Working on Krita:Fun&Profit Luk Tvrd 02.07.2010 | T ampere, - - PowerPoint PPT Presentation

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Working on Krita:Fun&Profit Luk Tvrd 02.07.2010 | T ampere, - - PowerPoint PPT Presentation

Jan 13, 2024 437 likes •670 views

Working on Krita:Fun&Profit Luk Tvrd 02.07.2010 | T ampere, Finland | Akademy 2010 Luk Tvrd Who I am Alumnus of VB-TU Ostrava, Czech Republic How did I get involved in Krita GSoC 2008: Sumi-e brush engine

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02.07.2010 | T ampere, Finland | Akademy 2010

Working on Krita:Fun&Profit

Lukáš Tvrdý

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Lukáš Tvrdý www.krita.org 2

Lukáš Tvrdý

  • Who I am
  • Alumnus of VŠB-TU Ostrava, Czech Republic
  • How did I get involved in Krita
  • GSoC 2008: Sumi-e brush engine
  • GSoC 2009: 3D Brush for Krita
  • Master Thesis: Brush Painting in 2D Raster

graphics

  • Community sponsored developer
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Lukáš Tvrdý www.krita.org 3

What is Krita

  • Krita is a KDE program:
  • sketching and painting,
  • creating digital painting files from scratch
  • concept art, creation of comics and textures for rendering.
  • to be both a painting application and a photo editor is hard:
  • UI problems
  • Human resources
  • Do the things really good
  • Still small support for photo manipulations
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Lukáš Tvrdý www.krita.org 4

What I'm working on

  • Brush engines
  • Hairy brush
  • Spray brush
  • Soft brush
  • Deform brush
  • Particle brush
  • Sketch brush
  • Hatching brush
  • And some more...
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Lukáš Tvrdý www.krita.org 5

What I have to work on

  • Action plan I,II
  • User readiness

–

e.g. supporting abr brushes

  • Performance

–

Valgrind, QtT est Framework: Benchmarks

  • Unit performance benchmarking

–

12x faster smudge, pixel iterators 6x faster,

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6x faster painting, vectorization effort

  • Usability

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UI improvements

  • Bugs
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Lukáš Tvrdý www.krita.org 6

What is brush engine?

  • Defines painting operation
  • Define how the stroke will look like
  • Lines or footprints
  • In GIMP tools (airbrush, pixel brush, duplicate tool)
  • In Krita brush engines (spray, pixel brush,

duplicate)

  • MyPaint has one big brush engine
  • http://mypaint.intilinux.com/
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Lukáš Tvrdý www.krita.org 7

Demonstration

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Lukáš Tvrdý www.krita.org 8

Samy Lunge

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Lukáš Tvrdý www.krita.org 9

David Revoy

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Lukáš Tvrdý www.krita.org 10

Samy Lunge - Fur

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Lukáš Tvrdý www.krita.org 11

David Revoy Angel

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Lukáš Tvrdý www.krita.org 12

Samy Lunge Samy Lunge - Rain

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Lukáš Tvrdý www.krita.org 13

Samy Lunge – Sumi-e style

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Lukáš Tvrdý www.krita.org 14

Samy Lunge Tree

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Lukáš Tvrdý www.krita.org 15

Przemek Golab Watercolor

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Lukáš Tvrdý www.krita.org 16

Przemek Golab Hairs

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Lukáš Tvrdý www.krita.org 17

David Revoy Times

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Lukáš Tvrdý www.krita.org 18

David Revoy – Charcoal test

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Lukáš Tvrdý www.krita.org 19

How to write a brush engine

  • Plug-ins
  • Have an idea, invent a new algorithm
  • KisPaintOp::paintAt() || KisPaintOp::paintLine()
  • Access to the pixel buffer through KisPainter, bitBlt pixel buffer
  • libbrush, libpaintop
  • Support for ABR, GBR, GIH
  • GUI options
  • Serialize the brush settings
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Lukáš Tvrdý www.krita.org 20

Do you want to join us?

  • Algorithms for image processing or
  • Graphics effects or
  • Physical simulations of liquids or
  • UI designer or
  • or you like to play...
  • How to join http://bit.ly/df55e3
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Lukáš Tvrdý www.krita.org 21

Contact

  • My blog
  • http://lukast.mediablog.sk/log
  • Official website
  • http://www.krita.org
  • Official forum
  • http://forum.kde.org/krita
  • IRC Channel
  • #krita at freenode
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Lukáš Tvrdý www.krita.org 22

Questions?