45 lines
1.5 KiB
Rust
45 lines
1.5 KiB
Rust
//! Exports each GIF frame as a separate image.
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use std::env;
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use std::fs::File;
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use std::path::PathBuf;
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fn main() -> Result<(), Box<dyn std::error::Error>> {
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let input_path = PathBuf::from(
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env::args_os()
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.nth(1)
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.ok_or("Specify a GIF path as the first argument")?,
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);
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let input = File::open(&input_path)?;
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let mut options = gif::DecodeOptions::new();
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options.set_color_output(gif::ColorOutput::Indexed);
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let mut decoder = options.read_info(input)?;
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let screen_width = decoder.width();
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let screen_height = decoder.height();
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let global_pal = decoder.global_palette().unwrap_or_default().to_vec();
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let output_file_stem = input_path.file_stem().unwrap().to_str().unwrap();
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let mut frame_number = 1;
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while let Some(frame) = decoder.read_next_frame()? {
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let output_path = format!("{}.{:03}.gif", output_file_stem, frame_number);
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let mut output = File::create(&output_path)?;
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let mut encoder = gif::Encoder::new(&mut output, screen_width, screen_height, &global_pal)?;
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encoder.write_frame(&frame)?;
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frame_number += 1;
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use gif::DisposalMethod::*;
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let disposal = match frame.dispose {
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Any => "any",
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Keep => "keep",
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Background => "background",
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Previous => "previous",
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};
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eprintln!(
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"Written {} ({}x{}@{}x{} delay={} {})",
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output_path, frame.width, frame.height, frame.top, frame.left, frame.delay, disposal
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);
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}
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Ok(())
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}
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