GSoC/2020/StatusReports/LeonardoEmanuelSegovia: Difference between revisions

Revision as of 15:32, 19 July 2020

Dynamic Fill Layers in Krita using SeExpr

Abstract

Layers are one of the core concepts of digital painting. They allow artists to control different parts of their artwork at once, for instance, color, lighting, lineart, as well as texture. A key feature of them is their ability to be resized, composited, renamed, grouped or deleted independently of the rest of the document.

Patterns and textures are also essential components of an artist’s toolbox, allowing them to represent the intricacies of a physical material. They come in two forms: bitmap textures, which are images contained in e.g. PNG or OpenEXR files, or procedural textures, which are generated on the fly using their mathematical representation.

KDE’s Krita painting suite supports using patterns and textures through two types of layers, File or Fill Layers. However, neither of them let artists create dynamically generated content: File Layers are inherently static, and Fill Layers support only color fills (like Paint Layers) or basic pattern rendering.

The goal of this project is to let artists create dynamic content through a new, scriptable Fill Layer. To this effect, I integrated Disney Animation’s SeExpr expression language into Krita.

Components

This project is divided into the following objectives or goals:

SeExpr-based Fill Layer generator
Creation and management of SeExpr scripts
Integration tests
User documentation

Side goals included:

Feature support status across all our platforms
Multithread support for Fill Layers
ARM support for AppImages (including this project’s deliverables as well)

Fill Layer generator

WIP: https://phabricator.kde.org/T13337

Integration tests

User documentation

Multithreaded Fill Layers

AppImages support in ARM

Status

4.3 branch: awaiting review
master branch: awaiting review

Links

Proposal: https://summerofcode.withgoogle.com/projects/#6114015970852864
Phabricator task: https://phabricator.kde.org/T13097
SeExpr changes: https://invent.kde.org/lsegovia/seexpr/-/compare/master...amyspark%2FT13097-gsoc2020-seexpr
Merge requests: !380, !411
Blog posts: https://www.amyspark.me/blog/category/gsoc/

@@ Line 11: / Line 11: @@
 The goal of this project is to let artists create dynamic content through a new, scriptable Fill Layer. To this effect, I integrated Disney Animation’s SeExpr expression language into Krita.
-=== Objectives ===
+=== Components ===
-There are five parts to this project:
+This project is divided into the following objectives or goals:
-* Add SeExpr as a Fill Layer generator
+* SeExpr-based Fill Layer generator
-* Add UI for creation and editing of scripts
+* Creation and management of SeExpr scripts
-* Integrate scripts with the existing Resources system
 * Integration tests
 * User documentation
-In the course of the project, I also addressed:
+Side goals included:
+* Feature support status across all our platforms
 * Multithread support for Fill Layers
-* ARM support for AppImages (including this project's deliverables as well)
+* ARM support for AppImages (including this project’s deliverables as well)
 === Fill Layer generator ===