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sharperang
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how is async() => await function() non-blocking but just function() is blocking. what changes.

This commit is contained in:
Maff 2019-10-08 15:03:37 +01:00
parent d9295de186
commit c324cabd88
3 changed files with 25 additions and 12 deletions
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14
paperangapp/App.config
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@ -1,6 +1,18 @@
<?xml version="1.0" encoding="utf-8" ?>
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
</startup>
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="AForge" publicKeyToken="c1db6ff4eaa06aeb" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-2.2.5.0" newVersion="2.2.5.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="AForge.Math" publicKeyToken="abba2e25397ee8c9" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-2.2.5.0" newVersion="2.2.5.0" />
</dependentAssembly>
</assemblyBinding>
</runtime>
</configuration>

17
paperangapp/MainWindow.xaml.cs
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@ -1,4 +1,5 @@
using System;
using AForge.Imaging.Filters;
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
@ -226,13 +227,16 @@ namespace paperangapp {
}
string fn=r.FileName;
r.Dispose();
//I would love to know how spawning this in another thread via Task.Run((lambda)) and waiting for it to finish via `await`
// is non-blocking, while simply running the code here is blocking.
//someone who is good at threading please help my family is dying
Bitmap bmg = await Task.Run(() => {
logger.Debug($"Loading image '{fn}' for print");
Image _=Image.FromFile(fn);
logger.Debug($"Loaded image '{fn}'");
logger.Debug("Disposed of dialog");
Bitmap bimg=new Bitmap(_, mmj.Printer.LineWidth*8,
(int)(mmj.Printer.LineWidth*8*((double)_.Height/_.Width)));
(int)(mmj.Printer.LineWidth*8*((double)_.Height/_.Width)));
logger.Debug("Loaded image as Bitmap");
_.Dispose();
logger.Debug("Disposed of Image");
@ -244,13 +248,10 @@ namespace paperangapp {
private async Task PrintBitmap(Bitmap bimg, bool dither = true) {
if(dither) {
logger.Trace("Dithering input bitmap");
bimg = AForge.Imaging.Filters.Grayscale.CommonAlgorithms.Y.Apply(bimg);
AForge.Imaging.Filters.OrderedDithering f = new
AForge.Imaging.Filters.OrderedDithering(bayer4);
//f.FormatTranslations.Clear();
//f.FormatTranslations[PixelFormat.Format1bppIndexed] = PixelFormat.Format1bppIndexed;
bimg = Grayscale.CommonAlgorithms.Y.Apply(bimg);
OrderedDithering f = new
OrderedDithering(bayer4);
bimg = f.Apply(bimg);
//bimg = new Accord.Imaging.Filters.BayerDithering().Apply(bimg);
logger.Debug("Dithered Bitmap");
}
bimg = CopyToBpp(bimg);

6
paperangapp/paperangapp.csproj
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@ -15,6 +15,8 @@
<AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
<Deterministic>true</Deterministic>
<IsWebBootstrapper>true</IsWebBootstrapper>
<NuGetPackageImportStamp>
</NuGetPackageImportStamp>
<PublishUrl>c:\swdep\paperang\</PublishUrl>
<Install>true</Install>
<InstallFrom>Web</InstallFrom>
@ -28,13 +30,11 @@
<InstallUrl>https://swdist.ext.maff.scot/paperang/</InstallUrl>
<CreateWebPageOnPublish>true</CreateWebPageOnPublish>
<WebPage>publish.htm</WebPage>
<ApplicationRevision>5</ApplicationRevision>
<ApplicationRevision>6</ApplicationRevision>
<ApplicationVersion>1.0.0.%2a</ApplicationVersion>
<UseApplicationTrust>false</UseApplicationTrust>
<PublishWizardCompleted>true</PublishWizardCompleted>
<BootstrapperEnabled>true</BootstrapperEnabled>
<NuGetPackageImportStamp>
</NuGetPackageImportStamp>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
<PlatformTarget>AnyCPU</PlatformTarget>