man/cwebp.1, cosmetics: escape '-'s

+ consistently make references to switches bold
+ add the default for -pass

Change-Id: I84abd9c0c878f8804c0f5dec806ca654e00b6661

man/cwebp.1

@@ -1,5 +1,5 @@
 .\"                                      Hey, EMACS: -*- nroff -*-
-.TH CWEBP 1 "November 02, 2015"
+.TH CWEBP 1 "November 03, 2015"
 .SH NAME
 cwebp \- compress an image file to a WebP file
 .SH SYNOPSIS
@@ -23,7 +23,7 @@ Using "\-" as output name will direct output to 'stdout'.
 .TP
 .BI \-\- " string
 Explicitly specify the input file. This option is useful if the input
-file starts with an '\-' for instance. This option must appear \fBlast\fP.
+file starts with a '\-' for instance. This option must appear \fBlast\fP.
 Any other options afterward will be ignored.
 .TP
 .B \-h, \-help
@@ -39,7 +39,7 @@ Print the version number (as major.minor.revision) and exit.
 Encode the image without any loss.
 .TP
 .BI \-near_lossless " int
-Use near-lossless image preprocessing. This option adjusts pixel values
+Use near\-lossless image preprocessing. This option adjusts pixel values
 to help compressibility, but has minimal impact on the visual quality.
 It triggers lossless compression mode automatically.
 Range is 0 (maximum preprocessing) to 100 (no preprocessing, the default).
@@ -51,17 +51,17 @@ is 75.
 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
+In case of lossless compression (specified by the \fB\-lossless\fP option), a
-factor enables faster compression speed, but produces a larger file. Maximum
+small factor enables faster compression speed, but produces a larger file.
-compression is achieved by using a value of 100.
+Maximum compression is achieved by using a value of 100.
 .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.
+produces larger file size than slower ones. A good default is \fB\-z 6\fP.
 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
+and method. If options \fB\-q\fP  or \fB\-m\fP are subsequently used, they will
-the effect of this \-z option.
+invalidate the effect of this option.
 .TP
 .BI \-alpha_q " int
 Specify the compression factor for alpha compression between 0 and 100.
@@ -69,7 +69,7 @@ Lossless compression of alpha is achieved using a value of 100, while the lower
 values result in a lossy compression. The default is 100.
 .TP
 .BI \-preset " string
-Specify a set of pre-defined parameters to suit a particular type of
+Specify a set of pre\-defined parameters to suit a particular type of
 source material. Possible values are:  \fBdefault\fP, \fBphoto\fP,
 \fBpicture\fP, \fBdrawing\fP, \fBicon\fP, \fBtext\fP. Since
 \fB\-preset\fP overwrites the other parameters' values (except the
@@ -88,15 +88,15 @@ larger file size and lower compression quality.
 .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.
+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
+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.
 .TP
 .B \-mt
-Use multi-threading for encoding, if possible. This option is only effective
+Use multi\-threading for encoding, if possible. This option is only effective
 when using lossy compression on a source with a transparency channel.
 .TP
 .B \-low_memory
@@ -125,11 +125,11 @@ close as possible to this target.
 .TP
 .BI \-pass " int
 Set a maximum number of passes to use during the dichotomy used by
-options \fB\-size\fP or \fB\-psnr\fP. Maximum value is 10.
+options \fB\-size\fP or \fB\-psnr\fP. Maximum value is 10, default is 1.
 .TP
 .B \-af
-Turns auto-filter on. This algorithm will spend additional time optimizing
+Turns auto\-filter on. This algorithm will spend additional time optimizing
-the filtering strength to reach a well-balanced quality.
+the filtering strength to reach a well\-balanced quality.
 .TP
 .B \-jpeg_like
 Change the internal parameter mapping to better match the expected size
@@ -162,7 +162,7 @@ Disable strong filtering (if filtering is being used thanks to the
 .TP
 .BI \-sns " int
 Specify the amplitude of the spatial noise shaping. Spatial noise shaping
-(or \fBsns\fP for short) refers to a general collection of built-in algorithms
+(or \fBsns\fP for short) refers to a general collection of built\-in algorithms
 used to decide which area of the picture should use relatively less bits,
 and where else to better transfer these bits. The possible range goes from
 0 (algorithm is off) to 100 (the maximal effect). The default value is 80.
@@ -176,21 +176,21 @@ is used.
 .BI \-partition_limit " int
 Degrade quality by limiting the number of bits used by some macroblocks.
 Range is 0 (no degradation, the default) to 100 (full degradation).
-Useful values are usually around 30-70 for moderately large images.
+Useful values are usually around 30\-70 for moderately large images.
-In the VP8 format, the so-called control partition has a limit of 512k and
+In the VP8 format, the so\-called control partition has a limit of 512k and
 is used to store the following information: whether the macroblock is skipped,
 which segment it belongs to, whether it is coded as intra 4x4 or intra 16x16
-mode, and finally the prediction modes to use for each of the sub-blocks.
+mode, and finally the prediction modes to use for each of the sub\-blocks.
 For a very large image, 512k only leaves room to few bits per 16x16 macroblock.
 The absolute minimum is 4 bits per macroblock. Skip, segment, and mode
 information can use up almost all these 4 bits (although the case is unlikely),
 which is problematic for very large images. The partition_limit factor controls
-how frequently the most bit-costly mode (intra 4x4) will be used. This is
+how frequently the most bit\-costly mode (intra 4x4) will be used. This is
 useful in case the 512k limit is reached and the following message is displayed:
 \fIError code: 6 (PARTITION0_OVERFLOW: Partition #0 is too big to fit 512k)\fP.
-If using \fB-partition_limit\fP is not enough to meet the 512k constraint, one
+If using \fB\-partition_limit\fP is not enough to meet the 512k constraint, one
 should use less segments in order to save more header bits per macroblock.
-See the \fB-segments\fP option.
+See the \fB\-segments\fP option.
 
 .SS LOGGING OPTIONS
 These options control the level of output:
@@ -199,7 +199,7 @@ These options control the level of output:
 Print extra information (encoding time in particular).
 .TP
 .B \-print_psnr
-Compute and report average PSNR (Peak-Signal-To-Noise ratio).
+Compute and report average PSNR (Peak\-Signal\-To\-Noise ratio).
 .TP
 .B \-print_ssim
 Compute and report average SSIM (structural similarity
@@ -219,7 +219,7 @@ Do not print anything.
 Only print brief information (output file size and PSNR) for testing purpose.
 .TP
 .BI \-map " int
-Output additional ASCII-map of encoding information. Possible map values
+Output additional ASCII\-map of encoding information. Possible map values
 range from 1 to 6. This is only meant to help debugging.
 
 .SS ADDITIONAL OPTIONS
@@ -227,12 +227,12 @@ More advanced options are:
 .TP
 .BI \-s " width height
 Specify that the input file actually consists of raw Y'CbCr samples following
-the ITU-R BT.601 recommendation, in 4:2:0 linear format.
+the ITU\-R BT.601 recommendation, in 4:2:0 linear format.
 The luma plane has size \fBwidth\fP x \fBheight\fP.
 .TP
 .BI \-pre " int
-Specify some pre-processing steps. Using a value of '2' will trigger
+Specify some preprocessing steps. Using a value of '2' will trigger
-quality-dependent pseudo-random dithering during RGBA->YUVA conversion
+quality\-dependent pseudo\-random dithering during RGBA\->YUVA conversion
 (lossy compression only).
 .TP
 .BI \-alpha_filter " string
@@ -241,7 +241,7 @@ Specify the predictive filtering method for the alpha plane. One of 'none',
 \&'fast'. Internally, alpha filtering is performed using four possible
 predictions (none, horizontal, vertical, gradient). The 'best' mode will try
 each mode in turn and pick the one which gives the smaller size. The 'fast'
-mode will just try to form an a-priori guess without testing all modes.
+mode will just try to form an a priori guess without testing all modes.
 .TP
 .BI \-alpha_method " int
 Specify the algorithm used for alpha compression: 0 or 1. Algorithm 0 denotes
@@ -279,7 +279,7 @@ Please report all bugs to our issue tracker:
 https://bugs.chromium.org/p/webp
 .br
 Patches welcome! See this page to get started:
-http://www.webmproject.org/code/contribute/submitting-patches/
+http://www.webmproject.org/code/contribute/submitting\-patches/
 
 .SH EXAMPLES
 cwebp \-q 50 -lossless picture.png \-o picture_lossless.webp