Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

1 files changed, 44 insertions, 0 deletions

diff --git a/vendor/gif/examples/explode.rs b/vendor/gif/examples/explode.rs
new file mode 100644
index 0000000..caa3c34
--- /dev/null
+++ b/vendor/gif/examples/explode.rs
@@ -0,0 +1,44 @@
+//! Exports each GIF frame as a separate image.
+
+use std::env;
+use std::fs::File;
+use std::path::PathBuf;
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let input_path = PathBuf::from(
+        env::args_os()
+            .nth(1)
+            .ok_or("Specify a GIF path as the first argument")?,
+    );
+
+    let input = File::open(&input_path)?;
+    let mut options = gif::DecodeOptions::new();
+    options.set_color_output(gif::ColorOutput::Indexed);
+    let mut decoder = options.read_info(input)?;
+    let screen_width = decoder.width();
+    let screen_height = decoder.height();
+    let global_pal = decoder.global_palette().unwrap_or_default().to_vec();
+
+    let output_file_stem = input_path.file_stem().unwrap().to_str().unwrap();
+    let mut frame_number = 1;
+    while let Some(frame) = decoder.read_next_frame()? {
+        let output_path = format!("{}.{:03}.gif", output_file_stem, frame_number);
+        let mut output = File::create(&output_path)?;
+        let mut encoder = gif::Encoder::new(&mut output, screen_width, screen_height, &global_pal)?;
+        encoder.write_frame(&frame)?;
+        frame_number += 1;
+
+        use gif::DisposalMethod::*;
+        let disposal = match frame.dispose {
+            Any => "any",
+            Keep => "keep",
+            Background => "background",
+            Previous => "previous",
+        };
+        eprintln!(
+            "Written {} ({}x{}@{}x{} delay={} {})",
+            output_path, frame.width, frame.height, frame.top, frame.left, frame.delay, disposal
+        );
+    }
+    Ok(())
+}