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man/cwebp.1: add note about crop/resize order

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+ normalize help text in [cd]webp

Bug: webp:561
Change-Id: Id92ec4228d4933cd033b2bf68a43192532cef483
This commit is contained in:
James Zern
2022-03-17 10:29:02 -07:00
parent f0e9351cce
commit 34bb332ca1
4 changed files with 12 additions and 10 deletions
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14
man/cwebp.1
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@ -1,5 +1,5 @@
.\" Hey, EMACS: -*- nroff -*-
.TH CWEBP 1 "November 17, 2021"
.TH CWEBP 1 "March 17, 2022"
.SH NAME
cwebp \- compress an image file to a WebP file
.SH SYNOPSIS
@ -90,15 +90,17 @@ additional encoding possibilities and decide on the quality gain.
Lower value can result in faster processing time at the expense of
larger file size and lower compression quality.
.TP
.BI \-resize " width height
Resize the source to a rectangle with size \fBwidth\fP x \fBheight\fP.
If either (but not both) of the \fBwidth\fP or \fBheight\fP parameters is 0,
the value will be calculated preserving the aspect\-ratio.
.TP
.BI \-crop " x_position y_position width height
Crop the source to a rectangle with top\-left corner at coordinates
(\fBx_position\fP, \fBy_position\fP) and size \fBwidth\fP x \fBheight\fP.
This cropping area must be fully contained within the source rectangle.
Note: the cropping is applied \fIbefore\fP any scaling.
.TP
.BI \-resize " width height
Resize the source to a rectangle with size \fBwidth\fP x \fBheight\fP.
If either (but not both) of the \fBwidth\fP or \fBheight\fP parameters is 0,
the value will be calculated preserving the aspect\-ratio. Note: scaling
is applied \fIafter\fP cropping.
.TP
.B \-mt
Use multi\-threading for encoding, if possible.