libwebp: update to 0.4.2-rc2

third_party/libwebp/enc/config.c

 // Copyright 2011 Google Inc. All Rights Reserved.
 //
 // Use of this source code is governed by a BSD-style license
 // that can be found in the COPYING file in the root of the source
 // tree. An additional intellectual property rights grant can be found
 // in the file PATENTS. All contributing project authors may
 // be found in the AUTHORS file in the root of the source tree.
 // -----------------------------------------------------------------------------
 //
 // Coding tools configuration
@@ skipping 93 matching lines @@
   if (config->filter_sharpness < 0 || config->filter_sharpness > 7)
     return 0;
   if (config->filter_type < 0 || config->filter_type > 1)
     return 0;
   if (config->autofilter < 0 || config->autofilter > 1)
     return 0;
   if (config->pass < 1 || config->pass > 10)
     return 0;
   if (config->show_compressed < 0 || config->show_compressed > 1)
     return 0;
+#if WEBP_ENCODER_ABI_VERSION > 0x0204
+  if (config->preprocessing < 0 || config->preprocessing > 7)
+#else
   if (config->preprocessing < 0 || config->preprocessing > 3)
+#endif
     return 0;
   if (config->partitions < 0 || config->partitions > 3)
     return 0;
   if (config->partition_limit < 0 || config->partition_limit > 100)
     return 0;
   if (config->alpha_compression < 0)
     return 0;
   if (config->alpha_filtering < 0)
     return 0;
   if (config->alpha_quality < 0 || config->alpha_quality > 100)
@@ skipping 28 matching lines @@
 int WebPConfigLosslessPreset(WebPConfig* config, int level) {
   if (config == NULL || level < 0 || level > MAX_LEVEL) return 0;
   config->lossless = 1;
   config->method = kLosslessPresets[level].method_;
   config->quality = kLosslessPresets[level].quality_;
   return 1;
 }
 #endif
 
 //------------------------------------------------------------------------------