lossy decoding: correct alpha-rescaling for YUVA format

The luminance needs to be pre- and post- multiplied by
the alpha value in case of rescaling, for proper averaging.

Also:
- removed util/alpha_processing and moved it to dsp/
- removed WebPInitPremultiply() which was mostly useless
and merged it with the new function WebPInitAlphaProcessing()

Change-Id: If089cefd4ec53f6880a791c476fb1c7f7c5a8e60
This commit is contained in:
skal
2014-05-26 18:05:03 +02:00
committed by Gerrit Code Review
parent 78c12ed8e6
commit 399b916d27
14 changed files with 193 additions and 227 deletions

View File

@ -9,6 +9,7 @@ common_HEADERS = ../webp/types.h
commondir = $(includedir)/webp
COMMON_SOURCES =
COMMON_SOURCES += alpha_processing.c
COMMON_SOURCES += cpu.c
COMMON_SOURCES += dec.c
COMMON_SOURCES += dec_clip_tables.c