Previously, when marker or hash lines were rendered using interval
or center point place placement, the symbol angles were determined
by taking the exact line orientation at the position of the symbol.
This often leads to undesirable rendering effects, where little
jaggies or corners in lines which occur at the position of the
symbol cause the marker or hash line to be oriented at a very
different angle to what the eye expects to see.
With this new option, the angle is instead calculated by averaging
the line over a specified distance either side of the symbol. E.g.
averaging the line angle over 4mm means we take the points along
the line 2mm from either side of the symbol placement, and use these
instead to calculate the line angle for that symbol. This has the
effect of smoothing (or removing) any tiny local deviations from
the overall line direction, resulting in much nicer visual
orientation of marker or hash lines.
Like all symbol settings, the average angle smoothing distance
can be set using mm/pixels/map units/etc, and supports data-defined
values.
Closed rings also correctly consider wrapping around these average
angles from the start/end vertex.
(Sponsored by an anonymous corporate backer)
If the group (or the root) has any queryable child, it is flagged as queryable
Also fixes an issue with json enconding with rasters.
Fixes#21697
Funded by: Kanton Zug
In QGIS 3.4, Selection can be printed in Image output and not in PDF or SVG output.
A fix has been done 2752f83 to fix inconsistent use of layout render context flags, and draw selection is activated with a flag.
The CRS parameter is considered as mandatory in GetFeatureInfo even if the FILTER parameter is used without I and J parameters.
To fix it, set a fake CRS in the parameter when I/J and X/Y parameters are not defined and FILTER parameter is defined.
In QGIS Server 2.* the WMS GetPrint request could genrate JPEG image. QGIS Server 3.4 has lost this capabilities.
```
<ServiceExceptionReport xmlns="http://www.opengis.net/ogc" version="1.3.0" capture-installed="true">
<ServiceException code="InvalidFormat">
Output format jpg is not supported by the GetPrint request
</ServiceException>
</ServiceExceptionReport>
```
To fix this regression, it is necessary to accept JPEG output format.
And to avoid this regression to come back, the QGIS Server tests has been updated to accept jpg image test.
implements Processing providers
Plugins which implement providers should include the
hasProcessingProvider=yes
line within their metadata.txt file. This allows for rapid
identification of all plugins which implement Processing
functionality.
This command adds a plugin to active plugins and calls initProcessing(),
initializing only Processing related components of that plugin.
The new initProcessing() hook should be implemented by plugins
which provide Processing providers or algorithm, and should only
implement code which is required to load the provider and algorithms.
Strictly no GUI related code should be used here, that MUST
be moved out of initializers and deferred to the plugin's
initGui implementation.
