1.9.1

optipng build improvements

.nvmrc

@@ -1 +1 @@
-10.15.2
+10.16.2

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/optipng/build.sh

@@ -4,84 +4,40 @@ set -e
 
 export OPTIMIZE="-Os"
 export PREFIX="/src/build"
-export CFLAGS="${OPTIMIZE} -I${PREFIX}/include/"
-export CPPFLAGS="${OPTIMIZE} -I${PREFIX}/include/"
-export LDFLAGS="${OPTIMIZE} -L${PREFIX}/lib/"
-
-apt-get update
-apt-get install -qqy autoconf libtool
-
-echo "============================================="
-echo "Compiling zlib"
-echo "============================================="
-test -n "$SKIP_ZLIB" || (
-  cd node_modules/zlib
-  emconfigure ./configure --prefix=${PREFIX}/
-  emmake make
-  emmake make install
-)
-echo "============================================="
-echo "Compiling zlib done"
-echo "============================================="
-
-echo "============================================="
-echo "Compiling libpng"
-echo "============================================="
-test -n "$SKIP_LIBPNG" || (
-  cd node_modules/libpng
-  autoreconf -i
-  emconfigure ./configure --with-zlib-prefix=${PREFIX}/ --prefix=${PREFIX}/
-  emmake make
-  emmake make install
-)
-echo "============================================="
-echo "Compiling libpng done"
-echo "============================================="
 
 echo "============================================="
 echo "Compiling optipng"
 echo "============================================="
 (
-  emcc \
+  cd node_modules/optipng
-    ${OPTIMIZE} \
+  CFLAGS="${OPTIMIZE} -Isrc/zlib" emconfigure ./configure --prefix=${PREFIX}
-    -Wno-implicit-function-declaration \
+  emmake make
-    -I ${PREFIX}/include \
+  emmake make install
-    -I node_modules/optipng/src/opngreduc \
+  mkdir -p ${PREFIX}/lib
-    -I node_modules/optipng/src/pngxtern \
+  mv ${PREFIX}/bin/optipng ${PREFIX}/lib/liboptipng.so
-    -I node_modules/optipng/src/cexcept \
-    -I node_modules/optipng/src/gifread \
-    -I node_modules/optipng/src/pnmio \
-    -I node_modules/optipng/src/minitiff \
-    --std=c99 -c \
-    node_modules/optipng/src/opngreduc/*.c \
-    node_modules/optipng/src/pngxtern/*.c \
-    node_modules/optipng/src/gifread/*.c \
-    node_modules/optipng/src/minitiff/*.c \
-    node_modules/optipng/src/pnmio/*.c \
-    node_modules/optipng/src/optipng/*.c
-
-  emcc \
-    --bind \
-    ${OPTIMIZE} \
-    -s ALLOW_MEMORY_GROWTH=1 -s MODULARIZE=1 -s 'EXPORT_NAME="optipng"' \
-    -I ${PREFIX}/include \
-    -I node_modules/optipng/src/opngreduc \
-    -I node_modules/optipng/src/pngxtern \
-    -I node_modules/optipng/src/cexcept \
-    -I node_modules/optipng/src/gifread \
-    -I node_modules/optipng/src/pnmio \
-    -I node_modules/optipng/src/minitiff \
-    -o "optipng.js" \
-    --std=c++11 \
-    optipng.cpp \
-    *.o \
-    ${PREFIX}/lib/libz.so ${PREFIX}/lib/libpng.a
 )
 echo "============================================="
 echo "Compiling optipng done"
 echo "============================================="
 
+echo "============================================="
+echo "Compiling optipng wrapper"
+echo "============================================="
+(
+  emcc \
+    --bind \
+    ${OPTIMIZE} \
+    -s ALLOW_MEMORY_GROWTH=1 -s MODULARIZE=1 -s 'EXPORT_NAME="optipng"' \
+    -o "optipng.js" \
+    --std=c++11 \
+    optipng.cpp \
+    ${PREFIX}/lib/liboptipng.so
+)
+echo "============================================="
+echo "Compiling optipng wrapper done"
+echo "============================================="
+
 echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
 echo "Did you update your docker image?"
-echo "Run \`docker pull trzeci/emscripten\`"
+echo "Run \`docker pull trzeci/emscripten-upstream\`"
 echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"

codecs/optipng/package.json

@@ -1,9 +1,9 @@
 {
   "name": "optipng",
   "scripts": {
-    "install": "tar-dependency install && napa",
+    "install": "tar-dependency install",
     "build": "npm run build:wasm",
-    "build:wasm": "docker run --rm -v $(pwd):/src -e SKIP_ZLIB=\"${SKIP_ZLIB}\" -e SKIP_LIBPNG=\"${SKIP_LIBPNG}\" trzeci/emscripten ./build.sh"
+    "build:wasm": "docker run --rm -v $(pwd):/src trzeci/emscripten-upstream ./build.sh"
   },
   "tarDependencies": {
     "node_modules/optipng": {
@@ -11,12 +11,7 @@
       "strip": 1
     }
   },
-  "napa": {
-    "libpng": "emscripten-ports/libpng",
-    "zlib": "emscripten-ports/zlib"
-  },
   "dependencies": {
-    "napa": "3.0.0",
     "tar-dependency": "0.0.3"
   }
 }

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/Dockerfile

@@ -1,17 +1,8 @@
-FROM ubuntu
-RUN apt-get update && \
-  apt-get install -qqy git build-essential cmake python2.7
-RUN git clone --recursive https://github.com/WebAssembly/wabt /usr/src/wabt
-RUN mkdir -p /usr/src/wabt/build
-WORKDIR /usr/src/wabt/build
-RUN cmake .. -DCMAKE_INSTALL_PREFIX=/opt/wabt && \
-  make && \
-  make install
-
 FROM rust
-RUN rustup install nightly && \
+RUN rustup target add wasm32-unknown-unknown
-  rustup target add --toolchain nightly wasm32-unknown-unknown
 
-COPY --from=0 /opt/wabt /opt/wabt
+RUN mkdir /opt/wabt && \
-ENV PATH="/opt/wabt/bin:${PATH}"
+ curl -L https://github.com/WebAssembly/wabt/releases/download/1.0.11/wabt-1.0.11-linux.tar.gz  | tar -xzf - -C /opt/wabt --strip 1
+
+ENV PATH="/opt/wabt:${PATH}"
 WORKDIR /src

codecs/rotate/build.sh

@@ -6,8 +6,7 @@ echo "============================================="
 echo "Compiling wasm"
 echo "============================================="
 (
-  rustup run nightly \
+  cargo build \
-    cargo build \
     --target wasm32-unknown-unknown \
     --release
   cp target/wasm32-unknown-unknown/release/rotate.wasm .

config/size-report.js

@@ -1,203 +0,0 @@
-const path = require('path');
-const { URL } = require('url');
-
-const gzipSize = require('gzip-size');
-const fetch = require('node-fetch');
-const prettyBytes = require('pretty-bytes');
-const escapeRE = require('escape-string-regexp');
-const readdirp = require('readdirp');
-const chalk = new require('chalk').constructor({ level: 4 });
-
-function fetchTravis(path, options = {}) {
-  const url = new URL(path, 'https://api.travis-ci.org');
-  url.search = new URLSearchParams(options);
-
-  return fetch(url, {
-    headers: { 'Travis-API-Version': '3' },
-  });
-}
-
-function fetchTravisBuildInfo(user, repo, branch) {
-  return fetchTravis(`/repo/${encodeURIComponent(`${user}/${repo}`)}/builds`, {
-    'branch.name': branch,
-    state: 'passed',
-    limit: 1,
-    event_type: 'push',
-  }).then(r => r.json());
-}
-
-function fetchTravisText(path) {
-  return fetchTravis(path).then(r => r.text());
-}
-
-/**
- * Recursively-read a directory and turn it into an array of { name, size, gzipSize }
- */
-async function dirToInfoArray(startPath) {
-  const results = await new Promise((resolve, reject) => {
-    readdirp({ root: startPath }, (err, results) => {
-      if (err) reject(err); else resolve(results);
-    });
-  });
-
-  return Promise.all(
-    results.files.map(async (entry) => ({
-      name: entry.path,
-      gzipSize: await gzipSize.file(entry.fullPath),
-      size: entry.stat.size,
-    })),
-  );
-}
-
-/**
- * Try to treat two entries with different file name hashes as the same file.
- */
-function findHashedMatch(name, buildInfo) {
-  const nameParts = /^(.+\.)[a-f0-9]+(\..+)$/.exec(name);
-  if (!nameParts) return;
-
-  const matchRe = new RegExp(`^${escapeRE(nameParts[1])}[a-f0-9]+${escapeRE(nameParts[2])}$`);
-  const matchingEntry = buildInfo.find(entry => matchRe.test(entry.name));
-  return matchingEntry;
-}
-
-const buildSizePrefix = '=== BUILD SIZES: ';
-const buildSizePrefixRe = new RegExp(`^${escapeRE(buildSizePrefix)}(.+)$`, 'm');
-
-async function getPreviousBuildInfo() {
-  const buildData = await fetchTravisBuildInfo('GoogleChromeLabs', 'squoosh', 'master');
-  const jobUrl = buildData.builds[0].jobs[0]['@href'];
-  const log = await fetchTravisText(jobUrl + '/log.txt');
-  const reResult = buildSizePrefixRe.exec(log);
-
-  if (!reResult) return;
-  return JSON.parse(reResult[1]);
-}
-
-/**
- * Generate an array that represents the difference between builds.
- * Returns an array of { beforeName, afterName, beforeSize, afterSize }.
- * Sizes are gzipped size.
- * Before/after properties are missing if resource isn't in the previous/new build.
- */
-function getChanges(previousBuildInfo, buildInfo) {
-  const buildChanges = [];
-  const alsoInPreviousBuild = new Set();
-
-  for (const oldEntry of previousBuildInfo) {
-    const newEntry = buildInfo.find(entry => entry.name === oldEntry.name) ||
-      findHashedMatch(oldEntry.name, buildInfo);
-
-    // Entry is in previous build, but not the new build.
-    if (!newEntry) {
-      buildChanges.push({
-        beforeName: oldEntry.name,
-        beforeSize: oldEntry.gzipSize,
-      });
-      continue;
-    }
-
-    // Mark this entry so we know we've dealt with it.
-    alsoInPreviousBuild.add(newEntry);
-
-    // If they're the same, just ignore.
-    // Using size rather than gzip size. I've seen different platforms produce different zipped
-    // sizes.
-    if (
-      oldEntry.size === newEntry.size &&
-      oldEntry.name === newEntry.name
-    ) continue;
-
-    // Entry is in both builds (maybe renamed).
-    buildChanges.push({
-      beforeName: oldEntry.name,
-      afterName: newEntry.name,
-      beforeSize: oldEntry.gzipSize,
-      afterSize: newEntry.gzipSize,
-    });
-  }
-
-  // Look for entries that are only in the new build.
-  for (const newEntry of buildInfo) {
-    if (alsoInPreviousBuild.has(newEntry)) continue;
-
-    buildChanges.push({
-      afterName: newEntry.name,
-      afterSize: newEntry.gzipSize,
-    });
-  }
-
-  return buildChanges;
-}
-
-async function main() {
-  // Output the current build sizes for later retrieval.
-  const buildInfo = await dirToInfoArray(__dirname + '/../build');
-  console.log(buildSizePrefix + JSON.stringify(buildInfo));
-  console.log('\nBuild change report:');
-
-  let previousBuildInfo;
-
-  try {
-    previousBuildInfo = await getPreviousBuildInfo();
-  } catch (err) {
-    console.log(`  Couldn't parse previous build info`);
-    return;
-  }
-
-  if (!previousBuildInfo) {
-    console.log(`  Couldn't find previous build info`);
-    return;
-  }
-
-  const buildChanges = getChanges(previousBuildInfo, buildInfo);
-
-  if (buildChanges.length === 0) {
-    console.log('  No changes');
-    return;
-  }
-
-  // One letter references, so it's easier to get the spacing right.
-  const y = chalk.yellow;
-  const g = chalk.green;
-  const r = chalk.red;
-
-  for (const change of buildChanges) {
-    // New file.
-    if (!change.beforeSize) {
-      console.log(`  ${g('ADDED')}   ${change.afterName} - ${prettyBytes(change.afterSize)}`);
-      continue;
-    }
-
-    // Removed file.
-    if (!change.afterSize) {
-      console.log(`  ${r('REMOVED')} ${change.beforeName} - was ${prettyBytes(change.beforeSize)}`);
-      continue;
-    }
-
-    // Changed file.
-    let size;
-
-    if (change.beforeSize === change.afterSize) {
-      // Just renamed.
-      size = `${prettyBytes(change.afterSize)} -> no change`;
-    } else {
-      const color = change.afterSize > change.beforeSize ? r : g;
-      const sizeDiff = prettyBytes(change.afterSize - change.beforeSize, { signed: true });
-      const relativeDiff = Math.round((change.afterSize / change.beforeSize) * 1000) / 1000;
-
-      size = `${prettyBytes(change.beforeSize)} -> ${prettyBytes(change.afterSize)}` +
-        ' (' +
-        color(`${sizeDiff}, ${relativeDiff}x`) +
-        ')';
-    }
-
-    console.log(`  ${y('CHANGED')} ${change.afterName} - ${size}`);
-
-    if (change.beforeName !== change.afterName) {
-      console.log(`    Renamed from: ${change.beforeName}`);
-    }
-  }
-}
-
-main();

package.json

@@ -1,14 +1,14 @@
 {
   "private": true,
   "name": "squoosh",
-  "version": "1.3.4",
+  "version": "1.9.1",
   "license": "apache-2.0",
   "scripts": {
     "start": "webpack-dev-server --host 0.0.0.0 --hot",
     "build": "webpack -p",
-    "lint": "tslint -c tslint.json  -p tsconfig.json -t verbose 'src/**/*.{ts,tsx,js,jsx}'",
+    "lint": "tslint -c tslint.json  -p tsconfig.json -t verbose",
     "lintfix": "tslint -c tslint.json -p tsconfig.json -t verbose --fix 'src/**/*.{ts,tsx,js,jsx}'",
-    "sizereport": "node config/size-report.js"
+    "sizereport": "sizereport --config"
   },
   "husky": {
     "hooks": {
@@ -16,60 +16,61 @@
     }
   },
   "devDependencies": {
-    "@types/node": "10.12.29",
+    "@types/node": "10.14.15",
     "@types/pretty-bytes": "5.1.0",
-    "@types/webassembly-js-api": "0.0.2",
+    "@types/webassembly-js-api": "0.0.3",
-    "@webcomponents/custom-elements": "1.2.1",
+    "@webcomponents/custom-elements": "1.2.4",
-    "@webpack-cli/serve": "0.1.3",
+    "@webpack-cli/serve": "0.1.8",
     "assets-webpack-plugin": "3.9.10",
-    "chokidar": "2.1.2",
     "chalk": "2.4.2",
+    "chokidar": "3.0.2",
     "classnames": "2.2.6",
     "clean-webpack-plugin": "1.0.1",
     "comlink": "3.1.1",
-    "copy-webpack-plugin": "5.0.0",
+    "copy-webpack-plugin": "5.0.4",
-    "critters-webpack-plugin": "2.3.0",
+    "critters-webpack-plugin": "2.4.0",
     "css-loader": "1.0.1",
-    "ejs": "2.6.1",
+    "ejs": "2.6.2",
-    "escape-string-regexp": "1.0.5",
+    "escape-string-regexp": "2.0.0",
     "exports-loader": "0.7.0",
     "file-drop-element": "0.2.0",
-    "file-loader": "3.0.1",
+    "file-loader": "4.2.0",
-    "gzip-size": "5.0.0",
+    "gzip-size": "5.1.1",
     "html-webpack-plugin": "3.2.0",
-    "husky": "1.3.1",
+    "husky": "3.0.4",
-    "idb-keyval": "3.1.0",
+    "idb-keyval": "3.2.0",
     "linkstate": "1.1.1",
     "loader-utils": "1.2.3",
-    "mini-css-extract-plugin": "0.5.0",
+    "mini-css-extract-plugin": "0.8.0",
     "minimatch": "3.0.4",
-    "node-fetch": "2.3.0",
+    "node-fetch": "2.6.0",
-    "node-sass": "4.11.0",
+    "node-sass": "4.12.0",
     "optimize-css-assets-webpack-plugin": "5.0.1",
     "pointer-tracker": "2.0.3",
     "preact": "8.4.2",
     "prerender-loader": "1.3.0",
-    "pretty-bytes": "5.1.0",
+    "pretty-bytes": "5.3.0",
     "progress-bar-webpack-plugin": "1.12.1",
-    "raw-loader": "1.0.0",
+    "raw-loader": "3.1.0",
-    "readdirp": "2.2.1",
+    "readdirp": "3.1.2",
-    "sass-loader": "7.1.0",
+    "sass-loader": "7.3.1",
-    "script-ext-html-webpack-plugin": "2.1.3",
+    "script-ext-html-webpack-plugin": "2.1.4",
     "source-map-loader": "0.2.4",
-    "style-loader": "0.23.1",
+    "style-loader": "1.0.0",
-    "terser-webpack-plugin": "1.2.3",
+    "terser-webpack-plugin": "1.4.1",
-    "ts-loader": "5.3.3",
+    "travis-size-report": "1.1.0",
-    "tslint": "5.13.1",
+    "ts-loader": "6.0.3",
+    "tslint": "5.19.0",
     "tslint-config-airbnb": "5.11.1",
-    "tslint-config-semistandard": "7.0.0",
+    "tslint-config-semistandard": "8.0.1",
-    "tslint-react": "3.6.0",
+    "tslint-react": "4.0.0",
-    "typed-css-modules": "0.4.1",
+    "typed-css-modules": "0.4.2",
-    "typescript": "3.3.3333",
+    "typescript": "3.5.3",
-    "url-loader": "1.1.2",
+    "url-loader": "2.1.0",
     "webpack": "4.28.0",
-    "webpack-bundle-analyzer": "3.1.0",
+    "webpack-bundle-analyzer": "3.4.1",
-    "webpack-cli": "3.2.3",
+    "webpack-cli": "3.3.4",
-    "webpack-dev-server": "3.2.1",
+    "webpack-dev-server": "3.8.0",
     "worker-plugin": "3.1.0"
   }
 }

sizereport.config.js

@@ -0,0 +1,14 @@
+const escapeRE = require("escape-string-regexp");
+
+module.exports = {
+  repo: "GoogleChromeLabs/squoosh",
+  path: "build/**/!(*.map)",
+  branch: "master",
+  findRenamed(path, newPaths) {
+    const nameParts = /^(.+\.)[a-f0-9]+(\..+)$/.exec(path);
+    if (!nameParts) return;
+
+    const matchRe = new RegExp(`^${escapeRE(nameParts[1])}[a-f0-9]+${escapeRE(nameParts[2])}$`);
+    return newPaths.find(newPath => matchRe.test(newPath));
+  }
+};

src/codecs/hqx/processor-meta.ts

@@ -0,0 +1,3 @@
+export interface HqxOptions {
+  factor: 2 | 3 | 4;
+}

src/codecs/hqx/processor.ts

@@ -0,0 +1,20 @@
+import { resize } from '../../../codecs/hqx/pkg';
+import { HqxOptions } from './processor-meta';
+
+export async function hqx(
+  data: ImageData,
+  opts: HqxOptions,
+): Promise<ImageData> {
+  const input = data;
+  const result = resize(
+    new Uint32Array(input.data.buffer),
+    input.width,
+    input.height,
+    opts.factor,
+  );
+  return new ImageData(
+    new Uint8ClampedArray(result.buffer),
+    data.width * opts.factor,
+    data.height * opts.factor,
+  );
+}

src/codecs/imagequant/processor.ts

@@ -1,12 +1,12 @@
 import imagequant, { QuantizerModule } from '../../../codecs/imagequant/imagequant';
 import wasmUrl from '../../../codecs/imagequant/imagequant.wasm';
 import { QuantizeOptions } from './processor-meta';
-import { initWasmModule } from '../util';
+import { initEmscriptenModule } from '../util';
 
 let emscriptenModule: Promise<QuantizerModule>;
 
 export async function process(data: ImageData, opts: QuantizeOptions): Promise<ImageData> {
-  if (!emscriptenModule) emscriptenModule = initWasmModule(imagequant, wasmUrl);
+  if (!emscriptenModule) emscriptenModule = initEmscriptenModule(imagequant, wasmUrl);
 
   const module = await emscriptenModule;
 

src/codecs/mozjpeg/encoder.ts

@@ -1,12 +1,12 @@
 import mozjpeg_enc, { MozJPEGModule } from '../../../codecs/mozjpeg_enc/mozjpeg_enc';
 import wasmUrl from '../../../codecs/mozjpeg_enc/mozjpeg_enc.wasm';
 import { EncodeOptions } from './encoder-meta';
-import { initWasmModule } from '../util';
+import { initEmscriptenModule } from '../util';
 
 let emscriptenModule: Promise<MozJPEGModule>;
 
 export async function encode(data: ImageData, options: EncodeOptions): Promise<ArrayBuffer> {
-  if (!emscriptenModule) emscriptenModule = initWasmModule(mozjpeg_enc, wasmUrl);
+  if (!emscriptenModule) emscriptenModule = initEmscriptenModule(mozjpeg_enc, wasmUrl);
 
   const module = await emscriptenModule;
   const resultView = module.encode(data.data, data.width, data.height, options);

src/codecs/optipng/encoder.ts

@@ -1,12 +1,12 @@
 import optipng, { OptiPngModule } from '../../../codecs/optipng/optipng';
 import wasmUrl from '../../../codecs/optipng/optipng.wasm';
 import { EncodeOptions } from './encoder-meta';
-import { initWasmModule } from '../util';
+import { initEmscriptenModule } from '../util';
 
 let emscriptenModule: Promise<OptiPngModule>;
 
 export async function compress(data: BufferSource, options: EncodeOptions): Promise<ArrayBuffer> {
-  if (!emscriptenModule) emscriptenModule = initWasmModule(optipng, wasmUrl);
+  if (!emscriptenModule) emscriptenModule = initEmscriptenModule(optipng, wasmUrl);
 
   const module = await emscriptenModule;
   const resultView = module.compress(data, options);

src/codecs/processor-worker/index.ts

@@ -1,4 +1,6 @@
 import { expose } from 'comlink';
+import { isHqx } from '../resize/processor-meta';
+import { clamp } from '../util';
 
 async function mozjpegEncode(
   data: ImageData, options: import('../mozjpeg/encoder-meta').EncodeOptions,
@@ -28,6 +30,28 @@ async function rotate(
   return rotate(data, opts);
 }
 
+async function resize(
+  data: ImageData, opts: import('../resize/processor-meta').WorkerResizeOptions,
+): Promise<ImageData> {
+  if (isHqx(opts)) {
+    const { hqx } = await import(
+      /* webpackChunkName: "process-hqx" */
+      '../hqx/processor');
+
+    const widthRatio = opts.width / data.width;
+    const heightRatio = opts.height / data.height;
+    const ratio = Math.max(widthRatio, heightRatio);
+    if (ratio <= 1) return data;
+    const factor = clamp(Math.ceil(ratio), { min: 2, max: 4 }) as 2|3|4;
+    return hqx(data, { factor });
+  }
+  const { resize } = await import(
+    /* webpackChunkName: "process-resize" */
+    '../resize/processor');
+
+  return resize(data, opts);
+}
+
 async function optiPngEncode(
   data: BufferSource, options: import('../optipng/encoder-meta').EncodeOptions,
 ): Promise<ArrayBuffer> {
@@ -53,7 +77,15 @@ async function webpDecode(data: ArrayBuffer): Promise<ImageData> {
   return decode(data);
 }
 
-const exports = { mozjpegEncode, quantize, rotate, optiPngEncode, webpEncode, webpDecode };
+const exports = {
+  mozjpegEncode,
+  quantize,
+  rotate,
+  resize,
+  optiPngEncode,
+  webpEncode,
+  webpDecode,
+};
 export type ProcessorWorkerApi = typeof exports;
 
 expose(exports, self);

src/codecs/processor.ts

@@ -6,8 +6,8 @@ import { EncodeOptions as OptiPNGEncoderOptions } from './optipng/encoder-meta';
 import { EncodeOptions as WebPEncoderOptions } from './webp/encoder-meta';
 import { EncodeOptions as BrowserJPEGOptions } from './browser-jpeg/encoder-meta';
 import { EncodeOptions as BrowserWebpEncodeOptions } from './browser-webp/encoder-meta';
-import { BitmapResizeOptions, VectorResizeOptions } from './resize/processor-meta';
+import { BrowserResizeOptions, VectorResizeOptions } from './resize/processor-meta';
-import { resize, vectorResize } from './resize/processor';
+import { browserResize, vectorResize } from './resize/processor-sync';
 import * as browserBMP from './browser-bmp/encoder';
 import * as browserPNG from './browser-png/encoder';
 import * as browserJPEG from './browser-jpeg/encoder';
@@ -16,6 +16,7 @@ import * as browserGIF from './browser-gif/encoder';
 import * as browserTIFF from './browser-tiff/encoder';
 import * as browserJP2 from './browser-jp2/encoder';
 import * as browserPDF from './browser-pdf/encoder';
+import { bind } from '../lib/initial-util';
 
 type ProcessorWorkerApi = import('./processor-worker').ProcessorWorkerApi;
 
@@ -94,14 +95,7 @@ export default class Processor {
     if (!this._worker) return;
 
     // If the worker is unused for 10 seconds, remove it to save memory.
-    this._workerTimeoutId = self.setTimeout(
+    this._workerTimeoutId = self.setTimeout(this.terminateWorker, workerTimeout);
-      () => {
-        if (!this._worker) return;
-        this._worker.terminate();
-        this._worker = undefined;
-      },
-      workerTimeout,
-    );
   }
 
   /** Abort the current job, if any */
@@ -111,7 +105,11 @@ export default class Processor {
     this._abortRejector(new DOMException('Aborted', 'AbortError'));
     this._abortRejector = undefined;
     this._busy = false;
+    this.terminateWorker();
+  }
 
+  @bind
+  terminateWorker() {
     if (!this._worker) return;
     this._worker.terminate();
     this._worker = undefined;
@@ -130,6 +128,13 @@ export default class Processor {
     return this._workerApi!.rotate(data, opts);
   }
 
+  @Processor._processingJob({ needsWorker: true })
+  workerResize(
+    data: ImageData, opts: import('./resize/processor-meta').WorkerResizeOptions,
+  ): Promise<ImageData> {
+    return this._workerApi!.resize(data, opts);
+  }
+
   @Processor._processingJob({ needsWorker: true })
   mozjpegEncode(
     data: ImageData, opts: MozJPEGEncoderOptions,
@@ -202,9 +207,9 @@ export default class Processor {
 
   // Synchronous jobs
 
-  resize(data: ImageData, opts: BitmapResizeOptions) {
+  resize(data: ImageData, opts: BrowserResizeOptions) {
     this.abortCurrent();
-    return resize(data, opts);
+    return browserResize(data, opts);
   }
 
   vectorResize(data: HTMLImageElement, opts: VectorResizeOptions) {

src/codecs/resize/options.tsx

@@ -1,8 +1,10 @@
 import { h, Component } from 'preact';
 import linkState from 'linkstate';
 import { bind, linkRef } from '../../lib/initial-util';
-import { inputFieldValueAsNumber, inputFieldValue, preventDefault } from '../../lib/util';
+import {
-import { ResizeOptions } from './processor-meta';
+  inputFieldValueAsNumber, inputFieldValue, preventDefault, inputFieldChecked,
+} from '../../lib/util';
+import { ResizeOptions, isWorkerOptions } from './processor-meta';
 import * as style from '../../components/Options/style.scss';
 import Checkbox from '../../components/checkbox';
 import Expander from '../../components/expander';
@@ -10,8 +12,9 @@ import Select from '../../components/select';
 
 interface Props {
   isVector: Boolean;
+  inputWidth: number;
+  inputHeight: number;
   options: ResizeOptions;
-  aspect: number;
   onChange(newOptions: ResizeOptions): void;
 }
 
@@ -19,12 +22,21 @@ interface State {
   maintainAspect: boolean;
 }
 
+const sizePresets = [0.25, 0.3333, 0.5, 1, 2, 3, 4];
+
 export default class ResizerOptions extends Component<Props, State> {
   state: State = {
     maintainAspect: true,
   };
 
-  form?: HTMLFormElement;
+  private form?: HTMLFormElement;
+  private presetWidths: { [idx: number]: number } = {};
+  private presetHeights: { [idx: number]: number } = {};
+
+  constructor(props: Props) {
+    super(props);
+    this.generatePresetValues(props.inputWidth, props.inputHeight);
+  }
 
   private reportOptions() {
     const form = this.form!;
@@ -38,6 +50,8 @@ export default class ResizerOptions extends Component<Props, State> {
       width: inputFieldValueAsNumber(width),
       height: inputFieldValueAsNumber(height),
       method: form.resizeMethod.value,
+      premultiply: inputFieldChecked(form.premultiply, true),
+      linearRGB: inputFieldChecked(form.linearRGB, true),
       // Casting, as the formfield only returns the correct values.
       fitMethod: inputFieldValue(form.fitMethod, options.fitMethod) as ResizeOptions['fitMethod'],
     };
@@ -49,18 +63,31 @@ export default class ResizerOptions extends Component<Props, State> {
     this.reportOptions();
   }
 
+  private getAspect() {
+    return this.props.inputWidth / this.props.inputHeight;
+  }
+
   componentDidUpdate(prevProps: Props, prevState: State) {
     if (!prevState.maintainAspect && this.state.maintainAspect) {
-      this.form!.height.value = Math.round(Number(this.form!.width.value) / this.props.aspect);
+      this.form!.height.value = Math.round(Number(this.form!.width.value) / this.getAspect());
       this.reportOptions();
     }
   }
 
+  componentWillReceiveProps(nextProps: Props) {
+    if (
+      this.props.inputWidth !== nextProps.inputWidth ||
+      this.props.inputHeight !== nextProps.inputHeight
+    ) {
+      this.generatePresetValues(nextProps.inputWidth, nextProps.inputHeight);
+    }
+  }
+
   @bind
   private onWidthInput() {
     if (this.state.maintainAspect) {
       const width = inputFieldValueAsNumber(this.form!.width);
-      this.form!.height.value = Math.round(width / this.props.aspect);
+      this.form!.height.value = Math.round(width / this.getAspect());
     }
 
     this.reportOptions();
@@ -70,12 +97,44 @@ export default class ResizerOptions extends Component<Props, State> {
   private onHeightInput() {
     if (this.state.maintainAspect) {
       const height = inputFieldValueAsNumber(this.form!.height);
-      this.form!.width.value = Math.round(height * this.props.aspect);
+      this.form!.width.value = Math.round(height * this.getAspect());
     }
 
     this.reportOptions();
   }
 
+  private generatePresetValues(width: number, height: number) {
+    for (const preset of sizePresets) {
+      this.presetWidths[preset] = Math.round(width * preset);
+      this.presetHeights[preset] = Math.round(height * preset);
+    }
+  }
+
+  private getPreset(): number | string {
+    const { width, height } = this.props.options;
+
+    for (const preset of sizePresets) {
+      if (
+        width === this.presetWidths[preset] &&
+        height === this.presetHeights[preset]
+      ) return preset;
+    }
+
+    return 'custom';
+  }
+
+  @bind
+  private onPresetChange(event: Event) {
+    const select = event.target as HTMLSelectElement;
+    if (select.value === 'custom') return;
+    const multiplier = Number(select.value);
+    (this.form!.width as HTMLInputElement).value =
+      Math.round(this.props.inputWidth * multiplier) + '';
+    (this.form!.height as HTMLInputElement).value =
+      Math.round(this.props.inputHeight * multiplier) + '';
+    this.reportOptions();
+  }
+
   render({ options, isVector }: Props, { maintainAspect }: State) {
     return (
       <form ref={linkRef(this, 'form')} class={style.optionsSection} onSubmit={preventDefault}>
@@ -87,12 +146,26 @@ export default class ResizerOptions extends Component<Props, State> {
             onChange={this.onChange}
           >
             {isVector && <option value="vector">Vector</option>}
+            <option value="lanczos3">Lanczos3</option>
+            <option value="mitchell">Mitchell</option>
+            <option value="catrom">Catmull-Rom</option>
+            <option value="triangle">Triangle (bilinear)</option>
+            <option value="hqx">hqx (pixel art)</option>
             <option value="browser-pixelated">Browser pixelated</option>
             <option value="browser-low">Browser low quality</option>
             <option value="browser-medium">Browser medium quality</option>
             <option value="browser-high">Browser high quality</option>
           </Select>
         </label>
+        <label class={style.optionTextFirst}>
+          Preset:
+          <Select value={this.getPreset()} onChange={this.onPresetChange}>
+            {sizePresets.map(preset =>
+              <option value={preset}>{preset * 100}%</option>,
+            )}
+            <option value="custom">Custom</option>
+          </Select>
+        </label>
         <label class={style.optionTextFirst}>
           Width:
           <input
@@ -117,6 +190,30 @@ export default class ResizerOptions extends Component<Props, State> {
             onInput={this.onHeightInput}
           />
         </label>
+        <Expander>
+          {isWorkerOptions(options) ?
+            <label class={style.optionInputFirst}>
+              <Checkbox
+                name="premultiply"
+                checked={options.premultiply}
+                onChange={this.onChange}
+              />
+              Premultiply alpha channel
+            </label>
+            : null
+          }
+          {isWorkerOptions(options) ?
+            <label class={style.optionInputFirst}>
+              <Checkbox
+                name="linearRGB"
+                checked={options.linearRGB}
+                onChange={this.onChange}
+              />
+              Linear RGB
+            </label>
+            : null
+          }
+        </Expander>
         <label class={style.optionInputFirst}>
           <Checkbox
             name="maintainAspect"

src/codecs/resize/processor-meta.ts

@@ -1,26 +1,75 @@
-type BitmapResizeMethods = 'browser-pixelated' | 'browser-low' | 'browser-medium' | 'browser-high';
+type BrowserResizeMethods =
+  | 'browser-pixelated'
+  | 'browser-low'
+  | 'browser-medium'
+  | 'browser-high';
+type WorkerResizeMethods =
+  | 'triangle'
+  | 'catrom'
+  | 'mitchell'
+  | 'lanczos3'
+  | 'hqx';
+const workerResizeMethods: WorkerResizeMethods[] = [
+  'triangle',
+  'catrom',
+  'mitchell',
+  'lanczos3',
+  'hqx',
+];
 
-export interface ResizeOptions {
+export type ResizeOptions =
+  | BrowserResizeOptions
+  | WorkerResizeOptions
+  | VectorResizeOptions;
+
+export interface ResizeOptionsCommon {
   width: number;
   height: number;
-  method: 'vector' | BitmapResizeMethods;
   fitMethod: 'stretch' | 'contain';
 }
 
-export interface BitmapResizeOptions extends ResizeOptions {
+export interface BrowserResizeOptions extends ResizeOptionsCommon {
-  method: BitmapResizeMethods;
+  method: BrowserResizeMethods;
 }
 
-export interface VectorResizeOptions extends ResizeOptions {
+export interface WorkerResizeOptions extends ResizeOptionsCommon {
+  method: WorkerResizeMethods;
+  premultiply: boolean;
+  linearRGB: boolean;
+}
+
+export interface VectorResizeOptions extends ResizeOptionsCommon {
   method: 'vector';
 }
 
+/**
+ * Return whether a set of options are worker resize options.
+ *
+ * @param opts
+ */
+export function isWorkerOptions(
+  opts: ResizeOptions,
+): opts is WorkerResizeOptions {
+  return (workerResizeMethods as string[]).includes(opts.method);
+}
+
+/**
+ * Return whether a set of options are from the HQ<n>X set
+ *
+ * @param opts
+ */
+export function isHqx(opts: ResizeOptions): opts is WorkerResizeOptions {
+  return opts.method === 'hqx';
+}
+
 export const defaultOptions: ResizeOptions = {
   // Width and height will always default to the image size.
   // This is set elsewhere.
   width: 1,
   height: 1,
   // This will be set to 'vector' if the input is SVG.
-  method: 'browser-high',
+  method: 'lanczos3',
   fitMethod: 'stretch',
+  premultiply: true,
+  linearRGB: true,
 };

src/codecs/resize/processor-sync.ts

@@ -0,0 +1,35 @@
+import { nativeResize, NativeResizeMethod, drawableToImageData } from '../../lib/util';
+import { BrowserResizeOptions, VectorResizeOptions } from './processor-meta';
+import { getContainOffsets } from './util';
+
+export function browserResize(data: ImageData, opts: BrowserResizeOptions): ImageData {
+  let sx = 0;
+  let sy = 0;
+  let sw = data.width;
+  let sh = data.height;
+
+  if (opts.fitMethod === 'contain') {
+    ({ sx, sy, sw, sh } = getContainOffsets(sw, sh, opts.width, opts.height));
+  }
+
+  return nativeResize(
+    data, sx, sy, sw, sh, opts.width, opts.height,
+    opts.method.slice('browser-'.length) as NativeResizeMethod,
+  );
+}
+
+export function vectorResize(data: HTMLImageElement, opts: VectorResizeOptions): ImageData {
+  let sx = 0;
+  let sy = 0;
+  let sw = data.width;
+  let sh = data.height;
+
+  if (opts.fitMethod === 'contain') {
+    ({ sx, sy, sw, sh } = getContainOffsets(sw, sh, opts.width, opts.height));
+  }
+
+  return drawableToImageData(data, {
+    sx, sy, sw, sh,
+    width: opts.width, height: opts.height,
+  });
+}

src/codecs/resize/processor.ts

@@ -1,49 +1,39 @@
-import { nativeResize, NativeResizeMethod, drawableToImageData } from '../../lib/util';
+import { WorkerResizeOptions } from './processor-meta';
-import { BitmapResizeOptions, VectorResizeOptions } from './processor-meta';
+import { getContainOffsets } from './util';
+import { resize as codecResize } from '../../../codecs/resize/pkg';
 
-function getContainOffsets(sw: number, sh: number, dw: number, dh: number) {
+function crop(data: ImageData, sx: number, sy: number, sw: number, sh: number): ImageData {
-  const currentAspect = sw / sh;
+  const inputPixels = new Uint32Array(data.data.buffer);
-  const endAspect = dw / dh;
 
-  if (endAspect > currentAspect) {
+  // Copy within the same buffer for speed and memory efficiency.
-    const newSh = sw / endAspect;
+  for (let y = 0; y < sh; y += 1) {
-    const newSy = (sh - newSh) / 2;
+    const start = ((y + sy) * data.width) + sx;
-    return { sw, sh: newSh, sx: 0, sy: newSy };
+    inputPixels.copyWithin(y * sw, start, start + sw);
   }
 
-  const newSw = sh * endAspect;
+  return new ImageData(
-  const newSx = (sw - newSw) / 2;
+    new Uint8ClampedArray(inputPixels.buffer.slice(0, sw * sh * 4)),
-  return { sh, sw: newSw, sx: newSx, sy: 0 };
+    sw, sh,
-}
-
-export function resize(data: ImageData, opts: BitmapResizeOptions): ImageData {
-  let sx = 0;
-  let sy = 0;
-  let sw = data.width;
-  let sh = data.height;
-
-  if (opts.fitMethod === 'contain') {
-    ({ sx, sy, sw, sh } = getContainOffsets(sw, sh, opts.width, opts.height));
-  }
-
-  return nativeResize(
-    data, sx, sy, sw, sh, opts.width, opts.height,
-    opts.method.slice('browser-'.length) as NativeResizeMethod,
   );
 }
 
-export function vectorResize(data: HTMLImageElement, opts: VectorResizeOptions): ImageData {
+/** Resize methods by index */
-  let sx = 0;
+const resizeMethods: WorkerResizeOptions['method'][] = [
-  let sy = 0;
+  'triangle', 'catrom', 'mitchell', 'lanczos3',
-  let sw = data.width;
+];
-  let sh = data.height;
+
+export async function resize(data: ImageData, opts: WorkerResizeOptions): Promise<ImageData> {
+  let input = data;
 
   if (opts.fitMethod === 'contain') {
-    ({ sx, sy, sw, sh } = getContainOffsets(sw, sh, opts.width, opts.height));
+    const { sx, sy, sw, sh } = getContainOffsets(data.width, data.height, opts.width, opts.height);
+    input = crop(input, Math.round(sx), Math.round(sy), Math.round(sw), Math.round(sh));
   }
 
-  return drawableToImageData(data, {
+  const result = codecResize(
-    sx, sy, sw, sh,
+    new Uint8Array(input.data.buffer), input.width, input.height, opts.width, opts.height,
-    width: opts.width, height: opts.height,
+    resizeMethods.indexOf(opts.method), opts.premultiply, opts.linearRGB,
-  });
+  );
+
+  return new ImageData(new Uint8ClampedArray(result.buffer), opts.width, opts.height);
 }

src/codecs/resize/util.ts

@@ -0,0 +1,14 @@
+export function getContainOffsets(sw: number, sh: number, dw: number, dh: number) {
+  const currentAspect = sw / sh;
+  const endAspect = dw / dh;
+
+  if (endAspect > currentAspect) {
+    const newSh = sw / endAspect;
+    const newSy = (sh - newSh) / 2;
+    return { sw, sh: newSh, sx: 0, sy: newSy };
+  }
+
+  const newSw = sh * endAspect;
+  const newSx = (sw - newSw) / 2;
+  return { sh, sw: newSw, sx: newSx, sy: 0 };
+}

src/codecs/util.ts

@@ -2,7 +2,7 @@ type ModuleFactory<M extends EmscriptenWasm.Module> = (
   opts: EmscriptenWasm.ModuleOpts,
 ) => M;
 
-export function initWasmModule<T extends EmscriptenWasm.Module>(
+export function initEmscriptenModule<T extends EmscriptenWasm.Module>(
   moduleFactory: ModuleFactory<T>,
   wasmUrl: string,
 ): Promise<T> {
@@ -25,3 +25,12 @@ export function initWasmModule<T extends EmscriptenWasm.Module>(
     });
   });
 }
+
+interface ClampOpts {
+  min?: number;
+  max?: number;
+}
+
+export function clamp(x: number, opts: ClampOpts): number {
+  return Math.min(Math.max(x, opts.min || Number.MIN_VALUE), opts.max || Number.MAX_VALUE);
+}

src/codecs/webp/decoder.ts

@@ -1,11 +1,11 @@
 import webp_dec, { WebPModule } from '../../../codecs/webp_dec/webp_dec';
 import wasmUrl from '../../../codecs/webp_dec/webp_dec.wasm';
-import { initWasmModule } from '../util';
+import { initEmscriptenModule } from '../util';
 
 let emscriptenModule: Promise<WebPModule>;
 
 export async function decode(data: ArrayBuffer): Promise<ImageData> {
-  if (!emscriptenModule) emscriptenModule = initWasmModule(webp_dec, wasmUrl);
+  if (!emscriptenModule) emscriptenModule = initEmscriptenModule(webp_dec, wasmUrl);
 
   const module = await emscriptenModule;
   const rawImage = module.decode(data);

src/codecs/webp/encoder.ts

@@ -1,12 +1,12 @@
 import webp_enc, { WebPModule } from '../../../codecs/webp_enc/webp_enc';
 import wasmUrl from '../../../codecs/webp_enc/webp_enc.wasm';
 import { EncodeOptions } from './encoder-meta';
-import { initWasmModule } from '../util';
+import { initEmscriptenModule } from '../util';
 
 let emscriptenModule: Promise<WebPModule>;
 
 export async function encode(data: ImageData, options: EncodeOptions): Promise<ArrayBuffer> {
-  if (!emscriptenModule) emscriptenModule = initWasmModule(webp_enc, wasmUrl);
+  if (!emscriptenModule) emscriptenModule = initEmscriptenModule(webp_enc, wasmUrl);
 
   const module = await emscriptenModule;
   const resultView = module.encode(data.data, data.width, data.height, options);

src/components/App/index.tsx

@@ -14,9 +14,10 @@ const ROUTE_EDITOR = '/editor';
 const compressPromise = import(
   /* webpackChunkName: "main-app" */
   '../compress');
-const offlinerPromise = import(
+
-  /* webpackChunkName: "offliner" */
+const swBridgePromise = import(
-  '../../lib/offliner');
+  /* webpackChunkName: "sw-bridge" */
+  '../../lib/sw-bridge');
 
 function back() {
   window.history.back();
@@ -25,6 +26,7 @@ function back() {
 interface Props {}
 
 interface State {
+  awaitingShareTarget: boolean;
   file?: File | Fileish;
   isEditorOpen: Boolean;
   Compress?: typeof import('../compress').default;
@@ -32,6 +34,7 @@ interface State {
 
 export default class App extends Component<Props, State> {
   state: State = {
+    awaitingShareTarget: new URL(location.href).searchParams.has('share-target'),
     isEditorOpen: false,
     file: undefined,
     Compress: undefined,
@@ -48,7 +51,15 @@ export default class App extends Component<Props, State> {
       this.showSnack('Failed to load app');
     });
 
-    offlinerPromise.then(({ offliner }) => offliner(this.showSnack));
+    swBridgePromise.then(async ({ offliner, getSharedImage }) => {
+      offliner(this.showSnack);
+      if (!this.state.awaitingShareTarget) return;
+      const file = await getSharedImage();
+      // Remove the ?share-target from the URL
+      history.replaceState('', '', '/');
+      this.openEditor();
+      this.setState({ file, awaitingShareTarget: false });
+    });
 
     // In development, persist application state across hot reloads:
     if (process.env.NODE_ENV === 'development') {
@@ -99,19 +110,25 @@ export default class App extends Component<Props, State> {
   @bind
   private openEditor() {
     if (this.state.isEditorOpen) return;
-    history.pushState(null, '', ROUTE_EDITOR);
+    // Change path, but preserve query string.
+    const editorURL = new URL(location.href);
+    editorURL.pathname = ROUTE_EDITOR;
+    history.pushState(null, '', editorURL.href);
     this.setState({ isEditorOpen: true });
   }
 
-  render({}: Props, { file, isEditorOpen, Compress }: State) {
+  render({}: Props, { file, isEditorOpen, Compress, awaitingShareTarget }: State) {
+    const showSpinner = awaitingShareTarget || (isEditorOpen && !Compress);
+
     return (
       <div id="app" class={style.app}>
         <file-drop accept="image/*" onfiledrop={this.onFileDrop} class={style.drop}>
-          {!isEditorOpen
+          {
-            ? <Intro onFile={this.onIntroPickFile} showSnack={this.showSnack} />
+            showSpinner
-            : (Compress)
+              ? <loading-spinner class={style.appLoader}/>
-              ? <Compress file={file!} showSnack={this.showSnack} onBack={back} />
+              : isEditorOpen
-              : <loading-spinner class={style.appLoader}/>
+                ? Compress && <Compress file={file!} showSnack={this.showSnack} onBack={back} />
+                : <Intro onFile={this.onIntroPickFile} showSnack={this.showSnack} />
           }
           <snack-bar ref={linkRef(this, 'snackbar')} />
         </file-drop>

src/components/Options/index.tsx

@@ -146,12 +146,14 @@ export default class Options extends Component<Props, State> {
                 {preprocessorState.resize.enabled ?
                   <ResizeOptionsComponent
                     isVector={Boolean(source && source.vectorImage)}
-                    aspect={source ? source.processed.width / source.processed.height : 1}
+                    inputWidth={source ? source.processed.width : 1}
+                    inputHeight={source ? source.processed.height : 1}
                     options={preprocessorState.resize}
                     onChange={this.onResizeOptionsChange}
                   />
                 : null}
               </Expander>
+
               <label class={style.sectionEnabler}>
                 <Checkbox
                   name="quantizer.enable"
@@ -178,6 +180,7 @@ export default class Options extends Component<Props, State> {
           {encoderSupportMap ?
             <Select value={encoderState.type} onChange={this.onEncoderTypeChange} large>
               {encoders.filter(encoder => encoderSupportMap[encoder.type]).map(encoder => (
+                // tslint:disable-next-line:jsx-key
                 <option value={encoder.type}>{encoder.label}</option>
               ))}
             </Select>

src/components/compress/index.tsx

@@ -18,20 +18,14 @@ import * as browserTIFF from '../../codecs/browser-tiff/encoder-meta';
 import * as browserJP2 from '../../codecs/browser-jp2/encoder-meta';
 import * as browserBMP from '../../codecs/browser-bmp/encoder-meta';
 import * as browserPDF from '../../codecs/browser-pdf/encoder-meta';
-import {
+import { EncoderState, EncoderType, EncoderOptions, encoderMap } from '../../codecs/encoders';
-    EncoderState,
+import { PreprocessorState, defaultPreprocessorState } from '../../codecs/preprocessors';
-    EncoderType,
-    EncoderOptions,
-    encoderMap,
-} from '../../codecs/encoders';
-import {
-  PreprocessorState,
-  defaultPreprocessorState,
-} from '../../codecs/preprocessors';
 import { decodeImage } from '../../codecs/decoders';
 import { cleanMerge, cleanSet } from '../../lib/clean-modify';
 import Processor from '../../codecs/processor';
-import { VectorResizeOptions, BitmapResizeOptions } from '../../codecs/resize/processor-meta';
+import {
+  BrowserResizeOptions, isWorkerOptions as isWorkerResizeOptions, isHqx, WorkerResizeOptions,
+} from '../../codecs/resize/processor-meta';
 import './custom-els/MultiPanel';
 import Results from '../results';
 import { ExpandIcon, CopyAcrossIconProps } from '../../lib/icons';
@@ -110,10 +104,24 @@ async function preprocessImage(
     if (preprocessData.resize.method === 'vector' && source.vectorImage) {
       result = processor.vectorResize(
         source.vectorImage,
-        preprocessData.resize as VectorResizeOptions,
+        preprocessData.resize,
       );
+    } else if (isHqx(preprocessData.resize)) {
+      // Hqx can only do x2, x3 or x4.
+      result = await processor.workerResize(result, preprocessData.resize);
+      // Seems like the globals from Rust from hqx and resize are conflicting.
+      // For now we can fix that by terminating the worker.
+      // TODO: Use wasm-bindgen’s new --web target to create a proper ES6 module
+      // and remove this.
+      processor.terminateWorker();
+      // If the target size is not a clean x2, x3 or x4, use Catmull-Rom
+      // for the remaining scaling.
+      const pixelOpts = { ...preprocessData.resize, method: 'catrom' };
+      result = await processor.workerResize(result, pixelOpts as WorkerResizeOptions);
+    } else if (isWorkerResizeOptions(preprocessData.resize)) {
+      result = await processor.workerResize(result, preprocessData.resize);
     } else {
-      result = processor.resize(result, preprocessData.resize as BitmapResizeOptions);
+      result = processor.resize(result, preprocessData.resize as BrowserResizeOptions);
     }
   }
   if (preprocessData.quantizer.enabled) {
@@ -248,7 +256,7 @@ export default class Compress extends Component<Props, State> {
     this.widthQuery.addListener(this.onMobileWidthChange);
     this.updateFile(props.file);
 
-    import('../../lib/offliner').then(({ mainAppLoaded }) => mainAppLoaded());
+    import('../../lib/sw-bridge').then(({ mainAppLoaded }) => mainAppLoaded());
   }
 
   @bind
@@ -441,7 +449,7 @@ export default class Compress extends Component<Props, State> {
         newState = cleanMerge(newState, `sides.${i}.latestSettings.preprocessorState.resize`, {
           width: processed.width,
           height: processed.height,
-          method: vectorImage ? 'vector' : 'browser-high',
+          method: vectorImage ? 'vector' : 'lanczos3',
         });
       }
 
@@ -571,6 +579,7 @@ export default class Compress extends Component<Props, State> {
     const [leftImageData, rightImageData] = sides.map(i => i.data);
 
     const options = sides.map((side, index) => (
+      // tslint:disable-next-line:jsx-key
       <Options
         source={source}
         mobileView={mobileView}
@@ -586,6 +595,7 @@ export default class Compress extends Component<Props, State> {
       (mobileView ? ['down', 'up'] : ['right', 'left']) as CopyAcrossIconProps['copyDirection'][];
 
     const results = sides.map((side, index) => (
+      // tslint:disable-next-line:jsx-key
       <Results
         downloadUrl={side.downloadUrl}
         imageFile={side.file}

src/components/intro/index.tsx

@@ -53,11 +53,17 @@ export default class Intro extends Component<Props, State> {
   state: State = {};
   private fileInput?: HTMLInputElement;
 
+  @bind
+  private resetFileInput() {
+    this.fileInput!.value = '';
+  }
+
   @bind
   private onFileChange(event: Event): void {
     const fileInput = event.target as HTMLInputElement;
     const file = fileInput.files && fileInput.files[0];
     if (!file) return;
+    this.resetFileInput();
     this.props.onFile(file);
   }
 

src/lib/sw-bridge.ts

@@ -40,6 +40,23 @@ async function updateReady(reg: ServiceWorkerRegistration): Promise<void> {
   });
 }
 
+/** Wait for a shared image */
+export function getSharedImage(): Promise<File> {
+  return new Promise((resolve) => {
+    const onmessage = (event: MessageEvent) => {
+      if (event.data.action !== 'load-image') return;
+      resolve(event.data.file);
+      navigator.serviceWorker.removeEventListener('message', onmessage);
+    };
+
+    navigator.serviceWorker.addEventListener('message', onmessage);
+
+    // This message is picked up by the service worker - it's how it knows we're ready to receive
+    // the file.
+    navigator.serviceWorker.controller!.postMessage('share-ready');
+  });
+}
+
 /** Set up the service worker and monitor changes */
 export async function offliner(showSnack: SnackBarElement['showSnackbar']) {
   // This needs to be a typeof because Webpack.

src/manifest.json

@@ -11,6 +11,25 @@
       "src": "/assets/icon-large.png",
       "type": "image/png",
       "sizes": "1024x1024"
+    },
+    {
+      "src": "/assets/icon-large-maskable.png",
+      "type": "image/png",
+      "sizes": "1024x1024",
+      "purpose": "maskable"
     }
-  ]
+  ],
+  "share_target": {
+    "action": "/?share-target",
+    "method": "POST",
+    "enctype": "multipart/form-data",
+    "params": {
+      "files": [
+        {
+          "name": "file",
+          "accept": ["image/*"]
+        }
+      ]
+    }
+  }
 }

src/sw/index.ts

@@ -1,5 +1,6 @@
 import {
   cacheOrNetworkAndCache, cleanupCache, cacheOrNetwork, cacheBasics, cacheAdditionalProcessors,
+  serveShareTarget,
 } from './util';
 import { get } from 'idb-keyval';
 
@@ -40,14 +41,23 @@ self.addEventListener('activate', (event) => {
 });
 
 self.addEventListener('fetch', (event) => {
-  // We only care about GET.
-  if (event.request.method !== 'GET') return;
-
   const url = new URL(event.request.url);
 
   // Don't care about other-origin URLs
   if (url.origin !== location.origin) return;
 
+  if (
+    url.pathname === '/' &&
+    url.searchParams.has('share-target') &&
+    event.request.method === 'POST'
+  ) {
+    serveShareTarget(event);
+    return;
+  }
+
+  // We only care about GET from here on in.
+  if (event.request.method !== 'GET') return;
+
   if (url.pathname.startsWith('/demo-') || url.pathname.startsWith('/wc-polyfill')) {
     cacheOrNetworkAndCache(event, dynamicCache);
     cleanupCache(event, dynamicCache, BUILD_ASSETS);

src/sw/util.ts

@@ -1,8 +1,11 @@
 import webpDataUrl from 'url-loader!../codecs/tiny.webp';
 
+// Give TypeScript the correct global.
+declare var self: ServiceWorkerGlobalScope;
+
 export function cacheOrNetwork(event: FetchEvent): void {
   event.respondWith(async function () {
-    const cachedResponse = await caches.match(event.request);
+    const cachedResponse = await caches.match(event.request, { ignoreSearch: true });
     return cachedResponse || fetch(event.request);
   }());
 }
@@ -29,6 +32,23 @@ export function cacheOrNetworkAndCache(event: FetchEvent, cacheName: string): vo
   }());
 }
 
+export function serveShareTarget(event: FetchEvent): void {
+  const dataPromise = event.request.formData();
+
+  // Redirect so the user can refresh the page without resending data.
+  // @ts-ignore It doesn't like me giving a response to respondWith, although it's allowed.
+  event.respondWith(Response.redirect('/?share-target'));
+
+  event.waitUntil(async function () {
+    // The page sends this message to tell the service worker it's ready to receive the file.
+    await nextMessage('share-ready');
+    const client = await self.clients.get(event.resultingClientId);
+    const data = await dataPromise;
+    const file = data.get('file');
+    client.postMessage({ file, action: 'load-image' });
+  }());
+}
+
 export function cleanupCache(event: FetchEvent, cacheName: string, keepAssets: string[]) {
   event.waitUntil(async function () {
     const cache = await caches.open(cacheName);
@@ -104,3 +124,26 @@ export async function cacheAdditionalProcessors(cacheName: string, buildAssets:
   const cache = await caches.open(cacheName);
   await cache.addAll(toCache);
 }
+
+const nextMessageResolveMap = new Map<string, (() => void)[]>();
+
+/**
+ * Wait on a message with a particular event.data value.
+ *
+ * @param dataVal The event.data value.
+ */
+function nextMessage(dataVal: string): Promise<void> {
+  return new Promise((resolve) => {
+    if (!nextMessageResolveMap.has(dataVal)) {
+      nextMessageResolveMap.set(dataVal, []);
+    }
+    nextMessageResolveMap.get(dataVal)!.push(resolve);
+  });
+}
+
+self.addEventListener('message', (event) => {
+  const resolvers = nextMessageResolveMap.get(event.data);
+  if (!resolvers) return;
+  nextMessageResolveMap.delete(event.data);
+  for (const resolve of resolvers) resolve();
+});

tslint.json

@@ -12,7 +12,8 @@
     "variable-name": [true, "check-format", "allow-leading-underscore"],
     "no-duplicate-imports": false,
     "prefer-template": [true, "allow-single-concat"],
-    "import-name": false
+    "import-name": false,
+    "jsx-key": false
   },
   "linterOptions": {
     "exclude": [

webpack.config.js

@@ -1,4 +1,3 @@
-const fs = require('fs');
 const path = require('path');
 const webpack = require('webpack');
 const CleanPlugin = require('clean-webpack-plugin');
@@ -17,11 +16,7 @@ const CrittersPlugin = require('critters-webpack-plugin');
 const AssetTemplatePlugin = require('./config/asset-template-plugin');
 const addCssTypes = require('./config/add-css-types');
 
-function readJson (filename) {
+const VERSION = require('./package.json').version;
-  return JSON.parse(fs.readFileSync(filename));
-}
-
-const VERSION = readJson('./package.json').version;
 
 module.exports = async function (_, env) {
   const isProd = env.mode === 'production';
@@ -147,11 +142,14 @@ module.exports = async function (_, env) {
         },
         {
           // All the codec files define a global with the same name as their file name. `exports-loader` attaches those to `module.exports`.
-          test: /\/codecs\/.*\.js$/,
+          test: /\.js$/,
+          include: path.join(__dirname, 'src/codecs'),
           loader: 'exports-loader'
         },
         {
-          test: /\/codecs\/.*\.wasm$/,
+          // Emscripten modules don't work with Webpack's Wasm loader.
+          test: /\.wasm$/,
+          exclude: /_bg\.wasm$/,
           // This is needed to make webpack NOT process wasm files.
           // See https://github.com/webpack/webpack/issues/6725
           type: 'javascript/auto',
@@ -160,6 +158,11 @@ module.exports = async function (_, env) {
             name: '[name].[hash:5].[ext]',
           },
         },
+        {
+          // Wasm modules generated by Rust + wasm-pack work great with Webpack.
+          test: /_bg\.wasm$/,
+          type: 'webassembly/experimental',
+        },
         {
           test: /\.(png|svg|jpg|gif)$/,
           loader: 'file-loader',
@@ -172,7 +175,7 @@ module.exports = async function (_, env) {
     plugins: [
       new webpack.IgnorePlugin(
         /(fs|crypto|path)/,
-        new RegExp(`${path.sep}codecs${path.sep}`)
+        /[/\\]codecs[/\\]/
       ),
 
       // Pretty progressbar showing build progress:
@@ -239,7 +242,7 @@ module.exports = async function (_, env) {
           removeRedundantAttributes: true,
           removeComments: true
         },
-        manifest: readJson('./src/manifest.json'),
+        manifest: require('./src/manifest.json'),
         inject: 'body',
         compile: true
       }),