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e3d9ea67da
This patch simplifies the SkPicture we generate for Skia. Instead of drawing everything into a nested SkPicture, we now draw everything into the top-level picture, which requires us to apply the device scale factor in Dart.
76 lines
2.1 KiB
Dart
76 lines
2.1 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:math' as math;
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import 'dart:sky';
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import 'package:sky/mojo/net/image_cache.dart' as image_cache;
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double timeBase = null;
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Image image = null;
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String url1 = "https://www.dartlang.org/logos/dart-logo.png";
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String url2 = "http://i2.kym-cdn.com/photos/images/facebook/000/581/296/c09.jpg";
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void beginFrame(double timeStamp) {
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if (timeBase == null)
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timeBase = timeStamp;
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double delta = timeStamp - timeBase;
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PictureRecorder recorder = new PictureRecorder();
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final double devicePixelRatio = view.devicePixelRatio;
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Canvas canvas = new Canvas(recorder, Point.origin & new Size(view.width * devicePixelRatio, view.height * devicePixelRatio));
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cavnas.scale(devicePixelRatio, devicePixelRatio);
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canvas.translate(view.width / 2.0, view.height / 2.0);
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canvas.rotate(math.PI * delta / 1800);
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canvas.scale(0.2, 0.2);
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Paint paint = new Paint()..color = const Color.fromARGB(255, 0, 255, 0);
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// Draw image
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if (image != null)
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canvas.drawImage(image, new Point(-image.width / 2.0, -image.height / 2.0), paint);
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// Draw cut out of image
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canvas.rotate(math.PI * delta / 1800);
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if (image != null) {
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var w = image.width.toDouble();
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var h = image.width.toDouble();
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canvas.drawImageRect(image,
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new Rect.fromLTRB(w * 0.25, h * 0.25, w * 0.75, h * 0.75),
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new Rect.fromLTRB(-w / 4.0, -h / 4.0, w / 4.0, h / 4.0),
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paint);
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}
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view.picture = recorder.endRecording();
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view.scheduleFrame();
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}
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void handleImageLoad(result) {
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if (result != image) {
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print("${result.width}x${result.width} image loaded!");
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image = result;
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view.scheduleFrame();
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} else {
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print("Existing image was loaded again");
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}
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}
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bool handleEvent(Event event) {
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if (event.type == "pointerdown") {
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return true;
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}
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if (event.type == "pointerup") {
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image_cache.load(url2).then(handleImageLoad);
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return true;
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}
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return false;
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}
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void main() {
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image_cache.load(url1).then(handleImageLoad);
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view.setEventCallback(handleEvent);
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view.setFrameCallback(beginFrame);
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}
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