* Add gizmo-crt shader
This shader tries to reproduce a CRT-like output without replicating mask or RGB patterns.
It has the following features:
- allows fractional scaling
- uses texture AA shader and subpixel scaling for evenly placed sharp pixels
- has a horizontal blur function which mimics bad signal quality of some systems (megadrive, psx)
- has a vertical blur function which mimics n64 vertical software blur
- adds some noise to mimic restless CRT colors
- has a curvator function
- looks good with resolutions <= 1080p
- has modest system requirements
https://forums.libretro.com/t/gizmo-crt-shader/41409https://github.com/gizmo98/gizmo-crt-shader
* Update crt-consumer.slang
Removed NTSC as it conflicts with saturation/hue, and can be used as a separate pass anyway. Fixed some mistakes. Massive speed-up from 120 fps to 450 fps on Intel HD630.
* Update crt-gdv-mini-ultra.slang
Removed NTSC, some corrections too.
* Update zfast_crt_composite.slang
* Update fake-crt-geom.slang
* integrate NTSC-colors
* Integrate NTSC-colors
* Integrate NTSC-colors, some fixes too
* additions
Added hue shift from grade, improved glow, added scanlines downscale to interlace mode. Some other touches too
* Update crt-consumer.slang
* fix scanlines misalignment
* add protect white on masks parameter
* improve glow
* add palette fixes
Sega, and PUAE Atari ST dark palettes
* integrate NTSC-colors
* Integrate NTSC-colors
* Integrate NTSC-colors, some fixes too
* additions
Added hue shift from grade, improved glow, added scanlines downscale to interlace mode. Some other touches too
* Update crt-consumer.slang
* fix scanlines misalignment
* add protect white on masks parameter
* integrate NTSC-colors
* Integrate NTSC-colors
* Integrate NTSC-colors, some fixes too
* additions
Added hue shift from grade, improved glow, added scanlines downscale to interlace mode. Some other touches too
* Update crt-consumer.slang
* make a bunch of implicit scaling rules explicit and move color shaders before scaling shaders in the handheld directory
* remove extraneous file
* switch vhs from viewport to source scaling
* fix preset parsing issues from https://github.com/libretro/slang-shaders/issues/369
* one more preset fixed
* fix some malformed preset directives
* fix preset lines erroneously ending in semicolons
* fix another malformed preset directive
* make sure grade and glass at least load properly
* comment one more bad path
* update shaders that use Original to use a reference pass instead for append/prepend readiness
* remove some extraneous files
* fix super-xbr preset that was already broken apparently
