1.10.1

Closure all the things

.babelrc

@@ -1,31 +0,0 @@
-{
-	"presets": [
-		[
-			"env",
-			{
-				"loose": true,
-				"uglify": false,
-				"modules": false,
-				"targets": {
-					"browsers": "last 2 versions"
-				},
-				"exclude": [
-					"transform-regenerator",
-					"transform-es2015-typeof-symbol"
-				]
-			}
-		]
-	],
-	"plugins": [
-		"transform-decorators-legacy",
-		"transform-class-properties",
-		"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
+[Squoosh] is an image compression web app that allows you to dive into the advanced options provided
-advanced options provided by various image compressors.
+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 +1,45 @@
+#!/bin/bash
+
+set -e
+
+export OPTIMIZE="-Os"
+export LDFLAGS="${OPTIMIZE}"
+export CFLAGS="${OPTIMIZE}"
+export CPPFLAGS="${OPTIMIZE}"
+
+echo "============================================="
+echo "Compiling libimagequant"
+echo "============================================="
+(
+  emcc \
+    ${OPTIMIZE} \
+    -I node_modules/libimagequant \
+    --std=c99 \
+    -c \
+    node_modules/libimagequant/{libimagequant,pam,mediancut,blur,mempool,kmeans,nearest}.c
+)
+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 *.o \
+    -x c++ \
+    imagequant.cpp
+)
+echo "============================================="
+echo "Compiling wasm module done"
+echo "============================================="
+
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo "Did you update your docker image?"
+echo "Run \`docker pull trzeci/emscripten\`"
+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[] = {
+  {.a = 255, .r = 0, .g = 0, .b = 0},       // regular black
+  {.a = 255, .r = 0, .g = 0, .b = 215},     // regular blue
+  {.a = 255, .r = 215, .g = 0, .b = 0},     // regular red
+  {.a = 255, .r = 215, .g = 0, .b = 215},   // regular magenta
+  {.a = 255, .r = 0, .g = 215, .b = 0},     // regular green
+  {.a = 255, .r = 0, .g = 215, .b = 215},   // regular cyan
+  {.a = 255, .r = 215, .g = 215, .b = 0},   // regular yellow
+  {.a = 255, .r = 215, .g = 215, .b = 215}, // regular white
+  {.a = 255, .r = 0, .g = 0, .b = 255},     // bright blue
+  {.a = 255, .r = 255, .g = 0, .b = 0},     // bright red
+  {.a = 255, .r = 255, .g = 0, .b = 255},   // bright magenta
+  {.a = 255, .r = 0, .g = 255, .b = 0},     // bright green
+  {.a = 255, .r = 0, .g = 255, .b = 255},   // bright cyan
+  {.a = 255, .r = 255, .g = 255, .b = 0},   // bright yellow
+  {.a = 255, .r = 255, .g = 255, .b = 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 m={},r;for(r in e)e.hasOwnProperty(r)&&(m[r]=e[r]);var u=!1,v=!1,aa=!1,ba=!1,ca=!1;u="object"===typeof window;v="function"===typeof importScripts;aa=(ba="object"===typeof process&&"object"===typeof process.versions&&"string"===typeof process.versions.node)&&!u&&!v;ca=!u&&!aa&&!v;var w="",da,x,ea,fa;
+if(aa)w=__dirname+"/",da=function(a,b){ea||(ea=require("fs"));fa||(fa=require("path"));a=fa.normalize(a);return ea.readFileSync(a,b?null:"utf8")},x=function(a){a=da(a,!0);a.buffer||(a=new Uint8Array(a));a.buffer||y("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",y),e.inspect=function(){return"[Emscripten Module object]"};else if(ca)"undefined"!=
+typeof read&&(da=function(a){return read(a)}),x=function(a){if("function"===typeof readbuffer)return new Uint8Array(readbuffer(a));a=read(a,"binary");"object"===typeof a||y("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(u||v)v?w=self.location.href:document.currentScript&&(w=document.currentScript.src),_scriptDir&&(w=_scriptDir),0!==w.indexOf("blob:")?
+w=w.substr(0,w.lastIndexOf("/")+1):w="",da=function(a){var b=new XMLHttpRequest;b.open("GET",a,!1);b.send(null);return b.responseText},v&&(x=function(a){var b=new XMLHttpRequest;b.open("GET",a,!1);b.responseType="arraybuffer";b.send(null);return new Uint8Array(b.response)});var ha=e.print||console.log.bind(console),z=e.printErr||console.warn.bind(console);for(r in m)m.hasOwnProperty(r)&&(e[r]=m[r]);m=null;var ia={"f64-rem":function(a,b){return a%b},"debugger":function(){}},A;e.wasmBinary&&(A=e.wasmBinary);
+"object"!==typeof WebAssembly&&z("no native wasm support detected");var B,ja=new WebAssembly.Table({initial:79,maximum:79,element:"anyfunc"}),ka=!1,la="undefined"!==typeof TextDecoder?new TextDecoder("utf8"):void 0;
+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 h=a[b++]&63;if(192==(f&224))d+=String.fromCharCode((f&31)<<6|h);else{var g=a[b++]&63;f=224==(f&240)?(f&15)<<12|h<<6|g:(f&7)<<18|h<<12|g<<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){return a?ma(C,a,void 0):""}
+function oa(a,b,c){var d=C;if(0<c){c=b+c-1;for(var f=0;f<a.length;++f){var h=a.charCodeAt(f);if(55296<=h&&57343>=h){var g=a.charCodeAt(++f);h=65536+((h&1023)<<10)|g&1023}if(127>=h){if(b>=c)break;d[b++]=h}else{if(2047>=h){if(b+1>=c)break;d[b++]=192|h>>6}else{if(65535>=h){if(b+2>=c)break;d[b++]=224|h>>12}else{if(b+3>=c)break;d[b++]=240|h>>18;d[b++]=128|h>>12&63}d[b++]=128|h>>6&63}d[b++]=128|h&63}}d[b]=0}}"undefined"!==typeof TextDecoder&&new TextDecoder("utf-16le");
+function pa(a){0<a%65536&&(a+=65536-a%65536);return a}var buffer,qa,C,ra,sa,D,E,ta,ua;function va(a){buffer=a;e.HEAP8=qa=new Int8Array(a);e.HEAP16=ra=new Int16Array(a);e.HEAP32=D=new Int32Array(a);e.HEAPU8=C=new Uint8Array(a);e.HEAPU16=sa=new Uint16Array(a);e.HEAPU32=E=new Uint32Array(a);e.HEAPF32=ta=new Float32Array(a);e.HEAPF64=ua=new Float64Array(a)}var wa=e.TOTAL_MEMORY||16777216;e.wasmMemory?B=e.wasmMemory:B=new WebAssembly.Memory({initial:wa/65536});B&&(buffer=B.buffer);wa=buffer.byteLength;
+va(buffer);D[2092]=5251440;function xa(a){for(;0<a.length;){var b=a.shift();if("function"==typeof b)b();else{var c=b.Aa;"number"===typeof c?void 0===b.ra?e.dynCall_v(c):e.dynCall_vi(c,b.ra):c(void 0===b.ra?null:b.ra)}}}var ya=[],za=[],Aa=[],Ba=[];function Ca(){var a=e.preRun.shift();ya.unshift(a)}var G=0,Da=null,H=null;e.preloadedImages={};e.preloadedAudios={};
+function y(a){if(e.onAbort)e.onAbort(a);ha(a);z(a);ka=!0;throw new WebAssembly.RuntimeError("abort("+a+"). Build with -s ASSERTIONS=1 for more info.");}function Ea(){var a=I;return String.prototype.startsWith?a.startsWith("data:application/octet-stream;base64,"):0===a.indexOf("data:application/octet-stream;base64,")}var I="imagequant.wasm";if(!Ea()){var Fa=I;I=e.locateFile?e.locateFile(Fa,w):w+Fa}
+function Ga(){try{if(A)return new Uint8Array(A);if(x)return x(I);throw"both async and sync fetching of the wasm failed";}catch(a){y(a)}}function Ha(){return A||!u&&!v||"function"!==typeof fetch?new Promise(function(a){a(Ga())}):fetch(I,{credentials:"same-origin"}).then(function(a){if(!a.ok)throw"failed to load wasm binary file at '"+I+"'";return a.arrayBuffer()}).catch(function(){return Ga()})}
+e.asm=function(){function a(a){e.asm=a.exports;G--;e.monitorRunDependencies&&e.monitorRunDependencies(G);0==G&&(null!==Da&&(clearInterval(Da),Da=null),H&&(a=H,H=null,a()))}function b(b){a(b.instance)}function c(a){return Ha().then(function(a){return WebAssembly.instantiate(a,d)}).then(a,function(a){z("failed to asynchronously prepare wasm: "+a);y(a)})}var d={env:Ia,wasi_unstable:Ia,global:{NaN:NaN,Infinity:Infinity},"global.Math":Math,asm2wasm:ia};G++;e.monitorRunDependencies&&e.monitorRunDependencies(G);
+if(e.instantiateWasm)try{return e.instantiateWasm(d,a)}catch(f){return z("Module.instantiateWasm callback failed with error: "+f),!1}(function(){if(A||"function"!==typeof WebAssembly.instantiateStreaming||Ea()||"function"!==typeof fetch)return c(b);fetch(I,{credentials:"same-origin"}).then(function(a){return WebAssembly.instantiateStreaming(a,d).then(b,function(a){z("wasm streaming compile failed: "+a);z("falling back to ArrayBuffer instantiation");c(b)})})})();return{}};za.push({Aa:function(){Ja()}});
+var Ka=[null,[],[]];function La(){return 0}function Ma(){return 0}function Na(a,b,c,d){try{for(var f=0,h=0;h<c;h++){for(var g=D[b+8*h>>2],k=D[b+(8*h+4)>>2],p=0;p<k;p++){var q=C[g+p],l=Ka[a];0===q||10===q?((1===a?ha:z)(ma(l,0)),l.length=0):l.push(q)}f+=k}D[d>>2]=f;return 0}catch(t){return"undefined"!==typeof FS&&t instanceof FS.Ia||y(t),t.Ja}}function Oa(a){switch(a){case 1:return 0;case 2:return 1;case 4:return 2;case 8:return 3;default:throw new TypeError("Unknown type size: "+a);}}var Pa=void 0;
+function J(a){for(var b="";C[a];)b+=Pa[C[a++]];return b}var K={},L={},Qa={};function Ra(a){if(void 0===a)return"_unknown";a=a.replace(/[^a-zA-Z0-9_]/g,"$");var b=a.charCodeAt(0);return 48<=b&&57>=b?"_"+a:a}function Sa(a,b){a=Ra(a);return(new Function("body","return function "+a+'() {\n    "use strict";    return body.apply(this, arguments);\n};\n'))(b)}
+function Ta(a){var b=Error,c=Sa(a,function(b){this.name=a;this.message=b;b=Error(b).stack;void 0!==b&&(this.stack=this.toString()+"\n"+b.replace(/^Error(:[^\n]*)?\n/,""))});c.prototype=Object.create(b.prototype);c.prototype.constructor=c;c.prototype.toString=function(){return void 0===this.message?this.name:this.name+": "+this.message};return c}var M=void 0;function N(a){throw new M(a);}var Ua=void 0;function Va(a){throw new Ua(a);}
+function Wa(a,b,c){function d(b){b=c(b);b.length!==a.length&&Va("Mismatched type converter count");for(var d=0;d<a.length;++d)Q(a[d],b[d])}a.forEach(function(a){Qa[a]=b});var f=Array(b.length),h=[],g=0;b.forEach(function(a,b){L.hasOwnProperty(a)?f[b]=L[a]:(h.push(a),K.hasOwnProperty(a)||(K[a]=[]),K[a].push(function(){f[b]=L[a];++g;g===h.length&&d(f)}))});0===h.length&&d(f)}
+function Q(a,b,c){c=c||{};if(!("argPackAdvance"in b))throw new TypeError("registerType registeredInstance requires argPackAdvance");var d=b.name;a||N('type "'+d+'" must have a positive integer typeid pointer');if(L.hasOwnProperty(a)){if(c.Da)return;N("Cannot register type '"+d+"' twice")}L[a]=b;delete Qa[a];K.hasOwnProperty(a)&&(b=K[a],delete K[a],b.forEach(function(a){a()}))}function Xa(a){return{count:a.count,la:a.la,na:a.na,aa:a.aa,da:a.da,ea:a.ea,fa:a.fa}}
+function Ya(a){N(a.$.da.ba.name+" instance already deleted")}var Za=!1;function $a(){}function ab(a){--a.count.value;0===a.count.value&&(a.ea?a.fa.ka(a.ea):a.da.ba.ka(a.aa))}
+function R(a){if("undefined"===typeof FinalizationGroup)return R=function(a){return a},a;Za=new FinalizationGroup(function(a){for(var b=a.next();!b.done;b=a.next())b=b.value,b.aa?ab(b):console.warn("object already deleted: "+b.aa)});R=function(a){Za.register(a,a.$,a.$);return a};$a=function(a){Za.unregister(a.$)};return R(a)}var bb=void 0,cb=[];function db(){for(;cb.length;){var a=cb.pop();a.$.la=!1;a["delete"]()}}function T(){}var eb={};
+function fb(a,b){var c=e;if(void 0===c[a].ha){var d=c[a];c[a]=function(){c[a].ha.hasOwnProperty(arguments.length)||N("Function '"+b+"' called with an invalid number of arguments ("+arguments.length+") - expects one of ("+c[a].ha+")!");return c[a].ha[arguments.length].apply(this,arguments)};c[a].ha=[];c[a].ha[d.xa]=d}}
+function gb(a,b,c){e.hasOwnProperty(a)?((void 0===c||void 0!==e[a].ha&&void 0!==e[a].ha[c])&&N("Cannot register public name '"+a+"' twice"),fb(a,a),e.hasOwnProperty(c)&&N("Cannot register multiple overloads of a function with the same number of arguments ("+c+")!"),e[a].ha[c]=b):(e[a]=b,void 0!==c&&(e[a].La=c))}function hb(a,b,c,d,f,h,g,k){this.name=a;this.constructor=b;this.ja=c;this.ka=d;this.ga=f;this.Ba=h;this.oa=g;this.za=k}
+function ib(a,b,c){for(;b!==c;)b.oa||N("Expected null or instance of "+c.name+", got an instance of "+b.name),a=b.oa(a),b=b.ga;return a}function jb(a,b){if(null===b)return this.sa&&N("null is not a valid "+this.name),0;b.$||N('Cannot pass "'+U(b)+'" as a '+this.name);b.$.aa||N("Cannot pass deleted object as a pointer of type "+this.name);return ib(b.$.aa,b.$.da.ba,this.ba)}
+function kb(a,b){if(null===b){this.sa&&N("null is not a valid "+this.name);if(this.qa){var c=this.Fa();null!==a&&a.push(this.ka,c);return c}return 0}b.$||N('Cannot pass "'+U(b)+'" as a '+this.name);b.$.aa||N("Cannot pass deleted object as a pointer of type "+this.name);!this.pa&&b.$.da.pa&&N("Cannot convert argument of type "+(b.$.fa?b.$.fa.name:b.$.da.name)+" to parameter type "+this.name);c=ib(b.$.aa,b.$.da.ba,this.ba);if(this.qa)switch(void 0===b.$.ea&&N("Passing raw pointer to smart pointer is illegal"),
+this.Ha){case 0:b.$.fa===this?c=b.$.ea:N("Cannot convert argument of type "+(b.$.fa?b.$.fa.name:b.$.da.name)+" to parameter type "+this.name);break;case 1:c=b.$.ea;break;case 2:if(b.$.fa===this)c=b.$.ea;else{var d=b.clone();c=this.Ga(c,lb(function(){d["delete"]()}));null!==a&&a.push(this.ka,c)}break;default:N("Unsupporting sharing policy")}return c}
+function ob(a,b){if(null===b)return this.sa&&N("null is not a valid "+this.name),0;b.$||N('Cannot pass "'+U(b)+'" as a '+this.name);b.$.aa||N("Cannot pass deleted object as a pointer of type "+this.name);b.$.da.pa&&N("Cannot convert argument of type "+b.$.da.name+" to parameter type "+this.name);return ib(b.$.aa,b.$.da.ba,this.ba)}function pb(a){return this.fromWireType(E[a>>2])}function qb(a,b,c){if(b===c)return a;if(void 0===c.ga)return null;a=qb(a,b,c.ga);return null===a?null:c.za(a)}var rb={};
+function sb(a,b){for(void 0===b&&N("ptr should not be undefined");a.ga;)b=a.oa(b),a=a.ga;return rb[b]}function tb(a,b){b.da&&b.aa||Va("makeClassHandle requires ptr and ptrType");!!b.fa!==!!b.ea&&Va("Both smartPtrType and smartPtr must be specified");b.count={value:1};return R(Object.create(a,{$:{value:b}}))}
+function V(a,b,c,d){this.name=a;this.ba=b;this.sa=c;this.pa=d;this.qa=!1;this.ka=this.Ga=this.Fa=this.wa=this.Ha=this.Ea=void 0;void 0!==b.ga?this.toWireType=kb:(this.toWireType=d?jb:ob,this.ia=null)}function ub(a,b,c){e.hasOwnProperty(a)||Va("Replacing nonexistant public symbol");void 0!==e[a].ha&&void 0!==c?e[a].ha[c]=b:(e[a]=b,e[a].xa=c)}
+function W(a,b){a=J(a);if(void 0!==e["FUNCTION_TABLE_"+a])var c=e["FUNCTION_TABLE_"+a][b];else if("undefined"!==typeof FUNCTION_TABLE)c=FUNCTION_TABLE[b];else{c=e["dynCall_"+a];void 0===c&&(c=e["dynCall_"+a.replace(/f/g,"d")],void 0===c&&N("No dynCall invoker for signature: "+a));for(var d=[],f=1;f<a.length;++f)d.push("a"+f);f="return function "+("dynCall_"+a+"_"+b)+"("+d.join(", ")+") {\n";f+="    return dynCall(rawFunction"+(d.length?", ":"")+d.join(", ")+");\n";c=(new Function("dynCall","rawFunction",
+f+"};\n"))(c,b)}"function"!==typeof c&&N("unknown function pointer with signature "+a+": "+b);return c}var vb=void 0;function wb(a){a=xb(a);var b=J(a);X(a);return b}function yb(a,b){function c(a){f[a]||L[a]||(Qa[a]?Qa[a].forEach(c):(d.push(a),f[a]=!0))}var d=[],f={};b.forEach(c);throw new vb(a+": "+d.map(wb).join([", "]));}function zb(a){for(;a.length;){var b=a.pop();a.pop()(b)}}
+function Ab(a,b,c){a instanceof Object||N(c+' with invalid "this": '+a);a instanceof b.ba.constructor||N(c+' incompatible with "this" of type '+a.constructor.name);a.$.aa||N("cannot call emscripten binding method "+c+" on deleted object");return ib(a.$.aa,a.$.da.ba,b.ba)}var Bb=[],Y=[{},{value:void 0},{value:null},{value:!0},{value:!1}];function Cb(a){4<a&&0===--Y[a].ta&&(Y[a]=void 0,Bb.push(a))}
+function lb(a){switch(a){case void 0:return 1;case null:return 2;case !0:return 3;case !1:return 4;default:var b=Bb.length?Bb.pop():Y.length;Y[b]={ta:1,value:a};return b}}function U(a){if(null===a)return"null";var b=typeof a;return"object"===b||"array"===b||"function"===b?a.toString():""+a}function Db(a,b){switch(b){case 2:return function(a){return this.fromWireType(ta[a>>2])};case 3:return function(a){return this.fromWireType(ua[a>>3])};default:throw new TypeError("Unknown float type: "+a);}}
+function Eb(a){var b=Function;if(!(b instanceof Function))throw new TypeError("new_ called with constructor type "+typeof b+" which is not a function");var c=Sa(b.name||"unknownFunctionName",function(){});c.prototype=b.prototype;c=new c;a=b.apply(c,a);return a instanceof Object?a:c}function Fb(a,b){for(var c=[],d=0;d<a;d++)c.push(D[(b>>2)+d]);return c}
+function Gb(a,b,c){switch(b){case 0:return c?function(a){return qa[a]}:function(a){return C[a]};case 1:return c?function(a){return ra[a>>1]}:function(a){return sa[a>>1]};case 2:return c?function(a){return D[a>>2]}:function(a){return E[a>>2]};default:throw new TypeError("Unknown integer type: "+a);}}function Hb(){return qa.length}function Z(){Z.ma||(Z.ma=[]);Z.ma.push(Ib());return Z.ma.length-1}for(var Jb=Array(256),Kb=0;256>Kb;++Kb)Jb[Kb]=String.fromCharCode(Kb);Pa=Jb;M=e.BindingError=Ta("BindingError");
+Ua=e.InternalError=Ta("InternalError");T.prototype.isAliasOf=function(a){if(!(this instanceof T&&a instanceof T))return!1;var b=this.$.da.ba,c=this.$.aa,d=a.$.da.ba;for(a=a.$.aa;b.ga;)c=b.oa(c),b=b.ga;for(;d.ga;)a=d.oa(a),d=d.ga;return b===d&&c===a};T.prototype.clone=function(){this.$.aa||Ya(this);if(this.$.na)return this.$.count.value+=1,this;var a=R(Object.create(Object.getPrototypeOf(this),{$:{value:Xa(this.$)}}));a.$.count.value+=1;a.$.la=!1;return a};
+T.prototype["delete"]=function(){this.$.aa||Ya(this);this.$.la&&!this.$.na&&N("Object already scheduled for deletion");$a(this);ab(this.$);this.$.na||(this.$.ea=void 0,this.$.aa=void 0)};T.prototype.isDeleted=function(){return!this.$.aa};T.prototype.deleteLater=function(){this.$.aa||Ya(this);this.$.la&&!this.$.na&&N("Object already scheduled for deletion");cb.push(this);1===cb.length&&bb&&bb(db);this.$.la=!0;return this};V.prototype.Ca=function(a){this.wa&&(a=this.wa(a));return a};
+V.prototype.va=function(a){this.ka&&this.ka(a)};V.prototype.argPackAdvance=8;V.prototype.readValueFromPointer=pb;V.prototype.deleteObject=function(a){if(null!==a)a["delete"]()};
+V.prototype.fromWireType=function(a){function b(){return this.qa?tb(this.ba.ja,{da:this.Ea,aa:c,fa:this,ea:a}):tb(this.ba.ja,{da:this,aa:a})}var c=this.Ca(a);if(!c)return this.va(a),null;var d=sb(this.ba,c);if(void 0!==d){if(0===d.$.count.value)return d.$.aa=c,d.$.ea=a,d.clone();d=d.clone();this.va(a);return d}d=this.ba.Ba(c);d=eb[d];if(!d)return b.call(this);d=this.pa?d.ya:d.pointerType;var f=qb(c,this.ba,d.ba);return null===f?b.call(this):this.qa?tb(d.ba.ja,{da:d,aa:f,fa:this,ea:a}):tb(d.ba.ja,
+{da:d,aa:f})};e.getInheritedInstanceCount=function(){return Object.keys(rb).length};e.getLiveInheritedInstances=function(){var a=[],b;for(b in rb)rb.hasOwnProperty(b)&&a.push(rb[b]);return a};e.flushPendingDeletes=db;e.setDelayFunction=function(a){bb=a;cb.length&&bb&&bb(db)};vb=e.UnboundTypeError=Ta("UnboundTypeError");e.count_emval_handles=function(){for(var a=0,b=5;b<Y.length;++b)void 0!==Y[b]&&++a;return a};e.get_first_emval=function(){for(var a=5;a<Y.length;++a)if(void 0!==Y[a])return Y[a];return null};
+var Ia={c:function(a,b,c,d){y("Assertion failed: "+na(a)+", at: "+[b?na(b):"unknown filename",c,d?na(d):"unknown function"])},v:function(){return La.apply(null,arguments)},r:function(){return Ma.apply(null,arguments)},q:function(){return Na.apply(null,arguments)},p:function(a,b,c,d,f){var h=Oa(c);b=J(b);Q(a,{name:b,fromWireType:function(a){return!!a},toWireType:function(a,b){return b?d:f},argPackAdvance:8,readValueFromPointer:function(a){if(1===c)var d=qa;else if(2===c)d=ra;else if(4===c)d=D;else throw new TypeError("Unknown boolean type size: "+
+b);return this.fromWireType(d[a>>h])},ia:null})},o:function(a,b,c,d,f,h,g,k,p,q,l,t,O){l=J(l);h=W(f,h);k&&(k=W(g,k));q&&(q=W(p,q));O=W(t,O);var F=Ra(l);gb(F,function(){yb("Cannot construct "+l+" due to unbound types",[d])});Wa([a,b,c],d?[d]:[],function(b){b=b[0];if(d){var c=b.ba;var f=c.ja}else f=T.prototype;b=Sa(F,function(){if(Object.getPrototypeOf(this)!==p)throw new M("Use 'new' to construct "+l);if(void 0===g.ua)throw new M(l+" has no accessible constructor");var a=g.ua[arguments.length];if(void 0===
+a)throw new M("Tried to invoke ctor of "+l+" with invalid number of parameters ("+arguments.length+") - expected ("+Object.keys(g.ua).toString()+") parameters instead!");return a.apply(this,arguments)});var p=Object.create(f,{constructor:{value:b}});b.prototype=p;var g=new hb(l,b,p,O,c,h,k,q);c=new V(l,g,!0,!1);f=new V(l+"*",g,!1,!1);var t=new V(l+" const*",g,!1,!0);eb[a]={pointerType:f,ya:t};ub(F,b);return[c,f,t]})},h:function(a,b,c,d,f,h,g,k,p,q){b=J(b);f=W(d,f);Wa([],[a],function(a){a=a[0];var d=
+a.name+"."+b,l={get:function(){yb("Cannot access "+d+" due to unbound types",[c,g])},enumerable:!0,configurable:!0};p?l.set=function(){yb("Cannot access "+d+" due to unbound types",[c,g])}:l.set=function(){N(d+" is a read-only property")};Object.defineProperty(a.ba.ja,b,l);Wa([],p?[c,g]:[c],function(c){var g=c[0],l={get:function(){var b=Ab(this,a,d+" getter");return g.fromWireType(f(h,b))},enumerable:!0};if(p){p=W(k,p);var t=c[1];l.set=function(b){var c=Ab(this,a,d+" setter"),f=[];p(q,c,t.toWireType(f,
+b));zb(f)}}Object.defineProperty(a.ba.ja,b,l);return[]});return[]})},n:function(a,b){b=J(b);Q(a,{name:b,fromWireType:function(a){var b=Y[a].value;Cb(a);return b},toWireType:function(a,b){return lb(b)},argPackAdvance:8,readValueFromPointer:pb,ia:null})},j:function(a,b,c){c=Oa(c);b=J(b);Q(a,{name:b,fromWireType:function(a){return a},toWireType:function(a,b){if("number"!==typeof b&&"boolean"!==typeof b)throw new TypeError('Cannot convert "'+U(b)+'" to '+this.name);return b},argPackAdvance:8,readValueFromPointer:Db(b,
+c),ia:null})},e:function(a,b,c,d,f,h){var g=Fb(b,c);a=J(a);f=W(d,f);gb(a,function(){yb("Cannot call "+a+" due to unbound types",g)},b-1);Wa([],g,function(c){var d=[c[0],null].concat(c.slice(1)),g=c=a,l=f,k=d.length;2>k&&N("argTypes array size mismatch! Must at least get return value and 'this' types!");for(var O=null!==d[1]&&!1,F=!1,n=1;n<d.length;++n)if(null!==d[n]&&void 0===d[n].ia){F=!0;break}var mb="void"!==d[0].name,P="",S="";for(n=0;n<k-2;++n)P+=(0!==n?", ":"")+"arg"+n,S+=(0!==n?", ":"")+"arg"+
+n+"Wired";g="return function "+Ra(g)+"("+P+") {\nif (arguments.length !== "+(k-2)+") {\nthrowBindingError('function "+g+" called with ' + arguments.length + ' arguments, expected "+(k-2)+" args!');\n}\n";F&&(g+="var destructors = [];\n");var nb=F?"destructors":"null";P="throwBindingError invoker fn runDestructors retType classParam".split(" ");l=[N,l,h,zb,d[0],d[1]];O&&(g+="var thisWired = classParam.toWireType("+nb+", this);\n");for(n=0;n<k-2;++n)g+="var arg"+n+"Wired = argType"+n+".toWireType("+
+nb+", arg"+n+"); // "+d[n+2].name+"\n",P.push("argType"+n),l.push(d[n+2]);O&&(S="thisWired"+(0<S.length?", ":"")+S);g+=(mb?"var rv = ":"")+"invoker(fn"+(0<S.length?", ":"")+S+");\n";if(F)g+="runDestructors(destructors);\n";else for(n=O?1:2;n<d.length;++n)k=1===n?"thisWired":"arg"+(n-2)+"Wired",null!==d[n].ia&&(g+=k+"_dtor("+k+"); // "+d[n].name+"\n",P.push(k+"_dtor"),l.push(d[n].ia));mb&&(g+="var ret = retType.fromWireType(rv);\nreturn ret;\n");P.push(g+"}\n");d=Eb(P).apply(null,l);ub(c,d,b-1);return[]})},
+d:function(a,b,c,d,f){function h(a){return a}b=J(b);-1===f&&(f=4294967295);var g=Oa(c);if(0===d){var k=32-8*c;h=function(a){return a<<k>>>k}}var p=-1!=b.indexOf("unsigned");Q(a,{name:b,fromWireType:h,toWireType:function(a,c){if("number"!==typeof c&&"boolean"!==typeof c)throw new TypeError('Cannot convert "'+U(c)+'" to '+this.name);if(c<d||c>f)throw new TypeError('Passing a number "'+U(c)+'" from JS side to C/C++ side to an argument of type "'+b+'", which is outside the valid range ['+d+", "+f+"]!");
+return p?c>>>0:c|0},argPackAdvance:8,readValueFromPointer:Gb(b,g,0!==d),ia:null})},b:function(a,b,c){function d(a){a>>=2;var b=E;return new f(b.buffer,b[a+1],b[a])}var f=[Int8Array,Uint8Array,Int16Array,Uint16Array,Int32Array,Uint32Array,Float32Array,Float64Array][b];c=J(c);Q(a,{name:c,fromWireType:d,argPackAdvance:8,readValueFromPointer:d},{Da:!0})},m:function(a,b){b=J(b);var c="std::string"===b;Q(a,{name:b,fromWireType:function(a){var b=E[a>>2];if(c){var d=C[a+4+b],g=0;0!=d&&(g=d,C[a+4+b]=0);var k=
+a+4;for(d=0;d<=b;++d){var p=a+4+d;if(0==C[p]){k=na(k);if(void 0===q)var q=k;else q+=String.fromCharCode(0),q+=k;k=p+1}}0!=g&&(C[a+4+b]=g)}else{q=Array(b);for(d=0;d<b;++d)q[d]=String.fromCharCode(C[a+4+d]);q=q.join("")}X(a);return q},toWireType:function(a,b){b instanceof ArrayBuffer&&(b=new Uint8Array(b));var d="string"===typeof b;d||b instanceof Uint8Array||b instanceof Uint8ClampedArray||b instanceof Int8Array||N("Cannot pass non-string to std::string");var f=(c&&d?function(){for(var a=0,c=0;c<b.length;++c){var d=
+b.charCodeAt(c);55296<=d&&57343>=d&&(d=65536+((d&1023)<<10)|b.charCodeAt(++c)&1023);127>=d?++a:a=2047>=d?a+2:65535>=d?a+3:a+4}return a}:function(){return b.length})(),k=Lb(4+f+1);E[k>>2]=f;if(c&&d)oa(b,k+4,f+1);else if(d)for(d=0;d<f;++d){var p=b.charCodeAt(d);255<p&&(X(k),N("String has UTF-16 code units that do not fit in 8 bits"));C[k+4+d]=p}else for(d=0;d<f;++d)C[k+4+d]=b[d];null!==a&&a.push(X,k);return k},argPackAdvance:8,readValueFromPointer:pb,ia:function(a){X(a)}})},z:function(a,b,c){c=J(c);
+if(2===b){var d=function(){return sa};var f=1}else 4===b&&(d=function(){return E},f=2);Q(a,{name:c,fromWireType:function(a){for(var b=d(),c=E[a>>2],h=Array(c),q=a+4>>f,l=0;l<c;++l)h[l]=String.fromCharCode(b[q+l]);X(a);return h.join("")},toWireType:function(a,c){var h=c.length,g=Lb(4+h*b),q=d();E[g>>2]=h;for(var l=g+4>>f,t=0;t<h;++t)q[l+t]=c.charCodeAt(t);null!==a&&a.push(X,g);return g},argPackAdvance:8,readValueFromPointer:pb,ia:function(a){X(a)}})},y:function(a,b){b=J(b);Q(a,{Ka:!0,name:b,argPackAdvance:0,
+fromWireType:function(){},toWireType:function(){}})},l:Cb,x:function(a){4<a&&(Y[a].ta+=1)},k:function(a,b){var c=L[a];void 0===c&&N("_emval_take_value has unknown type "+wb(a));a=c.readValueFromPointer(b);return lb(a)},__memory_base:1024,__table_base:0,i:function(){y()},w:Hb,u:function(a,b,c){C.set(C.subarray(b,b+c),a)},t:function(a){if(2147418112<a)return!1;for(var b=Math.max(Hb(),16777216);b<a;)536870912>=b?b=pa(2*b):b=Math.min(pa((3*b+2147483648)/4),2147418112);a:{try{B.grow(b-buffer.byteLength+
+65535>>16);va(B.buffer);var c=1;break a}catch(d){}c=void 0}return c?!0:!1},g:function(a){var b=Z.ma[a];Z.ma.splice(a,1);Mb(b)},f:Z,a:y,memory:B,s:function(){},table:ja},Nb=e.asm({},Ia,buffer);e.asm=Nb;e.___embind_register_native_and_builtin_types=function(){return e.asm.A.apply(null,arguments)};
+var xb=e.___getTypeName=function(){return e.asm.B.apply(null,arguments)},X=e._free=function(){return e.asm.C.apply(null,arguments)},Lb=e._malloc=function(){return e.asm.D.apply(null,arguments)},Ja=e.globalCtors=function(){return e.asm.X.apply(null,arguments)},Mb=e.stackRestore=function(){return e.asm.Y.apply(null,arguments)},Ib=e.stackSave=function(){return e.asm.Z.apply(null,arguments)};e.dynCall_i=function(){return e.asm.E.apply(null,arguments)};
+e.dynCall_ifi=function(){return e.asm.F.apply(null,arguments)};e.dynCall_ii=function(){return e.asm.G.apply(null,arguments)};e.dynCall_iidiiii=function(){return e.asm.H.apply(null,arguments)};e.dynCall_iii=function(){return e.asm.I.apply(null,arguments)};e.dynCall_iiii=function(){return e.asm.J.apply(null,arguments)};e.dynCall_iiiiif=function(){return e.asm.K.apply(null,arguments)};e.dynCall_iiiiiif=function(){return e.asm.L.apply(null,arguments)};
+e.dynCall_jiji=function(){return e.asm.M.apply(null,arguments)};e.dynCall_v=function(){return e.asm.N.apply(null,arguments)};e.dynCall_vi=function(){return e.asm.O.apply(null,arguments)};e.dynCall_vif=function(){return e.asm.P.apply(null,arguments)};e.dynCall_vii=function(){return e.asm.Q.apply(null,arguments)};e.dynCall_viii=function(){return e.asm.R.apply(null,arguments)};e.dynCall_viiii=function(){return e.asm.S.apply(null,arguments)};e.dynCall_viiiif=function(){return e.asm.T.apply(null,arguments)};
+e.dynCall_viiiii=function(){return e.asm.U.apply(null,arguments)};e.dynCall_viiiiif=function(){return e.asm.V.apply(null,arguments)};e.dynCall_viiiiii=function(){return e.asm.W.apply(null,arguments)};e.asm=Nb;var Ob;e.then=function(a){if(Ob)a(e);else{var b=e.onRuntimeInitialized;e.onRuntimeInitialized=function(){b&&b();a(e)}}return e};H=function Pb(){Ob||Qb();Ob||(H=Pb)};
+function Qb(){function a(){if(!Ob&&(Ob=!0,!ka)){xa(za);xa(Aa);if(e.onRuntimeInitialized)e.onRuntimeInitialized();if(e.postRun)for("function"==typeof e.postRun&&(e.postRun=[e.postRun]);e.postRun.length;){var a=e.postRun.shift();Ba.unshift(a)}xa(Ba)}}if(!(0<G)){if(e.preRun)for("function"==typeof e.preRun&&(e.preRun=[e.preRun]);e.preRun.length;)Ca();xa(ya);0<G||(e.setStatus?(e.setStatus("Running..."),setTimeout(function(){setTimeout(function(){e.setStatus("")},1);a()},1)):a())}}e.run=Qb;
+if(e.preInit)for("function"==typeof e.preInit&&(e.preInit=[e.preInit]);0<e.preInit.length;)e.preInit.pop()();Qb();
+
+
+  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 ./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
+)
+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\`"
+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 d;d||(d=typeof mozjpeg_enc !== 'undefined' ? mozjpeg_enc : {});var p={},q;for(q in d)d.hasOwnProperty(q)&&(p[q]=d[q]);var aa="./this.program";function t(a,b){throw b;}var u=!1,v=!1,ba=!1,ca=!1,da=!1;u="object"===typeof window;v="function"===typeof importScripts;ba=(ca="object"===typeof process&&"object"===typeof process.versions&&"string"===typeof process.versions.node)&&!u&&!v;da=!u&&!ba&&!v;var w="",x,z,ha,ia;
+if(ba)w=__dirname+"/",x=function(a,b){ha||(ha=require("fs"));ia||(ia=require("path"));a=ia.normalize(a);return ha.readFileSync(a,b?null:"utf8")},z=function(a){a=x(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 ja))throw a;}),process.on("unhandledRejection",A),t=function(a){process.exit(a)},d.inspect=function(){return"[Emscripten Module object]"};
+else if(da)"undefined"!=typeof read&&(x=function(a){return read(a)}),z=function(a){if("function"===typeof readbuffer)return new Uint8Array(readbuffer(a));a=read(a,"binary");"object"===typeof a||A("Assertion failed: undefined");return a},"function"===typeof quit&&(t=function(a){quit(a)}),"undefined"!==typeof print&&("undefined"===typeof console&&(console={}),console.log=print,console.warn=console.error="undefined"!==typeof printErr?printErr:print);else if(u||v)v?w=self.location.href:document.currentScript&&
+(w=document.currentScript.src),_scriptDir&&(w=_scriptDir),0!==w.indexOf("blob:")?w=w.substr(0,w.lastIndexOf("/")+1):w="",x=function(a){var b=new XMLHttpRequest;b.open("GET",a,!1);b.send(null);return b.responseText},v&&(z=function(a){var b=new XMLHttpRequest;b.open("GET",a,!1);b.responseType="arraybuffer";b.send(null);return new Uint8Array(b.response)});var ka=d.print||console.log.bind(console),B=d.printErr||console.warn.bind(console);for(q in p)p.hasOwnProperty(q)&&(d[q]=p[q]);p=null;
+d.thisProgram&&(aa=d.thisProgram);d.quit&&(t=d.quit);function la(a){var b=C[ma>>2];a=b+a+15&-16;a>na()&&A();C[ma>>2]=a;return b}var oa={"f64-rem":function(a,b){return a%b},"debugger":function(){}},D;d.wasmBinary&&(D=d.wasmBinary);var pa;d.noExitRuntime&&(pa=d.noExitRuntime);"object"!==typeof WebAssembly&&B("no native wasm support detected");var E,qa=new WebAssembly.Table({initial:208,maximum:208,element:"anyfunc"}),ra=!1,sa="undefined"!==typeof TextDecoder?new TextDecoder("utf8"):void 0;
+function ta(a,b,c){var e=b+c;for(c=b;a[c]&&!(c>=e);)++c;if(16<c-b&&a.subarray&&sa)return sa.decode(a.subarray(b,c));for(e="";b<c;){var f=a[b++];if(f&128){var g=a[b++]&63;if(192==(f&224))e+=String.fromCharCode((f&31)<<6|g);else{var h=a[b++]&63;f=224==(f&240)?(f&15)<<12|g<<6|h:(f&7)<<18|g<<12|h<<6|a[b++]&63;65536>f?e+=String.fromCharCode(f):(f-=65536,e+=String.fromCharCode(55296|f>>10,56320|f&1023))}}else e+=String.fromCharCode(f)}return e}
+function ua(a,b,c,e){if(0<e){e=c+e-1;for(var f=0;f<a.length;++f){var g=a.charCodeAt(f);if(55296<=g&&57343>=g){var h=a.charCodeAt(++f);g=65536+((g&1023)<<10)|h&1023}if(127>=g){if(c>=e)break;b[c++]=g}else{if(2047>=g){if(c+1>=e)break;b[c++]=192|g>>6}else{if(65535>=g){if(c+2>=e)break;b[c++]=224|g>>12}else{if(c+3>=e)break;b[c++]=240|g>>18;b[c++]=128|g>>12&63}b[c++]=128|g>>6&63}b[c++]=128|g&63}}b[c]=0}}
+function va(a){for(var b=0,c=0;c<a.length;++c){var e=a.charCodeAt(c);55296<=e&&57343>=e&&(e=65536+((e&1023)<<10)|a.charCodeAt(++c)&1023);127>=e?++b:b=2047>=e?b+2:65535>=e?b+3:b+4}return b}"undefined"!==typeof TextDecoder&&new TextDecoder("utf-16le");function wa(a){0<a%65536&&(a+=65536-a%65536);return a}var buffer,F,G,xa,ya,C,H,za,Aa;
+function Ca(a){buffer=a;d.HEAP8=F=new Int8Array(a);d.HEAP16=xa=new Int16Array(a);d.HEAP32=C=new Int32Array(a);d.HEAPU8=G=new Uint8Array(a);d.HEAPU16=ya=new Uint16Array(a);d.HEAPU32=H=new Uint32Array(a);d.HEAPF32=za=new Float32Array(a);d.HEAPF64=Aa=new Float64Array(a)}var ma=89296,Da=d.TOTAL_MEMORY||16777216;d.wasmMemory?E=d.wasmMemory:E=new WebAssembly.Memory({initial:Da/65536});E&&(buffer=E.buffer);Da=buffer.byteLength;Ca(buffer);C[ma>>2]=5332368;
+function I(a){for(;0<a.length;){var b=a.shift();if("function"==typeof b)b();else{var c=b.ha;"number"===typeof c?void 0===b.ba?d.dynCall_v(c):d.dynCall_vi(c,b.ba):c(void 0===b.ba?null:b.ba)}}}var Ea=[],Fa=[],Ga=[],Ha=[],Ia=!1;function Ja(){var a=d.preRun.shift();Ea.unshift(a)}var J=0,Ka=null,K=null;d.preloadedImages={};d.preloadedAudios={};function A(a){if(d.onAbort)d.onAbort(a);ka(a);B(a);ra=!0;throw new WebAssembly.RuntimeError("abort("+a+"). Build with -s ASSERTIONS=1 for more info.");}
+function La(){var a=M;return String.prototype.startsWith?a.startsWith("data:application/octet-stream;base64,"):0===a.indexOf("data:application/octet-stream;base64,")}var M="mozjpeg_enc.wasm";if(!La()){var Ma=M;M=d.locateFile?d.locateFile(Ma,w):w+Ma}function Na(){try{if(D)return new Uint8Array(D);if(z)return z(M);throw"both async and sync fetching of the wasm failed";}catch(a){A(a)}}
+function Oa(){return D||!u&&!v||"function"!==typeof fetch?new Promise(function(a){a(Na())}):fetch(M,{credentials:"same-origin"}).then(function(a){if(!a.ok)throw"failed to load wasm binary file at '"+M+"'";return a.arrayBuffer()}).catch(function(){return Na()})}
+d.asm=function(){function a(a){d.asm=a.exports;J--;d.monitorRunDependencies&&d.monitorRunDependencies(J);0==J&&(null!==Ka&&(clearInterval(Ka),Ka=null),K&&(a=K,K=null,a()))}function b(b){a(b.instance)}function c(a){return Oa().then(function(a){return WebAssembly.instantiate(a,e)}).then(a,function(a){B("failed to asynchronously prepare wasm: "+a);A(a)})}var e={env:Pa,wasi_unstable:Pa,global:{NaN:NaN,Infinity:Infinity},"global.Math":Math,asm2wasm:oa};J++;d.monitorRunDependencies&&d.monitorRunDependencies(J);
+if(d.instantiateWasm)try{return d.instantiateWasm(e,a)}catch(f){return B("Module.instantiateWasm callback failed with error: "+f),!1}(function(){if(D||"function"!==typeof WebAssembly.instantiateStreaming||La()||"function"!==typeof fetch)return c(b);fetch(M,{credentials:"same-origin"}).then(function(a){return WebAssembly.instantiateStreaming(a,e).then(b,function(a){B("wasm streaming compile failed: "+a);B("falling back to ArrayBuffer instantiation");c(b)})})})();return{}};Fa.push({ha:function(){Qa()}});
+var O={};
+function Ra(a){if(Ra.aa){var b=C[a>>2];var c=C[b>>2]}else Ra.aa=!0,O.USER="web_user",O.LOGNAME="web_user",O.PATH="/",O.PWD="/",O.HOME="/home/web_user",O.LANG=("object"===typeof navigator&&navigator.languages&&navigator.languages[0]||"C").replace("-","_")+".UTF-8",O._=aa,c=Ia?P(1024):la(1024),b=Ia?P(256):la(256),C[b>>2]=c,C[a>>2]=b;a=[];var e=0,f;for(f in O)if("string"===typeof O[f]){var g=f+"="+O[f];a.push(g);e+=g.length}if(1024<e)throw Error("Environment size exceeded TOTAL_ENV_SIZE!");for(f=0;f<
+a.length;f++){e=g=a[f];for(var h=c,k=0;k<e.length;++k)F[h++>>0]=e.charCodeAt(k);F[h>>0]=0;C[b+4*f>>2]=c;c+=g.length+1}C[b+4*a.length>>2]=0}var Sa=[null,[],[]];function Ta(){return 0}function Ua(){return 0}function Va(a,b,c,e){try{for(var f=0,g=0;g<c;g++){for(var h=C[b+8*g>>2],k=C[b+(8*g+4)>>2],r=0;r<k;r++){var m=G[h+r],y=Sa[a];0===m||10===m?((1===a?ka:B)(ta(y,0)),y.length=0):y.push(m)}f+=k}C[e>>2]=f;return 0}catch(n){return"undefined"!==typeof FS&&n instanceof FS.ra||A(n),n.sa}}var Wa={};
+function Xa(a){for(;a.length;){var b=a.pop();a.pop()(b)}}function Ya(a){return this.fromWireType(H[a>>2])}var Q={},R={},Za={};function $a(a){if(void 0===a)return"_unknown";a=a.replace(/[^a-zA-Z0-9_]/g,"$");var b=a.charCodeAt(0);return 48<=b&&57>=b?"_"+a:a}function ab(a,b){a=$a(a);return(new Function("body","return function "+a+'() {\n    "use strict";    return body.apply(this, arguments);\n};\n'))(b)}
+function bb(a){var b=Error,c=ab(a,function(b){this.name=a;this.message=b;b=Error(b).stack;void 0!==b&&(this.stack=this.toString()+"\n"+b.replace(/^Error(:[^\n]*)?\n/,""))});c.prototype=Object.create(b.prototype);c.prototype.constructor=c;c.prototype.toString=function(){return void 0===this.message?this.name:this.name+": "+this.message};return c}var cb=void 0;
+function db(a,b,c){function e(b){b=c(b);if(b.length!==a.length)throw new cb("Mismatched type converter count");for(var e=0;e<a.length;++e)S(a[e],b[e])}a.forEach(function(a){Za[a]=b});var f=Array(b.length),g=[],h=0;b.forEach(function(a,b){R.hasOwnProperty(a)?f[b]=R[a]:(g.push(a),Q.hasOwnProperty(a)||(Q[a]=[]),Q[a].push(function(){f[b]=R[a];++h;h===g.length&&e(f)}))});0===g.length&&e(f)}
+function eb(a){switch(a){case 1:return 0;case 2:return 1;case 4:return 2;case 8:return 3;default:throw new TypeError("Unknown type size: "+a);}}var gb=void 0;function T(a){for(var b="";G[a];)b+=gb[G[a++]];return b}var hb=void 0;function U(a){throw new hb(a);}
+function S(a,b,c){c=c||{};if(!("argPackAdvance"in b))throw new TypeError("registerType registeredInstance requires argPackAdvance");var e=b.name;a||U('type "'+e+'" must have a positive integer typeid pointer');if(R.hasOwnProperty(a)){if(c.la)return;U("Cannot register type '"+e+"' twice")}R[a]=b;delete Za[a];Q.hasOwnProperty(a)&&(b=Q[a],delete Q[a],b.forEach(function(a){a()}))}var ib=[],V=[{},{value:void 0},{value:null},{value:!0},{value:!1}];
+function jb(a){4<a&&0===--V[a].da&&(V[a]=void 0,ib.push(a))}function kb(a){switch(a){case void 0:return 1;case null:return 2;case !0:return 3;case !1:return 4;default:var b=ib.length?ib.pop():V.length;V[b]={da:1,value:a};return b}}function lb(a){if(null===a)return"null";var b=typeof a;return"object"===b||"array"===b||"function"===b?a.toString():""+a}
+function mb(a,b){switch(b){case 2:return function(a){return this.fromWireType(za[a>>2])};case 3:return function(a){return this.fromWireType(Aa[a>>3])};default:throw new TypeError("Unknown float type: "+a);}}function nb(a){var b=Function;if(!(b instanceof Function))throw new TypeError("new_ called with constructor type "+typeof b+" which is not a function");var c=ab(b.name||"unknownFunctionName",function(){});c.prototype=b.prototype;c=new c;a=b.apply(c,a);return a instanceof Object?a:c}
+function ob(a,b){var c=d;if(void 0===c[a].Z){var e=c[a];c[a]=function(){c[a].Z.hasOwnProperty(arguments.length)||U("Function '"+b+"' called with an invalid number of arguments ("+arguments.length+") - expects one of ("+c[a].Z+")!");return c[a].Z[arguments.length].apply(this,arguments)};c[a].Z=[];c[a].Z[e.fa]=e}}
+function pb(a,b,c){d.hasOwnProperty(a)?((void 0===c||void 0!==d[a].Z&&void 0!==d[a].Z[c])&&U("Cannot register public name '"+a+"' twice"),ob(a,a),d.hasOwnProperty(c)&&U("Cannot register multiple overloads of a function with the same number of arguments ("+c+")!"),d[a].Z[c]=b):(d[a]=b,void 0!==c&&(d[a].ua=c))}function qb(a,b){for(var c=[],e=0;e<a;e++)c.push(C[(b>>2)+e]);return c}
+function W(a,b){a=T(a);if(void 0!==d["FUNCTION_TABLE_"+a])var c=d["FUNCTION_TABLE_"+a][b];else if("undefined"!==typeof FUNCTION_TABLE)c=FUNCTION_TABLE[b];else{c=d["dynCall_"+a];void 0===c&&(c=d["dynCall_"+a.replace(/f/g,"d")],void 0===c&&U("No dynCall invoker for signature: "+a));for(var e=[],f=1;f<a.length;++f)e.push("a"+f);f="return function "+("dynCall_"+a+"_"+b)+"("+e.join(", ")+") {\n";f+="    return dynCall(rawFunction"+(e.length?", ":"")+e.join(", ")+");\n";c=(new Function("dynCall","rawFunction",
+f+"};\n"))(c,b)}"function"!==typeof c&&U("unknown function pointer with signature "+a+": "+b);return c}var rb=void 0;function sb(a){a=tb(a);var b=T(a);X(a);return b}function ub(a,b){function c(a){f[a]||R[a]||(Za[a]?Za[a].forEach(c):(e.push(a),f[a]=!0))}var e=[],f={};b.forEach(c);throw new rb(a+": "+e.map(sb).join([", "]));}
+function vb(a,b,c){switch(b){case 0:return c?function(a){return F[a]}:function(a){return G[a]};case 1:return c?function(a){return xa[a>>1]}:function(a){return ya[a>>1]};case 2:return c?function(a){return C[a>>2]}:function(a){return H[a>>2]};default:throw new TypeError("Unknown integer type: "+a);}}function na(){return F.length}function Y(a){if(0===a)return 0;a=a?ta(G,a,void 0):"";if(!O.hasOwnProperty(a))return 0;Y.aa&&X(Y.aa);a=O[a];var b=va(a)+1,c=P(b);c&&ua(a,F,c,b);Y.aa=c;return Y.aa}
+cb=d.InternalError=bb("InternalError");for(var wb=Array(256),xb=0;256>xb;++xb)wb[xb]=String.fromCharCode(xb);gb=wb;hb=d.BindingError=bb("BindingError");d.count_emval_handles=function(){for(var a=0,b=5;b<V.length;++b)void 0!==V[b]&&++a;return a};d.get_first_emval=function(){for(var a=5;a<V.length;++a)if(void 0!==V[a])return V[a];return null};rb=d.UnboundTypeError=bb("UnboundTypeError");
+var Pa={B:Ra,u:function(){return Ta.apply(null,arguments)},n:function(){return Ua.apply(null,arguments)},m:function(){return Va.apply(null,arguments)},l:function(a){var b=Wa[a];delete Wa[a];var c=b.ma,e=b.na,f=b.ea,g=f.map(function(a){return a.ka}).concat(f.map(function(a){return a.pa}));db([a],g,function(a){var g={};f.forEach(function(b,c){var e=a[c],k=b.ia,r=b.ja,h=a[c+f.length],m=b.oa,fa=b.qa;g[b.ga]={read:function(a){return e.fromWireType(k(r,a))},write:function(a,b){var c=[];m(fa,a,h.toWireType(c,
+b));Xa(c)}}});return[{name:b.name,fromWireType:function(a){var b={},c;for(c in g)b[c]=g[c].read(a);e(a);return b},toWireType:function(a,b){for(var f in g)if(!(f in b))throw new TypeError("Missing field");var k=c();for(f in g)g[f].write(k,b[f]);null!==a&&a.push(e,k);return k},argPackAdvance:8,readValueFromPointer:Ya,$:e}]})},k:function(a,b,c,e,f){var g=eb(c);b=T(b);S(a,{name:b,fromWireType:function(a){return!!a},toWireType:function(a,b){return b?e:f},argPackAdvance:8,readValueFromPointer:function(a){if(1===
+c)var e=F;else if(2===c)e=xa;else if(4===c)e=C;else throw new TypeError("Unknown boolean type size: "+b);return this.fromWireType(e[a>>g])},$:null})},j:function(a,b){b=T(b);S(a,{name:b,fromWireType:function(a){var b=V[a].value;jb(a);return b},toWireType:function(a,b){return kb(b)},argPackAdvance:8,readValueFromPointer:Ya,$:null})},g:function(a,b,c){c=eb(c);b=T(b);S(a,{name:b,fromWireType:function(a){return a},toWireType:function(a,b){if("number"!==typeof b&&"boolean"!==typeof b)throw new TypeError('Cannot convert "'+
+lb(b)+'" to '+this.name);return b},argPackAdvance:8,readValueFromPointer:mb(b,c),$:null})},f:function(a,b,c,e,f,g){var h=qb(b,c);a=T(a);f=W(e,f);pb(a,function(){ub("Cannot call "+a+" due to unbound types",h)},b-1);db([],h,function(c){var e=[c[0],null].concat(c.slice(1)),h=c=a,k=f,n=e.length;2>n&&U("argTypes array size mismatch! Must at least get return value and 'this' types!");for(var Ba=null!==e[1]&&!1,ea=!1,l=1;l<e.length;++l)if(null!==e[l]&&void 0===e[l].$){ea=!0;break}var fa="void"!==e[0].name,
+L="",N="";for(l=0;l<n-2;++l)L+=(0!==l?", ":"")+"arg"+l,N+=(0!==l?", ":"")+"arg"+l+"Wired";h="return function "+$a(h)+"("+L+") {\nif (arguments.length !== "+(n-2)+") {\nthrowBindingError('function "+h+" called with ' + arguments.length + ' arguments, expected "+(n-2)+" args!');\n}\n";ea&&(h+="var destructors = [];\n");var fb=ea?"destructors":"null";L="throwBindingError invoker fn runDestructors retType classParam".split(" ");k=[U,k,g,Xa,e[0],e[1]];Ba&&(h+="var thisWired = classParam.toWireType("+fb+
+", this);\n");for(l=0;l<n-2;++l)h+="var arg"+l+"Wired = argType"+l+".toWireType("+fb+", arg"+l+"); // "+e[l+2].name+"\n",L.push("argType"+l),k.push(e[l+2]);Ba&&(N="thisWired"+(0<N.length?", ":"")+N);h+=(fa?"var rv = ":"")+"invoker(fn"+(0<N.length?", ":"")+N+");\n";if(ea)h+="runDestructors(destructors);\n";else for(l=Ba?1:2;l<e.length;++l)n=1===l?"thisWired":"arg"+(l-2)+"Wired",null!==e[l].$&&(h+=n+"_dtor("+n+"); // "+e[l].name+"\n",L.push(n+"_dtor"),k.push(e[l].$));fa&&(h+="var ret = retType.fromWireType(rv);\nreturn ret;\n");
+L.push(h+"}\n");e=nb(L).apply(null,k);l=b-1;if(!d.hasOwnProperty(c))throw new cb("Replacing nonexistant public symbol");void 0!==d[c].Z&&void 0!==l?d[c].Z[l]=e:(d[c]=e,d[c].fa=l);return[]})},c:function(a,b,c,e,f){function g(a){return a}b=T(b);-1===f&&(f=4294967295);var h=eb(c);if(0===e){var k=32-8*c;g=function(a){return a<<k>>>k}}var r=-1!=b.indexOf("unsigned");S(a,{name:b,fromWireType:g,toWireType:function(a,c){if("number"!==typeof c&&"boolean"!==typeof c)throw new TypeError('Cannot convert "'+lb(c)+
+'" to '+this.name);if(c<e||c>f)throw new TypeError('Passing a number "'+lb(c)+'" from JS side to C/C++ side to an argument of type "'+b+'", which is outside the valid range ['+e+", "+f+"]!");return r?c>>>0:c|0},argPackAdvance:8,readValueFromPointer:vb(b,h,0!==e),$:null})},b:function(a,b,c){function e(a){a>>=2;var b=H;return new f(b.buffer,b[a+1],b[a])}var f=[Int8Array,Uint8Array,Int16Array,Uint16Array,Int32Array,Uint32Array,Float32Array,Float64Array][b];c=T(c);S(a,{name:c,fromWireType:e,argPackAdvance:8,
+readValueFromPointer:e},{la:!0})},i:function(a,b){b=T(b);var c="std::string"===b;S(a,{name:b,fromWireType:function(a){var b=H[a>>2];if(c){var e=G[a+4+b],h=0;0!=e&&(h=e,G[a+4+b]=0);var k=a+4;for(e=0;e<=b;++e){var r=a+4+e;if(0==G[r]){k=k?ta(G,k,void 0):"";if(void 0===m)var m=k;else m+=String.fromCharCode(0),m+=k;k=r+1}}0!=h&&(G[a+4+b]=h)}else{m=Array(b);for(e=0;e<b;++e)m[e]=String.fromCharCode(G[a+4+e]);m=m.join("")}X(a);return m},toWireType:function(a,b){b instanceof ArrayBuffer&&(b=new Uint8Array(b));
+var e="string"===typeof b;e||b instanceof Uint8Array||b instanceof Uint8ClampedArray||b instanceof Int8Array||U("Cannot pass non-string to std::string");var f=(c&&e?function(){return va(b)}:function(){return b.length})(),k=P(4+f+1);H[k>>2]=f;if(c&&e)ua(b,G,k+4,f+1);else if(e)for(e=0;e<f;++e){var r=b.charCodeAt(e);255<r&&(X(k),U("String has UTF-16 code units that do not fit in 8 bits"));G[k+4+e]=r}else for(e=0;e<f;++e)G[k+4+e]=b[e];null!==a&&a.push(X,k);return k},argPackAdvance:8,readValueFromPointer:Ya,
+$:function(a){X(a)}})},A:function(a,b,c){c=T(c);if(2===b){var e=function(){return ya};var f=1}else 4===b&&(e=function(){return H},f=2);S(a,{name:c,fromWireType:function(a){for(var b=e(),c=H[a>>2],g=Array(c),m=a+4>>f,y=0;y<c;++y)g[y]=String.fromCharCode(b[m+y]);X(a);return g.join("")},toWireType:function(a,c){var g=c.length,h=P(4+g*b),m=e();H[h>>2]=g;for(var y=h+4>>f,n=0;n<g;++n)m[y+n]=c.charCodeAt(n);null!==a&&a.push(X,h);return h},argPackAdvance:8,readValueFromPointer:Ya,$:function(a){X(a)}})},z:function(a,
+b,c,e,f,g){Wa[a]={name:T(b),ma:W(c,e),na:W(f,g),ea:[]}},h:function(a,b,c,e,f,g,h,k,r,m){Wa[a].ea.push({ga:T(b),ka:c,ia:W(e,f),ja:g,pa:h,oa:W(k,r),qa:m})},y:function(a,b){b=T(b);S(a,{ta:!0,name:b,argPackAdvance:0,fromWireType:function(){},toWireType:function(){}})},x:jb,w:function(a){4<a&&(V[a].da+=1)},v:function(a,b){var c=R[a];void 0===c&&U("_emval_take_value has unknown type "+sb(a));a=c.readValueFromPointer(b);return kb(a)},__memory_base:1024,__table_base:0,e:function(){A()},t:na,s:function(a,
+b,c){G.set(G.subarray(b,b+c),a)},r:function(a){if(2147418112<a)return!1;for(var b=Math.max(na(),16777216);b<a;)536870912>=b?b=wa(2*b):b=Math.min(wa((3*b+2147483648)/4),2147418112);a:{try{E.grow(b-buffer.byteLength+65535>>16);Ca(E.buffer);var c=1;break a}catch(e){}c=void 0}return c?!0:!1},q:function(a){if(!pa&&(ra=!0,d.onExit))d.onExit(a);t(a,new ja(a))},p:Y,d:function(a){return Math.pow(2,a)},a:A,memory:E,o:function(){},table:qa},yb=d.asm({},Pa,buffer);d.asm=yb;
+d.___embind_register_native_and_builtin_types=function(){return d.asm.C.apply(null,arguments)};var tb=d.___getTypeName=function(){return d.asm.D.apply(null,arguments)},X=d._free=function(){return d.asm.E.apply(null,arguments)},P=d._malloc=function(){return d.asm.F.apply(null,arguments)},Qa=d.globalCtors=function(){return d.asm.Y.apply(null,arguments)};d.dynCall_i=function(){return d.asm.G.apply(null,arguments)};d.dynCall_ii=function(){return d.asm.H.apply(null,arguments)};
+d.dynCall_iidiiii=function(){return d.asm.I.apply(null,arguments)};d.dynCall_iii=function(){return d.asm.J.apply(null,arguments)};d.dynCall_iiii=function(){return d.asm.K.apply(null,arguments)};d.dynCall_iiiii=function(){return d.asm.L.apply(null,arguments)};d.dynCall_iiiiii=function(){return d.asm.M.apply(null,arguments)};d.dynCall_iiiiiii=function(){return d.asm.N.apply(null,arguments)};d.dynCall_jiji=function(){return d.asm.O.apply(null,arguments)};
+d.dynCall_v=function(){return d.asm.P.apply(null,arguments)};d.dynCall_vi=function(){return d.asm.Q.apply(null,arguments)};d.dynCall_vii=function(){return d.asm.R.apply(null,arguments)};d.dynCall_viii=function(){return d.asm.S.apply(null,arguments)};d.dynCall_viiii=function(){return d.asm.T.apply(null,arguments)};d.dynCall_viiiii=function(){return d.asm.U.apply(null,arguments)};d.dynCall_viiiiii=function(){return d.asm.V.apply(null,arguments)};
+d.dynCall_viiiiiii=function(){return d.asm.W.apply(null,arguments)};d.dynCall_viiiiiiii=function(){return d.asm.X.apply(null,arguments)};d.asm=yb;var Z;d.then=function(a){if(Z)a(d);else{var b=d.onRuntimeInitialized;d.onRuntimeInitialized=function(){b&&b();a(d)}}return d};function ja(a){this.name="ExitStatus";this.message="Program terminated with exit("+a+")";this.status=a}K=function zb(){Z||Ab();Z||(K=zb)};
+function Ab(){function a(){if(!Z&&(Z=!0,!ra)){Ia=!0;I(Fa);I(Ga);if(d.onRuntimeInitialized)d.onRuntimeInitialized();if(d.postRun)for("function"==typeof d.postRun&&(d.postRun=[d.postRun]);d.postRun.length;){var a=d.postRun.shift();Ha.unshift(a)}I(Ha)}}if(!(0<J)){if(d.preRun)for("function"==typeof d.preRun&&(d.preRun=[d.preRun]);d.preRun.length;)Ja();I(Ea);0<J||(d.setStatus?(d.setStatus("Running..."),setTimeout(function(){setTimeout(function(){d.setStatus("")},1);a()},1)):a())}}d.run=Ab;
+if(d.preInit)for("function"==typeof d.preInit&&(d.preInit=[d.preInit]);0<d.preInit.length;)d.preInit.pop()();pa=!0;Ab();
+
+
+  return mozjpeg_enc
+}
+);
+})();
+if (typeof exports === 'object' && typeof module === 'object')
+      module.exports = mozjpeg_enc;
+    else if (typeof define === 'function' && define['amd'])
+      define([], function() { return mozjpeg_enc; });
+    else if (typeof exports === 'object')
+      exports["mozjpeg_enc"] = mozjpeg_enc;
+    

codecs/mozjpeg_enc/package.json

@@ -0,0 +1,13 @@
+{
+  "name": "mozjpeg_enc",
+  "scripts": {
+    "install": "napa",
+    "build": "docker run --rm -v $(pwd):/src trzeci/emscripten ./build.sh"
+  },
+  "napa": {
+    "mozjpeg": "mozilla/mozjpeg#v3.3.1"
+  },
+  "devDependencies": {
+    "napa": "3.0.0"
+  }
+}

codecs/oxipng/.gitignore

@@ -0,0 +1 @@
+/target

codecs/oxipng/Cargo.lock

@@ -0,0 +1,501 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "adler32"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "autocfg"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "bit-vec"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "bitflags"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "build_const"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "bumpalo"
+version = "3.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "bytemuck"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "byteorder"
+version = "1.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "cc"
+version = "1.0.50"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "cfg-if"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "cloudflare-zlib"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cloudflare-zlib-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "cloudflare-zlib-sys"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cc 1.0.50 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "crc"
+version = "1.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "build_const 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "crc32fast"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "crossbeam-deque"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "crossbeam-epoch 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-utils 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "maybe-uninit 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "crossbeam-epoch"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-utils 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "maybe-uninit 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memoffset 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "scopeguard 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "crossbeam-queue"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-utils 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "crossbeam-utils"
+version = "0.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "deflate"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "adler32 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "either"
+version = "1.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "hermit-abi"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "image"
+version = "0.23.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bytemuck 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-iter 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-rational 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "png 0.16.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "indexmap"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rayon 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "inflate"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "adler32 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "itertools"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "either 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "libc"
+version = "0.2.68"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "libdeflater"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cc 1.0.50 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "log"
+version = "0.4.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "maybe-uninit"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "memoffset"
+version = "0.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "miniz_oxide"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "adler32 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "num-integer"
+version = "0.1.42"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "num-iter"
+version = "0.1.40"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-integer 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "num-rational"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-integer 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "num_cpus"
+version = "1.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "hermit-abi 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "oxipng"
+version = "0.1.0"
+dependencies = [
+ "oxipng 2.3.0 (git+https://github.com/shssoichiro/oxipng.git)",
+ "wasm-bindgen 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "oxipng"
+version = "2.3.0"
+source = "git+https://github.com/shssoichiro/oxipng.git#f74726915131ec7ff1df0514436aac34bc603cff"
+dependencies = [
+ "bit-vec 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cloudflare-zlib 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crc 1.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "image 0.23.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "indexmap 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "itertools 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libdeflater 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "miniz_oxide 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num_cpus 1.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rgb 0.8.16 (registry+https://github.com/rust-lang/crates.io-index)",
+ "zopfli 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "png"
+version = "0.16.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crc32fast 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "deflate 0.8.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "inflate 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.10 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rayon"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "crossbeam-deque 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "either 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rayon-core 1.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rayon-core"
+version = "1.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "crossbeam-deque 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-queue 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-utils 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num_cpus 1.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rgb"
+version = "0.8.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "scopeguard"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "syn"
+version = "1.0.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "typed-arena"
+version = "1.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "wasm-bindgen"
+version = "0.2.60"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasm-bindgen-macro 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "wasm-bindgen-backend"
+version = "0.2.60"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bumpalo 3.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasm-bindgen-shared 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.60"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasm-bindgen-macro-support 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.60"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasm-bindgen-backend 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasm-bindgen-shared 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.60"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "zopfli"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "adler32 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crc 1.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "typed-arena 1.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[metadata]
+"checksum adler32 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "5d2e7343e7fc9de883d1b0341e0b13970f764c14101234857d2ddafa1cb1cac2"
+"checksum autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f8aac770f1885fd7e387acedd76065302551364496e46b3dd00860b2f8359b9d"
+"checksum bit-vec 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)" = "a4523a10839ffae575fb08aa3423026c8cb4687eef43952afb956229d4f246f7"
+"checksum bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
+"checksum build_const 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "39092a32794787acd8525ee150305ff051b0aa6cc2abaf193924f5ab05425f39"
+"checksum bumpalo 3.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "12ae9db68ad7fac5fe51304d20f016c911539251075a214f8e663babefa35187"
+"checksum bytemuck 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "37fa13df2292ecb479ec23aa06f4507928bef07839be9ef15281411076629431"
+"checksum byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "08c48aae112d48ed9f069b33538ea9e3e90aa263cfa3d1c24309612b1f7472de"
+"checksum cc 1.0.50 (registry+https://github.com/rust-lang/crates.io-index)" = "95e28fa049fda1c330bcf9d723be7663a899c4679724b34c81e9f5a326aab8cd"
+"checksum cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
+"checksum cloudflare-zlib 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)" = "f5ed63a019d55bacd15cadcbcb96bf41b16281417fff393bdb55fa84255fe4b9"
+"checksum cloudflare-zlib-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7e195cb274a0d6ee87e718838a09baecd7cbc9f6075dac256a84cb5842739c06"
+"checksum crc 1.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d663548de7f5cca343f1e0a48d14dcfb0e9eb4e079ec58883b7251539fa10aeb"
+"checksum crc32fast 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ba125de2af0df55319f41944744ad91c71113bf74a4646efff39afe1f6842db1"
+"checksum crossbeam-deque 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)" = "9f02af974daeee82218205558e51ec8768b48cf524bd01d550abe5573a608285"
+"checksum crossbeam-epoch 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)" = "058ed274caafc1f60c4997b5fc07bf7dc7cca454af7c6e81edffe5f33f70dace"
+"checksum crossbeam-queue 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c695eeca1e7173472a32221542ae469b3e9aac3a4fc81f7696bcad82029493db"
+"checksum crossbeam-utils 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)" = "c3c7c73a2d1e9fc0886a08b93e98eb643461230d5f1925e4036204d5f2e261a8"
+"checksum deflate 0.8.3 (registry+https://github.com/rust-lang/crates.io-index)" = "050ef6de42a33903b30a7497b76b40d3d58691d4d3eec355348c122444a388f0"
+"checksum either 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "bb1f6b1ce1c140482ea30ddd3335fc0024ac7ee112895426e0a629a6c20adfe3"
+"checksum hermit-abi 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "725cf19794cf90aa94e65050cb4191ff5d8fa87a498383774c47b332e3af952e"
+"checksum image 0.23.2 (registry+https://github.com/rust-lang/crates.io-index)" = "9062b90712d25bc6bb165d110aa59c6b47c849246e341e7b86a98daff9d49f60"
+"checksum indexmap 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "076f042c5b7b98f31d205f1249267e12a6518c1481e9dae9764af19b707d2292"
+"checksum inflate 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)" = "1cdb29978cc5797bd8dcc8e5bf7de604891df2a8dc576973d71a281e916db2ff"
+"checksum itertools 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "284f18f85651fe11e8a991b2adb42cb078325c996ed026d994719efcfca1d54b"
+"checksum lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+"checksum libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)" = "dea0c0405123bba743ee3f91f49b1c7cfb684eef0da0a50110f758ccf24cdff0"
+"checksum libdeflater 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "66dca08b13369865b2f6dca1dd05f833985cbe6c12a676b04d55f78b85e80246"
+"checksum log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)" = "14b6052be84e6b71ab17edffc2eeabf5c2c3ae1fdb464aae35ac50c67a44e1f7"
+"checksum maybe-uninit 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "60302e4db3a61da70c0cb7991976248362f30319e88850c487b9b95bbf059e00"
+"checksum memoffset 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)" = "b4fc2c02a7e374099d4ee95a193111f72d2110197fe200272371758f6c3643d8"
+"checksum miniz_oxide 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "aa679ff6578b1cddee93d7e82e263b94a575e0bfced07284eb0c037c1d2416a5"
+"checksum num-integer 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)" = "3f6ea62e9d81a77cd3ee9a2a5b9b609447857f3d358704331e4ef39eb247fcba"
+"checksum num-iter 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)" = "dfb0800a0291891dd9f4fe7bd9c19384f98f7fbe0cd0f39a2c6b88b9868bbc00"
+"checksum num-rational 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "5c000134b5dbf44adc5cb772486d335293351644b801551abe8f75c84cfa4aef"
+"checksum num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "c62be47e61d1842b9170f0fdeec8eba98e60e90e5446449a0545e5152acd7096"
+"checksum num_cpus 1.12.0 (registry+https://github.com/rust-lang/crates.io-index)" = "46203554f085ff89c235cd12f7075f3233af9b11ed7c9e16dfe2560d03313ce6"
+"checksum oxipng 2.3.0 (git+https://github.com/shssoichiro/oxipng.git)" = "<none>"
+"checksum png 0.16.1 (registry+https://github.com/rust-lang/crates.io-index)" = "46060468187c21c00ffa2a920690b29997d7fd543f5a4d400461e4a7d4fccde8"
+"checksum proc-macro2 1.0.10 (registry+https://github.com/rust-lang/crates.io-index)" = "df246d292ff63439fea9bc8c0a270bed0e390d5ebd4db4ba15aba81111b5abe3"
+"checksum quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2bdc6c187c65bca4260c9011c9e3132efe4909da44726bad24cf7572ae338d7f"
+"checksum rayon 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "db6ce3297f9c85e16621bb8cca38a06779ffc31bb8184e1be4bed2be4678a098"
+"checksum rayon-core 1.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "08a89b46efaf957e52b18062fb2f4660f8b8a4dde1807ca002690868ef2c85a9"
+"checksum rgb 0.8.16 (registry+https://github.com/rust-lang/crates.io-index)" = "5ec4ab2cf0b27e111e266e161cf7f9efd20125a161190da1c0945c4a4408fef3"
+"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"
+"checksum wasm-bindgen-backend 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)" = "d967d37bf6c16cca2973ca3af071d0a2523392e4a594548155d89a678f4237cd"
+"checksum wasm-bindgen-macro 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)" = "8bd151b63e1ea881bb742cd20e1d6127cef28399558f3b5d415289bc41eee3a4"
+"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 +1,20 @@
+[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"
+
+[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 +1,27 @@
+//! 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.
+//!
+//! 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(ptr: *mut u8) {
+    let size_and_data_ptr = ptr.sub(size_of::<usize>());
+    let size = *(size_and_data_ptr as *const usize);
+    dealloc(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
+)
+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\`"
+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 ./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 m={},r;for(r in e)e.hasOwnProperty(r)&&(m[r]=e[r]);var u=!1,v=!1,aa=!1,ba=!1,ca=!1;u="object"===typeof window;v="function"===typeof importScripts;aa=(ba="object"===typeof process&&"object"===typeof process.versions&&"string"===typeof process.versions.node)&&!u&&!v;ca=!u&&!aa&&!v;var w="",da,x,ea,fa;
+if(aa)w=__dirname+"/",da=function(a,b){ea||(ea=require("fs"));fa||(fa=require("path"));a=fa.normalize(a);return ea.readFileSync(a,b?null:"utf8")},x=function(a){a=da(a,!0);a.buffer||(a=new Uint8Array(a));a.buffer||y("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",y),e.inspect=function(){return"[Emscripten Module object]"};else if(ca)"undefined"!=
+typeof read&&(da=function(a){return read(a)}),x=function(a){if("function"===typeof readbuffer)return new Uint8Array(readbuffer(a));a=read(a,"binary");"object"===typeof a||y("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(u||v)v?w=self.location.href:document.currentScript&&(w=document.currentScript.src),_scriptDir&&(w=_scriptDir),0!==w.indexOf("blob:")?
+w=w.substr(0,w.lastIndexOf("/")+1):w="",da=function(a){var b=new XMLHttpRequest;b.open("GET",a,!1);b.send(null);return b.responseText},v&&(x=function(a){var b=new XMLHttpRequest;b.open("GET",a,!1);b.responseType="arraybuffer";b.send(null);return new Uint8Array(b.response)});var ha=e.print||console.log.bind(console),z=e.printErr||console.warn.bind(console);for(r in m)m.hasOwnProperty(r)&&(e[r]=m[r]);m=null;var ia={"f64-rem":function(a,b){return a%b},"debugger":function(){}},A;e.wasmBinary&&(A=e.wasmBinary);
+"object"!==typeof WebAssembly&&z("no native wasm support detected");var B,ja=new WebAssembly.Table({initial:230,maximum:230,element:"anyfunc"}),ka=!1,la="undefined"!==typeof TextDecoder?new TextDecoder("utf8"):void 0;
+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 h=a[b++]&63;if(192==(f&224))d+=String.fromCharCode((f&31)<<6|h);else{var g=a[b++]&63;f=224==(f&240)?(f&15)<<12|h<<6|g:(f&7)<<18|h<<12|g<<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=C;if(0<c){c=b+c-1;for(var f=0;f<a.length;++f){var h=a.charCodeAt(f);if(55296<=h&&57343>=h){var g=a.charCodeAt(++f);h=65536+((h&1023)<<10)|g&1023}if(127>=h){if(b>=c)break;d[b++]=h}else{if(2047>=h){if(b+1>=c)break;d[b++]=192|h>>6}else{if(65535>=h){if(b+2>=c)break;d[b++]=224|h>>12}else{if(b+3>=c)break;d[b++]=240|h>>18;d[b++]=128|h>>12&63}d[b++]=128|h>>6&63}d[b++]=128|h&63}}d[b]=0}}"undefined"!==typeof TextDecoder&&new TextDecoder("utf-16le");
+function oa(a){0<a%65536&&(a+=65536-a%65536);return a}var buffer,pa,C,qa,ra,D,E,sa,ta;function ua(a){buffer=a;e.HEAP8=pa=new Int8Array(a);e.HEAP16=qa=new Int16Array(a);e.HEAP32=D=new Int32Array(a);e.HEAPU8=C=new Uint8Array(a);e.HEAPU16=ra=new Uint16Array(a);e.HEAPU32=E=new Uint32Array(a);e.HEAPF32=sa=new Float32Array(a);e.HEAPF64=ta=new Float64Array(a)}var va=e.TOTAL_MEMORY||16777216;e.wasmMemory?B=e.wasmMemory:B=new WebAssembly.Memory({initial:va/65536});B&&(buffer=B.buffer);va=buffer.byteLength;
+ua(buffer);D[3824]=5258368;function wa(a){for(;0<a.length;){var b=a.shift();if("function"==typeof b)b();else{var c=b.ra;"number"===typeof c?void 0===b.ia?e.dynCall_v(c):e.dynCall_vi(c,b.ia):c(void 0===b.ia?null:b.ia)}}}var xa=[],ya=[],za=[],Aa=[];function Ba(){var a=e.preRun.shift();xa.unshift(a)}var G=0,Ca=null,H=null;e.preloadedImages={};e.preloadedAudios={};
+function y(a){if(e.onAbort)e.onAbort(a);ha(a);z(a);ka=!0;throw new WebAssembly.RuntimeError("abort("+a+"). Build with -s ASSERTIONS=1 for more info.");}function Da(){var a=I;return String.prototype.startsWith?a.startsWith("data:application/octet-stream;base64,"):0===a.indexOf("data:application/octet-stream;base64,")}var I="webp_dec.wasm";if(!Da()){var Ea=I;I=e.locateFile?e.locateFile(Ea,w):w+Ea}
+function Fa(){try{if(A)return new Uint8Array(A);if(x)return x(I);throw"both async and sync fetching of the wasm failed";}catch(a){y(a)}}function Ga(){return A||!u&&!v||"function"!==typeof fetch?new Promise(function(a){a(Fa())}):fetch(I,{credentials:"same-origin"}).then(function(a){if(!a.ok)throw"failed to load wasm binary file at '"+I+"'";return a.arrayBuffer()}).catch(function(){return Fa()})}
+e.asm=function(){function a(a){e.asm=a.exports;G--;e.monitorRunDependencies&&e.monitorRunDependencies(G);0==G&&(null!==Ca&&(clearInterval(Ca),Ca=null),H&&(a=H,H=null,a()))}function b(b){a(b.instance)}function c(a){return Ga().then(function(a){return WebAssembly.instantiate(a,d)}).then(a,function(a){z("failed to asynchronously prepare wasm: "+a);y(a)})}var d={env:Ha,wasi_unstable:Ha,global:{NaN:NaN,Infinity:Infinity},"global.Math":Math,asm2wasm:ia};G++;e.monitorRunDependencies&&e.monitorRunDependencies(G);
+if(e.instantiateWasm)try{return e.instantiateWasm(d,a)}catch(f){return z("Module.instantiateWasm callback failed with error: "+f),!1}(function(){if(A||"function"!==typeof WebAssembly.instantiateStreaming||Da()||"function"!==typeof fetch)return c(b);fetch(I,{credentials:"same-origin"}).then(function(a){return WebAssembly.instantiateStreaming(a,d).then(b,function(a){z("wasm streaming compile failed: "+a);z("falling back to ArrayBuffer instantiation");c(b)})})})();return{}};ya.push({ra:function(){Ia()}});
+var Ja=[null,[],[]];function Ka(){return 0}function La(){return 0}function Ma(a,b,c,d){try{for(var f=0,h=0;h<c;h++){for(var g=D[b+8*h>>2],k=D[b+(8*h+4)>>2],p=0;p<k;p++){var q=C[g+p],l=Ja[a];0===q||10===q?((1===a?ha:z)(ma(l,0)),l.length=0):l.push(q)}f+=k}D[d>>2]=f;return 0}catch(t){return"undefined"!==typeof FS&&t instanceof FS.za||y(t),t.Aa}}function Na(a){switch(a){case 1:return 0;case 2:return 1;case 4:return 2;case 8:return 3;default:throw new TypeError("Unknown type size: "+a);}}var Oa=void 0;
+function J(a){for(var b="";C[a];)b+=Oa[C[a++]];return b}var K={},L={},Pa={};function Qa(a){if(void 0===a)return"_unknown";a=a.replace(/[^a-zA-Z0-9_]/g,"$");var b=a.charCodeAt(0);return 48<=b&&57>=b?"_"+a:a}function Ra(a,b){a=Qa(a);return(new Function("body","return function "+a+'() {\n    "use strict";    return body.apply(this, arguments);\n};\n'))(b)}
+function Sa(a){var b=Error,c=Ra(a,function(b){this.name=a;this.message=b;b=Error(b).stack;void 0!==b&&(this.stack=this.toString()+"\n"+b.replace(/^Error(:[^\n]*)?\n/,""))});c.prototype=Object.create(b.prototype);c.prototype.constructor=c;c.prototype.toString=function(){return void 0===this.message?this.name:this.name+": "+this.message};return c}var M=void 0;function P(a){throw new M(a);}var Ta=void 0;function Ua(a){throw new Ta(a);}
+function Va(a,b,c){function d(b){b=c(b);b.length!==a.length&&Ua("Mismatched type converter count");for(var d=0;d<a.length;++d)Q(a[d],b[d])}a.forEach(function(a){Pa[a]=b});var f=Array(b.length),h=[],g=0;b.forEach(function(a,b){L.hasOwnProperty(a)?f[b]=L[a]:(h.push(a),K.hasOwnProperty(a)||(K[a]=[]),K[a].push(function(){f[b]=L[a];++g;g===h.length&&d(f)}))});0===h.length&&d(f)}
+function Q(a,b,c){c=c||{};if(!("argPackAdvance"in b))throw new TypeError("registerType registeredInstance requires argPackAdvance");var d=b.name;a||P('type "'+d+'" must have a positive integer typeid pointer');if(L.hasOwnProperty(a)){if(c.ua)return;P("Cannot register type '"+d+"' twice")}L[a]=b;delete Pa[a];K.hasOwnProperty(a)&&(b=K[a],delete K[a],b.forEach(function(a){a()}))}function Wa(a){return{count:a.count,da:a.da,ea:a.ea,T:a.T,V:a.V,W:a.W,X:a.X}}
+function Xa(a){P(a.S.V.U.name+" instance already deleted")}var Ya=!1;function Za(){}function $a(a){--a.count.value;0===a.count.value&&(a.W?a.X.ba(a.W):a.V.U.ba(a.T))}function S(a){if("undefined"===typeof FinalizationGroup)return S=function(a){return a},a;Ya=new FinalizationGroup(function(a){for(var b=a.next();!b.done;b=a.next())b=b.value,b.T?$a(b):console.warn("object already deleted: "+b.T)});S=function(a){Ya.register(a,a.S,a.S);return a};Za=function(a){Ya.unregister(a.S)};return S(a)}
+var T=void 0,ab=[];function bb(){for(;ab.length;){var a=ab.pop();a.S.da=!1;a["delete"]()}}function U(){}var cb={};function db(a,b){var c=e;if(void 0===c[a].Z){var d=c[a];c[a]=function(){c[a].Z.hasOwnProperty(arguments.length)||P("Function '"+b+"' called with an invalid number of arguments ("+arguments.length+") - expects one of ("+c[a].Z+")!");return c[a].Z[arguments.length].apply(this,arguments)};c[a].Z=[];c[a].Z[d.oa]=d}}
+function eb(a,b,c){e.hasOwnProperty(a)?((void 0===c||void 0!==e[a].Z&&void 0!==e[a].Z[c])&&P("Cannot register public name '"+a+"' twice"),db(a,a),e.hasOwnProperty(c)&&P("Cannot register multiple overloads of a function with the same number of arguments ("+c+")!"),e[a].Z[c]=b):(e[a]=b,void 0!==c&&(e[a].Ca=c))}function fb(a,b,c,d,f,h,g,k){this.name=a;this.constructor=b;this.aa=c;this.ba=d;this.Y=f;this.sa=h;this.fa=g;this.qa=k}
+function gb(a,b,c){for(;b!==c;)b.fa||P("Expected null or instance of "+c.name+", got an instance of "+b.name),a=b.fa(a),b=b.Y;return a}function hb(a,b){if(null===b)return this.ja&&P("null is not a valid "+this.name),0;b.S||P('Cannot pass "'+V(b)+'" as a '+this.name);b.S.T||P("Cannot pass deleted object as a pointer of type "+this.name);return gb(b.S.T,b.S.V.U,this.U)}
+function ib(a,b){if(null===b){this.ja&&P("null is not a valid "+this.name);if(this.ha){var c=this.wa();null!==a&&a.push(this.ba,c);return c}return 0}b.S||P('Cannot pass "'+V(b)+'" as a '+this.name);b.S.T||P("Cannot pass deleted object as a pointer of type "+this.name);!this.ga&&b.S.V.ga&&P("Cannot convert argument of type "+(b.S.X?b.S.X.name:b.S.V.name)+" to parameter type "+this.name);c=gb(b.S.T,b.S.V.U,this.U);if(this.ha)switch(void 0===b.S.W&&P("Passing raw pointer to smart pointer is illegal"),
+this.ya){case 0:b.S.X===this?c=b.S.W:P("Cannot convert argument of type "+(b.S.X?b.S.X.name:b.S.V.name)+" to parameter type "+this.name);break;case 1:c=b.S.W;break;case 2:if(b.S.X===this)c=b.S.W;else{var d=b.clone();c=this.xa(c,jb(function(){d["delete"]()}));null!==a&&a.push(this.ba,c)}break;default:P("Unsupporting sharing policy")}return c}
+function mb(a,b){if(null===b)return this.ja&&P("null is not a valid "+this.name),0;b.S||P('Cannot pass "'+V(b)+'" as a '+this.name);b.S.T||P("Cannot pass deleted object as a pointer of type "+this.name);b.S.V.ga&&P("Cannot convert argument of type "+b.S.V.name+" to parameter type "+this.name);return gb(b.S.T,b.S.V.U,this.U)}function nb(a){return this.fromWireType(E[a>>2])}function ob(a,b,c){if(b===c)return a;if(void 0===c.Y)return null;a=ob(a,b,c.Y);return null===a?null:c.qa(a)}var pb={};
+function qb(a,b){for(void 0===b&&P("ptr should not be undefined");a.Y;)b=a.fa(b),a=a.Y;return pb[b]}function rb(a,b){b.V&&b.T||Ua("makeClassHandle requires ptr and ptrType");!!b.X!==!!b.W&&Ua("Both smartPtrType and smartPtr must be specified");b.count={value:1};return S(Object.create(a,{S:{value:b}}))}function W(a,b,c,d){this.name=a;this.U=b;this.ja=c;this.ga=d;this.ha=!1;this.ba=this.xa=this.wa=this.na=this.ya=this.va=void 0;void 0!==b.Y?this.toWireType=ib:(this.toWireType=d?hb:mb,this.$=null)}
+function sb(a,b,c){e.hasOwnProperty(a)||Ua("Replacing nonexistant public symbol");void 0!==e[a].Z&&void 0!==c?e[a].Z[c]=b:(e[a]=b,e[a].oa=c)}
+function X(a,b){a=J(a);if(void 0!==e["FUNCTION_TABLE_"+a])var c=e["FUNCTION_TABLE_"+a][b];else if("undefined"!==typeof FUNCTION_TABLE)c=FUNCTION_TABLE[b];else{c=e["dynCall_"+a];void 0===c&&(c=e["dynCall_"+a.replace(/f/g,"d")],void 0===c&&P("No dynCall invoker for signature: "+a));for(var d=[],f=1;f<a.length;++f)d.push("a"+f);f="return function "+("dynCall_"+a+"_"+b)+"("+d.join(", ")+") {\n";f+="    return dynCall(rawFunction"+(d.length?", ":"")+d.join(", ")+");\n";c=(new Function("dynCall","rawFunction",
+f+"};\n"))(c,b)}"function"!==typeof c&&P("unknown function pointer with signature "+a+": "+b);return c}var tb=void 0;function ub(a){a=vb(a);var b=J(a);Y(a);return b}function wb(a,b){function c(a){f[a]||L[a]||(Pa[a]?Pa[a].forEach(c):(d.push(a),f[a]=!0))}var d=[],f={};b.forEach(c);throw new tb(a+": "+d.map(ub).join([", "]));}function xb(a){for(;a.length;){var b=a.pop();a.pop()(b)}}
+function yb(a,b,c){a instanceof Object||P(c+' with invalid "this": '+a);a instanceof b.U.constructor||P(c+' incompatible with "this" of type '+a.constructor.name);a.S.T||P("cannot call emscripten binding method "+c+" on deleted object");return gb(a.S.T,a.S.V.U,b.U)}var zb=[],Z=[{},{value:void 0},{value:null},{value:!0},{value:!1}];function Ab(a){4<a&&0===--Z[a].ka&&(Z[a]=void 0,zb.push(a))}
+function jb(a){switch(a){case void 0:return 1;case null:return 2;case !0:return 3;case !1:return 4;default:var b=zb.length?zb.pop():Z.length;Z[b]={ka:1,value:a};return b}}function V(a){if(null===a)return"null";var b=typeof a;return"object"===b||"array"===b||"function"===b?a.toString():""+a}function Bb(a,b){switch(b){case 2:return function(a){return this.fromWireType(sa[a>>2])};case 3:return function(a){return this.fromWireType(ta[a>>3])};default:throw new TypeError("Unknown float type: "+a);}}
+function Cb(a){var b=Function;if(!(b instanceof Function))throw new TypeError("new_ called with constructor type "+typeof b+" which is not a function");var c=Ra(b.name||"unknownFunctionName",function(){});c.prototype=b.prototype;c=new c;a=b.apply(c,a);return a instanceof Object?a:c}function Db(a,b){for(var c=[],d=0;d<a;d++)c.push(D[(b>>2)+d]);return c}
+function Eb(a,b,c){switch(b){case 0:return c?function(a){return pa[a]}:function(a){return C[a]};case 1:return c?function(a){return qa[a>>1]}:function(a){return ra[a>>1]};case 2:return c?function(a){return D[a>>2]}:function(a){return E[a>>2]};default:throw new TypeError("Unknown integer type: "+a);}}function Fb(){return pa.length}for(var Gb=Array(256),Hb=0;256>Hb;++Hb)Gb[Hb]=String.fromCharCode(Hb);Oa=Gb;M=e.BindingError=Sa("BindingError");Ta=e.InternalError=Sa("InternalError");
+U.prototype.isAliasOf=function(a){if(!(this instanceof U&&a instanceof U))return!1;var b=this.S.V.U,c=this.S.T,d=a.S.V.U;for(a=a.S.T;b.Y;)c=b.fa(c),b=b.Y;for(;d.Y;)a=d.fa(a),d=d.Y;return b===d&&c===a};U.prototype.clone=function(){this.S.T||Xa(this);if(this.S.ea)return this.S.count.value+=1,this;var a=S(Object.create(Object.getPrototypeOf(this),{S:{value:Wa(this.S)}}));a.S.count.value+=1;a.S.da=!1;return a};
+U.prototype["delete"]=function(){this.S.T||Xa(this);this.S.da&&!this.S.ea&&P("Object already scheduled for deletion");Za(this);$a(this.S);this.S.ea||(this.S.W=void 0,this.S.T=void 0)};U.prototype.isDeleted=function(){return!this.S.T};U.prototype.deleteLater=function(){this.S.T||Xa(this);this.S.da&&!this.S.ea&&P("Object already scheduled for deletion");ab.push(this);1===ab.length&&T&&T(bb);this.S.da=!0;return this};W.prototype.ta=function(a){this.na&&(a=this.na(a));return a};
+W.prototype.ma=function(a){this.ba&&this.ba(a)};W.prototype.argPackAdvance=8;W.prototype.readValueFromPointer=nb;W.prototype.deleteObject=function(a){if(null!==a)a["delete"]()};
+W.prototype.fromWireType=function(a){function b(){return this.ha?rb(this.U.aa,{V:this.va,T:c,X:this,W:a}):rb(this.U.aa,{V:this,T:a})}var c=this.ta(a);if(!c)return this.ma(a),null;var d=qb(this.U,c);if(void 0!==d){if(0===d.S.count.value)return d.S.T=c,d.S.W=a,d.clone();d=d.clone();this.ma(a);return d}d=this.U.sa(c);d=cb[d];if(!d)return b.call(this);d=this.ga?d.pa:d.pointerType;var f=ob(c,this.U,d.U);return null===f?b.call(this):this.ha?rb(d.U.aa,{V:d,T:f,X:this,W:a}):rb(d.U.aa,{V:d,T:f})};
+e.getInheritedInstanceCount=function(){return Object.keys(pb).length};e.getLiveInheritedInstances=function(){var a=[],b;for(b in pb)pb.hasOwnProperty(b)&&a.push(pb[b]);return a};e.flushPendingDeletes=bb;e.setDelayFunction=function(a){T=a;ab.length&&T&&T(bb)};tb=e.UnboundTypeError=Sa("UnboundTypeError");e.count_emval_handles=function(){for(var a=0,b=5;b<Z.length;++b)void 0!==Z[b]&&++a;return a};e.get_first_emval=function(){for(var a=5;a<Z.length;++a)if(void 0!==Z[a])return Z[a];return null};
+var Ha={w:function(){return Ka.apply(null,arguments)},o:function(){return La.apply(null,arguments)},q:function(){return Ma.apply(null,arguments)},n:function(a,b,c,d,f){var h=Na(c);b=J(b);Q(a,{name:b,fromWireType:function(a){return!!a},toWireType:function(a,b){return b?d:f},argPackAdvance:8,readValueFromPointer:function(a){if(1===c)var d=pa;else if(2===c)d=qa;else if(4===c)d=D;else throw new TypeError("Unknown boolean type size: "+b);return this.fromWireType(d[a>>h])},$:null})},m:function(a,b,c,d,
+f,h,g,k,p,q,l,t,N){l=J(l);h=X(f,h);k&&(k=X(g,k));q&&(q=X(p,q));N=X(t,N);var F=Qa(l);eb(F,function(){wb("Cannot construct "+l+" due to unbound types",[d])});Va([a,b,c],d?[d]:[],function(b){b=b[0];if(d){var c=b.U;var f=c.aa}else f=U.prototype;b=Ra(F,function(){if(Object.getPrototypeOf(this)!==p)throw new M("Use 'new' to construct "+l);if(void 0===g.la)throw new M(l+" has no accessible constructor");var a=g.la[arguments.length];if(void 0===a)throw new M("Tried to invoke ctor of "+l+" with invalid number of parameters ("+
+arguments.length+") - expected ("+Object.keys(g.la).toString()+") parameters instead!");return a.apply(this,arguments)});var p=Object.create(f,{constructor:{value:b}});b.prototype=p;var g=new fb(l,b,p,N,c,h,k,q);c=new W(l,g,!0,!1);f=new W(l+"*",g,!1,!1);var t=new W(l+" const*",g,!1,!0);cb[a]={pointerType:f,pa:t};sb(F,b);return[c,f,t]})},e:function(a,b,c,d,f,h,g,k,p,q){b=J(b);f=X(d,f);Va([],[a],function(a){a=a[0];var d=a.name+"."+b,l={get:function(){wb("Cannot access "+d+" due to unbound types",[c,
+g])},enumerable:!0,configurable:!0};p?l.set=function(){wb("Cannot access "+d+" due to unbound types",[c,g])}:l.set=function(){P(d+" is a read-only property")};Object.defineProperty(a.U.aa,b,l);Va([],p?[c,g]:[c],function(c){var g=c[0],l={get:function(){var b=yb(this,a,d+" getter");return g.fromWireType(f(h,b))},enumerable:!0};if(p){p=X(k,p);var t=c[1];l.set=function(b){var c=yb(this,a,d+" setter"),f=[];p(q,c,t.toWireType(f,b));xb(f)}}Object.defineProperty(a.U.aa,b,l);return[]});return[]})},l:function(a,
+b){b=J(b);Q(a,{name:b,fromWireType:function(a){var b=Z[a].value;Ab(a);return b},toWireType:function(a,b){return jb(b)},argPackAdvance:8,readValueFromPointer:nb,$:null})},f:function(a,b,c){c=Na(c);b=J(b);Q(a,{name:b,fromWireType:function(a){return a},toWireType:function(a,b){if("number"!==typeof b&&"boolean"!==typeof b)throw new TypeError('Cannot convert "'+V(b)+'" to '+this.name);return b},argPackAdvance:8,readValueFromPointer:Bb(b,c),$:null})},d:function(a,b,c,d,f,h){var g=Db(b,c);a=J(a);f=X(d,f);
+eb(a,function(){wb("Cannot call "+a+" due to unbound types",g)},b-1);Va([],g,function(c){var d=[c[0],null].concat(c.slice(1)),g=c=a,l=f,k=d.length;2>k&&P("argTypes array size mismatch! Must at least get return value and 'this' types!");for(var N=null!==d[1]&&!1,F=!1,n=1;n<d.length;++n)if(null!==d[n]&&void 0===d[n].$){F=!0;break}var kb="void"!==d[0].name,O="",R="";for(n=0;n<k-2;++n)O+=(0!==n?", ":"")+"arg"+n,R+=(0!==n?", ":"")+"arg"+n+"Wired";g="return function "+Qa(g)+"("+O+") {\nif (arguments.length !== "+
+(k-2)+") {\nthrowBindingError('function "+g+" called with ' + arguments.length + ' arguments, expected "+(k-2)+" args!');\n}\n";F&&(g+="var destructors = [];\n");var lb=F?"destructors":"null";O="throwBindingError invoker fn runDestructors retType classParam".split(" ");l=[P,l,h,xb,d[0],d[1]];N&&(g+="var thisWired = classParam.toWireType("+lb+", this);\n");for(n=0;n<k-2;++n)g+="var arg"+n+"Wired = argType"+n+".toWireType("+lb+", arg"+n+"); // "+d[n+2].name+"\n",O.push("argType"+n),l.push(d[n+2]);N&&
+(R="thisWired"+(0<R.length?", ":"")+R);g+=(kb?"var rv = ":"")+"invoker(fn"+(0<R.length?", ":"")+R+");\n";if(F)g+="runDestructors(destructors);\n";else for(n=N?1:2;n<d.length;++n)k=1===n?"thisWired":"arg"+(n-2)+"Wired",null!==d[n].$&&(g+=k+"_dtor("+k+"); // "+d[n].name+"\n",O.push(k+"_dtor"),l.push(d[n].$));kb&&(g+="var ret = retType.fromWireType(rv);\nreturn ret;\n");O.push(g+"}\n");d=Cb(O).apply(null,l);sb(c,d,b-1);return[]})},c:function(a,b,c,d,f){function h(a){return a}b=J(b);-1===f&&(f=4294967295);
+var g=Na(c);if(0===d){var k=32-8*c;h=function(a){return a<<k>>>k}}var p=-1!=b.indexOf("unsigned");Q(a,{name:b,fromWireType:h,toWireType:function(a,c){if("number"!==typeof c&&"boolean"!==typeof c)throw new TypeError('Cannot convert "'+V(c)+'" to '+this.name);if(c<d||c>f)throw new TypeError('Passing a number "'+V(c)+'" from JS side to C/C++ side to an argument of type "'+b+'", which is outside the valid range ['+d+", "+f+"]!");return p?c>>>0:c|0},argPackAdvance:8,readValueFromPointer:Eb(b,g,0!==d),
+$:null})},b:function(a,b,c){function d(a){a>>=2;var b=E;return new f(b.buffer,b[a+1],b[a])}var f=[Int8Array,Uint8Array,Int16Array,Uint16Array,Int32Array,Uint32Array,Float32Array,Float64Array][b];c=J(c);Q(a,{name:c,fromWireType:d,argPackAdvance:8,readValueFromPointer:d},{ua:!0})},k:function(a,b){b=J(b);var c="std::string"===b;Q(a,{name:b,fromWireType:function(a){var b=E[a>>2];if(c){var d=C[a+4+b],g=0;0!=d&&(g=d,C[a+4+b]=0);var k=a+4;for(d=0;d<=b;++d){var p=a+4+d;if(0==C[p]){k=k?ma(C,k,void 0):"";if(void 0===
+q)var q=k;else q+=String.fromCharCode(0),q+=k;k=p+1}}0!=g&&(C[a+4+b]=g)}else{q=Array(b);for(d=0;d<b;++d)q[d]=String.fromCharCode(C[a+4+d]);q=q.join("")}Y(a);return q},toWireType:function(a,b){b instanceof ArrayBuffer&&(b=new Uint8Array(b));var d="string"===typeof b;d||b instanceof Uint8Array||b instanceof Uint8ClampedArray||b instanceof Int8Array||P("Cannot pass non-string to std::string");var f=(c&&d?function(){for(var a=0,c=0;c<b.length;++c){var d=b.charCodeAt(c);55296<=d&&57343>=d&&(d=65536+((d&
+1023)<<10)|b.charCodeAt(++c)&1023);127>=d?++a:a=2047>=d?a+2:65535>=d?a+3:a+4}return a}:function(){return b.length})(),k=Ib(4+f+1);E[k>>2]=f;if(c&&d)na(b,k+4,f+1);else if(d)for(d=0;d<f;++d){var p=b.charCodeAt(d);255<p&&(Y(k),P("String has UTF-16 code units that do not fit in 8 bits"));C[k+4+d]=p}else for(d=0;d<f;++d)C[k+4+d]=b[d];null!==a&&a.push(Y,k);return k},argPackAdvance:8,readValueFromPointer:nb,$:function(a){Y(a)}})},v:function(a,b,c){c=J(c);if(2===b){var d=function(){return ra};var f=1}else 4===
+b&&(d=function(){return E},f=2);Q(a,{name:c,fromWireType:function(a){for(var b=d(),c=E[a>>2],h=Array(c),q=a+4>>f,l=0;l<c;++l)h[l]=String.fromCharCode(b[q+l]);Y(a);return h.join("")},toWireType:function(a,c){var h=c.length,g=Ib(4+h*b),q=d();E[g>>2]=h;for(var l=g+4>>f,t=0;t<h;++t)q[l+t]=c.charCodeAt(t);null!==a&&a.push(Y,g);return g},argPackAdvance:8,readValueFromPointer:nb,$:function(a){Y(a)}})},u:function(a,b){b=J(b);Q(a,{Ba:!0,name:b,argPackAdvance:0,fromWireType:function(){},toWireType:function(){}})},
+j:Ab,t:function(a){4<a&&(Z[a].ka+=1)},i:function(a,b){var c=L[a];void 0===c&&P("_emval_take_value has unknown type "+ub(a));a=c.readValueFromPointer(b);return jb(a)},__memory_base:1024,__table_base:0,h:function(){y()},s:Fb,r:function(a,b,c){C.set(C.subarray(b,b+c),a)},p:function(a){if(2147418112<a)return!1;for(var b=Math.max(Fb(),16777216);b<a;)536870912>=b?b=oa(2*b):b=Math.min(oa((3*b+2147483648)/4),2147418112);a:{try{B.grow(b-buffer.byteLength+65535>>16);ua(B.buffer);var c=1;break a}catch(d){}c=
+void 0}return c?!0:!1},a:y,memory:B,g:function(){},table:ja},Jb=e.asm({},Ha,buffer);e.asm=Jb;e.___embind_register_native_and_builtin_types=function(){return e.asm.x.apply(null,arguments)};var vb=e.___getTypeName=function(){return e.asm.y.apply(null,arguments)},Y=e._free=function(){return e.asm.z.apply(null,arguments)},Ib=e._malloc=function(){return e.asm.A.apply(null,arguments)},Ia=e.globalCtors=function(){return e.asm.R.apply(null,arguments)};e.dynCall_i=function(){return e.asm.B.apply(null,arguments)};
+e.dynCall_ii=function(){return e.asm.C.apply(null,arguments)};e.dynCall_iidiiii=function(){return e.asm.D.apply(null,arguments)};e.dynCall_iii=function(){return e.asm.E.apply(null,arguments)};e.dynCall_iiii=function(){return e.asm.F.apply(null,arguments)};e.dynCall_iiiiiii=function(){return e.asm.G.apply(null,arguments)};e.dynCall_jiiii=function(){return e.asm.H.apply(null,arguments)};e.dynCall_jiji=function(){return e.asm.I.apply(null,arguments)};
+e.dynCall_v=function(){return e.asm.J.apply(null,arguments)};e.dynCall_vi=function(){return e.asm.K.apply(null,arguments)};e.dynCall_vii=function(){return e.asm.L.apply(null,arguments)};e.dynCall_viii=function(){return e.asm.M.apply(null,arguments)};e.dynCall_viiii=function(){return e.asm.N.apply(null,arguments)};e.dynCall_viiiii=function(){return e.asm.O.apply(null,arguments)};e.dynCall_viiiiii=function(){return e.asm.P.apply(null,arguments)};
+e.dynCall_viiiiiiiii=function(){return e.asm.Q.apply(null,arguments)};e.asm=Jb;var Kb;e.then=function(a){if(Kb)a(e);else{var b=e.onRuntimeInitialized;e.onRuntimeInitialized=function(){b&&b();a(e)}}return e};H=function Lb(){Kb||Mb();Kb||(H=Lb)};
+function Mb(){function a(){if(!Kb&&(Kb=!0,!ka)){wa(ya);wa(za);if(e.onRuntimeInitialized)e.onRuntimeInitialized();if(e.postRun)for("function"==typeof e.postRun&&(e.postRun=[e.postRun]);e.postRun.length;){var a=e.postRun.shift();Aa.unshift(a)}wa(Aa)}}if(!(0<G)){if(e.preRun)for("function"==typeof e.preRun&&(e.preRun=[e.preRun]);e.preRun.length;)Ba();wa(xa);0<G||(e.setStatus?(e.setStatus("Running..."),setTimeout(function(){setTimeout(function(){e.setStatus("")},1);a()},1)):a())}}e.run=Mb;
+if(e.preInit)for("function"==typeof e.preInit&&(e.preInit=[e.preInit]);0<e.preInit.length;)e.preInit.pop()();Mb();
+
+
+  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
+)
+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\`"
+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 ./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 +1,70 @@
+
+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 d;d||(d=typeof webp_enc !== 'undefined' ? webp_enc : {});var n={},q;for(q in d)d.hasOwnProperty(q)&&(n[q]=d[q]);var r=!1,t=!1,aa=!1,ba=!1,ca=!1;r="object"===typeof window;t="function"===typeof importScripts;aa=(ba="object"===typeof process&&"object"===typeof process.versions&&"string"===typeof process.versions.node)&&!r&&!t;ca=!r&&!aa&&!t;var u="",v,x,fa,ha;
+if(aa)u=__dirname+"/",v=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=v(a,!0);a.buffer||(a=new Uint8Array(a));a.buffer||y("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",y),d.inspect=function(){return"[Emscripten Module object]"};else if(ca)"undefined"!=
+typeof read&&(v=function(a){return read(a)}),x=function(a){if("function"===typeof readbuffer)return new Uint8Array(readbuffer(a));a=read(a,"binary");"object"===typeof a||y("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(r||t)t?u=self.location.href:document.currentScript&&(u=document.currentScript.src),_scriptDir&&(u=_scriptDir),0!==u.indexOf("blob:")?
+u=u.substr(0,u.lastIndexOf("/")+1):u="",v=function(a){var b=new XMLHttpRequest;b.open("GET",a,!1);b.send(null);return b.responseText},t&&(x=function(a){var b=new XMLHttpRequest;b.open("GET",a,!1);b.responseType="arraybuffer";b.send(null);return new Uint8Array(b.response)});var ia=d.print||console.log.bind(console),z=d.printErr||console.warn.bind(console);for(q in n)n.hasOwnProperty(q)&&(d[q]=n[q]);n=null;var ja={"f64-rem":function(a,b){return a%b},"debugger":function(){}},A;d.wasmBinary&&(A=d.wasmBinary);
+"object"!==typeof WebAssembly&&z("no native wasm support detected");var C,ka=new WebAssembly.Table({initial:256,maximum:256,element:"anyfunc"}),la=!1,ma="undefined"!==typeof TextDecoder?new TextDecoder("utf8"):void 0;
+function na(a,b,c){var e=b+c;for(c=b;a[c]&&!(c>=e);)++c;if(16<c-b&&a.subarray&&ma)return ma.decode(a.subarray(b,c));for(e="";b<c;){var f=a[b++];if(f&128){var g=a[b++]&63;if(192==(f&224))e+=String.fromCharCode((f&31)<<6|g);else{var k=a[b++]&63;f=224==(f&240)?(f&15)<<12|g<<6|k:(f&7)<<18|g<<12|k<<6|a[b++]&63;65536>f?e+=String.fromCharCode(f):(f-=65536,e+=String.fromCharCode(55296|f>>10,56320|f&1023))}}else e+=String.fromCharCode(f)}return e}
+function oa(a,b,c){var e=D;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 k=a.charCodeAt(++f);g=65536+((g&1023)<<10)|k&1023}if(127>=g){if(b>=c)break;e[b++]=g}else{if(2047>=g){if(b+1>=c)break;e[b++]=192|g>>6}else{if(65535>=g){if(b+2>=c)break;e[b++]=224|g>>12}else{if(b+3>=c)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}}"undefined"!==typeof TextDecoder&&new TextDecoder("utf-16le");
+function pa(a){0<a%65536&&(a+=65536-a%65536);return a}var buffer,E,D,F,G,H,I,qa,ra;function ta(a){buffer=a;d.HEAP8=E=new Int8Array(a);d.HEAP16=F=new Int16Array(a);d.HEAP32=H=new Int32Array(a);d.HEAPU8=D=new Uint8Array(a);d.HEAPU16=G=new Uint16Array(a);d.HEAPU32=I=new Uint32Array(a);d.HEAPF32=qa=new Float32Array(a);d.HEAPF64=ra=new Float64Array(a)}var ua=d.TOTAL_MEMORY||16777216;d.wasmMemory?C=d.wasmMemory:C=new WebAssembly.Memory({initial:ua/65536});C&&(buffer=C.buffer);ua=buffer.byteLength;ta(buffer);
+H[9180]=5279792;function K(a){for(;0<a.length;){var b=a.shift();if("function"==typeof b)b();else{var c=b.ja;"number"===typeof c?void 0===b.da?d.dynCall_v(c):d.dynCall_vi(c,b.da):c(void 0===b.da?null:b.da)}}}var va=[],wa=[],xa=[],ya=[];function za(){var a=d.preRun.shift();va.unshift(a)}var M=0,Aa=null,N=null;d.preloadedImages={};d.preloadedAudios={};
+function y(a){if(d.onAbort)d.onAbort(a);ia(a);z(a);la=!0;throw new WebAssembly.RuntimeError("abort("+a+"). Build with -s ASSERTIONS=1 for more info.");}function Ba(){var a=O;return String.prototype.startsWith?a.startsWith("data:application/octet-stream;base64,"):0===a.indexOf("data:application/octet-stream;base64,")}var O="webp_enc.wasm";if(!Ba()){var Ca=O;O=d.locateFile?d.locateFile(Ca,u):u+Ca}
+function Da(){try{if(A)return new Uint8Array(A);if(x)return x(O);throw"both async and sync fetching of the wasm failed";}catch(a){y(a)}}function Ea(){return A||!r&&!t||"function"!==typeof fetch?new Promise(function(a){a(Da())}):fetch(O,{credentials:"same-origin"}).then(function(a){if(!a.ok)throw"failed to load wasm binary file at '"+O+"'";return a.arrayBuffer()}).catch(function(){return Da()})}
+d.asm=function(){function a(a){d.asm=a.exports;M--;d.monitorRunDependencies&&d.monitorRunDependencies(M);0==M&&(null!==Aa&&(clearInterval(Aa),Aa=null),N&&(a=N,N=null,a()))}function b(b){a(b.instance)}function c(a){return Ea().then(function(a){return WebAssembly.instantiate(a,e)}).then(a,function(a){z("failed to asynchronously prepare wasm: "+a);y(a)})}var e={env:Fa,wasi_unstable:Fa,global:{NaN:NaN,Infinity:Infinity},"global.Math":Math,asm2wasm:ja};M++;d.monitorRunDependencies&&d.monitorRunDependencies(M);
+if(d.instantiateWasm)try{return d.instantiateWasm(e,a)}catch(f){return z("Module.instantiateWasm callback failed with error: "+f),!1}(function(){if(A||"function"!==typeof WebAssembly.instantiateStreaming||Ba()||"function"!==typeof fetch)return c(b);fetch(O,{credentials:"same-origin"}).then(function(a){return WebAssembly.instantiateStreaming(a,e).then(b,function(a){z("wasm streaming compile failed: "+a);z("falling back to ArrayBuffer instantiation");c(b)})})})();return{}};wa.push({ja:function(){Ga()}});
+var Ha=[null,[],[]];function Ia(){return 0}function Ja(){return 0}function Ka(a,b,c,e){try{for(var f=0,g=0;g<c;g++){for(var k=H[b+8*g>>2],h=H[b+(8*g+4)>>2],p=0;p<h;p++){var l=D[k+p],w=Ha[a];0===l||10===l?((1===a?ia:z)(na(w,0)),w.length=0):w.push(l)}f+=h}H[e>>2]=f;return 0}catch(B){return"undefined"!==typeof FS&&B instanceof FS.ta||y(B),B.ua}}var P={};function La(a){for(;a.length;){var b=a.pop();a.pop()(b)}}function Q(a){return this.fromWireType(I[a>>2])}var R={},S={},Ma={};
+function Na(a){if(void 0===a)return"_unknown";a=a.replace(/[^a-zA-Z0-9_]/g,"$");var b=a.charCodeAt(0);return 48<=b&&57>=b?"_"+a:a}function Oa(a,b){a=Na(a);return(new Function("body","return function "+a+'() {\n    "use strict";    return body.apply(this, arguments);\n};\n'))(b)}
+function Pa(a){var b=Error,c=Oa(a,function(b){this.name=a;this.message=b;b=Error(b).stack;void 0!==b&&(this.stack=this.toString()+"\n"+b.replace(/^Error(:[^\n]*)?\n/,""))});c.prototype=Object.create(b.prototype);c.prototype.constructor=c;c.prototype.toString=function(){return void 0===this.message?this.name:this.name+": "+this.message};return c}var Qa=void 0;
+function Ra(a,b,c){function e(b){b=c(b);if(b.length!==a.length)throw new Qa("Mismatched type converter count");for(var e=0;e<a.length;++e)T(a[e],b[e])}a.forEach(function(a){Ma[a]=b});var f=Array(b.length),g=[],k=0;b.forEach(function(a,b){S.hasOwnProperty(a)?f[b]=S[a]:(g.push(a),R.hasOwnProperty(a)||(R[a]=[]),R[a].push(function(){f[b]=S[a];++k;k===g.length&&e(f)}))});0===g.length&&e(f)}
+function Sa(a){switch(a){case 1:return 0;case 2:return 1;case 4:return 2;case 8:return 3;default:throw new TypeError("Unknown type size: "+a);}}var Ta=void 0;function U(a){for(var b="";D[a];)b+=Ta[D[a++]];return b}var Ua=void 0;function V(a){throw new Ua(a);}
+function T(a,b,c){c=c||{};if(!("argPackAdvance"in b))throw new TypeError("registerType registeredInstance requires argPackAdvance");var e=b.name;a||V('type "'+e+'" must have a positive integer typeid pointer');if(S.hasOwnProperty(a)){if(c.na)return;V("Cannot register type '"+e+"' twice")}S[a]=b;delete Ma[a];R.hasOwnProperty(a)&&(b=R[a],delete R[a],b.forEach(function(a){a()}))}var Va=[],W=[{},{value:void 0},{value:null},{value:!0},{value:!1}];
+function Wa(a){4<a&&0===--W[a].ea&&(W[a]=void 0,Va.push(a))}function Ya(a){switch(a){case void 0:return 1;case null:return 2;case !0:return 3;case !1:return 4;default:var b=Va.length?Va.pop():W.length;W[b]={ea:1,value:a};return b}}
+function Za(a,b){var c=d;if(void 0===c[a].ba){var e=c[a];c[a]=function(){c[a].ba.hasOwnProperty(arguments.length)||V("Function '"+b+"' called with an invalid number of arguments ("+arguments.length+") - expects one of ("+c[a].ba+")!");return c[a].ba[arguments.length].apply(this,arguments)};c[a].ba=[];c[a].ba[e.ha]=e}}
+function $a(a,b,c){d.hasOwnProperty(a)?((void 0===c||void 0!==d[a].ba&&void 0!==d[a].ba[c])&&V("Cannot register public name '"+a+"' twice"),Za(a,a),d.hasOwnProperty(c)&&V("Cannot register multiple overloads of a function with the same number of arguments ("+c+")!"),d[a].ba[c]=b):(d[a]=b,void 0!==c&&(d[a].wa=c))}
+function ab(a,b,c){switch(b){case 0:return function(a){return this.fromWireType((c?E:D)[a])};case 1:return function(a){return this.fromWireType((c?F:G)[a>>1])};case 2:return function(a){return this.fromWireType((c?H:I)[a>>2])};default:throw new TypeError("Unknown integer type: "+a);}}function bb(a){a=cb(a);var b=U(a);X(a);return b}function db(a,b){var c=S[a];void 0===c&&V(b+" has unknown type "+bb(a));return c}
+function eb(a){if(null===a)return"null";var b=typeof a;return"object"===b||"array"===b||"function"===b?a.toString():""+a}function fb(a,b){switch(b){case 2:return function(a){return this.fromWireType(qa[a>>2])};case 3:return function(a){return this.fromWireType(ra[a>>3])};default:throw new TypeError("Unknown float type: "+a);}}
+function gb(a){var b=Function;if(!(b instanceof Function))throw new TypeError("new_ called with constructor type "+typeof b+" which is not a function");var c=Oa(b.name||"unknownFunctionName",function(){});c.prototype=b.prototype;c=new c;a=b.apply(c,a);return a instanceof Object?a:c}function hb(a,b){for(var c=[],e=0;e<a;e++)c.push(H[(b>>2)+e]);return c}
+function Y(a,b){a=U(a);if(void 0!==d["FUNCTION_TABLE_"+a])var c=d["FUNCTION_TABLE_"+a][b];else if("undefined"!==typeof FUNCTION_TABLE)c=FUNCTION_TABLE[b];else{c=d["dynCall_"+a];void 0===c&&(c=d["dynCall_"+a.replace(/f/g,"d")],void 0===c&&V("No dynCall invoker for signature: "+a));for(var e=[],f=1;f<a.length;++f)e.push("a"+f);f="return function "+("dynCall_"+a+"_"+b)+"("+e.join(", ")+") {\n";f+="    return dynCall(rawFunction"+(e.length?", ":"")+e.join(", ")+");\n";c=(new Function("dynCall","rawFunction",
+f+"};\n"))(c,b)}"function"!==typeof c&&V("unknown function pointer with signature "+a+": "+b);return c}var ib=void 0;function jb(a,b){function c(a){f[a]||S[a]||(Ma[a]?Ma[a].forEach(c):(e.push(a),f[a]=!0))}var e=[],f={};b.forEach(c);throw new ib(a+": "+e.map(bb).join([", "]));}
+function kb(a,b,c){switch(b){case 0:return c?function(a){return E[a]}:function(a){return D[a]};case 1:return c?function(a){return F[a>>1]}:function(a){return G[a>>1]};case 2:return c?function(a){return H[a>>2]}:function(a){return I[a>>2]};default:throw new TypeError("Unknown integer type: "+a);}}function lb(){return E.length}Qa=d.InternalError=Pa("InternalError");for(var mb=Array(256),nb=0;256>nb;++nb)mb[nb]=String.fromCharCode(nb);Ta=mb;Ua=d.BindingError=Pa("BindingError");
+d.count_emval_handles=function(){for(var a=0,b=5;b<W.length;++b)void 0!==W[b]&&++a;return a};d.get_first_emval=function(){for(var a=5;a<W.length;++a)if(void 0!==W[a])return W[a];return null};ib=d.UnboundTypeError=Pa("UnboundTypeError");
+var Fa={j:function(a){return ob(a)},g:function(a){"uncaught_exception"in pb?pb.ga++:pb.ga=1;throw a;},q:function(){return Ia.apply(null,arguments)},r:function(){return Ja.apply(null,arguments)},p:function(){return Ka.apply(null,arguments)},o:function(a){var b=P[a];delete P[a];var c=b.oa,e=b.pa,f=b.fa,g=f.map(function(a){return a.ma}).concat(f.map(function(a){return a.ra}));Ra([a],g,function(a){var g={};f.forEach(function(b,c){var e=a[c],l=b.ka,p=b.la,h=a[c+f.length],k=b.qa,ea=b.sa;g[b.ia]={read:function(a){return e.fromWireType(l(p,
+a))},write:function(a,b){var c=[];k(ea,a,h.toWireType(c,b));La(c)}}});return[{name:b.name,fromWireType:function(a){var b={},c;for(c in g)b[c]=g[c].read(a);e(a);return b},toWireType:function(a,b){for(var f in g)if(!(f in b))throw new TypeError("Missing field");var h=c();for(f in g)g[f].write(h,b[f]);null!==a&&a.push(e,h);return h},argPackAdvance:8,readValueFromPointer:Q,aa:e}]})},n:function(a,b,c,e,f){var g=Sa(c);b=U(b);T(a,{name:b,fromWireType:function(a){return!!a},toWireType:function(a,b){return b?
+e:f},argPackAdvance:8,readValueFromPointer:function(a){if(1===c)var e=E;else if(2===c)e=F;else if(4===c)e=H;else throw new TypeError("Unknown boolean type size: "+b);return this.fromWireType(e[a>>g])},aa:null})},m:function(a,b){b=U(b);T(a,{name:b,fromWireType:function(a){var b=W[a].value;Wa(a);return b},toWireType:function(a,b){return Ya(b)},argPackAdvance:8,readValueFromPointer:Q,aa:null})},l:function(a,b,c,e){function f(){}c=Sa(c);b=U(b);f.values={};T(a,{name:b,constructor:f,fromWireType:function(a){return this.constructor.values[a]},
+toWireType:function(a,b){return b.value},argPackAdvance:8,readValueFromPointer:ab(b,c,e),aa:null});$a(b,f)},k:function(a,b,c){var e=db(a,"enum");b=U(b);a=e.constructor;e=Object.create(e.constructor.prototype,{value:{value:c},constructor:{value:Oa(e.name+"_"+b,function(){})}});a.values[c]=e;a[b]=e},i:function(a,b,c){c=Sa(c);b=U(b);T(a,{name:b,fromWireType:function(a){return a},toWireType:function(a,b){if("number"!==typeof b&&"boolean"!==typeof b)throw new TypeError('Cannot convert "'+eb(b)+'" to '+
+this.name);return b},argPackAdvance:8,readValueFromPointer:fb(b,c),aa:null})},e:function(a,b,c,e,f,g){var k=hb(b,c);a=U(a);f=Y(e,f);$a(a,function(){jb("Cannot call "+a+" due to unbound types",k)},b-1);Ra([],k,function(c){var e=[c[0],null].concat(c.slice(1)),l=c=a,k=f,h=e.length;2>h&&V("argTypes array size mismatch! Must at least get return value and 'this' types!");for(var sa=null!==e[1]&&!1,da=!1,m=1;m<e.length;++m)if(null!==e[m]&&void 0===e[m].aa){da=!0;break}var ea="void"!==e[0].name,J="",L="";
+for(m=0;m<h-2;++m)J+=(0!==m?", ":"")+"arg"+m,L+=(0!==m?", ":"")+"arg"+m+"Wired";l="return function "+Na(l)+"("+J+") {\nif (arguments.length !== "+(h-2)+") {\nthrowBindingError('function "+l+" called with ' + arguments.length + ' arguments, expected "+(h-2)+" args!');\n}\n";da&&(l+="var destructors = [];\n");var Xa=da?"destructors":"null";J="throwBindingError invoker fn runDestructors retType classParam".split(" ");k=[V,k,g,La,e[0],e[1]];sa&&(l+="var thisWired = classParam.toWireType("+Xa+", this);\n");
+for(m=0;m<h-2;++m)l+="var arg"+m+"Wired = argType"+m+".toWireType("+Xa+", arg"+m+"); // "+e[m+2].name+"\n",J.push("argType"+m),k.push(e[m+2]);sa&&(L="thisWired"+(0<L.length?", ":"")+L);l+=(ea?"var rv = ":"")+"invoker(fn"+(0<L.length?", ":"")+L+");\n";if(da)l+="runDestructors(destructors);\n";else for(m=sa?1:2;m<e.length;++m)h=1===m?"thisWired":"arg"+(m-2)+"Wired",null!==e[m].aa&&(l+=h+"_dtor("+h+"); // "+e[m].name+"\n",J.push(h+"_dtor"),k.push(e[m].aa));ea&&(l+="var ret = retType.fromWireType(rv);\nreturn ret;\n");
+J.push(l+"}\n");e=gb(J).apply(null,k);m=b-1;if(!d.hasOwnProperty(c))throw new Qa("Replacing nonexistant public symbol");void 0!==d[c].ba&&void 0!==m?d[c].ba[m]=e:(d[c]=e,d[c].ha=m);return[]})},c:function(a,b,c,e,f){function g(a){return a}b=U(b);-1===f&&(f=4294967295);var k=Sa(c);if(0===e){var h=32-8*c;g=function(a){return a<<h>>>h}}var p=-1!=b.indexOf("unsigned");T(a,{name:b,fromWireType:g,toWireType:function(a,c){if("number"!==typeof c&&"boolean"!==typeof c)throw new TypeError('Cannot convert "'+
+eb(c)+'" to '+this.name);if(c<e||c>f)throw new TypeError('Passing a number "'+eb(c)+'" from JS side to C/C++ side to an argument of type "'+b+'", which is outside the valid range ['+e+", "+f+"]!");return p?c>>>0:c|0},argPackAdvance:8,readValueFromPointer:kb(b,k,0!==e),aa:null})},b:function(a,b,c){function e(a){a>>=2;var b=I;return new f(b.buffer,b[a+1],b[a])}var f=[Int8Array,Uint8Array,Int16Array,Uint16Array,Int32Array,Uint32Array,Float32Array,Float64Array][b];c=U(c);T(a,{name:c,fromWireType:e,argPackAdvance:8,
+readValueFromPointer:e},{na:!0})},h:function(a,b){b=U(b);var c="std::string"===b;T(a,{name:b,fromWireType:function(a){var b=I[a>>2];if(c){var e=D[a+4+b],k=0;0!=e&&(k=e,D[a+4+b]=0);var h=a+4;for(e=0;e<=b;++e){var p=a+4+e;if(0==D[p]){h=h?na(D,h,void 0):"";if(void 0===l)var l=h;else l+=String.fromCharCode(0),l+=h;h=p+1}}0!=k&&(D[a+4+b]=k)}else{l=Array(b);for(e=0;e<b;++e)l[e]=String.fromCharCode(D[a+4+e]);l=l.join("")}X(a);return l},toWireType:function(a,b){b instanceof ArrayBuffer&&(b=new Uint8Array(b));
+var e="string"===typeof b;e||b instanceof Uint8Array||b instanceof Uint8ClampedArray||b instanceof Int8Array||V("Cannot pass non-string to std::string");var f=(c&&e?function(){for(var a=0,c=0;c<b.length;++c){var e=b.charCodeAt(c);55296<=e&&57343>=e&&(e=65536+((e&1023)<<10)|b.charCodeAt(++c)&1023);127>=e?++a:a=2047>=e?a+2:65535>=e?a+3:a+4}return a}:function(){return b.length})(),h=ob(4+f+1);I[h>>2]=f;if(c&&e)oa(b,h+4,f+1);else if(e)for(e=0;e<f;++e){var p=b.charCodeAt(e);255<p&&(X(h),V("String has UTF-16 code units that do not fit in 8 bits"));
+D[h+4+e]=p}else for(e=0;e<f;++e)D[h+4+e]=b[e];null!==a&&a.push(X,h);return h},argPackAdvance:8,readValueFromPointer:Q,aa:function(a){X(a)}})},C:function(a,b,c){c=U(c);if(2===b){var e=function(){return G};var f=1}else 4===b&&(e=function(){return I},f=2);T(a,{name:c,fromWireType:function(a){for(var b=e(),c=I[a>>2],g=Array(c),l=a+4>>f,w=0;w<c;++w)g[w]=String.fromCharCode(b[l+w]);X(a);return g.join("")},toWireType:function(a,c){var g=c.length,k=ob(4+g*b),l=e();I[k>>2]=g;for(var w=k+4>>f,B=0;B<g;++B)l[w+
+B]=c.charCodeAt(B);null!==a&&a.push(X,k);return k},argPackAdvance:8,readValueFromPointer:Q,aa:function(a){X(a)}})},B:function(a,b,c,e,f,g){P[a]={name:U(b),oa:Y(c,e),pa:Y(f,g),fa:[]}},d:function(a,b,c,e,f,g,k,h,p,l){P[a].fa.push({ia:U(b),ma:c,ka:Y(e,f),la:g,ra:k,qa:Y(h,p),sa:l})},A:function(a,b){b=U(b);T(a,{va:!0,name:b,argPackAdvance:0,fromWireType:function(){},toWireType:function(){}})},z:Wa,y:function(a){4<a&&(W[a].ea+=1)},x:function(a,b){a=db(a,"_emval_take_value");a=a.readValueFromPointer(b);
+return Ya(a)},__memory_base:1024,__table_base:0,f:function(){y()},w:lb,v:function(a,b,c){D.set(D.subarray(b,b+c),a)},u:function(a){if(2147418112<a)return!1;for(var b=Math.max(lb(),16777216);b<a;)536870912>=b?b=pa(2*b):b=Math.min(pa((3*b+2147483648)/4),2147418112);a:{try{C.grow(b-buffer.byteLength+65535>>16);ta(C.buffer);var c=1;break a}catch(e){}c=void 0}return c?!0:!1},t:function(a){return Math.log(a)/Math.LN10},a:y,memory:C,s:function(){},table:ka},qb=d.asm({},Fa,buffer);d.asm=qb;
+var pb=d.__ZSt18uncaught_exceptionv=function(){return d.asm.D.apply(null,arguments)};d.___embind_register_native_and_builtin_types=function(){return d.asm.E.apply(null,arguments)};var cb=d.___getTypeName=function(){return d.asm.F.apply(null,arguments)},X=d._free=function(){return d.asm.G.apply(null,arguments)},ob=d._malloc=function(){return d.asm.H.apply(null,arguments)},Ga=d.globalCtors=function(){return d.asm.$.apply(null,arguments)};d.dynCall_diiii=function(){return d.asm.I.apply(null,arguments)};
+d.dynCall_fii=function(){return d.asm.J.apply(null,arguments)};d.dynCall_i=function(){return d.asm.K.apply(null,arguments)};d.dynCall_ii=function(){return d.asm.L.apply(null,arguments)};d.dynCall_iidiiii=function(){return d.asm.M.apply(null,arguments)};d.dynCall_iii=function(){return d.asm.N.apply(null,arguments)};d.dynCall_iiii=function(){return d.asm.O.apply(null,arguments)};d.dynCall_iiiiii=function(){return d.asm.P.apply(null,arguments)};
+d.dynCall_iiiiiii=function(){return d.asm.Q.apply(null,arguments)};d.dynCall_jiji=function(){return d.asm.R.apply(null,arguments)};d.dynCall_v=function(){return d.asm.S.apply(null,arguments)};d.dynCall_vi=function(){return d.asm.T.apply(null,arguments)};d.dynCall_vii=function(){return d.asm.U.apply(null,arguments)};d.dynCall_viif=function(){return d.asm.V.apply(null,arguments)};d.dynCall_viii=function(){return d.asm.W.apply(null,arguments)};d.dynCall_viiii=function(){return d.asm.X.apply(null,arguments)};
+d.dynCall_viiiii=function(){return d.asm.Y.apply(null,arguments)};d.dynCall_viiiiii=function(){return d.asm.Z.apply(null,arguments)};d.dynCall_viiiiiiiii=function(){return d.asm._.apply(null,arguments)};d.asm=qb;var Z;d.then=function(a){if(Z)a(d);else{var b=d.onRuntimeInitialized;d.onRuntimeInitialized=function(){b&&b();a(d)}}return d};N=function rb(){Z||sb();Z||(N=rb)};
+function sb(){function a(){if(!Z&&(Z=!0,!la)){K(wa);K(xa);if(d.onRuntimeInitialized)d.onRuntimeInitialized();if(d.postRun)for("function"==typeof d.postRun&&(d.postRun=[d.postRun]);d.postRun.length;){var a=d.postRun.shift();ya.unshift(a)}K(ya)}}if(!(0<M)){if(d.preRun)for("function"==typeof d.preRun&&(d.preRun=[d.preRun]);d.preRun.length;)za();K(va);0<M||(d.setStatus?(d.setStatus("Running..."),setTimeout(function(){setTimeout(function(){d.setStatus("")},1);a()},1)):a())}}d.run=sb;
+if(d.preInit)for("function"==typeof d.preInit&&(d.preInit=[d.preInit]);0<d.preInit.length;)d.preInit.pop()();sb();
+
+
+  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;