feat: Add animated GIF support

src/main.rs

@@ -17,9 +17,11 @@ use embedded_graphics::{
     text::Text,
     Drawable, Pixel,
 };
-use image::{imageops::FilterType, ImageReader};
+use image::{
+    codecs::gif::GifDecoder, imageops::FilterType, AnimationDecoder, ImageReader, Pixel as iPixel,
+};
 use serde::Deserialize;
-use std::{fs, path::PathBuf};
+use std::{fs, fs::File, io::BufReader, path::PathBuf};
 #[cfg(feature = "u8g2-fonts")]
 use u8g2_fonts::{fonts::u8g2_font_lucasfont_alternate_tf, U8g2TextStyle};
 
@@ -99,6 +101,7 @@ enum Content {
     BitmapBase64 { width: u32, bitmap_base64: String },
     BitmapFile { width: u32, bitmap_file: PathBuf },
     ImageFile { img_file: PathBuf },
+    GifFile { gif_file: PathBuf },
 }
 
 fn main() -> Result<()> {
@@ -252,6 +255,36 @@ fn generate_payload(args: &mut Args) -> Result<PayloadBuffer> {
                     }
                 }
             }
+            Content::GifFile { gif_file } => {
+                let file_in = BufReader::new(File::open(gif_file)?);
+                let frames = GifDecoder::new(file_in)?
+                    .into_frames()
+                    .collect_frames()
+                    .expect("error decoding gif");
+
+                let frame_count = frames.len();
+                let (width, height) = frames.first().unwrap().buffer().dimensions();
+                if height != 11 || width != 44 {
+                    anyhow::bail!("Expected 44x11 pixel gif file");
+                }
+
+                let mut buffer = payload.add_message(style, (48 * frame_count + 7) / 8);
+
+                for (i, frame) in frames.iter().enumerate() {
+                    let buf = frame.buffer();
+                    for y in 0..11 {
+                        for x in 0..44 {
+                            if buf.get_pixel(x, y).to_luma().0 > [31] {
+                                Pixel(
+                                    Point::new((x as usize + i * 48).try_into()?, y.try_into()?),
+                                    BinaryColor::On,
+                                )
+                                .draw(&mut buffer)?;
+                            }
+                        }
+                    }
+                }
+            }
         }
     }