[libpng15] Imported from libpng-1.5.23beta02.tarv1.5.23beta02

18 files changed, 103 insertions, 102 deletions

diff --git a/ANNOUNCE b/ANNOUNCE
index db0bbaaa4..adc6b3e73 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.5.23beta02 - June 3, 2015
+Libpng 1.5.23beta02 - June 30, 2015
 
 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.
@@ -38,7 +38,7 @@ Version 1.5.23beta01 [May 21, 2015]
   Avoid a harmless potential integer overflow in png_XYZ_from_xy() (Bug
     report from Christopher Ferris).
 
-Version 1.5.23beta02 [June 3, 2015]
+Version 1.5.23beta02 [June 30, 2015]
   Removed WRITE_WEIGHTED_FILTERED code, to save a few kbytes of the
     compiled library size. It never worked properly and as far as we can
     tell, no one uses it. The png_set_filter_heuristics() and
diff --git a/CHANGES b/CHANGES
index d2520f25e..a3e4ab8b4 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4350,7 +4350,7 @@ Version 1.5.23beta01 [May 21, 2015]
   Avoid a harmless potential integer overflow in png_XYZ_from_xy() (Bug
     report from Christopher Ferris).
 
-Version 1.5.23beta02 [June 3, 2015]
+Version 1.5.23beta02 [June 30, 2015]
   Removed WRITE_WEIGHTED_FILTERED code, to save a few kbytes of the
     compiled library size. It never worked properly and as far as we can
     tell, no one uses it. The png_set_filter_heuristics() and
diff --git a/LICENSE b/LICENSE
index 17f71c7dd..95dd243da 100644
--- a/LICENSE
+++ b/LICENSE
@@ -10,7 +10,7 @@ this sentence.
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.5.23beta02, June 1, 2015, are
+libpng versions 1.2.6, August 15, 2004, through 1.5.23beta02, June 30, 2015, are
 Copyright (c) 2004, 2006-2015 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors
@@ -108,4 +108,4 @@ certification mark of the Open Source Initiative.
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-June 1, 2015
+June 30, 2015
diff --git a/README b/README
index e88957347..07eb8c94b 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.5.23beta02 - June 1, 2015 (shared library 15.0)
+README for libpng version 1.5.23beta02 - June 30, 2015 (shared library 15.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
diff --git a/libpng-manual.txt b/libpng-manual.txt
index 21c6d6dab..8707599c9 100644
--- a/libpng-manual.txt
+++ b/libpng-manual.txt
@@ -1,6 +1,6 @@
 Libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.5.23beta02 - June 1, 2015
+ libpng version 1.5.23beta02 - June 30, 2015
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2014 Glenn Randers-Pehrson
@@ -11,7 +11,7 @@ Libpng-manual.txt - A description on how to use and modify libpng
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.5.23beta02 - June 1, 2015
+ libpng versions 0.97, January 1998, through 1.5.23beta02 - June 30, 2015
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2014 Glenn Randers-Pehrson
 
@@ -4535,7 +4535,7 @@ Other rules can be inferred by inspecting the libpng source.
 
 XIV. Y2K Compliance in libpng
 
-June 1, 2015
+June 30, 2015
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
diff --git a/libpng.3 b/libpng.3
index a9f805f63..6634e6233 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,4 +1,4 @@
-.TH LIBPNG 3 "June 1, 2015"
+.TH LIBPNG 3 "June 30, 2015"
 .SH NAME
 libpng \- Portable Network Graphics (PNG) Reference Library 1.5.23beta02
 .SH SYNOPSIS
@@ -492,7 +492,7 @@ Following is a copy of the libpng-manual.txt file that accompanies libpng.
 .SH LIBPNG.TXT
 Libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.5.23beta02 - June 1, 2015
+ libpng version 1.5.23beta02 - June 30, 2015
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2014 Glenn Randers-Pehrson
@@ -503,7 +503,7 @@ Libpng-manual.txt - A description on how to use and modify libpng
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.5.23beta02 - June 1, 2015
+ libpng versions 0.97, January 1998, through 1.5.23beta02 - June 30, 2015
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2014 Glenn Randers-Pehrson
 
@@ -5027,7 +5027,7 @@ Other rules can be inferred by inspecting the libpng source.
 
 .SH XIV. Y2K Compliance in libpng
 
-June 1, 2015
+June 30, 2015
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
@@ -5337,7 +5337,7 @@ possible without all of you.
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.5.23beta02 - June 1, 2015:
+Libpng version 1.5.23beta02 - June 30, 2015:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -5360,7 +5360,7 @@ this sentence.
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.5.23beta02, June 1, 2015, are
+libpng versions 1.2.6, August 15, 2004, through 1.5.23beta02, June 30, 2015, are
 Copyright (c) 2004,2006-2015 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors
@@ -5459,7 +5459,7 @@ certification mark of the Open Source Initiative.
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-June 1, 2015
+June 30, 2015
 
 .\" end of man page
 
diff --git a/libpngpf.3 b/libpngpf.3
index 2e6ccdbf2..6580c9fe5 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,4 +1,4 @@
-.TH LIBPNGPF 3 "June 1, 2015"
+.TH LIBPNGPF 3 "June 30, 2015"
 .SH NAME
 libpng \- Portable Network Graphics (PNG) Reference Library 1.5.23beta02
 (private functions)
diff --git a/png.5 b/png.5
index 8ae0ca2a7..57bba1a39 100644
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "June 1, 2015"
+.TH PNG 5 "June 30, 2015"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
diff --git a/png.c b/png.c
index 34b9fab68..426c1e435 100644
--- a/png.c
+++ b/png.c
@@ -648,13 +648,13 @@ png_get_copyright(png_const_structp png_ptr)
 #else
 #  ifdef __STDC__
    return PNG_STRING_NEWLINE \
-     "libpng version 1.5.23beta02 - June 1, 2015" PNG_STRING_NEWLINE \
+     "libpng version 1.5.23beta02 - June 30, 2015" PNG_STRING_NEWLINE \
      "Copyright (c) 1998-2015 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 1.5.23beta02 - June 1, 2015\
+      return "libpng version 1.5.23beta02 - June 30, 2015\
       Copyright (c) 1998-2015 Glenn Randers-Pehrson\
       Copyright (c) 1996-1997 Andreas Dilger\
       Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
diff --git a/png.h b/png.h
index f42f13adb..f6525da51 100644
--- a/png.h
+++ b/png.h
@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.5.23beta02, June 10, 2015
+ * libpng version 1.5.23beta02, June 30, 2015
  *
  * Copyright (c) 1998-2015 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -12,7 +12,7 @@
  * Authors and maintainers:
  *   libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
  *   libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
- *   libpng versions 0.97, January 1998, through 1.5.23beta02, June 10, 2015: Glenn
+ *   libpng versions 0.97, January 1998, through 1.5.23beta02, June 30, 2015: Glenn
  *   See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -241,7 +241,7 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.5.23beta02, June 10, 2015, are
+ * libpng versions 1.2.6, August 15, 2004, through 1.5.23beta02, June 30, 2015, are
  * Copyright (c) 2004, 2006-2015 Glenn Randers-Pehrson, and are
  * distributed according to the same disclaimer and license as libpng-1.2.5
  * with the following individual added to the list of Contributing Authors:
@@ -353,7 +353,7 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    June 10, 2015
+ *    June 30, 2015
  *
  *    Since the PNG Development group is an ad-hoc body, we can't make
  *    an official declaration.
@@ -422,7 +422,7 @@
 /* Version information for png.h - this should match the version in png.c */
 #define PNG_LIBPNG_VER_STRING "1.5.23beta02"
 #define PNG_HEADER_VERSION_STRING \
-     " libpng version 1.5.23beta02 - June 10, 2015\n"
+     " libpng version 1.5.23beta02 - June 30, 2015\n"
 
 #define PNG_LIBPNG_VER_SONUM   15
 #define PNG_LIBPNG_VER_DLLNUM  15
diff --git a/pngconf.h b/pngconf.h
index 1451ae41f..e7752e684 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.5.23beta02, June 1, 2015
+ * libpng version 1.5.23beta02, June 30, 2015
  *
  * Copyright (c) 1998-2013 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngpread.c b/pngpread.c
index ac71460c2..14d455a71 100644
--- a/pngpread.c
+++ b/pngpread.c
@@ -70,10 +70,10 @@ png_process_data_pause(png_structp png_ptr, int save)
 png_uint_32 PNGAPI
 png_process_data_skip(png_structp png_ptr)
 {
-    /* TODO: somewhere the implementation of this seems to have been lost,
-     * or abandoned.  It was only to support some internal snooping done by
-     * Mozilla (i.e. back-door access to png_struct) in 1.4; apparently they
-     * must have stopped doing it.
+    /* TODO: Deprecate and remove this API.
+     * Somewhere the implementation of this seems to have been lost,
+     * or abandoned.  It was only to support some internal back-door access
+     * to png_struct) in libpng-1.4.x.
      */
    png_warning(png_ptr,
        "png_process_data_skip is not implemented in any current version"
diff --git a/pngread.c b/pngread.c
index c25e75c8c..ccb030a8e 100644
--- a/pngread.c
+++ b/pngread.c
@@ -559,7 +559,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
       if (ret == Z_STREAM_END)
       {
          if (png_ptr->zstream.avail_out || png_ptr->zstream.avail_in ||
-            png_ptr->idat_size)
+             png_ptr->idat_size)
             png_benign_error(png_ptr, "Extra compressed data");
          png_ptr->mode |= PNG_AFTER_IDAT;
          png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
@@ -617,7 +617,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
 #ifdef PNG_READ_INTERLACING_SUPPORTED
    /* Blow up interlaced rows to full size */
    if (png_ptr->interlaced &&
-      (png_ptr->transformations & PNG_INTERLACE))
+       (png_ptr->transformations & PNG_INTERLACE))
    {
       if (png_ptr->pass < 6)
          png_do_read_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass,
@@ -1119,9 +1119,8 @@ png_set_read_status_fn(png_structp png_ptr, png_read_status_ptr read_row_fn)
 #ifdef PNG_SEQUENTIAL_READ_SUPPORTED
 #ifdef PNG_INFO_IMAGE_SUPPORTED
 void PNGAPI
-png_read_png(png_structp png_ptr, png_infop info_ptr,
-                           int transforms,
-                           voidp params)
+png_read_png(png_structp png_ptr, png_infop info_ptr, int transforms,
+    voidp params)
 {
    int row;
 
@@ -1281,7 +1280,7 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
 
       for (row = 0; row < (int)info_ptr->height; row++)
          info_ptr->row_pointers[row] = (png_bytep)png_malloc(png_ptr,
-            png_get_rowbytes(png_ptr, info_ptr));
+             png_get_rowbytes(png_ptr, info_ptr));
    }
 
    png_read_image(png_ptr, info_ptr->row_pointers);
diff --git a/pngwrite.c b/pngwrite.c
index e32530b29..341234be6 100644
--- a/pngwrite.c
+++ b/pngwrite.c
@@ -34,85 +34,87 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
 
    if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE))
    {
-   /* Write PNG signature */
-   png_write_sig(png_ptr);
+      /* Write PNG signature */
+      png_write_sig(png_ptr);
 
 #ifdef PNG_MNG_FEATURES_SUPPORTED
-   if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) && \
-       (png_ptr->mng_features_permitted))
-   {
-      png_warning(png_ptr, "MNG features are not allowed in a PNG datastream");
-      png_ptr->mng_features_permitted = 0;
-   }
+      if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) && \
+          (png_ptr->mng_features_permitted))
+      {
+         png_warning(png_ptr,
+             "MNG features are not allowed in a PNG datastream");
+         png_ptr->mng_features_permitted = 0;
+      }
 #endif
 
-   /* Write IHDR information. */
-   png_write_IHDR(png_ptr, info_ptr->width, info_ptr->height,
-       info_ptr->bit_depth, info_ptr->color_type, info_ptr->compression_type,
-       info_ptr->filter_type,
+      /* Write IHDR information. */
+      png_write_IHDR(png_ptr, info_ptr->width, info_ptr->height,
+          info_ptr->bit_depth, info_ptr->color_type,
+          info_ptr->compression_type, info_ptr->filter_type,
 #ifdef PNG_WRITE_INTERLACING_SUPPORTED
-       info_ptr->interlace_type);
+          info_ptr->interlace_type
 #else
-       0);
+          0
 #endif
-   /* The rest of these check to see if the valid field has the appropriate
-    * flag set, and if it does, writes the chunk.
-    */
+          );
+      /* The rest of these check to see if the valid field has the appropriate
+       * flag set, and if it does, writes the chunk.
+       */
 #ifdef PNG_WRITE_gAMA_SUPPORTED
-   if (info_ptr->valid & PNG_INFO_gAMA)
-      png_write_gAMA_fixed(png_ptr, info_ptr->gamma);
+      if (info_ptr->valid & PNG_INFO_gAMA)
+         png_write_gAMA_fixed(png_ptr, info_ptr->gamma);
 #endif
 #ifdef PNG_WRITE_sRGB_SUPPORTED
-   if (info_ptr->valid & PNG_INFO_sRGB)
-      png_write_sRGB(png_ptr, (int)info_ptr->srgb_intent);
+      if (info_ptr->valid & PNG_INFO_sRGB)
+         png_write_sRGB(png_ptr, (int)info_ptr->srgb_intent);
 #endif
 
 #ifdef PNG_WRITE_iCCP_SUPPORTED
-   if (info_ptr->valid & PNG_INFO_iCCP)
-      png_write_iCCP(png_ptr, info_ptr->iccp_name, PNG_COMPRESSION_TYPE_BASE,
-          (png_charp)info_ptr->iccp_profile, (int)info_ptr->iccp_proflen);
+      if (info_ptr->valid & PNG_INFO_iCCP)
+         png_write_iCCP(png_ptr, info_ptr->iccp_name, PNG_COMPRESSION_TYPE_BASE,
+             (png_charp)info_ptr->iccp_profile, (int)info_ptr->iccp_proflen);
 #endif
 #ifdef PNG_WRITE_sBIT_SUPPORTED
-   if (info_ptr->valid & PNG_INFO_sBIT)
-      png_write_sBIT(png_ptr, &(info_ptr->sig_bit), info_ptr->color_type);
+      if (info_ptr->valid & PNG_INFO_sBIT)
+         png_write_sBIT(png_ptr, &(info_ptr->sig_bit), info_ptr->color_type);
 #endif
 #ifdef PNG_WRITE_cHRM_SUPPORTED
-   if (info_ptr->valid & PNG_INFO_cHRM)
-      png_write_cHRM_fixed(png_ptr,
-          info_ptr->x_white, info_ptr->y_white,
-          info_ptr->x_red, info_ptr->y_red,
-          info_ptr->x_green, info_ptr->y_green,
-          info_ptr->x_blue, info_ptr->y_blue);
+      if (info_ptr->valid & PNG_INFO_cHRM)
+         png_write_cHRM_fixed(png_ptr,
+             info_ptr->x_white, info_ptr->y_white,
+             info_ptr->x_red, info_ptr->y_red,
+             info_ptr->x_green, info_ptr->y_green,
+             info_ptr->x_blue, info_ptr->y_blue);
 #endif
 
 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
-   if (info_ptr->unknown_chunks_num)
-   {
-      png_unknown_chunk *up;
-
-      png_debug(5, "writing extra chunks");
-
-      for (up = info_ptr->unknown_chunks;
-           up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
-           up++)
+      if (info_ptr->unknown_chunks_num)
       {
-         int keep = png_handle_as_unknown(png_ptr, up->name);
+         png_unknown_chunk *up;
 
-         if (keep != PNG_HANDLE_CHUNK_NEVER &&
-             up->location &&
-             !(up->location & PNG_HAVE_PLTE) &&
-             !(up->location & PNG_HAVE_IDAT) &&
-             !(up->location & PNG_AFTER_IDAT) &&
-             ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
-             (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS)))
+         png_debug(5, "writing extra chunks");
+
+         for (up = info_ptr->unknown_chunks;
+              up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
+              up++)
          {
-            if (up->size == 0)
-               png_warning(png_ptr, "Writing zero-length unknown chunk");
+            int keep = png_handle_as_unknown(png_ptr, up->name);
+
+            if (keep != PNG_HANDLE_CHUNK_NEVER &&
+                up->location &&
+                !(up->location & PNG_HAVE_PLTE) &&
+                !(up->location & PNG_HAVE_IDAT) &&
+                !(up->location & PNG_AFTER_IDAT) &&
+                ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
+                (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS)))
+            {
+               if (up->size == 0)
+                  png_warning(png_ptr, "Writing zero-length unknown chunk");
 
-            png_write_chunk(png_ptr, up->name, up->data, up->size);
+               png_write_chunk(png_ptr, up->name, up->data, up->size);
+            }
          }
       }
-   }
 #endif
       png_ptr->mode |= PNG_WROTE_INFO_BEFORE_PLTE;
    }
@@ -498,14 +500,13 @@ png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
  */
 #ifdef USE_FAR_KEYWORD
    if (setjmp(tmp_jmpbuf))
+      png_memcpy(png_jmpbuf(png_ptr), tmp_jmpbuf, png_sizeof(jmp_buf));
+   PNG_ABORT();
 #else
    if (setjmp(png_jmpbuf(png_ptr))) /* sets longjmp to match setjmp */
-#endif
-#ifdef USE_FAR_KEYWORD
-   png_memcpy(png_jmpbuf(png_ptr), tmp_jmpbuf, png_sizeof(jmp_buf));
-#endif
       PNG_ABORT();
 #endif
+#endif
 
 #ifdef PNG_USER_MEM_SUPPORTED
    png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn);
@@ -1066,6 +1067,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
        */
       if (png_ptr->row_buf != NULL)
       {
+         png_ptr->do_filter = PNG_FILTER_NONE;
 #ifdef PNG_WRITE_FILTER_SUPPORTED
          if ((png_ptr->do_filter & PNG_FILTER_SUB) && png_ptr->sub_row == NULL)
          {
@@ -1126,8 +1128,8 @@ png_set_filter(png_structp png_ptr, int method, int filters)
          }
 
          if (png_ptr->do_filter == PNG_NO_FILTERS)
-#endif /* PNG_WRITE_FILTER_SUPPORTED */
             png_ptr->do_filter = PNG_FILTER_NONE;
+#endif /* PNG_WRITE_FILTER_SUPPORTED */
       }
    }
    else
@@ -1309,10 +1311,10 @@ png_set_text_compression_window_bits(png_structp png_ptr, int window_bits)
 #ifndef WBITS_8_OK
    /* Avoid libpng bug with 256-byte windows */
    if (window_bits == 8)
-      {
-        png_warning(png_ptr, "Text compression window is being reset to 512");
-        window_bits = 9;
-      }
+   {
+      png_warning(png_ptr, "Text compression window is being reset to 512");
+      window_bits = 9;
+   }
 
 #endif
    png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_WINDOW_BITS;
diff --git a/projects/vstudio/readme.txt b/projects/vstudio/readme.txt
index a8b44f93f..b7382c8d8 100644
--- a/projects/vstudio/readme.txt
+++ b/projects/vstudio/readme.txt
@@ -1,7 +1,7 @@
 
 VisualStudio instructions
 
-libpng version 1.5.23beta02 - June 1, 2015
+libpng version 1.5.23beta02 - June 30, 2015
 
 Copyright (c) 1998-2010 Glenn Randers-Pehrson
 
diff --git a/projects/vstudio/zlib.props b/projects/vstudio/zlib.props
index cc0267c76..1fc357062 100644
--- a/projects/vstudio/zlib.props
+++ b/projects/vstudio/zlib.props
@@ -2,7 +2,7 @@
 <!--
  * zlib.props - location of zlib source
  *
- * libpng version 1.5.23beta02 - June 1, 2015
+ * libpng version 1.5.23beta02 - June 30, 2015
  *
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  *
diff --git a/scripts/README.txt b/scripts/README.txt
index 3ed20e17a..5620ab612 100644
--- a/scripts/README.txt
+++ b/scripts/README.txt
@@ -1,5 +1,5 @@
 
-Makefiles for  libpng version 1.5.23beta02 - June 1, 2015
+Makefiles for  libpng version 1.5.23beta02 - June 30, 2015
 
 pnglibconf.h.prebuilt       =>  Stores configuration settings
  makefile.linux    =>  Linux/ELF makefile
diff --git a/scripts/pnglibconf.h.prebuilt b/scripts/pnglibconf.h.prebuilt
index 1cd62a5c2..4f37f1dee 100644
--- a/scripts/pnglibconf.h.prebuilt
+++ b/scripts/pnglibconf.h.prebuilt
@@ -1,7 +1,7 @@
 /* 1.5.23beta02 STANDARD API DEFINITION */
 /* pnglibconf.h - library build configuration */
 
-/* libpng version 1.5.23beta02 - June 1, 2015 */
+/* libpng version 1.5.23beta02 - June 30, 2015 */
 
 /* Copyright (c) 1998-2013 Glenn Randers-Pehrson */