Graphics.DrawImage is slow?

[Cesar Ronchese]

Hey!

I'm printing some stuff in a memory-created bitmap (format
Imaging.PixelFo rmat.Format16bp pRgb565) and, at the end, copying the bitmap
to graphic device of my UserControl.

I noticed that method is not too fast to draw from my memory bitmap. In
medium, is taking 0.015 seconds to execute on a Pentium 2.26 GH, 512 RAM,
Windows 2K, with almost 1024x768 resolution area.

There are some advice concerning speed up it?

Cesar


Ps.: piece of code:

mBmp = New Bitmap(Me.Width , Me.Height,
Imaging.PixelFo rmat.Format16bp pRgb565)
g = Graphics.FromIm age(mBmp)
(...)
e.Graphics.Draw Image(mBmp, New Point(0, 0))
g.Dispose()

[Herfried K. Wagner [MVP]]

Re: Graphics.DrawIm age is slow?

"Cesar Ronchese" <ronchese*smlin fo.com.br> schrieb:[color=blue]
> I'm printing some stuff in a memory-created bitmap (format
> Imaging.PixelFo rmat.Format16bp pRgb565) and, at the end, copying the bitmap
> to graphic device of my UserControl.
>
> I noticed that method is not too fast to draw from my memory bitmap. In
> medium, is taking 0.015 seconds to execute on a Pentium 2.26 GH, 512 RAM,
> Windows 2K, with almost 1024x768 resolution area.[/color]

Use 'DrawImageUnsca led' if no scaling should be performed.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

[Cesar Ronchese]

Re: Graphics.DrawIm age is slow?

Yeah, I used that too. But that 0.015 seconds still almost the same.



"Herfried K. Wagner [MVP]" <hirf-spam-me-here@gmx.at> wrote in message
news:ekw2%239Fw FHA.256@TK2MSFT NGP15.phx.gbl.. .
"Cesar Ronchese" <ronchese*smlin fo.com.br> schrieb:[color=blue]
> I'm printing some stuff in a memory-created bitmap (format
> Imaging.PixelFo rmat.Format16bp pRgb565) and, at the end, copying the bitmap
> to graphic device of my UserControl.
>
> I noticed that method is not too fast to draw from my memory bitmap. In
> medium, is taking 0.015 seconds to execute on a Pentium 2.26 GH, 512 RAM,
> Windows 2K, with almost 1024x768 resolution area.[/color]

Use 'DrawImageUnsca led' if no scaling should be performed.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

[Dennis]

Re: Graphics.DrawIm age is slow?

If you want speed, you can copy a bitmap image to another bitmap using the
WinAPI bitblt function...it's very quick.
--
Dennis in Houston


"Cesar Ronchese" wrote:
[color=blue]
> Yeah, I used that too. But that 0.015 seconds still almost the same.
>
>
>
> "Herfried K. Wagner [MVP]" <hirf-spam-me-here@gmx.at> wrote in message
> news:ekw2%239Fw FHA.256@TK2MSFT NGP15.phx.gbl.. .
> "Cesar Ronchese" <ronchese*smlin fo.com.br> schrieb:[color=green]
> > I'm printing some stuff in a memory-created bitmap (format
> > Imaging.PixelFo rmat.Format16bp pRgb565) and, at the end, copying the bitmap
> > to graphic device of my UserControl.
> >
> > I noticed that method is not too fast to draw from my memory bitmap. In
> > medium, is taking 0.015 seconds to execute on a Pentium 2.26 GH, 512 RAM,
> > Windows 2K, with almost 1024x768 resolution area.[/color]
>
> Use 'DrawImageUnsca led' if no scaling should be performed.
>
> --
> M S Herfried K. Wagner
> M V P <URL:http://dotnet.mvps.org/>
> V B <URL:http://classicvb.org/petition/>
>
>
>[/color]