Revert "Update libpng from 1.6.22 -> 1.6.34"chromium/3543

This reverts commit 6b2e2f0ec7c5f629c5270d14c2339197af7392d8.

Reason for revert: Broke Chromium integration.

Original change's description:
> Update libpng from 1.6.22 -> 1.6.34
> 
> Updates third_party/libpng16 to Chromium's third_party/libpng @
> e87a02987101e2dbe319a4aba6b52470f7624b4a and applies PDFium specific
> patches.
> 
> BUG=chromium:880322
> 
> Change-Id: I6724f55099c70a79da6d6e4863b9c6c9157ec571
> Reviewed-on: https://pdfium-review.googlesource.com/41910
> Reviewed-by: Lei Zhang <thestig@chromium.org>
> Commit-Queue: Ryan Harrison <rharrison@chromium.org>

TBR=thestig@chromium.org,rharrison@chromium.org

Change-Id: I2fd1f78e5d07ca983b2430bf078544185292ee1d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:880322
Reviewed-on: https://pdfium-review.googlesource.com/41970
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>

1 files changed, 96 insertions, 117 deletions

diff --git a/third_party/libpng16/png.h b/third_party/libpng16/png.h
index 4c873f5c22..08c039df0b 100644
--- a/third_party/libpng16/png.h
+++ b/third_party/libpng16/png.h
@@ -1,9 +1,9 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.6.34, September 29, 2017
+ * libpng version 1.6.22, May 26, 2016
  *
- * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
@@ -12,7 +12,7 @@
  * Authors and maintainers:
  *   libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
  *   libpng versions 0.89, June 1996, through 0.96, May 1997: Andreas Dilger
- *   libpng versions 0.97, January 1998, through 1.6.34, September 29, 2017:
+ *   libpng versions 0.97, January 1998, through 1.6.22, May 26, 2016:
  *     Glenn Randers-Pehrson.
  *   See also "Contributing Authors", below.
  */
@@ -25,8 +25,12 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.0.7, July 1, 2000 through 1.6.34, September 29, 2017 are
- * Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
+ * Some files in the "contrib" directory and some configure-generated
+ * files that are distributed with libpng have other copyright owners and
+ * are released under other open source licenses.
+ *
+ * libpng versions 1.0.7, July 1, 2000 through 1.6.22, May 26, 2016 are
+ * Copyright (c) 2000-2002, 2004, 2006-2016 Glenn Randers-Pehrson, are
  * derived from libpng-1.0.6, and are distributed according to the same
  * disclaimer and license as libpng-1.0.6 with the following individuals
  * added to the list of Contributing Authors:
@@ -37,9 +41,6 @@
  *    Cosmin Truta
  *    Gilles Vollant
  *    James Yu
- *    Mandar Sahastrabuddhe
- *    Google Inc.
- *    Vadim Barkov
  *
  * and with the following additions to the disclaimer:
  *
@@ -50,10 +51,10 @@
  *    risk of satisfactory quality, performance, accuracy, and effort is with
  *    the user.
  *
- * Some files in the "contrib" directory and some configure-generated
- * files that are distributed with libpng have other copyright owners and
+ * Some files in the "contrib" directory have other copyright owners and
  * are released under other open source licenses.
  *
+ *
  * libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
  * Copyright (c) 1998-2000 Glenn Randers-Pehrson, are derived from
  * libpng-0.96, and are distributed according to the same disclaimer and
@@ -64,6 +65,9 @@
  *    Glenn Randers-Pehrson
  *    Willem van Schaik
  *
+ * Some files in the "scripts" directory have different copyright owners
+ * but are also released under this license.
+ *
  * libpng versions 0.89, June 1996, through 0.96, May 1997, are
  * Copyright (c) 1996-1997 Andreas Dilger, are derived from libpng-0.88,
  * and are distributed according to the same disclaimer and license as
@@ -209,11 +213,11 @@
  *    ...
  *    1.0.19                  10    10019  10.so.0.19[.0]
  *    ...
- *    1.2.59                  13    10257  12.so.0.59[.0]
+ *    1.2.56                  13    10256  12.so.0.56[.0]
  *    ...
- *    1.5.30                  15    10527  15.so.15.30[.0]
+ *    1.5.27                  15    10527  15.so.15.27[.0]
  *    ...
- *    1.6.34                  16    10633  16.so.16.34[.0]
+ *    1.6.22                  16    10622  16.so.16.22[.0]
  *
  *    Henceforth the source version will match the shared-library major
  *    and minor numbers; the shared-library major version number will be
@@ -234,20 +238,20 @@
  *
  * See libpng.txt or libpng.3 for more information.  The PNG specification
  * is available as a W3C Recommendation and as an ISO Specification,
- * <https://www.w3.org/TR/2003/REC-PNG-20031110/
+ * <http://www.w3.org/TR/2003/REC-PNG-20031110/
  */
 
 /*
  * Y2K compliance in libpng:
  * =========================
  *
- *    September 29, 2017
+ *    May 26, 2016
  *
  *    Since the PNG Development group is an ad-hoc body, we can't make
  *    an official declaration.
  *
  *    This is your unofficial assurance that libpng from version 0.71 and
- *    upward through 1.6.34 are Y2K compliant.  It is my belief that
+ *    upward through 1.6.22 are Y2K compliant.  It is my belief that
  *    earlier versions were also Y2K compliant.
  *
  *    Libpng only has two year fields.  One is a 2-byte unsigned integer
@@ -309,8 +313,9 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.6.34"
-#define PNG_HEADER_VERSION_STRING " libpng version 1.6.34 - September 29, 2017\n"
+#define PNG_LIBPNG_VER_STRING "1.6.22"
+#define PNG_HEADER_VERSION_STRING \
+     " libpng version 1.6.22 - May 26, 2016\n"
 
 #define PNG_LIBPNG_VER_SONUM   16
 #define PNG_LIBPNG_VER_DLLNUM  16
@@ -318,7 +323,7 @@
 /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
 #define PNG_LIBPNG_VER_MAJOR   1
 #define PNG_LIBPNG_VER_MINOR   6
-#define PNG_LIBPNG_VER_RELEASE 34
+#define PNG_LIBPNG_VER_RELEASE 22
 
 /* This should match the numeric part of the final component of
  * PNG_LIBPNG_VER_STRING, omitting any leading zero:
@@ -349,20 +354,20 @@
  * version 1.0.0 was mis-numbered 100 instead of 10000).  From
  * version 1.0.1 it's    xxyyzz, where x=major, y=minor, z=release
  */
-#define PNG_LIBPNG_VER 10634 /* 1.6.34 */
+#define PNG_LIBPNG_VER 10622 /* 1.6.22 */
 
 /* Library configuration: these options cannot be changed after
  * the library has been built.
  */
 #ifndef PNGLCONF_H
-/* If pnglibconf.h is missing, you can
- * copy scripts/pnglibconf.h.prebuilt to pnglibconf.h
- */
+    /* If pnglibconf.h is missing, you can
+     * copy scripts/pnglibconf.h.prebuilt to pnglibconf.h
+     */
 #   include "pnglibconf.h"
 #endif
 
 #ifndef PNG_VERSION_INFO_ONLY
-/* Machine specific configuration. */
+   /* Machine specific configuration. */
 #  include "pngconf.h"
 #endif
 
@@ -459,7 +464,7 @@ extern "C" {
 /* This triggers a compiler error in png.c, if png.c and png.h
  * do not agree upon the version number.
  */
-typedef char* png_libpng_version_1_6_34;
+typedef char* png_libpng_version_1_6_22;
 
 /* Basic control structions.  Read libpng-manual.txt or libpng.3 for more info.
  *
@@ -652,17 +657,17 @@ typedef png_time * * png_timepp;
  */
 typedef struct png_unknown_chunk_t
 {
-   png_byte name[5]; /* Textual chunk name with '\0' terminator */
-   png_byte *data;   /* Data, should not be modified on read! */
-   png_size_t size;
-
-   /* On write 'location' must be set using the flag values listed below.
-    * Notice that on read it is set by libpng however the values stored have
-    * more bits set than are listed below.  Always treat the value as a
-    * bitmask.  On write set only one bit - setting multiple bits may cause the
-    * chunk to be written in multiple places.
-    */
-   png_byte location; /* mode of operation at read time */
+    png_byte name[5]; /* Textual chunk name with '\0' terminator */
+    png_byte *data;   /* Data, should not be modified on read! */
+    png_size_t size;
+
+    /* On write 'location' must be set using the flag values listed below.
+     * Notice that on read it is set by libpng however the values stored have
+     * more bits set than are listed below.  Always treat the value as a
+     * bitmask.  On write set only one bit - setting multiple bits may cause the
+     * chunk to be written in multiple places.
+     */
+    png_byte location; /* mode of operation at read time */
 }
 png_unknown_chunk;
 
@@ -776,7 +781,6 @@ typedef png_unknown_chunk * * png_unknown_chunkpp;
 #define PNG_INFO_sPLT 0x2000U  /* ESR, 1.0.6 */
 #define PNG_INFO_sCAL 0x4000U  /* ESR, 1.0.6 */
 #define PNG_INFO_IDAT 0x8000U  /* ESR, 1.0.6 */
-#define PNG_INFO_eXIf 0x10000U /* GR-P, 1.6.31 */
 
 /* This is used for the transformation routines, as some of them
  * change these values for the row.  It also should enable using
@@ -1789,8 +1793,7 @@ PNG_EXPORT(99, void, png_data_freer, (png_const_structrp png_ptr,
 #define PNG_FREE_PLTE 0x1000U
 #define PNG_FREE_TRNS 0x2000U
 #define PNG_FREE_TEXT 0x4000U
-#define PNG_FREE_EXIF 0x8000U /* Added at libpng-1.6.31 */
-#define PNG_FREE_ALL  0xffffU
+#define PNG_FREE_ALL  0x7fffU
 #define PNG_FREE_MUL  0x4220U /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */
 
 #ifdef PNG_USER_MEM_SUPPORTED
@@ -2009,18 +2012,6 @@ PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_const_structrp png_ptr,
     png_fixed_point int_blue_Z))
 #endif
 
-#ifdef PNG_eXIf_SUPPORTED
-PNG_EXPORT(246, png_uint_32, png_get_eXIf, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_bytep *exif));
-PNG_EXPORT(247, void, png_set_eXIf, (png_const_structrp png_ptr,
-    png_inforp info_ptr, const png_bytep exif));
-
-PNG_EXPORT(248, png_uint_32, png_get_eXIf_1, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr, png_uint_32 *num_exif, png_bytep *exif));
-PNG_EXPORT(249, void, png_set_eXIf_1, (png_const_structrp png_ptr,
-    png_inforp info_ptr, const png_uint_32 num_exif, const png_bytep exif));
-#endif
-
 #ifdef PNG_gAMA_SUPPORTED
 PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA, (png_const_structrp png_ptr,
     png_const_inforp info_ptr, double *file_gamma))
@@ -2039,6 +2030,9 @@ PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_const_structrp png_ptr,
 #ifdef PNG_hIST_SUPPORTED
 PNG_EXPORT(141, png_uint_32, png_get_hIST, (png_const_structrp png_ptr,
     png_inforp info_ptr, png_uint_16p *hist));
+#endif
+
+#ifdef PNG_hIST_SUPPORTED
 PNG_EXPORT(142, void, png_set_hIST, (png_const_structrp png_ptr,
     png_inforp info_ptr, png_const_uint_16p hist));
 #endif
@@ -2306,10 +2300,8 @@ PNG_EXPORT(171, void, png_set_sCAL_s, (png_const_structrp png_ptr,
  *    except for the IHDR, PLTE, tRNS, IDAT, and IEND chunks (which continue to
  *    be processed by libpng.
  */
-#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
 PNG_EXPORT(172, void, png_set_keep_unknown_chunks, (png_structrp png_ptr,
     int keep, png_const_bytep chunk_list, int num_chunks));
-#endif /* HANDLE_AS_UNKNOWN */
 
 /* The "keep" PNG_HANDLE_CHUNK_ parameter for the specified chunk is returned;
  * the result is therefore true (non-zero) if special handling is required,
@@ -2317,7 +2309,7 @@ PNG_EXPORT(172, void, png_set_keep_unknown_chunks, (png_structrp png_ptr,
  */
 PNG_EXPORT(173, int, png_handle_as_unknown, (png_const_structrp png_ptr,
     png_const_bytep chunk_name));
-#endif /* SET_UNKNOWN_CHUNKS */
+#endif
 
 #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
 PNG_EXPORT(174, void, png_set_unknown_chunks, (png_const_structrp png_ptr,
@@ -2538,37 +2530,33 @@ PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type,
 
  /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */
 
-#  define png_composite(composite, fg, alpha, bg)        \
-   {                                                     \
-      png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) \
-          * (png_uint_16)(alpha)                         \
-          + (png_uint_16)(bg)*(png_uint_16)(255          \
-          - (png_uint_16)(alpha)) + 128);                \
-      (composite) = (png_byte)(((temp + (temp >> 8)) >> 8) & 0xff); \
-   }
-
-#  define png_composite_16(composite, fg, alpha, bg)     \
-   {                                                     \
-      png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) \
-          * (png_uint_32)(alpha)                         \
-          + (png_uint_32)(bg)*(65535                     \
-          - (png_uint_32)(alpha)) + 32768);              \
-      (composite) = (png_uint_16)(0xffff & ((temp + (temp >> 16)) >> 16)); \
-   }
+#  define png_composite(composite, fg, alpha, bg)         \
+     { png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) \
+           * (png_uint_16)(alpha)                         \
+           + (png_uint_16)(bg)*(png_uint_16)(255          \
+           - (png_uint_16)(alpha)) + 128);                \
+       (composite) = (png_byte)(((temp + (temp >> 8)) >> 8) & 0xff); }
+
+#  define png_composite_16(composite, fg, alpha, bg)       \
+     { png_uint_32 temp = (png_uint_32)((png_uint_32)(fg)  \
+           * (png_uint_32)(alpha)                          \
+           + (png_uint_32)(bg)*(65535                      \
+           - (png_uint_32)(alpha)) + 32768);               \
+       (composite) = (png_uint_16)(0xffff & ((temp + (temp >> 16)) >> 16)); }
 
 #else  /* Standard method using integer division */
 
-#  define png_composite(composite, fg, alpha, bg)                      \
-   (composite) =                                                       \
-       (png_byte)(0xff & (((png_uint_16)(fg) * (png_uint_16)(alpha) +  \
-       (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \
-       127) / 255))
-
-#  define png_composite_16(composite, fg, alpha, bg)                       \
-   (composite) =                                                           \
-       (png_uint_16)(0xffff & (((png_uint_32)(fg) * (png_uint_32)(alpha) + \
-       (png_uint_32)(bg)*(png_uint_32)(65535 - (png_uint_32)(alpha)) +     \
-       32767) / 65535))
+#  define png_composite(composite, fg, alpha, bg)                        \
+     (composite) =                                                       \
+         (png_byte)(0xff & (((png_uint_16)(fg) * (png_uint_16)(alpha) +  \
+         (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \
+         127) / 255))
+
+#  define png_composite_16(composite, fg, alpha, bg)                         \
+     (composite) =                                                           \
+         (png_uint_16)(0xffff & (((png_uint_32)(fg) * (png_uint_32)(alpha) + \
+         (png_uint_32)(bg)*(png_uint_32)(65535 - (png_uint_32)(alpha)) +     \
+         32767) / 65535))
 #endif /* READ_COMPOSITE_NODIV */
 
 #ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED
@@ -2604,38 +2592,38 @@ PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i));
  * format for negative values, which is almost certainly true.
  */
 #  define PNG_get_uint_32(buf) \
-   (((png_uint_32)(*(buf)) << 24) + \
-    ((png_uint_32)(*((buf) + 1)) << 16) + \
-    ((png_uint_32)(*((buf) + 2)) << 8) + \
-    ((png_uint_32)(*((buf) + 3))))
+     (((png_uint_32)(*(buf)) << 24) + \
+      ((png_uint_32)(*((buf) + 1)) << 16) + \
+      ((png_uint_32)(*((buf) + 2)) << 8) + \
+      ((png_uint_32)(*((buf) + 3))))
 
    /* From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the
     * function) incorrectly returned a value of type png_uint_32.
     */
 #  define PNG_get_uint_16(buf) \
-   ((png_uint_16) \
-    (((unsigned int)(*(buf)) << 8) + \
-    ((unsigned int)(*((buf) + 1)))))
+     ((png_uint_16) \
+      (((unsigned int)(*(buf)) << 8) + \
+       ((unsigned int)(*((buf) + 1)))))
 
 #  define PNG_get_int_32(buf) \
-   ((png_int_32)((*(buf) & 0x80) \
-    ? -((png_int_32)(((png_get_uint_32(buf)^0xffffffffU)+1U)&0x7fffffffU)) \
-    : (png_int_32)png_get_uint_32(buf)))
+     ((png_int_32)((*(buf) & 0x80) \
+      ? -((png_int_32)(((png_get_uint_32(buf)^0xffffffffU)+1U)&0x7fffffffU)) \
+      : (png_int_32)png_get_uint_32(buf)))
 
-/* If PNG_PREFIX is defined the same thing as below happens in pnglibconf.h,
- * but defining a macro name prefixed with PNG_PREFIX.
- */
+   /* If PNG_PREFIX is defined the same thing as below happens in pnglibconf.h,
+    * but defining a macro name prefixed with PNG_PREFIX.
+    */
 #  ifndef PNG_PREFIX
-#    define png_get_uint_32(buf) PNG_get_uint_32(buf)
-#    define png_get_uint_16(buf) PNG_get_uint_16(buf)
-#    define png_get_int_32(buf)  PNG_get_int_32(buf)
+#     define png_get_uint_32(buf) PNG_get_uint_32(buf)
+#     define png_get_uint_16(buf) PNG_get_uint_16(buf)
+#     define png_get_int_32(buf)  PNG_get_int_32(buf)
 #  endif
 #else
 #  ifdef PNG_PREFIX
-   /* No macros; revert to the (redefined) function */
-#    define PNG_get_uint_32 (png_get_uint_32)
-#    define PNG_get_uint_16 (png_get_uint_16)
-#    define PNG_get_int_32  (png_get_int_32)
+      /* No macros; revert to the (redefined) function */
+#     define PNG_get_uint_32 (png_get_uint_32)
+#     define PNG_get_uint_16 (png_get_uint_16)
+#     define PNG_get_int_32  (png_get_int_32)
 #  endif
 #endif
 
@@ -2764,7 +2752,7 @@ typedef struct
  *
  * When the simplified API needs to convert between sRGB and linear colorspaces,
  * the actual sRGB transfer curve defined in the sRGB specification (see the
- * article at https://en.wikipedia.org/wiki/SRGB) is used, not the gamma=1/2.2
+ * article at http://en.wikipedia.org/wiki/SRGB) is used, not the gamma=1/2.2
  * approximation used elsewhere in libpng.
  *
  * When an alpha channel is present it is expected to denote pixel coverage
@@ -2819,8 +2807,6 @@ typedef struct
 #  define PNG_FORMAT_FLAG_AFIRST 0x20U /* alpha channel comes first */
 #endif
 
-#define PNG_FORMAT_FLAG_ASSOCIATED_ALPHA 0x40U /* alpha channel is associated */
-
 /* Commonly used formats have predefined macros.
  *
  * First the single byte (sRGB) formats:
@@ -3185,9 +3171,9 @@ PNG_EXPORT(245, int, png_image_write_to_memory, (png_imagep image, void *memory,
 #define PNG_IMAGE_PNG_SIZE_MAX_(image, image_size)\
    ((8U/*sig*/+25U/*IHDR*/+16U/*gAMA*/+44U/*cHRM*/+12U/*IEND*/+\
     (((image).format&PNG_FORMAT_FLAG_COLORMAP)?/*colormap: PLTE, tRNS*/\
-    12U+3U*(image).colormap_entries/*PLTE data*/+\
-    (((image).format&PNG_FORMAT_FLAG_ALPHA)?\
-    12U/*tRNS*/+(image).colormap_entries:0U):0U)+\
+     12U+3U*(image).colormap_entries/*PLTE data*/+\
+     (((image).format&PNG_FORMAT_FLAG_ALPHA)?\
+      12U/*tRNS*/+(image).colormap_entries:0U):0U)+\
     12U)+(12U*((image_size)/PNG_ZBUF_SIZE))/*IDAT*/+(image_size))
    /* A helper for the following macro; if your compiler cannot handle the
     * following macro use this one with the result of
@@ -3235,14 +3221,7 @@ PNG_EXPORT(245, int, png_image_write_to_memory, (png_imagep image, void *memory,
 #endif
 #define PNG_MAXIMUM_INFLATE_WINDOW 2 /* SOFTWARE: force maximum window */
 #define PNG_SKIP_sRGB_CHECK_PROFILE 4 /* SOFTWARE: Check ICC profile for sRGB */
-#ifdef PNG_MIPS_MSA_API_SUPPORTED
-#  define PNG_MIPS_MSA   6 /* HARDWARE: MIPS Msa SIMD instructions supported */
-#endif
-#define PNG_IGNORE_ADLER32 8
-#ifdef PNG_POWERPC_VSX_API_SUPPORTED
-#  define PNG_POWERPC_VSX   10 /* HARDWARE: PowerPC VSX SIMD instructions supported */
-#endif
-#define PNG_OPTION_NEXT  12 /* Next option - numbers must be even */
+#define PNG_OPTION_NEXT  6 /* Next option - numbers must be even */
 
 /* Return values: NOTE: there are four values and 'off' is *not* zero */
 #define PNG_OPTION_UNSET   0 /* Unset - defaults to off */
@@ -3266,7 +3245,7 @@ PNG_EXPORT(244, int, png_set_option, (png_structrp png_ptr, int option,
  * one to use is one more than this.)
  */
 #ifdef PNG_EXPORT_LAST_ORDINAL
-  PNG_EXPORT_LAST_ORDINAL(249);
+  PNG_EXPORT_LAST_ORDINAL(245);
 #endif
 
 #ifdef __cplusplus