Remove openglui embedder code

runtime/embedders/openglui/common/gl.dart

Index: runtime/embedders/openglui/common/gl.dart
diff --git a/runtime/embedders/openglui/common/gl.dart b/runtime/embedders/openglui/common/gl.dart
deleted file mode 100644
index c37c80b3cd47877cf6b072456e7c0e3dcdba82b2..0000000000000000000000000000000000000000
--- a/runtime/embedders/openglui/common/gl.dart
+++ /dev/null
@@ -1,1211 +0,0 @@
-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-library android_extension;
-import 'dart:async';
-
-// A VERY simplified DOM.
-
-class BodyElement {
-  List _nodes;
-  get nodes => _nodes;
-  BodyElement() : _nodes = new List();
-}
-
-// The OpenGLUI "equivalent" of Window.
-
-typedef void RequestAnimationFrameCallback(num highResTime);
-
-class Window {
-  static int _nextId = 0;
-  List _callbacks;
-  List _arguments;
-
-  Window._internal() : _callbacks = [], _arguments = [];
-
-  int _scheduleCallback(callback, [argument]) {
-    _callbacks.add(callback);
-    _arguments.add(argument);
-    return _callbacks.length - 1;
-  }
-
-  int requestAnimationFrame(RequestAnimationFrameCallback callback) {
-    return _scheduleCallback(callback,
-        (new DateTime.now()).millisecondsSinceEpoch);
-  }
-
-  void cancelAnimationFrame(id) {
-    _callbacks[id] = null;
-    _arguments[id] = null;
-  }
-
-  get animationFrame {
-    // TODO(gram)
-    return null;
-  }
-
-  void _dispatch() {
-    // We clear out the callbacks map before calling any callbacks,
-    // as they may schedule new callbacks.
-    var oldcallbacks = _callbacks;
-    var oldarguments = _arguments;
-    _callbacks = [];
-    _arguments = [];
-    for (var i = 0; i < oldcallbacks.length; i++) {
-      if (oldcallbacks[i] != null) {
-        oldcallbacks[i](oldarguments[i]);
-      }
-    }
-    // We could loop around here to handle any callbacks
-    // scheduled in processing the prior ones, but then we
-    // need some other mechanism for trying to get requestAnimationFrame
-    // callbacks at 60fps.
-  }
-
-  Map localStorage = {};  // TODO(gram) - Make this persistent.
-}
-
-Window window = new Window._internal();
-
-// The OpenGLUI "equivalent" of HtmlDocument.
-class Document extends Node {
-  BodyElement _body;
-  get body => _body;
-  Document._internal() : _body = new BodyElement();
-}
-
-Document document = new Document._internal();
-
-// TODO(gram): make private and call from within library context.
-update_() {
-  log("in update");
-  window._dispatch();
-}
-
-// Event handling. This is very kludgy for now, especially the
-// bare-bones Stream stuff!
-
-typedef void EventListener(Event event);
-
-class EventTarget {
-  static Map<EventTarget, Map<String, List<EventListener>>>
-      _listeners = new Map();
-
-  static get listeners => _listeners;
-
-  bool dispatchEvent(Event event) {
-    var rtn = false;
-    if (!_listeners.containsKey(this)) return false;
-    var listeners = _listeners[this];
-    if (!listeners.containsKey(event.type)) return false;
-    var eventListeners = listeners[event.type];
-    for (var eventListener in eventListeners) {
-      if (eventListener != null) {
-        eventListener(event);
-        rtn = true;
-      }
-    }
-    return rtn;
-  }
-
-  void addListener(String eventType, EventListener handler) {
-    if (!_listeners.containsKey(this)) {
-      _listeners[this] = new Map();
-    }
-    var listeners = _listeners[this];
-    if (!listeners.containsKey(eventType)) {
-      listeners[eventType] = new List();
-    }
-    var event_listeners = listeners[eventType];
-    for (var i = 0; i < event_listeners.length; i++) {
-      if (event_listeners[i] == null) {
-        event_listeners[i] = handler;
-        return;
-      }
-    }
-    event_listeners.add(handler);
-  }
-
-  void removeListener(String eventType, EventListener handler) {
-    if (_listeners.containsKey(this)) {
-      var listeners = _listeners[this];
-      if (listeners.containsKey(eventType)) {
-        var event_listeners = listeners[eventType];
-        for (var i = 0; i < event_listeners.length; i++) {
-          if (event_listeners[i] == handler) {
-            event_listeners[i] = null;
-            break;
-          }
-        }
-      }
-    }
-  }
-}
-
-class Event {
-  final String type;
-  EventTarget target;
-  Event(String type) : this.type = type;
-  preventDefault() {}
-  stopPropagation() {}
-}
-
-class KeyboardEvent extends Event {
-  final bool altKey;
-  final bool ctrlKey;
-  final bool shiftKey;
-  final int keyCode;
-
-  KeyboardEvent(String type, int keycode, bool alt, bool ctrl, bool shift) 
-    : super(type),
-      keyCode = keycode,
-      altKey = alt,
-      ctrlKey = ctrl,
-      shiftKey = shift {
-  }
-}
-
-class MouseEvent extends Event {
-  final int screenX, screenY;
-  final int clientX, clientY;
-
-  MouseEvent(String type, int x, int y)
-    : super(type),
-      screenX = x,
-      screenY = y,
-      clientX = x,
-      clientY = y {
-  }
-}
-
-class _EventStreamSubscription<T extends Event> extends StreamSubscription<T> {
-  int _pauseCount = 0;
-  EventTarget _target;
-  final String _eventType;
-  var _onData;
-
-  _EventStreamSubscription(this._target, this._eventType, this._onData) {
-    _tryResume();
-  }
-
-  void cancel() {
-    if (_canceled) {
-      throw new StateError("Subscription has been canceled.");
-    }
-
-    _unlisten();
-    // Clear out the target to indicate this is complete.
-    _target = null;
-    _onData = null;
-  }
-
-  bool get _canceled => _target == null;
-
-  void onData(void handleData(T event)) {
-    if (_canceled) {
-      throw new StateError("Subscription has been canceled.");
-    }
-    // Remove current event listener.
-    _unlisten();
-
-    _onData = handleData
-    _tryResume();
-  }
-
-  /// Has no effect.
-  void onError(void handleError(Object error)) {}
-
-  /// Has no effect.
-  void onDone(void handleDone()) {}
-
-  void pause([Future resumeSignal]) {
-    if (_canceled) {
-      throw new StateError("Subscription has been canceled.");
-    }
-    ++_pauseCount;
-    _unlisten();
-
-    if (resumeSignal != null) {
-      resumeSignal.whenComplete(resume);
-    }
-  }
-
-  bool get _paused => _pauseCount > 0;
-
-  void resume() {
-    if (_canceled) {
-      throw new StateError("Subscription has been canceled.");
-    }
-    if (!_paused) {
-      throw new StateError("Subscription is not paused.");
-    }
-    --_pauseCount;
-    _tryResume();
-  }
-
-  void _tryResume() {
-    if (_onData != null && !_paused) {
-      _target.addListener(_eventType, _onData);
-    }
-  }
-
-  void _unlisten() {
-    if (_onData != null) {
-      _target.removeListener(_eventType, _onData);
-    }
-  }
-
-  Future asFuture([var futureValue]) {
-    // We just need a future that will never succeed or fail.
-    Completer completer = new Completer();
-    return completer.future;
-  }
-}
-
-class _EventStream<T extends Event> extends Stream<T> {
-  final Object _target;
-  final String _eventType;
-
-  _EventStream(this._target, this._eventType);
-
-  // DOM events are inherently multi-subscribers.
-  Stream<T> asBroadcastStream() => this;
-  bool get isBroadcast => true;
-
-  StreamSubscription<T> listen(void onData(T event),
-      { void onError(Object error),
-      void onDone(),
-      bool cancelOnError}) {
-
-    return new _EventStreamSubscription<T>(
-        this._target, this._eventType, onData);
-  }
-}
-
-class Node extends EventTarget {
-  Stream<KeyboardEvent> get onKeyDown => new _EventStream(this, 'keydown');
-  Stream<KeyboardEvent> get onKeyUp => new _EventStream(this, 'keyup');
-  Stream<MouseEvent> get onMouseDown => new _EventStream(this, 'mousedown');
-  Stream<MouseEvent> get onMouseMove => new _EventStream(this, 'mousemove');
-  Stream<MouseEvent> get onMouseUp => new _EventStream(this, 'mouseup');
-}
-
-// TODO(gram): If we support more than one on-screen canvas, we will
-// need to filter dispatched mouse and key events by the target Node
-// with more granularity; right now we just iterate through DOM nodes
-// until we find one that handles the event.
-_dispatchEvent(Event event) {
-  assert(document.body.nodes.length <= 1);
-  for (var target in document.body.nodes) {
-    event.target = target;
-    if (target.dispatchEvent(event)) {
-      return;
-    }
-  }
-  document.dispatchEvent(event);
-}
-
-_dispatchKeyEvent(String type, int keyCode, bool alt, bool ctrl, bool shift) {
-  _dispatchEvent(new KeyboardEvent(type, keyCode, alt, ctrl, shift));
-}
-
-_dispatchMouseEvent(String type, double x, double y) {
-  _dispatchEvent(new MouseEvent(type, x.toInt(), y.toInt()));
-}
-
-// These next few are called by vmglue.cc.
-onKeyDown_(int when, int keyCode, bool alt, bool ctrl, bool shift, int repeat)
-    =>  _dispatchKeyEvent('keydown', keyCode, alt, ctrl, shift);
-
-onKeyUp_(int when, int keyCode, bool alt, bool ctrl, bool shift, int repeat) =>
-    _dispatchKeyEvent('keyup', keyCode, alt, ctrl, shift);
-
-onMouseDown_(int when, double x, double y) =>
-    _dispatchMouseEvent('mousedown', x, y);
-
-onMouseMove_(int when, double x, double y) =>
-    _dispatchMouseEvent('mousemove', x, y);
-
-onMouseUp_(int when, double x, double y) =>
-    _dispatchMouseEvent('mouseup', x, y);
-
-class CanvasElement extends Node {
-  int height;
-  int width;
-
-  CanvasRenderingContext2D _context2d;
-  WebGLRenderingContext _context3d;
-
-  // For use with drawImage, we want to support a src property
-  // like ImageElement, which maps to the context handle in native
-  // code.
-  get src => "context2d://${_context2d.handle}";
-
-  CanvasElement({int width, int height})
-    : super() {
-    this.width = (width == null) ? getDeviceScreenWidth() : width;
-    this.height = (height == null) ? getDeviceScreenHeight() : height;
-    getContext('2d');
-  }
-
-  CanvasRenderingContext getContext(String contextId) {
-    if (contextId == "2d") {
-      if (_context2d == null) {
-        _context2d = new CanvasRenderingContext2D(this, width, height);
-      }
-      return _context2d;
-    } else if (contextId == "webgl" || 
-               contextId == "experimental-webgl") {
-      if (_context3d == null) {
-        _context3d = new WebGLRenderingContext(this);
-      }
-      return _context3d;
-    }
-  }
- 
-  String toDataUrl(String type) {
-    // This needs to take the contents of the underlying
-    // canvas painted by the 2d context, give that a unique
-    // URL, and return that. The canvas element should be
-    // reuable afterwards without destroying the previously
-    // rendered data associated with this URL.
-    assert(_context2d != null);
-    var rtn = src;
-    _context2d = null;
-    return rtn;
-  }
-}
-
-class CanvasRenderingContext {
-  final CanvasElement canvas;
-
-  CanvasRenderingContext(this.canvas);
-}
-
-class AudioElement {
-  double volume;
-  String _src;
-  get src => _src;
-  set src(String v) {
-    _src = v;
-    _loadSample(v);
-  }
-
-  AudioElement([this._src]);
-  void play() {
-    _playSample(_src);
-  }
-}
-
-// The simplest way to call native code: top-level functions.
-int systemRand() native "SystemRand";
-void systemSrand(int seed) native "SystemSrand";
-void log(String what) native "Log";
-
-int getDeviceScreenWidth() native "GetDeviceScreenWidth";
-int getDeviceScreenHeight() native "GetDeviceScreenHeight";
-
-// EGL functions.
-void glSwapBuffers() native "SwapBuffers";
-
-// GL functions.
-void glAttachShader(int program, int shader) native "GLAttachShader";
-void glBindBuffer(int target, int buffer) native "GLBindBuffer";
-void glBufferData(int target, List data, int usage) native "GLBufferData";
-void glClearColor(num r, num g, num b, num alpha) native "GLClearColor";
-void glClearDepth(num depth) native "GLClearDepth";
-void glClear(int mask) native "GLClear";
-void glCompileShader(int shader) native "GLCompileShader";
-int glCreateBuffer() native "GLCreateBuffer";
-int glCreateProgram() native "GLCreateProgram";
-int glCreateShader(int shaderType) native "GLCreateShader";
-void glDrawArrays(int mode, int first, int count) native "GLDrawArrays";
-void glEnableVertexAttribArray(int index) native "GLEnableVertexAttribArray";
-int glGetAttribLocation(int program, String name) native "GLGetAttribLocation";
-int glGetError() native "GLGetError";
-int glGetProgramParameter(int program, int param)
-    native "GLGetProgramParameter";
-int glGetShaderParameter(int shader, int param) native "GLGetShaderParameter";
-int glGetUniformLocation(int program, String name)
-    native "GLGetUniformLocation";
-void glLinkProgram(int program) native "GLLinkProgram";
-void glShaderSource(int shader, String source) native "GLShaderSource";
-void glUniform1f(int location, double v0) native "GLUniform1f";
-void glUniform2f(int location, double v0, double v1) native "GLUniform2f";
-void glUniform3f(int location, double v0, double v1, double v2)
-    native "GLUniform3f";
-void glUniform4f(int location, double v0, double v1, double v2, double v3)
-    native "GLUniform4f";
-void glUniform1i(int location, int v0) native "GLUniform1i";
-void glUniform2i(int location, int v0, int v1) native "GLUniform2i";
-void glUniform3i(int location, int v0, int v1, int v2) native "GLUniform3i";
-void glUniform4i(int location, int v0, int v1, int v2, int v3)
-    native "GLUniform4i";
-void glUniform1fv(int location, List values) native "GLUniform1fv";
-void glUniform2fv(int location, List values) native "GLUniform2fv";
-void glUniform3fv(int location, List values) native "GLUniform3fv";
-void glUniform4fv(int location, List values) native "GLUniform4fv";
-void glUniform1iv(int location, List values) native "GLUniform1iv";
-void glUniform2iv(int location, List values) native "GLUniform2iv";
-void glUniform3iv(int location, List values) native "GLUniform3iv";
-void glUniform4iv(int location, List values) native "GLUniform4iv";
-void glUseProgram(int program) native "GLUseProgram";
-void glVertexAttribPointer(int index, int size, int type, bool normalized,
-    int stride, int pointer) native "GLVertexAttribPointer";
-void glViewport(int x, int y, int width, int height) native "GLViewport";
-
-int glArrayBuffer() native "GLArrayBuffer";
-int glColorBufferBit() native "GLColorBufferBit";
-int glCompileStatus() native "GLCompileStatus";
-int glDeleteStatus() native "GLDeleteStatus";
-int glDepthBufferBit() native "GLDepthBufferBit";
-int glFloat() native "GLFloat";
-int glFragmentShader() native "GLFragmentShader";
-int glLinkStatus() native "GLLinkStatus";
-int glStaticDraw() native "GLStaticDraw";
-int glTriangleStrip() native "GLTriangleStrip";
-int glTriangles() native "GLTriangles";
-int glTrue() native "GLTrue";
-int glValidateStatus() native "GLValidateStatus";
-int glVertexShader() native "GLVertexShader";
-
-String glGetShaderInfoLog(int shader) native "GLGetShaderInfoLog";
-String glGetProgramInfoLog(int program) native "GLGetProgramInfoLog";
-
-class WebGLRenderingContext extends CanvasRenderingContext {
-  WebGLRenderingContext(canvas) : super(canvas);
-
-  static get ARRAY_BUFFER => glArrayBuffer();
-  static get COLOR_BUFFER_BIT => glColorBufferBit();
-  static get COMPILE_STATUS => glCompileStatus();
-  static get DELETE_STATUS => glDeleteStatus();
-  static get DEPTH_BUFFER_BIT => glDepthBufferBit();
-  static get FLOAT => glFloat();
-  static get FRAGMENT_SHADER => glFragmentShader();
-  static get LINK_STATUS => glLinkStatus();
-  static get STATIC_DRAW => glStaticDraw();
-  static get TRUE => glTrue();
-  static get TRIANGLE_STRIP => glTriangleStrip();
-  static get TRIANGLES => glTriangles();
-  static get VALIDATE_STATUS => glValidateStatus();
-  static get VERTEX_SHADER => glVertexShader();
-
-  attachShader(program, shader) => glAttachShader(program, shader);
-  bindBuffer(target, buffer) => glBindBuffer(target, buffer);
-  bufferData(target, data, usage) => glBufferData(target, data, usage);
-  clearColor(r, g, b, alpha) => glClearColor(r, g, b, alpha);
-  clearDepth(depth) => glClearDepth(depth);
-  clear(mask) => glClear(mask);
-  compileShader(shader) => glCompileShader(shader);
-  createBuffer() => glCreateBuffer();
-  createProgram() => glCreateProgram();
-  createShader(shaderType) => glCreateShader(shaderType);
-  drawArrays(mode, first, count) => glDrawArrays(mode, first, count);
-  enableVertexAttribArray(index) => glEnableVertexAttribArray(index);
-  getAttribLocation(program, name) => glGetAttribLocation(program, name);
-  getError() => glGetError();
-  getProgramParameter(program, name) {
-    var rtn = glGetProgramParameter(program, name);
-    if (name == DELETE_STATUS ||
-        name == LINK_STATUS ||
-        name == VALIDATE_STATUS) {
-      return (rtn == 0) ? false : true;
-    }
-    return rtn;
-  }
-  getShaderParameter(shader, name) {
-    var rtn = glGetShaderParameter(shader, name);
-    if (name == DELETE_STATUS || name == COMPILE_STATUS) {
-      return (rtn == 0) ? false : true;
-    }
-    return rtn;
-  }
-  getUniformLocation(program, name) => glGetUniformLocation(program, name);
-  linkProgram(program) => glLinkProgram(program);
-  shaderSource(shader, source) => glShaderSource(shader, source);
-  uniform1f(location, v0) => glUniform1f(location, v0);
-  uniform2f(location, v0, v1) => glUniform2f(location, v0, v1);
-  uniform3f(location, v0, v1, v2) => glUniform3f(location, v0, v1, v2);
-  uniform4f(location, v0, v1, v2, v3) => glUniform4f(location, v0, v1, v2, v3);
-  uniform1i(location, v0) => glUniform1i(location, v0);
-  uniform2i(location, v0, v1) => glUniform2i(location, v0, v1);
-  uniform3i(location, v0, v1, v2) => glUniform3i(location, v0, v1, v2);
-  uniform4i(location, v0, v1, v2, v3) => glUniform4i(location, v0, v1, v2, v3);
-  uniform1fv(location, values) => glUniform1fv(location, values);
-  uniform2fv(location, values) => glUniform2fv(location, values);
-  uniform3fv(location, values) => glUniform3fv(location, values);
-  uniform4fv(location, values) => glUniform4fv(location, values);
-  uniform1iv(location, values) => glUniform1iv(location, values);
-  uniform2iv(location, values) => glUniform2iv(location, values);
-  uniform3iv(location, values) => glUniform3iv(location, values);
-  uniform4iv(location, values) => glUniform4iv(location, values);
-  useProgram(program) => glUseProgram(program);
-  vertexAttribPointer(index, size, type, normalized, stride, pointer) =>
-    glVertexAttribPointer(index, size, type, normalized, stride, pointer);
-  viewport(x, y, width, height) => glViewport(x, y, width, height);
-  getShaderInfoLog(shader) => glGetShaderInfoLog(shader);
-  getProgramInfoLog(program) => glGetProgramInfoLog(program);
-
-  // TODO(vsm): Kill.
-  noSuchMethod(invocation) {
-      throw new Exception('Unimplemented ${invocation.memberName}');
-  }
-}
-
-//------------------------------------------------------------------
-// Simple audio support.
-
-void playBackground(String path) native "PlayBackground";
-void stopBackground() native "StopBackground";
-
-//-------------------------------------------------------------------
-// Set up print().
-
-get _printClosure => (s) {
-  try {
-    log(s);
-  } catch (_) {
-    throw(s);
-  }
-};
-
-//------------------------------------------------------------------
-// Temp hack for compat with WebGL.
-
-class Float32Array extends List<double> {
-  Float32Array.fromList(List a) {
-    addAll(a);
-  }
-}
-
-//------------------------------------------------------------------
-// 2D canvas support
-
-int _SetWidth(int handle, int width)
-    native "C2DSetWidth";
-int _SetHeight(int handle, int height)
-    native "C2DSetHeight";
-
-double _SetGlobalAlpha(int handle, double globalAlpha)
-    native "C2DSetGlobalAlpha";
-void _SetFillStyle(int handle, fs)
-    native "C2DSetFillStyle";
-String _SetFont(int handle, String font)
-    native "C2DSetFont";
-void _SetGlobalCompositeOperation(int handle, String op)
-    native "C2DSetGlobalCompositeOperation";
-_SetLineCap(int handle, String lc)
-    native "C2DSetLineCap";
-_SetLineJoin(int handle, String lj)
-    native "C2DSetLineJoin";
-_SetLineWidth(int handle, double w)
-    native "C2DSetLineWidth";
-_SetMiterLimit(int handle, double limit)
-    native "C2DSetMiterLimit";
-_SetShadowBlur(int handle, double blur)
-    native "C2DSetShadowBlur";
-_SetShadowColor(int handle, String color)
-    native "C2DSetShadowColor";
-_SetShadowOffsetX(int handle, double offset)
-    native "C2DSetShadowOffsetX";
-_SetShadowOffsetY(int handle, double offset)
-    native "C2DSetShadowOffsetY";
-void _SetStrokeStyle(int handle, ss)
-    native "C2DSetStrokeStyle";
-String _SetTextAlign(int handle, String align)
-    native "C2DSetTextAlign";
-String _SetTextBaseline(int handle, String baseline)
-    native "C2DSetTextBaseline";
-_GetBackingStorePixelRatio(int handle)
-    native "C2DGetBackingStorePixelRatio";
-void _SetImageSmoothingEnabled(int handle, bool ise)
-    native "C2DSetImageSmoothingEnabled";    
-void _SetLineDash(int handle, List v)
-    native "C2DSetLineDash";
-_SetLineDashOffset(int handle, int v)
-    native "C2DSetLineDashOffset";
-void _Arc(int handle, double x, double y, double radius,
-    double startAngle, double endAngle, [bool anticlockwise = false])
-    native "C2DArc";
-void _ArcTo(int handle, double x1, double y1,
-              double x2, double y2, double radius)
-    native "C2DArcTo"; 
-void _ArcTo2(int handle, double x1, double y1,
-               double x2, double y2, double radiusX,
-    double radiusY, double rotation)
-    native "C2DArcTo2"; 
-void _BeginPath(int handle)
-    native "C2DBeginPath";
-void _BezierCurveTo(int handle, double cp1x, double cp1y,
-                      double cp2x, double cp2y, double x, double y)
-    native "C2DBezierCurveTo";
-void _ClearRect(int handle, double x, double y, double w, double h)
-    native "C2DClearRect";
-void _Clip(int handle)
-    native "C2DClip";
-void _ClosePath(int handle)
-    native "C2DClosePath";
-ImageData _CreateImageDataFromDimensions(int handle, num w, num h)
-    native "C2DCreateImageDataFromDimensions";
-void _DrawImage(int handle, String src_url,
-                  int sx, int sy,
-                  bool has_src_dimensions, int sw, int sh,
-                  int dx, int dy,
-                  bool has_dst_dimensions, int dw, int dh)
-    native "C2DDrawImage";
-void _Fill(int handle)
-    native "C2DFill";
-void _FillRect(int handle, double x, double y, double w, double h)
-    native "C2DFillRect";
-void _FillText(int handle, String text, double x, double y, double maxWidth)
-    native "C2DFillText";
-ImageData _GetImageData(num sx, num sy, num sw, num sh)
-    native "C2DGetImageData";    
-void _LineTo(int handle, double x, double y)
-    native "C2DLineTo";
-double _MeasureText(int handle, String text)
-    native "C2DMeasureText";
-void _MoveTo(int handle, double x, double y)
-    native "C2DMoveTo";
-void _PutImageData(int handle, ImageData imagedata, double dx, double dy)
-    native "C2DPutImageData";    
-void _QuadraticCurveTo(int handle, double cpx, double cpy,
-    double x, double y)
-        native "C2DQuadraticCurveTo";
-void _Rect(int handle, double x, double y, double w, double h)
-    native "C2DRect";
-void _Restore(int handle)
-    native "C2DRestore";
-void _Rotate(int handle, double a)
-    native "C2DRotate";
-void _Save(int handle)
-    native "C2DSave";
-void _Scale(int handle, double sx, double sy)
-    native "C2DScale";
-void _SetTransform(int handle, double m11, double m12,
-                     double m21, double m22, double dx, double dy)
-    native "C2DSetTransform";
-void _Stroke(int handle)
-    native "C2DStroke";
-void _StrokeRect(int handle, double x, double y, double w, double h)
-    native "C2DStrokeRect";    
-void _StrokeText(int handle, String text, double x, double y,
-    double maxWidth)
-        native "C2DStrokeText";
-void _Transform(int handle, double m11, double m12,
-                  double m21, double m22, double dx, double dy)
-    native "C2DTransform";
-void _Translate(int handle, double x, double y)
-    native "C2DTranslate";
-
-void _CreateNativeContext(int handle, int width, int height)
-    native "C2DCreateNativeContext";
-
-void _SetFillGradient(int handle, bool isRadial,
-        double x0, double y0, double r0,
-        double x1, double y1, double r1,
-        List<double> positions, List<String> colors)
-    native "C2DSetFillGradient";
-
-void _SetStrokeGradient(int handle, bool isRadial,
-        double x0, double y0, double r0,
-        double x1, double y1, double r1,
-        List<double> positions, List<String> colors)
-    native "C2DSetStrokeGradient";
-
-int _GetImageWidth(String url)
-    native "C2DGetImageWidth";
-
-int _GetImageHeight(String url)
-    native "C2DGetImageHeight";
-
-class CanvasGradient {
-  num _x0, _y0, _r0 = 0, _x1, _y1, _r1 = 0;
-  bool _isRadial;
-  List<double> _colorStopPositions = [];
-  List<String> _colorStopColors = [];
-
-  void addColorStop(num offset, String color) {
-    _colorStopPositions.add(offset.toDouble());
-    _colorStopColors.add(color);
-  }
-
-  CanvasGradient.linear(this._x0, this._y0, this._x1, this._y1)
-      : _isRadial = false;
-  
-  CanvasGradient.radial(this._x0, this._y0, this._r0,
-                        this._x1, this._y1, this._r1)
-      : _isRadial = true;
-
-  void setAsFillStyle(_handle) {
-    _SetFillGradient(_handle, _isRadial,
-        _x0.toDouble(), _y0.toDouble(), _r0.toDouble(),
-        _x1.toDouble(), _y1.toDouble(), _r1.toDouble(),
-        _colorStopPositions, _colorStopColors);
-  }
-
-  void setAsStrokeStyle(_handle) {
-    _SetStrokeGradient(_handle, _isRadial,
-        _x0.toDouble(), _y0.toDouble(), _r0.toDouble(),
-        _x1.toDouble(), _y1.toDouble(), _r1.toDouble(),
-        _colorStopPositions, _colorStopColors);
-  }
-}
-
-class ImageElement extends Node {
-  Stream<Event> get onLoad => new _EventStream(this, 'load');
-
-  String _src;
-  int _width;
-  int _height;
-
-  get src => _src;
-
-  set src(String v) {
-    log("Set ImageElement src to $v");
-    _src = v;
-  }
-
-  // The onLoad handler may be set after the src, so
-  // we hook into that here...
-  void addListener(String eventType, EventListener handler) {
-    super.addListener(eventType, handler);
-    if (eventType == 'load') {
-      var e = new Event('load');
-      e.target = this;
-      window._scheduleCallback(handler, e);
-    }
-  }
-
-  get width => _width == null ? _width = _GetImageWidth(_src) : _width;
-  get height => _height == null ? _height = _GetImageHeight(_src) : _height;
-  set width(int widthp) => _width = widthp;
-  set height(int heightp) => _height = heightp;
-
-  ImageElement({String srcp, int widthp, int heightp})
-    : _src = srcp,
-      _width = widthp,
-      _height = heightp {
-    if (_src != null) {
-      if (_width == null) _width = _GetImageWidth(_src);
-      if (_height == null) _height = _GetImageHeight(_src);
-    }
-  }
-}
-
-class ImageData {
-  final Uint8ClampedArray data;
-  final int height;
-  final int width;
-  ImageData(this.height, this.width, this.data);
-}
-
-class TextMetrics {
-  final num width;
-  TextMetrics(this.width);
-}
-
-void shutdown() {
-  CanvasRenderingContext2D.next_handle = 0;
-}
-
-class Rect {
-  final num top, left, width, height;
-  const Rect(this.left, this.top, this.width, this.height);
-}
-
-class CanvasRenderingContext2D extends CanvasRenderingContext {
-  // TODO(gram): We need to support multiple contexts, for cached content
-  // prerendered to an offscreen buffer. For this we will use handles, with
-  // handle 0 being the physical display.
-  static int next_handle = 0;
-  int _handle = 0;
-  get handle => _handle;
-
-  int _width, _height;
-  set width(int w) { _width = SetWidth(_handle, w); }
-  get width => _width;
-  set height(int h) { _height = SetHeight(_handle, h); }
-  get height => _height;
-
-  CanvasRenderingContext2D(canvas, width, height) : super(canvas) {
-    _width = width;
-    _height = height;
-    _CreateNativeContext(_handle = next_handle++, width, height);
-  }
-
-  double _alpha = 1.0;
-  set globalAlpha(num a) {
-    _alpha = _SetGlobalAlpha(_handle, a.toDouble());
-  }
-  get globalAlpha => _alpha;
-
-  // TODO(gram): make sure we support compound assignments like:
-  // fillStyle = strokeStyle = "red"
-  var _fillStyle = "#000";
-  set fillStyle(fs) {
-    _fillStyle = fs;
-    // TODO(gram): Support for CanvasPattern.
-    if (fs is CanvasGradient) {
-      fs.setAsFillStyle(_handle);
-    } else {
-      _SetFillStyle(_handle, fs);
-    }
-  }
-  get fillStyle => _fillStyle;
-
-  String _font = "10px sans-serif";
-  set font(String f) { _font = _SetFont(_handle, f); }
-  get font => _font;
-
-  String _globalCompositeOperation = "source-over";
-  set globalCompositeOperation(String o) =>
-      _SetGlobalCompositeOperation(_handle, _globalCompositeOperation = o);
-  get globalCompositeOperation => _globalCompositeOperation;
-
-  String _lineCap = "butt"; // "butt", "round", "square"
-  get lineCap => _lineCap;
-  set lineCap(String lc) => _SetLineCap(_handle, _lineCap = lc);
-
-  int _lineDashOffset = 0;
-  get lineDashOffset => _lineDashOffset;
-  set lineDashOffset(num v) {
-    _lineDashOffset = v.toInt();
-    _SetLineDashOffset(_handle, _lineDashOffset);
-  }
-
-  String _lineJoin = "miter"; // "round", "bevel", "miter"
-  get lineJoin => _lineJoin;
-  set lineJoin(String lj) =>  _SetLineJoin(_handle, _lineJoin = lj);
-
-  num _lineWidth = 1.0;
-  get lineWidth => _lineWidth;
-  set lineWidth(num w) {
-    _SetLineWidth(_handle, w.toDouble());
-    _lineWidth = w;
-  }
-
-  num _miterLimit = 10.0; // (default 10)
-  get miterLimit => _miterLimit;
-  set miterLimit(num limit) {
-    _SetMiterLimit(_handle, limit.toDouble());
-    _miterLimit = limit;
-  }
-
-  num _shadowBlur;
-  get shadowBlur =>  _shadowBlur;
-  set shadowBlur(num blur) {
-    _shadowBlur = blur;
-    _SetShadowBlur(_handle, blur.toDouble());
-  }
-
-  String _shadowColor;
-  get shadowColor => _shadowColor;
-  set shadowColor(String color) =>
-      _SetShadowColor(_handle, _shadowColor = color);
-  
-  num _shadowOffsetX;
-  get shadowOffsetX => _shadowOffsetX;
-  set shadowOffsetX(num offset) {
-    _shadowOffsetX = offset;
-    _SetShadowOffsetX(_handle, offset.toDouble());
-  }
-
-  num _shadowOffsetY;
-  get shadowOffsetY => _shadowOffsetY;
-  set shadowOffsetY(num offset) {
-    _shadowOffsetY = offset;
-    _SetShadowOffsetY(_handle, offset.toDouble());
-  }
-
-  var _strokeStyle = "#000";
-  get strokeStyle => _strokeStyle;
-  set strokeStyle(ss) {
-    _strokeStyle = ss;
-    // TODO(gram): Support for CanvasPattern.
-    if (ss is CanvasGradient) {
-      ss.setAsStrokeStyle(_handle);
-    } else {
-      _SetStrokeStyle(_handle, ss);
-    }
-  }
-
-  String _textAlign = "start";
-  get textAlign => _textAlign;
-  set textAlign(String a) { _textAlign = _SetTextAlign(_handle, a); }
-
-  String _textBaseline = "alphabetic";
-  get textBaseline => _textBaseline;
-  set textBaseline(String b) { _textBaseline = _SetTextBaseline(_handle, b); }
-
-  get webkitBackingStorePixelRatio => _GetBackingStorePixelRatio(_handle);
-
-  bool _webkitImageSmoothingEnabled;
-  get webkitImageSmoothingEnabled => _webkitImageSmoothingEnabled;
-  set webkitImageSmoothingEnabled(bool v) =>
-     _SetImageSmoothingEnabled(_webkitImageSmoothingEnabled = v);
-
-  get webkitLineDash => lineDash;
-  set webkitLineDash(List v) => lineDash = v;
-
-  get webkitLineDashOffset => lineDashOffset;
-  set webkitLineDashOffset(num v) => lineDashOffset = v;
-
-  // Methods
-
-  void arc(num x, num y, num radius, num a1, num a2, bool anticlockwise) {
-    if (radius < 0) {
-      // throw IndexSizeError
-    } else {
-      _Arc(_handle, x.toDouble(), y.toDouble(), radius.toDouble(),
-          a1.toDouble(), a2.toDouble(), anticlockwise);
-    }
-  }
-
-  // Note - looking at the Dart docs it seems Dart doesn't support
-  // the second form in the browser.
-  void arcTo(num x1, num y1, num x2, num y2,
-    num radiusX, [num radiusY, num rotation]) {
-    if (radiusY == null) {
-      _ArcTo(_handle, x1.toDouble(), y1.toDouble(),
-                        x2.toDouble(), y2.toDouble(), radiusX.toDouble());
-    } else {
-      _ArcTo2(_handle, x1.toDouble(), y1.toDouble(),
-                         x2.toDouble(), y2.toDouble(),
-                         radiusX.toDouble(), radiusY.toDouble(),
-                         rotation.toDouble());
-    }
-  }
-
-  void beginPath() => _BeginPath(_handle);
-
-  void bezierCurveTo(num cp1x, num cp1y, num cp2x, num cp2y,
-    num x, num y) =>
-    _BezierCurveTo(_handle, cp1x.toDouble(), cp1y.toDouble(),
-                              cp2x.toDouble(), cp2y.toDouble(),
-                              x.toDouble(), y.toDouble());
-
-  void clearRect(num x, num y, num w, num h) =>
-    _ClearRect(_handle, x.toDouble(), y.toDouble(),
-        w.toDouble(), h.toDouble());
-
-  void clip() => _Clip(_handle);
-
-  void closePath() => _ClosePath(_handle);
-
-  ImageData createImageData(var imagedata_OR_sw, [num sh = null]) {
-    if (sh == null) {
-      throw new Exception('Unimplemented createImageData(imagedata)');
-    } else {
-      return _CreateImageDataFromDimensions(_handle, imagedata_OR_sw, sh);
-    }
-  }
-
-  CanvasGradient createLinearGradient(num x0, num y0, num x1, num y1) {
-    return new CanvasGradient.linear(x0, y0, x1, y1);
-  }
-
-  CanvasPattern createPattern(canvas_OR_image, String repetitionType) {
-    throw new Exception('Unimplemented createPattern');
-  }
-
-  CanvasGradient createRadialGradient(num x0, num y0, num r0,
-                                      num x1, num y1, num r1) {
-    return new CanvasGradient.radial(x0, y0, r0, x1, y1, r1);
-  }
-
-  void _drawImage(element, num x1, num y1,
-                [num w1, num h1, num x2, num y2, num w2, num h2]) {
-    if (element == null || element.src == null || element.src.length == 0) {
-      throw "drawImage called with no valid src";
-    } else {
-      log("drawImage ${element.src}");
-    }
-    var w = (element.width == null) ? 0 : element.width;
-    var h = (element.height == null) ?  0 : element.height;
-    if (!?w1) { // drawImage(element, dx, dy)
-      _DrawImage(_handle, element.src, 0, 0, false, w, h,
-                   x1.toInt(), y1.toInt(), false, 0, 0);
-    } else if (!?x2) {  // drawImage(element, dx, dy, dw, dh)
-      _DrawImage(_handle, element.src, 0, 0, false, w, h,
-                   x1.toInt(), y1.toInt(), true, w1.toInt(), h1.toInt());
-    } else {  // drawImage(image, sx, sy, sw, sh, dx, dy, dw, dh)
-      _DrawImage(_handle, element.src, 
-                   x1.toInt(), y1.toInt(), true, w1.toInt(), h1.toInt(),
-                   x2.toInt(), y2.toInt(), true, w2.toInt(), h2.toInt());
-    }
-  }
-
-  void drawImage(source, num destX, num destY) {
-    _drawImage(source, destX, destY);
-  }
-
-  void drawImageScaled(source,
-      num destX, num destY, num destWidth, num destHeight) {
-    _drawImage(source, destX,  destY, destWidth, destHeight);
-  }
-
-  void drawImageScaledFromSource(source,
-      num sourceX, num sourceY, num sourceWidth, num sourceHeight,
-      num destX, num destY, num destWidth, num destHeight) {
-    _drawImage(source, sourceX, sourceY, sourceWidth, sourceHeight,
-        destX, destY, destWidth, destHeight);
-  }
-
-  void drawImageToRect(source, Rect dest, {Rect sourceRect}) {
-    if (sourceRect == null) {
-      _drawImage(source, dest.left, dest.top, dest.width, dest.height);
-    } else {
-      _drawImage(source,
-         sourceRect.left, sourceRect.top, sourceRect.width, sourceRect.height,
-         dest.left, dest.top, dest.width, dest.height);
-    }
-  }
-
-  void fill() => _Fill(_handle);
-
-  void fillRect(num x, num y, num w, num h) =>
-    _FillRect(_handle, x.toDouble(), y.toDouble(),
-                         w.toDouble(), h.toDouble());
-
-  void fillText(String text, num x, num y, [num maxWidth = -1]) =>
-    _FillText(_handle, text, x.toDouble(), y.toDouble(),
-                                 maxWidth.toDouble());
-
-  ImageData getImageData(num sx, num sy, num sw, num sh) =>
-    _GetImageData(sx, sy, sw, sh);
-
-  List<double> _lineDash = null;
-  List<num> getLineDash() {
-    if (_lineDash == null) return [];
-    return _lineDash;  // TODO(gram): should we return a copy?
-  }
-
-  bool isPointInPath(num x, num y) {
-    throw new Exception('Unimplemented isPointInPath');
-  }
-
-  void lineTo(num x, num y) {
-    _LineTo(_handle, x.toDouble(), y.toDouble());
-  }
-
-  TextMetrics measureText(String text) {
-    double w = _MeasureText(_handle, text);
-    return new TextMetrics(w);
-  }
-
-  void moveTo(num x, num y) =>
-    _MoveTo(_handle, x.toDouble(), y.toDouble());
-
-  void putImageData(ImageData imagedata, num dx, num dy,
-                   [num dirtyX, num dirtyY, num dirtyWidth, num dirtyHeight]) {
-    if (dirtyX != null || dirtyY != null) {
-      throw new Exception('Unimplemented putImageData');
-    } else {
-      _PutImageData(_handle, imagedata, dx, dy);
-    }
-  }
-
-  void quadraticCurveTo(num cpx, num cpy, num x, num y) =>
-    _QuadraticCurveTo(_handle, cpx.toDouble(), cpy.toDouble(),
-                        x.toDouble(), y.toDouble());
-
-  void rect(num x, num y, num w, num h) =>
-    _Rect(_handle, x.toDouble(), y.toDouble(), w.toDouble(), h.toDouble());
-
-  void restore() => _Restore(_handle);
-
-  void rotate(num angle) => _Rotate(_handle, angle.toDouble());
-
-  void save() => _Save(_handle);
-
-  void scale(num x, num y) => _Scale(_handle, x.toDouble(), y.toDouble());
-
-  void setFillColorHsl(int h, num s, num l, [num a = 1]) {
-    throw new Exception('Unimplemented setFillColorHsl');
-  }
-
-  void setFillColorRgb(int r, int g, int b, [num a = 1]) {
-    throw new Exception('Unimplemented setFillColorRgb');
-  }
-
-  void setLineDash(List<num> dash) {
-    var valid = true;
-    var new_dash;
-    if (dash.length % 2 == 1) {
-      new_dash = new List<double>(2 * dash.length);
-      for (int i = 0; i < dash.length; i++) {
-        double v = dash[i].toDouble();
-        if (v < 0) {
-          valid = false;
-          break;
-        }
-        new_dash[i] = new_dash[i + dash.length] = v;
-      }
-    } else {
-      new_dash = new List<double>(dash.length);
-      for (int i = 0; i < dash.length; i++) {
-        double v = dash[i].toDouble();
-        if (v < 0) {
-          valid = false;
-          break;
-        }
-        new_dash[i] = v;
-      }
-    }
-    if (valid) {
-      _SetLineDash(_handle, _lineDash = new_dash);
-    }
-  }
-
-  void setStrokeColorHsl(int h, num s, num l, [num a = 1]) {
-    throw new Exception('Unimplemented setStrokeColorHsl');
-  }
-
-  void setStrokeColorRgb(int r, int g, int b, [num a = 1]) {
-    throw new Exception('Unimplemented setStrokeColorRgb');
-  }
-
-  void setTransform(num m11, num m12, num m21, num m22, num dx, num dy) =>
-    _SetTransform(_handle, m11.toDouble(), m12.toDouble(),
-                           m21.toDouble(), m22.toDouble(),
-                           dx.toDouble(), dy.toDouble());
-
-  void stroke() => _Stroke(_handle);
-
-  void strokeRect(num x, num y, num w, num h, [num lineWidth]) =>
-    _StrokeRect(_handle, x.toDouble(), y.toDouble(),
-        w.toDouble(), h.toDouble());
-
-  void strokeText(String text, num x, num y, [num maxWidth = -1]) =>
-    _StrokeText(_handle, text, x.toDouble(), y.toDouble(),
-        maxWidth.toDouble());
-
-  void transform(num m11, num m12, num m21, num m22, num dx, num dy) =>
-    _Transform(_handle, m11.toDouble(), m12.toDouble(),
-                        m21.toDouble(), m22.toDouble(),
-                        dx.toDouble(), dy.toDouble());
-
-  void translate(num x, num y) =>
-    _Translate(_handle, x.toDouble(), y.toDouble());
-
-  ImageData webkitGetImageDataHD(num sx, num sy, num sw, num sh) {
-    throw new Exception('Unimplemented webkitGetImageDataHD');
-  }
-
-  void webkitPutImageDataHD(ImageData imagedata, num dx, num dy,
-                           [num dirtyX, num dirtyY,
-                            num dirtyWidth, num dirtyHeight]) {
-    throw new Exception('Unimplemented webkitGetImageDataHD');
-  }
-
-  // TODO(vsm): Kill.
-  noSuchMethod(invocation) {
-      throw new Exception('Unimplemented/unknown ${invocation.memberName}');
-  }
-}
-
-var sfx_extension = 'raw';
-int _loadSample(String s) native "LoadSample";
-int _playSample(String s) native "PlaySample";