GEGL operation reference

Image processing operations are shared objects (plug-ins) loaded when GEGL initializes. This page is generated from information registered by the plug-ins themselves.

Categories

A plug-in can belong in multiple categories. Below is indexes broken down into the various available categories.

misc

transparency

blur

meta

svgfilter

programming

math

porter-duff

edge

video

effects

render

transform

color

input

compositors

core

enhance

output

	add
	Math operation add (c = c + value)
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	Double 0.00 -inf - +inf	value	global value used if aux doesn't contain data
	bilateral-filter
	An edge preserving blur filter that can be used for noise reduction. It is a gaussian blur where the contribution of neighbourhood pixels are weighted by the color difference from the center pixel.
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Double 4.00 0.00-70.00	blur-radius	Radius of square pixel region, (width and height will be radius*2+1).
	Double 8.00 0.00-70.00	edge-preservation	Amount of edge preservation
	box-blur
	Performs an averaging of a square box of pixels.
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Double 4.00 0.00-200.00	radius	Radius of square pixel region, (width and height will be radius*2+1).
	brightness-contrast
	Changes the light level and contrast.
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Double 1.00 -5.00-5.00	contrast	Range scale factor
	Double 0.00 -3.00-3.00	brightness	Amount to increase brightness
	c2g
	Color to grayscale conversion that uses, spatial color differences to perform local grayscale contrast enhancement.
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Int 384 2-5000	radius	Neighbourhood taken into account
	Int 3 0-1000	samples	Number of samples to do
	Int 23 0-1000	iterations	Number of iterations (length of exposure)
	Boolean False	same-spray	Use the same spray for all pixels
	Double 1.80 0.00-8.00	rgamma	Gamma applied to radial distribution
	Double 1.00 -10.00-10.00	strength	Amount of correction 0=none 1.0=full
	Double 1.00 0.00-10.00	gamma	Post correction gamma.
	checkerboard
	Checkerboard renderer.
	Object	output	Ouput pad for generated image buffer.
	Int 16 1- +inf	x	Horizontal width of cells pixels.
	Int 16 1- +inf	y	Vertical width of cells in pixels.
	Int 0 -inf - +inf	x-offset	Horizontal offset (from origin) for start of grid.
	Int 0 -inf - +inf	y-offset	Vertical offset (from origin) for start of grid.
	Color rgb(0.0000, 0.0000, 0.0000)	color1	One of the cell colors (defaults to 'black')
	Color rgb(1.0000, 1.0000, 1.0000)	color2	The other cell color (defaults to 'white')
	clear
	Porter Duff operation clear (d = 0.0)
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	clone
	Clone a buffer
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	String ID	ref	The reference ID used as input (for use in XML).
	color
	Generates a buffer entirely filled with the specified color, crop it to get smaller dimensions.
	Object	output	Ouput pad for generated image buffer.
	Color rgb(0.0000, 0.0000, 0.0000)	value	The color to render (defaults to 'black')
	color-burn
	SVG blend operation color-burn (if cA * aB + cB * aA <= aA * aB: d = cA * (1 - aB) + cB * (1 - aA) otherwise: d = (cA == 0 ? 1 : (aA * (cA * aB + cB * aA - aA * aB) / cA) + cA * (1 - aB) + cB * (1 - aA)))
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	color-dodge
	SVG blend operation color-dodge (if cA * aB + cB * aA >= aA * aB: d = aA * aB + cA * (1 - aB) + cB * (1 - aA) otherwise: d = (cA == aA ? 1 : cB * aA / (aA == 0 ? 1 : 1 - cA / aA)) + cA * (1 - aB) + cB * (1 - aA))
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	color-temperature
	Allows changing the color temperature of an image.
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Double 6500.00 1000.00-12000.00	original-temp	Estimated temperature of the light source in K the image was taken with.
	Double 6500.00 1000.00-12000.00	intended-temp	Corrected estimation of the temperature of the light source in K.
	contrast-curve
	Adjusts the contrast of the image according to a curve.
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Int 0 0-65536	sampling-points	Number of curve sampling points. 0 for exact calculation.
	Curve	curve	The contrast curve.
	convert-format
	Convert the data to the specified format
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	String RGBA float.	format	Babl ouput format string
	crop
	Crop a buffer
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Double 0.00 -inf - +inf	x	X
	Double 0.00 -inf - +inf	y	Y
	Double 10.00 -inf - +inf	width	Width
	Double 10.00 -inf - +inf	height	Height
	darken
	SVG blend operation darken (d = MIN (cA * aB, cB * aA) + cA * (1 - aB) + cB * (1 - aA))
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	difference
	SVG blend operation difference (d = cA + cB - 2 * (MIN (cA * aB, cB * aA)))
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	difference-of-gaussians
	Does an edge detection based on the differnece of two gaussian blurs.
	Double 1.00 0.00-10.00	radius1	Radius
	Double 2.00 0.00-10.00	radius2	Radius
	display
	Displays the input buffer in an SDL window (restricted to one display op/process, due to SDL implementation issues, a gtk+ based replacement would be nice.
	Object	input	Input pad, for image buffer input.
	String window_titl	window-title	Title to be given output window
	String icon_title.	icon-title	Icon to be used for output window
	Pointer	screen	private
	Int 0 0-1000	w	private
	Int 0 0-1000	h	private
	Int 0 0-1000	width	private
	Int 0 0-1000	height	private
	divide
	Math operation divide (c = value==0.0?0.0:c/value)
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	Double 1.00 -inf - +inf	value	global value used if aux doesn't contain data
	dropshadow
	Creates a dropshadow effect on the input buffer.
	Double 0.50 -10.00-10.00	opacity	Opacity
	Double 20.00 -inf - +inf	x	Horizontal shadow offset.
	Double 20.00 -inf - +inf	y	Vertical shadow offset.
	Double 10.00 -inf - +inf	radius	Blur radius.
	dst
	Porter Duff operation dst (d = cB)
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	dst-atop
	Porter Duff operation dst-atop (d = cB * aA + cA * (1 - aB))
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	dst-in
	Porter Duff operation dst-in (d = cB * aA)
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	dst-out
	Porter Duff operation dst-out (d = cB * (1 - aA))
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	dst-over
	Porter Duff operation dst-over (d = cB + cA * (1 - aB))
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	exclusion
	SVG blend operation exclusion (d = (cA * aB + cB * aA - 2 * cA * cB) + cA * (1 - aB) + cB * (1 - aA))
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	ff-load
	FFmpeg video frame importer.
	Object	output	Ouput pad for generated image buffer.
	Path /home/pippi	path	Path of file to load.
	Int 0 0-1000000	frame	frame number
	fractal-explorer
	Fractal Explorer
	Object	output	Ouput pad for generated image buffer.
	Int 400 10-10000000	width	Width
	Int 400 10-10000000	height	Height
	Int 0 0-8	fractaltype	Fractal Type
	Double -2.00 -3.00-3.00	xmin	Left
	Double 2.00 -3.00-3.00	xmax	Right
	Double -2.00 -3.00-3.00	ymin	Top
	Double 2.00 -3.00-3.00	ymax	Bottom
	Int 50 1-1000	iter	Iterations
	Double -0.75 -2.50-2.50	cx	CX (only Julia)
	Double 0.20 -2.50-2.50	cy	CY (only Julia)
	Double 1.00 0.00-1.00	redstretch	Red stretching factor
	Double 1.00 0.00-1.00	greenstretch	Green stretching factor
	Double 1.00 0.00-1.00	bluestretch	Blue stretching factor
	Int 1 0-2	redmode	Red application mode (0:SIN; 1:COS; 2:NONE)
	Int 1 0-2	greenmode	Green application mode (0:SIN; 1:COS; 2:NONE)
	Int 0 0-2	bluemode	Blue application mode (0:SIN; 1:COS; 2:NONE)
	Boolean False	redinvert	Red inversion
	Boolean False	greeninvert	Green inversion
	Boolean False	blueinvert	Blue inversion
	Int 256 2-8192	ncolors	Number of colors
	Boolean False	useloglog	Use loglog smoothing
	gamma
	Math operation gamma (c = powf (c, value))
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	Double 1.00 -inf - +inf	value	global value used if aux doesn't contain data
	gaussian-blur
	Performs an averaging of neighbouring pixels with the normal distribution as weighting.
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Double 4.00 0.00-200.00	std-dev-x	Standard deviation for the horizontal axis. (multiply by ~2 to get radius)
	Double 4.00 0.00-200.00	std-dev-y	Standard deviation for the vertical axis. (multiply by ~2 to get radius.)
	String iir	filter	Optional parameter to override the automatic selection of blur filter.
	grey
	Turns the image greyscale
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	hard-light
	SVG blend operation hard-light (if 2 * cA < aA: d = 2 * cA * cB + cA * (1 - aB) + cB * (1 - aA) otherwise: d = aA * aB - 2 * (aB - cB) * (aA - cA) + cA * (1 - aB) + cB * (1 - aA))
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	introspect
	GEGL graph vizualizer.
	Object	output	Ouput pad for generated image buffer.
	Object	node	GeglNode to introspect
	Pointer	buf	Buffer
	invert
	Inverts the components (except alpha), the result is the corresponding "negative" image.
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	layer
	A layer in the traditional sense.
	String over	composite-op	Composite operation to use
	Double 1.00 0.00-1.00	opacity	Opacity
	Double 0.00 -inf - +inf	x	Horizontal position
	Double 0.00 -inf - +inf	y	Vertical position
	Double 1.00 -inf - +inf	scale	Scale 1:1 size
	Path	src	Source datafile (png, jpg, raw, svg, bmp, tif, ...)
	levels
	Remaps the intensity range of the image
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Double 0.00 -1.00-4.00	in-low	Input luminance level to become lowest output
	Double 1.00 -1.00-4.00	in-high	Input luminance level to become white.
	Double 0.00 -1.00-4.00	out-low	Lowest luminance level in output
	Double 1.00 -1.00-4.00	out-high	Highest luminance level in output
	lighten
	SVG blend operation lighten (d = MAX (cA * aB, cB * aA) + cA * (1 - aB) + cB * (1 - aA))
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	load
	Multipurpose file loader, that uses other native handlers, and fallback conversion using image magick's convert.
	Path	path	Path of file to load.
	load-buffer
	A source that uses an in-memory GeglBuffer, for use internally by GEGL.
	Object	output	Ouput pad for generated image buffer.
	Object	buffer	The GeglBuffer to load into the pipeline
	mblur
	Accumulating motion blur
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Double 0.95 0.00-1.00	dampness	The value represents the contribution of the past to the new frame.
	mono-mixer
	Monochrome channel mixer
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Double 0.50 -10.00-10.00	red	Amount of red
	Double 0.25 -10.00-10.00	green	Amount of green
	Double 0.25 -10.00-10.00	blue	Amount of blue
	multiply
	Math operation multiply (c = c * value)
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	Double 1.00 -inf - +inf	value	global value used if aux doesn't contain data
	nop
	No operation (can be used as a routing point)
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	normal
	Porter Duff operation normal (d = cA + cB * (1 - aA))
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	opacity
	Weights the opacity of the input with either the value of the aux input or the global value property.
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	Double 0.50 -10.00-10.00	value	Global opacity value, used if no auxiliary input buffer is provided.
	open-buffer
	A source that uses an on-disk GeglBuffer.
	Object	output	Ouput pad for generated image buffer.
	String	path	a GeglBuffer on disk to open
	over
	Porter Duff operation over (d = cA + cB * (1 - aA))
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	overlay
	SVG blend operation overlay (if 2 * cB > aB: d = 2 * cA * cB + cA * (1 - aB) + cB * (1 - aA) otherwise: d = aA * aB - 2 * (aB - cB) * (aA - cA) + cA * (1 - aB) + cB * (1 - aA))
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	perlin-noise
	Perlin noise generator.
	Object	output	Ouput pad for generated image buffer.
	Double 1.20 -inf - +inf	alpha	not documented
	Double 1.80 -inf - +inf	scale	not documented
	Double -1.00 -inf - +inf	zoff	not documented
	Double 0.00 -inf - +inf	seed	not documented
	Int 3 0-20	n	not documented
	pixbuf
	Uses the GdkPixbuf located at the memory location in pixbuf.
	Object	output	Ouput pad for generated image buffer.
	Pointer	pixbuf	GdkPixbuf to use
	plus
	SVG blend operation plus (d = cA + cB)
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	png-save
	PNG image saver (passes the buffer through, saves as a side-effect.)
	Object	input	Input pad, for image buffer input.
	String	path	Target path and filename, use '-' for stdout.
	Int 1 1-9	compression	PNG compression level from 1 to 9
	rectangle
	A rectangular source of a fixed size with a solid color
	Double 0.00 -inf - +inf	x	Horizontal position
	Double 0.00 -inf - +inf	y	Vertical position
	Double 0.00 0.00- +inf	width	Horizontal position
	Double 0.00 0.00- +inf	height	Vertical position
	Color rgb(1.0000, 1.0000, 1.0000)	color	Color to render
	reflect
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Double 0.00 -inf - +inf	origin-x	X-coordinate of origin
	Double 0.00 -inf - +inf	origin-y	Y-coordinate of origin
	String linear	filter	Filter type (nearest, linear, lanczos, cubic)
	Boolean False	hard-edges	Hard edges
	Int 3 3-6	lanczos-width	Lanczos-width width of lanczos function
	Double 0.00 -inf - +inf	x	Direction vector's x component
	Double 0.00 -inf - +inf	y	Direction vector's y component
	remap
	Linearly remap the R,G,B based on per pixel minimum and maximum values from the high/low input pads
	rotate
	Rotate the buffer around the specfied origin.
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Double 0.00 -inf - +inf	origin-x	X-coordinate of origin
	Double 0.00 -inf - +inf	origin-y	Y-coordinate of origin
	String linear	filter	Filter type (nearest, linear, lanczos, cubic)
	Boolean False	hard-edges	Hard edges
	Int 3 3-6	lanczos-width	Lanczos-width width of lanczos function
	Double 0.00 -inf - +inf	degrees	Angle to rotate (clockwize)
	save-buffer
	A GEGL buffer destination surface.
	Object	input	Input pad, for image buffer input.
	Pointer	buffer	The location where to store the output GeglBuffer
	save-pixbuf
	Save output into a GdkPixbuf.
	Object	input	Input pad, for image buffer input.
	Pointer	pixbuf	The location where to store the output GdkPixuf.
	scale
	Scales the buffer.
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Double 0.00 -inf - +inf	origin-x	X-coordinate of origin
	Double 0.00 -inf - +inf	origin-y	Y-coordinate of origin
	String linear	filter	Filter type (nearest, linear, lanczos, cubic)
	Boolean False	hard-edges	Hard edges
	Int 3 3-6	lanczos-width	Lanczos-width width of lanczos function
	Double 1.00 -inf - +inf	x	Horizontal scale factor.
	Double 1.00 -inf - +inf	y	Vertical scale factor.
	screen
	SVG blend operation screen (d = cA + cB - cA * cB)
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	shear
	Shears the buffer.
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Double 0.00 -inf - +inf	origin-x	X-coordinate of origin
	Double 0.00 -inf - +inf	origin-y	Y-coordinate of origin
	String linear	filter	Filter type (nearest, linear, lanczos, cubic)
	Boolean False	hard-edges	Hard edges
	Int 3 3-6	lanczos-width	Lanczos-width width of lanczos function
	Double 1.00 -inf - +inf	x	Horizontal shear amount.
	Double 1.00 -inf - +inf	y	Vertical shear amount.
	shift
	Shift the contents of a buffer
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Double 0.00 -inf - +inf	x	X-axis shift
	Double 0.00 -inf - +inf	y	Y-axis shift
	snn-mean
	Noise reducing edge enhancing blur filter based on Symmetric Nearest Neighbours
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Double 8.00 0.00-70.00	radius	Radius of square pixel region, (width and height will be radius*2+1)
	Int 2 1-2	pairs	Number of pairs higher number preserves more acute features
	soft-light
	SVG blend operation soft-light (if 2 * cA < aA: d = cB * (aA - (aB == 0 ? 1 : 1 - cB / aB) * (2 * cA - aA)) + cA * (1 - aB) + cB * (1 - aA); if 8 * cB <= aB: d = cB * (aA - (aB == 0 ? 1 : 1 - cB / aB) * (2 * cA - aA) * (aB == 0 ? 3 : 3 - 8 * cB / aB)) + cA * (1 - aB) + cB * (1 - aA); otherwise: d = (aA * cB + (aB == 0 ? 0 : sqrt (cB / aB) * aB - cB) * (2 * cA - aA)) + cA * (1 - aB) + cB * (1 - aA))
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	src
	Porter Duff operation src (d = cA)
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	src-atop
	Porter Duff operation src-atop (d = cA * aB + cB * (1 - aA))
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	src-in
	Porter Duff operation src-in (d = cA * aB)
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	src-out
	Porter Duff operation src-out (d = cA * (1 - aB))
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	src-over
	Porter Duff operation src-over (d = cA + cB * (1 - aA))
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	stress
	Spatio Temporal Retinex-like Envelope with Stochastic Sampling.
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Int 300 2-5000	radius	Neighbourhood taken into account
	Int 10 0-1000	samples	Number of samples to do
	Int 10 0-1000	iterations	Number of iterations (length of exposure)
	Boolean True	same-spray	Use the same spray for all pixels
	Double 2.00 0.00-8.00	rgamma	Gamma applied to radial distribution
	Double 1.00 -10.00-10.00	strength	Amount of correction 0=none 1.0=full
	Double 1.00 0.00-10.00	gamma	Post correction gamma.
	stretch-contrast
	Scales the components of the buffer to be in the 0.0-1.0 range. This improves images that makes poor use of the available contrast (little contrast, very dark, or very bright images).
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	subtract
	Math operation subtract (c = c - value)
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	Double 0.00 -inf - +inf	value	global value used if aux doesn't contain data
	svg-huerotate
	SVG color matrix operation svg_huerotate
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	String	values	list of s
	svg-load
	Load an SVG file using librsvg
	Object	output	Ouput pad for generated image buffer.
	Path	path	Path to SVG file to load
	Int 100 1- +inf	width	Width for rendered image
	Int 100 1- +inf	height	Height for rendered image
	svg-luminancetoalpha
	SVG color matrix operation svg_luminancetoalpha
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	String	values	list of s
	svg-matrix
	SVG color matrix operation svg_matrix
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	String	values	list of s
	svg-multiply
	SVG blend operation svg-multiply (d = cA * cB + cA * (1 - aB) + cB * (1 - aA))
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	svg-saturate
	SVG color matrix operation svg_saturate
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	String	values	list of s
	text
	Display a string of text using pango and cairo.
	Object	output	Ouput pad for generated image buffer.
	Multiline Hello	string	String to display (utf8)
	String Sans	font	Font family (utf8)
	Double 10.00 1.00-2048.00	size	Approximate height of text in pixels.
	Color rgb(1.0000, 1.0000, 1.0000)	color	Color for the text (defaults to 'white')
	Int -1 -1-1000000	wrap	Sets the width in pixels at which long lines will wrap. Use -1 for no wrapping.
	Int 0 0-2	alignment	Alignment for multi-line text (0=Left, 1=Center, 2=Right)
	Int 0 0-1000000	width	Rendered width in pixels. (read only)
	Int 0 0-1000000	height	Rendered height in pixels. (read only)
	threshold
	Thresholds the image to white/black based on either the global value set in the value property, or per pixel from the aux input.
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.
	Double 0.50 -10.00-10.00	value	Global threshold level (used when there is no auxiliary input buffer).
	tonemap
	Local contrast enhancement
	Double 20.00 0.00-100.00	radius	radius
	Double 15.00 0.00-100.00	blur	blur
	Double 0.50 -1.00-2.00	amount	amount
	translate
	Repositions the buffer (with subpixel precision).
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Double 0.00 -inf - +inf	origin-x	X-coordinate of origin
	Double 0.00 -inf - +inf	origin-y	Y-coordinate of origin
	String linear	filter	Filter type (nearest, linear, lanczos, cubic)
	Boolean False	hard-edges	Hard edges
	Int 3 3-6	lanczos-width	Lanczos-width width of lanczos function
	Double 1.00 -inf - +inf	x	Horizontal translation.
	Double 1.00 -inf - +inf	y	Vertical translation.
	unsharp-mask
	Performs an unsharp mask on the input buffer (sharpens an image by adding false mach-bands around edges).
	Double 1.00 0.00-100.00	std-dev	Standard deviation (spatial scale factor)
	Double 1.00 0.00-100.00	scale	Scale, strength of effect.
	v4l
	Video4Linux input, webcams framegrabbers and similar devices.
	Object	output	Ouput pad for generated image buffer.
	Path /dev/video0	path	Path to v4l device
	Int 320 0- +inf	width	Width for rendered image
	Int 240 0- +inf	height	Height for rendered image
	Int 0 0- +inf	frame	current frame number, can be changed to trigger a reload of the image.
	value-invert
	Inverts just the value component, the result is the corresponding `inverted' image.
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	whitebalance
	Allows changing the whitepoint and blackpoint of an image.
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Double 0.00 -2.00-2.00	high-a-delta	not documented
	Double 0.00 -2.00-2.00	high-b-delta	not documented
	Double 0.00 -2.00-2.00	low-a-delta	not documented
	Double 0.00 -2.00-2.00	low-b-delta	not documented
	Double 1.00 -3.00-3.00	saturation	not documented
	write-buffer
	A GEGL buffer destination surface.
	Object	input	Input pad, for image buffer input.
	Object	buffer	Write to an existing GeglBuffer
	xor
	Porter Duff operation xor (d = cA * (1 - aB)+ cB * (1 - aA))
	Object	output	Ouput pad for generated image buffer.
	Object	input	Input pad, for image buffer input.
	Object	aux	Auxiliary image buffer input pad.