Quickest Pixel Methods

[PsyVision]

hey,

I have noticed around the following:

GetPixel / Set Pixel
GetPixelV / Set PixelV
Point / PSet

Which of these, or infact any other method the quickest for pixel operations within a picture box ?

[Zaei]

There is no GetPixelV =). SetPixelV is the fastest, because it does not return the pixel value that was replaced.

Z.

[PsyVision]

What would the Quickes Get be then ?

Zaei - You know what its for

[Zaei]

GetPixel().

Yep =).

Z.

[PsyVision]

hmmm darn thing doesnt apear to want to work on my picture box.

i declared the API then did SetPixelV picmap.hdc, x, y, picmap.forecolor

[PsyVision]

balls.

it doesnt draw coz the AutoRedraw method is on. if i turn that off it works but when the box goes off the screen it gets cleared which ent good!!

[Zaei]

Draw the pixel, then refresh.

Z.

[PsyVision]

Excellent.

Speedy app here i come lol

[PsyVision]

lol, maybe not.

Created a new project.
Added a picture box (auto redraw = false)
Added this codeChanged ScaleMode to Pixel

Private Declare Function SetPixelV Lib "gdi32" (ByVal hdc As Long, ByVal X As Long, ByVal Y As Long, ByVal crColor As Long) As Long

Private Sub Picture1_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
SetPixelV Picture1.hdc, X, Y, vbBlack
Picture1.Refresh
End Sub

Private Sub Form_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
Me.Caption = X & "  " & Y
SetPixelV Me.hdc, X, Y, vbBlack
Me.Refresh
End Sub

And nowt, wudnt draw anything.

[PsyVision]

got a way round it.

MouseDown AutoRedraw = True

Draw

MouseUp AutoRedraw = False

[PsyVision]

okay, that works all very well.

But. it only seems to take the vbWhite, vbBlack etc for the color and doesnt like it when i pass picLeft.BackColor