Re: [PATCH 0/11] MR2662: mfplat: Optimize DXGI buffer locking

[Nikolay Sivov (＠nsivov)]

Nikolay Sivov (@nsivov) commented about dlls/mfplat/buffer.c:
> ID3D11Texture2D_GetDevice(buffer->dxgi_surface.texture, &device);
>      ID3D11Device_GetImmediateContext(device, &immediate_context);
> -    ID3D11DeviceContext_CopySubresourceRegion(immediate_context, (ID3D11Resource *)buffer->dxgi_surface.rb_texture,
> -            0, 0, 0, 0, (ID3D11Resource *)buffer->dxgi_surface.texture, buffer->dxgi_surface.sub_resource_idx, NULL);
> +
> +    if (flags == MF2DBuffer_LockFlags_Read || flags == MF2DBuffer_LockFlags_ReadWrite)

This could be a bitwise check for MF2DBuffer_LockFlags_Read. Not sure what's better.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/2662#note_31103