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add support for ARGB -> YUVA conversion for lossless decoder

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This was returning an (hard-to-explain) error before.
(through WebPDecodeYUV() for instance).

+ rationalize the incremental API:
-> add WebPINewYUVA
-> deprecated WebPINewYUV
-> add WebPIDecGetYUVA
-> deprecated WebPIDecGetYUV

+ some NULL cosmetics

Change-Id: I39a6bd6018a34294d898b29f6c40e2cf76f1037e
This commit is contained in:
Pascal Massimino
2012-08-03 22:15:34 +00:00
committed by James Zern
parent 33705ca093
commit 43b0d6107a
5 changed files with 214 additions and 64 deletions
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4
README
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@ -405,12 +405,12 @@ The 'idec' object must always be released (even upon an error condition) by
calling: WebPDelete(idec).
To retrieve partially decoded picture samples, one must use the corresponding
method: WebPIDecGetRGB or WebPIDecGetYUV.
method: WebPIDecGetRGB or WebPIDecGetYUVA.
It will return the last displayable pixel row.
Lastly, note that decoding can also be performed into a pre-allocated pixel
buffer. This buffer must be passed when creating a WebPIDecoder, calling
WebPINewRGB() or WebPINewYUV().
WebPINewRGB() or WebPINewYUVA().
Please have a look at the src/webp/decode.h header for further details.