Whilst working on a new video device I ran into a few problems with the
LKxxx keyboard and I noticed there are already some open issues against
the keyboard and mouse devices. These changes should resolve#320 and
may help with #272 (although I think that is an SDL issue). I've tested these
changes with VWS, UWS and DECwindows with both captured and
uncaptured input modes.
When PNG support is available, both .png and .bmp screenshots can be
generated based on the file extension specified by the user on the SCREENSHOT
command. If no extension is specified, then a PNG format screenshot will be
produced.
Reworked all priority adjustment code to leverage a new
sim_os_set_thread_priority API which is coded to use pthreads or OS
priority adjustment APIs as necessary.
These changes facilitate more robust parameter type checking and helps
to identify unexpected coding errors.
Most simulators can now also be compiled with a C++ compiler without
warnings.
Additionally, these changes have also been configured to facilitate easier
backporting of simulator and device simulation modules to run under the
simh v3.9+ SCP framework.
Using SDL2 the draw operations are performed in a separate thread and thus the data must be cached while the request is passed to the separate thread while control returns to the caller.
VIDEO:
- Make mouse motion activity consistent with SDL relative direction. Add error output when mouse events are discarded due to queue full.
If a client application delivers motion information in a different relative sense, then that application needs to make the adjustments from the SDL standard direction.
- Added SHOW dev VIDEO capability to describe the underlying SDL video capabilities of the current SDL library and host execution environment.
- Force software based rendering under SDL2. Enhanced debug info.
- Added host OS cursor integration support.
- Reorganize libSDL vs libSDL2 version implementation to leverage common logic without replication.
QVSS:
- Coalesced adjacent screen row updates to minimize vid_draw operations
- Report all relative mouse motion in the mouse position register AND mouse motion data.
- Added debugging information for cursor and scan line map updates
- Add option "SET QVSS CAPTURED" to force capture input mode.
The goals here being to simplify calling code while getting consistent output delivered everywhere it may be useful.
Modified most places which explicitly used sim_log or merely called printf to now avoid doing that and merely call sim_printf().
