libwebp: update to 0.5.0

third_party/libwebp/enc/config.c

Index: third_party/libwebp/enc/config.c
diff --git a/third_party/libwebp/enc/config.c b/third_party/libwebp/enc/config.c
index 53a3bb2e71219a865cd8896c377c9d99d101b3e8..f9f7961d58816cf996bd3dfef035d43cd8ac789e 100644
--- a/third_party/libwebp/enc/config.c
+++ b/third_party/libwebp/enc/config.c
@@ -43,10 +43,15 @@ int WebPConfigInitInternal(WebPConfig* config,
   config->alpha_filtering = 1;
   config->alpha_quality = 100;
   config->lossless = 0;
+  config->exact = 0;
   config->image_hint = WEBP_HINT_DEFAULT;
   config->emulate_jpeg_size = 0;
   config->thread_level = 0;
   config->low_memory = 0;
+  config->near_lossless = 100;
+#ifdef WEBP_EXPERIMENTAL_FEATURES
+  config->delta_palettization = 0;
+#endif // WEBP_EXPERIMENTAL_FEATURES
 
   // TODO(skal): tune.
   switch (preset) {
@@ -111,11 +116,7 @@ int WebPValidateConfig(const WebPConfig* config) {
     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;
@@ -129,6 +130,8 @@ int WebPValidateConfig(const WebPConfig* config) {
     return 0;
   if (config->lossless < 0 || config->lossless > 1)
     return 0;
+  if (config->near_lossless < 0 || config->near_lossless > 100)
+    return 0;
   if (config->image_hint >= WEBP_HINT_LAST)
     return 0;
   if (config->emulate_jpeg_size < 0 || config->emulate_jpeg_size > 1)
@@ -137,12 +140,17 @@ int WebPValidateConfig(const WebPConfig* config) {
     return 0;
   if (config->low_memory < 0 || config->low_memory > 1)
     return 0;
+  if (config->exact < 0 || config->exact > 1)
+    return 0;
+#ifdef WEBP_EXPERIMENTAL_FEATURES
+  if (config->delta_palettization < 0 || config->delta_palettization > 1)
+    return 0;
+#endif  // WEBP_EXPERIMENTAL_FEATURES
   return 1;
 }
 
 //------------------------------------------------------------------------------
 
-#if WEBP_ENCODER_ABI_VERSION > 0x0202
 #define MAX_LEVEL 9
 
 // Mapping between -z level and -m / -q parameter settings.
@@ -161,6 +169,5 @@ int WebPConfigLosslessPreset(WebPConfig* config, int level) {
   config->quality = kLosslessPresets[level].quality_;
   return 1;
 }
-#endif
 
 //------------------------------------------------------------------------------