hcie-rust-v3.05/hcie-io/examples/dump_lfx2.rs

fn main() {
    for path_str in [
        "_images/_psd_stil_test/hc_drop_shadow.psd",
        "_images/_psd_stil_test/fx_drop_shadow.psd",
    ] {
        println!("\n========================================\nFILE: {}", path_str);
        let path = std::path::Path::new(path_str);
        let bytes = std::fs::read(path).unwrap();
        let mut r = hcie_psd::psd_reader::PsdReader::new(&bytes);
        
        r.read(26).unwrap();
        let color_mode_len = r.read_u32().unwrap() as usize;
        r.read(color_mode_len).unwrap();
        let img_res_len = r.read_u32().unwrap() as usize;
        r.read(img_res_len).unwrap();
        let _layer_mask_len_val = r.read_u32().unwrap() as usize;
        let _layer_info_len = r.read_u32().unwrap() as usize;
        let layer_count_raw = r.read_i16().unwrap();
        let layer_count = layer_count_raw.abs() as usize;
        
        for _idx in 0..layer_count {
            let _top = r.read_i32().unwrap();
            let _left = r.read_i32().unwrap();
            let _bottom = r.read_i32().unwrap();
            let _right = r.read_i32().unwrap();
            let channel_count = r.read_u16().unwrap() as usize;
            for _ in 0..channel_count {
                let _id = r.read_i16().unwrap();
                let _len = r.read_u32().unwrap();
            }
            r.read(4).unwrap(); r.read(4).unwrap(); r.read_u8().unwrap(); r.read_u8().unwrap(); r.read_u8().unwrap(); r.read(1).unwrap();
            
            let extra_data_len = r.read_u32().unwrap() as usize;
            let extra_start = r.pos();
            
            let layer_mask_len = r.read_u32().unwrap() as usize;
            r.read(layer_mask_len).unwrap();
            let blending_ranges_len = r.read_u32().unwrap() as usize;
            r.read(blending_ranges_len).unwrap();
            
            let name_len = r.read_u8().unwrap() as usize;
            let name_bytes = r.read(name_len).unwrap();
            let name = String::from_utf8_lossy(name_bytes).to_string();
            let bytes_mod_4 = (name_len + 1) % 4;
            let padding = (4 - bytes_mod_4) % 4;
            r.read(padding).unwrap();
            
            while r.pos() < extra_start + extra_data_len {
                let sig = r.read(4).unwrap();
                if sig != b"8BIM" && sig != b"8B64" { break; }
                let key_bytes = r.read(4).unwrap();
                let key = String::from_utf8_lossy(key_bytes).to_string();
                let block_len = r.read_u32().unwrap() as usize;
                let block_start = r.pos();
                
                if key == "lfx2" {
                    let data = r.read(block_len).unwrap().to_vec();
                    println!("Layer '{}' lfx2 block: {} bytes", name, data.len());
                    
                    // Try different offsets to parse top-level descriptor
                    for offset in [0, 4, 8, 10, 14, 16] {
                        if let Some((entries, _)) = hcie_fx::parser::parse_descriptor_body(&data, offset) {
                            if !entries.is_empty() {
                                println!("  Parsed at offset {} with {} entries", offset, entries.len());
                                dump_entries(&entries, 2);
                            }
                        }
                    }
                } else {
                    r.read(block_len).unwrap();
                }
                r.seek(block_start + block_len).unwrap();
                if block_len % 2 != 0 { r.read(1).unwrap(); }
            }
            r.seek(extra_start + extra_data_len).unwrap();
        }
    }
}

fn dump_entries(entries: &[( [u8; 4], hcie_fx::parser::DescValue)], depth: usize) {
    let indent = "  ".repeat(depth);
    for (k, v) in entries {
        let key_str = String::from_utf8_lossy(k).to_string();
        match v {
            hcie_fx::parser::DescValue::Bool(b) => println!("{}{}: bool = {}", indent, key_str, b),
            hcie_fx::parser::DescValue::Long(l) => println!("{}{}: long = {}", indent, key_str, l),
            hcie_fx::parser::DescValue::Double(d) => println!("{}{}: double = {:.4}", indent, key_str, d),
            hcie_fx::parser::DescValue::UnitFloat { unit, value } => {
                println!("{}{}: unit_float({:?}) = {:.4}", indent, key_str, String::from_utf8_lossy(unit), value);
            }
            hcie_fx::parser::DescValue::Enum { class_id, value } => {
                println!("{}{}: enum({:?}) = {:?}", indent, key_str, String::from_utf8_lossy(class_id), String::from_utf8_lossy(value));
            }
            hcie_fx::parser::DescValue::Object(sub) => {
                println!("{}{}: Objc({})", indent, key_str, sub.len());
                dump_entries(sub, depth + 1);
            }
            hcie_fx::parser::DescValue::List(items) => {
                println!("{}{}: List({})", indent, key_str, items.len());
                for (i, item) in items.iter().enumerate() {
                    println!("{}  [{}]: {:?}", indent, i, std::mem::discriminant(item));
                    if let hcie_fx::parser::DescValue::Object(sub) = item {
                        dump_entries(sub, depth + 2);
                    }
                }
            }
            _ => println!("{}{}: Unknown", indent, key_str),
        }
    }
}