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2 Commits

Author SHA1 Message Date
hui su
7d67a1646d Lossy encoding: smoothen transparent areas to improve compression 
If "exact" is false, we can modify the luma samples in fully transparent
areas to facilitate lossy compression. Experiments on some PNG images
show compression improvement of more than 20%.

Change-Id: I1a728cfa920a6652bc1f600d87c01f7f648c4942
 2017-07-05 10:03:01 -07:00
James Zern
668e1dd44f src/{dec,enc,utils}: give filenames a unique suffix 
this avoids duplicates between these trees and dsp/, e.g., enc/tree.c,
dec/tree.c, making pulling the whole library source tree into one target
possible

BUG=webp:279

Change-Id: I060a614833c7c24ddd37bf641702ae6a5eef1775
 2017-01-19 19:09:48 -08:00