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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.
32 lines
1.1 KiB
Dart
32 lines
1.1 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:sky';
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import 'dart:math' as math;
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double timeBase = null;
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void beginFrame(double timeStamp) {
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tracing.begin('beginFrame');
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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, new Rect.fromLTWH(0.0, 0.0, view.width * devicePixelRatio, view.height * devicePixelRatio));
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canvas.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.drawRect(new Rect.fromLTRB(-100.0, -100.0, 100.0, 100.0),
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new Paint()..color = const Color.fromARGB(255, 0, 255, 0));
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view.picture = recorder.endRecording();
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view.scheduleFrame();
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tracing.end('beginFrame');
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}
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void main() {
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view.setFrameCallback(beginFrame);
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view.scheduleFrame();
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}
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