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Joined: 3/23/2006(UTC)
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I load to images within the viewer: 1 jpg 1 gif - transparent I need to be able to work with the gif image: Change RGB Change Brightness & Contrast This does not seem possible or am I missing the plot? Thanks for your help. Regards, Barry
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Rank: Advanced Member
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Joined: 8/2/2003(UTC)
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GIF files are always stores in 8-bit indexed pixel format. That's why you cannot apply these effects until you convert it to 24-bit RGB format. So to resolve this problem, you should call: objBitmap.Data.ConvertTo24bppRgb before you try to apply any channel-based transforms.
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Rank: Member
Groups: Member
Joined: 3/23/2006(UTC)
Posts: 17
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Doing that does not work. The image is not transparent any more. The image below it then becomes hidden and I o not want this to be so. Anything else I can do?
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Rank: Advanced Member
Groups: Member, Administration
Joined: 8/2/2003(UTC)
Posts: 876
Thanks: 2 times
Was thanked: 27 time(s) in 27 post(s)
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Sorry, I did not notice that you need to maintain transparency. If you need to keep the transparency, you should convert to 32-bit ARGB (i.e. pixel format with alpha channel). So you should use the ConvertTo32bppArgb method instead of ConvertTo24bppRgb.
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Rank: Member
Groups: Member
Joined: 3/23/2006(UTC)
Posts: 17
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GREAT!!!! It works!!! Thanks a stack.
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Rank: Advanced Member
Groups: Member, Administration
Joined: 8/2/2003(UTC)
Posts: 876
Thanks: 2 times
Was thanked: 27 time(s) in 27 post(s)
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Please let me know if you have any other questions.
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