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a733e91b7b
When we start, we might not have initialized the devicePixelRatio value. The value will be initialized by the time we paint, so now we update the value every time we paint.
115 lines
3.3 KiB
Dart
115 lines
3.3 KiB
Dart
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:sky' as sky;
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import 'package:sky/base/scheduler.dart' as scheduler;
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import 'package:sky/rendering/layer.dart';
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import 'package:sky/rendering/object.dart';
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import 'package:sky/rendering/box.dart';
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import 'package:vector_math/vector_math.dart';
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class ViewConstraints {
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const ViewConstraints({
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this.size: Size.zero,
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this.orientation
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});
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final Size size;
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final int orientation;
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}
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class RenderView extends RenderObject with RenderObjectWithChildMixin<RenderBox> {
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RenderView({
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RenderBox child,
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this.timeForRotation: const Duration(microseconds: 83333)
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}) {
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this.child = child;
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}
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Duration timeForRotation;
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Size _size = Size.zero;
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Size get size => _size;
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int _orientation; // 0..3
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int get orientation => _orientation;
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ViewConstraints _rootConstraints;
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ViewConstraints get rootConstraints => _rootConstraints;
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void set rootConstraints(ViewConstraints value) {
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if (_rootConstraints == value)
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return;
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_rootConstraints = value;
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markNeedsLayout();
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}
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Matrix4 get _logicalToDeviceTransform {
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double devicePixelRatio = sky.view.devicePixelRatio;
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return new Matrix4.diagonal3Values(devicePixelRatio, devicePixelRatio, 1.0);
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}
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void scheduleInitialFrame() {
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scheduleInitialLayout();
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scheduleInitialPaint(new TransformLayer(transform: _logicalToDeviceTransform));
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scheduler.ensureVisualUpdate();
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}
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// We never call layout() on this class, so this should never get
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// checked. (This class is laid out using scheduleInitialLayout().)
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bool debugDoesMeetConstraints() { assert(false); return false; }
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void performResize() {
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assert(false);
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}
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void performLayout() {
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if (_rootConstraints.orientation != _orientation) {
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if (_orientation != null && child != null)
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child.rotate(oldAngle: _orientation, newAngle: _rootConstraints.orientation, time: timeForRotation);
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_orientation = _rootConstraints.orientation;
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}
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_size = _rootConstraints.size;
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assert(!_size.isInfinite);
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if (child != null)
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child.layout(new BoxConstraints.tight(_size));
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}
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void rotate({ int oldAngle, int newAngle, Duration time }) {
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assert(false); // nobody tells the screen to rotate, the whole rotate() dance is started from our performResize()
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}
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bool hitTest(HitTestResult result, { Point position }) {
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if (child != null) {
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Rect childBounds = Point.origin & child.size;
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if (childBounds.contains(position))
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child.hitTest(result, position: position);
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}
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result.add(new HitTestEntry(this));
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return true;
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}
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bool get hasLayer => true;
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void paint(PaintingContext context, Offset offset) {
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if (child != null)
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context.paintChild(child, offset.toPoint());
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}
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void compositeFrame() {
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sky.tracing.begin('RenderView.compositeFrame');
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try {
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(layer as TransformLayer).transform = _logicalToDeviceTransform;
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Rect bounds = Point.origin & (size * sky.view.devicePixelRatio);
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sky.SceneBuilder builder = new sky.SceneBuilder(bounds);
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layer.addToScene(builder, Offset.zero);
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sky.view.scene = builder.build();
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} finally {
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sky.tracing.end('RenderView.compositeFrame');
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}
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}
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Rect get paintBounds => Point.origin & size;
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}
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