6 files changed, 38 insertions, 8 deletions
diff --git a/Build/source/texk/web2c/pdftexdir/ChangeLog b/Build/source/texk/web2c/pdftexdir/ChangeLog
index bee0ed4b5f8..e528c30f958 100644
--- a/Build/source/texk/web2c/pdftexdir/ChangeLog
+++ b/Build/source/texk/web2c/pdftexdir/ChangeLog
@@ -1,3 +1,13 @@
+2012-05-20  Thanh Han The <thanh@river-valley.org>
+
+	* pdftex.defines (get/setimagegroupref): these replace imagegroupref.
+	* ptexlib.h: likewise.
+	* writeimg.c: define them, and check for page group
+	without object number.
+	* pdftex.web: change calls.
+	* pdftoepdf.cc: more page-group changes.
+	This is all related to http://bugs.debian.org/672951.
+
 2012-05-11  Peter Breitenlohner  <peb@mppmu.mpg.de>
 
 	* pdftex.web: Adapted to e-TeX Version 2.4.
diff --git a/Build/source/texk/web2c/pdftexdir/pdftex.defines b/Build/source/texk/web2c/pdftexdir/pdftex.defines
index d21075556fe..620bbea80a5 100644
--- a/Build/source/texk/web2c/pdftexdir/pdftex.defines
+++ b/Build/source/texk/web2c/pdftexdir/pdftex.defines
@@ -111,7 +111,8 @@ with this program.  If not, see <http://www.gnu.org/licenses/>.
 @define function imagerotate();
 @define function imagepages();
 @define function imagecolordepth();
-@define function imagegroupref();
+@define function getimagegroupref();
+@define procedure setimagegroupref();
 @define function imagewidth();
 @define function imagexres();
 @define function imageyres();
diff --git a/Build/source/texk/web2c/pdftexdir/pdftex.web b/Build/source/texk/web2c/pdftexdir/pdftex.web
index 956514c239f..4c20f370c13 100644
--- a/Build/source/texk/web2c/pdftexdir/pdftex.web
+++ b/Build/source/texk/web2c/pdftexdir/pdftex.web
@@ -36064,7 +36064,7 @@ begin
         pdf_append_list(pdf_ximage_objnum(p))(pdf_ximage_list);
     if not is_pdf_image(image) then begin
         if is_png_image(image) then begin
-            groupref := image_group_ref(image);
+            groupref := get_image_group_ref(image);
             if (groupref > 0) and (pdf_page_group_val = 0) then 
                 pdf_page_group_val := groupref;
         end;
@@ -36079,9 +36079,14 @@ begin
     end
     else begin
         {for pdf images we generate the page group object number here}
-        groupref := image_group_ref(image); {this is only a flag whether page group is present}
-        if (groupref > 0) and (pdf_page_group_val = 0) then begin
-            pdf_page_group_val := pdf_new_objnum;
+        groupref := get_image_group_ref(image); {0: no group, -1: to be generated; >0: already written}
+        if (groupref <> 0) and (pdf_page_group_val = 0) then begin
+            if groupref = -1 then begin
+                pdf_page_group_val := pdf_new_objnum;
+                set_image_group_ref(image, pdf_page_group_val);
+            end
+            else { groupref > 0 }
+                pdf_page_group_val := groupref;
         end;
         pdf_print_real(ext_xn_over_d(pdf_width(p),
                        ten_pow[6], img_w), 6);
diff --git a/Build/source/texk/web2c/pdftexdir/pdftoepdf.cc b/Build/source/texk/web2c/pdftexdir/pdftoepdf.cc
index d1edb9dcee2..358b726f045 100644
--- a/Build/source/texk/web2c/pdftexdir/pdftoepdf.cc
+++ b/Build/source/texk/web2c/pdftexdir/pdftoepdf.cc
@@ -811,6 +811,8 @@ read_pdf_info(char *image_name, char *page_name, int page_num,
         epdf_has_page_group = 1;    // only flag that page group is present;
                                     // the actual object number will be
                                     // generated in pdftex.web
+    else
+        epdf_has_page_group = 0;    // no page group present
 
     pdf_doc->xref = pdf_doc->doc->getXRef();
     return page_num;
@@ -941,6 +943,8 @@ void write_epdf(void)
         if (pdfpagegroupval == 0) { 
             // another pdf with page group was included earlier on the same page;
             // copy the Group entry as is
+            pdftex_warn
+                ("PDF inclusion: multiple pdfs with page group included in a single page");
             pdf_newline();
             pdf_puts("/Group ");
             copyObject(&dictObj);
diff --git a/Build/source/texk/web2c/pdftexdir/ptexlib.h b/Build/source/texk/web2c/pdftexdir/ptexlib.h
index 96b766c0472..c0dd1bb3bda 100644
--- a/Build/source/texk/web2c/pdftexdir/ptexlib.h
+++ b/Build/source/texk/web2c/pdftexdir/ptexlib.h
@@ -294,7 +294,8 @@ extern integer imagewidth(integer);
 extern integer imagexres(integer);
 extern integer imageyres(integer);
 extern integer imagecolordepth(integer);
-extern integer imagegroupref(integer);
+extern integer getimagegroupref(integer);
+extern void setimagegroupref(integer,integer);
 extern integer readimage(strnumber, integer, strnumber, integer, integer,
                          integer, integer);
 extern void deleteimage(integer);
diff --git a/Build/source/texk/web2c/pdftexdir/writeimg.c b/Build/source/texk/web2c/pdftexdir/writeimg.c
index d11559f88f9..846d4727875 100644
--- a/Build/source/texk/web2c/pdftexdir/writeimg.c
+++ b/Build/source/texk/web2c/pdftexdir/writeimg.c
@@ -150,11 +150,16 @@ integer imagecolordepth(integer img)
     }
 }
 
-integer imagegroupref(integer img)
+integer getimagegroupref(integer img)
 {
     return img_group_ref(img);
 }
 
+void setimagegroupref(integer img, integer value)
+{
+    img_group_ref(img) = value;
+}
+
 /*
   Patch ImageTypeDetection 2003/02/08 by Heiko Oberdiek.
 
@@ -322,7 +327,11 @@ integer readimage(strnumber s, integer page_num, strnumber page_name,
         pdf_ptr(img)->orig_y = bp2int(epdf_orig_y);
         pdf_ptr(img)->selected_page = page_num;
         pdf_ptr(img)->doc = epdf_doc;
-        img_group_ref(img) = epdf_has_page_group;
+        if (epdf_has_page_group == 1)
+            img_group_ref(img) = -1;    // page group present, but new object
+                                        // number not set yet
+        else
+            img_group_ref(img) = 0;     // no page group present
         break;
     case IMAGE_TYPE_PNG:
         img_pages(img) = 1;