[Bug]Toggle On UseGPU Cause Memory Leak

[c0nstexpr]

Add LiveCharts.UseGPU = true at app startup and use following xaml layout

<Window x:Class="WpfApp.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:lvc="clr-namespace:LiveChartsCore.SkiaSharpView.WPF;assembly=LiveChartsCore.SkiaSharpView.WPF"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:ui="http://schemas.lepo.co/wpfui/2022/xaml"
        xmlns:wpfapp="clr-namespace:WpfApp"
        Title="MainWindow"
        Width="800"
        Height="450"
        mc:Ignorable="d">
    <TabControl>
        <TabItem Header="1">
            <StackPanel>
                <lvc:CartesianChart/>
                <lvc:CartesianChart/>
                <lvc:CartesianChart/>
                <lvc:CartesianChart/>
                <lvc:CartesianChart/>
                <lvc:CartesianChart/>
                <lvc:CartesianChart/>
            </StackPanel>
        </TabItem>

        <TabItem Header="2">
            <StackPanel>
                <lvc:CartesianChart/>
                <lvc:CartesianChart/>
                <lvc:CartesianChart/>
                <lvc:CartesianChart/>
                <lvc:CartesianChart/>
                <lvc:CartesianChart/>
                <lvc:CartesianChart/>
            </StackPanel>
        </TabItem>
    </TabControl>
</Window>

Once we switch between the tab items, the memory usage increased

[beto-rodriguez]

This is a SkiaSharp Issue mono/SkiaSharp#3309

A workaround for now could be to update OpenTK, and use reflection to dispose the base control. Maybe the best is to wait for a fix for that issue.

[ezhassen]

@beto-rodriguez is it possible to use custom Skia.views for WinForms and WPF (instead of SkiaSharp.Views.WindowsForms and SkiaSharp.Views.WPF)?

i did that in a fork to avoid unnecessary dependency to full openTK and works without issues.

and separated native rendering and GL rendering (as GL rendering not needed most cases).
and that fixes dependency issues

SkiaSharpEzz.Views
openTK
GLControl
GLWpfControl

[beto-rodriguez]

@ezhassen That is a solid alternative, we can consider it if the SkiaSharp issue is not fixed soon.

The only problem to use our own views is to maintain them :( LiveCharts is already too big.