The imageSize parameter was getting mis-detected as a built-in uniform (that is, the dimensions of an image/framebuffer named 'image'), and this was causing d3d drivers to fail to compile altogether and glcore was giving back a 0/undefined value.
Closes#542.
* Move initial batch of shaders and presets to smoothing subdirectory
* Rename smoothing to edge enhancement
* Move cubic and windowed into interpolation
* Fix some presets
* Fix rest of presets
* Rename edge-enhancement to edge-smoothing
* Move pixel art scalers into separate directory separate from 'interpolation'
* Flatten interpolation/cubic into interpolation/
* 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
* Add files via upload
* add night_mode
* Update lanczos16.slang
fix minor artifacts
* Brightness fix scanline.slang
Permanent Brightness fix. No need to adjust "SCANLINE_BASE_BRIGHTNESS.
* fix scanlines misalignment
* 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
