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restore encode API compatibility

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protect WebPConfigLosslessPreset/WebPMemoryWriterClear w/a
WEBP_ENCODER_ABI_VERSION check

Change-Id: If4debc15fee172a3f18079bc2bd29eb8447bc14b
This commit is contained in:
James Zern
2014-07-22 20:24:59 -07:00
parent 793368e8c6
commit c2fc52e4ec
7 changed files with 61 additions and 19 deletions
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33
man/cwebp.1
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@@ -1,5 +1,5 @@
.\" Hey, EMACS: -*- nroff -*-
.TH CWEBP 1 "April 19, 2014"
.TH CWEBP 1 "July 22, 2014"
.SH NAME
cwebp \- compress an image file to a WebP file
.SH SYNOPSIS
@@ -38,21 +38,22 @@ Print the version number (as major.minor.revision) and exit.
.BI \-q " float
Specify the compression factor for RGB channels between 0 and 100. The default
is 75.
.TP
.BI \-z " int
Switch on \fBlossless\fP compression mode with the specified level between 0
and 9, with level 0 being the fastest, 9 being the slowest. Fast mode
produces larger file size than slower ones. A good default is \-z 6.
This option is actually a shortcut for some predefined settings for quality
and method. If options \-q or \-m are subsequently used, they will invalidate
the effect of this \-z option.
.br
In case of lossy compression (default), a small factor produces a smaller file
with lower quality. Best quality is achieved by using a value of 100.
.br
In case of lossless compression (specified by the \-lossless option), a small
factor enables faster compression speed, but produces a larger file. Maximum
compression is achieved by using a value of 100.
.\" TODO(jzern): restore post-v0.4.1
.\" .TP
.\" .BI \-z " int
.\" Switch on \fBlossless\fP compression mode with the specified level between 0
.\" and 9, with level 0 being the fastest, 9 being the slowest. Fast mode
.\" produces larger file size than slower ones. A good default is \-z 6.
.\" This option is actually a shortcut for some predefined settings for quality
.\" and method. If options \-q or \-m are subsequently used, they will invalidate
.\" the effect of this \-z option.
.\" .br
.\" In case of lossy compression (default), a small factor produces a smaller file
.\" with lower quality. Best quality is achieved by using a value of 100.
.\" .br
.\" In case of lossless compression (specified by the \-lossless option), a small
.\" factor enables faster compression speed, but produces a larger file. Maximum
.\" compression is achieved by using a value of 100.
.TP
.BI \-alpha_q " int
Specify the compression factor for alpha compression between 0 and 100.