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POWhole screen capture and render in DirectX [PERFORMANCE]
 

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  1. POWhole screen capture and render in DirectX [PERFORMANCE]
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    <p>I need some way to get screen data and pass them to DX9 surface/texture in my aplication and render it at at least <strong>25fps</strong> at <strong>1600*900</strong> resolution, 30 would be better.</p> <p>I tried BitBliting but even after that I am at 20fps and after loading data into texture and rendering it I am at 11fps which is far behind what I need.</p> <p>GetFrontBufferData is out of question.</p> <p><strong><a href="http://www.codeproject.com/Articles/5051/Various-methods-for-capturing-the-screen#Windows%20Media%20API%20for%20Capturing%20the%20Screen%20%3a">Here</a></strong> is something about <strong>using Windows Media API</strong>, but I am not familiar with it. Sample is saving data right into file, maybe it can be set up to give you individual frames, but I haven't found good enough documentation to try it on my own.</p> <p>My code:</p> <pre><code>m_memDC.BitBlt(0, 0, m_Rect.Width(),m_Rect.Height(), //m_Rect is area to be captured &amp;m_dc, m_Rect.left, m_Rect.top, SRCCOPY); //at 20-25fps after this if I comment out the rest //DC,HBITMAP setup and memory alloc is done once at the begining GetDIBits( m_hDc, (HBITMAP)m_hBmp.GetSafeHandle(), 0L, // Start scan line (DWORD)m_Rect.Height(), // # of scan lines m_lpData, // LPBYTE (LPBITMAPINFO)m_bi, // address of bitmapinfo (DWORD)DIB_RGB_COLORS); // Use RGB for color table //at 17-20fps IDirect3DSurface9 *tmp; m_pImageBuffer[0]-&gt;GetSurfaceLevel(0,&amp;tmp); //m_pImageBuffer is Texture of same //size as bitmap to prevent stretching hr= D3DXLoadSurfaceFromMemory(tmp,NULL,NULL, (LPVOID)m_lpData, D3DFMT_X8R8G8B8, m_Rect.Width()*4, NULL, &amp;r, //SetRect(&amp;r,0,0,m_Rect.Width(),m_Rect.Height(); D3DX_DEFAULT,0); //12-14fps IDirect3DSurface9 *frameS; hr=m_pFrameTexture-&gt;GetSurfaceLevel(0,&amp;frameS); // Texture of that is rendered pd3dDevice-&gt;StretchRect(tmp,NULL,frameS,NULL,D3DTEXF_NONE); //11fps </code></pre> <p>I found out that for 512*512 square its running on 30fps (for i.e. 490*450 at 20-25) so I tried dividing screen, but it didn't seem to work well.</p> <p>If there is something missing in code please write, don't vote down. Thanks</p>
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    1. COOut of curiosity, what's the issue with GetFrontBufferData? I've had moderate success with it in the past (though doing slightly different things).
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      1. USDaniel Sloof
    2. CODaniel Sloof: 3 FPS at the best, is't also in documentation that it's slow function.
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      1. USLeonidasCZ
 

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