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#REDIRECT[[Shaders and filters]]
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{{stub}}
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WIP. Barely half done. Finished version will list every known shader, plus description and sample image.
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==Types==
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===Anti-aliasing===
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A graphics rendering technique used to reduce or eliminate jagged or stepped edges (aliasing artefacts). It works by applying various methods such as super-sampling, multi-sampling, or post-processing filters to improve the smoothness and visual quality of the image, particularly when displaying diagonal lines, curves, or fine details.
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{| class="wikitable"
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! scope="col" style="text-align: center;"|Name
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! scope="col" style="text-align: center;"|Image
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! scope="col" style="text-align: center;"|
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Description
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/anti-aliasing/advanced-aa.cg advanced-aa.cg]
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| style="text-align: center;"|[[File:Advanced-aa.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/anti-aliasing/fx-aa.cg fx-aa.cg]
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| style="text-align: center;"|[[File:Fx-aa.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/anti-aliasing/fxaa-edge-detect.cg fxaa-edge-detect.cg]
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| style="text-align: center;"|[[File:Fxaa-edge-detect.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/anti-aliasing/reverse-aa.cg reverse-aa.cg]
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| style="text-align: center;"|[[File:Reverse-aa.png|thumb]]
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| style="text-align: center;"|
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|}
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===Auto-box===
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Shaders that scale the image within the viewport. This can be useful for ensuring a certain quality of scaling, often with the intention of applying other effects on top that are picky about scaling.
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{| class="wikitable"
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! scope="col" style="text-align: center;"|Name
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! scope="col" style="text-align: center;"|Image
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! scope="col" style="text-align: center;"|
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Description
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/auto-box/box-max.cg box-max.cg]
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| style="text-align: center;"|[[File:Box-max.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/auto-box/sharpen-lighter-box.cg sharpen-lighter-box.cg]
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| style="text-align: center;"|[[File:Sharpen-lighter-box.png|thumb]]
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| style="text-align: center;"|
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|}
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===Bicubic===
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Enlarges images by calculating the colour values of new pixels based on a weighted average of neighbouring pixels in the original image. Popular for its ability to produce smooth, high-quality results when resizing images, especially when significant upscaling is required.
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{| class="wikitable"
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! scope="col" style="text-align: center;"|Name
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! scope="col" style="text-align: center;"|Image
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! scope="col" style="text-align: center;"|
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Description
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/bicubic/bicubic-fast.cg bicubic-fast.cg]
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| style="text-align: center;"|
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/bicubic/bicubic-normal.cg bicubic-normal.cg]
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| style="text-align: center;"|
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/bicubic/bicubic-sharp.cg bicubic-sharp.cg]
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| style="text-align: center;"|
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/bicubic/bicubic-sharper.cg bicubic-sharper.cg]
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| style="text-align: center;"|
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| style="text-align: center;"|
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|}
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===CRT===
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A digital effect used to emulate the appearance of old cathode ray tube monitors and televisions. It does this by adding effects such as scan lines, colour distortion and curvature to the image to recreate the look. It is particularly popular because the majority of developers have used the unique properties of a CRT to their advantage to create certain effects.
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{| class="wikitable"
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! scope="col" style="text-align: center;"|Name
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! scope="col" style="text-align: center;"|Image
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! scope="col" style="text-align: center;"|
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Description
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/crt/4xbr-hybrid-crt.cg 4xbr-hybrid-crt.cg]
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| style="text-align: center;"|[[File:4xbr-hybrid-crt.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/crt/4xbr-hybrid-crt-b.cg 4xbr-hybrid-crt-b.cg]
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| style="text-align: center;"|[[File:4xbr-hybrid-crt-b.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/crt/crt.cg crt.cg]
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| style="text-align: center;"|[[File:Crt.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/crt/crt-caligari.cg crt-caligari.cg]
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| style="text-align: center;"|[[File:Crt-caligari.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/crt/crt-cgwg.cg crt-cgwg.cg]
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| style="text-align: center;"|[[File:Crt-cgwg.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/crt/crt-curved.cg crt-curved.cg]
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| style="text-align: center;"|[[File:Crt-curved.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/crt/crt-geom-flat.cg crt-geom-flat.cg]
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| style="text-align: center;"|[[File:Crt-geom-flat.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/crt/crt-highgamma.cg crt-highgamma.cg]
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| style="text-align: center;"|[[File:Crt-highgamma.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/crt/crt-normalgamma.cg crt-normalgamma.cg]
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| style="text-align: center;"|[[File:Crt-normalgamma.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/crt/crt-reverse-aa.cg crt-reverse-aa.cg]
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| style="text-align: center;"|[[File:Crt-reverse-aa.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/crt/phosphor.cg phosphor.cg]
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| style="text-align: center;"|[[File:Phosphor.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|
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[https://github.com/libretro/common-shaders/blob/master/crt/phosphor-normalgamma.cg phosphor-<br />normalgamma.cg]
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| style="text-align: center;"|[[File:Phosphor-normalgamma.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|
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[https://github.com/libretro/common-shaders/blob/master/crt/snes-hires-blend.cg snes-hires-blend.cg]
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| style="text-align: center;"|[[File:Snes-hires-blend.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|
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[https://github.com/libretro/common-shaders/blob/master/crt/tv-highcontrast-hd-1152x672.cg tv-highcontrast-<br />hd-1152x672.cg]
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| style="text-align: center;"|[[File:Tv-highcontrast-hd-1152x672.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/crt/tv-highcontrast-hd.cg tv-highcontrast-hd.cg]
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| style="text-align: center;"|[[File:Tv-highcontrast-hd.png|thumb]]
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| style="text-align: center;"|
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|}
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===DDT===
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Data-Dependent Triangulation Shaders look at the square plane formed by the four nearest neighbours (a basic image resizing technique that assigns each pixel in the resized image the colour value of the nearest pixel in the original image). They divide the square plane into two triangular planes. The pixels are bilinearly interpolated using only the three points of the triangles to which they belong.
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{| class="wikitable"
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! scope="col" style="text-align: center;"|Name
 +
! scope="col" style="text-align: center;"|Image
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! scope="col" style="text-align: center;"|
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Description
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/ddt/ddt.cg ddt.cg]
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| style="text-align: center;"|[[File:Ddt.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/ddt/ddt-extended.cg ddt-extended.cg]
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| style="text-align: center;"|[[File:Ddt-extended.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/ddt/ddt-waterpaint.cg ddt-waterpaint.cg]
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| style="text-align: center;"|[[File:Ddt-waterpaint.png|thumb]]
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| style="text-align: center;"|
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|}
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===Dithering===
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A technique used to increase the amount of colour and shading that can be produced on a system. The effect is achieved by using lines or dots which are then blurred by the low quality NTSC signals (composite or RF) used by the system.
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{| class="wikitable"
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! scope="col" style="text-align: center;"|Name
 +
! scope="col" style="text-align: center;"|Image
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! scope="col" style="text-align: center;"|
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Description
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|
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/tree/master/dithering mdapt]
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| style="text-align: center;"|
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| style="text-align: center;"|
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|}
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===Eagle===
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{| class="wikitable"
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! scope="col" style="text-align: center;"|Name
 +
! scope="col" style="text-align: center;"|Image
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! scope="col" style="text-align: center;"|
 +
Description
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/eagle/super-eagle.cg super-eagle.cg]
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| style="text-align: center;"|[[File:Super-eagle.png|thumb]]
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| style="text-align: center;"|
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|}
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===Handheld===
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Simulates an LCD screen of a handheld device that has specific artifacts in comparison to newer screens.
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{| class="wikitable"
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! scope="col" style="text-align: center;"|Name
 +
! scope="col" style="text-align: center;"|Image
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! scope="col" style="text-align: center;"|
 +
Description
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/tree/master/handheld/gameboy Gameboy]
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| style="text-align: center;"|[[File:Gameboy.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/tree/master/handheld/lcd-shader lcd]
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| style="text-align: center;"|[[File:Lcd.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/handheld/dot.cg dot.cg]
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| style="text-align: center;"|[[File:Dot.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/handheld/lcd3x.cg lcd3x.cg]
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| style="text-align: center;"|[[File:Lcd3x.png|thumb]]
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| style="text-align: center;"|
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|}
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===Hqx===
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("hq" stands for "high quality" and "x" for magnification) is a pixel art scaling algorithm developed by Maxim Stepin and used in emulators such as Nestopia, bsnes, ZSNES, Snes9x, FCE Ultra and many more. There are 3 hqx filters: hq2x, hq3x and hq4x, which scale by a factor of 2, 3 and 4 respectively.
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{| class="wikitable"
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! scope="col" style="text-align: center;"|Name
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! scope="col" style="text-align: center;"|Image
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! scope="col" style="text-align: center;"|
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Description
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/hqx/hq2x.cg hq2x.cg]
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| style="text-align: center;"|[[File:Hq2x.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/hqx/hq4x.cg hq4x.cg]
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| style="text-align: center;"|[[File:Hq4x.png|thumb]]
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| style="text-align: center;"|
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|}
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===Lanczos===
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{| class="wikitable"
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! scope="col" style="text-align: center;"|Name
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! scope="col" style="text-align: center;"|Image
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! scope="col" style="text-align: center;"|
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Description
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/lanczos/lanczos4.cg lanczos4.cg]
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| style="text-align: center;"|[[File:Lanczos4.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/lanczos/lanczos6.cg lanczos6.cg]
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| style="text-align: center;"|[[File:Lanczos6.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/lanczos/lanczos12.cg lanczos12.cg]
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| style="text-align: center;"|[[File:Lanczos12.png|thumb]]
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| style="text-align: center;"|
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|-
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| style="text-align: center;"|[https://github.com/libretro/common-shaders/blob/master/lanczos/lanczos16.cg lanczos16.cg]
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| style="text-align: center;"|[[File:Lanczos16.png|thumb]]
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| style="text-align: center;"|
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|}
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==Unfiltered Image==
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Picture as it appears directly from a digital connection.
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{| class="wikitable"
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! scope="col" style="text-align: center;"|Name
 +
! scope="col" style="text-align: center;"|Image
 +
! scope="col" style="text-align: center;"|Description
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|-
 +
|Pixellate
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|[[File:Pixellate.png|thumb|left]]
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|
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|}
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----
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{{NEL}}
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[[Category:FAQs]]
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[[Category:Shaders/Filters]]

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