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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 import 'dart:math' as math; | 5 import 'dart:math' as math; |
6 import 'dart:sky'; | 6 import 'dart:sky'; |
7 import 'package:sky/framework/net/image_cache.dart' as image_cache; | 7 import 'package:sky/framework/net/image_cache.dart' as image_cache; |
8 | 8 |
9 double timeBase = null; | 9 double timeBase = null; |
10 | 10 |
11 Image image = null; | 11 Image image = null; |
12 String url1 = "https://www.dartlang.org/logos/dart-logo.png"; | 12 String url1 = "https://www.dartlang.org/logos/dart-logo.png"; |
13 String url2 = "http://i2.kym-cdn.com/photos/images/facebook/000/581/296/c09.jpg"
; | 13 String url2 = "http://i2.kym-cdn.com/photos/images/facebook/000/581/296/c09.jpg"
; |
14 | 14 |
15 void beginFrame(double timeStamp) { | 15 void beginFrame(double timeStamp) { |
16 if (timeBase == null) timeBase = timeStamp; | 16 if (timeBase == null) timeBase = timeStamp; |
17 double delta = timeStamp - timeBase; | 17 double delta = timeStamp - timeBase; |
18 PictureRecorder canvas = new PictureRecorder(view.width, view.height); | 18 PictureRecorder canvas = new PictureRecorder(view.width, view.height); |
19 canvas.translate(view.width / 2.0, view.height / 2.0); | 19 canvas.translate(view.width / 2.0, view.height / 2.0); |
20 canvas.rotate(math.PI * delta / 1800); | 20 canvas.rotate(math.PI * delta / 1800); |
21 canvas.scale(0.2, 0.2); | 21 canvas.scale(0.2, 0.2); |
22 Paint paint = new Paint()..color = Color.fromARGB(255, 0, 255, 0); | 22 Paint paint = new Paint()..color = const Color.fromARGB(255, 0, 255, 0); |
23 if (image != null) | 23 if (image != null) |
24 canvas.drawImage(image, -image.width / 2.0, -image.height / 2.0, paint); | 24 canvas.drawImage(image, -image.width / 2.0, -image.height / 2.0, paint); |
25 view.picture = canvas.endRecording(); | 25 view.picture = canvas.endRecording(); |
26 view.scheduleFrame(); | 26 view.scheduleFrame(); |
27 } | 27 } |
28 | 28 |
29 void handleImageLoad(result) { | 29 void handleImageLoad(result) { |
30 if (result != image) { | 30 if (result != image) { |
31 print("${result.width}x${result.width} image loaded!"); | 31 print("${result.width}x${result.width} image loaded!"); |
32 image = result; | 32 image = result; |
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48 | 48 |
49 return false; | 49 return false; |
50 } | 50 } |
51 | 51 |
52 void main() { | 52 void main() { |
53 image_cache.load(url1, handleImageLoad); | 53 image_cache.load(url1, handleImageLoad); |
54 image_cache.load(url1, handleImageLoad); | 54 image_cache.load(url1, handleImageLoad); |
55 view.setEventCallback(handleEvent); | 55 view.setEventCallback(handleEvent); |
56 view.setBeginFrameCallback(beginFrame); | 56 view.setBeginFrameCallback(beginFrame); |
57 } | 57 } |
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