floating point) arithmetic],
 AC_DEFINE(USE_FIXEDPOINT, [1], [Use fixed point arithmetic]))
 
+dnl Relocation support
+AC_ARG_ENABLE(relocatable,
+    AC_HELP_STRING([--disable-relocatable],
+                   [Hardcode the poppler library location (on Windows).]),
+    enable_relocatable=$enableval,
+    [if test x$os_win32 = xyes; then
+         # default to yes on native Windows.
+         enable_relocatable="yes"
+     else
+         # default to no everywhere else.
+         enable_relocatable="no"
+     fi
+    ]
+)
+
+if test x$enable_relocatable = xyes; then
+    if test x$os_win32 = xyes; then
+     AC_DEFINE([ENABLE_RELOCATABLE],
+               [1],[Do not hardcode the library location])
+    else
+        AC_MSG_ERROR(
+               [Invalid setting for relocatable, only supported on windows])
+
+    fi
+fi
+
 AC_DEFINE_DIR(POPPLER_DATADIR, "{datarootdir}/poppler", [Poppler data dir])
 
 dnl ##### Checks for header files.
diff --git a/poppler/GlobalParams.cc b/poppler/GlobalParams.cc
index eda0a34..928123d 100644
--- a/poppler/GlobalParams.cc
+++ b/poppler/GlobalParams.cc
@@ -44,6 +44,7 @@
 #endif
 #ifdef _WIN32
 #  include <shlobj.h>
+#  include <mbstring.h>
 #endif
 #include "goo/gmem.h"
 #include "goo/GooString.h"
@@ -140,6 +141,62 @@ DisplayFontParam::~DisplayFontParam() {
   }
 }
 
+#if ENABLE_RELOCATABLE && defined(_WIN32)
+
+/* search for data relative to where we are installed */
+
+static HMODULE hmodule;
+
+extern "C" {
+BOOL WINAPI
+DllMain (HINSTANCE hinstDLL,
+	 DWORD     fdwReason,
+	 LPVOID    lpvReserved)
+{
+  switch (fdwReason)
+    {
+    case DLL_PROCESS_ATTACH:
+      hmodule = hinstDLL;
+      break;
+    }
+
+  return TRUE;
+}
+}
+
+static char *
+get_poppler_datadir (void)
+{
+  static char retval[_MAX_PATH];
+  static int beenhere = 0;
+
+  unsigned char *p;
+
+  if (beenhere)
+    return retval;
+
+  if (!GetModuleFileName (hmodule, (CHAR *) retval, sizeof(retval) - 20))
+    return POPPLER_DATADIR;
+
+  p = _mbsrchr ((const unsigned char *) retval, '\\');
+  *p = '\0';
+  p = _mbsrchr ((const unsigned char *) retval, '\\');
+  if (p) {
+    if (stricmp ((const char *) (p+1), "bin") == 0)
+      *p = '\0';
+  }
+  strcat (retval, "\\share\\poppler");
+
+  beenhere = 1;
+
+  return retval;
+}
+
+#undef POPPLER_DATADIR
+#define POPPLER_DATADIR get_poppler_datadir ()
+
+#endif
+
 #ifdef _WIN32
 
 //------------------------------------------------------------------------
-- 
1.6.0.4