Ready-to-use GPU-based visual effects or filters. Most include orx-parameters annotations so they can be easily controlled via orx-gui.
The provided filters are based on OPENRNDR's
Filter class
All filters provided by orx-fx assume pre-multiplied alpha inputs, which is OPENRNDR's default.
Here's a (potentially incomplete) list of the effects provided by orx-fx. Explore the source for an up-to-date list.
FXAA, fast approximate anti-aliasing.
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.
ColorBurnColorDodgeDarkenHardLightLightenMultiplyNormalOverlayScreenAdd, add source and destination inputsSubtract, substract destination color from source color
SourceIn, Porter-Duff source-in blend, intersect source and destination opacity and keep source colorsSourceOut, Porter-Duff source-out blend, subtract destination from source opacity and keep source colorsSourceAtop, Porter-Duff source-atop blend, uses destination opacity, layers source on top and keeps both colorsDestinationIn, Porter-Duff destination-in blend, intersect source and destination opacity and keep source colorsDestinationOut, Porter-Duff destination-out blend, subtract destination from source opacity and keep destination colorsDestinationAtop, Porter-Duff destination-atop blend, uses source opacity, layers destination on top and keeps both colorsXor, Porter-Duff xor blend, picks colors from input with highest opacity or none with opacities are equal
Passthrough, pass source color and opacity.
Most blur effects are opacity preserving
ApproximateGaussianBlur, a somewhat faster but less precise implementation ofGaussianBlurBloom, a multi-pass bloom/glow effectBoxBlur, a simple but fast box blurFrameBlurGaussianBlur, a slow but precise Gaussian blurHashBlur, a noisy blur effectLaserBlurLineBlurMipBloomZoomBlur, a directional blur with a zooming effect
ChromaticAberration, a chromatic aberration effect based on RGB color separationColorCorrection, corrections for brightness, contrast, saturation and hueColorLookup, Color LUT filterColorMix, filter implementation of OPENRNDR's color matrix mixingDuotone, maps luminosity to two colors, very similar toLumaMapbut uses LAB color interpolation.DuotoneGradient, a two-point gradient version ofDuotoneInvertLumaMap, maps luminosity to two colorsLumaOpacity, maps luminosity to opacity but retains source colorLumaThreshold, applies a treshold on the input luminosity and maps to two colorsPosterize, a posterize effectSepia, applies a reddish-brown monochrome tint that imitates an old photographSetBackgroundSubtractConstant, subtract a constant color from the source color
OkLabToRgbRgbToOkLab
All distortion effects are opacity preserving
BlockRepeat- repeats a single configurable block of the source inputDisplaceBlendFisheyeFluidDistortLensesHorizontalWave- applies a horizontal wave effect on the source inputVerticalWave- applies a vertical wave effect on the source inputPerspectivePlane- applies a planar perspective distortion on the source inputPerturbPolarToRectangularRectangularToPolarStackRepeat- repeats the source input in a stack fashionStretchWavesTapeNoiseTilesVideoGlitch
ADither- a selection of dithering effectsCMYKHalftone- a configurable CMYK halftoning effectCrosshatch- crosshatching effectLumaHalftone- a halftoning effect based on luminosity
LumaSobel- A Sobel-kernel based luminosity edge detectorEdgesWork- An edges filter doubling as erosionContour- detects multi-level contours- New:
CannyEdgeDetector
FilmGrain- adds film-like grain to the source input
DropShadow- adds a drop shadow based on the opacity in the input image
Uncharted2Tonemap- implements the Uncharted2 tonemapper
FlipVertically- flips the source input vertically.
The Post extension provides an easy way to apply filters to your drawings. Allocating
and resizing color buffers is all taken care of by Post.
To get additional intermediate color buffers one can access intermediate[x]
fun main() = application {
configure {
windowResizable = true
}
program {
extend(Post()) {
val blur = ApproximateGaussianBlur()
val add = Add()
post { input, output ->
blur.window = 50
blur.sigma = 50.0
blur.apply(input, intermediate[0])
add.apply(arrayOf(input, intermediate[0]), output)
}
}
extend {
drawer.circle(width / 2.0, height / 2.0, 100.0)
}
}
}Colormap filters operate only on the RED color channel. For example depth maps from orx-depth-camera.
They allow selection of min / max value range and applying exponential
shaping curve within this range:
GrayscaleColormap- maps to gray tonesSpectralZucconiColormap- maps to natural light dispersion spectrum as described by Alan Zucconi in the Improving the Rainbow article.TurboColormap- maps to Turbo Colormap according to Turbo, An Improved Rainbow Colormap for Visualization by Google.
