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use bmp;
use dssim;
use dssim::*;
use imgref::*;
use lodepng;
use rayon::prelude::*;
use rgb;
use std::fs;
use std::io;
use std::path::{Path, PathBuf};
use std::sync::mpsc;
use std::thread;
use structopt::StructOpt;
#[derive(Debug, StructOpt)]
#[structopt(raw(setting = "structopt::clap::AppSettings::ColoredHelp"))]
pub struct Config {
#[structopt(parse(from_os_str), short = "s")]
pub src_dir: PathBuf,
#[structopt(parse(from_os_str), short = "d")]
pub dest_dir: PathBuf,
#[structopt(parse(from_os_str), short = "f")]
pub diff_dir: PathBuf,
#[structopt(short = "v", long = "verbose")]
pub verbose: bool,
}
enum ImageType {
BMP(Result<bmp::Image, bmp::BmpError>),
PNG(Result<ImgVec<RGBAPLU>, lodepng::ffi::Error>),
}
struct Image {
path: PathBuf,
image: ImageType,
}
pub fn do_diff(config: &Config) -> io::Result<()> {
let files_to_load = find_all_files_to_load(config.src_dir.clone(), &config)?;
let (transmitter, receiver) = mpsc::channel();
thread::spawn(move || {
for (scr_path, dest_path) in files_to_load {
if let Some(extension) = scr_path.extension() {
if let Some(extension) = extension.to_str() {
let extension = extension.to_lowercase();
if extension == "bmp" {
let src_img = Image {
path: scr_path.clone(),
image: ImageType::BMP(bmp::open(scr_path)),
};
let dest_img = Image {
path: dest_path.clone(),
image: ImageType::BMP(bmp::open(dest_path)),
};
if let Err(err) = transmitter.send((src_img, dest_img)) {
eprintln!("Could not send using channel: {:?}", err);
};
} else {
let src_img = Image {
path: scr_path.clone(),
image: ImageType::PNG(load(scr_path)),
};
let dest_img = Image {
path: dest_path.clone(),
image: ImageType::PNG(load(dest_path)),
};
if let Err(err) = transmitter.send((src_img, dest_img)) {
eprintln!("Could not send using channel: {:?}", err);
};
}
} else {
eprintln!("Could not convert extension to string: {:?}", extension);
}
} else {
eprintln!("Could not get extension from file: {:?}", scr_path);
}
}
});
for (src_img, dest_img) in receiver {
match src_img.image {
ImageType::BMP(src_image) => {
let dest_image = match dest_img.image {
ImageType::BMP(dest_image) => dest_image,
ImageType::PNG(_) => panic!("Mismatched image types, expected BMP got PNG"),
};
match (src_image, dest_image) {
(Ok(src_bmp_img), Ok(dest_bmp_img)) => {
let mut diff_value = 0.0; if src_bmp_img.get_width() != dest_bmp_img.get_width()
|| src_bmp_img.get_height() != dest_bmp_img.get_height()
{
diff_value = 1.0; println!("Images have different dimensions, skipping comparison");
} else {
let mut diff_image =
bmp::Image::new(src_bmp_img.get_width(), src_bmp_img.get_height());
for (x, y) in src_bmp_img.coordinates() {
let dest_pixel = dest_bmp_img.get_pixel(x, y);
let src_pixel = src_bmp_img.get_pixel(x, y);
let diff_pixel = subtract(src_pixel, dest_pixel);
diff_value += interpolate(diff_pixel);
diff_image.set_pixel(x, y, diff_pixel);
}
if let Some(path) = dest_img.path.to_str() {
let diff_file_name =
get_diff_file_name_and_validate_path(path, config);
match diff_file_name {
Some(diff_file_name) => {
let handle = thread::spawn(move || {
output_bmp(&diff_file_name, Some(diff_image))
});
if let Err(err) = handle.join() {
eprintln!("Could not join the handle: {:?}", err);
};
}
None => {
eprintln!("Could not write diff file");
}
}
} else {
eprintln!("Failed to convert {:?} to string", dest_img.path);
}
}
print_diff_result(config.verbose, &src_img.path, diff_value);
if diff_value != 0.0 && config.verbose {
if let Some(path) = src_img.path.to_str() {
eprintln!("diff found in file: {:?}", String::from(path));
} else {
eprintln!("Failed to convert {:?} to string", src_img.path);
}
}
}
(Err(err), _) => {
eprintln!("Failed to open src img {:?}", err);
}
(_, Err(err)) => {
eprintln!("Failed to open dest img {:?}", err);
}
}
}
ImageType::PNG(src_image) => {
let dest_image = match dest_img.image {
ImageType::PNG(dest_image) => dest_image,
ImageType::BMP(_) => panic!("Mismatched image types, expected PNG got BMP"),
};
match (src_image, dest_image) {
(Ok(src_png_img), Ok(dest_png_img)) => {
if src_png_img.width() != dest_png_img.width()
|| src_png_img.height() != dest_png_img.height()
{
println!("Images have different dimensions, skipping comparison");
if config.verbose {
if let Some(path) = src_img.path.to_str() {
eprintln!("diff found in file: {:?}", String::from(path));
} else {
eprintln!(
"failed to convert path to string: {:?}",
src_img.path
);
}
}
} else {
let mut attr = dssim::Dssim::new();
attr.set_save_ssim_maps(1);
match (
attr.create_image(&src_png_img),
attr.create_image(&dest_png_img),
) {
(Some(src_image), Some(dest_image)) => {
let (ssim_diff_value, ssim_maps) =
attr.compare(&src_image, dest_image);
print_diff_result(
config.verbose,
&src_img.path,
ssim_diff_value,
);
if ssim_diff_value != 0.0 {
if let Some(dest_img_path) = dest_img.path.to_str() {
let diff_file_name =
get_diff_file_name_and_validate_path(
dest_img_path,
config,
);
match diff_file_name {
Some(diff_file_name) => {
output_diff_files(&diff_file_name, &ssim_maps);
if config.verbose {
if let Some(path) = src_img.path.to_str() {
eprintln!(
"diff found in file: {:?}",
String::from(path)
);
} else {
eprintln!(
"failed to convert path to string: {:?}",
src_img.path
);
}
}
}
None => {
eprintln!("Could not output diff file");
}
}
} else {
eprintln!(
"failed to convert path to string: {:?}",
dest_img.path
);
}
}
}
(None, _) => eprintln!("Failed to load src img"),
(_, None) => eprintln!("Failed to load dest img"),
}
}
}
(Err(err), _) => eprintln!("Failed to open src img: {:?}", err),
(_, Err(err)) => eprintln!("Failed to open dest img: {:?}", err),
}
}
};
}
Ok(())
}
fn find_all_files_to_load(dir: PathBuf, config: &Config) -> io::Result<Vec<(PathBuf, PathBuf)>> {
let mut files: Vec<(PathBuf, PathBuf)> = vec![];
match fs::read_dir(dir) {
Err(err) => eprintln!("Could not read dir: {:?}", err),
Ok(entries) => {
for entry in entries {
match entry {
Err(err) => eprintln!("Error in dir entry: {:?}", err),
Ok(entry) => {
let entry = entry.path();
if entry.is_file() {
let entry_name = entry.to_str();
let scr_name = config.src_dir.to_str();
let dest_name = config.dest_dir.to_str();
match (entry_name, scr_name, dest_name) {
(Some(entry_name), Some(scr_name), Some(dest_name)) => {
let dest_file_name = entry_name.replace(scr_name, dest_name);
let dest_path = PathBuf::from(dest_file_name);
if dest_path.exists() {
files.push((entry, dest_path));
}
}
_ => {
eprint!("Failed to convert to path to string: ");
if entry_name.is_none() {
eprintln!("{:?}", entry);
}
if scr_name.is_none() {
eprintln!("{:?}", config.src_dir);
}
if dest_name.is_none() {
eprintln!("{:?}", config.dest_dir);
}
}
}
} else {
let child_files = find_all_files_to_load(entry, &config)?;
for child in child_files {
files.push(child);
}
}
}
}
}
}
}
Ok(files)
}
fn get_diff_file_name_and_validate_path(dest_file_name: &str, config: &Config) -> Option<String> {
let scr_name = config.src_dir.to_str();
let dest_name = config.dest_dir.to_str();
let diff_name = config.diff_dir.to_str();
match (dest_name, diff_name) {
(Some(dest_name), Some(diff_name)) => {
let diff_file_name = dest_file_name.replace(dest_name, diff_name);
let diff_path = Path::new(&diff_file_name);
if let Some(diff_path_dir) = diff_path.parent() {
if !diff_path_dir.exists() {
if config.verbose {
println!("creating directory: {:?}", diff_path_dir);
}
create_path(diff_path);
}
}
Some(diff_file_name)
}
_ => {
eprint!("Failed to convert to path to string: ");
if scr_name.is_none() {
eprintln!("{:?}", config.src_dir);
}
if dest_name.is_none() {
eprintln!("{:?}", config.dest_dir);
}
if diff_name.is_none() {
eprintln!("{:?}", config.diff_dir);
}
None
}
}
}
fn output_bmp(path_name: &str, image: Option<bmp::Image>) {
if let Some(image) = image {
if let Err(err) = image.save(&path_name) {
eprintln!("Failed to save diff_file: {}\nError: {}", path_name, err)
}
}
}
fn print_diff_result<T: std::fmt::Debug>(verbose: bool, entry: &PathBuf, diff_value: T) {
if verbose {
println!(
"compared file: {:?} had diff value of: {:?}",
entry, diff_value
);
} else {
println!("{:?}", diff_value);
}
}
fn interpolate(p: bmp::Pixel) -> f32 {
f32::from((p.r / 3) + (p.g / 3) + (p.b / 3)) / 10_000_000.0
}
fn subtract(p1: bmp::Pixel, p2: bmp::Pixel) -> bmp::Pixel {
let r;
let g;
let b;
if p1.r >= p2.r {
r = p1.r - p2.r;
} else {
r = p2.r - p1.r
}
if p1.g >= p2.g {
g = p1.g - p2.g;
} else {
g = p2.g - p1.g
}
if p1.b >= p2.b {
b = p1.b - p2.b;
} else {
b = p2.b - p1.b
}
bmp::Pixel { r, g, b }
}
fn create_path(path: &Path) {
let mut buffer = path.to_path_buf();
if buffer.is_file() {
buffer.pop();
}
create_dir_if_not_there(buffer);
}
fn create_dir_if_not_there(mut buffer: PathBuf) -> PathBuf {
if buffer.pop() {
let temp_buffer = buffer.clone();
create_dir_if_not_there(temp_buffer);
if !buffer.exists() && buffer != Path::new("") {
if let Err(err) = fs::create_dir(&buffer) {
eprintln!("Failed to create directory: {:?}", err);
}
}
}
buffer
}
fn to_byte(i: f32) -> u8 {
if i <= 0.0 {
0
} else if i >= 255.0 / 256.0 {
255
} else {
(i * 256.0) as u8
}
}
fn output_diff_files(path_name: &str, ssim_maps: &[SsimMap]) {
ssim_maps.par_iter().enumerate().for_each(|(n, map_meta)| {
let avgssim = map_meta.ssim as f32;
let out: Vec<_> = map_meta
.map
.pixels()
.map(|ssim| {
let max = 1_f32 - ssim;
let maxsq = max * max;
rgb::RGBA8 {
r: to_byte(maxsq * 16.0),
g: to_byte(max * 3.0),
b: to_byte(max / ((1_f32 - avgssim) * 4_f32)),
a: 255,
}
})
.collect();
let write_res = lodepng::encode32_file(
format!("{}-{}.png", path_name, n),
&out,
map_meta.map.width(),
map_meta.map.height(),
);
if write_res.is_err() {
eprintln!("Can't write {}: {:?}", path_name, write_res);
std::process::exit(1);
}
});
}
fn load<P: AsRef<Path>>(path: P) -> Result<ImgVec<RGBAPLU>, lodepng::Error> {
let image = lodepng::decode32_file(path.as_ref())?;
Ok(Img::new(
image.buffer.to_rgbaplu(),
image.width,
image.height,
))
}