Fix stretched FMVs for Resident Evil Revelations 2.

[noorus]

Add a fix for stretched FMVs for ReRev2.

Explanation:
FMV rendering uses a YUV decoding pixel shader with a crc of 0x9D190FC7 and a generic screenspace vertex shader with a crc of 0x1287841D. We hook D3DDevice9::DrawPrimitive, and if both of these shaders are active, we instead activate our own vertex shader (injected earlier) which resizes the verts according to 16:9 aspect.

[ThirteenAG]

I would also replace vtable hook with a direct exe hook instead, I'll do it when I'm able to test this later.

[noorus]

Yeah, that way is probably more compatible with other 3rd party programs.
I realize now that the injected shader is also not getting released at all, but device/shader recreation is so infrequent that I don't think it's a real issue

[ThirteenAG]

Pushed refactored code, but subtitles look weird now. Any idea on how to fix them?

[ThirteenAG]

Or maybe it's possible to clear the sides of the screen in the shader? That way subtitles would be at least on black, instead of artifacting.

[noorus]

Oh, I didn't try with subtitles.. I can try to take a look at some point later

[ThirteenAG]

Managed to fix the subtitles, apparently my scaling code was not properly applied to cutscene subtitles.

[ThirteenAG]

Also backported this to revelations 1, merging now, and thanks for the contribution.