我在学习您的代码ImageShaderDemo的时候运行在真机上的时候，会显示报错，机型为小米mix2s，具体报错如下：

======== Exception caught by rendering library =====================================================

The following UnimplementedError was thrown during paint():

UnimplementedError

The relevant error-causing widget was:

CustomPaint CustomPaint:file:///Users/xxx/Documents/flutterProj/other/flutter-beginner/custom_paint/lib/painter/image_shader_demo.dart:55:14

When the exception was thrown, this was the stack:

#0 Matrix4.scale (package:vector_math/src/vector_math_64/matrix4.dart:886:7)

#1 Matrix4.scaled (package:vector_math/src/vector_math_64/matrix4.dart:908:65)

#2 ImageEditor.paint (package:custom_paint/painter/image_shader_demo.dart:97:15)

#3 RenderCustomPaint._paintWithPainter (package:flutter/src/rendering/custom_paint.dart:563:13)

#4 RenderCustomPaint.paint (package:flutter/src/rendering/custom_paint.dart:605:7)

#5 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2477:7)

#6 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:187:13)

#7 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:140:15)

#8 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2477:7)

#9 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:187:13)

#10 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:140:15)

#11 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2477:7)

#12 PaintingContext._repaintCompositedChild (package:flutter/src/rendering/object.dart:141:11)

#13 PaintingContext.repaintCompositedChild (package:flutter/src/rendering/object.dart:100:5)

#14 PipelineOwner.flushPaint (package:flutter/src/rendering/object.dart:995:29)

#15 RendererBinding.drawFrame (package:flutter/src/rendering/binding.dart:506:19)

#16 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:892:13)

#17 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:370:5)

#18 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1146:15)

#19 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1083:9)

#20 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:997:5)

#24 _invoke (dart:ui/hooks.dart:151:10)

#25 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:308:5)

#26 _drawFrame (dart:ui/hooks.dart:115:31)

(elided 3 frames from dart:async)

The following RenderObject was being processed when the exception was fired: RenderCustomPaint#f7613

... parentData: <none> (can use size)

... constraints: BoxConstraints(w=392.7, h=785.5)

... size: Size(392.7, 785.5)

... painter: ImageEditor#2738b()

RenderObject: RenderCustomPaint#f7613

parentData: <none> (can use size)

constraints: BoxConstraints(w=392.7, h=785.5)

size: Size(392.7, 785.5)

painter: ImageEditor#2738b()