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Add whitespace_height to zint_symbol (vertical whitespace)

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gitlost 2021-05-25 20:42:26 +01:00
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docs/manual.txt
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@ -384,12 +384,24 @@ This specifies a symbol height of 100 times the X-dimension of the symbol.
4.5 Adjusting whitespace
------------------------
The amount of whitespace to the left and right of the generated barcode can be
altered using the –w switch. For example:
The amount of horizontal whitespace to the left and right of the generated
barcode can be altered using the –w or --whitesp switch. For example:
zint -w 10 -d "This Text"
This specifies a whitespace width of 10 times the X-dimension of the symbol.
This specifies a whitespace width of 10 times the X-dimension of the symbol
both to the left and to the right of the barcode.
The amount of vertical whitespace above and below the barcode can be altered
using the --vwhitesp switch. For example for 3 times the X-dimension:
zint --vwhitesp 3 -d "This Text"
Note that the whitespace at the bottom appears below the text, if any.
Horizontal and vertical whitespace can of course be used together:
zint -b DATAMATRIX --whitesp 1 --vwhitesp 1 -d "This Text"
4.6 Adding boundary bars and boxes
----------------------------------
@ -397,17 +409,20 @@ Zint allows the symbol to be bound with 'boundary bars' (also known as 'bearer
bars') using the option --bind. These bars help to prevent misreading of the
symbol by corrupting a scan if the scanning beam strays off the top or bottom of
the symbol. Zint can also put a border right around the symbol and its
whitespace with the --box option.
horizontal whitespace with the --box option.
The width of the boundary or box can be specified using the --border switch.
For example:
zint --box --border=10 -d "This"
zint --box --border=10 -w 10 -d "This"
gives a box with a width 10 times the X-dimension of the symbol.
gives a box with a width 10 times the X-dimension of the symbol. Note that when
specifying a box, horizontal whitespace is usually required in order to create a
quiet zone between the barcode and the sides of the box.
These options are ignored for Code 16k, Code 49 and Codablock-F. Special
considerations apply to ITF-14 - see the specific section for that symbology.
Code 16k, Code 49 and Codablock-F always have boundary bars, and default to
particular horizontal whitespace values. Special considerations apply to ITF-14
- see the specific section 6.1.2.6 for that symbology.
4.7 Using colour
----------------
@ -465,14 +480,14 @@ multiple of the default X-dimension. The scale is multiplied by 2 before being
applied. The default scale is 1.
For raster output, the default X-dimension is 2 pixels (except for MaxiCode, see
4.9.2 below, and dotty mode, see 4.14). For example for PNG images a scale of 5
will increase the X-dimension to 10 pixels. Scales should be given in increments
of 0.5, i.e. 0.5, 1, 1.5, 2, 2.5, 3, 3.5, etc., to avoid the X-dimension
varying across the symbol due to interpolation. 0.5 increments are also faster
to render.
4.9.2 below). For example for PNG images a scale of 5 will increase the
X-dimension to 10 pixels. Scales should be given in increments of 0.5, i.e. 0.5,
1, 1.5, 2, 2.5, 3, 3.5, etc., to avoid the X-dimension varying across the symbol
due to interpolation. 0.5 increments are also faster to render.
The minimum scale for non-dotty raster output is 0.5, giving a minimum
X-dimension of 1 pixel, and text will not be printed for scales less than 1.
The minimum scale for raster output in dotty mode is 1 (see 4.14).
The minimum scale for vector output is 0.1, giving a minimum X-dimension of 0.2.
@ -762,7 +777,7 @@ matrix symbologies, and is automatically selected for DotCode. The size of
the dots can be adjusted using the --dotsize= option followed by the radius
of the dot, where that radius is given as a multiple of the X-dimension. The
minimum dot size is 0.01, the maximum is 20. The default and minimum scale for
raster output in dotty mode is 2.
raster output in dotty mode is 1.
4.15 Help options
-----------------
@ -966,7 +981,8 @@ Variable Name | Type | Meaning | Default Value
symbology | integer | Symbol to use (see section | BARCODE_CODE128
| | 5.7). |
height | integer | Symbol height. [1] | 50
whitespace_width | integer | Whitespace width. | 0
whitespace_width | integer | Horizontal whitespace width.| 0
whitespace_height | integer | Vertical whitespace height. | 0
border_width | integer | Border width. | 0
output_options | integer | Set various output file | 0 (none)
| | parameters (see section |