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Blending Bitmaps

Graphics and GPU Programming Programming

Started by codemonkey1984 August 11, 2002 07:50 PM

3 comments, last by codemonkey1984 21 years, 8 months ago

codemonkey1984

123

Author

August 11, 2002 07:50 PM

I''m trying to blend two bitmaps (on 16-bit ddraw7 surfaces) at runtime to create a stock fade effect between two screens. Can someone tell me how to achieve this, or direct me to a tutorial? Thanks!

Greg "tatsuo" Khezrnejattatsuo64@aol.comhttp://blind-daruma.jmc3.net/

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NeoLordAsm

122

August 12, 2002 07:50 AM

I think it can be done with alpha-blending.... I don''t know if additive-blending or other types can do the trick, but I would use alpha-blending... Gamedev.net has good tutorials about this, but if anyone has a better idea, plz post, because alpha-blending is slow(in most cases) and it is not the best thing to code.
Search Articles & Resources for Alpha Blending.

Bye!
-Roger-

August 12, 2002 12:20 PM

umm... it''s no deal to get alpha-blending running @70FPS on a 600MHz machine while doing fullscreen blends.

codemonkey1984

123

Author

August 12, 2002 02:28 PM

Alright. What values do I need to change in a general alpha blending algorithm to decrease/increase the level of translucency?

Greg "tatsuo" Khezrnejattatsuo64@aol.comhttp://blind-daruma.jmc3.net/

August 12, 2002 03:56 PM

go here http://www.longbowdigitalarts.com/seumas/progblend.html

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