With this change, a client (i.e., display driver) can register
a wakeup signal handler to be notified on the arrival of new data to
capture. The signal is delivered only when the client has stopped
capturing. The client propagates this condition to the server using
the new 'capture_stopped' RPC call.
This change in principle enables a display driver to suspend its
periodic mode of operation after a few frames without capturing any
new data. As the first driver, the fb_sdl driver has been adapted to
the new protocol. This change not only eliminates the driver's CPU
load when idle, it also reduces the latency of sporadic output
because the response to such GUI updates is no longer bound by a
fixed periodic interval.
Issue #5344
This patch is a preparatory step for relaxing the strictly periodic
operation of fb_sdl. With the new design, the SDL event loop can block
for events while Genode's main entrypoint stays receptive for I/O.
The main entrypoint can interact with the SDL thread by injecting
SDL user events.
The patch also replaces the full-screen clearing and update of the
SDL window by an update of the captured bounding box only. This reduces
the CPU load of fb_sdl when idle. When updating a small part of the
screen (e.g., when moving the mouse only), the load is still rather
heavy though.
Issue #5344
This patch adds the physical screen size as argument to the
Capture::Session::buffer RPC function, which allows drivers to
propagate DPI information to the GUI server. While changing the
the interface, the patch replaces the former use of C++ exceptions
by a result type. The 'Buffer_result' is handled transparently by the
Capture::Connection. The client.h code is now integrated in
connection.h.
Issue #5344
- Remove exceptions
- Use 'Attr' struct for attach arguments
- Let 'attach' return 'Range' instead of 'Local_addr'
- Renamed 'Region_map::State' to 'Region_map::Fault'
Issue #5245Fixes#5070
With libxml2 >= 2.13, the `-path` argument can no longer be used for
setting search paths for xsd files. Instead, we use an XML catalog to
replace genode:// URIs with absolute paths.
Fixes#5248
This patch replaces exceptions of the PD session RPC interface with
result types.
The change of the quota-transfer RPC functions required the adaptation
of base/quota_transfer.h and base/child.h.
The 'alloc_signal_source' method has been renamed to 'signal_source'
to avoid an exceedingly long name of the corresponding result type.
The Pd_session::map function takes a 'Virt_range' instead of basic-type
arguments.
The 'Signal_source_capability' alias for 'Capability<Signal_source>' has
been removed.
Issue #5245
Reserved memory regions must be excluded from the corresponding DMA
allocators irrespective of whether the device is in use. Otherwise, an
early allocation of DMA buffers may use the reserved memory regions of a
late acquired device.
Fixes#5232
- Move header to base/include to make it applicable for base types
like 'Affinity' down the road.
- Represent 'Rect' as typle of point and area, which is the most
common form of initialization, creates in valid 'Rect' by default.
- Turn Point, Area, and Rect into compound types, making x, y, w, h, at,
area accessible without a method call
- 'Rect::Compound' function for constructing a 'Rect' from two points,
replacing a former constructor
- Use result type 'Rect::Cut_remainder' instead of out parameters.
Fixes#5239
