GEGL graph to fill a layer with a rotated pattern

GEGL graph to fill a layer with a rotated pattern - Printable Version

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+--- Thread: GEGL graph to fill a layer with a rotated pattern (/Thread-GEGL-graph-to-fill-a-layer-with-a-rotated-pattern)

GEGL graph to fill a layer with a rotated pattern - tmanni - 07-04-2019

Considere this 400x300 image:

[attachment=2995]

The common way to do this in gimp is :
- create a 800x600 layer (double size compared to image canvas)
- fill it with Filters > Render > Pattern > Checkerboard
- use the unified transform tool to rotate and translate the layer
- crop the layer to the image size

Now with GEGL graph:
- create a 400x300 layer
- run Filters > Generic > GEGL graph and copy paste the text below in the pipeline field

Code:

checkerboard

  x=25

  y=25

  color1=maroon

  color2=silver

rotate

  degrees=45

  origin-x=200

  origin-y=150

Et voilà!

Note that the indentation is only for better visualisation, it is not needed, all can be writen in one line

Code:

checkerboard x=25 y=25 color1=maroon color2=silver rotate degrees=45 origin-x=200 origin-y=150

Another example:
[attachment=2996]

Code:

color value=yellow

over

  aux=[

    grid 

      x=64 

      line-width=32

      line-height=0

      line-color=black

   rotate

      degrees=45

  ]

RE: GEGL graph to fill a layer with a rotated pattern - Ofnuts - 07-04-2019

You have been bestowed the highly regarded title of "Resident GEGL expert". Congratulations!

RE: GEGL graph to fill a layer with a rotated pattern - tmanni - 07-04-2019

(07-04-2019, 04:46 PM)Ofnuts Wrote: You have been bestowed the highly regarded title of "Resident GEGL expert". Congratulations!

Thanks , Ofnuts.
As a GEGL code contributor, I try to use a lot filters and graph to find new bugs and new usages.