7993b2bb97
Add a complete SD card font subsystem that enables users to install and use custom fonts beyond the three built-in families. This combines the back-end firmware support (#1327) with the font configuration, build pipeline, CI distribution, and user-facing management UI (#1392). Core font system: - Custom .cpfont binary format (v4) with multi-style support (regular, bold, italic, bold-italic) packed into a single file per size - On-demand glyph loading from SD card with two-pass prewarm rendering to bulk-read glyphs per page, achieving near-flash performance for Latin text (~697ms vs ~681ms) and viable CJK rendering (~32% slower) - Persistent advance cache for layout measurement without SD I/O - Overflow ring buffer for glyph cache misses during rendering - Memory-conscious design: only advance tables kept in RAM; glyph bitmaps, kern tables, and ligatures loaded on demand from SD Font management: - On-device WiFi download from GitHub Releases with manifest-based discovery, install/update detection, and progress UI - Web interface font upload, listing, and deletion via /fonts page - Manual SD card copy to /fonts/ or /.fonts/ directories - Font selection integrated into Settings > Reader > Font Family Build pipeline: - Declarative YAML config (sd-fonts.yaml) as single source of truth for the 17-family font library (serif, sans, mono, accessibility) - Python converter (fontconvert_sdcard.py) for TTF/OTF to .cpfont with FreeType rasterization, class-based kerning, and ligature extraction - Parallel build orchestrator with variable font instance extraction - CI workflow publishing versioned + stable releases to a dedicated crosspoint-fonts repository with auto-incrementing revision tags - Centralized version constants (cpfont_version.py) shared across build tooling and CI, with firmware headers as manual sync points Additional fixes: - CJK characters no longer get hyphens inserted at line breaks - Advance table eliminates 30+ second stalls during CJK section indexing for paragraphs with >512 unique codepoints Closes #930 Co-authored-by: Zach Nelson <zach@zdnelson.com> Co-authored-by: Justin <itsthisjustin@users.noreply.github.com> Co-authored-by: jpirnay <jens@pirnay.com> Co-authored-by: mcrosson <kemonine@kemonine.info>
37 lines
1.9 KiB
C
37 lines
1.9 KiB
C
// The contents of this file are generated by ./lib/EpdFont/scripts/build-font-ids.sh
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#pragma once
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#define NOTOSERIF_12_FONT_ID (85340443)
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#define NOTOSERIF_14_FONT_ID (-1367885987)
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#define NOTOSERIF_16_FONT_ID (1428909134)
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#define NOTOSERIF_18_FONT_ID (-501438527)
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#define NOTOSANS_12_FONT_ID (2057568286)
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#define NOTOSANS_14_FONT_ID (-1589315735)
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#define NOTOSANS_16_FONT_ID (1669013660)
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#define NOTOSANS_18_FONT_ID (37077304)
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#define OPENDYSLEXIC_8_FONT_ID (-853313197)
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#define OPENDYSLEXIC_10_FONT_ID (963754926)
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#define OPENDYSLEXIC_12_FONT_ID (858950283)
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#define OPENDYSLEXIC_14_FONT_ID (1877344218)
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#define UI_10_FONT_ID (22918846)
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#define UI_12_FONT_ID (1635686837)
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#define SMALL_FONT_ID (674098198)
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// Font ID 0 is reserved as the "not found" sentinel.
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// Guard against any hash accidentally producing 0.
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static_assert(NOTOSERIF_12_FONT_ID != 0, "Font ID collision with sentinel");
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static_assert(NOTOSERIF_14_FONT_ID != 0, "Font ID collision with sentinel");
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static_assert(NOTOSERIF_16_FONT_ID != 0, "Font ID collision with sentinel");
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static_assert(NOTOSERIF_18_FONT_ID != 0, "Font ID collision with sentinel");
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static_assert(NOTOSANS_12_FONT_ID != 0, "Font ID collision with sentinel");
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static_assert(NOTOSANS_14_FONT_ID != 0, "Font ID collision with sentinel");
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static_assert(NOTOSANS_16_FONT_ID != 0, "Font ID collision with sentinel");
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static_assert(NOTOSANS_18_FONT_ID != 0, "Font ID collision with sentinel");
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static_assert(OPENDYSLEXIC_8_FONT_ID != 0, "Font ID collision with sentinel");
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static_assert(OPENDYSLEXIC_10_FONT_ID != 0, "Font ID collision with sentinel");
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static_assert(OPENDYSLEXIC_12_FONT_ID != 0, "Font ID collision with sentinel");
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static_assert(OPENDYSLEXIC_14_FONT_ID != 0, "Font ID collision with sentinel");
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static_assert(UI_10_FONT_ID != 0, "Font ID collision with sentinel");
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static_assert(UI_12_FONT_ID != 0, "Font ID collision with sentinel");
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static_assert(SMALL_FONT_ID != 0, "Font ID collision with sentinel");
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