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‎.gitignore‎

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/.vs
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/packages
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/GcodeThumbnailExtension/obj
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/GcodeThumbnailExtension/bin

‎GcodeThumbnailExtension.sln‎

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio 14
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VisualStudioVersion = 14.0.25420.1
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "GcodeThumbnailExtension", "GcodeThumbnailExtension\GcodeThumbnailExtension.csproj", "{0BAFF894-FC5B-43D1-B09B-AB66EF63F8E7}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{0BAFF894-FC5B-43D1-B09B-AB66EF63F8E7}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{0BAFF894-FC5B-43D1-B09B-AB66EF63F8E7}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{0BAFF894-FC5B-43D1-B09B-AB66EF63F8E7}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{0BAFF894-FC5B-43D1-B09B-AB66EF63F8E7}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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EndGlobal

‎GcodeThumbnailExtension/CgodeThumbnailHandler.cs‎

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using System;
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using System.Drawing;
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using SharpShell.SharpThumbnailHandler;
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using System.IO;
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using System.Drawing.Imaging;
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using System.Drawing.Text;
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using System.Text;
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using System.Runtime.InteropServices;
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using SharpShell.Attributes;
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namespace GcodeThumbnailExtension
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{
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[ComVisible(true)]
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[COMServerAssociation(AssociationType.FileExtension, ".gcode", ".gco")]
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public class CgodeThumbnailHandler : SharpThumbnailHandler
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{
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protected override Bitmap GetThumbnailImage(uint width)
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{
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// Create a stream reader for the selected item stream
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try
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{
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using (var reader = new StreamReader(SelectedItemStream))
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{
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// Now return a preview from the gcode or error when none present
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return GetThumbnailForGcode(reader, width);
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}
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}
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catch (Exception exception)
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{
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// Log the exception and return null for failure
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LogError("An exception occurred opening the file.", exception);
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return null;
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}
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}
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private Bitmap GetThumbnailForGcode(StreamReader reader, uint width)
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{
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// Create the bitmap dimensions
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var thumbnailSize = new Size((int)width, (int)width);
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// Create the bitmap
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var bitmap = new Bitmap(thumbnailSize.Width, thumbnailSize.Height,
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PixelFormat.Format32bppArgb);
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// Get pre-generated thumbnail from gcode file or error if none found
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Image gcodeThumbnail = ReadThumbnailFromGcode(reader);
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// Create a graphics object to render to the bitmap
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using (var graphics = Graphics.FromImage(bitmap))
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{
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// Set the rendering up for anti-aliasing
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graphics.TextRenderingHint = TextRenderingHint.AntiAlias;
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graphics.DrawImage(gcodeThumbnail, 0, 0, thumbnailSize.Width, thumbnailSize.Height);
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}
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// Return the bitmap
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return bitmap;
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}
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private Image ReadThumbnailFromGcode(StreamReader reader)
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{
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int thumbnailSize = 0;
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int counter = 0, maxCounter = 1000;
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String line = "";
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// locate first thumbnail block in the header
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while ((counter < maxCounter) && !reader.EndOfStream) {
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counter++;
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line = reader.ReadLine();
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if (line.Contains("thumbnail begin"))
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{
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break;
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}
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}
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// if no thumbnail was found in first maxCounter lines then throw error
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if ((counter == maxCounter) || reader.EndOfStream)
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{
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throw new Exception();
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}
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String[] thumbnailMeta = line.Split(' ');
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thumbnailSize = Int32.Parse(thumbnailMeta[thumbnailMeta.Length - 1]);
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StringBuilder thumbnailData = ReadBase64Data(reader);
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byte[] imageBytes = Convert.FromBase64String(thumbnailData.ToString());
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// try to find additional thumbnails in the file (PrusaSlicer seems to order them by ascending resolution)
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try
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{
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Image otherImg = ReadThumbnailFromGcode(reader);
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return otherImg;
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}
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catch (Exception exception)
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{
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// do nothing, we got the previous thumbnail anyway
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}
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using (var ms = new MemoryStream(imageBytes, 0, imageBytes.Length))
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{
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Image image = Image.FromStream(ms, true);
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return image;
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}
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}
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private StringBuilder ReadBase64Data(StreamReader reader)
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{
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StringBuilder res = new StringBuilder(20000);
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String line = reader.ReadLine();
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while ((!line.Contains("thumbnail end")) && !reader.EndOfStream)
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{
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res.Append(line.Trim("; \n".ToCharArray()));
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line = reader.ReadLine();
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}
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// no thumbnail end found, file is damaged or invalid
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if (reader.EndOfStream)
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{
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throw new Exception();
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}
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return res;
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}
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}
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}

‎GcodeThumbnailExtension/GcodeThumbnailExtension.csproj‎

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<?xml version="1.0" encoding="utf-8"?>
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<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
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<PropertyGroup>
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<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
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<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
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<ProjectGuid>{0BAFF894-FC5B-43D1-B09B-AB66EF63F8E7}</ProjectGuid>
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<OutputType>Library</OutputType>
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<AppDesignerFolder>Properties</AppDesignerFolder>
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<RootNamespace>GcodeThumbnailExtension</RootNamespace>
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<AssemblyName>GcodeThumbnailExtension</AssemblyName>
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<TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
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<FileAlignment>512</FileAlignment>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
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<DebugSymbols>true</DebugSymbols>
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<DebugType>full</DebugType>
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<Optimize>false</Optimize>
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<OutputPath>bin\Debug\</OutputPath>
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<DefineConstants>DEBUG;TRACE</DefineConstants>
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<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
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<DebugType>pdbonly</DebugType>
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<Optimize>true</Optimize>
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<OutputPath>bin\Release\</OutputPath>
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<DefineConstants>TRACE</DefineConstants>
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<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
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</PropertyGroup>
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<PropertyGroup>
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<SignAssembly>true</SignAssembly>
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</PropertyGroup>
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<PropertyGroup>
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<AssemblyOriginatorKeyFile>key.snk</AssemblyOriginatorKeyFile>
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</PropertyGroup>
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<ItemGroup>
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<Reference Include="Apex.WinForms, Version=1.6.0.0, Culture=neutral, PublicKeyToken=98d06957926c086d, processorArchitecture=MSIL">
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<HintPath>..\packages\SharpShellTools.2.2.0.0\lib\Apex.WinForms.dll</HintPath>
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<Private>True</Private>
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</Reference>
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<Reference Include="ServerManager, Version=2.2.0.0, Culture=neutral, processorArchitecture=x86">
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<HintPath>..\packages\SharpShellTools.2.2.0.0\lib\ServerManager.exe</HintPath>
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<Private>True</Private>
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</Reference>
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<Reference Include="ServerRegistrationManager, Version=2.7.2.0, Culture=neutral, PublicKeyToken=68bd4561cc3495fc, processorArchitecture=MSIL">
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<HintPath>..\packages\ServerRegistrationManager.2.7.2\lib\net45\ServerRegistrationManager.exe</HintPath>
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<Private>True</Private>
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</Reference>
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<Reference Include="SharpShell, Version=2.2.0.0, Culture=neutral, PublicKeyToken=f14dc899472fe6fb, processorArchitecture=MSIL">
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<HintPath>..\packages\SharpShellTools.2.2.0.0\lib\SharpShell.dll</HintPath>
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<Private>True</Private>
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</Reference>
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<Reference Include="System" />
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<Reference Include="System.Core" />
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<Reference Include="System.Drawing" />
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<Reference Include="System.Windows.Forms" />
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<Reference Include="System.Xml.Linq" />
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<Reference Include="System.Data.DataSetExtensions" />
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<Reference Include="Microsoft.CSharp" />
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<Reference Include="System.Data" />
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<Reference Include="System.Net.Http" />
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<Reference Include="System.Xml" />
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</ItemGroup>
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<ItemGroup>
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<Compile Include="CgodeThumbnailHandler.cs" />
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<Compile Include="Properties\AssemblyInfo.cs" />
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</ItemGroup>
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<ItemGroup>
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<None Include="app.config">
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<SubType>Designer</SubType>
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</None>
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<None Include="key.snk" />
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<None Include="packages.config" />
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</ItemGroup>
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<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
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<!-- To modify your build process, add your task inside one of the targets below and uncomment it.
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Other similar extension points exist, see Microsoft.Common.targets.
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<Target Name="BeforeBuild">
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</Target>
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<Target Name="AfterBuild">
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</Target>
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-->
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</Project>

‎GcodeThumbnailExtension/Properties/AssemblyInfo.cs‎

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using System.Reflection;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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// General Information about an assembly is controlled through the following
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// set of attributes. Change these attribute values to modify the information
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// associated with an assembly.
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[assembly: AssemblyTitle("GcodeThumbnailExtension")]
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[assembly: AssemblyDescription("")]
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[assembly: AssemblyConfiguration("")]
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[assembly: AssemblyCompany("")]
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[assembly: AssemblyProduct("GcodeThumbnailExtension")]
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[assembly: AssemblyCopyright("Copyright © 2020")]
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[assembly: AssemblyTrademark("")]
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[assembly: AssemblyCulture("")]
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// Setting ComVisible to false makes the types in this assembly not visible
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// to COM components. If you need to access a type in this assembly from
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// COM, set the ComVisible attribute to true on that type.
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[assembly: ComVisible(false)]
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// The following GUID is for the ID of the typelib if this project is exposed to COM
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[assembly: Guid("0baff894-fc5b-43d1-b09b-ab66ef63f8e7")]
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// Version information for an assembly consists of the following four values:
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//
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// Major Version
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// Minor Version
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// Build Number
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// Revision
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//
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// You can specify all the values or you can default the Build and Revision Numbers
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// by using the '*' as shown below:
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// [assembly: AssemblyVersion("1.0.*")]
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[assembly: AssemblyVersion("1.0.0.0")]
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[assembly: AssemblyFileVersion("1.0.0.0")]

‎GcodeThumbnailExtension/app.config‎

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<?xml version="1.0" encoding="utf-8"?>
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<configuration>
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<runtime>
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<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
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<dependentAssembly>
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<assemblyIdentity name="SharpShell" publicKeyToken="f14dc899472fe6fb" culture="neutral" />
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<bindingRedirect oldVersion="0.0.0.0-2.2.0.0" newVersion="2.2.0.0" />
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</dependentAssembly>
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</assemblyBinding>
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</runtime>
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</configuration>

‎GcodeThumbnailExtension/key.snk‎

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‎GcodeThumbnailExtension/packages.config‎

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<?xml version="1.0" encoding="utf-8"?>
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<packages>
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<package id="ServerRegistrationManager" version="2.7.2" targetFramework="net452" />
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<package id="SharpShell" version="2.7.2" targetFramework="net452" />
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<package id="SharpShellTools" version="2.2.0.0" targetFramework="net452" />
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</packages>

‎GcodeThumbnailExtension/register.bat‎

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ServerRegistrationManager.exe install GcodeThumbnailExtension.dll -codebase

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