It is possible for a PaintTask to start exiting soon after sending new
buffers to the compositor. In that case, the compositor should return
the now unnecessary buffers to the PaintTask so that it can properly
free them.
To accomplish this, the compositor now keeps a hash map of paint task
channels per pipeline id. When a PaintTask exists, the constellation
informs the compositor that it can forget about it. Additionally, the
PaintTask should not wait for any buffers when the engine is doing a
complete shutdown. In that case, the compositor is already halted and
has simply let all buffers leak. We pipe through the shutdown type when
destroying the pipeline to make this decision.
Fixes#2641.
Accepted and closed incoming streams
Added header to for constant use.
Removed extra spaces.
Corrected spacing to conform to coding standards.
Corrected spacing to conform to coding standards.
Corrected spacing to conform with coding standards.
Moving new import next to old import for devtools_traits as specified in comment.
Removed method definition to include as inline code and changed to iter_mut.
Using loops to exit devtools on server exit message and disconnected message to simply break as suggested in the comment.
Removing TODO comment for completed functionality.
Moved the operation for exit of devtools on servo closing outside the match loop.
Removing trailing ';' and adding new line before connection closing loop.
This allows the compositor to add frames after the call to SetIds,
where the initial frame tree is created. There are still some issues
preventing proper late frame creation, but this prevents crashes when
it happens.
Fixes#3738.
