CONTRIBUTE.md

Contribute

Contributions are very welcome. Before investing serious effort, please create an issue to discuss target functionality and architecture.

TTF reader/writer:

• read TTF
• write TTF
• create TTF subsets
• provide font dimensions to measure text

PDF backend:

• print images
• print & style drawings (lines & rectangles)
• print & style text
• use TTF fonts
• use UTF-8 text

paragraphs:

• support different text styles in same paragraphs
• calculate dimensions of text
• automatic line-breaking
• alignment (center, right-align, justify)

layouts:

• design layout system
• implement block
• implement flow
• implement grid
• implement table

layout blocks:

• margin
• padding
• border (color, thickness, stroke style)
• background (color)

support more content types:

• png, svg, esp, ...
• video, audio, ... (?)

extend layout support:

• improve line breaking (knuth & plass line-breaking instead of greedy)
• alignment for blocks
• column/row spans for grids, tables
• auto, contain, cover for content types
• top/right/bottom/left different weight borders

extend drawing support:

• circles
• polynomials

extend PDF support:

• forms
• compress string streams
• optimize rectangle position (do not modify transform matrix)

Maintenance/architecture contributions

This is a large, long-lived project, and as such there are maintenance and architecture topics.

Known bugs / issues:

• Should use new enum construct instead of const
• Images of size 0 lead to crash
• Dependency injection missing, notably to inject custom configuration
• Unit tests should probably use a snapshot mechanism