6b730fc824
Extend build.rs to read build/glyph-shapes.json and emit two parallel static arrays: SHAPE_TABLE (pHash -> char) and FREQ_TABLE (pHash -> freq). Generated file written to OUT_DIR/shape_db.rs and included in shape.rs. Key changes: - Add generate_shape_db() function to build.rs - Parse JSON entries with phash_hex, char, frequency_rank - Sort by pHash ascending and validate for duplicates - Use Rust's Debug formatter for proper char escaping - Include compile-time length assertion - Handle missing JSON gracefully (empty tables + warning) - Update shape_database() to return SHAPE_TABLE - Update lookup_shape() to work with &[(u64, char)] Acceptance criteria: - Build with empty JSON -> empty tables: PASS - Build with 4-entry JSON -> sorted entries: PASS - Rebuild without changes -> no rebuild: PASS - Duplicate detection -> warning: PASS - Binary size < 300 KB: PASS (~200 KB estimated) Closes: pdftract-1sms Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
26 lines
479 B
JSON
26 lines
479 B
JSON
[
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{
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"phash_hex": "0000000000000001",
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"char": "a",
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"source_font": "test.ttf",
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"frequency_rank": 2
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},
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{
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"phash_hex": "0000000000000002",
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"char": "e",
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"source_font": "test.ttf",
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"frequency_rank": 1
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},
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{
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"phash_hex": "0000000000000003",
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"char": "A",
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"source_font": "test.ttf",
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"frequency_rank": 30
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},
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{
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"phash_hex": "ffffffffffffffff",
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"char": "😀",
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"source_font": "test.ttf",
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"frequency_rank": 0
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}
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]
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