Remove all clients of sky.view.picture

Everyone uses sky.view.scene now. This patch also cleans up the raw examples
and makes them follow a consistent pattern.

examples/raw/baseline.dart

@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 import 'dart:sky' as sky;
+import 'dart:typed_data';
 
 void drawText(sky.Canvas canvas, String lh) {
   sky.Paint paint = new sky.Paint();
@@ -44,14 +45,10 @@ void drawText(sky.Canvas canvas, String lh) {
   layoutRoot.paint(canvas);
 }
 
-void main() {
-  // prepare the rendering
+sky.Picture paint(sky.Rect paintBounds) {
   sky.PictureRecorder recorder = new sky.PictureRecorder();
-  final double devicePixelRatio = sky.view.devicePixelRatio;
-  sky.Canvas canvas = new sky.Canvas(recorder, new sky.Rect.fromLTWH(0.0, 0.0, sky.view.width * devicePixelRatio, sky.view.height * devicePixelRatio));
-  canvas.scale(devicePixelRatio, devicePixelRatio);
+  sky.Canvas canvas = new sky.Canvas(recorder, paintBounds);
 
-  // background
   sky.Paint paint = new sky.Paint();
   paint.color = const sky.Color(0xFFFFFFFF);
   paint.setStyle(sky.PaintingStyle.fill);
@@ -61,7 +58,30 @@ void main() {
   drawText(canvas, '1.0');
   drawText(canvas, 'lh');
 
-  // put it on the screen
-  sky.view.picture = recorder.endRecording();
+  return recorder.endRecording();
+}
+
+sky.Scene composite(sky.Picture picture, sky.Rect paintBounds) {
+  final double devicePixelRatio = sky.view.devicePixelRatio;
+  sky.Rect sceneBounds = new sky.Rect.fromLTWH(0.0, 0.0, sky.view.width * devicePixelRatio, sky.view.height * devicePixelRatio);
+  Float32List deviceTransform = new Float32List(16)
+    ..[0] = devicePixelRatio
+    ..[5] = devicePixelRatio;
+  sky.SceneBuilder sceneBuilder = new sky.SceneBuilder(sceneBounds)
+    ..pushTransform(deviceTransform)
+    ..addPicture(sky.Offset.zero, picture, paintBounds)
+    ..pop();
+  return sceneBuilder.build();
+}
+
+void beginFrame(double timeStamp) {
+  sky.Rect paintBounds = new sky.Rect.fromLTWH(0.0, 0.0, sky.view.width, sky.view.height);
+  sky.Picture picture = paint(paintBounds);
+  sky.Scene scene = composite(picture, paintBounds);
+  sky.view.scene = scene;
+}
+
+void main() {
+  sky.view.setFrameCallback(beginFrame);
   sky.view.scheduleFrame();
 }

examples/raw/hello_world.dart

@@ -2,37 +2,59 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'dart:sky';
+import 'dart:sky' as sky;
+import 'dart:typed_data';
 
-Picture draw(int a, int r, int g, int b) {
-  Size size = new Size(view.width, view.height);
+sky.Color color;
+
+sky.Picture paint(sky.Rect paintBounds) {
+  sky.PictureRecorder recorder = new sky.PictureRecorder();
+  sky.Canvas canvas = new sky.Canvas(recorder, paintBounds);
+  sky.Size size = paintBounds.size;
 
-  PictureRecorder recorder = new PictureRecorder();
-  final double devicePixelRatio = view.devicePixelRatio;
-  Canvas canvas = new Canvas(recorder, Point.origin & (size * devicePixelRatio));
-  canvas.scale(devicePixelRatio, devicePixelRatio);
   double radius = size.shortestSide * 0.45;
+  sky.Paint paint = new sky.Paint()
+    ..color = color;
+  canvas.drawCircle(size.center(sky.Point.origin), radius, paint);
 
-  Paint paint = new Paint()..color = new Color.fromARGB(a, r, g, b);
-  canvas.drawCircle(size.center(Point.origin), radius, paint);
   return recorder.endRecording();
 }
 
-bool handleEvent(Event event) {
-  if (event.type == "pointerdown") {
-    view.picture = draw(255, 0, 0, 255);
-    view.scheduleFrame();
+sky.Scene composite(sky.Picture picture, sky.Rect paintBounds) {
+  final double devicePixelRatio = sky.view.devicePixelRatio;
+  sky.Rect sceneBounds = new sky.Rect.fromLTWH(0.0, 0.0, sky.view.width * devicePixelRatio, sky.view.height * devicePixelRatio);
+  Float32List deviceTransform = new Float32List(16)
+    ..[0] = devicePixelRatio
+    ..[5] = devicePixelRatio;
+  sky.SceneBuilder sceneBuilder = new sky.SceneBuilder(sceneBounds)
+    ..pushTransform(deviceTransform)
+    ..addPicture(sky.Offset.zero, picture, paintBounds)
+    ..pop();
+  return sceneBuilder.build();
+}
+
+void beginFrame(double timeStamp) {
+  sky.Rect paintBounds = new sky.Rect.fromLTWH(0.0, 0.0, sky.view.width, sky.view.height);
+  sky.Picture picture = paint(paintBounds);
+  sky.Scene scene = composite(picture, paintBounds);
+  sky.view.scene = scene;
+}
+
+bool handleEvent(sky.Event event) {
+  if (event.type == 'pointerdown') {
+    color = new sky.Color.fromARGB(255, 0, 0, 255);
+    sky.view.scheduleFrame();
     return true;
   }
 
-  if (event.type == "pointerup") {
-    view.picture = draw(255, 0, 255, 0);
-    view.scheduleFrame();
+  if (event.type == 'pointerup') {
+    color = new sky.Color.fromARGB(255, 0, 255, 0);
+    sky.view.scheduleFrame();
     return true;
   }
 
-  if (event.type == "back") {
-    print("Pressed back button.");
+  if (event.type == 'back') {
+    print('Pressed back button.');
     return true;
   }
 
@@ -40,9 +62,9 @@ bool handleEvent(Event event) {
 }
 
 void main() {
-  print("Hello, world");
-  view.picture = draw(255, 0, 255, 0);
-  view.scheduleFrame();
-
-  view.setEventCallback(handleEvent);
+  print('Hello, world');
+  color = new sky.Color.fromARGB(255, 0, 255, 0);
+  sky.view.setFrameCallback(beginFrame);
+  sky.view.setEventCallback(handleEvent);
+  sky.view.scheduleFrame();
 }

examples/raw/mutating-dom.dart

@@ -2,8 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import "dart:math" as math;
+import 'dart:math' as math;
 import 'dart:sky' as sky;
+import 'dart:typed_data';
 
 const kMaxIterations = 100;
 int peakCount = 1000; // this is the number that must be reached for us to start reporting the peak number of nodes in the tree each frame
@@ -32,7 +33,7 @@ String colorToCSSString(sky.Color color) {
   return 'rgba(${color.red}, ${color.green}, ${color.blue}, ${color.alpha / 255.0})';
 }
 
-void doFrame(double timeStamp) {
+void mutate(sky.Canvas canvas) {
   // mutate the DOM randomly
   int iterationsLeft = kMaxIterations;
   sky.Node node = root;
@@ -201,16 +202,37 @@ void doFrame(double timeStamp) {
 
   // draw the result
   report("recording...");
-  sky.PictureRecorder recorder = new sky.PictureRecorder();
-  final double devicePixelRatio = sky.view.devicePixelRatio;
-  sky.Canvas canvas = new sky.Canvas(recorder, new sky.Rect.fromLTWH(0.0, 0.0, sky.view.width * devicePixelRatio, sky.view.height * devicePixelRatio));
-  canvas.scale(devicePixelRatio, devicePixelRatio);
   layoutRoot.maxWidth = sky.view.width;
   layoutRoot.layout();
   layoutRoot.paint(canvas);
   report("painting...");
-  sky.view.picture = recorder.endRecording();
-  sky.view.scheduleFrame();
+}
+
+sky.Picture paint(sky.Rect paintBounds) {
+  sky.PictureRecorder recorder = new sky.PictureRecorder();
+  sky.Canvas canvas = new sky.Canvas(recorder, paintBounds);
+  mutate(canvas);
+  return recorder.endRecording();
+}
+
+sky.Scene composite(sky.Picture picture, sky.Rect paintBounds) {
+  final double devicePixelRatio = sky.view.devicePixelRatio;
+  sky.Rect sceneBounds = new sky.Rect.fromLTWH(0.0, 0.0, sky.view.width * devicePixelRatio, sky.view.height * devicePixelRatio);
+  Float32List deviceTransform = new Float32List(16)
+    ..[0] = devicePixelRatio
+    ..[5] = devicePixelRatio;
+  sky.SceneBuilder sceneBuilder = new sky.SceneBuilder(sceneBounds)
+    ..pushTransform(deviceTransform)
+    ..addPicture(sky.Offset.zero, picture, paintBounds)
+    ..pop();
+  return sceneBuilder.build();
+}
+
+void beginFrame(double timeStamp) {
+  sky.Rect paintBounds = new sky.Rect.fromLTWH(0.0, 0.0, sky.view.width, sky.view.height);
+  sky.Picture picture = paint(paintBounds);
+  sky.Scene scene = composite(picture, paintBounds);
+  sky.view.scene = scene;
 }
 
 void main() {
@@ -218,6 +240,6 @@ void main() {
   root.style['display'] = 'paragraph';
   root.style['color'] = '#FFFFFF';
   layoutRoot.rootElement = root;
-  sky.view.setFrameCallback(doFrame);
+  sky.view.setFrameCallback(beginFrame);
   sky.view.scheduleFrame();
 }

examples/raw/painting.dart

@@ -6,21 +6,17 @@ import 'dart:sky' as sky;
 import 'dart:math' as math;
 import 'dart:typed_data';
 
-void beginFrame(double timeStamp) {
-  sky.Size size = new sky.Size(sky.view.width, sky.view.height);
+sky.Picture paint(sky.Rect paintBounds) {
   sky.PictureRecorder recorder = new sky.PictureRecorder();
-  final double devicePixelRatio = sky.view.devicePixelRatio;
-  sky.Canvas canvas = new sky.Canvas(recorder, sky.Point.origin & (size * devicePixelRatio));
-  canvas.scale(devicePixelRatio, devicePixelRatio);
+  sky.Canvas canvas = new sky.Canvas(recorder, paintBounds);
+  sky.Size size = paintBounds.size;
 
   sky.Paint paint = new sky.Paint();
   sky.Point mid = size.center(sky.Point.origin);
   double radius = size.shortestSide / 2.0;
-
   canvas.drawPaint(new sky.Paint()..color = const sky.Color(0xFFFFFFFF));
 
   canvas.save();
-
   canvas.translate(-mid.x/2.0, sky.view.height*2.0);
   canvas.clipRect(
       new sky.Rect.fromLTRB(0.0, -sky.view.height, sky.view.width, radius));
@@ -39,7 +35,7 @@ void beginFrame(double timeStamp) {
   var scaleMatrix = new Float32List.fromList([
       0.5, 0.0, 0.0, 0.0,
       0.0, 0.5, 0.0, 0.0,
-      0.0, 0.0, 0.0, 0.0,
+      0.0, 0.0, 1.0, 0.0,
       0.0, 0.0, 0.0, 1.0,
   ]);
   canvas.concat(scaleMatrix);
@@ -81,7 +77,27 @@ void beginFrame(double timeStamp) {
   paint.setDrawLooper(builder.build());
   canvas.drawCircle(sky.Point.origin, radius, paint);
 
-  sky.view.picture = recorder.endRecording();
+  return recorder.endRecording();
+}
+
+sky.Scene composite(sky.Picture picture, sky.Rect paintBounds) {
+  final double devicePixelRatio = sky.view.devicePixelRatio;
+  sky.Rect sceneBounds = new sky.Rect.fromLTWH(0.0, 0.0, sky.view.width * devicePixelRatio, sky.view.height * devicePixelRatio);
+  Float32List deviceTransform = new Float32List(16)
+    ..[0] = devicePixelRatio
+    ..[5] = devicePixelRatio;
+  sky.SceneBuilder sceneBuilder = new sky.SceneBuilder(sceneBounds)
+    ..pushTransform(deviceTransform)
+    ..addPicture(sky.Offset.zero, picture, paintBounds)
+    ..pop();
+  return sceneBuilder.build();
+}
+
+void beginFrame(double timeStamp) {
+  sky.Rect paintBounds = new sky.Rect.fromLTWH(0.0, 0.0, sky.view.width, sky.view.height);
+  sky.Picture picture = paint(paintBounds);
+  sky.Scene scene = composite(picture, paintBounds);
+  sky.view.scene = scene;
 }
 
 void main() {

examples/raw/shadow.dart

@@ -2,41 +2,62 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'dart:sky';
+import 'dart:sky' as sky;
+import 'dart:typed_data';
+
+sky.Picture paint(sky.Rect paintBounds) {
+  sky.PictureRecorder recorder = new sky.PictureRecorder();
+  sky.Canvas canvas = new sky.Canvas(recorder, paintBounds);
 
-void beginFrame(double timeStamp) {
   double size = 100.0;
-  PictureRecorder recorder = new PictureRecorder();
-  final double devicePixelRatio = view.devicePixelRatio;
-  Canvas canvas = new Canvas(recorder, new Rect.fromLTWH(0.0, 0.0, view.width * devicePixelRatio, view.height * devicePixelRatio));
-  canvas.scale(devicePixelRatio, devicePixelRatio);
   canvas.translate(size + 10.0, size + 10.0);
 
-  Paint paint = new Paint();
-  paint.color = const Color.fromARGB(255, 0, 255, 0);
-  var builder = new LayerDrawLooperBuilder()
+  sky.Paint paint = new sky.Paint();
+  paint.color = const sky.Color.fromARGB(255, 0, 255, 0);
+  var builder = new sky.LayerDrawLooperBuilder()
     // Shadow layer.
     ..addLayerOnTop(
-        new DrawLooperLayerInfo()
-          ..setPaintBits(PaintBits.all)
-          ..setOffset(const Offset(5.0, 5.0))
-          ..setColorMode(TransferMode.src),
-        new Paint()
-          ..color = const Color.fromARGB(128, 55, 55, 55)
+        new sky.DrawLooperLayerInfo()
+          ..setPaintBits(sky.PaintBits.all)
+          ..setOffset(const sky.Offset(5.0, 5.0))
+          ..setColorMode(sky.TransferMode.src),
+        new sky.Paint()
+          ..color = const sky.Color.fromARGB(128, 55, 55, 55)
           ..setMaskFilter(
-            new MaskFilter.blur(BlurStyle.normal, 5.0, highQuality: true))
+            new sky.MaskFilter.blur(sky.BlurStyle.normal, 5.0))
     )
     // Main layer.
-    ..addLayerOnTop(new DrawLooperLayerInfo(), new Paint());
+    ..addLayerOnTop(new sky.DrawLooperLayerInfo(), new sky.Paint());
   paint.setDrawLooper(builder.build());
 
   canvas.drawPaint(
-      new Paint()..color = const Color.fromARGB(255, 255, 255, 255));
-  canvas.drawRect(new Rect.fromLTRB(-size, -size, size, size), paint);
-  view.picture = recorder.endRecording();
+      new sky.Paint()..color = const sky.Color.fromARGB(255, 255, 255, 255));
+  canvas.drawRect(new sky.Rect.fromLTRB(-size, -size, size, size), paint);
+
+  return recorder.endRecording();
+}
+
+sky.Scene composite(sky.Picture picture, sky.Rect paintBounds) {
+  final double devicePixelRatio = sky.view.devicePixelRatio;
+  sky.Rect sceneBounds = new sky.Rect.fromLTWH(0.0, 0.0, sky.view.width * devicePixelRatio, sky.view.height * devicePixelRatio);
+  Float32List deviceTransform = new Float32List(16)
+    ..[0] = devicePixelRatio
+    ..[5] = devicePixelRatio;
+  sky.SceneBuilder sceneBuilder = new sky.SceneBuilder(sceneBounds)
+    ..pushTransform(deviceTransform)
+    ..addPicture(sky.Offset.zero, picture, paintBounds)
+    ..pop();
+  return sceneBuilder.build();
+}
+
+void beginFrame(double timeStamp) {
+  sky.Rect paintBounds = new sky.Rect.fromLTWH(0.0, 0.0, sky.view.width, sky.view.height);
+  sky.Picture picture = paint(paintBounds);
+  sky.Scene scene = composite(picture, paintBounds);
+  sky.view.scene = scene;
 }
 
 void main() {
-  view.setFrameCallback(beginFrame);
-  view.scheduleFrame();
+  sky.view.setFrameCallback(beginFrame);
+  sky.view.scheduleFrame();
 }

examples/raw/spinning_arabic.dart

@@ -2,24 +2,21 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import "dart:math" as math;
-import 'dart:sky';
+import 'dart:math' as math;
+import 'dart:sky' as sky;
+import 'dart:typed_data';
 
 double timeBase = null;
-LayoutRoot layoutRoot = new LayoutRoot();
+sky.LayoutRoot layoutRoot = new sky.LayoutRoot();
 
-void beginFrame(double timeStamp) {
-  if (timeBase == null)
-    timeBase = timeStamp;
-  double delta = timeStamp - timeBase;
-  PictureRecorder recorder = new PictureRecorder();
-  final double devicePixelRatio = view.devicePixelRatio;
-  Canvas canvas = new Canvas(recorder, new Rect.fromLTWH(0.0, 0.0, view.width * devicePixelRatio, view.height * devicePixelRatio));
-  canvas.scale(devicePixelRatio, devicePixelRatio);
-  canvas.translate(view.width / 2.0, view.height / 2.0);
+sky.Picture paint(sky.Rect paintBounds, double delta) {
+  sky.PictureRecorder recorder = new sky.PictureRecorder();
+  sky.Canvas canvas = new sky.Canvas(recorder, paintBounds);
+
+  canvas.translate(sky.view.width / 2.0, sky.view.height / 2.0);
   canvas.rotate(math.PI * delta / 1800);
-  canvas.drawRect(new Rect.fromLTRB(-100.0, -100.0, 100.0, 100.0),
-                  new Paint()..color = const Color.fromARGB(255, 0, 255, 0));
+  canvas.drawRect(new sky.Rect.fromLTRB(-100.0, -100.0, 100.0, 100.0),
+                  new sky.Paint()..color = const sky.Color.fromARGB(255, 0, 255, 0));
 
   double sin = math.sin(delta / 200);
   layoutRoot.maxWidth = 150.0 + (50 * sin);
@@ -28,12 +25,34 @@ void beginFrame(double timeStamp) {
   canvas.translate(layoutRoot.maxWidth / -2.0, (layoutRoot.maxWidth / 2.0) - 125);
   layoutRoot.paint(canvas);
 
-  view.picture = recorder.endRecording();
-  view.scheduleFrame();
+  return recorder.endRecording();
+}
+
+sky.Scene composite(sky.Picture picture, sky.Rect paintBounds) {
+  final double devicePixelRatio = sky.view.devicePixelRatio;
+  sky.Rect sceneBounds = new sky.Rect.fromLTWH(0.0, 0.0, sky.view.width * devicePixelRatio, sky.view.height * devicePixelRatio);
+  Float32List deviceTransform = new Float32List(16)
+    ..[0] = devicePixelRatio
+    ..[5] = devicePixelRatio;
+  sky.SceneBuilder sceneBuilder = new sky.SceneBuilder(sceneBounds)
+    ..pushTransform(deviceTransform)
+    ..addPicture(sky.Offset.zero, picture, paintBounds)
+    ..pop();
+  return sceneBuilder.build();
+}
+
+void beginFrame(double timeStamp) {
+  if (timeBase == null)
+    timeBase = timeStamp;
+  double delta = timeStamp - timeBase;
+  sky.Rect paintBounds = new sky.Rect.fromLTWH(0.0, 0.0, sky.view.width, sky.view.height);
+  sky.Picture picture = paint(paintBounds, delta);
+  sky.Scene scene = composite(picture, paintBounds);
+  sky.view.scene = scene;
 }
 
 void main() {
-  var document = new Document();
+  var document = new sky.Document();
   var arabic = document.createText("هذا هو قليلا طويلة من النص الذي يجب التفاف .");
   var more = document.createText(" و أكثر قليلا لجعله أطول. ");
   var block = document.createElement('p');
@@ -45,6 +64,6 @@ void main() {
 
   layoutRoot.rootElement = block;
 
-  view.setFrameCallback(beginFrame);
-  view.scheduleFrame();
+  sky.view.setFrameCallback(beginFrame);
+  sky.view.scheduleFrame();
 }

examples/raw/spinning_image.dart

@@ -3,32 +3,29 @@
 // found in the LICENSE file.
 
 import 'dart:math' as math;
-import 'dart:sky';
+import 'dart:sky' as sky;
+import 'dart:typed_data';
 
 import 'package:sky/mojo/net/image_cache.dart' as image_cache;
 
 double timeBase = null;
 
-Image image = null;
+sky.Image image = null;
 String url1 = "https://www.dartlang.org/logos/dart-logo.png";
 String url2 = "http://i2.kym-cdn.com/photos/images/facebook/000/581/296/c09.jpg";
 
-void beginFrame(double timeStamp) {
-  if (timeBase == null)
-    timeBase = timeStamp;
-  double delta = timeStamp - timeBase;
-  PictureRecorder recorder = new PictureRecorder();
-  final double devicePixelRatio = view.devicePixelRatio;
-  Canvas canvas = new Canvas(recorder, Point.origin & new Size(view.width * devicePixelRatio, view.height * devicePixelRatio));
-  canvas.scale(devicePixelRatio, devicePixelRatio);
-  canvas.translate(view.width / 2.0, view.height / 2.0);
+sky.Picture paint(sky.Rect paintBounds, double delta) {
+  sky.PictureRecorder recorder = new sky.PictureRecorder();
+  sky.Canvas canvas = new sky.Canvas(recorder, paintBounds);
+
+  canvas.translate(paintBounds.width / 2.0, paintBounds.height / 2.0);
   canvas.rotate(math.PI * delta / 1800);
   canvas.scale(0.2, 0.2);
-  Paint paint = new Paint()..color = const Color.fromARGB(255, 0, 255, 0);
+  sky.Paint paint = new sky.Paint()..color = const sky.Color.fromARGB(255, 0, 255, 0);
 
   // Draw image
   if (image != null)
-    canvas.drawImage(image, new Point(-image.width / 2.0, -image.height / 2.0), paint);
+    canvas.drawImage(image, new sky.Point(-image.width / 2.0, -image.height / 2.0), paint);
 
   // Draw cut out of image
   canvas.rotate(math.PI * delta / 1800);
@@ -36,26 +33,49 @@ void beginFrame(double timeStamp) {
     var w = image.width.toDouble();
     var h = image.width.toDouble();
     canvas.drawImageRect(image,
-      new Rect.fromLTRB(w * 0.25, h * 0.25, w * 0.75, h * 0.75),
-      new Rect.fromLTRB(-w / 4.0, -h / 4.0, w / 4.0, h / 4.0),
+      new sky.Rect.fromLTRB(w * 0.25, h * 0.25, w * 0.75, h * 0.75),
+      new sky.Rect.fromLTRB(-w / 4.0, -h / 4.0, w / 4.0, h / 4.0),
       paint);
   }
 
-  view.picture = recorder.endRecording();
-  view.scheduleFrame();
+  return recorder.endRecording();
+}
+
+sky.Scene composite(sky.Picture picture, sky.Rect paintBounds) {
+  final double devicePixelRatio = sky.view.devicePixelRatio;
+  sky.Rect sceneBounds = new sky.Rect.fromLTWH(0.0, 0.0, sky.view.width * devicePixelRatio, sky.view.height * devicePixelRatio);
+  Float32List deviceTransform = new Float32List(16)
+    ..[0] = devicePixelRatio
+    ..[5] = devicePixelRatio;
+  sky.SceneBuilder sceneBuilder = new sky.SceneBuilder(sceneBounds)
+    ..pushTransform(deviceTransform)
+    ..addPicture(sky.Offset.zero, picture, paintBounds)
+    ..pop();
+  return sceneBuilder.build();
 }
 
+void beginFrame(double timeStamp) {
+  if (timeBase == null)
+    timeBase = timeStamp;
+  double delta = timeStamp - timeBase;
+  sky.Rect paintBounds = new sky.Rect.fromLTWH(0.0, 0.0, sky.view.width, sky.view.height);
+  sky.Picture picture = paint(paintBounds, delta);
+  sky.Scene scene = composite(picture, paintBounds);
+  sky.view.scene = scene;
+}
+
+
 void handleImageLoad(result) {
   if (result != image) {
     print("${result.width}x${result.width} image loaded!");
     image = result;
-    view.scheduleFrame();
+    sky.view.scheduleFrame();
   } else {
     print("Existing image was loaded again");
   }
 }
 
-bool handleEvent(Event event) {
+bool handleEvent(sky.Event event) {
   if (event.type == "pointerdown") {
     return true;
   }
@@ -70,6 +90,6 @@ bool handleEvent(Event event) {
 
 void main() {
   image_cache.load(url1).first.then(handleImageLoad);
-  view.setEventCallback(handleEvent);
-  view.setFrameCallback(beginFrame);
+  sky.view.setEventCallback(handleEvent);
+  sky.view.setFrameCallback(beginFrame);
 }

examples/raw/spinning_square.dart

@@ -2,30 +2,44 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'dart:sky';
 import 'dart:math' as math;
+import 'dart:sky' as sky;
+import 'dart:typed_data';
 
 double timeBase = null;
 
 void beginFrame(double timeStamp) {
-  tracing.begin('beginFrame');
+  sky.tracing.begin('beginFrame');
   if (timeBase == null)
     timeBase = timeStamp;
   double delta = timeStamp - timeBase;
-  PictureRecorder recorder = new PictureRecorder();
-  final double devicePixelRatio = view.devicePixelRatio;
-  Canvas canvas = new Canvas(recorder, new Rect.fromLTWH(0.0, 0.0, view.width * devicePixelRatio, view.height * devicePixelRatio));
-  canvas.scale(devicePixelRatio, devicePixelRatio);
-  canvas.translate(view.width / 2.0, view.height / 2.0);
+
+  // paint
+  sky.Rect paintBounds = new sky.Rect.fromLTWH(0.0, 0.0, sky.view.width, sky.view.height);
+  sky.PictureRecorder recorder = new sky.PictureRecorder();
+  sky.Canvas canvas = new sky.Canvas(recorder, paintBounds);
+  canvas.translate(paintBounds.width / 2.0, paintBounds.height / 2.0);
   canvas.rotate(math.PI * delta / 1800);
-  canvas.drawRect(new Rect.fromLTRB(-100.0, -100.0, 100.0, 100.0),
-                  new Paint()..color = const Color.fromARGB(255, 0, 255, 0));
-  view.picture = recorder.endRecording();
-  view.scheduleFrame();
-  tracing.end('beginFrame');
+  canvas.drawRect(new sky.Rect.fromLTRB(-100.0, -100.0, 100.0, 100.0),
+                  new sky.Paint()..color = const sky.Color.fromARGB(255, 0, 255, 0));
+  sky.Picture picture = recorder.endRecording();
+
+  // composite
+  final double devicePixelRatio = sky.view.devicePixelRatio;
+  sky.Rect sceneBounds = new sky.Rect.fromLTWH(0.0, 0.0, sky.view.width * devicePixelRatio, sky.view.height * devicePixelRatio);
+  Float32List deviceTransform = new Float32List(16)
+    ..[0] = devicePixelRatio
+    ..[5] = devicePixelRatio;
+  sky.SceneBuilder sceneBuilder = new sky.SceneBuilder(sceneBounds)
+    ..pushTransform(deviceTransform)
+    ..addPicture(sky.Offset.zero, picture, paintBounds)
+    ..pop();
+  sky.view.scene = sceneBuilder.build();
+
+  sky.tracing.end('beginFrame');
 }
 
 void main() {
-  view.setFrameCallback(beginFrame);
-  view.scheduleFrame();
+  sky.view.setFrameCallback(beginFrame);
+  sky.view.scheduleFrame();
 }

packages/flutter/lib/src/widgets/drawer_item.dart

@@ -15,7 +15,7 @@ import 'package:sky/src/widgets/icon.dart';
 import 'package:sky/src/widgets/ink_well.dart';
 import 'package:sky/src/widgets/theme.dart';
 
-typedef EventDisposition OnPressedFunction();
+typedef void OnPressedFunction();
 
 class DrawerItem extends ButtonBase {
   DrawerItem({ Key key, this.icon, this.child, this.onPressed, this.selected: false })