svn commit: r316642 - head/sys/dev/syscons

[Andrey Chernov]

On 09.04.2017 7:54, Andrey Chernov wrote:
> On 08.04.2017 13:00, Bruce Evans wrote:
>> Log:
>>   Quick fix for removal of the mouse cursor in vga direct graphics modes
>>   (that is, in all supported 8, 15, 16 and 24-color modes).  Moving the
>>   mouse cursor while holding down a button (giving cut marking) left a
>>   trail of garbage from misremoved mouse cursors (usually colored
>>   rectangles and not cursor shapes).  Cases with a button not held down
>>   worked better and may even have worked.
>>   
>>   No renderer support for removing (software) mouse cursors is needed
>>   (and many renderers don't have any), since sc_remove_mouse_image()
>>   marks for update the region containing the image and usually much
>>   more.  The mouse cursor can be (partially) over as many as 4 character
>>   cells, and removing it in only the 1-4 cells occupied by it would be
>>   best for efficiency and for avoiding flicker.  
> 
> Please don't forget that this 5 cells range (0xd0-0xd4, last one becomes
> SC_CURSOR_CHAR) can be redefined with "vidcontrol -M", it is needed for
> the case they overlap valid characters region for some code tables.

Probably we just can change default to remove additional vidcontrol -M
setup. I usually have this range started with 0x03.