This fixes the crashes occuring at startup with a non-empty shader cache.
Because LinearDiskCache reads/writes to the storage of ShaderUid, ShaderUid must be trivially copyable.
Additionally, adds a static assert to LinearDiskCache to ensure this doesn't happen in the future.
The initialization of ShaderUid data has been moved to the code generation functions, so the above condition holds true.
This was due to specifying negative source coordinates for the texture copy, which must lie within the bounds of the source and destination textures.
The behavior now is to clamp the copy region to [0 <= size <= backbuffer size], resulting in a copy region that can be smaller than the backbuffer, but never larger.
Since ResolveSubresource cannot be used with depth textures (and throws an error with the debug layer enabled), use a shader which selects the minimum depth value from all samples.
Changes the sampler by XFBEncoder to use a linear filter, rather than point, to match GL behavior.
Stenzek