This duplicates some of the logic in UpdateFontsNewFrame() which is a bit chicken-and-eggy/tricky to extract due to variety of codepaths and possible

Window has already passed the IsWindowNavFocusable()

Retrieve list of range (2 int per range, values are inclusive)

This is only used in rare/specific situations to manufacture an ID out of nowhere. FIXME: Consider instead storing last non-zero ID + count of success

As we allow to change document name, we append a never-changing document ID so tabs are stable

Closely mimics PathBezierToCasteljau() in imgui_draw.cpp

Those functions are designed to facilitate changing the underlying structures for ImFontAtlas to store an array of ImDrawListSharedData

FIXME: Code is duplicated with code above.

FIXME-OPT: This is not a fast query. Adding a BakedCount field in Font might allow to take a shortcut for the most common case.

Important! This assume by ImFontConfig::GlyphExcludeRanges[] is a SMALL ARRAY (e.g. <10 entries) Use "Input Glyphs Overlap Detection Tool" to display

Preload all glyph ranges for legacy backends. This may lead to multiple texture creation which might be a little slower than before.

Create a compact, baked "..." if it doesn't exist, by using the ".". This may seem overly complicated right now but the point is to exercise and impro

Setup main font loader for the atlas Every font source (ImFontConfig) will use this unless ImFontConfig::FontLoader specify a custom loader.

Load/identify special glyphs (note that this is called again for fonts with MergeMode)

This is essentially a free-list pattern, it may be nice to wrap it into a dedicated type.

Overwrite existing entry

Source buffer may be written to (used for in-place mods). Post-process hooks may eventually be added here.

You should not need to call this manually! If you think you do, let us know and we can advise about policies auto-compact.

Update texture identifier in all active draw lists

Called by NewFrame() for atlases owned by a context. If you manually manage font atlases, you'll need to call this yourself. - 'frame_count' needs to