sergiogn
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Showing forms/messages/text over game screens.
How can I show of form or message or text (or do something else like this) over/in a fullscreen DirectX or OpenGL game (for example 'Counter Strike/Half Life', 'Unreal Tournament', Warcraft)? If an application needs to show an information to a user even if he's playing games.
Thanks,
Sergio
Thanks,
Sergio
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Sergio, do you really think writing a DLL wrapper is a good choice? You have to replace the original DirectX/OpenGL DLL with your own one and pass all "information" you get to the original one (that you renamed before).
That means a lot of work and your wrapper doesn't work with newer versions of DX/OpenGL for shure!
Personally, I'd rather use API hooking. The chance that your code works with a newer version of the dll is better than using the wrapper technique!
Markus
That means a lot of work and your wrapper doesn't work with newer versions of DX/OpenGL for shure!
Personally, I'd rather use API hooking. The chance that your code works with a newer version of the dll is better than using the wrapper technique!
Markus
I found another, better solution for the problem:
What you need for drawing text, for example in a DX game, is a handle to the IDirect3DDevice of the game (for the D3DXCreateFont-function or whatever). It is not easy to obtain this, but it is possible, by hooking the API-Functions of the DirectX Libs.
The best way to get the handle is hooking the Present-Function, which is called every time a new frame is drawn. And that's the point where you have to draw your text.
OpenGL is a little bit easier, but the biggest problem there is drawing the text. There is a nearly similar function called when drawing a new frame, often named SwapBuffers.
API Hooking is very easy, if you have the right lib. I am using Madshis MadCodeHook-Lib, which is available at http://www.madshi.net/ . Some helpful examples are provided too.
ciao, df
What you need for drawing text, for example in a DX game, is a handle to the IDirect3DDevice of the game (for the D3DXCreateFont-function or whatever). It is not easy to obtain this, but it is possible, by hooking the API-Functions of the DirectX Libs.
The best way to get the handle is hooking the Present-Function, which is called every time a new frame is drawn. And that's the point where you have to draw your text.
OpenGL is a little bit easier, but the biggest problem there is drawing the text. There is a nearly similar function called when drawing a new frame, often named SwapBuffers.
API Hooking is very easy, if you have the right lib. I am using Madshis MadCodeHook-Lib, which is available at http://www.madshi.net/ . Some helpful examples are provided too.
ciao, df
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