OLD | NEW |
(Empty) | |
| 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 |
| 3 // found in the LICENSE file. |
| 4 |
| 5 import 'dart:sky' as sky; |
| 6 import 'dart:math' as math; |
| 7 import 'dart:typed_data'; |
| 8 |
| 9 void beginFrame(double timeStamp) { |
| 10 sky.PictureRecorder context = new sky.PictureRecorder(sky.view.width, 200.0); |
| 11 |
| 12 sky.Paint paint = new sky.Paint(); |
| 13 sky.Point mid = new sky.Point(context.width / 2.0, context.height / 2.0); |
| 14 double radius = math.min(mid.x, mid.y); |
| 15 |
| 16 context.drawPaint(new sky.Paint()..color = const sky.Color(0xFFFFFFFF)); |
| 17 |
| 18 context.save(); |
| 19 |
| 20 context.translate(-mid.x/2.0, context.height*2.0); |
| 21 context.clipRect( |
| 22 new sky.Rect.fromLTRB(0.0, -context.height, context.width, radius)); |
| 23 |
| 24 context.translate(mid.x, mid.y); |
| 25 paint.color = const sky.Color.fromARGB(128, 255, 0, 255); |
| 26 context.rotate(math.PI/4.0); |
| 27 |
| 28 sky.Gradient yellowBlue = new sky.Gradient.linear( |
| 29 [new sky.Point(-radius, -radius), new sky.Point(0.0, 0.0)], |
| 30 [const sky.Color(0xFFFFFF00), const sky.Color(0xFF0000FF)]); |
| 31 context.drawRect(new sky.Rect.fromLTRB(-radius, -radius, radius, radius), |
| 32 new sky.Paint()..setShader(yellowBlue)); |
| 33 |
| 34 // Scale x and y by 0.5. |
| 35 var scaleMatrix = new Float32List.fromList([ |
| 36 0.5, 0.0, 0.0, 0.0, |
| 37 0.0, 0.5, 0.0, 0.0, |
| 38 0.0, 0.0, 0.0, 0.0, |
| 39 0.0, 0.0, 0.0, 1.0, |
| 40 ]); |
| 41 context.concat(scaleMatrix); |
| 42 paint.color = const sky.Color.fromARGB(128, 0, 255, 0); |
| 43 context.drawCircle(0.0, 0.0, radius, paint); |
| 44 |
| 45 context.restore(); |
| 46 |
| 47 context.translate(0.0, 50.0); |
| 48 var builder = new sky.LayerDrawLooperBuilder() |
| 49 ..addLayerOnTop( |
| 50 new sky.DrawLooperLayerInfo() |
| 51 ..setOffset(const sky.Point(150.0, 0.0)) |
| 52 ..setColorMode(sky.TransferMode.src) |
| 53 ..setPaintBits(sky.PaintBits.all), |
| 54 (sky.Paint layerPaint) { |
| 55 layerPaint.color = const sky.Color.fromARGB(128, 255, 255, 0); |
| 56 layerPaint.setColorFilter(new sky.ColorFilter.mode( |
| 57 const sky.Color.fromARGB(128, 0, 0, 255), sky.TransferMode.srcIn)); |
| 58 layerPaint.setMaskFilter(new sky.MaskFilter.blur( |
| 59 sky.BlurStyle.normal, 3.0, highQuality: true)); |
| 60 }) |
| 61 ..addLayerOnTop( |
| 62 new sky.DrawLooperLayerInfo() |
| 63 ..setOffset(const sky.Point(75.0, 75.0)) |
| 64 ..setColorMode(sky.TransferMode.src) |
| 65 ..setPaintBits(sky.PaintBits.shader), |
| 66 (sky.Paint layerPaint) { |
| 67 sky.Gradient redYellow = new sky.Gradient.radial( |
| 68 new sky.Point(0.0, 0.0), radius/3.0, |
| 69 [const sky.Color(0xFFFFFF00), const sky.Color(0xFFFF0000)], |
| 70 null, sky.TileMode.mirror); |
| 71 layerPaint.setShader(redYellow); |
| 72 // Since we're don't set sky.PaintBits.maskFilter, this has no effect. |
| 73 layerPaint.setMaskFilter(new sky.MaskFilter.blur( |
| 74 sky.BlurStyle.normal, 50.0, highQuality: true)); |
| 75 }) |
| 76 ..addLayerOnTop( |
| 77 new sky.DrawLooperLayerInfo()..setOffset(const sky.Point(225.0, 75.0))
, |
| 78 (sky.Paint layerPaint) { |
| 79 // Since this layer uses a DST color mode, this has no effect. |
| 80 layerPaint.color = const sky.Color.fromARGB(128, 255, 0, 0); |
| 81 }); |
| 82 paint.setDrawLooper(builder.build()); |
| 83 context.drawCircle(0.0, 0.0, radius, paint); |
| 84 |
| 85 sky.view.picture = context.endRecording(); |
| 86 } |
| 87 |
| 88 void main() { |
| 89 sky.view.setBeginFrameCallback(beginFrame); |
| 90 sky.view.scheduleFrame(); |
| 91 } |
OLD | NEW |