[libpng17] Removed #ifdef PNG_16BIT_SUPPORTED/#endif around png_product2(); it is

needed by png_reciprocal2().
Added #ifdef PNG_16BIT_SUPPORTED/#endif around png_log16bit() and
    png_do_swap().

ANNOUNCE

@@ -1,5 +1,5 @@
 
-Libpng 1.7.0beta41 - November 6, 2014
+Libpng 1.7.0beta41 - November 7, 2014
 
 This is not intended to be a public release.  It will be replaced
 within a few weeks by a public version or by another test version.
@@ -643,7 +643,11 @@ Version 1.7.0beta40 [November 6, 2014]
     numeric constant.  This adds appropriate, safe, casts to make the
     warnings go away.
 
-Version 1.7.0beta41 [November 6, 2014]
+Version 1.7.0beta41 [November 7, 2014]
+  Removed #ifdef PNG_16BIT_SUPPORTED/#endif around png_product2(); it is
+    needed by png_reciprocal2().
+  Added #ifdef PNG_16BIT_SUPPORTED/#endif around png_log16bit() and
+    png_do_swap().
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit

CHANGES

@@ -4932,7 +4932,11 @@ Version 1.7.0beta40 [November 6, 2014]
     numeric constant.  This adds appropriate, safe, casts to make the
     warnings go away.
 
-Version 1.7.0beta41 [November 6, 2014]
+Version 1.7.0beta41 [November 7, 2014]
+  Removed #ifdef PNG_16BIT_SUPPORTED/#endif around png_product2(); it is
+    needed by png_reciprocal2().
+  Added #ifdef PNG_16BIT_SUPPORTED/#endif around png_log16bit() and
+    png_do_swap().
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit

png.c

@@ -691,13 +691,13 @@ png_get_copyright(png_const_structrp png_ptr)
 #else
 #  ifdef __STDC__
    return PNG_STRING_NEWLINE \
-     "libpng version 1.7.0beta41 - November 6, 2014" PNG_STRING_NEWLINE \
+     "libpng version 1.7.0beta41 - November 7, 2014" PNG_STRING_NEWLINE \
      "Copyright (c) 1998-2014 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
      "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
      "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
      PNG_STRING_NEWLINE;
 #  else
-      return "libpng version 1.7.0beta41 - November 6, 2014\
+      return "libpng version 1.7.0beta41 - November 7, 2014\
       Copyright (c) 1998-2014 Glenn Randers-Pehrson\
       Copyright (c) 1996-1997 Andreas Dilger\
       Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
@@ -3277,7 +3277,7 @@ png_gamma_significant(png_fixed_point gamma_val)
 
 #ifdef PNG_READ_GAMMA_SUPPORTED
 /* A local convenience routine. */
-#ifndef PNG_FLOATING_ARITHMETIC_SUPPORTED
+#if defined(PNG_16BIT_SUPPORTED) || !defined(PNG_FLOATING_ARITHMETIC_SUPPORTED)
 static png_fixed_point
 png_product2(png_fixed_point a, png_fixed_point b)
 {
@@ -3298,7 +3298,7 @@ png_product2(png_fixed_point a, png_fixed_point b)
 
    return 0; /* overflow */
 }
-#endif
+#endif /* PNG_16BIT_SUPPORTED || !PNG_FLOATING_ARITHMETIC_SUPPORTED */
 
 /* The inverse of the above. */
 png_fixed_point
@@ -3450,6 +3450,7 @@ png_log8bit(unsigned int x)
  * Zero  (257):      0
  * End   (258):  23499
  */
+#ifdef PNG_16BIT_SUPPORTED
 static png_int_32
 png_log16bit(png_uint_32 x)
 {
@@ -3500,6 +3501,7 @@ png_log16bit(png_uint_32 x)
    /* Safe, because the result can't have more than 20 bits: */
    return (png_int_32)((lg2 + 2048) >> 12);
 }
+#endif /* 16BIT */
 
 /* The 'exp()' case must invert the above, taking a 20-bit fixed point
  * logarithmic value and returning a 16 or 8-bit number as appropriate.  In

pngwtran.c

@@ -538,9 +538,11 @@ png_do_write_transformations(png_structrp png_ptr, png_row_infop row_info)
 #endif
 
 #ifdef PNG_WRITE_SWAP_SUPPORTED
+#  ifdef PNG_16BIT_SUPPORTED
    if ((png_ptr->transformations & PNG_SWAP_BYTES) != 0)
       png_do_swap(row_info, png_ptr->row_buf + 1);
 #  endif
+#endif
 
 #ifdef PNG_WRITE_SHIFT_SUPPORTED
    if ((png_ptr->transformations & PNG_SHIFT) != 0)