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#Actualeppo

Posted 23 April 2013 - 12:34 PM

Are you trying to capture the entire desktop, or only a single desktop window?

 

GetDisplaySurfaceData() only works in full screen mode. In windowed mode DXGI can blit to a shared surface managed by the desktop windows manager, but has no access to the entire screen buffer. DXGI 1.2 under Windows 8 adds access to the desktop via a Duplication API.

 

To create a screen dump: Link

To read the contents of a DXGI surface into sys mem, CopyResource() the backbuffer to a surface created with CPU_READ access. Then Map() the surface to read back the texture data.


#1eppo

Posted 23 April 2013 - 12:21 PM

Are you trying to capture the entire desktop, or only a single desktop window?

 

GetDisplaySurfaceData() only works in full screen mode. In windowed mode DXGI can blit to a shared surface managed by the desktop windows manager, but has no access to the entire screen buffer.

 

To create a screen dump: Link

To read the contents of a DXGI surface into sys mem, CopyResource() the backbuffer to a surface created with CPU_READ access. Then Map() the surface to read back the texture data.


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