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Started by quadrafuzz Aug 17, 2001 at 3:36 PM 8 replies 350+ views

Original Post

Aug 17, 2001 at 3:36 PM

I''m sorta new to directx programming but have successfully programmed pong and a few other lame games. However with my newest, I want to be able to display a bitmap on the desktop, with no colored background behind the bitmap. Essentially, I want the bitmap to be able to move around on the desktop. Can this be done, and if so, how using directx programming? Any help is appreciated. quad

fredjordans

Aug 17, 2001 at 3:40 PM

What you''d probably want to do is create a Windowed application the size of your bitmap, and then fill the entire window with the bitmap you want to display. Sorry, no code, I''m also a newbie

Fred

Torn Space

Aug 17, 2001 at 4:04 PM

What you want is an Overlay. Check the SDK example, I think it''s also called Overlay.

-M

Mman

Aug 17, 2001 at 4:14 PM

I think what he means is transparency, If you are using DX 7 with Visual Basic then do this: Let "Tex1" represent your texture. Now type
Tex1.setdecaltransparency D_TRUE
Tex1.setdecaltransparencyColor 0 ''this sets every area of the picture with the color BLACK to be transparent.

Hope this helps.

quadrafuzz

Author

quadrafuzz

Aug 17, 2001 at 4:51 PM

Thanks guys, in response to that last post, I''m using Visual C++ 6.0, not basic. Do you have to code that will work to do that transparency with C++ 6?

fredjordans

Aug 17, 2001 at 5:37 PM

I don''t know exactly waht you mean by a texture... If you mean a surface, then I didn''t know that you can make a primary surface transparent. If you just mean a bitmap or some other image, then making certain color transparent will just let you see the primary surface.

quadrafuzz

Author

quadrafuzz

Aug 17, 2001 at 6:33 PM

yeah, that''s what I mean, I want the primary surface to be transparent so that the desktop shows while the game is running. Any ideas?

quad

Jasun220

Aug 18, 2001 at 2:05 AM

Just do it like most of the screen savers do it... take a screen shot of the desktop, and just render that under everything else.

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