how can I edit a gif file? CONFUSED AGAIN!

Well I can edit JPG files perfectly fine, but I tried a GIF file and I get this error:
A Graphics object cannot be created from an image that has an indexed pixel format.
I'm obviously trying to create a graphics object from the GIF image.

I've tried loading the GIF by using both of these methods:
dim img as image = image.fromfile(gifFile)
dim bmp as new bitmap(gifFile)

both will result the same. I'm wondering how I can "convert" the indexed format to a normal image so it can be edited with the Graphics class. There should certainly be a way, but I'm clueless

try this link from the Microsoft Knowledge Base...
HOW TO: Save a .gif File with a New Color Table By Using Visual Basic .NET
hope it helps :)

Quote:

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Originally posted by dynamic_sysop
try this link from the Microsoft Knowledge Base...
HOW TO: Save a .gif File with a New Color Table By Using Visual Basic .NET
hope it helps :)

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hmm I havent read that yet, but.... does this happen only with GIF files? can I just load and edit any other file types that .NET supports?

as far as i'm aware it's only Gif's that cause a problem , they have an indexing system and also it's something about the amount of colours, this is why you must specify " PixelFormat.Format8BPPIndexed " when making the new bitmap of the gif. eg:

VB Code:

Dim bitmap As Bitmap = New Bitmap(Width, Height, PixelFormat.Format8BppIndexed)

aah I cant get this to work. That article seems to be about SAVING a GIF file correctly. What I want it to be able to load the GIF and edit it with Graphics....
I tried doing this, but it wont work:

I locked the GIF as PixelFormat.Format8bppIndexed and created a bitmap and locked it with PixelFormat.Format24bppRgb. I tried copying every pixel of the GIF to the BMP file, but the result is a somewhat black and white image messed up... I dont know what I should do :confused:

bump

hehe this seems to work

VB Code:

public static Bitmap ConvertFromIndexedFormat(Image img)
        {
            Bitmap bmp = new Bitmap(img.Width, img.Height);
            Graphics gr = Graphics.FromImage(bmp);
            gr.DrawImage (img, 0,0);
            return bmp;
        }