Update dependency ejs to v2.7.4

We've been running each Make command in a single thread, resulting in fairly slow builds for C++ codecs.

This change instead runs all `make` invocations with `-j` defaulting to number of cores (retrieved via `nproc`).

On my machine Docker uses a VM configured to 4 cores out of 8 available. This change brings total build time for C++ codecs down from 10m28s to 7m5s (~3.5 minutes difference).

Note (1): I've converted imagequant builds to use built-in `make` as well to leverage this parallelisation and future-proof build script.
Note (2): we don't need to do the same for Rust, since Cargo parallelises builds by default.

.babelrc

@@ -1,33 +0,0 @@
-{
-	"presets": [
-		[
-			"env",
-			{
-				"loose": true,
-				"uglify": true,
-				"modules": false,
-				"targets": {
-					"browsers": "last 2 versions"
-				},
-				"exclude": [
-					"transform-regenerator",
-					"transform-es2015-typeof-symbol"
-				]
-			}
-		]
-	],
-	"plugins": [
-		"syntax-dynamic-import",
-		"transform-decorators-legacy",
-		"transform-class-properties",
-		"transform-object-rest-spread",
-		"transform-react-constant-elements",
-		"transform-react-remove-prop-types",
-		[
-			"transform-react-jsx",
-			{
-				"pragma": "h"
-			}
-		]
-	]
-}

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,36 @@
+---
+name: Bug report
+about: Something is not working as expected
+labels: 
+
+---
+
+**Before you start**
+Please take a look at the [FAQ](https://github.com/GoogleChromeLabs/squoosh/wiki/FAQ) as well as the already opened issues! If nothing fits your problem, go ahead and fill out the following template:
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Version:**
+ - OS w/ version: [e.g. iOS 12]
+ - Browser w/ version [e.g. Chrome 70]
+ - Node version: [e.g. 10.11.0]
+ - npm version: [e.g. 6.4.1]
+
+**Is your issue related to the quality of image compression?**
+Please attach original and output images (you can drag & drop to attach). 
+- Original image 
+- Output image from Squoosh
+
+**Additional context, screenshots, screencasts**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,18 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+labels: 
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Does other service/app have this feature?**
+Add any service you know/use that has this feature (We want to know for research)
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.gitignore

@@ -1,3 +1,6 @@
 node_modules
 /build
-/*.log
+/*.log
+*.scss.d.ts
+*.css.d.ts
+*.o

.nvmrc

@@ -0,0 +1 @@
+10.16.2

.travis.yml

@@ -0,0 +1,4 @@
+language: node_js
+cache: npm
+script: npm run build
+after_success: npm run sizereport

README.md

@@ -1,5 +1,31 @@
-# Squoosh!
+# [Squoosh]!
 
-Squoosh will be an image compression web app that allows you to dive into the
-advanced options provided by various image compressors.
+[Squoosh] is an image compression web app that allows you to dive into the advanced options provided
+by various image compressors.
 
+# Privacy
+
+Google Analytics is used to record the following:
+
+* [Basic visit data](https://support.google.com/analytics/answer/6004245?ref_topic=2919631).
+* Before and after image size once an image is downloaded. These values are rounded to the nearest
+  kilobyte.
+
+Image compression is handled locally; no additional data is sent to the server.
+
+# Building locally
+
+Clone the repo, and:
+
+```sh
+npm install
+npm run build
+```
+
+You can run the development server with:
+
+```sh
+npm start
+```
+
+[Squoosh]: https://squoosh.app

_headers.ejs

@@ -0,0 +1,18 @@
+# Long-term cache by default.
+/*
+  Cache-Control: max-age=31536000
+
+# And here are the exceptions:
+/
+  Cache-Control: no-cache
+
+/serviceworker.js
+  Cache-Control: no-cache
+
+/manifest.json
+  Cache-Control: must-revalidate, max-age=3600
+
+# URLs in /assets do not include a hash and are mutable.
+# But it isn't a big deal if the user gets an old version.
+/assets/*
+  Cache-Control: must-revalidate, max-age=3600

_redirects.ejs

@@ -0,0 +1,2 @@
+/index.html / 301
+/* /index.html 301

codecs/README.md

@@ -0,0 +1,16 @@
+# Codecs
+
+This folder contains a self-contained sub-project for each encoder and decoder that squoosh supplies.
+
+## Build
+
+Each subproject can be built using [Docker](https://www.docker.com/) the following commands:
+
+```
+$ npm install
+$ npm run build
+```
+
+This will build two files: `<codec name>_<enc or dec>.js` and `<codec name>_<enc or dec>.wasm`. It will most likely be necessary to set [`Module["locateFile"]`](https://kripken.github.io/emscripten-site/docs/api_reference/module.html#affecting-execution) to successfully load the `.wasm` file. When the `.js` file is loaded, a global `<codec name>_<enc or dec>` is created with the same API as an [Emscripten `Module`](https://kripken.github.io/emscripten-site/docs/api_reference/module.html).
+
+Each codec will document its API in its README.

codecs/hqx/.gitignore

@@ -0,0 +1,5 @@
+**/*.rs.bk
+target
+Cargo.lock
+bin/
+pkg/README.md

codecs/hqx/Cargo.toml

@@ -0,0 +1,37 @@
+[package]
+name = "squooshhqx"
+version = "0.1.0"
+authors = ["Surma <surma@surma.link>"]
+
+[lib]
+crate-type = ["cdylib"]
+
+[features]
+default = ["console_error_panic_hook", "wee_alloc"]
+
+[dependencies]
+cfg-if = "0.1.2"
+wasm-bindgen = "0.2.38"
+# lazy_static = "1.0.0"
+hqx = {git = "https://github.com/CryZe/wasmboy-rs", tag="v0.1.2"}
+
+# The `console_error_panic_hook` crate provides better debugging of panics by
+# logging them with `console.error`. This is great for development, but requires
+# all the `std::fmt` and `std::panicking` infrastructure, so isn't great for
+# code size when deploying.
+console_error_panic_hook = { version = "0.1.1", optional = true }
+
+# `wee_alloc` is a tiny allocator for wasm that is only ~1K in code size
+# compared to the default allocator's ~10K. It is slower than the default
+# allocator, however.
+#
+# Unfortunately, `wee_alloc` requires nightly Rust when targeting wasm for now.
+wee_alloc = { version = "0.4.2", optional = true }
+
+[dev-dependencies]
+wasm-bindgen-test = "0.2"
+
+[profile.release]
+# Tell `rustc` to optimize for small code size.
+opt-level = "s"
+lto = true

codecs/hqx/Dockerfile

@@ -0,0 +1,12 @@
+FROM rust
+RUN rustup target add wasm32-unknown-unknown
+RUN curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
+
+RUN mkdir /opt/binaryen && \
+ curl -L https://github.com/WebAssembly/binaryen/releases/download/1.38.32/binaryen-1.38.32-x86-linux.tar.gz  | tar -xzf - -C /opt/binaryen --strip 1
+
+RUN mkdir /opt/wabt && \
+ curl -L https://github.com/WebAssembly/wabt/releases/download/1.0.11/wabt-1.0.11-linux.tar.gz  | tar -xzf - -C /opt/wabt --strip 1
+
+ENV PATH="/opt/binaryen:/opt/wabt:${PATH}"
+WORKDIR /src

codecs/hqx/build.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+set -e
+
+echo "============================================="
+echo "Compiling wasm"
+echo "============================================="
+(
+  wasm-pack build
+  wasm-strip pkg/squooshhqx_bg.wasm
+  echo "Optimising Wasm so it doesn't break Chrome (this takes like 10-15mins. get a cup of tea)"
+  echo "Once https://crbug.com/974804 is fixed, we can remove this step"
+  wasm-opt -Os --no-validation -o pkg/squooshhqx_bg.wasm pkg/squooshhqx_bg.wasm
+  rm pkg/.gitignore
+)
+echo "============================================="
+echo "Compiling wasm  done"
+echo "============================================="
+
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo "Did you update your docker image?"
+echo "Run \`docker pull ubuntu\`"
+echo "Run \`docker pull rust\`"
+echo "Run \`docker build -t squoosh-hqx .\`"
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"

codecs/hqx/package-lock.json

@@ -0,0 +1,4 @@
+{
+  "name": "hqx",
+  "lockfileVersion": 1
+}

codecs/hqx/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "hqx",
+  "scripts": {
+    "build:image": "docker build -t squoosh-hqx .",
+    "build": "docker run --rm -v $(pwd):/src squoosh-hqx ./build.sh"
+  }
+}

codecs/hqx/pkg/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "squooshhqx",
+  "collaborators": [
+    "Surma <surma@surma.link>"
+  ],
+  "version": "0.1.0",
+  "files": [
+    "squooshhqx_bg.wasm",
+    "squooshhqx.js",
+    "squooshhqx.d.ts"
+  ],
+  "module": "squooshhqx.js",
+  "types": "squooshhqx.d.ts",
+  "sideEffects": "false"
+}

codecs/hqx/pkg/squooshhqx.d.ts

@@ -0,0 +1,9 @@
+/* tslint:disable */
+/**
+* @param {Uint32Array} input_image 
+* @param {number} input_width 
+* @param {number} input_height 
+* @param {number} factor 
+* @returns {Uint32Array} 
+*/
+export function resize(input_image: Uint32Array, input_width: number, input_height: number, factor: number): Uint32Array;

codecs/hqx/pkg/squooshhqx.js

@@ -0,0 +1,46 @@
+import * as wasm from './squooshhqx_bg.wasm';
+
+let cachegetUint32Memory = null;
+function getUint32Memory() {
+    if (cachegetUint32Memory === null || cachegetUint32Memory.buffer !== wasm.memory.buffer) {
+        cachegetUint32Memory = new Uint32Array(wasm.memory.buffer);
+    }
+    return cachegetUint32Memory;
+}
+
+let WASM_VECTOR_LEN = 0;
+
+function passArray32ToWasm(arg) {
+    const ptr = wasm.__wbindgen_malloc(arg.length * 4);
+    getUint32Memory().set(arg, ptr / 4);
+    WASM_VECTOR_LEN = arg.length;
+    return ptr;
+}
+
+let cachegetInt32Memory = null;
+function getInt32Memory() {
+    if (cachegetInt32Memory === null || cachegetInt32Memory.buffer !== wasm.memory.buffer) {
+        cachegetInt32Memory = new Int32Array(wasm.memory.buffer);
+    }
+    return cachegetInt32Memory;
+}
+
+function getArrayU32FromWasm(ptr, len) {
+    return getUint32Memory().subarray(ptr / 4, ptr / 4 + len);
+}
+/**
+* @param {Uint32Array} input_image
+* @param {number} input_width
+* @param {number} input_height
+* @param {number} factor
+* @returns {Uint32Array}
+*/
+export function resize(input_image, input_width, input_height, factor) {
+    const retptr = 8;
+    const ret = wasm.resize(retptr, passArray32ToWasm(input_image), WASM_VECTOR_LEN, input_width, input_height, factor);
+    const memi32 = getInt32Memory();
+    const v0 = getArrayU32FromWasm(memi32[retptr / 4 + 0], memi32[retptr / 4 + 1]).slice();
+    wasm.__wbindgen_free(memi32[retptr / 4 + 0], memi32[retptr / 4 + 1] * 4);
+    return v0;
+}
+

codecs/hqx/pkg/squooshhqx_bg.d.ts

@@ -0,0 +1,5 @@
+/* tslint:disable */
+export const memory: WebAssembly.Memory;
+export function __wbindgen_malloc(a: number): number;
+export function __wbindgen_free(a: number, b: number): void;
+export function resize(a: number, b: number, c: number, d: number, e: number, f: number): void;

codecs/hqx/src/lib.rs

@@ -0,0 +1,55 @@
+extern crate cfg_if;
+extern crate hqx;
+extern crate wasm_bindgen;
+
+mod utils;
+
+use cfg_if::cfg_if;
+use wasm_bindgen::prelude::*;
+
+cfg_if! {
+    // When the `wee_alloc` feature is enabled, use `wee_alloc` as the global
+    // allocator.
+    if #[cfg(feature = "wee_alloc")] {
+        extern crate wee_alloc;
+        #[global_allocator]
+        static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
+    }
+}
+
+#[wasm_bindgen]
+#[no_mangle]
+pub fn resize(
+    input_image: Vec<u32>,
+    input_width: usize,
+    input_height: usize,
+    factor: usize,
+) -> Vec<u32> {
+    let num_output_pixels = input_width * input_height * factor * factor;
+    let mut output_image = Vec::<u32>::with_capacity(num_output_pixels * 4);
+    output_image.resize(num_output_pixels, 0);
+
+    match factor {
+        2 => hqx::hq2x(
+            input_image.as_slice(),
+            output_image.as_mut_slice(),
+            input_width,
+            input_height,
+        ),
+        3 => hqx::hq3x(
+            input_image.as_slice(),
+            output_image.as_mut_slice(),
+            input_width,
+            input_height,
+        ),
+        4 => hqx::hq4x(
+            input_image.as_slice(),
+            output_image.as_mut_slice(),
+            input_width,
+            input_height,
+        ),
+        _ => unreachable!(),
+    };
+
+    return output_image;
+}

codecs/hqx/src/utils.rs

@@ -0,0 +1,17 @@
+use cfg_if::cfg_if;
+
+cfg_if! {
+    // When the `console_error_panic_hook` feature is enabled, we can call the
+    // `set_panic_hook` function at least once during initialization, and then
+    // we will get better error messages if our code ever panics.
+    //
+    // For more details see
+    // https://github.com/rustwasm/console_error_panic_hook#readme
+    if #[cfg(feature = "console_error_panic_hook")] {
+        extern crate console_error_panic_hook;
+        pub use self::console_error_panic_hook::set_once as set_panic_hook;
+    } else {
+        #[inline]
+        pub fn set_panic_hook() {}
+    }
+}

codecs/imagequant/README.md

@@ -0,0 +1,30 @@
+# ImageQuant
+
+- Source: <https://github.com/ImageOptim/libimagequant>
+- Version: v2.12.1
+
+## Dependencies
+
+- Docker
+
+## Example
+
+See `example.html`
+
+## API
+
+### `int version()`
+
+Returns the version of libimagequant as a number. va.b.c is encoded as 0x0a0b0c
+
+### `RawImage quantize(std::string buffer, int image_width, int image_height, int numColors, float dithering)`
+
+Quantizes the given images, using at most `numColors`, a value between 2 and 256. `dithering` is a value between 0 and 1 controlling the amount of dithering. `RawImage` is a class with 3 fields: `buffer`, `width`, and `height`.
+
+### `RawImage zx_quantize(std::string buffer, int image_width, int image_height, float dithering)`
+
+???
+
+### `void free_result()`
+
+Frees the result created by `quantize()`.

codecs/imagequant/build.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+
+set -e
+
+export OPTIMIZE="-Os"
+export LDFLAGS="${OPTIMIZE}"
+export CFLAGS="${OPTIMIZE}"
+export CPPFLAGS="${OPTIMIZE}"
+
+echo "============================================="
+echo "Compiling libimagequant"
+echo "============================================="
+(
+  cd node_modules/libimagequant
+  emconfigure ./configure --disable-sse
+  emmake make static -j`nproc`
+)
+echo "============================================="
+echo "Compiling wasm module"
+echo "============================================="
+(
+  emcc \
+    --bind \
+    ${OPTIMIZE} \
+    --closure 1 \
+    -s ALLOW_MEMORY_GROWTH=1 \
+    -s MODULARIZE=1 \
+    -s 'EXPORT_NAME="imagequant"' \
+    -I node_modules/libimagequant \
+    -o ./imagequant.js \
+    --std=c++11 \
+    -x c++ \
+    imagequant.cpp \
+    node_modules/libimagequant/libimagequant.a
+)
+echo "============================================="
+echo "Compiling wasm module done"
+echo "============================================="
+
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo "Did you update your docker image?"
+echo "Run \`docker pull trzeci/emscripten-upstream\`"
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"

codecs/imagequant/example.html

@@ -0,0 +1,41 @@
+<!doctype html>
+<style>
+  canvas {
+    image-rendering: pixelated;
+  }
+</style>
+<script src='imagequant.js'></script>
+<script>
+  const Module = imagequant();
+
+  async function loadImage(src) {
+    // Load image
+    const img = document.createElement('img');
+    img.src = src;
+    await new Promise(resolve => img.onload = resolve);
+    // Make canvas same size as image
+    const canvas = document.createElement('canvas');
+    [canvas.width, canvas.height] = [img.width, img.height];
+    // Draw image onto canvas
+    const ctx = canvas.getContext('2d');
+    ctx.drawImage(img, 0, 0);
+    return ctx.getImageData(0, 0, img.width, img.height);
+  }
+
+  Module.onRuntimeInitialized = async _ => {
+    console.log('Version:', Module.version().toString(16));
+    const image = await loadImage('../example.png');
+    // const rawImage = Module.quantize(image.data, image.width, image.height, 256, 1.0);
+    const rawImage = Module.zx_quantize(image.data, image.width, image.height, 1.0);
+    console.log('done');
+    Module.free_result();
+
+    const imageData = new ImageData(new Uint8ClampedArray(rawImage.buffer), rawImage.width, rawImage.height);
+    const canvas = document.createElement('canvas');
+    canvas.width = image.width;
+    canvas.height = image.height;
+    const ctx = canvas.getContext('2d');
+    ctx.putImageData(imageData, 0, 0);
+    document.body.appendChild(canvas);
+  };
+</script>

codecs/imagequant/imagequant.cpp

@@ -0,0 +1,245 @@
+#include "emscripten/bind.h"
+#include "emscripten/val.h"
+#include <stdlib.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <math.h>
+
+#include "libimagequant.h"
+
+using namespace emscripten;
+
+int version() {
+  return (((LIQ_VERSION/10000) % 100) << 16) |
+         (((LIQ_VERSION/100  ) % 100) << 8) |
+         (((LIQ_VERSION/1    ) % 100) << 0);
+}
+
+class RawImage {
+public:
+  val buffer;
+  int width;
+  int height;
+
+  RawImage(val b, int w, int h)
+    : buffer(b), width(w), height(h) {}
+};
+
+
+liq_attr *attr;
+liq_image *image;
+liq_result *res;
+uint8_t* result;
+RawImage quantize(std::string rawimage, int image_width, int image_height, int num_colors, float dithering) {
+  const uint8_t* image_buffer = (uint8_t*)rawimage.c_str();
+  int size = image_width * image_height;
+  attr = liq_attr_create();
+  image = liq_image_create_rgba(attr, image_buffer, image_width, image_height, 0);
+  liq_set_max_colors(attr, num_colors);
+  liq_image_quantize(image, attr, &res);
+  liq_set_dithering_level(res, dithering);
+  uint8_t* image8bit = (uint8_t*) malloc(size);
+  result = (uint8_t*) malloc(size * 4);
+  liq_write_remapped_image(res, image, image8bit, size);
+  const liq_palette *pal = liq_get_palette(res);
+  // Turn palletted image back into an RGBA image
+  for(int i = 0; i < size; i++) {
+    result[i * 4 + 0] = pal->entries[image8bit[i]].r;
+    result[i * 4 + 1] = pal->entries[image8bit[i]].g;
+    result[i * 4 + 2] = pal->entries[image8bit[i]].b;
+    result[i * 4 + 3] = pal->entries[image8bit[i]].a;
+  }
+  free(image8bit);
+  liq_result_destroy(res);
+  liq_image_destroy(image);
+  liq_attr_destroy(attr);
+  return {
+    val(typed_memory_view(image_width*image_height*4, result)),
+    image_width,
+    image_height
+  };
+}
+
+const liq_color zx_colors[] = {
+  {.r = 0, .g = 0, .b = 0, .a = 255},       // regular black
+  {.r = 0, .g = 0, .b = 215, .a = 255},     // regular blue
+  {.r = 215, .g = 0, .b = 0, .a = 255},     // regular red
+  {.r = 215, .g = 0, .b = 215, .a = 255},   // regular magenta
+  {.r = 0, .g = 215, .b = 0, .a = 255},     // regular green
+  {.r = 0, .g = 215, .b = 215, .a = 255},   // regular cyan
+  {.r = 215, .g = 215, .b = 0, .a = 255},   // regular yellow
+  {.r = 215, .g = 215, .b = 215, .a = 255}, // regular white
+  {.r = 0, .g = 0, .b = 255, .a = 255},     // bright blue
+  {.r = 255, .g = 0, .b = 0, .a = 255},     // bright red
+  {.r = 255, .g = 0, .b = 255, .a = 255},   // bright magenta
+  {.r = 0, .g = 255, .b = 0, .a = 255},     // bright green
+  {.r = 0, .g = 255, .b = 255, .a = 255},   // bright cyan
+  {.r = 255, .g = 255, .b = 0, .a = 255},   // bright yellow
+  {.r = 255, .g = 255, .b = 255, .a = 255}  // bright white
+};
+
+uint8_t block[8 * 8 * 4];
+
+/**
+ * The ZX has one bit per pixel, but can assign two colours to an 8x8 block. The two colours must
+ * both be 'regular' or 'bright'. Black exists as both regular and bright.
+ */
+RawImage zx_quantize(std::string rawimage, int image_width, int image_height, float dithering) {
+  const uint8_t* image_buffer = (uint8_t*) rawimage.c_str();
+  int size = image_width * image_height;
+  int bytes_per_pixel = 4;
+  result = (uint8_t*) malloc(size * bytes_per_pixel);
+  uint8_t* image8bit = (uint8_t*) malloc(8 * 8);
+
+  // For each 8x8 grid
+  for (int block_start_y = 0; block_start_y < image_height; block_start_y += 8) {
+    for (int block_start_x = 0; block_start_x < image_width; block_start_x += 8) {
+      int color_popularity[15] = {0};
+      int block_index = 0;
+      int block_width = 8;
+      int block_height = 8;
+
+      // If the block hangs off the right/bottom of the image dimensions, make it smaller to fit.
+      if (block_start_y + block_height > image_height) {
+        block_height = image_height - block_start_y;
+      }
+
+      if (block_start_x + block_width > image_width) {
+        block_width = image_width - block_start_x;
+      }
+
+      // For each pixel in that block:
+      for (int y = block_start_y; y < block_start_y + block_height; y++) {
+        for (int x = block_start_x; x < block_start_x + block_width; x++) {
+          int pixel_start = (y * image_width * bytes_per_pixel) + (x * bytes_per_pixel);
+          int smallest_distance = INT_MAX;
+          int winning_index = -1;
+
+          // Copy pixel data for quantizing later
+          block[block_index++] = image_buffer[pixel_start];
+          block[block_index++] = image_buffer[pixel_start + 1];
+          block[block_index++] = image_buffer[pixel_start + 2];
+          block[block_index++] = image_buffer[pixel_start + 3];
+
+          // Which zx color is this pixel closest to?
+          for (int color_index = 0; color_index < 15; color_index++) {
+            liq_color color = zx_colors[color_index];
+
+            // Using Euclidean distance. LibQuant has better methods, but it requires conversion to
+            // LAB, so I don't think it's worth it.
+            int distance =
+              pow(color.r - image_buffer[pixel_start + 0], 2) +
+              pow(color.g - image_buffer[pixel_start + 1], 2) +
+              pow(color.b - image_buffer[pixel_start + 2], 2);
+
+            if (distance < smallest_distance) {
+              winning_index = color_index;
+              smallest_distance = distance;
+            }
+          }
+          color_popularity[winning_index]++;
+        }
+      }
+
+      // Get the three most popular colours for the block.
+      int first_color_index = 0;
+      int second_color_index = 0;
+      int third_color_index = 0;
+      int highest_popularity = -1;
+      int second_highest_popularity = -1;
+      int third_highest_popularity = -1;
+
+      for (int color_index = 0; color_index < 15; color_index++) {
+        if (color_popularity[color_index] > highest_popularity) {
+          // Store this as the most popular pixel, and demote the current values:
+          third_color_index = second_color_index;
+          third_highest_popularity = second_highest_popularity;
+          second_color_index = first_color_index;
+          second_highest_popularity = highest_popularity;
+          first_color_index = color_index;
+          highest_popularity = color_popularity[color_index];
+        } else if (color_popularity[color_index] > second_highest_popularity) {
+          third_color_index = second_color_index;
+          third_highest_popularity = second_highest_popularity;
+          second_color_index = color_index;
+          second_highest_popularity = color_popularity[color_index];
+        } else if (color_popularity[color_index] > third_highest_popularity) {
+          third_color_index = color_index;
+          third_highest_popularity = color_popularity[color_index];
+        }
+      }
+
+      // ZX images can't mix bright and regular colours, except black which appears in both.
+      // Resolve any conflict:
+      while (1) {
+        // If either colour is black, there's no conflict to resolve.
+        if (first_color_index != 0 && second_color_index != 0) {
+          if (first_color_index >= 8 && second_color_index < 8) {
+            // Make the second color bright
+            second_color_index = second_color_index + 7;
+          } else if (first_color_index < 8 && second_color_index >= 8) {
+            // Make the second color regular
+            second_color_index = second_color_index - 7;
+          }
+        }
+
+        // If, during conflict resolving, we now have two of the same colour (because we initially
+        // selected the bright & regular version of the same colour), retry again with the third
+        // most popular colour.
+        if (first_color_index == second_color_index) {
+          second_color_index = third_color_index;
+        } else break;
+      }
+
+      // Quantize
+      attr = liq_attr_create();
+      image = liq_image_create_rgba(attr, block, block_width, block_height, 0);
+      liq_set_max_colors(attr, 2);
+      liq_image_add_fixed_color(image, zx_colors[first_color_index]);
+      liq_image_add_fixed_color(image, zx_colors[second_color_index]);
+      liq_image_quantize(image, attr, &res);
+      liq_set_dithering_level(res, dithering);
+      liq_write_remapped_image(res, image, image8bit, size);
+      const liq_palette *pal = liq_get_palette(res);
+
+      // Turn palletted image back into an RGBA image, and write it into the full size result image.
+      for(int y = 0; y < block_height; y++) {
+        for(int x = 0; x < block_width; x++) {
+          int image8BitPos = y * block_width + x;
+          int resultStartPos = ((block_start_y + y) * bytes_per_pixel * image_width) + ((block_start_x + x) * bytes_per_pixel);
+          result[resultStartPos + 0] = pal->entries[image8bit[image8BitPos]].r;
+          result[resultStartPos + 1] = pal->entries[image8bit[image8BitPos]].g;
+          result[resultStartPos + 2] = pal->entries[image8bit[image8BitPos]].b;
+          result[resultStartPos + 3] = pal->entries[image8bit[image8BitPos]].a;
+        }
+      }
+
+      liq_result_destroy(res);
+      liq_image_destroy(image);
+      liq_attr_destroy(attr);
+    }
+  }
+
+  free(image8bit);
+  return {
+    val(typed_memory_view(image_width*image_height*4, result)),
+    image_width,
+    image_height
+  };
+}
+
+void free_result() {
+  free(result);
+}
+
+EMSCRIPTEN_BINDINGS(my_module) {
+  class_<RawImage>("RawImage")
+    .property("buffer", &RawImage::buffer)
+    .property("width", &RawImage::width)
+    .property("height", &RawImage::height);
+
+  function("quantize", &quantize);
+  function("zx_quantize", &zx_quantize);
+  function("version", &version);
+  function("free_result", &free_result);
+}

codecs/imagequant/imagequant.d.ts

@@ -0,0 +1,15 @@
+interface RawImage {
+  buffer: Uint8Array;
+  width: number;
+  height: number;
+}
+
+interface QuantizerModule extends EmscriptenWasm.Module {
+  quantize(data: BufferSource, width: number, height: number, numColors: number, dither: number): RawImage;
+  zx_quantize(data: BufferSource, width: number, height: number, dither: number): RawImage;
+  free_result(): void;
+}
+
+export default function(opts: EmscriptenWasm.ModuleOpts): QuantizerModule;
+
+

codecs/imagequant/imagequant.js

@@ -0,0 +1,81 @@
+
+var imagequant = (function() {
+  var _scriptDir = typeof document !== 'undefined' && document.currentScript ? document.currentScript.src : undefined;
+  if (typeof __filename !== 'undefined') _scriptDir = _scriptDir || __filename;
+  return (
+function(imagequant) {
+  imagequant = imagequant || {};
+
+var e;e||(e=typeof imagequant !== 'undefined' ? imagequant : {});var r={},t;for(t in e)e.hasOwnProperty(t)&&(r[t]=e[t]);var aa=!1,z=!1,ba=!1,ca=!1;aa="object"===typeof window;z="function"===typeof importScripts;ba="object"===typeof process&&"object"===typeof process.versions&&"string"===typeof process.versions.node;ca=!aa&&!ba&&!z;var A="",da,B,ea,ha;
+if(ba)A=z?require("path").dirname(A)+"/":__dirname+"/",da=function(a,b){ea||(ea=require("fs"));ha||(ha=require("path"));a=ha.normalize(a);return ea.readFileSync(a,b?null:"utf8")},B=function(a){a=da(a,!0);a.buffer||(a=new Uint8Array(a));a.buffer||C("Assertion failed: undefined");return a},1<process.argv.length&&process.argv[1].replace(/\\/g,"/"),process.argv.slice(2),process.on("uncaughtException",function(a){throw a;}),process.on("unhandledRejection",C),e.inspect=function(){return"[Emscripten Module object]"};
+else if(ca)"undefined"!=typeof read&&(da=function(a){return read(a)}),B=function(a){if("function"===typeof readbuffer)return new Uint8Array(readbuffer(a));a=read(a,"binary");"object"===typeof a||C("Assertion failed: undefined");return a},"undefined"!==typeof print&&("undefined"===typeof console&&(console={}),console.log=print,console.warn=console.error="undefined"!==typeof printErr?printErr:print);else if(aa||z)z?A=self.location.href:document.currentScript&&(A=document.currentScript.src),_scriptDir&&
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+function ma(a,b,c){var d=b+c;for(c=b;a[c]&&!(c>=d);)++c;if(16<c-b&&a.subarray&&la)return la.decode(a.subarray(b,c));for(d="";b<c;){var f=a[b++];if(f&128){var g=a[b++]&63;if(192==(f&224))d+=String.fromCharCode((f&31)<<6|g);else{var n=a[b++]&63;f=224==(f&240)?(f&15)<<12|g<<6|n:(f&7)<<18|g<<12|n<<6|a[b++]&63;65536>f?d+=String.fromCharCode(f):(f-=65536,d+=String.fromCharCode(55296|f>>10,56320|f&1023))}}else d+=String.fromCharCode(f)}return d}
+function na(a,b,c){var d=H;if(0<c){c=b+c-1;for(var f=0;f<a.length;++f){var g=a.charCodeAt(f);if(55296<=g&&57343>=g){var n=a.charCodeAt(++f);g=65536+((g&1023)<<10)|n&1023}if(127>=g){if(b>=c)break;d[b++]=g}else{if(2047>=g){if(b+1>=c)break;d[b++]=192|g>>6}else{if(65535>=g){if(b+2>=c)break;d[b++]=224|g>>12}else{if(b+3>=c)break;d[b++]=240|g>>18;d[b++]=128|g>>12&63}d[b++]=128|g>>6&63}d[b++]=128|g&63}}d[b]=0}}var oa="undefined"!==typeof TextDecoder?new TextDecoder("utf-16le"):void 0;
+function pa(a){var b;for(b=a>>1;I[b];)++b;b<<=1;if(32<b-a&&oa)return oa.decode(H.subarray(a,b));b=0;for(var c="";;){var d=I[a+2*b>>1];if(0==d)return c;++b;c+=String.fromCharCode(d)}}function qa(a,b,c){void 0===c&&(c=2147483647);if(2>c)return 0;c-=2;var d=b;c=c<2*a.length?c/2:a.length;for(var f=0;f<c;++f)I[b>>1]=a.charCodeAt(f),b+=2;I[b>>1]=0;return b-d}function ra(a){return 2*a.length}
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+var Ma=e.___wasm_call_ctors=function(){return(Ma=e.___wasm_call_ctors=e.asm.v).apply(null,arguments)},Kb=e._malloc=function(){return(Kb=e._malloc=e.asm.w).apply(null,arguments)},Y=e._free=function(){return(Y=e._free=e.asm.x).apply(null,arguments)},xb=e.___getTypeName=function(){return(xb=e.___getTypeName=e.asm.y).apply(null,arguments)};e.___embind_register_native_and_builtin_types=function(){return(e.___embind_register_native_and_builtin_types=e.asm.z).apply(null,arguments)};
+e.dynCall_ii=function(){return(e.dynCall_ii=e.asm.A).apply(null,arguments)};e.dynCall_vi=function(){return(e.dynCall_vi=e.asm.B).apply(null,arguments)};e.dynCall_iii=function(){return(e.dynCall_iii=e.asm.C).apply(null,arguments)};e.dynCall_viii=function(){return(e.dynCall_viii=e.asm.D).apply(null,arguments)};e.dynCall_viiiiif=function(){return(e.dynCall_viiiiif=e.asm.E).apply(null,arguments)};e.dynCall_viiiif=function(){return(e.dynCall_viiiif=e.asm.F).apply(null,arguments)};
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+e.dynCall_jiji=function(){return(e.dynCall_jiji=e.asm.M).apply(null,arguments)};e.dynCall_iidiiii=function(){return(e.dynCall_iidiiii=e.asm.N).apply(null,arguments)};e.dynCall_vii=function(){return(e.dynCall_vii=e.asm.O).apply(null,arguments)};e.dynCall_viiiiii=function(){return(e.dynCall_viiiiii=e.asm.P).apply(null,arguments)};e.dynCall_viiiii=function(){return(e.dynCall_viiiii=e.asm.Q).apply(null,arguments)};e.dynCall_viiii=function(){return(e.dynCall_viiii=e.asm.R).apply(null,arguments)};
+e.asm=Mb;var Nb;e.then=function(a){if(Nb)a(e);else{var b=e.onRuntimeInitialized;e.onRuntimeInitialized=function(){b&&b();a(e)}}return e};N=function Ob(){Nb||Pb();Nb||(N=Ob)};
+function Pb(){function a(){if(!Nb&&(Nb=!0,e.calledRun=!0,!ka)){Ba(Da);Ba(Ea);if(e.onRuntimeInitialized)e.onRuntimeInitialized();if(e.postRun)for("function"==typeof e.postRun&&(e.postRun=[e.postRun]);e.postRun.length;){var b=e.postRun.shift();Fa.unshift(b)}Ba(Fa)}}if(!(0<M)){if(e.preRun)for("function"==typeof e.preRun&&(e.preRun=[e.preRun]);e.preRun.length;)Ga();Ba(Ca);0<M||(e.setStatus?(e.setStatus("Running..."),setTimeout(function(){setTimeout(function(){e.setStatus("")},1);a()},1)):a())}}
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+
+
+  return imagequant
+}
+);
+})();
+if (typeof exports === 'object' && typeof module === 'object')
+      module.exports = imagequant;
+    else if (typeof define === 'function' && define['amd'])
+      define([], function() { return imagequant; });
+    else if (typeof exports === 'object')
+      exports["imagequant"] = imagequant;
+    

codecs/imagequant/package.json

@@ -0,0 +1,13 @@
+{
+  "name": "imagequant",
+  "scripts": {
+    "install": "napa",
+    "build": "docker run --rm -v $(pwd):/src trzeci/emscripten-upstream ./build.sh"
+  },
+  "napa": {
+    "libimagequant": "ImageOptim/libimagequant#2.12.1"
+  },
+  "devDependencies": {
+    "napa": "3.0.0"
+  }
+}

codecs/mozjpeg_enc/README.md

@@ -0,0 +1,47 @@
+# MozJPEG encoder
+
+- Source: <https://github.com/mozilla/mozjpeg>
+- Version: v3.3.1
+
+## Dependencies
+
+- Docker
+
+## Example
+
+See `example.html`
+
+## API
+
+### `int version()`
+
+Returns the version of MozJPEG as a number. va.b.c is encoded as 0x0a0b0c
+
+### `void free_result()`
+
+Frees the result created by `encode()`.
+
+### `Uint8Array encode(std::string image_in, int image_width, int image_height, MozJpegOptions opts)`
+
+Encodes the given image with given dimension to JPEG. Options looks like this:
+
+```c++
+struct MozJpegOptions {
+  int quality;
+  bool baseline;
+  bool arithmetic;
+  bool progressive;
+  bool optimize_coding;
+  int smoothing;
+  int color_space;
+  int quant_table;
+  bool trellis_multipass;
+  bool trellis_opt_zero;
+  bool trellis_opt_table;
+  int trellis_loops;
+  bool auto_subsample;
+  int chroma_subsample;
+  bool separate_chroma_quality;
+  int chroma_quality;
+};
+```

codecs/mozjpeg_enc/build.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+set -e
+
+export OPTIMIZE="-Os"
+export LDFLAGS="${OPTIMIZE}"
+export CFLAGS="${OPTIMIZE}"
+export CPPFLAGS="${OPTIMIZE}"
+
+apt-get update
+apt-get install -qqy autoconf libtool libpng-dev pkg-config
+
+echo "============================================="
+echo "Compiling mozjpeg"
+echo "============================================="
+(
+  cd node_modules/mozjpeg
+  autoreconf -fiv
+  emconfigure ./configure --without-simd
+  emmake make libjpeg.la -j`nproc`
+)
+echo "============================================="
+echo "Compiling mozjpeg done"
+echo "============================================="
+
+echo "============================================="
+echo "Compiling wasm bindings"
+echo "============================================="
+(
+  emcc \
+    --bind \
+    ${OPTIMIZE} \
+    --closure 1 \
+    -s WASM=1 \
+    -s ALLOW_MEMORY_GROWTH=1 \
+    -s MODULARIZE=1 \
+    -s 'EXPORT_NAME="mozjpeg_enc"' \
+    -I node_modules/mozjpeg \
+    -o ./mozjpeg_enc.js \
+    -Wno-deprecated-register \
+    -Wno-writable-strings \
+    node_modules/mozjpeg/rdswitch.c \
+    -x c++ -std=c++11 \
+    mozjpeg_enc.cpp \
+    node_modules/mozjpeg/.libs/libjpeg.a
+)
+echo "============================================="
+echo "Compiling wasm bindings done"
+echo "============================================="
+
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo "Did you update your docker image?"
+echo "Run \`docker pull trzeci/emscripten-upstream\`"
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"

codecs/mozjpeg_enc/example.html

@@ -0,0 +1,48 @@
+<!doctype html>
+<script src='mozjpeg_enc.js'></script>
+<script>
+  const module = mozjpeg_enc();
+
+  async function loadImage(src) {
+    // Load image
+    const img = document.createElement('img');
+    img.src = src;
+    await new Promise(resolve => img.onload = resolve);
+    // Make canvas same size as image
+    const canvas = document.createElement('canvas');
+    [canvas.width, canvas.height] = [img.width, img.height];
+    // Draw image onto canvas
+    const ctx = canvas.getContext('2d');
+    ctx.drawImage(img, 0, 0);
+    return ctx.getImageData(0, 0, img.width, img.height);
+  }
+
+  module.onRuntimeInitialized = async _ => {
+    console.log('Version:', module.version().toString(16));
+    const image = await loadImage('../example.png');
+    const result = module.encode(image.data, image.width, image.height, {
+      quality: 75,
+      baseline: false,
+      arithmetic: false,
+      progressive: true,
+      optimize_coding: true,
+      smoothing: 0,
+      color_space: 3,
+      quant_table: 3,
+      trellis_multipass: false,
+      trellis_opt_zero: false,
+      trellis_opt_table: false,
+      trellis_loops: 1,
+      auto_subsample: true,
+      chroma_subsample: 2,
+      separate_chroma_quality: false,
+      chroma_quality: 75,
+    });
+
+    const blob = new Blob([result], {type: 'image/jpeg'});
+    const blobURL = URL.createObjectURL(blob);
+    const img = document.createElement('img');
+    img.src = blobURL;
+    document.body.appendChild(img);
+  };
+</script>

codecs/mozjpeg_enc/mozjpeg_enc.cpp

@@ -0,0 +1,234 @@
+#include <emscripten/bind.h>
+#include <emscripten/val.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <setjmp.h>
+#include <string.h>
+#include "config.h"
+#include "jpeglib.h"
+#include "cdjpeg.h"
+
+using namespace emscripten;
+
+// MozJPEG doesn’t expose a numeric version, so I have to do some fun C macro hackery to turn it
+// into a string. More details here: https://gcc.gnu.org/onlinedocs/cpp/Stringizing.html
+#define xstr(s) str(s)
+#define str(s) #s
+
+struct MozJpegOptions {
+  int quality;
+  bool baseline;
+  bool arithmetic;
+  bool progressive;
+  bool optimize_coding;
+  int smoothing;
+  int color_space;
+  int quant_table;
+  bool trellis_multipass;
+  bool trellis_opt_zero;
+  bool trellis_opt_table;
+  int trellis_loops;
+  bool auto_subsample;
+  int chroma_subsample;
+  bool separate_chroma_quality;
+  int chroma_quality;
+};
+
+int version() {
+  char buffer[] = xstr(MOZJPEG_VERSION);
+  int version = 0;
+  int last_index = 0;
+  for(int i = 0; i < strlen(buffer); i++) {
+    if(buffer[i] == '.') {
+      buffer[i] = '\0';
+      version = version << 8 | atoi(&buffer[last_index]);
+      buffer[i] = '.';
+      last_index = i + 1;
+    }
+  }
+  version = version << 8 | atoi(&buffer[last_index]);
+  return version;
+}
+
+uint8_t* last_result;
+struct jpeg_compress_struct cinfo;
+
+val encode(std::string image_in, int image_width, int image_height, MozJpegOptions opts) {
+  uint8_t* image_buffer = (uint8_t*) image_in.c_str();
+
+  // The code below is basically the `write_JPEG_file` function from
+  // https://github.com/mozilla/mozjpeg/blob/master/example.c
+  // I just write to memory instead of a file.
+
+
+  /* This struct contains the JPEG compression parameters and pointers to
+   * working space (which is allocated as needed by the JPEG library).
+   * It is possible to have several such structures, representing multiple
+   * compression/decompression processes, in existence at once.  We refer
+   * to any one struct (and its associated working data) as a "JPEG object".
+   */
+  /* This struct represents a JPEG error handler.  It is declared separately
+   * because applications often want to supply a specialized error handler
+   * (see the second half of this file for an example).  But here we just
+   * take the easy way out and use the standard error handler, which will
+   * print a message on stderr and call exit() if compression fails.
+   * Note that this struct must live as long as the main JPEG parameter
+   * struct, to avoid dangling-pointer problems.
+   */
+  struct jpeg_error_mgr jerr;
+  /* More stuff */
+  JSAMPROW row_pointer[1];      /* pointer to JSAMPLE row[s] */
+  int row_stride;               /* physical row width in image buffer */
+  uint8_t* output;
+  unsigned long size;
+
+  /* Step 1: allocate and initialize JPEG compression object */
+
+  /* We have to set up the error handler first, in case the initialization
+   * step fails.  (Unlikely, but it could happen if you are out of memory.)
+   * This routine fills in the contents of struct jerr, and returns jerr's
+   * address which we place into the link field in cinfo.
+   */
+  cinfo.err = jpeg_std_error(&jerr);
+  /* Now we can initialize the JPEG compression object. */
+  jpeg_create_compress(&cinfo);
+
+  /* Step 2: specify data destination (eg, a file) */
+  /* Note: steps 2 and 3 can be done in either order. */
+
+  /* Here we use the library-supplied code to send compressed data to a
+   * stdio stream.  You can also write your own code to do something else.
+   * VERY IMPORTANT: use "b" option to fopen() if you are on a machine that
+   * requires it in order to write binary files.
+   */
+  // if ((outfile = fopen(filename, "wb")) == NULL) {
+  //   fprintf(stderr, "can't open %s\n", filename);
+  //   exit(1);
+  // }
+  jpeg_mem_dest(&cinfo, &output, &size);
+
+  /* Step 3: set parameters for compression */
+
+  /* First we supply a description of the input image.
+   * Four fields of the cinfo struct must be filled in:
+   */
+  cinfo.image_width = image_width;      /* image width and height, in pixels */
+  cinfo.image_height = image_height;
+  cinfo.input_components = 4;           /* # of color components per pixel */
+  cinfo.in_color_space = JCS_EXT_RGBA;  /* colorspace of input image */
+  /* Now use the library's routine to set default compression parameters.
+   * (You must set at least cinfo.in_color_space before calling this,
+   * since the defaults depend on the source color space.)
+   */
+  jpeg_set_defaults(&cinfo);
+
+  jpeg_set_colorspace(&cinfo, (J_COLOR_SPACE) opts.color_space);
+
+  if (opts.quant_table != -1) {
+    jpeg_c_set_int_param(&cinfo, JINT_BASE_QUANT_TBL_IDX, opts.quant_table);
+  }
+
+  cinfo.optimize_coding = opts.optimize_coding;
+
+  if (opts.arithmetic) {
+    cinfo.arith_code = TRUE;
+    cinfo.optimize_coding = FALSE;
+  }
+
+  cinfo.smoothing_factor = opts.smoothing;
+
+  jpeg_c_set_bool_param(&cinfo, JBOOLEAN_USE_SCANS_IN_TRELLIS, opts.trellis_multipass);
+  jpeg_c_set_bool_param(&cinfo, JBOOLEAN_TRELLIS_EOB_OPT, opts.trellis_opt_zero);
+  jpeg_c_set_bool_param(&cinfo, JBOOLEAN_TRELLIS_Q_OPT, opts.trellis_opt_table);
+  jpeg_c_set_int_param(&cinfo, JINT_TRELLIS_NUM_LOOPS, opts.trellis_loops);
+
+  // A little hacky to build a string for this, but it means we can use set_quality_ratings which
+  // does some useful heuristic stuff.
+  std::string quality_str = std::to_string(opts.quality);
+
+  if (opts.separate_chroma_quality && opts.color_space == JCS_YCbCr) {
+    quality_str += "," + std::to_string(opts.chroma_quality);
+  }
+
+  char const *pqual = quality_str.c_str();
+
+  set_quality_ratings(&cinfo, (char*) pqual, opts.baseline);
+
+  if (!opts.auto_subsample && opts.color_space == JCS_YCbCr) {
+    cinfo.comp_info[0].h_samp_factor = opts.chroma_subsample;
+    cinfo.comp_info[0].v_samp_factor = opts.chroma_subsample;
+  }
+
+  if (!opts.baseline && opts.progressive) {
+    jpeg_simple_progression(&cinfo);
+  } else {
+    cinfo.num_scans = 0;
+    cinfo.scan_info = NULL;
+  }
+  /* Step 4: Start compressor */
+
+  /* TRUE ensures that we will write a complete interchange-JPEG file.
+   * Pass TRUE unless you are very sure of what you're doing.
+   */
+  jpeg_start_compress(&cinfo, TRUE);
+
+  /* Step 5: while (scan lines remain to be written) */
+  /*           jpeg_write_scanlines(...); */
+
+  /* Here we use the library's state variable cinfo.next_scanline as the
+   * loop counter, so that we don't have to keep track ourselves.
+   * To keep things simple, we pass one scanline per call; you can pass
+   * more if you wish, though.
+   */
+  row_stride = image_width * 4; /* JSAMPLEs per row in image_buffer */
+
+  while (cinfo.next_scanline < cinfo.image_height) {
+    /* jpeg_write_scanlines expects an array of pointers to scanlines.
+     * Here the array is only one element long, but you could pass
+     * more than one scanline at a time if that's more convenient.
+     */
+    row_pointer[0] = & image_buffer[cinfo.next_scanline * row_stride];
+    (void) jpeg_write_scanlines(&cinfo, row_pointer, 1);
+  }
+
+  /* Step 6: Finish compression */
+
+  jpeg_finish_compress(&cinfo);
+  /* Step 7: release JPEG compression object */
+
+  last_result = output;
+
+  /* And we're done! */
+  return val(typed_memory_view(size, output));
+}
+
+void free_result() {
+  /* This is an important step since it will release a good deal of memory. */
+  jpeg_destroy_compress(&cinfo);
+}
+
+EMSCRIPTEN_BINDINGS(my_module) {
+  value_object<MozJpegOptions>("MozJpegOptions")
+    .field("quality", &MozJpegOptions::quality)
+    .field("baseline", &MozJpegOptions::baseline)
+    .field("arithmetic", &MozJpegOptions::arithmetic)
+    .field("progressive", &MozJpegOptions::progressive)
+    .field("optimize_coding", &MozJpegOptions::optimize_coding)
+    .field("smoothing", &MozJpegOptions::smoothing)
+    .field("color_space", &MozJpegOptions::color_space)
+    .field("quant_table", &MozJpegOptions::quant_table)
+    .field("trellis_multipass", &MozJpegOptions::trellis_multipass)
+    .field("trellis_opt_zero", &MozJpegOptions::trellis_opt_zero)
+    .field("trellis_opt_table", &MozJpegOptions::trellis_opt_table)
+    .field("trellis_loops", &MozJpegOptions::trellis_loops)
+    .field("chroma_subsample", &MozJpegOptions::chroma_subsample)
+    .field("auto_subsample", &MozJpegOptions::auto_subsample)
+    .field("separate_chroma_quality", &MozJpegOptions::separate_chroma_quality)
+    .field("chroma_quality", &MozJpegOptions::chroma_quality)
+    ;
+
+  function("version", &version);
+  function("encode", &encode);
+  function("free_result", &free_result);
+}

codecs/mozjpeg_enc/mozjpeg_enc.d.ts

@@ -0,0 +1,8 @@
+import { EncodeOptions } from '../../src/codecs/mozjpeg/encoder-meta';
+
+interface MozJPEGModule extends EmscriptenWasm.Module {
+  encode(data: BufferSource, width: number, height: number, options: EncodeOptions): Uint8Array;
+  free_result(): void;
+}
+
+export default function(opts: EmscriptenWasm.ModuleOpts): MozJPEGModule;

codecs/mozjpeg_enc/mozjpeg_enc.js

@@ -0,0 +1,70 @@
+
+var mozjpeg_enc = (function() {
+  var _scriptDir = typeof document !== 'undefined' && document.currentScript ? document.currentScript.src : undefined;
+  if (typeof __filename !== 'undefined') _scriptDir = _scriptDir || __filename;
+  return (
+function(mozjpeg_enc) {
+  mozjpeg_enc = mozjpeg_enc || {};
+
+var c;c||(c=typeof mozjpeg_enc !== 'undefined' ? mozjpeg_enc : {});var r={},t;for(t in c)c.hasOwnProperty(t)&&(r[t]=c[t]);var aa="./this.program";function u(a,b){throw b;}var ba=!1,v=!1,ca=!1,da=!1;ba="object"===typeof window;v="function"===typeof importScripts;ca="object"===typeof process&&"object"===typeof process.versions&&"string"===typeof process.versions.node;da=!ba&&!ca&&!v;var w="",ea,x,fa,ha;
+if(ca)w=v?require("path").dirname(w)+"/":__dirname+"/",ea=function(a,b){fa||(fa=require("fs"));ha||(ha=require("path"));a=ha.normalize(a);return fa.readFileSync(a,b?null:"utf8")},x=function(a){a=ea(a,!0);a.buffer||(a=new Uint8Array(a));a.buffer||A("Assertion failed: undefined");return a},1<process.argv.length&&(aa=process.argv[1].replace(/\\/g,"/")),process.argv.slice(2),process.on("uncaughtException",function(a){if(!(a instanceof ia))throw a;}),process.on("unhandledRejection",A),u=function(a){process.exit(a)},
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+"checksum rayon-core 1.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "08a89b46efaf957e52b18062fb2f4660f8b8a4dde1807ca002690868ef2c85a9"
+"checksum rgb 0.8.17 (registry+https://github.com/rust-lang/crates.io-index)" = "a85b83fd629b0ce765f45316774fa6aaa95947fd74c8e4bbf3c6d1e349701d95"
+"checksum scopeguard 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
+"checksum syn 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)" = "0df0eb663f387145cab623dea85b09c2c5b4b0aef44e945d928e682fce71bb03"
+"checksum typed-arena 1.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a9b2228007eba4120145f785df0f6c92ea538f5a3635a612ecf4e334c8c1446d"
+"checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
+"checksum wasm-bindgen 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)" = "2cc57ce05287f8376e998cbddfb4c8cb43b84a7ec55cf4551d7c00eef317a47f"
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+"checksum wasm-bindgen-macro-support 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)" = "d68a5b36eef1be7868f668632863292e37739656a80fc4b9acec7b0bd35a4931"
+"checksum wasm-bindgen-shared 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)" = "daf76fe7d25ac79748a37538b7daeed1c7a6867c92d3245c12c6222e4a20d639"
+"checksum zopfli 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4079b79464426ade2a1b0177fb0ce8396ba6b4084267407e333573c666073964"

codecs/oxipng/Cargo.toml

@@ -0,0 +1,21 @@
+[package]
+name = "oxipng"
+version = "0.1.0"
+authors = ["Ingvar Stepanyan <me@rreverser.com>"]
+edition = "2018"
+publish = false
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies]
+oxipng = { version = "2.3.0", default-features = false }
+wasm-bindgen = "0.2.48"
+log = { version = "0.4", features = ["release_max_level_off"] }
+
+[profile.release]
+lto = true
+opt-level = "s"
+
+[patch.crates-io]
+oxipng = { git = "https://github.com/shssoichiro/oxipng.git", branch = "master" }

codecs/oxipng/Dockerfile

@@ -0,0 +1,12 @@
+FROM rust
+RUN rustup target add wasm32-unknown-unknown
+RUN curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
+
+RUN mkdir /opt/wabt && \
+ curl -L https://github.com/WebAssembly/wabt/releases/download/1.0.11/wabt-1.0.11-linux.tar.gz  | tar -xzf - -C /opt/wabt --strip 1
+
+RUN mkdir /opt/wasi-sdk && \
+  curl -L https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-8/wasi-sdk-8.0-linux.tar.gz | tar -xzf - -C /opt/wasi-sdk --strip 1
+
+ENV PATH="/opt/wabt:/opt/wasi-sdk/bin:${PATH}"
+WORKDIR /src

codecs/oxipng/build.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+set -e
+
+echo "============================================="
+echo "Compiling wasm"
+echo "============================================="
+(
+  wasm-pack build
+  wasm-strip pkg/oxipng_bg.wasm
+  rm pkg/.gitignore
+)
+echo "============================================="
+echo "Compiling wasm  done"
+echo "============================================="
+
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo "Did you update your docker image?"
+echo "Run \`docker pull ubuntu\`"
+echo "Run \`docker pull rust\`"
+echo "Run \`docker build -t squoosh-oxipng .\`"
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"

codecs/oxipng/package-lock.json

@@ -0,0 +1,4 @@
+{
+  "name": "oxipng",
+  "lockfileVersion": 1
+}

codecs/oxipng/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "oxipng",
+  "scripts": {
+    "build:image": "docker build -t squoosh-oxipng .",
+    "build": "docker run --rm -v $(pwd):/src squoosh-oxipng ./build.sh"
+  }
+}

codecs/oxipng/pkg/oxipng.d.ts

@@ -0,0 +1,8 @@
+/* tslint:disable */
+/* eslint-disable */
+/**
+* @param {Uint8Array} data 
+* @param {number} level 
+* @returns {Uint8Array} 
+*/
+export function optimise(data: Uint8Array, level: number): Uint8Array;

codecs/oxipng/pkg/oxipng.js

@@ -0,0 +1,60 @@
+import * as wasm from './oxipng_bg.wasm';
+
+const lTextDecoder = typeof TextDecoder === 'undefined' ? require('util').TextDecoder : TextDecoder;
+
+let cachedTextDecoder = new lTextDecoder('utf-8', { ignoreBOM: true, fatal: true });
+
+cachedTextDecoder.decode();
+
+let cachegetUint8Memory0 = null;
+function getUint8Memory0() {
+    if (cachegetUint8Memory0 === null || cachegetUint8Memory0.buffer !== wasm.memory.buffer) {
+        cachegetUint8Memory0 = new Uint8Array(wasm.memory.buffer);
+    }
+    return cachegetUint8Memory0;
+}
+
+function getStringFromWasm0(ptr, len) {
+    return cachedTextDecoder.decode(getUint8Memory0().subarray(ptr, ptr + len));
+}
+
+let WASM_VECTOR_LEN = 0;
+
+function passArray8ToWasm0(arg, malloc) {
+    const ptr = malloc(arg.length * 1);
+    getUint8Memory0().set(arg, ptr / 1);
+    WASM_VECTOR_LEN = arg.length;
+    return ptr;
+}
+
+let cachegetInt32Memory0 = null;
+function getInt32Memory0() {
+    if (cachegetInt32Memory0 === null || cachegetInt32Memory0.buffer !== wasm.memory.buffer) {
+        cachegetInt32Memory0 = new Int32Array(wasm.memory.buffer);
+    }
+    return cachegetInt32Memory0;
+}
+
+function getArrayU8FromWasm0(ptr, len) {
+    return getUint8Memory0().subarray(ptr / 1, ptr / 1 + len);
+}
+/**
+* @param {Uint8Array} data
+* @param {number} level
+* @returns {Uint8Array}
+*/
+export function optimise(data, level) {
+    var ptr0 = passArray8ToWasm0(data, wasm.__wbindgen_malloc);
+    var len0 = WASM_VECTOR_LEN;
+    wasm.optimise(8, ptr0, len0, level);
+    var r0 = getInt32Memory0()[8 / 4 + 0];
+    var r1 = getInt32Memory0()[8 / 4 + 1];
+    var v1 = getArrayU8FromWasm0(r0, r1).slice();
+    wasm.__wbindgen_free(r0, r1 * 1);
+    return v1;
+}
+
+export const __wbindgen_throw = function(arg0, arg1) {
+    throw new Error(getStringFromWasm0(arg0, arg1));
+};
+

codecs/oxipng/pkg/oxipng_bg.d.ts

@@ -0,0 +1,8 @@
+/* tslint:disable */
+/* eslint-disable */
+export const memory: WebAssembly.Memory;
+export function optimise(a: number, b: number, c: number, d: number): void;
+export function malloc(a: number): number;
+export function free(a: number): void;
+export function __wbindgen_malloc(a: number): number;
+export function __wbindgen_free(a: number, b: number): void;

codecs/oxipng/pkg/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "oxipng",
+  "collaborators": [
+    "Ingvar Stepanyan <me@rreverser.com>"
+  ],
+  "version": "0.1.0",
+  "files": [
+    "oxipng_bg.wasm",
+    "oxipng.js",
+    "oxipng.d.ts"
+  ],
+  "module": "oxipng.js",
+  "types": "oxipng.d.ts",
+  "sideEffects": false
+}

codecs/oxipng/src/lib.rs

@@ -0,0 +1,10 @@
+mod malloc_shim;
+
+use wasm_bindgen::prelude::*;
+
+#[wasm_bindgen(catch)]
+pub fn optimise(data: &[u8], level: u8) -> Vec<u8> {
+  let mut options = oxipng::Options::from_preset(level);
+  options.deflate = oxipng::Deflaters::Libdeflater;
+  oxipng::optimize_from_memory(data, &options).unwrap_throw()
+}

codecs/oxipng/src/malloc_shim.rs

@@ -0,0 +1,47 @@
+//! This is a module that provides `malloc` and `free` for `libdeflate`.
+//! These implementations are compatible with the standard signatures
+//! but use Rust allocator instead of including libc one as well.
+//!
+//! Rust allocator APIs requires passing size and alignment to the
+//! `dealloc` function. This is different from C API, which only
+//! expects a pointer in `free` and expects allocators to take care of
+//! storing any necessary information elsewhere.
+//!
+//! In order to simulate C API, we allocate a `size_and_data_ptr`
+//! of size `sizeof(usize) + size` where `size` is the requested number
+//! of bytes. Then, we store `size` at the beginning of the allocated
+//! chunk (within those `sizeof(usize)` bytes) and return
+//! `data_ptr = size_and_data_ptr + sizeof(usize)` to the calleer:
+//!
+//! [`size`][...actual data]
+//! -^------------------ `size_and_data_ptr`
+//! ---------^---------- `data_ptr`
+//!
+//! Then, in `free`, the caller gives us `data_ptr`. We can subtract
+//! `sizeof(usize)` back and get the original `size_and_data_ptr`.
+//! At this point we can read `size` back and call the Rust `dealloc`
+//! for the whole allocated chunk.
+//!
+//! I've raised an upstream issue to hopefully make this easier in
+//! future: https://github.com/ebiggers/libdeflate/issues/62
+
+use std::alloc::*;
+use std::mem::{align_of, size_of};
+
+unsafe fn layout_for(size: usize) -> Layout {
+    Layout::from_size_align_unchecked(size_of::<usize>() + size, align_of::<usize>())
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn malloc(size: usize) -> *mut u8 {
+    let size_and_data_ptr = alloc(layout_for(size));
+    *(size_and_data_ptr as *mut usize) = size;
+    size_and_data_ptr.add(size_of::<usize>())
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn free(data_ptr: *mut u8) {
+    let size_and_data_ptr = data_ptr.sub(size_of::<usize>());
+    let size = *(size_and_data_ptr as *const usize);
+    dealloc(size_and_data_ptr, layout_for(size))
+}

codecs/resize/.gitignore

@@ -0,0 +1,6 @@
+**/*.rs.bk
+target
+Cargo.lock
+bin/
+pkg/README.md
+lut.inc

codecs/resize/Cargo.toml

@@ -0,0 +1,37 @@
+[package]
+name = "resize"
+version = "0.1.0"
+authors = ["Surma <surma@surma.link>"]
+
+[lib]
+#crate-type = ["cdylib", "rlib"]
+crate-type = ["cdylib"]
+
+[features]
+default = ["console_error_panic_hook", "wee_alloc"]
+
+[dependencies]
+cfg-if = "0.1.2"
+wasm-bindgen = "0.2.38"
+resize = "0.3.0"
+
+# The `console_error_panic_hook` crate provides better debugging of panics by
+# logging them with `console.error`. This is great for development, but requires
+# all the `std::fmt` and `std::panicking` infrastructure, so isn't great for
+# code size when deploying.
+console_error_panic_hook = { version = "0.1.1", optional = true }
+
+# `wee_alloc` is a tiny allocator for wasm that is only ~1K in code size
+# compared to the default allocator's ~10K. It is slower than the default
+# allocator, however.
+#
+# Unfortunately, `wee_alloc` requires nightly Rust when targeting wasm for now.
+wee_alloc = { version = "0.4.2", optional = true }
+
+[dev-dependencies]
+wasm-bindgen-test = "0.2"
+
+[profile.release]
+# Tell `rustc` to optimize for small code size.
+opt-level = "s"
+lto = true

codecs/resize/Dockerfile

@@ -0,0 +1,9 @@
+FROM rust
+RUN rustup target add wasm32-unknown-unknown
+RUN curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
+
+RUN mkdir /opt/wabt && \
+ curl -L https://github.com/WebAssembly/wabt/releases/download/1.0.11/wabt-1.0.11-linux.tar.gz  | tar -xzf - -C /opt/wabt --strip 1
+
+ENV PATH="/opt/wabt:${PATH}"
+WORKDIR /src

codecs/resize/build.rs

@@ -0,0 +1,23 @@
+include!("./src/srgb.rs");
+
+use std::io::Write;
+
+fn main() -> std::io::Result<()> {
+    let mut srgb_to_linear_lut = String::from("static SRGB_TO_LINEAR_LUT: [f32; 256] = [");
+    let mut linear_to_srgb_lut = String::from("static LINEAR_TO_SRGB_LUT: [f32; 256] = [");
+    for i in 0..256 {
+        srgb_to_linear_lut.push_str(&format!("{0:.7}", srgb_to_linear((i as f32) / 255.0)));
+        srgb_to_linear_lut.push_str(",");
+        linear_to_srgb_lut.push_str(&format!("{0:.7}", linear_to_srgb((i as f32) / 255.0)));
+        linear_to_srgb_lut.push_str(",");
+    }
+    srgb_to_linear_lut.pop().unwrap();
+    linear_to_srgb_lut.pop().unwrap();
+    srgb_to_linear_lut.push_str("];");
+    linear_to_srgb_lut.push_str("];");
+
+    let mut file = std::fs::File::create("src/lut.inc")?;
+    file.write_all(srgb_to_linear_lut.as_bytes())?;
+    file.write_all(linear_to_srgb_lut.as_bytes())?;
+    Ok(())
+}

codecs/resize/build.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+set -e
+
+echo "============================================="
+echo "Compiling wasm"
+echo "============================================="
+(
+  wasm-pack build
+  wasm-strip pkg/resize_bg.wasm
+  rm pkg/.gitignore
+)
+echo "============================================="
+echo "Compiling wasm  done"
+echo "============================================="
+
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo "Did you update your docker image?"
+echo "Run \`docker pull ubuntu\`"
+echo "Run \`docker pull rust\`"
+echo "Run \`docker build -t squoosh-resize .\`"
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"

codecs/resize/package-lock.json

@@ -0,0 +1,4 @@
+{
+  "name": "resize",
+  "lockfileVersion": 1
+}

codecs/resize/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "resize",
+  "scripts": {
+    "build:image": "docker build -t squoosh-resize .",
+    "build": "docker run --rm -v $(pwd):/src squoosh-resize ./build.sh"
+  }
+}

codecs/resize/pkg/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "resize",
+  "collaborators": [
+    "Surma <surma@surma.link>"
+  ],
+  "version": "0.1.0",
+  "files": [
+    "resize_bg.wasm",
+    "resize.js",
+    "resize.d.ts"
+  ],
+  "module": "resize.js",
+  "types": "resize.d.ts",
+  "sideEffects": "false"
+}

codecs/resize/pkg/resize.d.ts

@@ -0,0 +1,13 @@
+/* tslint:disable */
+/**
+* @param {Uint8Array} input_image 
+* @param {number} input_width 
+* @param {number} input_height 
+* @param {number} output_width 
+* @param {number} output_height 
+* @param {number} typ_idx 
+* @param {boolean} premultiply 
+* @param {boolean} color_space_conversion 
+* @returns {Uint8Array} 
+*/
+export function resize(input_image: Uint8Array, input_width: number, input_height: number, output_width: number, output_height: number, typ_idx: number, premultiply: boolean, color_space_conversion: boolean): Uint8Array;

codecs/resize/pkg/resize.js

@@ -0,0 +1,50 @@
+import * as wasm from './resize_bg.wasm';
+
+let cachegetUint8Memory = null;
+function getUint8Memory() {
+    if (cachegetUint8Memory === null || cachegetUint8Memory.buffer !== wasm.memory.buffer) {
+        cachegetUint8Memory = new Uint8Array(wasm.memory.buffer);
+    }
+    return cachegetUint8Memory;
+}
+
+let WASM_VECTOR_LEN = 0;
+
+function passArray8ToWasm(arg) {
+    const ptr = wasm.__wbindgen_malloc(arg.length * 1);
+    getUint8Memory().set(arg, ptr / 1);
+    WASM_VECTOR_LEN = arg.length;
+    return ptr;
+}
+
+let cachegetInt32Memory = null;
+function getInt32Memory() {
+    if (cachegetInt32Memory === null || cachegetInt32Memory.buffer !== wasm.memory.buffer) {
+        cachegetInt32Memory = new Int32Array(wasm.memory.buffer);
+    }
+    return cachegetInt32Memory;
+}
+
+function getArrayU8FromWasm(ptr, len) {
+    return getUint8Memory().subarray(ptr / 1, ptr / 1 + len);
+}
+/**
+* @param {Uint8Array} input_image
+* @param {number} input_width
+* @param {number} input_height
+* @param {number} output_width
+* @param {number} output_height
+* @param {number} typ_idx
+* @param {boolean} premultiply
+* @param {boolean} color_space_conversion
+* @returns {Uint8Array}
+*/
+export function resize(input_image, input_width, input_height, output_width, output_height, typ_idx, premultiply, color_space_conversion) {
+    const retptr = 8;
+    const ret = wasm.resize(retptr, passArray8ToWasm(input_image), WASM_VECTOR_LEN, input_width, input_height, output_width, output_height, typ_idx, premultiply, color_space_conversion);
+    const memi32 = getInt32Memory();
+    const v0 = getArrayU8FromWasm(memi32[retptr / 4 + 0], memi32[retptr / 4 + 1]).slice();
+    wasm.__wbindgen_free(memi32[retptr / 4 + 0], memi32[retptr / 4 + 1] * 1);
+    return v0;
+}
+

codecs/resize/pkg/resize_bg.d.ts

@@ -0,0 +1,5 @@
+/* tslint:disable */
+export const memory: WebAssembly.Memory;
+export function __wbindgen_malloc(a: number): number;
+export function __wbindgen_free(a: number, b: number): void;
+export function resize(a: number, b: number, c: number, d: number, e: number, f: number, g: number, h: number, i: number, j: number): void;

codecs/resize/src/lib.rs

@@ -0,0 +1,121 @@
+extern crate cfg_if;
+extern crate resize;
+extern crate wasm_bindgen;
+
+mod utils;
+
+use cfg_if::cfg_if;
+use resize::Pixel::RGBA;
+use resize::Type;
+use wasm_bindgen::prelude::*;
+
+mod srgb;
+use srgb::Clamp;
+
+cfg_if! {
+    // When the `wee_alloc` feature is enabled, use `wee_alloc` as the global
+    // allocator.
+    if #[cfg(feature = "wee_alloc")] {
+        extern crate wee_alloc;
+        #[global_allocator]
+        static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
+    }
+}
+
+include!("./lut.inc");
+
+// If `with_space_conversion` is true, this function returns 2 functions that
+// convert from sRGB to linear RGB and vice versa. If `with_space_conversion` is
+// false, the 2 functions returned do nothing.
+fn converter_funcs(with_space_conversion: bool) -> ((fn(u8) -> f32), (fn(f32) -> u8)) {
+    if with_space_conversion {
+        (
+            |v| SRGB_TO_LINEAR_LUT[v as usize] * 255.0,
+            |v| (LINEAR_TO_SRGB_LUT[v as usize] * 255.0) as u8,
+        )
+    } else {
+        (|v| v as f32, |v| v as u8)
+    }
+}
+
+// If `with_alpha_premultiplication` is true, this function returns a function
+// that premultiply the alpha channel with the given channel value and another
+// function that reverses that process. If `with_alpha_premultiplication` is
+// false, the functions just return the channel value.
+fn alpha_multiplier_funcs(
+    with_alpha_premultiplication: bool,
+) -> ((fn(f32, u8) -> u8), (fn(u8, u8) -> f32)) {
+    if with_alpha_premultiplication {
+        (
+            |v, a| (v * (a as f32) / 255.0) as u8,
+            |v, a| (v as f32) * 255.0 / (a as f32).clamp(0.0, 255.0),
+        )
+    } else {
+        (|v, _a| v as u8, |v, _a| v as f32)
+    }
+}
+
+#[wasm_bindgen]
+#[no_mangle]
+pub fn resize(
+    mut input_image: Vec<u8>,
+    input_width: usize,
+    input_height: usize,
+    output_width: usize,
+    output_height: usize,
+    typ_idx: usize,
+    premultiply: bool,
+    color_space_conversion: bool,
+) -> Vec<u8> {
+    let typ = match typ_idx {
+        0 => Type::Triangle,
+        1 => Type::Catrom,
+        2 => Type::Mitchell,
+        3 => Type::Lanczos3,
+        _ => panic!("Nope"),
+    };
+    let num_input_pixels = input_width * input_height;
+    let num_output_pixels = output_width * output_height;
+
+    let (to_linear, to_color_space) = converter_funcs(color_space_conversion);
+    let (premultiplier, demultiplier) = alpha_multiplier_funcs(premultiply);
+
+    // If both options are false, there is no preprocessing on the pixel valus
+    // and we can skip the loop.
+    if premultiply || color_space_conversion {
+        for i in 0..num_input_pixels {
+            for j in 0..3 {
+                input_image[4 * i + j] =
+                    premultiplier(to_linear(input_image[4 * i + j]), input_image[4 * i + 3]);
+            }
+        }
+    }
+
+    let mut resizer = resize::new(
+        input_width,
+        input_height,
+        output_width,
+        output_height,
+        RGBA,
+        typ,
+    );
+    let mut output_image = Vec::<u8>::with_capacity(num_output_pixels * 4);
+    output_image.resize(num_output_pixels * 4, 0);
+    resizer.resize(input_image.as_slice(), output_image.as_mut_slice());
+
+    if premultiply || color_space_conversion {
+        for i in 0..num_output_pixels {
+            for j in 0..3 {
+                // We don’t need to worry about division by zero, as division by zero
+                // is well-defined on floats to return ±Inf. ±Inf is converted to 0
+                // when casting to integers.
+                output_image[4 * i + j] = to_color_space(demultiplier(
+                    output_image[4 * i + j],
+                    output_image[4 * i + 3],
+                ));
+            }
+        }
+    }
+
+    return output_image;
+}

codecs/resize/src/srgb.rs

@@ -0,0 +1,29 @@
+pub trait Clamp: std::cmp::PartialOrd + Sized {
+    fn clamp(self, min: Self, max: Self) -> Self {
+        if self.lt(&min) {
+            min
+        } else if self.gt(&max) {
+            max
+        } else {
+            self
+        }
+    }
+}
+
+impl Clamp for f32 {}
+
+pub fn srgb_to_linear(v: f32) -> f32 {
+    if v < 0.04045 {
+        v / 12.92
+    } else {
+        ((v + 0.055) / 1.055).powf(2.4).clamp(0.0, 1.0)
+    }
+}
+
+pub fn linear_to_srgb(v: f32) -> f32 {
+    if v < 0.0031308 {
+        v * 12.92
+    } else {
+        (1.055 * v.powf(1.0 / 2.4) - 0.055).clamp(0.0, 1.0)
+    }
+}

codecs/resize/src/utils.rs

@@ -0,0 +1,17 @@
+use cfg_if::cfg_if;
+
+cfg_if! {
+    // When the `console_error_panic_hook` feature is enabled, we can call the
+    // `set_panic_hook` function at least once during initialization, and then
+    // we will get better error messages if our code ever panics.
+    //
+    // For more details see
+    // https://github.com/rustwasm/console_error_panic_hook#readme
+    if #[cfg(feature = "console_error_panic_hook")] {
+        extern crate console_error_panic_hook;
+        pub use self::console_error_panic_hook::set_once as set_panic_hook;
+    } else {
+        #[inline]
+        pub fn set_panic_hook() {}
+    }
+}

codecs/rotate/.gitignore

@@ -0,0 +1,2 @@
+target
+Cargo.lock

codecs/rotate/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "rotate"
+version = "0.1.0"
+authors = ["Surma <surma@google.com>"]
+edition = "2018"
+
+[lib]
+name = "rotate"
+path = "rotate.rs"
+crate-type = ["cdylib", "rlib"]
+
+[profile.release]
+lto = true
+opt-level = "s"

codecs/rotate/Dockerfile

@@ -0,0 +1,8 @@
+FROM rust
+RUN rustup target add wasm32-unknown-unknown
+
+RUN mkdir /opt/wabt && \
+ curl -L https://github.com/WebAssembly/wabt/releases/download/1.0.11/wabt-1.0.11-linux.tar.gz  | tar -xzf - -C /opt/wabt --strip 1
+
+ENV PATH="/opt/wabt:${PATH}"
+WORKDIR /src

codecs/rotate/benchmark.js

@@ -0,0 +1,45 @@
+// THIS IS NOT A NODE SCRIPT
+// This is a d8 script. Please install jsvu[1] and install v8.
+// Then run `npm run --silent benchmark`.
+// [1]: https://github.com/GoogleChromeLabs/jsvu
+async function init() {
+  //  Adjustable constants.
+  const imageDimensions = 4096;
+  const iterations = new Array(100);
+
+  // Constants. Don’t change.
+  const imageByteSize = imageDimensions * imageDimensions * 4;
+  const wasmPageSize = 64 * 1024;
+
+  const buffer = readbuffer("rotate.wasm");
+  const { instance } = await WebAssembly.instantiate(buffer);
+
+  const pagesAvailable = Math.floor(
+    instance.exports.memory.buffer.byteLength / wasmPageSize
+  );
+  const pagesNeeded = Math.floor((imageByteSize * 2 + 4) / wasmPageSize) + 1;
+  const additionalPagesNeeded = pagesNeeded - pagesAvailable;
+  if (additionalPagesNeeded > 0) {
+    instance.exports.memory.grow(additionalPagesNeeded);
+  }
+
+  [0, 90, 180, 270].forEach(rotation => {
+    print(`\n${rotation} degrees`);
+    print(`==============================`);
+    for (let i = 0; i < 100; i++) {
+      const start = Date.now();
+      instance.exports.rotate(imageDimensions, imageDimensions, rotation);
+      iterations[i] = Date.now() - start;
+    }
+    const average = iterations.reduce((sum, c) => sum + c) / iterations.length;
+    const stddev = Math.sqrt(
+      iterations
+        .map(i => Math.pow(i - average, 2))
+        .reduce((sum, c) => sum + c) / iterations.length
+    );
+    print(`n = ${iterations.length}`);
+    print(`Average: ${average}`);
+    print(`StdDev: ${stddev}`);
+  });
+}
+init().catch(e => console.error(e.stack));

codecs/rotate/build.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+set -e
+
+echo "============================================="
+echo "Compiling wasm"
+echo "============================================="
+(
+  cargo build \
+    --target wasm32-unknown-unknown \
+    --release
+  cp target/wasm32-unknown-unknown/release/rotate.wasm .
+  wasm-strip rotate.wasm
+)
+echo "============================================="
+echo "Compiling wasm  done"
+echo "============================================="
+
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo "Did you update your docker image?"
+echo "Run \`docker pull ubuntu\`"
+echo "Run \`docker pull rust\`"
+echo "Run \`docker build -t squoosh-rotate .\`"
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"

codecs/rotate/package.json

@@ -0,0 +1,11 @@
+{
+  "name": "rotate",
+  "scripts": {
+    "build:image": "docker build -t squoosh-rotate .",
+    "build": "docker run --rm -v $(pwd):/src squoosh-rotate ./build.sh",
+    "benchmark": "echo File size after gzip && npm run benchmark:filesize && echo Optimizing && npm run -s benchmark:optimizing",
+    "benchmark:baseline": "v8 --liftoff --no-wasm-tier-up --no-opt ./benchmark.js",
+    "benchmark:optimizing": "v8 --no-liftoff --no-wasm-tier-up ./benchmark.js",
+    "benchmark:filesize": "cat rotate.wasm | gzip -c9n | wc -c"
+  }
+}

codecs/rotate/rotate.rs

@@ -0,0 +1,113 @@
+use std::slice::{from_raw_parts, from_raw_parts_mut};
+
+// This function is taken from Zachary Dremann
+// https://github.com/GoogleChromeLabs/squoosh/pull/462
+trait HardUnwrap<T> {
+    fn unwrap_hard(self) -> T;
+}
+
+impl<T> HardUnwrap<T> for Option<T> {
+    #[cfg(not(debug_assertions))]
+    #[inline]
+    fn unwrap_hard(self) -> T {
+        match self {
+            Some(t) => t,
+            None => std::process::abort(),
+        }
+    }
+
+    #[cfg(debug_assertions)]
+    fn unwrap_hard(self) -> T {
+        self.unwrap()
+    }
+}
+
+const TILE_SIZE: usize = 16;
+
+fn get_buffers<'a>(width: usize, height: usize) -> (&'a [u32], &'a mut [u32]) {
+    let num_pixels = width * height;
+    let in_b: &[u32];
+    let out_b: &mut [u32];
+    unsafe {
+        in_b = from_raw_parts::<u32>(8 as *const u32, num_pixels);
+        out_b = from_raw_parts_mut::<u32>((num_pixels * 4 + 8) as *mut u32, num_pixels);
+    }
+    return (in_b, out_b);
+}
+
+#[inline(never)]
+fn rotate_0(width: usize, height: usize) {
+    let (in_b, out_b) = get_buffers(width, height);
+    for (in_p, out_p) in in_b.iter().zip(out_b.iter_mut()) {
+        *out_p = *in_p;
+    }
+}
+
+#[inline(never)]
+fn rotate_90(width: usize, height: usize) {
+    let (in_b, out_b) = get_buffers(width, height);
+    let new_width = height;
+    let _new_height = width;
+    for y_start in (0..height).step_by(TILE_SIZE) {
+        for x_start in (0..width).step_by(TILE_SIZE) {
+            for y in y_start..(y_start + TILE_SIZE).min(height) {
+                let in_offset = y * width;
+                let in_bounds = if x_start + TILE_SIZE < width {
+                    (in_offset + x_start)..(in_offset + x_start + TILE_SIZE)
+                } else {
+                    (in_offset + x_start)..(in_offset + width)
+                };
+                let in_chunk = in_b.get(in_bounds).unwrap_hard();
+                for (x, in_p) in in_chunk.iter().enumerate() {
+                    let new_x = (new_width - 1) - y;
+                    let new_y = x + x_start;
+                    *out_b.get_mut(new_y * new_width + new_x).unwrap_hard() = *in_p;
+                }
+            }
+        }
+    }
+}
+
+#[inline(never)]
+fn rotate_180(width: usize, height: usize) {
+    let (in_b, out_b) = get_buffers(width, height);
+    for (in_p, out_p) in in_b.iter().zip(out_b.iter_mut().rev()) {
+        *out_p = *in_p;
+    }
+}
+
+#[inline(never)]
+fn rotate_270(width: usize, height: usize) {
+    let (in_b, out_b) = get_buffers(width, height);
+    let new_width = height;
+    let new_height = width;
+    for y_start in (0..height).step_by(TILE_SIZE) {
+        for x_start in (0..width).step_by(TILE_SIZE) {
+            for y in y_start..(y_start + TILE_SIZE).min(height) {
+                let in_offset = y * width;
+                let in_bounds = if x_start + TILE_SIZE < width {
+                    (in_offset + x_start)..(in_offset + x_start + TILE_SIZE)
+                } else {
+                    (in_offset + x_start)..(in_offset + width)
+                };
+                let in_chunk = in_b.get(in_bounds).unwrap_hard();
+                for (x, in_p) in in_chunk.iter().enumerate() {
+                    let new_x = y;
+                    let new_y = new_height - 1 - (x_start + x);
+                    *out_b.get_mut(new_y * new_width + new_x).unwrap_hard() = *in_p;
+                }
+            }
+        }
+    }
+}
+
+#[no_mangle]
+fn rotate(width: usize, height: usize, rotate: usize) {
+    match rotate {
+        0 => rotate_0(width, height),
+        90 => rotate_90(width, height),
+        180 => rotate_180(width, height),
+        270 => rotate_270(width, height),
+        _ => std::process::abort(),
+    }
+}

codecs/webp_dec/README.md

@@ -0,0 +1,22 @@
+# WebP decoder
+
+- Source: <https://github.com/webmproject/libwebp>
+- Version: v1.0.2
+
+## Example
+
+See `example.html`
+
+## API
+
+### `int version()`
+
+Returns the version of libwebp as a number. va.b.c is encoded as 0x0a0b0c
+
+### `RawImage decode(std::string buffer)`
+
+Decodes the given webp buffer into raw RGBA. `RawImage` is a class with 3 fields: `buffer`, `width`, and `height`.
+
+### `void free_result()`
+
+Frees the result created by `decode()`.

codecs/webp_dec/build.sh

@@ -0,0 +1,61 @@
+#!/bin/bash
+
+set -e
+
+export OPTIMIZE="-Os"
+export LDFLAGS="${OPTIMIZE}"
+export CFLAGS="${OPTIMIZE}"
+export CPPFLAGS="${OPTIMIZE}"
+apt-get update
+apt-get install -qqy autoconf libtool libpng-dev pkg-config
+
+echo "============================================="
+echo "Compiling libwebp"
+echo "============================================="
+test -n "$SKIP_LIBWEBP" || (
+  cd node_modules/libwebp
+  autoreconf -fiv
+  rm -rf build || true
+  mkdir -p build && cd build
+  emconfigure ../configure \
+    --disable-libwebpdemux \
+    --disable-wic \
+    --disable-gif \
+    --disable-tiff \
+    --disable-jpeg \
+    --disable-png \
+    --disable-sdl \
+    --disable-gl \
+    --disable-threading \
+    --disable-neon-rtcd \
+    --disable-neon \
+    --disable-sse2 \
+    --disable-sse4.1
+  emmake make -j`nproc`
+)
+echo "============================================="
+echo "Compiling wasm bindings"
+echo "============================================="
+(
+  emcc \
+    ${OPTIMIZE} \
+    --closure 1 \
+    --bind \
+    -s ALLOW_MEMORY_GROWTH=1 \
+    -s MODULARIZE=1 \
+    -s 'EXPORT_NAME="webp_dec"' \
+    --std=c++11 \
+    -I node_modules/libwebp \
+    -o ./webp_dec.js \
+    -x c++ \
+    webp_dec.cpp \
+    node_modules/libwebp/build/src/.libs/libwebp.a
+)
+echo "============================================="
+echo "Compiling wasm bindings done"
+echo "============================================="
+
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo "Did you update your docker image?"
+echo "Run \`docker pull trzeci/emscripten-upstream\`"
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"

codecs/webp_dec/example.html

@@ -0,0 +1,24 @@
+<!doctype html>
+<script src='webp_dec.js'></script>
+<script>
+  const Module = webp_dec();
+
+  async function loadFile(src) {
+    const resp = await fetch(src);
+    return await resp.arrayBuffer();
+  }
+
+  Module.onRuntimeInitialized = async _ => {
+    console.log('Version:', Module.version().toString(16));
+    const image = await loadFile('../example.webp');
+    const result = Module.decode(image);
+    const imageData = new ImageData(new Uint8ClampedArray(result.buffer), result.width, result.height);
+    Module.free_result();
+    const canvas = document.createElement('canvas');
+    canvas.width = result.width;
+    canvas.height = result.height;
+    document.body.appendChild(canvas);
+    const ctx = canvas.getContext('2d');
+    ctx.putImageData(imageData, 0, 0);
+  };
+</script>

codecs/webp_dec/package.json

@@ -0,0 +1,13 @@
+{
+  "name": "webp_dec",
+  "scripts": {
+    "install": "napa",
+    "build": "docker run --rm -v $(pwd):/src trzeci/emscripten-upstream ./build.sh"
+  },
+  "napa": {
+    "libwebp": "webmproject/libwebp#v1.0.2"
+  },
+  "devDependencies": {
+    "napa": "3.0.0"
+  }
+}

codecs/webp_dec/webp_dec.cpp

@@ -0,0 +1,47 @@
+#include "emscripten/bind.h"
+#include "emscripten/val.h"
+#include "src/webp/decode.h"
+#include "src/webp/demux.h"
+#include <string>
+
+using namespace emscripten;
+
+int version() {
+  return WebPGetDecoderVersion();
+}
+
+class RawImage {
+public:
+  val buffer;
+  int width;
+  int height;
+
+  RawImage(val b, int w, int h)
+    : buffer(b), width(w), height(h) {}
+};
+
+uint8_t* last_result;
+RawImage decode(std::string buffer) {
+  int width, height;
+  last_result = WebPDecodeRGBA((const uint8_t*)buffer.c_str(), buffer.size(), &width, &height);
+  return RawImage(
+    val(typed_memory_view(width*height*4, last_result)),
+    width,
+    height
+  );
+}
+
+void free_result() {
+  free(last_result);
+}
+
+EMSCRIPTEN_BINDINGS(my_module) {
+  class_<RawImage>("RawImage")
+    .property("buffer", &RawImage::buffer)
+    .property("width", &RawImage::width)
+    .property("height", &RawImage::height);
+
+  function("decode", &decode);
+  function("version", &version);
+  function("free_result", &free_result);
+}

codecs/webp_dec/webp_dec.d.ts

@@ -0,0 +1,13 @@
+interface RawImage {
+  buffer: Uint8Array;
+  width: number;
+  height: number;
+}
+
+interface WebPModule extends EmscriptenWasm.Module {
+  decode(data: BufferSource): RawImage;
+  free_result(): void;
+}
+
+export default function(opts: EmscriptenWasm.ModuleOpts): WebPModule;
+

codecs/webp_dec/webp_dec.js

@@ -0,0 +1,79 @@
+
+var webp_dec = (function() {
+  var _scriptDir = typeof document !== 'undefined' && document.currentScript ? document.currentScript.src : undefined;
+  if (typeof __filename !== 'undefined') _scriptDir = _scriptDir || __filename;
+  return (
+function(webp_dec) {
+  webp_dec = webp_dec || {};
+
+var e;e||(e=typeof webp_dec !== 'undefined' ? webp_dec : {});var r={},w;for(w in e)e.hasOwnProperty(w)&&(r[w]=e[w]);var aa=!1,z=!1,ba=!1,ca=!1;aa="object"===typeof window;z="function"===typeof importScripts;ba="object"===typeof process&&"object"===typeof process.versions&&"string"===typeof process.versions.node;ca=!aa&&!ba&&!z;var A="",da,B,ea,ha;
+if(ba)A=z?require("path").dirname(A)+"/":__dirname+"/",da=function(a,b){ea||(ea=require("fs"));ha||(ha=require("path"));a=ha.normalize(a);return ea.readFileSync(a,b?null:"utf8")},B=function(a){a=da(a,!0);a.buffer||(a=new Uint8Array(a));a.buffer||D("Assertion failed: undefined");return a},1<process.argv.length&&process.argv[1].replace(/\\/g,"/"),process.argv.slice(2),process.on("uncaughtException",function(a){throw a;}),process.on("unhandledRejection",D),e.inspect=function(){return"[Emscripten Module object]"};
+else if(ca)"undefined"!=typeof read&&(da=function(a){return read(a)}),B=function(a){if("function"===typeof readbuffer)return new Uint8Array(readbuffer(a));a=read(a,"binary");"object"===typeof a||D("Assertion failed: undefined");return a},"undefined"!==typeof print&&("undefined"===typeof console&&(console={}),console.log=print,console.warn=console.error="undefined"!==typeof printErr?printErr:print);else if(aa||z)z?A=self.location.href:document.currentScript&&(A=document.currentScript.src),_scriptDir&&
+(A=_scriptDir),0!==A.indexOf("blob:")?A=A.substr(0,A.lastIndexOf("/")+1):A="",da=function(a){var b=new XMLHttpRequest;b.open("GET",a,!1);b.send(null);return b.responseText},z&&(B=function(a){var b=new XMLHttpRequest;b.open("GET",a,!1);b.responseType="arraybuffer";b.send(null);return new Uint8Array(b.response)});var ia=e.print||console.log.bind(console),E=e.printErr||console.warn.bind(console);for(w in r)r.hasOwnProperty(w)&&(e[w]=r[w]);r=null;var F;e.wasmBinary&&(F=e.wasmBinary);var noExitRuntime;
+e.noExitRuntime&&(noExitRuntime=e.noExitRuntime);"object"!==typeof WebAssembly&&E("no native wasm support detected");var G,ja=new WebAssembly.Table({initial:190,maximum:190,element:"anyfunc"}),ka=!1,la="undefined"!==typeof TextDecoder?new TextDecoder("utf8"):void 0;
+function ma(a,b,c){var d=H;if(0<c){c=b+c-1;for(var f=0;f<a.length;++f){var g=a.charCodeAt(f);if(55296<=g&&57343>=g){var q=a.charCodeAt(++f);g=65536+((g&1023)<<10)|q&1023}if(127>=g){if(b>=c)break;d[b++]=g}else{if(2047>=g){if(b+1>=c)break;d[b++]=192|g>>6}else{if(65535>=g){if(b+2>=c)break;d[b++]=224|g>>12}else{if(b+3>=c)break;d[b++]=240|g>>18;d[b++]=128|g>>12&63}d[b++]=128|g>>6&63}d[b++]=128|g&63}}d[b]=0}}var na="undefined"!==typeof TextDecoder?new TextDecoder("utf-16le"):void 0;
+function oa(a){var b;for(b=a>>1;I[b];)++b;b<<=1;if(32<b-a&&na)return na.decode(H.subarray(a,b));b=0;for(var c="";;){var d=I[a+2*b>>1];if(0==d)return c;++b;c+=String.fromCharCode(d)}}function pa(a,b,c){void 0===c&&(c=2147483647);if(2>c)return 0;c-=2;var d=b;c=c<2*a.length?c/2:a.length;for(var f=0;f<c;++f)I[b>>1]=a.charCodeAt(f),b+=2;I[b>>1]=0;return b-d}function qa(a){return 2*a.length}
+function ra(a){for(var b=0,c="";;){var d=J[a+4*b>>2];if(0==d)return c;++b;65536<=d?(d-=65536,c+=String.fromCharCode(55296|d>>10,56320|d&1023)):c+=String.fromCharCode(d)}}function sa(a,b,c){void 0===c&&(c=2147483647);if(4>c)return 0;var d=b;c=d+c-4;for(var f=0;f<a.length;++f){var g=a.charCodeAt(f);if(55296<=g&&57343>=g){var q=a.charCodeAt(++f);g=65536+((g&1023)<<10)|q&1023}J[b>>2]=g;b+=4;if(b+4>c)break}J[b>>2]=0;return b-d}
+function ta(a){for(var b=0,c=0;c<a.length;++c){var d=a.charCodeAt(c);55296<=d&&57343>=d&&++c;b+=4}return b}var K,ua,H,I,va,J,L,wa,xa;function ya(a){K=a;e.HEAP8=ua=new Int8Array(a);e.HEAP16=I=new Int16Array(a);e.HEAP32=J=new Int32Array(a);e.HEAPU8=H=new Uint8Array(a);e.HEAPU16=va=new Uint16Array(a);e.HEAPU32=L=new Uint32Array(a);e.HEAPF32=wa=new Float32Array(a);e.HEAPF64=xa=new Float64Array(a)}var za=e.INITIAL_MEMORY||16777216;e.wasmMemory?G=e.wasmMemory:G=new WebAssembly.Memory({initial:za/65536});
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+u+=v;v=n+b}}0!=t&&(k[l+4+m*b>>h]=t);Y(l);return u},toWireType:function(l,m){"string"!==typeof m&&S("Cannot pass non-string to C++ string type "+c);var k=g(m),p=Ib(4+k+b);L[p>>2]=k>>h;f(m,p+4,k+b);null!==l&&l.push(Y,p);return p},argPackAdvance:8,readValueFromPointer:ob,U:function(l){Y(l)}})},k:function(a,b){b=P(b);T(a,{ta:!0,name:b,argPackAdvance:0,fromWireType:function(){},toWireType:function(){}})},h:Bb,m:function(a){4<a&&(Z[a].ea+=1)},i:function(a,b){var c=R[a];void 0===c&&S("_emval_take_value has unknown type "+
+vb(a));a=c.readValueFromPointer(b);return lb(a)},l:function(){D()},p:function(a,b,c){H.copyWithin(a,b,b+c)},q:function(a){var b=H.length;if(2147418112<a)return!1;for(var c=1;4>=c;c*=2){var d=b*(1+.2/c);d=Math.min(d,a+100663296);d=Math.max(16777216,a,d);0<d%65536&&(d+=65536-d%65536);a:{try{G.grow(Math.min(2147418112,d)-K.byteLength+65535>>16);ya(G.buffer);var f=1;break a}catch(g){}f=void 0}if(f)return!0}return!1},memory:G,o:function(){},table:ja},Kb=function(){function a(f){e.asm=f.exports;M--;e.monitorRunDependencies&&
+e.monitorRunDependencies(M);0==M&&(null!==Ga&&(clearInterval(Ga),Ga=null),N&&(f=N,N=null,f()))}function b(f){a(f.instance)}function c(f){return Ka().then(function(g){return WebAssembly.instantiate(g,d)}).then(f,function(g){E("failed to asynchronously prepare wasm: "+g);D(g)})}var d={a:Jb};M++;e.monitorRunDependencies&&e.monitorRunDependencies(M);if(e.instantiateWasm)try{return e.instantiateWasm(d,a)}catch(f){return E("Module.instantiateWasm callback failed with error: "+f),!1}(function(){if(F||"function"!==
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+var La=e.___wasm_call_ctors=function(){return(La=e.___wasm_call_ctors=e.asm.s).apply(null,arguments)},Y=e._free=function(){return(Y=e._free=e.asm.t).apply(null,arguments)},Ib=e._malloc=function(){return(Ib=e._malloc=e.asm.u).apply(null,arguments)},wb=e.___getTypeName=function(){return(wb=e.___getTypeName=e.asm.v).apply(null,arguments)};e.___embind_register_native_and_builtin_types=function(){return(e.___embind_register_native_and_builtin_types=e.asm.w).apply(null,arguments)};
+e.dynCall_ii=function(){return(e.dynCall_ii=e.asm.x).apply(null,arguments)};e.dynCall_vi=function(){return(e.dynCall_vi=e.asm.y).apply(null,arguments)};e.dynCall_iii=function(){return(e.dynCall_iii=e.asm.z).apply(null,arguments)};e.dynCall_viii=function(){return(e.dynCall_viii=e.asm.A).apply(null,arguments)};e.dynCall_vii=function(){return(e.dynCall_vii=e.asm.B).apply(null,arguments)};e.dynCall_i=function(){return(e.dynCall_i=e.asm.C).apply(null,arguments)};
+e.dynCall_v=function(){return(e.dynCall_v=e.asm.D).apply(null,arguments)};e.dynCall_iiii=function(){return(e.dynCall_iiii=e.asm.E).apply(null,arguments)};e.dynCall_iiiiiii=function(){return(e.dynCall_iiiiiii=e.asm.F).apply(null,arguments)};e.dynCall_viiii=function(){return(e.dynCall_viiii=e.asm.G).apply(null,arguments)};e.dynCall_viiiiii=function(){return(e.dynCall_viiiiii=e.asm.H).apply(null,arguments)};e.dynCall_viiiii=function(){return(e.dynCall_viiiii=e.asm.I).apply(null,arguments)};
+e.dynCall_viiiiiiiii=function(){return(e.dynCall_viiiiiiiii=e.asm.J).apply(null,arguments)};e.dynCall_jiiii=function(){return(e.dynCall_jiiii=e.asm.K).apply(null,arguments)};e.asm=Kb;var Lb;e.then=function(a){if(Lb)a(e);else{var b=e.onRuntimeInitialized;e.onRuntimeInitialized=function(){b&&b();a(e)}}return e};N=function Mb(){Lb||Nb();Lb||(N=Mb)};
+function Nb(){function a(){if(!Lb&&(Lb=!0,e.calledRun=!0,!ka)){Aa(Ca);Aa(Da);if(e.onRuntimeInitialized)e.onRuntimeInitialized();if(e.postRun)for("function"==typeof e.postRun&&(e.postRun=[e.postRun]);e.postRun.length;){var b=e.postRun.shift();Ea.unshift(b)}Aa(Ea)}}if(!(0<M)){if(e.preRun)for("function"==typeof e.preRun&&(e.preRun=[e.preRun]);e.preRun.length;)Fa();Aa(Ba);0<M||(e.setStatus?(e.setStatus("Running..."),setTimeout(function(){setTimeout(function(){e.setStatus("")},1);a()},1)):a())}}
+e.run=Nb;if(e.preInit)for("function"==typeof e.preInit&&(e.preInit=[e.preInit]);0<e.preInit.length;)e.preInit.pop()();noExitRuntime=!0;Nb();
+
+
+  return webp_dec
+}
+);
+})();
+if (typeof exports === 'object' && typeof module === 'object')
+      module.exports = webp_dec;
+    else if (typeof define === 'function' && define['amd'])
+      define([], function() { return webp_dec; });
+    else if (typeof exports === 'object')
+      exports["webp_dec"] = webp_dec;
+    

codecs/webp_enc/README.md

@@ -0,0 +1,26 @@
+# WebP encoder
+
+- Source: <https://github.com/webmproject/libwebp>
+- Version: v1.0.2
+
+## Dependencies
+
+- Docker
+
+## Example
+
+See `example.html`
+
+## API
+
+### `int version()`
+
+Returns the version of libwebp as a number. va.b.c is encoded as 0x0a0b0c
+
+### `UInt8Array encode(uint8_t* image_buffer, int image_width, int image_height, WebPConfig config)`
+
+Encodes the given image with given dimension to WebP.
+
+### `void free_result()`
+
+Frees the last result created by `encode()`.

codecs/webp_enc/build.sh

@@ -0,0 +1,62 @@
+#!/bin/bash
+
+set -e
+
+export OPTIMIZE="-Os"
+export LDFLAGS="${OPTIMIZE}"
+export CFLAGS="${OPTIMIZE}"
+export CPPFLAGS="${OPTIMIZE}"
+
+apt-get update
+apt-get install -qqy autoconf libtool libpng-dev pkg-config
+
+echo "============================================="
+echo "Compiling libwebp"
+echo "============================================="
+test -n "$SKIP_LIBWEBP" || (
+  cd node_modules/libwebp
+  autoreconf -fiv
+  rm -rf build || true
+  mkdir -p build && cd build
+  emconfigure ../configure \
+    --disable-libwebpdemux \
+    --disable-wic \
+    --disable-gif \
+    --disable-tiff \
+    --disable-jpeg \
+    --disable-png \
+    --disable-sdl \
+    --disable-gl \
+    --disable-threading \
+    --disable-neon-rtcd \
+    --disable-neon \
+    --disable-sse2 \
+    --disable-sse4.1
+  emmake make -j`nproc`
+)
+echo "============================================="
+echo "Compiling wasm bindings"
+echo "============================================="
+(
+  emcc \
+    ${OPTIMIZE} \
+    --closure 1 \
+    --bind \
+    -s ALLOW_MEMORY_GROWTH=1 \
+    -s MODULARIZE=1 \
+    -s 'EXPORT_NAME="webp_enc"' \
+    --std=c++11 \
+    -I node_modules/libwebp \
+    -o ./webp_enc.js \
+    -x c++ \
+    webp_enc.cpp \
+    node_modules/libwebp/build/src/.libs/libwebp.a
+)
+echo "============================================="
+echo "Compiling wasm bindings done"
+echo "============================================="
+
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo "Did you update your docker image?"
+echo "Run \`docker pull trzeci/emscripten-upstream\`"
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"

codecs/webp_enc/example.html

@@ -0,0 +1,62 @@
+<!doctype html>
+<script src='webp_enc.js'></script>
+<script>
+  const module = webp_enc();
+
+  async function loadImage(src) {
+    // Load image
+    const img = document.createElement('img');
+    img.src = src;
+    await new Promise(resolve => img.onload = resolve);
+    // Make canvas same size as image
+    const canvas = document.createElement('canvas');
+    [canvas.width, canvas.height] = [img.width, img.height];
+    // Draw image onto canvas
+    const ctx = canvas.getContext('2d');
+    ctx.drawImage(img, 0, 0);
+    return ctx.getImageData(0, 0, img.width, img.height);
+  }
+
+  module.onRuntimeInitialized = async _ => {
+    console.log('Version:', module.version().toString(16));
+    const image = await loadImage('../example.png');
+    const result = module.encode(image.data, image.width, image.height, {
+      quality: 75,
+      target_size: 0,
+      target_PSNR: 0,
+      method: 4,
+      sns_strength: 50,
+      filter_strength: 60,
+      filter_sharpness: 0,
+      filter_type: 1,
+      partitions: 0,
+      segments: 4,
+      pass: 1,
+      show_compressed: 0,
+      preprocessing: 0,
+      autofilter: 0,
+      partition_limit: 0,
+      alpha_compression: 1,
+      alpha_filtering: 1,
+      alpha_quality: 100,
+      lossless: 0,
+      exact: 0,
+      image_hint: 0,
+      emulate_jpeg_size: 0,
+      thread_level: 0,
+      low_memory: 0,
+      near_lossless: 100,
+      use_delta_palette: 0,
+      use_sharp_yuv: 0,
+    });
+    console.log('size', result.length);
+    const blob = new Blob([result], {type: 'image/webp'});
+
+    module.free_result();
+
+    const blobURL = URL.createObjectURL(blob);
+    const img = document.createElement('img');
+    img.src = blobURL;
+    document.body.appendChild(img);
+  };
+</script>

codecs/webp_enc/package.json

@@ -0,0 +1,13 @@
+{
+  "name": "webp_enc",
+  "scripts": {
+    "install": "napa",
+    "build": "docker run --rm -v $(pwd):/src trzeci/emscripten-upstream ./build.sh"
+  },
+  "napa": {
+    "libwebp": "webmproject/libwebp#v1.0.2"
+  },
+  "devDependencies": {
+    "napa": "3.0.0"
+  }
+}

codecs/webp_enc/webp_enc.cpp

@@ -0,0 +1,96 @@
+#include <emscripten/bind.h>
+#include <emscripten/val.h>
+#include "src/webp/encode.h"
+#include <stdlib.h>
+#include <string.h>
+#include <stdexcept>
+
+using namespace emscripten;
+
+int version() {
+  return WebPGetEncoderVersion();
+}
+
+uint8_t* last_result;
+
+val encode(std::string img, int width, int height, WebPConfig config) {
+  uint8_t* img_in = (uint8_t*) img.c_str();
+
+  // A lot of this is duplicated from Encode in picture_enc.c
+  WebPPicture pic;
+  WebPMemoryWriter wrt;
+  int ok;
+
+  if (!WebPPictureInit(&pic)) {
+    // shouldn't happen, except if system installation is broken
+    throw std::runtime_error("Unexpected error");
+  }
+
+  // Only use use_argb if we really need it, as it's slower.
+  pic.use_argb = config.lossless || config.use_sharp_yuv || config.preprocessing > 0;
+  pic.width = width;
+  pic.height = height;
+  pic.writer = WebPMemoryWrite;
+  pic.custom_ptr = &wrt;
+
+  WebPMemoryWriterInit(&wrt);
+
+  ok = WebPPictureImportRGBA(&pic, (uint8_t*) img_in, width * 4) && WebPEncode(&config, &pic);
+  WebPPictureFree(&pic);
+  if (!ok) {
+    WebPMemoryWriterClear(&wrt);
+    throw std::runtime_error("Encode failed");
+  }
+
+  last_result = wrt.mem;
+
+  return val(typed_memory_view(wrt.size, wrt.mem));
+}
+
+void free_result() {
+  WebPFree(last_result);
+}
+
+
+EMSCRIPTEN_BINDINGS(my_module) {
+  enum_<WebPImageHint>("WebPImageHint")
+    .value("WEBP_HINT_DEFAULT", WebPImageHint::WEBP_HINT_DEFAULT)
+    .value("WEBP_HINT_PICTURE", WebPImageHint::WEBP_HINT_PICTURE)
+    .value("WEBP_HINT_PHOTO", WebPImageHint::WEBP_HINT_PHOTO)
+    .value("WEBP_HINT_GRAPH", WebPImageHint::WEBP_HINT_GRAPH)
+    ;
+
+  value_object<WebPConfig>("WebPConfig")
+    .field("lossless", &WebPConfig::lossless)
+    .field("quality", &WebPConfig::quality)
+    .field("method", &WebPConfig::method)
+    .field("image_hint", &WebPConfig::image_hint)
+    .field("target_size", &WebPConfig::target_size)
+    .field("target_PSNR", &WebPConfig::target_PSNR)
+    .field("segments", &WebPConfig::segments)
+    .field("sns_strength", &WebPConfig::sns_strength)
+    .field("filter_strength", &WebPConfig::filter_strength)
+    .field("filter_sharpness", &WebPConfig::filter_sharpness)
+    .field("filter_type", &WebPConfig::filter_type)
+    .field("autofilter", &WebPConfig::autofilter)
+    .field("alpha_compression", &WebPConfig::alpha_compression)
+    .field("alpha_filtering", &WebPConfig::alpha_filtering)
+    .field("alpha_quality", &WebPConfig::alpha_quality)
+    .field("pass", &WebPConfig::pass)
+    .field("show_compressed", &WebPConfig::show_compressed)
+    .field("preprocessing", &WebPConfig::preprocessing)
+    .field("partitions", &WebPConfig::partitions)
+    .field("partition_limit", &WebPConfig::partition_limit)
+    .field("emulate_jpeg_size", &WebPConfig::emulate_jpeg_size)
+    .field("thread_level", &WebPConfig::thread_level)
+    .field("low_memory", &WebPConfig::low_memory)
+    .field("near_lossless", &WebPConfig::near_lossless)
+    .field("exact", &WebPConfig::exact)
+    .field("use_delta_palette", &WebPConfig::use_delta_palette)
+    .field("use_sharp_yuv", &WebPConfig::use_sharp_yuv)
+    ;
+
+  function("version", &version);
+  function("encode", &encode);
+  function("free_result", &free_result);
+}

codecs/webp_enc/webp_enc.d.ts

@@ -0,0 +1,9 @@
+import { EncodeOptions } from '../../src/codecs/webp/encoder-meta';
+
+interface WebPModule extends EmscriptenWasm.Module {
+  encode(data: BufferSource, width: number, height: number, options: EncodeOptions): Uint8Array;
+  free_result(): void;
+}
+
+
+export default function(opts: EmscriptenWasm.ModuleOpts): WebPModule;

codecs/webp_enc/webp_enc.js

@@ -0,0 +1,72 @@
+
+var webp_enc = (function() {
+  var _scriptDir = typeof document !== 'undefined' && document.currentScript ? document.currentScript.src : undefined;
+  if (typeof __filename !== 'undefined') _scriptDir = _scriptDir || __filename;
+  return (
+function(webp_enc) {
+  webp_enc = webp_enc || {};
+
+var c;c||(c=typeof webp_enc !== 'undefined' ? webp_enc : {});var u={},w;for(w in c)c.hasOwnProperty(w)&&(u[w]=c[w]);var x=!1,y=!1,aa=!1,ba=!1;x="object"===typeof window;y="function"===typeof importScripts;aa="object"===typeof process&&"object"===typeof process.versions&&"string"===typeof process.versions.node;ba=!x&&!aa&&!y;var z="",B,C,ca,da;
+if(aa)z=y?require("path").dirname(z)+"/":__dirname+"/",B=function(a,b){ca||(ca=require("fs"));da||(da=require("path"));a=da.normalize(a);return ca.readFileSync(a,b?null:"utf8")},C=function(a){a=B(a,!0);a.buffer||(a=new Uint8Array(a));a.buffer||D("Assertion failed: undefined");return a},1<process.argv.length&&process.argv[1].replace(/\\/g,"/"),process.argv.slice(2),process.on("uncaughtException",function(a){throw a;}),process.on("unhandledRejection",D),c.inspect=function(){return"[Emscripten Module object]"};
+else if(ba)"undefined"!=typeof read&&(B=function(a){return read(a)}),C=function(a){if("function"===typeof readbuffer)return new Uint8Array(readbuffer(a));a=read(a,"binary");"object"===typeof a||D("Assertion failed: undefined");return a},"undefined"!==typeof print&&("undefined"===typeof console&&(console={}),console.log=print,console.warn=console.error="undefined"!==typeof printErr?printErr:print);else if(x||y)y?z=self.location.href:document.currentScript&&(z=document.currentScript.src),_scriptDir&&
+(z=_scriptDir),0!==z.indexOf("blob:")?z=z.substr(0,z.lastIndexOf("/")+1):z="",B=function(a){var b=new XMLHttpRequest;b.open("GET",a,!1);b.send(null);return b.responseText},y&&(C=function(a){var b=new XMLHttpRequest;b.open("GET",a,!1);b.responseType="arraybuffer";b.send(null);return new Uint8Array(b.response)});var ea=c.print||console.log.bind(console),E=c.printErr||console.warn.bind(console);for(w in u)u.hasOwnProperty(w)&&(c[w]=u[w]);u=null;var F;c.wasmBinary&&(F=c.wasmBinary);var noExitRuntime;
+c.noExitRuntime&&(noExitRuntime=c.noExitRuntime);"object"!==typeof WebAssembly&&E("no native wasm support detected");var G,fa=new WebAssembly.Table({initial:225,maximum:225,element:"anyfunc"}),ha=!1,ia="undefined"!==typeof TextDecoder?new TextDecoder("utf8"):void 0;
+function ja(a,b,d){var e=I;if(0<d){d=b+d-1;for(var f=0;f<a.length;++f){var g=a.charCodeAt(f);if(55296<=g&&57343>=g){var n=a.charCodeAt(++f);g=65536+((g&1023)<<10)|n&1023}if(127>=g){if(b>=d)break;e[b++]=g}else{if(2047>=g){if(b+1>=d)break;e[b++]=192|g>>6}else{if(65535>=g){if(b+2>=d)break;e[b++]=224|g>>12}else{if(b+3>=d)break;e[b++]=240|g>>18;e[b++]=128|g>>12&63}e[b++]=128|g>>6&63}e[b++]=128|g&63}}e[b]=0}}var ka="undefined"!==typeof TextDecoder?new TextDecoder("utf-16le"):void 0;
+function la(a){var b;for(b=a>>1;J[b];)++b;b<<=1;if(32<b-a&&ka)return ka.decode(I.subarray(a,b));b=0;for(var d="";;){var e=J[a+2*b>>1];if(0==e)return d;++b;d+=String.fromCharCode(e)}}function ma(a,b,d){void 0===d&&(d=2147483647);if(2>d)return 0;d-=2;var e=b;d=d<2*a.length?d/2:a.length;for(var f=0;f<d;++f)J[b>>1]=a.charCodeAt(f),b+=2;J[b>>1]=0;return b-e}function na(a){return 2*a.length}
+function oa(a){for(var b=0,d="";;){var e=K[a+4*b>>2];if(0==e)return d;++b;65536<=e?(e-=65536,d+=String.fromCharCode(55296|e>>10,56320|e&1023)):d+=String.fromCharCode(e)}}function pa(a,b,d){void 0===d&&(d=2147483647);if(4>d)return 0;var e=b;d=e+d-4;for(var f=0;f<a.length;++f){var g=a.charCodeAt(f);if(55296<=g&&57343>=g){var n=a.charCodeAt(++f);g=65536+((g&1023)<<10)|n&1023}K[b>>2]=g;b+=4;if(b+4>d)break}K[b>>2]=0;return b-e}
+function qa(a){for(var b=0,d=0;d<a.length;++d){var e=a.charCodeAt(d);55296<=e&&57343>=e&&++d;b+=4}return b}var L,ra,I,J,sa,K,M,ta,ua;function va(a){L=a;c.HEAP8=ra=new Int8Array(a);c.HEAP16=J=new Int16Array(a);c.HEAP32=K=new Int32Array(a);c.HEAPU8=I=new Uint8Array(a);c.HEAPU16=sa=new Uint16Array(a);c.HEAPU32=M=new Uint32Array(a);c.HEAPF32=ta=new Float32Array(a);c.HEAPF64=ua=new Float64Array(a)}var wa=c.INITIAL_MEMORY||16777216;c.wasmMemory?G=c.wasmMemory:G=new WebAssembly.Memory({initial:wa/65536});
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+var Ia=c.___wasm_call_ctors=function(){return(Ia=c.___wasm_call_ctors=c.asm.x).apply(null,arguments)},nb=c._malloc=function(){return(nb=c._malloc=c.asm.y).apply(null,arguments)},X=c._free=function(){return(X=c._free=c.asm.z).apply(null,arguments)},cb=c.___getTypeName=function(){return(cb=c.___getTypeName=c.asm.A).apply(null,arguments)};c.___embind_register_native_and_builtin_types=function(){return(c.___embind_register_native_and_builtin_types=c.asm.B).apply(null,arguments)};
+c.dynCall_iiii=function(){return(c.dynCall_iiii=c.asm.C).apply(null,arguments)};c.dynCall_ii=function(){return(c.dynCall_ii=c.asm.D).apply(null,arguments)};c.dynCall_i=function(){return(c.dynCall_i=c.asm.E).apply(null,arguments)};c.dynCall_viiiii=function(){return(c.dynCall_viiiii=c.asm.F).apply(null,arguments)};c.dynCall_v=function(){return(c.dynCall_v=c.asm.G).apply(null,arguments)};c.dynCall_vi=function(){return(c.dynCall_vi=c.asm.H).apply(null,arguments)};
+c.dynCall_iii=function(){return(c.dynCall_iii=c.asm.I).apply(null,arguments)};c.dynCall_viii=function(){return(c.dynCall_viii=c.asm.J).apply(null,arguments)};c.dynCall_fii=function(){return(c.dynCall_fii=c.asm.K).apply(null,arguments)};c.dynCall_viif=function(){return(c.dynCall_viif=c.asm.L).apply(null,arguments)};c.dynCall_iiiiii=function(){return(c.dynCall_iiiiii=c.asm.M).apply(null,arguments)};c.dynCall_viiii=function(){return(c.dynCall_viiii=c.asm.N).apply(null,arguments)};
+c.dynCall_viiiiii=function(){return(c.dynCall_viiiiii=c.asm.O).apply(null,arguments)};c.dynCall_iiiiiii=function(){return(c.dynCall_iiiiiii=c.asm.P).apply(null,arguments)};c.dynCall_viiiiiiiii=function(){return(c.dynCall_viiiiiiiii=c.asm.Q).apply(null,arguments)};c.dynCall_jiiii=function(){return(c.dynCall_jiiii=c.asm.R).apply(null,arguments)};c.dynCall_diiii=function(){return(c.dynCall_diiii=c.asm.S).apply(null,arguments)};
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+c.then=function(a){if(Z)a(c);else{var b=c.onRuntimeInitialized;c.onRuntimeInitialized=function(){b&&b();a(c)}}return c};O=function qb(){Z||rb();Z||(O=qb)};
+function rb(){function a(){if(!Z&&(Z=!0,c.calledRun=!0,!ha)){xa(za);xa(Aa);if(c.onRuntimeInitialized)c.onRuntimeInitialized();if(c.postRun)for("function"==typeof c.postRun&&(c.postRun=[c.postRun]);c.postRun.length;){var b=c.postRun.shift();Ba.unshift(b)}xa(Ba)}}if(!(0<N)){if(c.preRun)for("function"==typeof c.preRun&&(c.preRun=[c.preRun]);c.preRun.length;)Ca();xa(ya);0<N||(c.setStatus?(c.setStatus("Running..."),setTimeout(function(){setTimeout(function(){c.setStatus("")},1);a()},1)):a())}}c.run=rb;
+if(c.preInit)for("function"==typeof c.preInit&&(c.preInit=[c.preInit]);0<c.preInit.length;)c.preInit.pop()();noExitRuntime=!0;rb();
+
+
+  return webp_enc
+}
+);
+})();
+if (typeof exports === 'object' && typeof module === 'object')
+      module.exports = webp_enc;
+    else if (typeof define === 'function' && define['amd'])
+      define([], function() { return webp_enc; });
+    else if (typeof exports === 'object')
+      exports["webp_enc"] = webp_enc;
+    

config/add-css-types.js

@@ -0,0 +1,74 @@
+const DtsCreator = require('typed-css-modules');
+const chokidar = require('chokidar');
+const util = require('util');
+const sass = require('node-sass');
+
+const sassRender = util.promisify(sass.render);
+
+async function sassToCss(path) {
+  const result = await sassRender({ file: path });
+  return result.css;
+}
+
+/**
+ * @typedef {Object} Opts
+ * @property {boolean} watch Watch for changes
+ */
+/**
+ * Create typing files for CSS & SCSS.
+ *
+ * @param {string[]} rootPaths Paths to search within
+ * @param {Opts} [opts={}] Options.
+ */
+function addCssTypes(rootPaths, opts = {}) {
+  return new Promise((resolve) => {
+    const { watch = false } = opts;
+
+    const paths = [];
+    const preReadyPromises = [];
+    let ready = false;
+
+    for (const rootPath of rootPaths) {
+      // Look for scss & css in each path.
+      paths.push(rootPath + '/**/*.scss');
+      paths.push(rootPath + '/**/*.css');
+    }
+
+    // For simplicity, the watcher is used even if we're not watching.
+    // If we're not watching, we stop the watcher after the initial files are found.
+    const watcher = chokidar.watch(paths, {
+      // Avoid processing already-processed files.
+      ignored: '*.d.*',
+      // Without this, travis and netlify builds never complete. I'm not sure why, but it might be
+      // related to https://github.com/paulmillr/chokidar/pull/758
+      persistent: watch,
+    });
+
+    function change(path) {
+      const promise = (async function() {
+        const creator = new DtsCreator({ camelCase: true });
+        const result = path.endsWith('.scss') ?
+          await creator.create(path, await sassToCss(path)) :
+          await creator.create(path);
+
+        await result.writeFile();
+      })();
+
+      if (!ready) preReadyPromises.push(promise);
+    }
+
+    watcher.on('change', change);
+    watcher.on('add', change);
+
+    // 'ready' is when events have been fired for file discovery.
+    watcher.on('ready', () => {
+      ready = true;
+      // Wait for the current set of processing to finish.
+      Promise.all(preReadyPromises).then(resolve);
+      // And if we're not watching, close the watcher.
+      if (!watch) watcher.close();
+    });
+  })
+}
+
+module.exports = addCssTypes;