Far-East Asian language (Chinese, Japanese and Korean; CJK) needs special handling in console.
Especially a fullwidth character (mk_wcwidth_cjk(ch) == 2) needs a double width space. A fullwidth character on the console window is treated as a pair of a leading byte and a trailing byte (COMMON_LVB_LEADING_BYTE and COMMON_LVB_TRAILING_BYTE). CORE-12451
CORE-15147
- Rename CLIENTTHREADINFO::tickLastMsgChecked into timeLastRead as
documented in https://reactos.org/wiki/Techwiki:Win32k/CLIENTTHREADINFO .
This is the last time the message queue was read.
- This is the structure member one must compare against the current tick
count timestamp in order to heuristically determine whether a message
queue thread is hung!! Fix MsqIsHung() in accordance, add extra debug
logging in order to help us determining which of our code present
regular GUI hangs, and add as well an extra "TimeOut" parameter so as
not to hardcode a fixed value within that function but instead
allowing its caller to specify possible different values.
- THREADINFO::timeLast is on the contrary the last message time stamp,
and will definitively differ from CLIENTTHREADINFO::timeLastRead .
It should only be used for information purposes!
- Accordingly, in NtUserGetThreadState()::THREADSTATE_UPTIMELASTREAD
and in InitThreadCallback(), only (re-)initialize the timeLastRead
member of the CLIENTTHREADINFO structure of the THREADINFO of interest.
- In co_IntPeekMessage(), update more often the timeLastRead timestamp
whenever the current message queue has been read (but NOT timeLast!!
That one will be updated ONLY WHEN a message is found!).
- In co_IntSendMessageTimeoutSingle() first check whether the window to
which we send the message is being destroyed, before checking for
queue hangs etc. Collapse the logic checks for queue hang and increase
the hang timeout check to 4 times MSQ_HUNG (== 4 * 5 seconds) and
display a debug trace.
Make preparation for console support of Chinese, Japanese and Korean (CJK) codepages. CORE-12451
- Add consrv/frontends/wcwidth.c.
- Add GuiPaintTextModeBufferCJK function.
This is done by creating the volatile key
\Registry\Machine\System\CurrentControlSet\Control\GraphicsDrivers\BaseVideo .
Also cache during first initialization of VIDEOPRT the state of the boot
options BASEVIDEO and NOVESA, so that they can be readily retrieved later
(for example, in VideoPortIsNoVesa()).
CORE-15901
This fixes display reset transition when an external module acquired
INBV ownership and then released it, similarly to what was done in
commit 0ad65796 for VIDEOPRT.
For this a backup screenbuffer is used to store the contents of the
screen just before an INBV screen acquire transition, and these contents
are restored when it is detected that INBV ownership has been released.
Also, the active text font associated with the active console code-page
is restored, as well as the cursor state and shape.
In addition, any user of BLUE.SYS is now required to explicitly issue
a new IOCTL_CONSOLE_RESET_SCREEN to either enable or disable the screen.
This allows avoiding nasty unwanted screen mode switches when a handle
to the \Device\BlueScreen device is opened but no screen mode switch was
actually wanted - This "fixes" this annoyance on ReactOS and Windows,
when these are running witha VGA-compatible video driver and one wants
to look at properties of the \Device\BlueScreen device using
Sysinternals' WinObj.
Following this, we don't need to check anymore for explicit INBV
ownership by issuing calls to InbvCheckDisplayOwnership(), but instead
we check whether the screen has beeen manually enabled using the
aforementioned IOCTL. This partly supersedes commit 8b553a4b, and allows
fixing the second bug, namely that if we start ReactOS without the
/NOGUIBOOT option (and thus, INBV is active during boot), USETUP would
not show up anything because BLUE.SYS wouldn't display anything on screen.
See CORE-15901.
[USETUP][CONSRV] Call IOCTL_CONSOLE_RESET_SCREEN to tell BlueScreen device to enable the screen.
PR #2135 (e329e83) caused radiobutton regression. This PR will fix it.
- Clear DT_BOTTOM | DT_VCENTER flags upon calculating the button text height.
CORE-16552
By demoting good-path DPRINT1 to DPRINT.
HBelusca agreed.
The more important commit to solve CORE-16187 has
been done beforehand in 0.4.14-dev-553-g
1dcdb4c2d0
CORE-12149
VIDEOPRT:
=========
Improve interfacing with INBV, so as to detect when an external module
acquired INBV display ownership, and whether ownership is being released
later on. (This does NOT rely on hooking!)
For this purpose we improve the IntVideoPortResetDisplayParameters(Ex)
callback that gets registered with an InbvNotifyDisplayOwnershipLost()
call during initialization, and we add a monitoring thread.
The callback is called whenever an external module calls
InbvAcquireDisplayOwnership(), for example the bugcheck code or the KDBG
debugger in SCREEN mode. When this happens, a flag that tells the
monitoring thread to start monitoring INBV is set (ReactOS-specific),
and the display adapters get reset with HwResetHw() (as done on Windows).
Due to the fact that this INBV callback can be called at *ANY* IRQL, we
cannot use dispatcher synchronization mechanisms such as events to tell
the INBV monitoring thread to start its operations, so we need to rely
instead on a flag to be set. And, since INBV doesn't provide with any
proper callback/notification system either, we need to actively monitor
its state by pooling. To reduce the load on the system the monitoring
thread performs 1-second waits between each check for the flag set by
the INBV callback, and during checking the INBV ownership status.
When the INBV ownership is detected to be released by an external module,
the INBV callback is re-registered (this is *MANDATORY* since the
external module has called InbvNotifyDisplayOwnershipLost() with a
different callback parameter!), and then we callout to Win32k for
re-enabling the display.
This has the virtue of correctly resetting the display once the KDBG
debugger in SCREEN mode is being exited, and fixes CORE-12149 .
The following additional fixes were needed:
VIDEOPRT & WIN32K:
==================
Remove the registration with INBV that was previously done in a ReactOS-
specific hacked IRP_MJ_WRITE call; it is now done correctly during the
video device opening done by EngpRegisterGraphicsDevice() in the VIDEOPRT's
IRP_MJ_CREATE handler, as done on Windows.
WIN32K:
=======
- Stub the VideoPortCallout() support, for VIDEOPRT -> WIN32 callbacks.
This function gets registered with VIDEOPRT through an
IOCTL_VIDEO_INIT_WIN32K_CALLBACKS call in EngpRegisterGraphicsDevice().
- Only partially implement the 'VideoFindAdapterCallout' case, that just
re-enables the primary display by refreshing it (using the new function
UserRefreshDisplay()).
VIDEOPRT:
=========
- PVIDEO_WIN32K_CALLOUT is an NTAPI (stdcall) callback.
- In the IntVideoPortResetDisplayParameters(Ex) callback, reset all the
"resettable" adapters registered in the HwResetAdaptersList list.
We thus get rid of the global ResetDisplayParametersDeviceExtension.
- Make the IntVideoPortResetDisplayParameters(Ex) callback slightly more
robust (using SEH) against potential HwResetListEntry list corruption
or invalid DriverExtension->InitializationData.HwResetHw() that would
otherwise trigger a BSOD, and this would be disastrous since that
callback is precisely called when INBV is acquired, typically when the
BSOD code initializes the display for displaying its information...
Extras:
- Validate the IrpStack->MajorFunction in IntVideoPortDispatchDeviceControl()
and implement IRP_MJ_SHUTDOWN handling. Stub out the other IOCTLs that
are handled by VIDEOPRT only (and not by the miniports).
- VIDEOPRT doesn't require IRP_MJ_INTERNAL_DEVICE_CONTROL (unused).
- Implement IOCTL_VIDEO_PREPARE_FOR_EARECOVERY that just resets the
display to standard VGA 80x25 text mode.
