91 lines
3.5 KiB
Markdown
91 lines
3.5 KiB
Markdown
# orx-fx
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orx-fx contains ready-to-use effects, or filters, for OPENRNDR. The provided filters are based on OPENRNDR's [`Filter` class](https://api.openrndr.org/org.openrndr.draw/-filter/index.html) and most will have [orx-parameters](https://github.com/openrndr/orx/tree/master/orx-parameters) annotations such that they can easily be used in combination with tools such as [orx-gui](https://github.com/openrndr/orx/tree/master/orx-gui).
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All filters provided by orx-fx assume pre-multiplied alpha inputs, which is OPENRNDR's default.
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## Effects index
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Here's a (potentially incomplete) list of the effects provded by orx-fx.
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### Anti-alias
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* `FXAA`, fast approximate anti-aliasing.
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### Blends
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Blend filters take two inputs ("source" and "destination"), they are intended to be used in `orx-compositor`'s layer blend. All blend filters are opacity preserving.
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#### Photoshop-style blends
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- `ColorBurn`
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- `ColorDodge`
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- `Darken`
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- `HardLight`
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- `Lighten`
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- `Multiply`
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- `Normal`
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- `Overlay`
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- `Screen`
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- `Add`, add source and destination inputs
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- `Subtract`, substract destination color from source color
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#### Porter-Duff blends
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- `SourceIn`, Porter-Duff source-in blend, intersect source and destination opacity and keep source colors
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- `SourceOut`, Porter-Duff source-out blend, subtract destination from source opacity and keep source colors
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- `DestinationIn`, Porter-Duff destination-in blend, intersect source and destination opacity and keep source colors
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- `DestinationOut`, Porter-Duff destination-out blend, subtract destination from source opacity and keep destination colors
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- `Xor`, Porter-Duff xor blend, picks colors from input with highest opacity or none with opacities are equal
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#### Various blends
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- `Passthrough`, pass source color and opacity.
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### Blurs
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Most blur effects are opacity preserving
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- `ApproximateGaussianBlur`, a somewhat faster but less precise implementation of `GaussianBlur`
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- `Bloom`, a multi-pass bloom/glow effect
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- `BoxBlur`, a simple but fast box blur
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- `GaussianBlur`, a slow but precise Gaussian blur
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- `HashBlur`, a noisy blur effect
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### Color
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- `ChromaticAberration`, a chromatic aberration effect based on RGB color separation
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- `ColorCorrection`, corrections for brightness, contrast, saturation and hue
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- `ColorLookup`, Color LUT filter
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- `ColorMix`, filter implementation of OPENRNDR's color matrix mixing
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- `LumaMap`, maps luminosity to two colors
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- `LumaOpacity`, maps luminosity to opacity but retains source color
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- `LumaThreshold`, applies a treshold on the input luminosity and maps to two colors
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- `SubtractConstant`, subtract a constant color from the source color
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### Distortion
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All distortion effects are opacity preserving
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- `BlockRepeat` - repeats a single configurable block of the source input
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- `StackRepeat` - repeats the source input in a stack fashion
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- `HorizontalWave` - applies a horizontal wave effect on the source input
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- `VerticalWave` - applies a vertical wave effect on the source input
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### Dither
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- `ADither` - a selection of dithering effects
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- `CMYKHalftone - a configurable CMYK halftoning effect
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### Edges
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- `LumaSobel` - A Sobel-kernel based luminosity edge detector
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### Grain
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- `FilmGrain` - adds film-like grain to the source input
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### Shadow
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- `DropShadow` - adds a drop shadow based on the opacity in the input image
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### Tonemap
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- `Uncharted2Tonemap` - implements the Uncharted2 tonemapper
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### Transform
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- `FlipVertically` - flips the source input vertically.
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