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Revert "Re-enable encoding of alpha plane with color cache for next release."

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This avoids generating file that would trigger a decoding bug
found in 0.4.0 -> 0.4.3 libwebp versions.

This reverts commit 6ecd72f845.

Change-Id: I4667cc8f7b851ba44479e3fe2b9d844b2c56fcf4
This commit is contained in:
Pascal Massimino
2016-03-18 11:01:54 +01:00
parent e88c4ca013
commit 97934e2447
3 changed files with 14 additions and 8 deletions
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6
src/enc/alpha.c
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@ -79,7 +79,11 @@ static int EncodeLossless(const uint8_t* const data, int width, int height,
config.quality = 8.f * effort_level;
assert(config.quality >= 0 && config.quality <= 100.f);
ok = (VP8LEncodeStream(&config, &picture, bw) == VP8_ENC_OK);
// TODO(urvang): Temporary fix to avoid generating images that trigger
// a decoder bug related to alpha with color cache.
// See: https://code.google.com/p/webp/issues/detail?id=239
// Need to re-enable this later.
ok = (VP8LEncodeStream(&config, &picture, bw, 0 /*use_cache*/) == VP8_ENC_OK);
WebPPictureFree(&picture);
ok = ok && !bw->error_;
if (!ok) {