Adds support for CSS margin properties for block elements in
the text renderer. Specifically:
- This is available for block type elements only, eg DIV, P, H1-H6.
- Margins are NOT available for spans or other non-block content (due to Qt
limitations)
- Margins can be specified in pt units only
- Margins can be specified either via "margin-left: 5pt; margin-right:
10pt" etc, or "margin: 5pt 0pt 10pt 0pt"
- Negative margins are supported for the bottom margin ONLY (due to Qt
limitations)
We add a new setOutputZUp(true) option to QgsTessellator so that
the coordinates on output do not get flipped from [x,y,z] to [x,-z,y].
The default is still the old behavior with flipped axes (to make sure
we do not break the API), but all uses in the QGIS code were upgraded
to use the new option.
This means we do not need to add rotation to polygon / buffered line
symbol's 3D entities in 3D map views (and there's only translation left, yay!)
This algorithm extracts extrema (minimum and maximum) values
from a given band of the raster layer.
The output is a vector layer containing point features for
the selected extrema, at the center of the associated pixel.
If multiple pixels in the raster share the minimum or maximum
value, then only one of these pixels will be included in the output.
The algorithm uses raster iterator to remain efficient on huge
rasters, and does not require reading the entire raster to
memory
Adds support for the line-height CSS property in HTML formatted labels.
Supports line-height in either points or percent, eg "line-height:
40pt" or "line-height: 40%"
There was a previous fix for this protecting some geos calls, but
on newer GEOS versions we get crashes with other methods (eg
calculating centroid) when using geos geometries with empty
interior rings.
Avoid this by ALWAYS defaulting to skipping empty rings when
creating GEOS polygons, UNLESS explicitly asked to. Then, only
explicitly ask to do this when we are using GEOS to validate
a geometry. In all other cases we don't need or want empty rings.
