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Dark GDK / Screen shot of the rendering device

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JDforce
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Posted: 23rd Oct 2007 01:47 Edited at: 23rd Oct 2007 02:12
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I need to get a screen shot of the game window at a certain time. Not the desktop, but my game window only. While looking what to do I found the dbGetBackbuffer() which returns a pointer, but I confess to ignore how to extract an image bitmap by using that pointer value. Actually if there is another way it does not matter as long as it captures the window render in a very fast manner.
Please if anybody knows how to do it, I will be very glad.

What will be best is to obtain a bitmap in memory, instead of a saved one.

May the 3d force B with U
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jason p sage
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Posted: 23rd Oct 2007 02:46
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Save bitmap won't do it?


http://www.jasonpetersage.com/?PAGE=ironinfantry&SECTION=ironinfantry
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JDforce
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Posted: 23rd Oct 2007 06:17
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Yes, saving a Bitmap of the current render will partially solve the problem, but since anyway I have to use the bitmap in the program, it would be faster to stream it to memory.

How do you save to a bitmap? I must have skipped that..

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jason p sage
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Posted: 23rd Oct 2007 16:08
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Ok - maybe I was thinking this: Get Image I think you can image pretty easy.

The other means to this end would be the Win API (DLL you can call I'm sure) that does what hitting the "Print Screen" key does - kinda - it drops the current "Display" into the ClipBoard. The API calls should allow you to get a Display VDC - (Video Display Context - pointer I think) and maybe this route has a way you could copy it to a memblock.

This is where C++ pointers are cool. You could simply Get the pointer - allocate mem for it - and call a memcpy command which goes pretty fast to your "Save spot" though this is potentially a lot of data - depending on screen res etc.


http://www.jasonpetersage.com/?PAGE=ironinfantry&SECTION=ironinfantry
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