Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
250 views
in Technique[技术] by (71.8m points)

texture (image) on text in flutter

is there a way to put image (texture) on a text in Flutter?

like the image shown below

enter image description here

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

the operation of drawing image on text is asynchronous, because it waits for the image to be loaded and set it on the TextStyle's foreground shader.

import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'dart:async';
import 'dart:typed_data';
import 'dart:ui' as ui;

String textureName = "images/texture.jpg";
 Future<TextStyle> textureText(TextStyle textStyle,
    ) async {
  ui.Image img;
  img = await ImageLoader.load(textureName);
  Float64List matrix4 = new Matrix4.identity().storage;
  return textStyle.copyWith(
      foreground: Paint1()
        ..shader = ImageShader(img, TileMode.mirror, TileMode.mirror, matrix4));
}

below, FutureBuilder calls textureText and use the returned TextStyle

  Widget tt = new FutureBuilder<TextStyle>(
    future: texturedText(
        TextStyle(fontSize: 70.0,), // a Future<String> or null
    builder: (BuildContext context, AsyncSnapshot<TextStyle> snapshot) {
      switch (snapshot.connectionState) {
        case ConnectionState.waiting:
          return new Text('Awaiting result...');
        default:
          if (snapshot.hasError)
            return new Text('Error: ${snapshot.error}');
          else
            return new Text(
              'TEXTURE',
              style: snapshot.data,
            );
      }
    },
  );

you can use tt (texturedText) like a normal widget.

A complete example is also available in this repo.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...