42 lines
1.1 KiB
Rust
42 lines
1.1 KiB
Rust
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use std::{env, fs, process};
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fn main() {
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let file = env::args().nth(1)
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.unwrap_or_else(|| explain_usage());
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let file = fs::File::open(&file)
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.expect("failed to open input file");
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let mut reader = {
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let mut options = gif::DecodeOptions::new();
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options.allow_unknown_blocks(true);
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options.read_info(file).unwrap()
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};
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loop {
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let frame = match reader.read_next_frame() {
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Ok(Some(frame)) => frame,
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Ok(None) => break,
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Err(error) => {
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println!("Error: {:?}", error);
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break;
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}
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};
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println!(
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" Frame:\n \
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delay: {:?}\n \
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canvas: {}x{}+{}+{}\n \
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dispose: {:?}\n \
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needs_input: {:?}",
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frame.delay,
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frame.width, frame.height, frame.left, frame.top,
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frame.dispose,
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frame.needs_user_input
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);
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}
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}
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fn explain_usage() -> ! {
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println!("Print information on the frames of a gif.\n\nUsage: check <file>");
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process::exit(1)
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}
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