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.

edge

edge-detect

porter-duff

effects

blend

distort

enhance

video

compositors

svgfilter

misc

render

input

blur

math

core

transform

color

programming

display

transparency

output

meta

tonemapping

  gegl:add
  Math operation add (c = c + value)
  Object
output Output 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
  gegl: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 Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Double
4.00
0.00-1000.00
blur-radius Radius of square pixel region, (width and height will be radius*2+1).
  Double
8.00
0.00-100.00
edge-preservation Amount of edge preservation
  gegl:box-blur
  Performs an averaging of a square box of pixels
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Double
4.00
0.00-1000.00
radius Radius of square pixel region, (width and height will be radius*2+1)
  gegl:brightness-contrast
  Changes the light level and contrast.
  Object
output Output 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
  gegl:buffer-sink
  A GEGL buffer destination surface.
  Object
input Input pad, for image buffer input.
  Pointer
buffer The location where to store the output GeglBuffer
  Pointer
format The babl format of the output GeglBuffer, NULL to use input buffer format
  gegl:buffer-source
  A source that uses an in-memory GeglBuffer, for use internally by GEGL.
  Object
output Output pad for generated image buffer.
  Object
buffer The GeglBuffer to load into the pipeline
  gegl:c2g
  Color to grayscale conversion, uses envelopes formed from spatial color differences to perform color-feature preserving grayscale spatial contrast enhancement
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  int
300
2-3000
radius Neighborhood taken into account, this is the radius in pixels taken into account when deciding which colors map to which gray values
  int
4
1-1000
samples Number of samples to do per iteration looking for the range of colors
  int
10
1-1000
iterations Number of iterations, a higher number of iterations provides less noisy results at a computational cost
  gegl:checkerboard
  Checkerboard renderer
  Object
output Output 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')
  gegl:clone
  Clone a buffer
  Object
output Output 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).
  gegl:color
  Generates a buffer entirely filled with the specified color, crop it to get smaller dimensions.
  Object
output Output pad for generated image buffer.
  Color
rgb(0.0000, 0.0000, 0.0000)
value The color to render (defaults to 'black')
  gegl:color-temperature
  Allows changing the color temperature of an image.
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Double
6500.00
1000.00-12000.00
original-temperature Estimated temperature of the light source in Kelvin the image was taken with.
  Double
6500.00
1000.00-12000.00
intended-temperature Corrected estimation of the temperature of the light source in Kelvin.
  gegl:color-to-alpha
  Performs color-to-alpha on the image.
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Color
rgb(0.0000, 0.0000, 0.0000)
color The color to render (defaults to 'black')
  gegl:contrast-curve
  Adjusts the contrast of the image according to a curve.
  Object
output Output 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.
  gegl:convert-format
  Convert the data to the specified format
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  String
RGBA float.
format Babl output format string
  gegl:crop
  Crop a buffer
  Object
output Output 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
  gegl:difference-of-gaussians
  Does an edge detection based on the difference of two gaussian blurs.
  Double
1.00
0.00-1000.00
radius1 Radius
  Double
2.00
0.00-1000.00
radius2 Radius
  gegl:display
  Display the input buffer in a window.
  Object
input Input pad, for image buffer input.
  String
window_titl
window-title Title to be given to output window
  gegl:divide
  Math operation divide (c = value==0.0f?0.0f:c/value)
  Object
output Output 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
  gegl:dropshadow
  Creates a dropshadow effect on the input buffer
  Double
0.50
-2.00-2.00
opacity Opacity
  Double
20.00
-inf - +inf
x Horizontal shadow offset
  Double
20.00
-inf - +inf
y Vertical shadow offset
  Double
10.00
0.00- +inf
radius Blur radius
  gegl:edge-laplace
  High-resolution edge detection
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  gegl:edge-sobel
  Specialized direction-dependent edge detection
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Boolean
True
horizontal Horizontal
  Boolean
True
vertical Vertical
  Boolean
True
keep-signal Keep Signal
  gegl:exp-combine
  Combine multiple scene exposures into one high range buffer
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  String
exposures Relative brightness of each exposure in EV
  Int
12
8-32
steps Log2 of source's discretization steps
  Double
8.00
0.00-32.00
sigma Weight distrubtion sigma controlling response contributions
  gegl:exr-save
  OpenEXR image saver
  Object
input Input pad, for image buffer input.
  String
path path of file to write to.
  Int
0
0-2048
tile tile size to use.
  gegl:fattal02
  Adapt an image, which may have a high dynamic range, for presentation using a low dynamic range. This operator attenuates the magnitudes of local image gradients, producing luminance within the range 0.0-1.0
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Double
1.00
0.00-2.00
alpha Gradient threshold for detail enhancement
  Double
0.90
0.10-2.00
beta Strength of local detail enhancement
  Double
0.80
0.00-1.00
saturation Global color saturation factor
  Double
0.00
0.00-1.00
noise Gradient threshold for lowering detail enhancement
  gegl:ff-load
  FFmpeg video frame importer
  Object
output Output pad for generated image buffer.
  FilePath
/home/pippi
path Path of file to load
  Int
0
0-1000000
frame Frame number
  gegl:fill-path
  Renders a filled region
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Color
rgba(0.0000, 0.0000, 0.0000, 0.6000)
color Color of paint to use for filling.
  Double
1.00
-2.00-2.00
opacity The fill opacity to use.
  String
nonzero
fill-rule how to determine what to fill (nonzero|evenodd
  String
transform svg style description of transform.
  Path
d A GeglVector representing the path of the stroke
  gegl:fractal-explorer
  Fractal Explorer
  Object
output Output pad for generated image buffer.
  int
400
1-10000000
width Width
  int
400
1-10000000
height Height
  Int
0
0-8
fractaltype Type of a fractal
  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
  gegl:gamma
  Math operation gamma (c = powf (c, value))
  Object
output Output 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
  gegl:gaussian-blur
  Performs an averaging of neighboring pixels with the normal distribution as weighting
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Double
4.00
0.00-10000.00
std-dev-x Standard deviation for the horizontal axis. (multiply by ~2 to get radius)
  Double
4.00
0.00-10000.00
std-dev-y Standard deviation for the vertical axis. (multiply by ~2 to get radius.)
  String
auto
filter Optional parameter to override the automatic selection of blur filter. Choices are fir, iir, auto
  gegl:grey
  Turns the image greyscale
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  gegl:grid
  Grid renderer
  Object
output Output pad for generated image buffer.
  int
32
1- +inf
x Horizontal width of cells pixels
  int
32
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
  int
4
0- +inf
line-width Width of grid lines in pixels
  int
4
0- +inf
line-height Height of grid lines in pixels
  Color
rgb(0.0000, 0.0000, 0.0000)
line-color Color of the grid lines
  gegl:introspect
  GEGL graph visualizer.
  Object
output Output pad for generated image buffer.
  Object
node GeglNode to introspect
  gegl:invert
  Inverts the components (except alpha), the result is the corresponding "negative" image.
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  gegl:jpg-save
  JPEG 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
90
1-100
quality JPEG compression quality (between 1 and 100)
  Int
0
0-100
smoothing Smoothing factor from 1 to 100; 0 disables smoothing
  Boolean
True
optimize Use optimized huffman tables
  Boolean
True
progressive Create progressive JPEG images
  Boolean
False
grayscale Create a grayscale (monochrome) image
  gegl:layer
  A layer in the traditional sense
  String
gegl: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
  FilePath
src Source datafile (png, jpg, raw, svg, bmp, tif, ...)
  gegl:lens-distortion
  Copies image performing lens distortion correction.
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Double
0.00
-100.00-100.00
main Main value of distortion
  Double
0.00
-100.00-100.00
zoom Main value of distortion
  Double
0.00
-100.00-100.00
edge Edge value of distortion
  Double
0.00
-100.00-100.00
brighten Brighten the image
  Double
0.00
-100.00-100.00
x-shift Shift horizontal
  Double
0.00
-100.00-100.00
y-shift Shift vertical
  gegl:levels
  Remaps the intensity range of the image
  Object
output Output 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
  gegl:load
  Multipurpose file loader, that uses other native handlers, and fallback conversion using image magick's convert.
  FilePath
path Path of file to load.
  gegl:mantiuk06
  Adapt an image, which may have a high dynamic range, for presentation using a low dynamic range. This operator constrains contrasts across multiple spatial frequencies, producing luminance within the range 0.0-1.0
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Double
0.10
0.00-1.00
contrast The amount of contrast compression
  Double
0.80
0.00-2.00
saturation Global colour saturation factor
  Double
1.00
1.00-99.00
detail Level of emphasis on image gradient details
  gegl:map-absolute
  sample input with an auxiliary buffer that contain absolute source coordinates
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  Enum
sampler-type Sampler used internaly
  gegl:map-relative
  sample input with an auxiliary buffer that contain relative source coordinates
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  Double
1.00
0.00-5000.00
scaling scaling factor of displacement, indicates how large spatial displacement a relative mapping value of 1.0 corresponds to.
  Enum
sampler-type Sampler used internaly
  gegl:matting-global
  Given a sparse user supplied tri-map and an input image, create a foreground alpha matte. Set white as foreground, black as background for the tri-map. Everything else will be treated as unknown and filled in.
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  Int
10
1- +inf
iterations Number of iterations
  gegl:mblur
  Accumulating motion blur
  Object
output Output 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.
  gegl:mirrors
  Applies mirroring effect on the image.
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Double
0.00
0.00-180.00
m-angle Rotation applied to the mirrors
  Double
0.00
0.00-360.00
r-angle Rotation applied to the result
  Int
6
2-24
n-segs Number of mirrors to use
  Double
0.50
0.00-1.00
c-x X offset of the result of mirroring
  Double
0.50
0.00-1.00
c-y Y offset of the result of mirroring
  Double
0.00
-1.00-1.00
o-x X axis ratio for the center of mirroring
  Double
0.00
-1.00-1.00
o-y Y axis ratio for the center of mirroring
  Double
0.00
0.00-0.50
trim-x X axis ratio for trimming mirror expanse
  Double
0.00
0.00-0.50
trim-y Y axis ratio for trimming mirror expanse
  Double
100.00
0.10-100.00
input-scale Scale factor to make rendering size bigger
  Double
1.00
0.00-100.00
output-scale Scale factor to make rendering size bigger
  Boolean
True
clip Clip result to input size
  Boolean
True
warp Fill full output area
  gegl:mono-mixer
  Monochrome channel mixer
  Object
output Output 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
  gegl:motion-blur
  Linear motion blur
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Double
10.00
0.00-1000.00
length Length of blur in pixels
  Double
0.00
-360.00-360.00
angle Angle of blur in degrees
  gegl:multiply
  Math operation multiply (c = c * value)
  Object
output Output 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
  gegl:noise-reduction
  Anisotropic like smoothing operation
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  int
4
0-32
iterations How many iteratarions to run the algorithm with
  gegl:nop
  No operation (can be used as a routing point)
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  gegl:opacity
  Weights the opacity of the input both the value of the aux input and the global value property.
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  Double
1.00
-10.00-10.00
value Global opacity value that is always used on top of the optional auxiliary input buffer.
  gegl:open-buffer
  A source that uses an on-disk GeglBuffer.
  Object
output Output pad for generated image buffer.
  String
path a GeglBuffer on disk to open
  gegl:path
  Renders a brush stroke
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Color
rgba(0.0000, 0.0000, 0.0000, 0.6000)
fill Color of paint to use for filling, use 0 opacity to disable filling
  Color
rgba(0.0000, 0.0000, 0.0000, 0.0000)
stroke Color of paint to use for stroking
  Double
2.00
0.00-200.00
stroke-width The width of the brush used to stroke the path
  Double
1.00
-2.00-2.00
stroke-opacity Opacity of stroke, note, does not behave like SVG since at the moment stroking is done using an airbrush tool
  Double
0.60
0.00-1.00
stroke-hardness Hardness of the brush, 0.0 for a soft brush, 1.0 for a hard brush
  String
nonzero
fill-rule How to determine what to fill (nonzero|evenodd
  String
transform SVG style description of transform
  Double
1.00
-2.00-2.00
fill-opacity The fill opacity to use
  Path
d A GeglVector representing the path of the stroke
  gegl:perlin-noise
  Perlin noise generator
  Object
output Output 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
  gegl:pixbuf
  Uses the GdkPixbuf located at the memory location in pixbuf.
  Object
output Output pad for generated image buffer.
  Pointer
pixbuf GdkPixbuf to use
  gegl:pixelize
  Simplify image into an array of solid-colored squares
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  int
16
1-123456
size-x Width of blocks in pixels
  int
16
1-123456
size-y Height of blocks in pixels
  gegl: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
  Int
16
8-16
bitdepth 8 and 16 are amongst the currently accepted values.
  gegl:polar-coordinates
  Performs polar-coordinates on the image.
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Double
100.00
0.00-100.00
depth Circle depth in percent
  Double
0.00
0.00-359.90
angle Offset angle.
  Boolean
False
bw Start from the right instead of the left
  Boolean
True
top Put the top row in the middle and the bottom row on the outside
  Boolean
True
polar Map the image to a circle
  Int
0
0- +inf
pole-x Origin point for the polar coordinates
  Int
0
0- +inf
pole-y Origin point for the polar coordinates
  Boolean
True
middle Let origin point to be the middle one
  gegl:posterize
  Reduces the number of levels in each color component of the image.
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  int
8
1-64
levels number of levels per component
  gegl:ppm-save
  PPM image saver (Portable pixmap saver.)
  Object
input Input pad, for image buffer input.
  String
path Target path and filename, use '-' for stdout.
  Boolean
True
rawformat Raw format
  Int
16
8-16
bitdepth 8 and 16 are amongst the currently accepted values.
  gegl: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 extent
  Double
0.00
0.00- +inf
height Vertical extent
  Color
rgb(1.0000, 1.0000, 1.0000)
color Color to render
  gegl:reflect
  Object
output Output 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, lohalo)
  Boolean
False
hard-edges Hard edges
  Int
3
3-6
lanczos-width Width of the Lanczos function
  Double
0.00
-inf - +inf
x Direction vector's X component
  Double
0.00
-inf - +inf
y Direction vector's Y component
  gegl:reinhard05
  Adapt an image, which may have a high dynamic range, for presentation using a low dynamic range. This is an efficient global operator derived from simple physiological observations, producing luminance within the range 0.0-1.0
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Double
0.00
-100.00-100.00
brightness Overall brightness of the image
  Double
0.00
0.00-1.00
chromatic Adapation to colour variation across the image
  Double
1.00
0.00-1.00
light Adapation to light variation across the image
  gegl:remap
  stretch components of pixels individually based on luminance envelopes
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  Object
aux2 Second auxiliary image buffer input pad.
  gegl:rgbe-save
  RGBE image saver (Radiance HDR format)
  Object
input Input pad, for image buffer input.
  String
path Target path and filename, use '-' for stdout.
  gegl:ripple
  Transform the buffer with a ripple pattern
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Double
25.00
0.00-1000.00
amplitude Amplitude of the ripple
  Double
200.00
0.00-1000.00
period Period of the ripple
  Double
0.00
-1.00-1.00
phi Phase shift
  Double
0.00
-180.00-180.00
angle Angle in degree
  Enum
sampler-type Sampler used internally
  Enum
wave-type Type of wave
  gegl:rotate
  Rotate the buffer around the specified origin.
  Object
output Output 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, lohalo)
  Boolean
False
hard-edges Hard edges
  Int
3
3-6
lanczos-width Width of the Lanczos function
  Double
0.00
-inf - +inf
degrees Angle to rotate (clockwise)
  gegl:save
  Multipurpose file saver, that uses other native handlers.
  Object
input Input pad, for image buffer input.
  FilePath
path Path of file to save.
  gegl:save-pixbuf
  Save output into a GdkPixbuf.
  Object
input Input pad, for image buffer input.
  Pointer
pixbuf The location where to store the output GdkPixbuf.
  gegl:scale
  Scales the buffer.
  Object
output Output 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, lohalo)
  Boolean
False
hard-edges Hard edges
  Int
3
3-6
lanczos-width Width of the Lanczos function
  Double
1.00
-inf - +inf
x Horizontal scale factor
  Double
1.00
-inf - +inf
y Vertical scale factor
  gegl:sdl-display
  Displays the input buffer in an SDL window (restricted to one display op/process, due to SDL implementation issues).
  Object
input Input pad, for image buffer input.
  String
window_titl
window-title Title to be given to 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
  gegl:shear
  Shears the buffer
  Object
output Output 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, lohalo)
  Boolean
False
hard-edges Hard edges
  Int
3
3-6
lanczos-width Width of the Lanczos function
  Double
1.00
-inf - +inf
x Horizontal shear amount
  Double
1.00
-inf - +inf
y Vertical shear amount
  gegl:snn-mean
  Noise reducing edge enhancing blur filter based on Symmetric Nearest Neighbours
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  int
8
0-100
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
  gegl: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 Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  gegl:stress
  Spatio Temporal Retinex-like Envelope with Stochastic Sampling
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  int
300
2-5000
radius Neighborhood taken into account, for enhancement ideal values are close to the longest side of the image, increasing this increases the runtime
  int
5
2-200
samples Number of samples to do per iteration looking for the range of colors
  int
5
1-200
iterations Number of iterations, a higher number of iterations provides a less noisy rendering at a computational cost
  gegl:stretch-contrast
  Scales the components of the buffer to be in the 0.0-1.0 range. This improves images that make poor use of the available contrast (little contrast, very dark, or very bright images).
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  gegl:subtract
  Math operation subtract (c = c - value)
  Object
output Output 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
  gegl:svg-huerotate
  SVG color matrix operation svg_huerotate
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  String
values list of s
  gegl:svg-load
  Load an SVG file using librsvg
  Object
output Output pad for generated image buffer.
  FilePath
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
  gegl:svg-luminancetoalpha
  SVG color matrix operation svg_luminancetoalpha
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  String
values list of s
  gegl:svg-matrix
  SVG color matrix operation svg_matrix
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  String
values list of s
  gegl:svg-multiply
  SVG blend operation svg-multiply (d = cA * cB + cA * (1 - aB) + cB * (1 - aA))
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  gegl:svg-saturate
  SVG color matrix operation svg_saturate
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  String
values list of s
  gegl:text
  Display a string of text using pango and cairo.
  Object
output Output 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(0.0000, 0.0000, 0.0000)
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)
  gegl: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 Output 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).
  gegl:transform
  Transforms the group (used by svg).
  Object
output Output 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, lohalo)
  Boolean
False
hard-edges Hard edges
  Int
3
3-6
lanczos-width Width of the Lanczos function
  String
transform Transformation string
  gegl:translate
  Repositions the buffer (with subpixel precision), if integer coordinates are passed a fast-path without resampling is used
  Object
output Output 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, lohalo)
  Boolean
False
hard-edges Hard edges
  Int
3
3-6
lanczos-width Width of the Lanczos function
  Double
1.00
-inf - +inf
x Horizontal translation
  Double
1.00
-inf - +inf
y Vertical translation
  gegl:unsharp-mask
  Performs an unsharp mask on the input buffer (sharpens an image by adding false mach-bands around edges)
  Double
1.00
0.00-500.00
std-dev Standard deviation (spatial scale factor)
  Double
1.00
0.00-100.00
scale Scale, strength of effect
  gegl:value-invert
  Inverts just the value component, the result is the corresponding `inverted' image.
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  gegl:vector-stroke
  Renders a vector stroke
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Color
rgba(0.0000, 0.0000, 0.0000, 0.0000)
color Color of paint to use for stroking.
  Double
2.00
0.00-200.00
width The width of the brush used to stroke the path.
  Double
1.00
-2.00-2.00
opacity Opacity of stroke, note, does not behave like SVG since at the moment stroking is done using an airbrush tool.
  String
transform svg style description of transform.
  Path
d A GeglVector representing the path of the stroke
  gegl:vignette
  A vignetting op, applies a vignette to an image. Simulates the luminance fall off at edge of exposed film, and some other fuzzier border effects that can naturally occur with analoge photograpy.
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Int
0
0-2
shape Shape to use: 0=circle 1=diamond 2=square
  Color
rgb(0.0000, 0.0000, 0.0000)
color Defaults to 'black', you can use transparency here to erase portions of an image
  Double
1.50
0.00-3.00
radius How far out vignetting goes as portion of half image diagonal
  Double
0.80
0.00-1.00
softness Softness
  Double
2.00
1.00-20.00
gamma Falloff linearity
  Double
1.00
0.00-1.00
proportion How close we are to image proportions
  Double
0.00
-1.00-1.00
squeeze Aspect ratio to use, -0.5 = 1:2, 0.0 = 1:1, 0.5 = 2:1, -1.0 = 1:inf 1.0 = inf:1, this is applied after proportion is taken into account, to directly use squeeze factor as proportions, set proportion to 0.0.
  Double
0.50
-1.00-2.00
x Horizontal center of vignetting
  Double
0.50
-1.00-2.00
y Vertical center of vignetting
  Double
0.00
0.00-360.00
rotation Rotation angle
  gegl:waves
  Transform the buffer with waves
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Double
0.00
-inf - +inf
x X coordinate of the center of the waves
  Double
0.00
-inf - +inf
y Coordinate y of the center of the waves
  Double
25.00
0.00-1000.00
amplitude Amplitude of the ripple
  Double
200.00
0.00-1000.00
period Period of the ripple
  Double
0.00
-1.00-1.00
phi Phase shift
  Enum
sampler-type Sampler used internally
  gegl:weighted-blend
  blend two images using alpha values as weights
  Object
output Output 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
  gegl:write-buffer
  A GEGL buffer destination surface.
  Object
input Input pad, for image buffer input.
  Object
buffer Write to an existing GeglBuffer
  svg:clear
  Porter Duff operation clear (d = 0.0f)
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg: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 Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg: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 Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg:darken
  SVG blend operation darken (d = MIN (cA * aB, cB * aA) + cA * (1 - aB) + cB * (1 - aA))
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg:difference
  SVG blend operation difference (d = cA + cB - 2 * (MIN (cA * aB, cB * aA)))
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg:dst
  Porter Duff operation dst (d = cB)
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg:dst-atop
  Porter Duff operation dst-atop (d = cB * aA + cA * (1.0f - aB))
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg:dst-in
  Porter Duff operation dst-in (d = cB * aA)
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg:dst-out
  Porter Duff operation dst-out (d = cB * (1.0f - aA))
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg:dst-over
  Porter Duff operation dst-over (d = cB + cA * (1.0f - aB))
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg:exclusion
  SVG blend operation exclusion (d = (cA * aB + cB * aA - 2 * cA * cB) + cA * (1 - aB) + cB * (1 - aA))
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg: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 Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg:lighten
  SVG blend operation lighten (d = MAX (cA * aB, cB * aA) + cA * (1 - aB) + cB * (1 - aA))
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg: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 Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg:plus
  SVG blend operation plus (d = cA + cB)
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg:screen
  SVG blend operation screen (d = cA + cB - cA * cB)
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg:src
  Porter Duff operation src (d = cA)
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg:src-atop
  Porter Duff operation src-atop (d = cA * aB + cB * (1.0f - aA))
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg:src-in
  Porter Duff operation src-in (d = cA * aB)
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg:src-out
  Porter Duff operation src-out (d = cA * (1.0f - aB))
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg:src-over
  Porter Duff operation src-over (d = cA + cB * (1.0f - aA))
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg:src-over
  Porter Duff operation over (d = cA + cB * (1 - aA))
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.
  svg:xor
  Porter Duff operation xor (d = cA * (1.0f - aB)+ cB * (1.0f - aA))
  Object
output Output pad for generated image buffer.
  Object
input Input pad, for image buffer input.
  Object
aux Auxiliary image buffer input pad.