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add -near_lossless [0..100] experimental option

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This compresses the uimage using lossless compression and controlable
decimating pre-process.
Code is under WEBP_EXPERIMENTAL_FEATURE while it's being experimented with.

Change-Id: I8b7f4cfcc3c6afc52a556102842bdbb045ed5ee8
This commit is contained in:
skal
2014-08-05 19:14:57 +02:00
parent 0524d9e5e8
commit b5a36cc9ad
11 changed files with 171 additions and 1 deletions
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5
src/enc/webpenc.c
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@ -362,6 +362,11 @@ int WebPEncode(const WebPConfig* config, WebPPicture* pic) {
}
ok &= DeleteVP8Encoder(enc); // must always be called, even if !ok
} else {
if (config->near_lossless > 0 &&
!VP8ApplyNearLossless(pic->width, pic->height,
pic->argb, config->near_lossless)) {
return 0;
}
// Make sure we have ARGB samples.
if (pic->argb == NULL && !WebPPictureYUVAToARGB(pic)) {
return 0;