Re: Replace pixel color

Draw the icons using an ImageAttributes object and a ColorMatrix that will
modify the colours.

If images are shades of gray then you can selectively filter any of the G,G
or B components to change the hue.

--
Bob Powell [MVP]
Visual C#, System.Drawing

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"Mark Heath" <MarkHeath@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:B6608657-3DB1-4225-A257-C2041CB4261E@xxxxxxxxxxxxxxxx
>I have some PNG files containing icons that are entirely one color - a
> forground color of gray and a transparent background. I have loaded these
> into Bitmap objects that I am painting using the DrawImage command. I
> would
> like to sometimes paint the same icon, but with a different foreground
> color.
> Is there a quick and easy way of doing this using GDI in .NET?
>
> I tried using GetPixel and SetPixel but this returns an error: "SetPixel
> is
> not supported for images with indexed pixel formats"
> Also, the image Palette property contains no entres so I couldn't change
> that.
>
> If all else fails I can just make some more PNG files, but I am hoping
> there
> is a more elegant solution.
>
> thanks
> Mark


.

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