This allows the CRS for map items to differ from the canvas/project
CRS. It also allows different map items to have different CRS,
eg an overview map can be set to a different CRS to the main map.
An unfortunate side effect of this change and the ongoing work
to separate compositions from canvas is that datum transforms
are no longer supported in composer. This cannot be fixed until
the datum transform store is rewritten to not depend on canvas
(ie, it's also broken for upcoming multi-canvas work)
The commit d44f1eba2fed18b3fef8d8865d79b3b6d8bc4d69 seems to break some WMS 1.3.0 client and WMS compliancy.
The commit d44f1eba2fed18b3fef8d8865d79b3b6d8bc4d69 has been written to fix an issue with QGIS WMS Client and to render image like other WMS Server.
This commit has been written to fix issue introduce by d44f1eba2fed18b3fef8d8865d79b3b6d8bc4d69.
It is based on MapServer code:
* https://github.com/mapserver/mapserver/blob/master/mapdraw.c#L115
* https://github.com/mapserver/mapserver/blob/master/HISTORY.TXT#L3768
And take account of axis invertion for output CRS.
Moves all the drawing code out of labeling into a new class
which just handles rendering text. This allows other parts
of the code to utilise all the advanced formatting options
that labeling supports, eg rendering text with shadows,
buffers and backgrounds.
If the layer has only one legend node, it is embedded in parent.
In QGIS Server the user can specify no layer title, so the layer title has not be displayed.
Adds a new checkbox at the bottom of each symbol layer's
properties which allows you to control whether the layer is
enabled or not.
Disabled layers are not drawn, but are saved and can be
enabled at a later stage.
This makes it easier to tweak symbol appearance without
having to totally delete a symbol layer.
Tested with a release binary and Swiss OSM roads in PostGIS at several zoom
levels (the higher, the less features), values in ms (average over at
least 100 queries):
Level | Before | After | % improvement
-------------------------------------------
7 | 37 | 36 | 2.7
6 | 41 | 38 | 7.32
5 | 48 | 46 | 4.17
4 | 70 | 64 | 8.57
3 | 114 | 109 | 4.39
Not much improvement (I'm quite dispointed, here), but not much change in
the code.
