Caxton

This is a major update to Caxton.

Lazy glyph uploading

This release changes the way glyphs are uploaded to the GPU. Previously, all glyphs would be put in a texture atlas and uploaded to VRAM eagerly during loading, which was wasteful for large fonts. This version uploads each glyph if and when it is needed.

Note that MTSDF calculation is still done eagerly, as it takes about 50 ms per glyph.

Cached glyph storage

MTSDF calculations are now done in parallel, using all available CPUs. The file format for this information has also been changed.

Other additions

• /caxtondumpatlas command to dump the dynamic texture atlas
• debugRefcountChanges global option
• font_scale option to font provider
  • This sets the scale at which the font should be drawn relative to the default
• caxton_providers key in font JSON
  • Acts like providers but will be ignored when Caxton is not installed.

Changes and fixes

• margin now defaults to range in font metadata
• range now has a hard limit of 255
• Underlines and strikethroughs now draw with at least 1 pixel of thickness
• Text fields now draw placeholder text in the 1.19.3 version
• Add fixes for multi-line edit boxes (1.19.2 and later)
• Fix compatibility with TweakerMore’s disableSignTextLengthLimit feature
• Fix a bug where line-wrapping certain text containing RTL scripts would return the text in the wrong order
• Fix various layout-related crashes