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upright=XXX_only

herm 2013-04-01 17:48:48 -07:00
parent 43cd977dd7
commit 93efb99079
1 changed files with 11 additions and 1 deletions
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TextSymbolizer.md

@ -34,7 +34,7 @@
|orientation||Rotate text|degree|0|
|placement-type||Placement finder algorithm. Currently supported: "dummy" (do nothing), "simple" (automatically create new positions using a simple configuration; see below) and "list" (mapnik >=2.1, see below)|string|"dummy"|2.0/2.1
|placements||List of possible placements. Only valid if placement-type="simple" is used.|string|"X"|2.0
|upright|left,right,auto|Select which way direction is used to place characters upright.|-|auto|harfbuzz
|upright|left,right,auto,left_only,right_only|Select which way direction is used to place characters upright. The XXX_only variant place text only if more than 50% of all character are upright. Together with placement-type="list" this can be used to implement alternate texts. See below for an example. |-|auto|harfbuzz
|clip|true, false|If true then the geometry is clipped to the view before doing placements. Improves performance but can cause bad placements when the results are used for tiling|bool|true|2.0.0|
|rotate-displacement|Rotates the displacement around the placement origin by the angle given by "orientation"|bool|false|harfbuzz|
@ -150,6 +150,16 @@ becomes
This change was made to be forward compatible with changes to text formatting being introduced in later versions.
## Alternate texts for upside down rendering
If some of your text depends on the line direction you need to supply different texts for each direction. This can be done like this:
```xml
<TextSymbolizer face-name="DejaVu Sans Book" size="10"
placement="line" upright="left_only" placement-type="list">
"left only &lt;--"
<Placement upright="right_only">"right only --&gt;"</Placement>
</TextSymbolizer>
```
## New features in HarfBuzz branch
* upright="auto/left/right" (See table above)
* dx is also used for line placements