cool anti-mouse lag plan!

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Grey Alien

OK I can 100% confirm that that all input (e.g. keys) is affected because it's a rendering lag, and that I was chasing a wild goose when just thinking of it as mouse lag.

Try this code:

'low poly and high fill rate causes the issue, solvable by flushing the driver's
'buffered frames using grab pixmap or locking a buffer with a large speed penalty.
'opengl is unaffected.

'change how many loops you do till you see the lag and not general slowdown
'this will vary from pc to pc

'SetGraphicsDriver GLMax2DDriver()
Graphics 800,600,0

AutoMidHandle True
image:TImage = LoadImage("arrow.bmp") 'any 32x32 image

Local fix = 0

mx = 300
my = 200

While Not KeyHit(KEY_ESCAPE)
  Cls
  
  If KeyHit(KEY_SPACE) Then fix = 1 - fix
  
  If KeyDown(KEY_Z) Then mx = mx - 10
  If KeyDown(KEY_X) Then mx = mx + 10
  
  SetScale 8,8
  For i = 0 To 1000
    DrawImage image,mx,my
  Next
  
  SetScale 1, 1
  DrawText "Fix = " + fix, 12, 12
  
  Flip
  
  If fix
    If TD3D7Max2DDriver(_max2dDriver)
      While DDERR_WASSTILLDRAWING = PrimaryDevice.PrimarySurface.GetBltStatus(DDGBS_ISBLTDONE) ; Wend
    EndIf
  EndIf
Wend
End

It clearly shows there is a lag when using keys too, and that the fix works!