testing different versions

.travis.yml

@@ -6,7 +6,6 @@ before_install:
   - export LD_LIBRARY_PATH=/lib:/usr/lib:/usr/local/lib:$HOME/opt/lib
   - export CPATH=$CPATH:$HOME/opt/include
 
-
 rvm:
   - 2.0
   - 2.1
@@ -19,6 +18,9 @@ rvm:
   - rbx-19mode
   - ruby-head
   - jruby-head
+env:
+  - LIBWEBP_VERSION=0.4.0
+  - LIBWEBP_VERSION=1.0.2
 
 cache: bundler
 sudo: false

ext/webp_ffi/webp_ffi.c

@@ -64,7 +64,7 @@ int webp_encode(const char *in_file, const char *out_file, const FfiWebpEncodeCo
   if (encode_config->lossless == 0 || encode_config->lossless == 1){
     config.lossless = encode_config->lossless;
   }
-  if (encode_config->near_lossless >= 0 && encode_config->near_lossless <= 100){
+  if (WebPGetEncoderVersion() >= 0x010000 && encode_config->near_lossless >= 0 && encode_config->near_lossless <= 100){
     config.near_lossless = encode_config->near_lossless;
     config.lossless = 1;  // use near-lossless only with lossless
   }

spec/travis_build.sh

@@ -1,6 +1,6 @@
 #/usr/bin/env sh
-wget http://downloads.webmproject.org/releases/webp/libwebp-1.0.2.tar.gz
-tar xvzf libwebp-1.0.2.tar.gz
-cd libwebp-1.0.2
+wget http://downloads.webmproject.org/releases/webp/libwebp-$LIBWEBP_VERSION.tar.gz
+tar xvzf libwebp-$LIBWEBP_VERSION.tar.gz
+cd libwebp-$LIBWEBP_VERSION
 ./configure --prefix=$HOME/opt
 make && make install