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

Working on Krita:Fun&Profit Lukáš Tvrdý 02.07.2010 | T ampere, Finland | Akademy 2010

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 Lukáš Tvrdý www.krita.org 2

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 ● Lukáš Tvrdý www.krita.org 3

What I'm working on ● Brush engines ● Hairy brush ● Spray brush ● Soft brush ● Deform brush ● Particle brush ● Sketch brush ● Hatching brush ● And some more... Lukáš Tvrdý www.krita.org 4

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, – 6x faster painting, vectorization effort – Usability ● UI improvements – Bugs ● Lukáš Tvrdý www.krita.org 5

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/ Lukáš Tvrdý www.krita.org 6

Demonstration Lukáš Tvrdý www.krita.org 7

Samy Lunge Lukáš Tvrdý www.krita.org 8

David Revoy Lukáš Tvrdý www.krita.org 9

Samy Lunge - Fur Lukáš Tvrdý www.krita.org 10

David Revoy Angel Lukáš Tvrdý www.krita.org 11

Samy Lunge Samy Lunge - Rain Lukáš Tvrdý www.krita.org 12

Samy Lunge – Sumi-e style Lukáš Tvrdý www.krita.org 13

Samy Lunge Tree Lukáš Tvrdý www.krita.org 14

Przemek Golab Watercolor Lukáš Tvrdý www.krita.org 15

Przemek Golab Hairs Lukáš Tvrdý www.krita.org 16

David Revoy Times Lukáš Tvrdý www.krita.org 17

David Revoy – Charcoal test Lukáš Tvrdý www.krita.org 18

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 ● Lukáš Tvrdý www.krita.org 19

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 Lukáš Tvrdý www.krita.org 20

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 Lukáš Tvrdý www.krita.org 21

Questions? Lukáš Tvrdý www.krita.org 22