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8-bit Alphablit


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#1 Dragun   Members   -  Reputation: 123

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Posted 08 January 2000 - 09:14 AM

Is this possible?

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#2 SiCrane   Moderators   -  Reputation: 9668

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Posted 08 January 2000 - 02:56 PM

I don''t know of any API that would support that happily. It''s possible to create 8-bit images with alpha channels though....

#3 Melo   Members   -  Reputation: 122

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Posted 08 January 2000 - 11:44 PM

There is a 8bit Alpha routine described in the DirextX FAQ at http://www.microsoft.com/directx

Hope it helps

#4 SiCrane   Moderators   -  Reputation: 9668

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Posted 09 January 2000 - 12:52 AM

As I said, I don''t know of any API that would support that happily.

Seriously, if you want to use the algorithm they describe in the FAQ you have to choose your palette even more carefully than normal. If you can deal with re-generating your palette every so often, you might consider leaving 20 or so color indices free to assign to blended colors.

#5 Starfall   Members   -  Reputation: 122

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Posted 09 January 2000 - 01:05 PM

There''s a tutorial at flipcode on this.

http://www.flipcode.com/tutorials/tut_transmaps.shtml

Regards

Starfall




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