GDI+ Scaling all wrong?

[Chinners]

Hi Group, I have a little app that loads a PNG image (128x128x32), and draws it to another canvas, with scaling. The destination size is 512x512, and, using VB.net, I use the commands (g is a graphics Canvas)

g.FillRectangle(Brushes.White, New Rectangle(0, 0, 512, 512))
g.DrawImage(Img, 0, 0, 512, 512)

However, the image drawn to the canvas is more like 560x560 pixels. Does anyone know why this is happening? The source image is definately 128x128, and is 72dpi... although this shouldnt affect anything... should it? Thanks, Jason

[leppie]

How about trying DrawImageUnscaled?

xacc.ide - now with TabsToSpaces support
IronScheme - 1.0 alpha 4a out now (29 May 2008)

[Chinners]

Hi Leppie, That wont work - I need the image scaling. Looking around a bit, I think that GDI+ is being too clever. I noticed that the PNGs that didnt work well had a different Dots-per-inch setting to ones that did. So, I suppose I aught to amend my question to say how do I get GDI+ to ignore these values, and simply do what I asked of it - scale a bitmap to fit a rectangle :mad::confused: thanks Jason

[Christian Graus]

I don't htink GDI+ does anything with DPI. You can set DPI in code tho, if you need to try that.

Christian Graus Please read this if you don't understand the answer I've given you "also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )