microsoft.public.dotnet.framework.drawing

Jorge Paredes

12/28/2004 10:33:00 PM

Thanks, Bob!

I'll try to do the image processing by myself, I don't want to use GDI+
I had many performance problems when I start to use GDI+.
By the way, excelent web site!, I used much information that you put in
there
in my learning of C# and GDI+.

Jorge Paredes


"Bob Powell [MVP]" <bob@_spamkiller_bobpowell.net> escribió en el mensaje
news:uD0pcnS7EHA.3076@TK2MSFTNGP15.phx.gbl...
> GDI+ provides the interpolation mode which is what is responsible for
> providing the smoothing of images by bilinear or bicubic interpolation. If
> you want to do this in GDI you have to do all of the image processing
> yourself. There are no API functions that do it.
>
>
> --
> Bob Powell [MVP]
> Visual C#, System.Drawing
>
> Find great Windows Forms articles in Windows Forms Tips and Tricks
> http://www.bobpowell.net/tips...
>
> Answer those GDI+ questions with the GDI+ FAQ
> http://www.bobpowell.net/f...
>
> All new articles provide code in C# and VB.NET.
> Subscribe to the RSS feeds provided and never miss a new article.
>
>
>
>
>
> "Jorge Carlos Paredes Jimenez" <jparedes@winstondata.com> wrote in message
> news:OlctoZQ7EHA.2876@TK2MSFTNGP12.phx.gbl...
> > Hi everybody
> >
> > I'm working with TIFF B&W images in C#, for best performance
> > I'm using GDI instead of GDI+.
> > I'm using BitBlt and StretchBlt.
> >
> > The problem is that when I "paint" the image with StretchBlt or BitBlt
> > the image is not "Smooth", when I "paint" the image with DrawImage
> > the Image is "Smooth".
> >
> > Here I'm sending an example.
> > The image in top was "painted" with StretchBlt, the image on bottom
> > is viewed with Image and Fax Viewer of WXP that has the same result
> > that "paint" the image with Graphics.DrawImage.
> >
> > Somebody knows how to do the same effect with GDI or GDI+ without
> > using DrawImage?
> > The idea is process or apply some filter to the bitmap in memory and
then
> > draw with StretchBlt
> >
> > Thanks in advance!!
> >
> > Jorge Paredes
> >
> >
> >
> >
> >
> >
> >
>
>