Gamma no reshade

[iOrange]

Implemented Brightness (gamma ramp) as a simple 3D LUT, so even raw D3d8 device can use it, no ReShade needed

[Polymega]

Thank you, iOrange!!

Elisha, our original (ReShade) implementation for restoring the game's brightness selector utilized this shader:
https://github.com/elishacloud/Silent-Hill-2-Enhancements/blob/master/Resources/LiftGammaGain.fx

I'm not sure if any of our other ReShade shaders require/use LiftGammaGain but, if not, that shader file could possibly be removed from our project going forward.

[iOrange]

Thanks @Polymega for testing, added small fix to support resolution scale, as well as optimized LUT generation (I'm an idiot at times) so it's smooth now and not lagging when you change brightness level in the menu.

[iOrange]

@elishacloud fixed all of the issues and optimized even further. Tested by @Polymega

[elishacloud]

I see a few issues with the latest check-ins here:

1. In the case of scaled resolutions there is an extra, unneeded CopyRects() and DrawPrimitiveUP().
2. There is a DrawPrimitiveUP() outside the BeginScene()/EndScene() pair, which is not allowed in Direct3D9.

[elishacloud]

Ok, I fixed both of the issues. I reduced the duplication and made sure that all draw calls are between the BeginScene()/EndScene() pair. Hopefully, I did not introduce a new issue.

[elishacloud]

Thanks @iOrange!

[iOrange]

Thanks for additional fixes @elishacloud !