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915c52453b
Adds impeller benchmarks to track the progress of improvements made in https://github.com/flutter/flutter/issues/131345
115 lines
3.3 KiB
Dart
115 lines
3.3 KiB
Dart
// Copyright 2014 The Flutter 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:ui' as ui;
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import 'package:flutter/material.dart';
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Future<ui.Image> loadImage(String asset) async {
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final ui.ImmutableBuffer buffer = await ui.ImmutableBuffer.fromAsset(asset);
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final ui.Codec codec = await PaintingBinding.instance.instantiateImageCodecWithSize(buffer);
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final ui.FrameInfo frameInfo = await codec.getNextFrame();
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return frameInfo.image;
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}
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class DrawVerticesPage extends StatefulWidget {
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const DrawVerticesPage({super.key});
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@override
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State<DrawVerticesPage> createState() => _DrawVerticesPageState();
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}
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class _DrawVerticesPageState extends State<DrawVerticesPage> with SingleTickerProviderStateMixin {
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late final AnimationController controller;
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double tick = 0.0;
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ui.Image? image;
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@override
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void initState() {
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super.initState();
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loadImage('packages/flutter_gallery_assets/food/butternut_squash_soup.png').then((ui.Image pending) {
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setState(() {
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image = pending;
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});
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});
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controller = AnimationController(vsync: this, duration: const Duration(hours: 1));
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controller.addListener(() {
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setState(() {
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tick += 1;
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});
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});
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controller.forward(from: 0);
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}
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@override
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void dispose() {
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controller.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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if (image == null) {
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return const Placeholder();
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}
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return CustomPaint(
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size: const Size(500, 500),
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painter: VerticesPainter(tick, image!),
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child: Container(),
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);
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}
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}
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class VerticesPainter extends CustomPainter {
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VerticesPainter(this.tick, this.image);
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final double tick;
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final ui.Image image;
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@override
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void paint(Canvas canvas, Size size) {
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canvas.translate(0, tick);
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final ui.Vertices vertices = ui.Vertices(
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VertexMode.triangles,
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const <Offset>[
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Offset.zero,
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Offset(0, 250),
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Offset(250, 0),
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Offset(0, 250),
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Offset(250, 0),
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Offset(250, 250)
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],
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textureCoordinates: <Offset>[
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Offset.zero,
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Offset(0, image.height.toDouble()),
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Offset(image.width.toDouble(), 0),
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Offset(0, image.height.toDouble()),
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Offset(image.width.toDouble(), 0),
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Offset(image.width.toDouble(), image.height.toDouble())
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],
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colors: <Color>[
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Colors.red,
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Colors.blue,
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Colors.green,
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Colors.red,
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Colors.blue,
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Colors.green,
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]
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);
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canvas.drawVertices(vertices, BlendMode.plus, Paint()..shader = ImageShader(image, TileMode.clamp, TileMode.clamp, Matrix4.identity().storage));
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canvas.translate(250, 0);
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canvas.drawVertices(vertices, BlendMode.plus, Paint()..shader = ImageShader(image, TileMode.clamp, TileMode.clamp, Matrix4.identity().storage));
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canvas.translate(0, 250);
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canvas.drawVertices(vertices, BlendMode.plus, Paint()..shader = ImageShader(image, TileMode.clamp, TileMode.clamp, Matrix4.identity().storage));
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canvas.translate(-250, 0);
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canvas.drawVertices(vertices, BlendMode.plus, Paint()..shader = ImageShader(image, TileMode.clamp, TileMode.clamp, Matrix4.identity().storage));
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}
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@override
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bool shouldRepaint(covariant CustomPainter oldDelegate) {
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return true;
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}
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}
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