UpdateShroud shows up in profile reports as one of the most
active methods (2.3% CPU time, main mono thread).
This commit introduces `anyCellDirty` to indicate that at lease one
of the cells was marked as dirty.
Avoiding the need to traverse all projected cells of the map
to find any dirty cell.
This reduces the number of shroud updates by at least 50% during a
test game. I assume this is related to renders occurring more
often than logic ticks(?).
Also added a configurable deploy cursor and fixed Minelayer target cell validation checks, which should make for a much better experiencing when dragging over an area with blocking terrain, shroud, fog, etc.
The Stream.ReadByte method is implemented by allocating a 1 byte buffer and calling into Read(byte[], int, int). Override ReadByte in derived classes to avoid needing to allocate this small temp buffer.
Also, fix some bugs in the stream implementations. Remove Write capability from MergedStream that didn't make sense. Add guards into SegmentStream to ensure reads and writes belonged to the segment - otherwise a reader or writer could access regions of the base stream that were outside the intended segment.
- Use the count to size the capacity of the list.
- Use a char array as a buffer, so will can build each string directly rather than needing a ToArray call first.
- Clone method will use the node count to create the correct capacity.
- ResolveInherits will use the node count as the suggested initial capacity.
- FromStream will now stream lines, rather than reading the whole file into memory and then splitting into lines.
- Avoid creating new strings in SpriteRenderer.Flush.
- ProductionQueue.CancelUnbuildableItems can exit early if the queue is empty. It can also use a set of names for quicker lookups.
- OpenGL.CheckGLError avoids a Enum.HasFlag call.
