Make emscripten with threads compile

Attempt at threads for webp encoder
2025-11-12 16:57:26 +00:00 · 2018-11-02 18:34:23 +00:00 · 2018-11-01 22:36:38 +00:00
18 changed files with 379 additions and 211 deletions
--- a/codecs/really_big.jpg
+++ b/codecs/really_big.jpg
--- a/codecs/webp_enc/build.sh
+++ b/codecs/webp_enc/build.sh
@@ -14,9 +14,12 @@ echo "============================================="
  emcc \
    ${OPTIMIZE} \
    --bind \
-    -s ALLOW_MEMORY_GROWTH=1 \
+    -D WEBP_USE_THREAD=1 \
-    -s MODULARIZE=1 \
+    -s USE_PTHREADS=1 \
-    -s 'EXPORT_NAME="webp_enc"' \
+    -s ASSERTIONS=1 \
    -s PTHREAD_POOL_SIZE=4 \
    -s TOTAL_MEMORY=268435456 \
    -s WASM_MEM_MAX=268435456 \
    --std=c++11 \
    -I node_modules/libwebp \
    -o ./webp_enc.js \
--- a/codecs/webp_enc/example.html
+++ b/codecs/webp_enc/example.html
@@ -1,7 +1,7 @@
 <!doctype html>
 <script src='webp_enc.js'></script>
 <script>
-  const module = webp_enc();
+  // const Module = webp_enc();
  async function loadImage(src) {
    // Load image
@@ -17,10 +17,11 @@
    return ctx.getImageData(0, 0, img.width, img.height);
  }
-  module.onRuntimeInitialized = async _ => {
+  Module.onRuntimeInitialized = async _ => {
-    console.log('Version:', module.version().toString(16));
+    console.log('Version:', Module.version().toString(16));
-    const image = await loadImage('../example.png');
+    const image = await loadImage('../really_big.jpg');
-    const result = module.encode(image.data, image.width, image.height, {
+    let start = performance.now();
    const result = Module.encode(image.data, image.width, image.height, {
      quality: 75,
      target_size: 0,
      target_PSNR: 0,
@@ -43,16 +44,18 @@
      exact: 0,
      image_hint: 0,
      emulate_jpeg_size: 0,
-      thread_level: 0,
+      thread_level: 1,
      low_memory: 0,
      near_lossless: 100,
      use_delta_palette: 0,
      use_sharp_yuv: 0,
    });
    let stop = performance.now();
    console.log('size', result.length);
-    const blob = new Blob([result], {type: 'image/webp'});
+    console.log('time', stop - start);
    const blob = new Blob([new Uint8Array(result)], {type: 'image/webp'});
-    module.free_result();
+    Module.free_result();
    const blobURL = URL.createObjectURL(blob);
    const img = document.createElement('img');
--- a/codecs/webp_enc/pthread-main.js
+++ b/codecs/webp_enc/pthread-main.js
@@ -0,0 +1,192 @@
 // Copyright 2015 The Emscripten Authors.  All rights reserved.
 // Emscripten is available under two separate licenses, the MIT license and the
 // University of Illinois/NCSA Open Source License.  Both these licenses can be
 // found in the LICENSE file.
 // Pthread Web Worker startup routine:
 // This is the entry point file that is loaded first by each Web Worker
 // that executes pthreads on the Emscripten application.
 // Thread-local:
 var threadInfoStruct = 0; // Info area for this thread in Emscripten HEAP (shared). If zero, this worker is not currently hosting an executing pthread.
 var selfThreadId = 0; // The ID of this thread. 0 if not hosting a pthread.
 var parentThreadId = 0; // The ID of the parent pthread that launched this thread.
 var tempDoublePtr = 0; // A temporary memory area for global float and double marshalling operations.
 // Thread-local: Each thread has its own allocated stack space.
 var STACK_BASE = 0;
 var STACKTOP = 0;
 var STACK_MAX = 0;
 // These are system-wide memory area parameters that are set at main runtime startup in main thread, and stay constant throughout the application.
 var buffer; // All pthreads share the same Emscripten HEAP as SharedArrayBuffer with the main execution thread.
 var DYNAMICTOP_PTR = 0;
 var TOTAL_MEMORY = 0;
 var STATICTOP = 0;
 var staticSealed = true; // When threads are being initialized, the static memory area has been already sealed a long time ago.
 var DYNAMIC_BASE = 0;
 var ENVIRONMENT_IS_PTHREAD = true;
 // performance.now() is specced to return a wallclock time in msecs since that Web Worker/main thread launched. However for pthreads this can cause
 // subtle problems in emscripten_get_now() as this essentially would measure time from pthread_create(), meaning that the clocks between each threads
 // would be wildly out of sync. Therefore sync all pthreads to the clock on the main browser thread, so that different threads see a somewhat
 // coherent clock across each of them (+/- 0.1msecs in testing)
 var __performance_now_clock_drift = 0;
 // Cannot use console.log or console.error in a web worker, since that would risk a browser deadlock! https://bugzilla.mozilla.org/show_bug.cgi?id=1049091
 // Therefore implement custom logging facility for threads running in a worker, which queue the messages to main thread to print.
 var Module = {};
 // When error objects propagate from Web Worker to main thread, they lose helpful call stack and thread ID information, so print out errors early here,
 // before that happens.
 this.addEventListener('error', function(e) {
  if (e.message.indexOf('SimulateInfiniteLoop') != -1) return e.preventDefault();
  var errorSource = ' in ' + e.filename + ':' + e.lineno + ':' + e.colno;
  console.error('Pthread ' + selfThreadId + ' uncaught exception' + (e.filename || e.lineno || e.colno ? errorSource : '') + ': ' + e.message + '. Error object:');
  console.error(e.error);
 });
 function threadPrint() {
  var text = Array.prototype.slice.call(arguments).join(' ');
  console.log(text);
 }
 function threadPrintErr() {
  var text = Array.prototype.slice.call(arguments).join(' ');
  console.error(text);
  console.error(new Error().stack);
 }
 function threadAlert() {
  var text = Array.prototype.slice.call(arguments).join(' ');
  postMessage({cmd: 'alert', text: text, threadId: selfThreadId});
 }
 out = threadPrint;
 err = threadPrintErr;
 this.alert = threadAlert;
 // #if WASM
 Module['instantiateWasm'] = function(info, receiveInstance) {
  // Instantiate from the module posted from the main thread.
  // We can just use sync instantiation in the worker.
  instance = new WebAssembly.Instance(Module['wasmModule'], info);
  // We don't need the module anymore; new threads will be spawned from the main thread.
  delete Module['wasmModule'];
  receiveInstance(instance);
  return instance.exports;
 }
 //#endif
 this.onmessage = function(e) {
  try {
    if (e.data.cmd === 'load') { // Preload command that is called once per worker to parse and load the Emscripten code.
      // Initialize the thread-local field(s):
      tempDoublePtr = e.data.tempDoublePtr;
      // Initialize the global "process"-wide fields:
      Module['TOTAL_MEMORY'] = TOTAL_MEMORY = e.data.TOTAL_MEMORY;
      STATICTOP = e.data.STATICTOP;
      DYNAMIC_BASE = e.data.DYNAMIC_BASE;
      DYNAMICTOP_PTR = e.data.DYNAMICTOP_PTR;
 //#if WASM
      if (e.data.wasmModule) {
        // Module and memory were sent from main thread
        Module['wasmModule'] = e.data.wasmModule;
        Module['wasmMemory'] = e.data.wasmMemory;
        buffer = Module['wasmMemory'].buffer;
      } else {
 //#else
        buffer = e.data.buffer;
      }
 //#endif
      PthreadWorkerInit = e.data.PthreadWorkerInit;
      if (typeof e.data.urlOrBlob === 'string') {
        importScripts(e.data.urlOrBlob);
      } else {
        var objectUrl = URL.createObjectURL(e.data.urlOrBlob);
        importScripts(objectUrl);
        URL.revokeObjectURL(objectUrl);
      }
 //#if !ASMFS
      if (typeof FS !== 'undefined' && typeof FS.createStandardStreams === 'function') FS.createStandardStreams();
 //#endif
      postMessage({ cmd: 'loaded' });
    } else if (e.data.cmd === 'objectTransfer') {
      PThread.receiveObjectTransfer(e.data);
    } else if (e.data.cmd === 'run') { // This worker was idle, and now should start executing its pthread entry point.
      __performance_now_clock_drift = performance.now() - e.data.time; // Sync up to the clock of the main thread.
      threadInfoStruct = e.data.threadInfoStruct;
      __register_pthread_ptr(threadInfoStruct, /*isMainBrowserThread=*/0, /*isMainRuntimeThread=*/0); // Pass the thread address inside the asm.js scope to store it for fast access that avoids the need for a FFI out.
      assert(threadInfoStruct);
      selfThreadId = e.data.selfThreadId;
      parentThreadId = e.data.parentThreadId;
      assert(selfThreadId);
      assert(parentThreadId);
      // TODO: Emscripten runtime has these variables twice(!), once outside the asm.js module, and a second time inside the asm.js module.
      //       Review why that is? Can those get out of sync?
      STACK_BASE = STACKTOP = e.data.stackBase;
      STACK_MAX = STACK_BASE + e.data.stackSize;
      assert(STACK_BASE != 0);
      assert(STACK_MAX > STACK_BASE);
      Module['establishStackSpace'](e.data.stackBase, e.data.stackBase + e.data.stackSize);
      var result = 0;
 //#if STACK_OVERFLOW_CHECK
      if (typeof writeStackCookie === 'function') writeStackCookie();
 //#endif
      PThread.receiveObjectTransfer(e.data);
      PThread.setThreadStatus(_pthread_self(), 1/*EM_THREAD_STATUS_RUNNING*/);
      try {
        // pthread entry points are always of signature 'void *ThreadMain(void *arg)'
        // Native codebases sometimes spawn threads with other thread entry point signatures,
        // such as void ThreadMain(void *arg), void *ThreadMain(), or void ThreadMain().
        // That is not acceptable per C/C++ specification, but x86 compiler ABI extensions
        // enable that to work. If you find the following line to crash, either change the signature
        // to "proper" void *ThreadMain(void *arg) form, or try linking with the Emscripten linker
        // flag -s EMULATE_FUNCTION_POINTER_CASTS=1 to add in emulation for this x86 ABI extension.
        result = Module['dynCall_ii'](e.data.start_routine, e.data.arg);
 //#if STACK_OVERFLOW_CHECK
        if (typeof checkStackCookie === 'function') checkStackCookie();
 //#endif
      } catch(e) {
        if (e === 'Canceled!') {
          PThread.threadCancel();
          return;
        } else if (e === 'SimulateInfiniteLoop') {
          return;
        } else {
          Atomics.store(HEAPU32, (threadInfoStruct + 4 /*{{{ C_STRUCTS.pthread.threadExitCode }}}*/ ) >> 2, (e instanceof ExitStatus) ? e.status : -2 /*A custom entry specific to Emscripten denoting that the thread crashed.*/);
          Atomics.store(HEAPU32, (threadInfoStruct + 0 /*{{{ C_STRUCTS.pthread.threadStatus }}}*/ ) >> 2, 1); // Mark the thread as no longer running.
          _emscripten_futex_wake(threadInfoStruct + 0 /*{{{ C_STRUCTS.pthread.threadStatus }}}*/, 0x7FFFFFFF/*INT_MAX*/); // Wake all threads waiting on this thread to finish.
          if (!(e instanceof ExitStatus)) throw e;
        }
      }
      // The thread might have finished without calling pthread_exit(). If so, then perform the exit operation ourselves.
      // (This is a no-op if explicit pthread_exit() had been called prior.)
      PThread.threadExit(result);
    } else if (e.data.cmd === 'cancel') { // Main thread is asking for a pthread_cancel() on this thread.
      if (threadInfoStruct && PThread.thisThreadCancelState == 0/*PTHREAD_CANCEL_ENABLE*/) {
        PThread.threadCancel();
      }
    } else if (e.data.target === 'setimmediate') {
      // no-op
    } else if (e.data.cmd === 'processThreadQueue') {
      if (threadInfoStruct) { // If this thread is actually running?
        _emscripten_current_thread_process_queued_calls();
      }
    } else {
      err('pthread-main.js received unknown command ' + e.data.cmd);
      console.error(e.data);
    }
  } catch(e) {
    console.error('pthread-main.js onmessage() captured an uncaught exception: ' + e);
    console.error(e.stack);
    throw e;
  }
 }
--- a/codecs/webp_enc/webp_enc.js
+++ b/codecs/webp_enc/webp_enc.js
--- a/codecs/webp_enc/webp_enc.js.mem
+++ b/codecs/webp_enc/webp_enc.js.mem
--- a/codecs/webp_enc/webp_enc.wasm
+++ b/codecs/webp_enc/webp_enc.wasm
--- a/src/components/App/index.tsx
+++ b/src/components/App/index.tsx
@@ -74,7 +74,7 @@ export default class App extends Component<Props, State> {
  render({}: Props, { file, Compress }: State) {
    return (
      <div id="app" class={style.app}>
-        <file-drop accept="image/*" onfiledrop={this.onFileDrop} class={style.drop}>
+        <file-drop accept="image/*" onfiledrop={this.onFileDrop}>
          {(!file)
            ? <Intro onFile={this.onIntroPickFile} onError={this.showError} />
            : (Compress)
--- a/src/components/App/style.scss
+++ b/src/components/App/style.scss
@@ -12,14 +12,14 @@ Note: These styles are temporary. They will be replaced before going live.
  contain: strict;
 }
-.drop {
+:global {
-  overflow: hidden;
+  file-drop {
-  touch-action: none;
+    overflow: hidden;
-  height: 100%;
+    touch-action: none;
-  width: 100%;
+    height:100%;
    width:100%;
-  &:global {
+    &:after {
    &::after {
      content: '';
      position: absolute;
      display: block;
@@ -28,20 +28,28 @@ Note: These styles are temporary. They will be replaced before going live.
      right: 10px;
      bottom: 10px;
      border: 2px dashed #fff;
      background-color:rgba(88, 116, 88, 0.2);
      border-color: rgba(65, 129, 65, 0.5);
      border-radius: 10px;
      opacity: 0;
      transform: scale(0.95);
-      transition: all 200ms ease-in;
+      transition: opacity 300ms ease, transform 300ms cubic-bezier(.6,2,.6,1), background-color 300ms step-end, border-color 300ms step-end;
      transition-property: transform, opacity;
      pointer-events: none;
    }
-    &.drop-valid::after {
+    &.drop-valid:after,
    &.drop-invalid:after {
      opacity: 1;
      transform: scale(1);
-      transition-timing-function: ease-out;
+      transition: opacity 300ms ease, transform 300ms cubic-bezier(.6,2,.6,1);
    }
    &.drop-valid:after {
      background-color:rgba(88, 116, 88, 0.2);
      border-color: rgba(65, 129, 65, 0.5);
    }
    &.drop-invalid:after {
      background-color:rgba(119, 85, 85, 0.2);
      border-color:rgba(129, 63, 63, 0.5);
    }
  }
 }
--- a/src/components/Output/custom-els/PinchZoom/index.ts
+++ b/src/components/Output/custom-els/PinchZoom/index.ts
@@ -145,7 +145,7 @@ export default class PinchZoom extends HTMLElement {
    const relativeToEl = (relativeTo === 'content' ? this._positioningEl : this);
    // No content element? Fall back to just setting scale
-    if (!relativeToEl || !this._positioningEl) {
+    if (!relativeToEl) {
      this.setTransform({ scale, allowChangeEvent });
      return;
    }
@@ -157,10 +157,6 @@ export default class PinchZoom extends HTMLElement {
    if (relativeTo === 'content') {
      originX += this.x;
      originY += this.y;
    } else {
      const currentRect = this._positioningEl.getBoundingClientRect();
      originX -= currentRect.left;
      originY -= currentRect.top;
    }
    this._applyChange({
--- a/src/components/Output/custom-els/TwoUp/index.ts
+++ b/src/components/Output/custom-els/TwoUp/index.ts
@@ -68,14 +68,12 @@ export default class TwoUp extends HTMLElement {
  }
  connectedCallback() {
-    this._childrenChange();
+    this._handle.innerHTML = `<div class="${styles.scrubber}">${
      '<svg viewBox="0 0 20 10" fill="currentColor"><path d="M8 0v10L0 5zM12 0v10l8-5z"/></svg>'
    }</div>`;
    this._childrenChange();
    if (!this._everConnected) {
      this._handle.innerHTML = `<div class="${styles.scrubber}">${
        `<svg viewBox="0 0 27 20" fill="currentColor">${
          '<path d="M17 19.2l9.5-9.6L16.9 0zM9.6 0L0 9.6l9.6 9.6z"/>'
        }</svg>`
      }</div>`;
      this._resetPosition();
      this._everConnected = true;
    }
--- a/src/components/Output/custom-els/TwoUp/styles.css
+++ b/src/components/Output/custom-els/TwoUp/styles.css
@@ -6,41 +6,29 @@ two-up {
  --track-color: var(--accent-color);
  --thumb-background: #fff;
  --thumb-color: var(--accent-color);
  --thumb-size: 62px;
  --bar-size: 6px;
  --bar-touch-size: 30px;
 }
 two-up > * {
-  /* Overlay all children on top of each other, and let two-up's layout contain all of them. */
+  /* Overlay all children on top of each other, and let
  two-up's layout contain all of them. */
  grid-area: 1/1;
 }
-two-up[legacy-clip-compat] > :not(.two-up-handle) {
+two-up[legacy-clip-compat] > :not(.twoUpHandle) {
  /* Legacy mode uses clip rather than clip-path (Edge doesn't support clip-path), but clip requires
  elements to be positioned absolutely */
  position: absolute;
 }
-.two-up-handle {
+.twoUpHandle {
  touch-action: none;
  position: relative;
-  width: var(--bar-touch-size);
+  width: 10px;
  background: var(--track-color);
  transform: translateX(var(--split-point)) translateX(-50%);
  box-shadow: inset 4px 0 0 rgba(0,0,0,0.1), 0 1px 4px rgba(0,0,0,0.4);
  will-change: transform;
  cursor: ew-resize;
 }
 .two-up-handle::before {
  content: '';
  display: block;
  height: 100%;
  width: var(--bar-size);
  margin: 0 auto;
  box-shadow: inset calc(var(--bar-size) / 2) 0 0 rgba(0,0,0,0.1), 0 1px 4px rgba(0,0,0,0.4);
  background: var(--track-color);
 }
 .scrubber {
  display: flex;
  position: absolute;
@@ -48,56 +36,51 @@ two-up[legacy-clip-compat] > :not(.two-up-handle) {
  left: 50%;
  transform-origin: 50% 50%;
  transform: translate(-50%, -50%);
-  width: var(--thumb-size);
+  width: 62px;
-  height: calc(var(--thumb-size) * 0.9);
+  height: 56px;
  background: var(--thumb-background);
  border: 1px solid rgba(0,0,0,0.2);
-  border-radius: calc(var(--thumb-size) * 0.08);
+  border-radius: 5px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
  color: var(--thumb-color);
  box-sizing: border-box;
  padding: 0 48%;
 }
 .scrubber svg {
  flex: 1;
  margin: 0 10px;
 }
-two-up[orientation='vertical'] .two-up-handle {
+two-up[orientation='vertical'] .twoUpHandle {
  width: auto;
-  height: var(--bar-touch-size);
+  height: 7px;
  transform: translateY(var(--split-point)) translateY(-50%);
  box-shadow: inset 0 3px 0 rgba(0,0,0,0.1), 0 1px 4px rgba(0,0,0,0.4);
  cursor: ns-resize;
 }
 two-up[orientation='vertical'] .two-up-handle::before {
  width: auto;
  height: var(--bar-size);
  box-shadow: inset 0 calc(var(--bar-size) / 2) 0 rgba(0,0,0,0.1), 0 1px 4px rgba(0,0,0,0.4);
  margin: calc((var(--bar-touch-size) - var(--bar-size)) / 2) 0 0 0;
 }
 two-up[orientation='vertical'] .scrubber {
  width: 46px;
  height: 40px;
  font-size: 18px;
  box-shadow: 1px 0 4px rgba(0,0,0,0.1);
  transform: translate(-50%, -50%) rotate(-90deg);
 }
-two-up > :nth-child(1):not(.two-up-handle) {
+two-up > :nth-child(1):not(.twoUpHandle) {
  -webkit-clip-path: inset(0 calc(100% - var(--split-point)) 0 0);
  clip-path: inset(0 calc(100% - var(--split-point)) 0 0);
 }
-two-up > :nth-child(2):not(.two-up-handle) {
+two-up > :nth-child(2):not(.twoUpHandle) {
  -webkit-clip-path: inset(0 0 0 var(--split-point));
  clip-path: inset(0 0 0 var(--split-point));
 }
-two-up[orientation='vertical'] > :nth-child(1):not(.two-up-handle) {
+two-up[orientation='vertical'] > :nth-child(1):not(.twoUpHandle) {
  -webkit-clip-path: inset(0 0 calc(100% - var(--split-point)) 0);
  clip-path: inset(0 0 calc(100% - var(--split-point)) 0);
 }
-two-up[orientation='vertical'] > :nth-child(2):not(.two-up-handle) {
+two-up[orientation='vertical'] > :nth-child(2):not(.twoUpHandle) {
  -webkit-clip-path: inset(var(--split-point) 0 0 0);
  clip-path: inset(var(--split-point) 0 0 0);
 }
@@ -107,19 +90,19 @@ two-up[orientation='vertical'] > :nth-child(2):not(.two-up-handle) {
  It performs way better in Safari.
 */
@supports not ((clip-path: inset(0 0 0 0)) or (-webkit-clip-path: inset(0 0 0 0))) {
-  two-up[legacy-clip-compat] > :nth-child(1):not(.two-up-handle) {
+  two-up[legacy-clip-compat] > :nth-child(1):not(.twoUpHandle) {
    clip: rect(auto var(--split-point) auto auto);
  }
-  two-up[legacy-clip-compat] > :nth-child(2):not(.two-up-handle) {
+  two-up[legacy-clip-compat] > :nth-child(2):not(.twoUpHandle) {
    clip: rect(auto auto auto var(--split-point));
  }
-  two-up[orientation='vertical'][legacy-clip-compat] > :nth-child(1):not(.two-up-handle) {
+  two-up[orientation='vertical'][legacy-clip-compat] > :nth-child(1):not(.twoUpHandle) {
    clip: rect(auto auto var(--split-point) auto);
  }
-  two-up[orientation='vertical'][legacy-clip-compat] > :nth-child(2):not(.two-up-handle) {
+  two-up[orientation='vertical'][legacy-clip-compat] > :nth-child(2):not(.twoUpHandle) {
    clip: rect(var(--split-point) auto auto auto);
  }
 }
--- a/src/components/Output/index.tsx
+++ b/src/components/Output/index.tsx
@@ -113,19 +113,14 @@ export default class Output extends Component<Props, State> {
  }
  @bind
-  private onScaleValueFocus() {
+  private editScale() {
    this.setState({ editingScale: true }, () => {
-      if (this.scaleInput) {
+      if (this.scaleInput) this.scaleInput.focus();
        // Firefox unfocuses the input straight away unless I force a style calculation here. I have
        // no idea why, but it's late and I'm quite tired.
        getComputedStyle(this.scaleInput).transform;
        this.scaleInput.focus();
      }
    });
  }
  @bind
-  private onScaleInputBlur() {
+  private cancelEditScale() {
    this.setState({ editingScale: false });
  }
@@ -193,7 +188,6 @@ export default class Output extends Component<Props, State> {
      <div class={`${style.output} ${altBackground ? style.altBackground : ''}`}>
        <two-up
          legacy-clip-compat
          class={style.twoUp}
          orientation={orientation}
          // Event redirecting. See onRetargetableEvent.
          onTouchStartCapture={this.onRetargetableEvent}
@@ -204,7 +198,6 @@ export default class Output extends Component<Props, State> {
          onWheelCapture={this.onRetargetableEvent}
        >
          <pinch-zoom
            class={style.pinchZoom}
            onChange={this.onPinchZoomLeftChange}
            ref={linkRef(this, 'pinchZoomLeft')}
          >
@@ -220,7 +213,7 @@ export default class Output extends Component<Props, State> {
              }}
            />
          </pinch-zoom>
-          <pinch-zoom class={style.pinchZoom} ref={linkRef(this, 'pinchZoomRight')}>
+          <pinch-zoom ref={linkRef(this, 'pinchZoomRight')}>
            <canvas
              class={style.outputCanvas}
              ref={linkRef(this, 'canvasRight')}
@@ -236,7 +229,7 @@ export default class Output extends Component<Props, State> {
        </two-up>
        <div class={style.controls}>
-          <div class={style.zoomControls}>
+          <div class={style.group}>
            <button class={style.button} onClick={this.zoomOut}>
              <RemoveIcon />
            </button>
@@ -250,11 +243,11 @@ export default class Output extends Component<Props, State> {
                class={style.zoom}
                value={Math.round(scale * 100)}
                onInput={this.onScaleInputChanged}
-                onBlur={this.onScaleInputBlur}
+                onBlur={this.cancelEditScale}
              />
            ) : (
-              <span class={style.zoom} tabIndex={0} onFocus={this.onScaleValueFocus}>
+              <span class={style.zoom} tabIndex={0} onFocus={this.editScale}>
-                <span class={style.zoomValue}>{Math.round(scale * 100)}</span>
+                <strong>{Math.round(scale * 100)}</strong>
                %
              </span>
            )}
--- a/src/components/Output/style.scss
+++ b/src/components/Output/style.scss
@@ -2,68 +2,134 @@
 Note: These styles are temporary. They will be replaced before going live.
 */
-.output {
+%fill {
-  composes: abs-fill from '../../lib/util.scss';
+  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  contain: strict;
 }
-  &::before {
+.output {
  @extend %fill;
  &:before {
    content: '';
-    position: absolute;
+    @extend %fill;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #000;
    opacity: 0;
    transition: opacity 500ms ease;
  }
-
+  &.altBackground:before {
-  &.alt-background::before {
+    opacity: .6;
    opacity: 0.6;
  }
 }
-.two-up {
+  > two-up {
-  composes: abs-fill from '../../lib/util.scss';
+    @extend %fill;
-  --accent-color: var(--button-fg);
+    --accent-color: var(--button-fg);
 }
-.pinch-zoom {
+    > pinch-zoom {
-  composes: abs-fill from '../../lib/util.scss';
+      @extend %fill;
-  outline: none;
+      outline: none;
-  display: flex;
+      display: flex;
-  justify-content: center;
+      justify-content: center;
-  align-items: center;
+      align-items: center;
    }
  }
 }
 .controls {
  position: absolute;
  display: flex;
  justify-content: center;
-  top: 0;
+  left: 220px;
-  left: 0;
+  right: 220px;
-  right: 0;
+  bottom: 0;
  padding: 9px;
  overflow: hidden;
  flex-wrap: wrap;
  contain: content;
-  @media (min-width: 680px) {
+  @media (max-width: 680px) {
-    top: auto;
+    top: 0;
-    left: 220px;
+    bottom: auto;
-    right: 220px;
+    left: 0;
-    bottom: 0;
+    right: 0;
  }
 }
-.zoom-controls {
+  > * {
-  display: flex;
+    z-index: 2;
  }
-  & :not(:first-child) {
+  .group {
    display: flex;
  }
  .button,
  .zoom {
    display: flex;
    align-items: center;
    flex: 0;
    box-sizing: border-box;
    height: 48px;
    padding: 0 16px;
    margin: 4px;
    background-color: #fff;
    border: 1px solid rgba(0,0,0,0.2);
    border-radius: 5px;
    line-height: 1;
    font-size: 110%;
    white-space: nowrap;
    &:focus {
      box-shadow: 0 0 0 2px var(--button-fg);
      outline: none;
      z-index: 1;
    }
  }
  .button {
    text-transform: uppercase;
    color: var(--button-fg);
    cursor: pointer;
    text-indent: 6px;
  }
  .button:hover {
    background-color: #eee;
  }
  .zoom {
    flex: 0 0 6em;
    color: #625E80;
    font: inherit;
    cursor: text;
    width: 6em;
    text-align: center;
    justify-content: center;
    &:focus {
      box-shadow: inset 0 1px 4px rgba(0,0,0,0.2), 0 0 0 2px var(--button-fg);
    }
    strong {
      position: relative;
      top: 1px;
      margin: 0 3px 0 0;
      color: #888;
      font-weight: normal;
      border-bottom: 1px dashed #999;
    }
  }
  .group > :not(:first-child) {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
    margin-left: 0;
  }
-  & :not(:last-child) {
+  .group > :not(:last-child) {
    margin-right: 0;
    border-right-width: 0;
    border-top-right-radius: 0;
@@ -71,60 +137,6 @@ Note: These styles are temporary. They will be replaced before going live.
  }
 }
 .button,
 .zoom {
  display: flex;
  align-items: center;
  box-sizing: border-box;
  height: 48px;
  padding: 0 16px;
  margin: 4px;
  background-color: #fff;
  border: 1px solid rgba(0,0,0,0.2);
  border-radius: 5px;
  line-height: 1;
  white-space: nowrap;
  &:focus {
    box-shadow: 0 0 0 2px var(--button-fg);
    outline: none;
    z-index: 1;
  }
 }
 .button {
  text-transform: uppercase;
  color: var(--button-fg);
  cursor: pointer;
  text-indent: 6px;
  font-size: 110%;
  &:hover {
    background-color: #eee;
  }
 }
 .zoom {
  color: #625E80;
  cursor: text;
  width: 6em;
  font: inherit;
  text-align: center;
  justify-content: center;
  &:focus {
    box-shadow: inset 0 1px 4px rgba(0,0,0,0.2), 0 0 0 2px var(--button-fg);
  }
 }
 .zoom-value {
  position: relative;
  top: 1px;
  margin: 0 3px 0 0;
  color: #888;
  border-bottom: 1px dashed #999;
 }
 .output-canvas {
  flex-shrink: 0;
 }
--- a/src/components/compress/style.scss
+++ b/src/components/compress/style.scss
@@ -4,6 +4,7 @@
 .option-pair {
  display: flex;
  justify-content: flex-end;
  width: 100%;
  height: 100%;
@@ -14,6 +15,5 @@
  &.vertical {
    flex-direction: column;
    justify-content: flex-end;
  }
 }
--- a/src/init-app.tsx
+++ b/src/init-app.tsx
@@ -16,7 +16,6 @@ if (process.env.NODE_ENV === 'development') {
  // When an update to any module is received, re-import the app and trigger a full re-render:
  module.hot.accept('./components/App', () => {
    // The linter doesn't like the capital A in App. It is wrong.
    // tslint:disable-next-line variable-name
    import('./components/App').then(({ default: App }) => {
      root = render(<App />, document.body, root);
--- a/src/lib/icons.tsx
+++ b/src/lib/icons.tsx
@@ -2,29 +2,31 @@ import { h } from 'preact';
 // tslint:disable:max-line-length variable-name
-const Icon = (props: JSX.HTMLAttributes) => (
+export interface IconProps extends JSX.HTMLAttributes {}
 const Icon = (props: IconProps) => (
  <svg width="24" height="24" viewBox="0 0 24 24" fill="currentColor" {...props} />
 );
-export const DownloadIcon = (props: JSX.HTMLAttributes) => (
+export const DownloadIcon = (props: IconProps) => (
  <Icon {...props}>
    <path d="M19.35 10.04A7.49 7.49 0 0 0 12 4C9.11 4 6.6 5.64 5.35 8.04A5.994 5.994 0 0 0 0 14c0 3.31 2.69 6 6 6h13c2.76 0 5-2.24 5-5 0-2.64-2.05-4.78-4.65-4.96zM17 13l-5 5-5-5h3V9h4v4h3z" />
  </Icon>
 );
-export const ToggleIcon = (props: JSX.HTMLAttributes) => (
+export const ToggleIcon = (props: IconProps) => (
  <Icon {...props}>
    <path d="M3 13h2v-2H3v2zm0 4h2v-2H3v2zm2 4v-2H3c0 1.1.89 2 2 2zM3 9h2V7H3v2zm12 12h2v-2h-2v2zm4-18H9c-1.11 0-2 .9-2 2v10c0 1.1.89 2 2 2h10c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2zm0 12H9V5h10v10zm-8 6h2v-2h-2v2zm-4 0h2v-2H7v2z" />
  </Icon>
 );
-export const AddIcon = (props: JSX.HTMLAttributes) => (
+export const AddIcon = (props: IconProps) => (
  <Icon {...props}>
    <path d="M19 13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z"/>
  </Icon>
 );
-export const RemoveIcon = (props: JSX.HTMLAttributes) => (
+export const RemoveIcon = (props: IconProps) => (
  <Icon {...props}>
    <path d="M19 13H5v-2h14v2z"/>
  </Icon>
--- a/src/lib/util.scss
+++ b/src/lib/util.scss
@@ -5,7 +5,6 @@
  width: 100%;
  height: 100%;
  box-sizing: border-box;
  contain: strict;
 }
 .unbutton {
Author	SHA1	Message	Date
Surma	7a08815bcf	Make emscripten with threads compile	2018-11-02 18:34:23 +00:00
Surma	30e78e8ab7	Attempt at threads for webp encoder	2018-11-01 22:36:38 +00:00