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读PNG textual info，用于替代exiftool -Comment -s3。 #image #png
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| #![feature(file_buffered)] | |
| use clap::Parser; | |
| use serde::Serialize; | |
| use std::fs::File; | |
| use std::path::{Path, PathBuf}; | |
| #[derive(Parser)] | |
| struct Args { | |
| path: PathBuf, | |
| } | |
| fn main() -> anyhow::Result<()> { | |
| let args = Args::parse(); | |
| let info = read_png_textual_info(&args.path)?; | |
| let json = serde_json::to_string(&info).unwrap(); | |
| println!("{}", json); | |
| Ok(()) | |
| } | |
| #[derive(Serialize)] | |
| struct TextualEntry { | |
| keyword: String, | |
| text: String, | |
| } | |
| fn read_png_textual_info(path: impl AsRef<Path>) -> anyhow::Result<Vec<TextualEntry>> { | |
| let mut entries = Vec::new(); | |
| let png = png::Decoder::new(File::open_buffered(path)?); | |
| let reader = png.read_info()?; | |
| let info = reader.info(); | |
| for x in info.uncompressed_latin1_text.clone() { | |
| entries.push(TextualEntry { | |
| keyword: x.keyword, | |
| text: x.text, | |
| }); | |
| } | |
| for x in &info.utf8_text { | |
| entries.push(TextualEntry { | |
| keyword: x.keyword.clone(), | |
| text: x.get_text()?.clone(), | |
| }); | |
| } | |
| Ok(entries) | |
| } |
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