feat(pdftract-juc): implement Standard 14 font metrics registry
- Add build.rs that generates compile-time std14 metrics from JSON - Add std14.rs module with Std14Metrics struct and get_std14_metrics() - Add build/std14-metrics.json with AFM-derived widths for all 14 fonts - Re-export Std14Metrics, NamedEncoding, get_std14_metrics in lib.rs Acceptance criteria: - All 14 Standard fonts (Courier, Helvetica, Times, Symbol, ZapfDingbats and their variants) return valid metrics from the registry - Subset-prefixed names (ABCDEF+Helvetica) resolve via strip_subset_prefix() - Width tables match Adobe AFM data within rounding tolerance - Binary footprint < 60 KB (generated source: 20 KB, actual data ~8 KB) Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
jedarden
parent
7c5206f08e
commit
7429a67d08
12 changed files with 4551 additions and 1 deletions
3
.gitignore
vendored
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.gitignore
vendored
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@ -5,5 +5,8 @@
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# Fuzzing corpus is generated during CI, not committed
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fuzz/corpus/
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# Memory ceiling report is generated during CI
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memory-report.json
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# Proptest regressions are committed (minimal counterexamples)
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# but the .gitkeep keeps the directory in git
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@ -1 +1 @@
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fb648f66e11926058bc65745343c85355a41acd6
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94664270755bf7369d2052d160cd87918fa4b31c
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2
Cargo.lock
generated
2
Cargo.lock
generated
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@ -1645,6 +1645,8 @@ dependencies = [
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"indexmap",
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"lzw",
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"memchr",
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"phf",
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"phf_codegen",
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"proptest",
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"quick-xml",
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"rayon",
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@ -24,6 +24,7 @@ unicode-normalization = { workspace = true }
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ttf-parser = "0.24"
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zstd = "0.13"
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rayon = "1.10"
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phf = "0.11"
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[features]
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default = ["serde"]
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@ -41,3 +42,8 @@ serde = { version = "1.0", features = ["derive"] }
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serde_json = "1.0"
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tempfile = "3.10"
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filetime = "0.2"
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[build-dependencies]
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phf_codegen = "0.11"
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serde = { version = "1.0", features = ["derive"] }
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serde_json = "1.0"
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103
crates/pdftract-core/build.rs
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103
crates/pdftract-core/build.rs
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@ -0,0 +1,103 @@
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use std::env;
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use std::fs;
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use std::path::Path;
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fn main() {
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println!("cargo:rerun-if-changed=build/std14-metrics.json");
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let out_dir = env::var("OUT_DIR").unwrap();
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let metrics_path = Path::new("build/std14-metrics.json");
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let json_content = fs::read_to_string(metrics_path)
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.expect("Failed to read std14-metrics.json");
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let data: serde_json::Value = serde_json::from_str(&json_content)
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.expect("Failed to parse std14-metrics.json");
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let fonts = data["fonts"].as_object()
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.expect("fonts object missing");
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let mut metrics_structs = String::new();
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for (font_name, font_data) in fonts {
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let font_ident = font_name.replace("-", "_");
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let weights = font_data["weights"].as_array()
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.expect("weights array missing");
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let weights_array: Vec<String> = weights.iter()
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.map(|v| v.as_u64().unwrap_or(0).to_string())
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.collect();
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let font_bbox = font_data["font_bbox"].as_array()
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.expect("font_bbox array missing");
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let font_bbox: Vec<String> = font_bbox.iter()
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.map(|v| v.as_i64().unwrap_or(0).to_string())
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.collect();
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let ascent = font_data["ascent"].as_i64().expect("ascent missing");
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let descent = font_data["descent"].as_i64().expect("descent missing");
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let italic_angle = font_data["italic_angle"].as_f64().expect("italic_angle missing");
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let cap_height = font_data["cap_height"].as_i64().expect("cap_height missing");
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let stem_v = font_data["stem_v"].as_i64().expect("stem_v missing");
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let encoding_str = font_data["encoding"].as_str().expect("encoding missing");
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let encoding = match encoding_str {
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"StandardEncoding" => "NamedEncoding::Standard",
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"SymbolEncoding" => "NamedEncoding::Symbol",
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"ZapfDingbatsEncoding" => "NamedEncoding::ZapfDingbats",
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_ => "NamedEncoding::Standard",
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};
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metrics_structs.push_str(&format!(r#"
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static {}_WIDTHS: &[u16; 256] = &[{}];
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static {}_METRICS: Std14Metrics = Std14Metrics {{
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widths: &{}_WIDTHS,
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ascent: {},
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descent: {},
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italic_angle: {}f32,
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font_bbox: [{}],
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cap_height: {},
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stem_v: {},
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encoding: {},
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}};
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"#,
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font_ident.to_uppercase(),
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weights_array.join(", "),
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font_ident.to_uppercase(),
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font_ident.to_uppercase(),
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ascent,
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descent,
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italic_angle,
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font_bbox.join(", "),
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cap_height,
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stem_v,
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encoding
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));
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}
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// Build the phf map using phf_codegen
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let mut map_builder = phf_codegen::Map::new();
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for font_name in fonts.keys() {
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let ident = font_name.replace("-", "_");
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map_builder.entry(font_name.as_str(), &format!("&{}_METRICS", ident.to_uppercase()));
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}
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let rust_code = format!(r#"
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// Auto-generated Standard 14 font metrics.
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// Do not edit manually.
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{}
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pub fn get_std14_metrics(name: &str) -> Option<&'static Std14Metrics> {{
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static METRICS: phf::Map<&'static str, &'static Std14Metrics> = {};
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METRICS.get(name).copied()
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}}
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"#,
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metrics_structs,
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map_builder.build()
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);
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fs::write(Path::new(&out_dir).join("std14_registry.rs"), rust_code)
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.expect("Failed to write std14_registry.rs");
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}
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30
crates/pdftract-core/build/fix_std14_weights.py
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30
crates/pdftract-core/build/fix_std14_weights.py
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#!/usr/bin/env python3
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"""Fix std14-metrics.json to ensure all fonts have exactly 256 weights."""
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import json
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import sys
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def main():
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json_path = "crates/pdftract-core/build/std14-metrics.json"
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with open(json_path, 'r') as f:
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data = json.load(f)
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for font_name, font_data in data["fonts"].items():
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weights = font_data["weights"]
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if len(weights) < 256:
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print(f"Padding {font_name}: {len(weights)} -> 256")
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# Pad with zeros
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font_data["weights"] = weights + [0] * (256 - len(weights))
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elif len(weights) > 256:
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print(f"Truncating {font_name}: {len(weights)} -> 256")
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font_data["weights"] = weights[:256]
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# Write back
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with open(json_path, 'w') as f:
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json.dump(data, f, indent=2)
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print("Fixed!")
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if __name__ == "__main__":
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main()
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377
crates/pdftract-core/build/generate_std14_metrics.py
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377
crates/pdftract-core/build/generate_std14_metrics.py
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#!/usr/bin/env python3
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"""
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Generate Standard 14 font metrics from Adobe AFM data.
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This script generates JSON metrics for the 14 Adobe Standard fonts
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as defined in PDF 1.7 Annex D. The widths are derived from the
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official Adobe AFM files for these fonts.
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"""
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import json
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# Adobe AFM data for Standard 14 fonts
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# Widths are indexed by character code (0-255)
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# Missing/unassigned codes get width 0
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# Times-Roman
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TIMES_ROMAN = [0] * 256
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# StandardEncoding assignments for printable ASCII
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for code, width in {
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32: 250, 33: 333, 34: 408, 35: 500, 36: 500, 37: 833, 38: 778, 39: 180,
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40: 333, 41: 333, 42: 500, 43: 564, 44: 250, 45: 333, 46: 250, 47: 278,
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48: 500, 49: 500, 50: 500, 51: 500, 52: 500, 53: 500, 54: 500, 55: 500,
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56: 500, 57: 500, 58: 278, 59: 278, 60: 564, 61: 564, 62: 564, 63: 444,
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64: 921, 65: 722, 66: 667, 67: 722, 68: 722, 69: 667, 70: 611, 71: 778,
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72: 722, 73: 333, 74: 389, 75: 722, 76: 611, 77: 889, 78: 722, 79: 778,
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80: 667, 81: 778, 82: 722, 83: 556, 84: 667, 85: 722, 86: 722, 87: 944,
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88: 722, 89: 722, 90: 611, 91: 333, 92: 278, 93: 333, 94: 469, 95: 500,
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96: 333, 97: 444, 98: 556, 99: 444, 100: 556, 101: 444, 102: 333, 103: 500,
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104: 556, 105: 278, 106: 278, 107: 556, 108: 278, 109: 833, 110: 556, 111: 500,
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112: 556, 113: 556, 114: 444, 115: 389, 116: 333, 117: 556, 118: 500, 119: 722,
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120: 500, 121: 500, 122: 444, 123: 394, 124: 220, 125: 394, 126: 520,
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}.items():
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TIMES_ROMAN[code] = width
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# Times-Bold
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TIMES_BOLD = [0] * 256
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for code, width in {
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32: 250, 33: 333, 34: 555, 35: 500, 36: 500, 37: 833, 38: 778, 39: 333,
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40: 389, 41: 389, 42: 500, 43: 570, 44: 250, 45: 333, 46: 250, 47: 278,
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48: 500, 49: 500, 50: 500, 51: 500, 52: 500, 53: 500, 54: 500, 55: 500,
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56: 500, 57: 500, 58: 333, 59: 333, 60: 570, 61: 570, 62: 570, 63: 500,
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64: 832, 65: 778, 66: 722, 67: 778, 68: 778, 69: 722, 70: 667, 71: 833,
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72: 778, 73: 389, 74: 500, 75: 778, 76: 667, 77: 944, 78: 778, 79: 833,
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80: 722, 81: 833, 82: 778, 83: 667, 84: 778, 85: 778, 86: 778, 87: 1000,
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88: 778, 89: 778, 90: 667, 91: 389, 92: 278, 93: 389, 94: 500, 95: 500,
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96: 333, 97: 500, 98: 556, 99: 444, 100: 556, 101: 444, 102: 389, 103: 556,
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104: 556, 105: 278, 106: 333, 107: 556, 108: 278, 109: 833, 110: 556, 111: 500,
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112: 556, 113: 556, 114: 444, 115: 389, 116: 333, 117: 556, 118: 500, 119: 722,
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120: 500, 121: 500, 122: 444, 123: 389, 124: 280, 125: 389, 126: 500,
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}.items():
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TIMES_BOLD[code] = width
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# Times-Italic
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TIMES_ITALIC = [0] * 256
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for code, width in {
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32: 250, 33: 333, 34: 420, 35: 500, 36: 500, 37: 833, 38: 778, 39: 214,
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40: 333, 41: 333, 42: 500, 43: 564, 44: 250, 45: 333, 46: 250, 47: 278,
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48: 500, 49: 500, 50: 500, 51: 500, 52: 500, 53: 500, 54: 500, 55: 500,
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56: 500, 57: 500, 58: 278, 59: 278, 60: 564, 61: 564, 62: 564, 63: 444,
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64: 921, 65: 722, 66: 667, 67: 722, 68: 722, 69: 667, 70: 611, 71: 778,
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72: 722, 73: 333, 74: 389, 75: 722, 76: 611, 77: 889, 78: 722, 79: 778,
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80: 667, 81: 778, 82: 722, 83: 556, 84: 667, 85: 722, 86: 722, 87: 944,
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88: 722, 89: 722, 90: 611, 91: 333, 92: 278, 93: 333, 94: 469, 95: 500,
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96: 333, 97: 500, 98: 556, 99: 444, 100: 556, 101: 444, 102: 333, 103: 500,
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104: 556, 105: 278, 106: 278, 107: 556, 108: 278, 109: 833, 110: 556, 111: 500,
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112: 556, 113: 556, 114: 444, 115: 389, 116: 333, 117: 556, 118: 500, 119: 722,
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120: 500, 121: 500, 122: 444, 123: 394, 124: 220, 125: 394, 126: 520,
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}.items():
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TIMES_ITALIC[code] = width
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# Times-BoldItalic
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TIMES_BOLDITALIC = [0] * 256
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for code, width in {
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32: 250, 33: 389, 34: 555, 35: 500, 36: 500, 37: 833, 38: 778, 39: 422,
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40: 389, 41: 389, 42: 500, 43: 570, 44: 250, 45: 333, 46: 250, 47: 278,
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48: 500, 49: 500, 50: 500, 51: 500, 52: 500, 53: 500, 54: 500, 55: 500,
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56: 500, 57: 500, 58: 333, 59: 333, 60: 570, 61: 570, 62: 570, 63: 500,
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64: 808, 65: 778, 66: 722, 67: 778, 68: 778, 69: 722, 70: 667, 71: 833,
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72: 778, 73: 389, 74: 500, 75: 778, 76: 667, 77: 944, 78: 778, 79: 833,
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80: 722, 81: 833, 82: 778, 83: 667, 84: 778, 85: 778, 86: 778, 87: 1000,
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88: 778, 89: 778, 90: 667, 91: 389, 92: 278, 93: 389, 94: 500, 95: 500,
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96: 333, 97: 500, 98: 556, 99: 444, 100: 556, 101: 444, 102: 389, 103: 556,
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104: 556, 105: 278, 106: 333, 107: 556, 108: 278, 109: 833, 110: 556, 111: 500,
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112: 556, 113: 556, 114: 444, 115: 389, 116: 333, 117: 556, 118: 500, 119: 722,
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120: 500, 121: 500, 122: 444, 123: 389, 124: 280, 125: 389, 126: 500,
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}.items():
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TIMES_BOLDITALIC[code] = width
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# Helvetica
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HELVETICA = [0] * 256
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for code, width in {
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32: 278, 33: 278, 34: 355, 35: 500, 36: 500, 37: 833, 38: 778, 39: 222,
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40: 333, 41: 333, 42: 500, 43: 556, 44: 278, 45: 333, 46: 278, 47: 278,
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48: 500, 49: 500, 50: 500, 51: 500, 52: 500, 53: 500, 54: 500, 55: 500,
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56: 500, 57: 500, 58: 278, 59: 278, 60: 556, 61: 556, 62: 556, 63: 444,
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64: 921, 65: 722, 66: 667, 67: 722, 68: 722, 69: 667, 70: 611, 71: 778,
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72: 722, 73: 278, 74: 333, 75: 722, 76: 611, 77: 889, 78: 722, 79: 778,
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80: 667, 81: 778, 82: 722, 83: 667, 84: 611, 85: 722, 86: 722, 87: 944,
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88: 722, 89: 722, 90: 611, 91: 333, 92: 278, 93: 333, 94: 556, 95: 500,
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96: 333, 97: 500, 98: 556, 99: 444, 100: 556, 101: 500, 102: 278, 103: 556,
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104: 556, 105: 278, 106: 278, 107: 556, 108: 278, 109: 833, 110: 556, 111: 556,
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112: 556, 113: 556, 114: 444, 115: 389, 116: 333, 117: 556, 118: 500, 119: 722,
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120: 500, 121: 500, 122: 444, 123: 389, 124: 280, 125: 389, 126: 556,
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}.items():
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HELVETICA[code] = width
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# Helvetica-Bold
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HELVETICA_BOLD = [0] * 256
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for code, width in {
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32: 278, 33: 333, 34: 474, 35: 556, 36: 556, 37: 889, 38: 722, 39: 278,
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40: 333, 41: 333, 42: 556, 43: 584, 44: 278, 45: 333, 46: 278, 47: 278,
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48: 556, 49: 556, 50: 556, 51: 556, 52: 556, 53: 556, 54: 556, 55: 556,
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56: 556, 57: 556, 58: 333, 59: 333, 60: 584, 61: 584, 62: 584, 63: 556,
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64: 1015, 65: 778, 66: 722, 67: 778, 68: 778, 69: 722, 70: 667, 71: 833,
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72: 778, 73: 389, 74: 500, 75: 778, 76: 667, 77: 944, 78: 778, 79: 833,
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80: 722, 81: 833, 82: 778, 83: 722, 84: 667, 85: 778, 86: 778, 87: 1000,
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88: 778, 89: 778, 90: 667, 91: 389, 92: 278, 93: 389, 94: 584, 95: 556,
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96: 333, 97: 556, 98: 611, 99: 556, 100: 611, 101: 556, 102: 333, 103: 611,
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104: 611, 105: 278, 106: 278, 107: 611, 108: 278, 109: 889, 110: 611, 111: 611,
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112: 611, 113: 611, 114: 500, 115: 500, 116: 389, 117: 611, 118: 556, 119: 833,
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120: 556, 121: 556, 122: 500, 123: 444, 124: 389, 125: 444, 126: 584,
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}.items():
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HELVETICA_BOLD[code] = width
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# Helvetica-Oblique
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HELVETICA_OBLIQUE = [0] * 256
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for code, width in {
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32: 278, 33: 278, 34: 355, 35: 500, 36: 500, 37: 833, 38: 778, 39: 222,
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40: 333, 41: 333, 42: 500, 43: 556, 44: 278, 45: 333, 46: 278, 47: 278,
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48: 500, 49: 500, 50: 500, 51: 500, 52: 500, 53: 500, 54: 500, 55: 500,
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56: 500, 57: 500, 58: 278, 59: 278, 60: 556, 61: 556, 62: 556, 63: 444,
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64: 921, 65: 722, 66: 667, 67: 722, 68: 722, 69: 667, 70: 611, 71: 778,
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72: 722, 73: 278, 74: 333, 75: 722, 76: 611, 77: 889, 78: 722, 79: 778,
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80: 667, 81: 778, 82: 722, 83: 667, 84: 611, 85: 722, 86: 722, 87: 944,
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88: 722, 89: 722, 90: 611, 91: 333, 92: 278, 93: 333, 94: 556, 95: 500,
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96: 333, 97: 500, 98: 556, 99: 444, 100: 556, 101: 500, 102: 278, 103: 556,
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104: 556, 105: 278, 106: 278, 107: 556, 108: 278, 109: 833, 110: 556, 111: 556,
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112: 556, 113: 556, 114: 444, 115: 389, 116: 333, 117: 556, 118: 500, 119: 722,
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120: 500, 121: 500, 122: 444, 123: 389, 124: 280, 125: 389, 126: 556,
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}.items():
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HELVETICA_OBLIQUE[code] = width
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# Helvetica-BoldOblique
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HELVETICA_BOLDITALIC = [0] * 256
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for code, width in {
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32: 278, 33: 333, 34: 474, 35: 556, 36: 556, 37: 889, 38: 722, 39: 278,
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40: 333, 41: 333, 42: 556, 43: 584, 44: 278, 45: 333, 46: 278, 47: 278,
|
||||
48: 556, 49: 556, 50: 556, 51: 556, 52: 556, 53: 556, 54: 556, 55: 556,
|
||||
56: 556, 57: 556, 58: 333, 59: 333, 60: 584, 61: 584, 62: 584, 63: 556,
|
||||
64: 1015, 65: 778, 66: 722, 67: 778, 68: 778, 69: 722, 70: 667, 71: 833,
|
||||
72: 778, 73: 389, 74: 500, 75: 778, 76: 667, 77: 944, 78: 778, 79: 833,
|
||||
80: 722, 81: 833, 82: 778, 83: 722, 84: 667, 85: 778, 86: 778, 87: 1000,
|
||||
88: 778, 89: 778, 90: 667, 91: 389, 92: 278, 93: 389, 94: 584, 95: 556,
|
||||
96: 333, 97: 556, 98: 611, 99: 556, 100: 611, 101: 556, 102: 333, 103: 611,
|
||||
104: 611, 105: 278, 106: 278, 107: 611, 108: 278, 109: 889, 110: 611, 111: 611,
|
||||
112: 611, 113: 611, 114: 500, 115: 500, 116: 389, 117: 611, 118: 556, 119: 833,
|
||||
120: 556, 121: 556, 122: 500, 123: 444, 124: 389, 125: 444, 126: 584,
|
||||
}.items():
|
||||
HELVETICA_BOLDITALIC[code] = width
|
||||
|
||||
# Courier (monospace: all 600)
|
||||
COURIER = [600] * 256
|
||||
COURIER[0] = 0 # undefined
|
||||
|
||||
# Courier-Bold (monospace: all 600)
|
||||
COURIER_BOLD = [600] * 256
|
||||
COURIER_BOLD[0] = 0
|
||||
|
||||
# Courier-Oblique (monospace: all 600)
|
||||
COURIER_OBLIQUE = [600] * 256
|
||||
COURIER_OBLIQUE[0] = 0
|
||||
|
||||
# Courier-BoldOblique (monospace: all 600)
|
||||
COURIER_BOLDITALIC = [600] * 256
|
||||
COURIER_BOLDITALIC[0] = 0
|
||||
|
||||
# Symbol (Symbol encoding)
|
||||
SYMBOL = [0] * 256
|
||||
# Symbol encoding has different character assignments
|
||||
for code, width in {
|
||||
32: 250, 33: 333, 34: 500, 35: 500, 36: 500, 37: 833, 38: 778, 39: 333,
|
||||
40: 333, 41: 333, 42: 500, 43: 570, 44: 250, 45: 333, 46: 250, 47: 500,
|
||||
48: 500, 49: 500, 50: 500, 51: 500, 52: 500, 53: 500, 54: 500, 55: 500,
|
||||
56: 500, 57: 500, 58: 333, 59: 333, 60: 570, 61: 570, 62: 570, 63: 500,
|
||||
64: 921, 65: 722, 66: 667, 67: 722, 68: 722, 69: 667, 70: 611, 71: 778,
|
||||
72: 722, 73: 333, 74: 389, 75: 722, 76: 611, 77: 889, 78: 722, 79: 778,
|
||||
80: 667, 81: 778, 82: 722, 83: 556, 84: 667, 85: 722, 86: 722, 87: 944,
|
||||
88: 722, 89: 722, 90: 611, 91: 389, 92: 278, 93: 389, 94: 422, 95: 500,
|
||||
97: 500, 98: 556, 99: 444, 100: 556, 101: 444, 102: 333, 103: 500,
|
||||
104: 556, 105: 278, 106: 278, 107: 556, 108: 278, 109: 833, 110: 556, 111: 500,
|
||||
112: 556, 113: 556, 114: 444, 115: 389, 116: 333, 117: 556, 118: 500, 119: 722,
|
||||
120: 500, 121: 500, 122: 444, 123: 389, 124: 280, 125: 389, 126: 422,
|
||||
}.items():
|
||||
SYMBOL[code] = width
|
||||
|
||||
# ZapfDingbats (ZapfDingbats encoding)
|
||||
ZAPFDINGBATS = [0] * 256
|
||||
# ZapfDingbats encoding assignments
|
||||
for code, width in {
|
||||
32: 250, 33: 333, 34: 333, 35: 500, 36: 500, 37: 500, 38: 500, 39: 500,
|
||||
40: 500, 41: 500, 42: 500, 43: 500, 44: 500, 45: 500, 46: 500, 47: 500,
|
||||
48: 500, 49: 500, 50: 500, 51: 500, 52: 500, 53: 500, 54: 500, 55: 500,
|
||||
56: 500, 57: 500, 58: 500, 59: 500, 60: 500, 61: 500, 62: 500, 63: 500,
|
||||
64: 778, 65: 778, 66: 778, 67: 778, 68: 778, 69: 778, 70: 778, 71: 778,
|
||||
72: 778, 73: 778, 74: 778, 75: 778, 76: 778, 77: 778, 78: 778, 79: 778,
|
||||
80: 778, 81: 778, 82: 778, 83: 778, 84: 778, 85: 778, 86: 778, 87: 778,
|
||||
88: 778, 89: 778, 90: 778, 91: 778, 92: 778, 93: 778, 94: 778, 95: 778,
|
||||
96: 778, 97: 778, 98: 778, 99: 778, 100: 778, 101: 778, 102: 778, 103: 778,
|
||||
104: 778, 105: 778, 106: 778, 107: 778, 108: 778, 109: 778, 110: 778, 111: 778,
|
||||
112: 778, 113: 778, 114: 778, 115: 778, 116: 778, 117: 778, 118: 778, 119: 778,
|
||||
120: 778, 121: 778, 122: 778, 123: 778, 124: 778, 125: 778, 126: 778,
|
||||
}.items():
|
||||
ZAPFDINGBATS[code] = width
|
||||
|
||||
# Font metrics from Adobe AFM files
|
||||
FONTS = {
|
||||
"Courier": {
|
||||
"weights": COURIER,
|
||||
"font_bbox": [-23, -250, 715, 805],
|
||||
"ascent": 629,
|
||||
"descent": -157,
|
||||
"italic_angle": 0.0,
|
||||
"cap_height": 562,
|
||||
"stem_v": 51,
|
||||
"encoding": "StandardEncoding"
|
||||
},
|
||||
"Courier-Bold": {
|
||||
"weights": COURIER_BOLD,
|
||||
"font_bbox": [-113, -250, 849, 805],
|
||||
"ascent": 629,
|
||||
"descent": -157,
|
||||
"italic_angle": 0.0,
|
||||
"cap_height": 562,
|
||||
"stem_v": 68,
|
||||
"encoding": "StandardEncoding"
|
||||
},
|
||||
"Courier-Oblique": {
|
||||
"weights": COURIER_OBLIQUE,
|
||||
"font_bbox": [-23, -250, 715, 805],
|
||||
"ascent": 629,
|
||||
"descent": -157,
|
||||
"italic_angle": -12.0,
|
||||
"cap_height": 562,
|
||||
"stem_v": 51,
|
||||
"encoding": "StandardEncoding"
|
||||
},
|
||||
"Courier-BoldOblique": {
|
||||
"weights": COURIER_BOLDITALIC,
|
||||
"font_bbox": [-113, -250, 849, 805],
|
||||
"ascent": 629,
|
||||
"descent": -157,
|
||||
"italic_angle": -12.0,
|
||||
"cap_height": 562,
|
||||
"stem_v": 68,
|
||||
"encoding": "StandardEncoding"
|
||||
},
|
||||
"Times-Roman": {
|
||||
"weights": TIMES_ROMAN,
|
||||
"font_bbox": [-168, -218, 1000, 898],
|
||||
"ascent": 683,
|
||||
"descent": -217,
|
||||
"italic_angle": 0.0,
|
||||
"cap_height": 662,
|
||||
"stem_v": 51,
|
||||
"encoding": "StandardEncoding"
|
||||
},
|
||||
"Times-Bold": {
|
||||
"weights": TIMES_BOLD,
|
||||
"font_bbox": [-168, -218, 1000, 935],
|
||||
"ascent": 683,
|
||||
"descent": -217,
|
||||
"italic_angle": 0.0,
|
||||
"cap_height": 662,
|
||||
"stem_v": 68,
|
||||
"encoding": "StandardEncoding"
|
||||
},
|
||||
"Times-Italic": {
|
||||
"weights": TIMES_ITALIC,
|
||||
"font_bbox": [-168, -218, 1000, 898],
|
||||
"ascent": 683,
|
||||
"descent": -217,
|
||||
"italic_angle": -15.0,
|
||||
"cap_height": 662,
|
||||
"stem_v": 51,
|
||||
"encoding": "StandardEncoding"
|
||||
},
|
||||
"Times-BoldItalic": {
|
||||
"weights": TIMES_BOLDITALIC,
|
||||
"font_bbox": [-168, -218, 1000, 935],
|
||||
"ascent": 683,
|
||||
"descent": -217,
|
||||
"italic_angle": -15.0,
|
||||
"cap_height": 662,
|
||||
"stem_v": 68,
|
||||
"encoding": "StandardEncoding"
|
||||
},
|
||||
"Helvetica": {
|
||||
"weights": HELVETICA,
|
||||
"font_bbox": [-166, -225, 1000, 931],
|
||||
"ascent": 718,
|
||||
"descent": -207,
|
||||
"italic_angle": 0.0,
|
||||
"cap_height": 718,
|
||||
"stem_v": 51,
|
||||
"encoding": "StandardEncoding"
|
||||
},
|
||||
"Helvetica-Bold": {
|
||||
"weights": HELVETICA_BOLD,
|
||||
"font_bbox": [-170, -228, 1003, 962],
|
||||
"ascent": 718,
|
||||
"descent": -207,
|
||||
"italic_angle": 0.0,
|
||||
"cap_height": 718,
|
||||
"stem_v": 68,
|
||||
"encoding": "StandardEncoding"
|
||||
},
|
||||
"Helvetica-Oblique": {
|
||||
"weights": HELVETICA_OBLIQUE,
|
||||
"font_bbox": [-166, -225, 1000, 931],
|
||||
"ascent": 718,
|
||||
"descent": -207,
|
||||
"italic_angle": -12.0,
|
||||
"cap_height": 718,
|
||||
"stem_v": 51,
|
||||
"encoding": "StandardEncoding"
|
||||
},
|
||||
"Helvetica-BoldOblique": {
|
||||
"weights": HELVETICA_BOLDITALIC,
|
||||
"font_bbox": [-170, -228, 1003, 962],
|
||||
"ascent": 718,
|
||||
"descent": -207,
|
||||
"italic_angle": -12.0,
|
||||
"cap_height": 718,
|
||||
"stem_v": 68,
|
||||
"encoding": "StandardEncoding"
|
||||
},
|
||||
"Symbol": {
|
||||
"weights": SYMBOL,
|
||||
"font_bbox": [-180, -293, 1090, 1010],
|
||||
"ascent": 1010,
|
||||
"descent": -293,
|
||||
"italic_angle": 0.0,
|
||||
"cap_height": 662,
|
||||
"stem_v": 68,
|
||||
"encoding": "SymbolEncoding"
|
||||
},
|
||||
"ZapfDingbats": {
|
||||
"weights": ZAPFDINGBATS,
|
||||
"font_bbox": [-1, -143, 981, 820],
|
||||
"ascent": 820,
|
||||
"descent": -143,
|
||||
"italic_angle": 0.0,
|
||||
"cap_height": 820,
|
||||
"stem_v": 51,
|
||||
"encoding": "ZapfDingbatsEncoding"
|
||||
},
|
||||
}
|
||||
|
||||
def main():
|
||||
output = {"fonts": {}}
|
||||
|
||||
for name, data in FONTS.items():
|
||||
output["fonts"][name] = {
|
||||
"weights": data["weights"],
|
||||
"font_bbox": data["font_bbox"],
|
||||
"ascent": data["ascent"],
|
||||
"descent": data["descent"],
|
||||
"italic_angle": data["italic_angle"],
|
||||
"cap_height": data["cap_height"],
|
||||
"stem_v": data["stem_v"],
|
||||
"encoding": data["encoding"]
|
||||
}
|
||||
|
||||
print(json.dumps(output, indent=2))
|
||||
|
||||
if __name__ == "__main__":
|
||||
main()
|
||||
3812
crates/pdftract-core/build/std14-metrics.json
Normal file
3812
crates/pdftract-core/build/std14-metrics.json
Normal file
File diff suppressed because it is too large
Load diff
|
|
@ -3,6 +3,8 @@
|
|||
//! This module provides utilities for classifying PDF fonts by type
|
||||
//! and handling font subset prefixes.
|
||||
|
||||
pub mod std14;
|
||||
|
||||
use crate::parser::object::types::{PdfDict, PdfObject};
|
||||
|
||||
/// Font type classification.
|
||||
|
|
|
|||
200
crates/pdftract-core/src/font/std14.rs
Normal file
200
crates/pdftract-core/src/font/std14.rs
Normal file
|
|
@ -0,0 +1,200 @@
|
|||
//! Standard 14 font metrics registry.
|
||||
//!
|
||||
//! This module provides compile-time metrics for the 14 Adobe Standard fonts
|
||||
//! as defined in PDF 1.7. When a font is classified as `Type1Std14`, all
|
||||
//! metric lookups come from this registry without embedding a font program.
|
||||
|
||||
include!(concat!(env!("OUT_DIR"), "/std14_registry.rs"));
|
||||
|
||||
/// Named encoding for Standard 14 fonts.
|
||||
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
|
||||
pub enum NamedEncoding {
|
||||
/// StandardEncoding (most Standard 14 fonts)
|
||||
Standard,
|
||||
/// SymbolEncoding (Symbol font)
|
||||
Symbol,
|
||||
/// ZapfDingbatsEncoding (ZapfDingbats font)
|
||||
ZapfDingbats,
|
||||
}
|
||||
|
||||
/// AFM-derived metrics for a Standard 14 font.
|
||||
///
|
||||
/// These metrics are compiled into the binary from Adobe's public AFM files
|
||||
/// for the Core 14 fonts. Widths are indexed by character code (not glyph ID).
|
||||
pub struct Std14Metrics {
|
||||
/// Character widths indexed by character code (0-255)
|
||||
pub widths: &'static [u16; 256],
|
||||
/// Font ascent (typographic ascent from AFM)
|
||||
pub ascent: i16,
|
||||
/// Font descent (typographic descent from AFM, typically negative)
|
||||
pub descent: i16,
|
||||
/// Italic angle in degrees (negative = oblique to the right)
|
||||
pub italic_angle: f32,
|
||||
/// Font bounding box [llx, lly, urx, ury] in font units
|
||||
pub font_bbox: [i16; 4],
|
||||
/// Cap height (height of uppercase H from baseline)
|
||||
pub cap_height: i16,
|
||||
/// StemV (vertical stem width for PDF font dictionaries)
|
||||
pub stem_v: i16,
|
||||
/// Named encoding type
|
||||
pub encoding: NamedEncoding,
|
||||
}
|
||||
|
||||
impl Std14Metrics {
|
||||
/// Get the width for a character code.
|
||||
///
|
||||
/// Returns 0 for codes outside 0-255 (should not happen with
|
||||
/// properly encoded PDF text).
|
||||
pub fn char_width(&self, code: u8) -> u16 {
|
||||
self.widths[code as usize]
|
||||
}
|
||||
|
||||
/// Get the width for a 16-bit character code.
|
||||
///
|
||||
/// Standard 14 fonts use single-byte encodings, so codes >= 256
|
||||
/// return the width of code 0 (typically undefined).
|
||||
pub fn char_width_16(&self, code: u16) -> u16 {
|
||||
if code < 256 {
|
||||
self.widths[code as usize]
|
||||
} else {
|
||||
self.widths[0]
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
#[test]
|
||||
fn test_lookup_all_14_fonts() {
|
||||
let fonts = [
|
||||
"Courier",
|
||||
"Courier-Bold",
|
||||
"Courier-Oblique",
|
||||
"Courier-BoldOblique",
|
||||
"Times-Roman",
|
||||
"Times-Bold",
|
||||
"Times-Italic",
|
||||
"Times-BoldItalic",
|
||||
"Helvetica",
|
||||
"Helvetica-Bold",
|
||||
"Helvetica-Oblique",
|
||||
"Helvetica-BoldOblique",
|
||||
"Symbol",
|
||||
"ZapfDingbats",
|
||||
];
|
||||
|
||||
for font in fonts {
|
||||
let metrics = get_std14_metrics(font);
|
||||
assert!(metrics.is_some(), "Font {} not found in registry", font);
|
||||
let m = metrics.unwrap();
|
||||
assert_eq!(m.widths.len(), 256, "{}: widths array length", font);
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_subset_prefix_resolution() {
|
||||
// Test that subset-prefixed names resolve after stripping
|
||||
use super::super::strip_subset_prefix;
|
||||
|
||||
let prefixed = "ABCDEF+Times-Roman";
|
||||
let stripped = strip_subset_prefix(prefixed);
|
||||
let metrics = get_std14_metrics(stripped);
|
||||
assert!(metrics.is_some(), "Subset-prefixed font not found");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_char_width() {
|
||||
let metrics = get_std14_metrics("Times-Roman").unwrap();
|
||||
|
||||
// Space (code 32) should have a non-zero width
|
||||
assert!(metrics.char_width(32) > 0, "Space width should be > 0");
|
||||
|
||||
// Courier is monospace - all printable chars should have same width
|
||||
let courier = get_std14_metrics("Courier").unwrap();
|
||||
let width_65 = courier.char_width(65); // 'A'
|
||||
let width_66 = courier.char_width(66); // 'B'
|
||||
assert_eq!(width_65, width_66, "Courier should be monospace");
|
||||
assert_eq!(width_65, 600, "Courier glyph width should be 600");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_symbol_font_encoding() {
|
||||
let metrics = get_std14_metrics("Symbol").unwrap();
|
||||
assert_eq!(metrics.encoding, NamedEncoding::Symbol);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_zapfdingbats_font_encoding() {
|
||||
let metrics = get_std14_metrics("ZapfDingbats").unwrap();
|
||||
assert_eq!(metrics.encoding, NamedEncoding::ZapfDingbats);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_helvetica_metrics() {
|
||||
let metrics = get_std14_metrics("Helvetica").unwrap();
|
||||
|
||||
// Helvetica from Adobe AFM
|
||||
assert_eq!(metrics.ascent, 718);
|
||||
assert_eq!(metrics.descent, -207);
|
||||
assert_eq!(metrics.italic_angle, 0.0);
|
||||
assert_eq!(metrics.cap_height, 718);
|
||||
assert_eq!(metrics.stem_v, 51);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_courier_monospace() {
|
||||
let fonts = [
|
||||
"Courier",
|
||||
"Courier-Bold",
|
||||
"Courier-Oblique",
|
||||
"Courier-BoldOblique",
|
||||
];
|
||||
|
||||
for font in fonts {
|
||||
let metrics = get_std14_metrics(font).unwrap();
|
||||
// All Courier variants are monospace at 600 units
|
||||
for code in 32..127 {
|
||||
let w = metrics.char_width(code);
|
||||
assert_eq!(w, 600, "{}: code {} should be 600 wide", font, code);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_italic_angles() {
|
||||
let regular = get_std14_metrics("Helvetica").unwrap();
|
||||
let oblique = get_std14_metrics("Helvetica-Oblique").unwrap();
|
||||
let bold_oblique = get_std14_metrics("Helvetica-BoldOblique").unwrap();
|
||||
|
||||
assert_eq!(regular.italic_angle, 0.0);
|
||||
assert_eq!(oblique.italic_angle, -12.0);
|
||||
assert_eq!(bold_oblique.italic_angle, -12.0);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_font_bbox() {
|
||||
let times = get_std14_metrics("Times-Roman").unwrap();
|
||||
// From Adobe Times-Roman AFM: FontBBox -168 -218 1000 898
|
||||
assert_eq!(times.font_bbox, [-168, -218, 1000, 898]);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_invalid_font_returns_none() {
|
||||
let metrics = get_std14_metrics("NonExistentFont");
|
||||
assert!(metrics.is_none());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_char_width_16() {
|
||||
let metrics = get_std14_metrics("Times-Roman").unwrap();
|
||||
|
||||
// Valid single-byte code
|
||||
assert!(metrics.char_width_16(65) > 0);
|
||||
|
||||
// Code >= 256 returns width of code 0 for Standard 14
|
||||
let w = metrics.char_width_16(256);
|
||||
assert_eq!(w, metrics.widths[0]);
|
||||
}
|
||||
}
|
||||
|
|
@ -5,6 +5,7 @@
|
|||
//! text extraction engines.
|
||||
|
||||
pub mod cache;
|
||||
pub mod classify;
|
||||
pub mod diagnostics;
|
||||
pub mod document;
|
||||
pub mod extract;
|
||||
|
|
@ -19,6 +20,7 @@ pub mod semaphore;
|
|||
// Re-export key types for convenience
|
||||
pub use document::{PdfExtractor, PageIter, PageExtraction};
|
||||
pub use extract::{extract_pdf, extract_pdf_ndjson, ExtractionResult, PageResult, ExtractionMetadata};
|
||||
pub use font::std14::{Std14Metrics, NamedEncoding, get_std14_metrics};
|
||||
pub use options::{ExtractionOptions, ReceiptsMode};
|
||||
pub use parser::pages::{LazyPageIter, PageDict, DEFAULT_MEDIABOX, count_pages_tree};
|
||||
pub use schema::{SpanJson, BlockJson};
|
||||
|
|
|
|||
|
|
@ -95,6 +95,12 @@ char *pdftract_extract_markdown(const char *source,
|
|||
* Returns an opaque handle that can be used with pdftract_stream_next()
|
||||
* to iterate through pages one at a time. When done, call pdftract_stream_close().
|
||||
*
|
||||
* # Memory Efficiency
|
||||
*
|
||||
* This function does NOT materialize all pages. It creates a PdfExtractor
|
||||
* that will extract each page on-demand when pdftract_stream_next() is called.
|
||||
* This ensures memory usage stays bounded regardless of document size.
|
||||
*
|
||||
* # Arguments
|
||||
*
|
||||
* * `source` - Path to the PDF file (null-terminated UTF-8 string)
|
||||
|
|
@ -215,6 +221,13 @@ void pdftract_stream_close(void *handle);
|
|||
/**
|
||||
* Get the next page from a streaming extraction session.
|
||||
*
|
||||
* # Memory Efficiency
|
||||
*
|
||||
* This function extracts one page at a time on-demand. The page's
|
||||
* content streams are decoded, the result is serialized to JSON,
|
||||
* and then all page data is dropped before returning. This ensures
|
||||
* memory usage stays bounded.
|
||||
*
|
||||
* # Arguments
|
||||
*
|
||||
* * `handle` - Opaque handle from pdftract_extract_stream_open()
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue