Initial vendor packages

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

vendor/gif/tests/check_testimages.rs

@@ -0,0 +1,170 @@
+extern crate gif;
+extern crate glob;
+
+use std::collections::HashMap;
+use std::fs::File;
+use std::path::PathBuf;
+
+use std::io::BufReader;
+use std::io::prelude::*;
+
+const BASE_PATH: [&'static str; 2] = [".", "tests"];
+
+fn process_images<F>(func: F)
+where F: Fn(PathBuf) -> Result<u32, gif::DecodingError> {
+    let base: PathBuf = BASE_PATH.iter().collect();
+    let test_suites = &["samples"];
+    let mut results = HashMap::new();
+    let mut expected_failures = 0;
+    for suite in test_suites {
+        let mut path = base.clone();
+        path.push(suite);
+        path.push("*.gif");
+        let pattern = &*format!("{}", path.display());
+        for path in glob::glob(pattern).unwrap().filter_map(Result::ok) {
+            print!("{}: ", path.to_string_lossy());
+            match func(path.clone()) {
+                Ok(crc) => {
+                    results.insert(path, format!("{}", crc));
+                    println!("{}", crc)
+                },
+                Err(_) if path.file_name().unwrap().to_str().unwrap().starts_with("x") => {
+                    expected_failures += 1;
+                    println!("Expected failure")
+                },   
+                err => panic!("{:?}", err)
+            }
+        }
+    }
+    let mut path = base.clone();
+    path.push("results.txt");
+    let mut ref_results = HashMap::new();
+    let mut failures = 0;
+    for line in BufReader::new(File::open(path).unwrap()).lines() {
+        let line = line.unwrap();
+        let parts: Vec<_> = line.split(": ").collect();
+        if parts[1] == "Expected failure" {
+            failures += 1;
+        } else {
+            ref_results.insert(PathBuf::from(parts[0]), parts[1].to_string());
+        }
+    }
+    assert_eq!(expected_failures, failures);
+    for (path, crc) in results.iter() {
+        assert_eq!(
+            ref_results.get(path).expect(&format!("reference for {:?} is missing", path)), 
+            crc
+        )
+    }
+}
+
+#[test]
+fn render_images() {
+    process_images(|path| {
+        let mut decoder = gif::DecodeOptions::new();
+        decoder.set_color_output(gif::ColorOutput::RGBA);
+        let file = File::open(path)?;
+        let mut decoder = decoder.read_info(file)?;
+        let mut crc = Crc32::new();
+        while let Some(frame) = decoder.read_next_frame()? {
+            // First sanity check:
+            assert_eq!(
+                frame.buffer.len(), 
+                frame.width as usize
+                * frame.height as usize
+                * 4
+            );
+            crc.update(&*frame.buffer);
+        }
+        Ok(crc.checksum())
+    })
+}
+
+
+const CRC_TABLE: [u32; 256] = [
+    0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
+    0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
+    0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
+    0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
+    0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
+    0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
+    0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
+    0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
+    0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
+    0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
+    0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
+    0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
+    0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
+    0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
+    0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
+    0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
+    0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
+    0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
+    0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
+    0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
+    0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
+    0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
+    0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
+    0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
+    0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
+    0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
+    0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
+    0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
+    0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
+    0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
+    0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
+    0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
+    0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
+    0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
+    0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
+    0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
+    0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
+    0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
+    0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
+    0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
+    0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
+    0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
+    0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
+    0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
+    0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
+    0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
+    0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
+    0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
+    0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
+    0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
+    0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
+    0x2d02ef8d
+];
+
+/// Crc-32 checksum calculation
+#[derive(Debug)]
+pub struct Crc32 {
+    crc: u32,
+}
+
+impl Crc32 {
+    /// Create a new hasher.
+    pub fn new() -> Crc32 {
+        Crc32 {crc: 0xFFFFFFFF}
+    }
+    
+    /// Resets the hasher.
+    pub fn reset(&mut self) {
+        *self = Self::new()
+    }
+
+    /// Update the internal hasher with the bytes from ```buf```
+    pub fn update(&mut self, buf: &[u8]) {
+        for &byte in buf {
+            let a = (self.crc ^ byte as u32) & 0xFF;
+            let b = self.crc >> 8;
+
+            self.crc = CRC_TABLE[a as usize] ^ b;
+        }
+    }
+
+    /// Return the computed hash.
+    pub fn checksum(&self) -> u32 {
+        self.crc ^ 0xFFFFFFFF
+    }
+}

vendor/gif/tests/crashtest.rs

@@ -0,0 +1,28 @@
+use std::{fs, io};
+use gif::DecodeOptions;
+
+#[test]
+fn try_decode_crash_regression() {
+    let files = fs::read_dir(concat!(env!("CARGO_MANIFEST_DIR"), "/tests/crashtest")).unwrap();
+    let options = DecodeOptions::new();
+
+    for entry in files {
+        let entry = entry.unwrap();
+        if let Some(ext) = entry.path().extension() {
+            if ext.to_str() != Some("gif") {
+                panic!("Unexpected file {} in crashtests, should end with .gif", entry.path().display());
+            }
+        } else {
+            panic!("Unexpected file {} in crashtests, should end with .gif", entry.path().display());
+        }
+
+        let file_data = fs::read(entry.path()).unwrap();
+        let _ = try_decode_file(&options, file_data);
+    }
+}
+
+fn try_decode_file(options: &DecodeOptions, data: Vec<u8>) -> Result<(), gif::DecodingError> {
+    let mut reader = options.clone().read_info(io::Cursor::new(data))?;
+    while reader.read_next_frame()?.is_some() {}
+    Ok(())
+}

vendor/gif/tests/decode.rs

@@ -0,0 +1,84 @@
+use gif::{DecodeOptions, DisposalMethod, Encoder, Frame};
+
+#[test]
+fn frame_consistency_is_configurable() {
+    let image = create_image_with_oob_frames();
+
+    {
+        let options = DecodeOptions::new();
+        let mut data = image.as_slice();
+        let mut decoder = options.clone().read_info(&mut data).unwrap();
+        assert!(decoder.read_next_frame().is_ok());
+        assert!(decoder.read_next_frame().is_ok());
+    }
+
+    {
+        let mut options = DecodeOptions::new();
+        options.check_frame_consistency(true);
+        let mut data = image.as_slice();
+        let mut decoder = options.clone().read_info(&mut data).unwrap();
+        assert!(decoder.read_next_frame().is_ok());
+        assert!(decoder.read_next_frame().is_err());
+    }
+
+    {
+        let mut options = DecodeOptions::new();
+        options.check_frame_consistency(false);
+        let mut data = image.as_slice();
+        let mut decoder = options.clone().read_info(&mut data).unwrap();
+        assert!(decoder.read_next_frame().is_ok());
+        assert!(decoder.read_next_frame().is_ok());
+    }
+}
+
+fn create_image_with_oob_frames() -> Vec<u8> {
+    let mut data = vec![];
+    let mut encoder = Encoder::new(&mut data, 2, 2, &[0, 0, 0]).unwrap();
+
+    let mut frame = Frame {
+        delay: 1,
+        dispose: DisposalMethod::Any,
+        transparent: None,
+        needs_user_input: false,
+        top: 0,
+        left: 0,
+        width: 2,
+        height: 2,
+        interlaced: false,
+        palette: None,
+        buffer: vec![0, 0, 0, 0].into(),
+    };
+
+    encoder.write_frame(&frame).unwrap();
+    frame.top = 1;
+    frame.left = 1;
+    encoder.write_frame(&frame).unwrap();
+
+    drop(encoder);
+    data
+}
+
+#[test]
+fn check_for_end_code_is_configurable() {
+    // In this particular image, the image data of the 62nd frame has no end code.
+    let image: &[u8] = include_bytes!(concat!(env!("CARGO_MANIFEST_DIR"), "/tests/samples/gifplayer-muybridge.gif"));
+
+    {
+        let options = DecodeOptions::new();
+        let mut decoder = options.clone().read_info(&image[..]).unwrap();
+        for _ in 0..61 {
+            assert!(decoder.read_next_frame().is_ok());
+        }
+        assert!(decoder.read_next_frame().is_ok());
+    }
+
+    {
+        let mut options = DecodeOptions::new();
+        options.check_lzw_end_code(true);
+        let mut decoder = options.clone().read_info(&image[..]).unwrap();
+        for _ in 0..61 {
+            assert!(decoder.read_next_frame().is_ok());
+        }
+        assert!(decoder.read_next_frame().is_err());
+    }
+}

vendor/gif/tests/results.txt

@@ -0,0 +1,10 @@
+tests/samples/alpha_gif_a.gif: 3871893825
+tests/samples/anim-gr.gif: 291646878
+tests/samples/beacon.gif: 2462153529
+tests/samples/interlaced.gif: 2115495372
+tests/samples/moon_impact.gif: 2438689726
+tests/samples/sample_1.gif: 3275424619
+tests/samples/2x2.gif: 3802149240
+tests/samples/sample_big.gif: 4184562096
+tests/samples/gifplayer-muybridge.gif: 4267078865
+tests/samples/set_hsts.gif: 224161812

vendor/gif/tests/roundtrip.rs

@@ -0,0 +1,103 @@
+use gif::{ColorOutput, Decoder, Encoder, Frame};
+
+#[test]
+fn encode_roundtrip() {
+    const ORIGINAL: &'static [u8] = include_bytes!(concat!(env!("CARGO_MANIFEST_DIR"), "/tests/samples/2x2.gif"));
+    round_trip_from_image(ORIGINAL);
+}
+
+fn round_trip_from_image(original: &[u8]) {
+    let (width, height, global_palette);
+    let frames: Vec<Frame> = {
+        let mut decoder = Decoder::new(original).unwrap();
+        width = decoder.width();
+        height = decoder.height();
+        global_palette = decoder
+            .global_palette()
+            .unwrap_or_default()
+            .to_vec();
+        core::iter::from_fn(move || {
+            decoder.read_next_frame().unwrap().cloned()
+        }).collect()
+    };
+
+    let mut encoder = Encoder::new(vec![], width, height, &global_palette).unwrap();
+    for frame in &frames {
+        encoder.write_frame(frame).unwrap();
+    }
+    let buffer = encoder.into_inner().unwrap();
+
+    {
+        let mut decoder = Decoder::new(&buffer[..]).expect("Invalid info encoded");
+        assert_eq!(decoder.width(), width);
+        assert_eq!(decoder.height(), height);
+        assert_eq!(global_palette, decoder.global_palette().unwrap_or_default());
+        let new_frames: Vec<_> = core::iter::from_fn(move || {
+            decoder.read_next_frame().unwrap().cloned()
+        }).collect();
+        assert_eq!(new_frames.len(), frames.len(), "Diverging number of frames");
+        for (new, reference) in new_frames.iter().zip(&frames) {
+            assert_eq!(new.delay, reference.delay);
+            assert_eq!(new.dispose, reference.dispose);
+            assert_eq!(new.transparent, reference.transparent);
+            assert_eq!(new.needs_user_input, reference.needs_user_input);
+            assert_eq!(new.top, reference.top);
+            assert_eq!(new.left, reference.left);
+            assert_eq!(new.width, reference.width);
+            assert_eq!(new.height, reference.height);
+            assert_eq!(new.interlaced, reference.interlaced);
+            assert_eq!(new.palette, reference.palette);
+            assert_eq!(new.buffer, reference.buffer);
+        }
+    }
+}
+
+#[test]
+#[cfg(feature = "color_quant")]
+fn encode_roundtrip_few_colors() {
+    const WIDTH: u16 = 128;
+    const HEIGHT: u16 = 128;
+
+    // Build an image with a single red pixel, that NeuQuant won't
+    // sample, in order to check that we do appropriatelyq specialise the
+    // few-colors case.
+    let mut pixels: Vec<u8> = vec![255; WIDTH as usize * HEIGHT as usize * 4];
+    // Top-left pixel is always sampled, so use the second pixel.
+    pixels[5] = 0;
+    pixels[6] = 0;
+    // Set speed to 30 to handily avoid sampling that one pixel.
+    //
+    // We clone "pixels", since the parameter is replaced with a
+    // paletted version, and later we want to compare the output with
+    // the original RGBA image.
+    let mut frame = Frame::from_rgba_speed(WIDTH, HEIGHT, &mut pixels.clone(), 30);
+
+    let mut buffer = vec![];
+    {
+        let mut encoder = Encoder::new(&mut buffer, WIDTH, HEIGHT, &[]).unwrap();
+        encoder.write_frame(&frame).unwrap();
+
+        frame.make_lzw_pre_encoded();
+        encoder.write_lzw_pre_encoded_frame(&frame).unwrap();
+    }
+
+    {
+        let mut decoder = {
+            let mut builder = Decoder::<&[u8]>::build();
+            builder.set_color_output(ColorOutput::RGBA);
+            builder.read_info(&buffer[..]).expect("Invalid info encoded")
+        };
+
+        // Only check key fields, assuming "round_trip_from_image"
+        // covers the rest. We are primarily concerned with quantisation.
+        assert_eq!(decoder.width(), WIDTH);
+        assert_eq!(decoder.height(), HEIGHT);
+        let new_frames: Vec<_> = core::iter::from_fn(move || {
+            decoder.read_next_frame().unwrap().cloned()
+        }).collect();
+        assert_eq!(new_frames.len(), 2, "Diverging number of frames");
+        // NB: reference.buffer can't be used as it contains the palette version.
+        assert_eq!(new_frames[0].buffer, pixels);
+        assert_eq!(new_frames[1].buffer, pixels);
+    }
+}

vendor/gif/tests/stall.rs

@@ -0,0 +1,42 @@
+use std::{fs, sync::mpsc, thread, time::Duration};
+
+#[test]
+fn try_decode_crash_regression() {
+    let files = fs::read_dir(concat!(env!("CARGO_MANIFEST_DIR"), "/tests/stall")).unwrap();
+
+    for entry in files {
+        let entry = entry.unwrap();
+        if let Some(ext) = entry.path().extension() {
+            if ext.to_str() != Some("gif") {
+                panic!("Unexpected file {} in crashtests, should end with .gif", entry.path().display());
+            }
+        } else {
+            panic!("Unexpected file {} in crashtests, should end with .gif", entry.path().display());
+        }
+
+        let file_data = fs::read(entry.path()).unwrap();
+        let _ = decode_on_timer(file_data);
+    }
+}
+
+fn decode_on_timer(data: Vec<u8>) {
+    let (send, recv) = mpsc::channel();
+
+    thread::spawn(move || {
+        let result = decode(&data);
+        send.send(result).expect("still waiting");
+    });
+
+    let _ = recv.recv_timeout(Duration::from_secs(1))
+        .expect("any result");
+}
+
+fn decode(data: &[u8]) -> Result<(), gif::DecodingError> {
+    let mut options = gif::DecodeOptions::new();
+    options.set_color_output(gif::ColorOutput::RGBA);
+
+    let mut decoder = options.read_info(data)?;
+    while let Some(_frame) = decoder.read_next_frame()? {}
+
+    Ok(())
+}