1/3 WineD3D: CheckDeviceFormat rewrite

[Roderick Colenbrander]

Hi,

This are parts of the same CheckDeviceFormats rewrite which I proposed a couple of weeks ago. The difference is that it is done in 'smaller' parts now.

The current CheckDeviceFormat code is very broken in the sense that it doesn't check a lot of usage types, it doesn't take into account for all resource types whether a usage flag makes sense and it is hard to read/maintain.

This first patch adds a function CheckDepthStencilCapabilities whose purposes is to see if we support a certain d3d depthstencil format is backed by a WGL pixel format. This usage flag only makes sense on surfaces and 2d textures.

Regards,
Roderick Colenbrander
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