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directdraw alpha blending (UPDATED) HELP ME!!!!!
[b][red]This message was edited by Wannabean333 at 2004-6-22 17:6:53[/red][/b][hr]
[b][red]This message was edited by Wannabean333 at 2004-6-22 16:5:53[/red][/b][hr]
Right now, I'm improving my old game engine by adding alpha blending capabilities. Since I have no experience with the subject, I turned to open source and freeware to help. I could only find one that I could figure out, because I am using directx and I want it to be fast.
I am using the "improved" version (non-MMX) from this site:http://www.gamedev.net/reference/articles/article817.asp
I compiled the sample file from that article, and when testing the blending speed, the FPS hovered at around 170. When I copied the function into my game library, it still works, but the FPS drops down from about 160 to about 40. When I try the "fast 50/50" function, it drops even further to about 20.
Why would this happen? It works just fine in the sample (which I can compile).
If you know of or have any other alpha blending code that uses directdraw, please tell me!
Please help me out here!!!
Thanks for ANY help!
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