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Add FreeInkBook EPUB engine migration guide

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Document migration plan from CrossPoint's lib/Epub to FreeInkBook, a memory-efficient clean-room EPUB engine. Covers advantages (O(paragraph+page) memory via SAX parsing, arena allocation, host-testable, full UAX#14 typography, runtime TTF/OTF support), 9-step migration strategy, ESP32-C3 constraints, and integration approach preserving existing UI layer while replacing parsing/layout stack.
This commit is contained in:
Justin Mitchell
2026-07-08 00:22:21 -04:00
parent 5776911af0
commit 0848649ce2
49 changed files with 1065 additions and 15633 deletions
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lib/EpdFont/EpdFontFamily.h
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@@ -26,7 +26,9 @@ class EpdFontFamily {
void getTextDimensions(const char* string, int* w, int* h, Style style = REGULAR) const;
const EpdFontData* getData(Style style = REGULAR) const;
const EpdGlyph* getGlyph(uint32_t cp, Style style = REGULAR) const;
bool hasGlyph(uint32_t cp, Style style = REGULAR) const;
int8_t getKerning(uint32_t leftCp, uint32_t rightCp, Style style = REGULAR) const;
uint32_t getLigature(uint32_t leftCp, uint32_t rightCp, Style style = REGULAR) const;
uint32_t applyLigatures(uint32_t cp, const char*& text, Style style = REGULAR) const;
static constexpr bool hasTextDecoration(const Style style) {
return (static_cast<uint8_t>(style) & TEXT_DECORATION_MASK) != 0;