Only update value and footprint fields from instance data if it's not
empty. These fields were not always stored in the instance data so
loading them from instance data that does not contain them will clear
the fields.
https://gitlab.com/kicad/code/kicad/-/issues/13735
Internal routines have no need for locking the mutex they already own.
While external routines that want to recalculate the Ratsnest do need an
exclusive lock before being allowed access
Fixes https://gitlab.com/kicad/code/kicad/issues/13011
Rather than update library symbols one at a time, queue them up by
schematic symbol to prevent multiple updates to the same symbol in
complex hierarchies. This also removes all of the library symbols
first which will clear out all of the library symbol variants that
were created by modifying library symbols in place and/or changes to
the symbol in the library.
Don't add new variant library symbol if an equivalent variant already
exists in the schematic local cache. This prevents duplicate library
symbols from being added to the local cache when the first variant in
the cache does not match that of the symbol being added.
Just testing a single point to find copper that is outside the board works
until the arc->segment conversion moves the board outline just enough to
have the filled copper slightly (few IU) outside of the converted outline.
Instead, we do an expensive check of comparing the size of the
intersection between the island and the island's intersection with the
board. If the intersection is at least half as large as the original
island, we can say with certainty that the island is inside. The margin
could be much smaller than half but this preserves the intent without
picking an arbitrary number that might be violated
Fixes https://gitlab.com/kicad/code/kicad/issues/13717
The polygon conversion algorithm mistakenly stored the stroke width of
filled polygons in an integer variable. As a result, all stroke widths
were rounded down to the next smaller integer mm size. This commit changes
the types in the relevant functions and variables from int to double.
Nanosvg assumes that an unspecified stroke width is 1px, whereas the SVG
specification specifies it should be read as 0px. This causes problems
when scaling factors are applied to 0px lines, leading to them being
misinterpeted by our import.
This commit fixes the nanosvg assumption by setting the initial stroke
width to 0 instead of 1px.
Fixes: https://gitlab.com/kicad/code/kicad/-/issues/13353
Also ensure that calculated areas for island removal are absolute.
The on-outline zone can happen when the clearance to the edge is
particularly small.
Fixes https://gitlab.com/kicad/code/kicad/issues/13717