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Added Compress PDF document in .NET sample code
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Samples/Compression/CompressAllTechniques/C#/CompressAllTechniques.cs
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| using System; | ||
| using System.Diagnostics; | ||
| using System.IO; | ||
| using System.Windows.Forms; | ||
| using BitMiracle.Docotic.Pdf; | ||
|
|
||
| namespace BitMiracle.Docotic.Pdf.Samples | ||
| { | ||
| public static class CompressAllTechniques | ||
| { | ||
| public static void Main() | ||
| { | ||
| // NOTE: | ||
| // When used in trial mode, the library imposes some restrictions. | ||
| // Please visit http://bitmiracle.com/pdf-library/trial-restrictions.aspx | ||
| // for more information. | ||
|
|
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| const string originalFile = @"Sample Data\jpeg.pdf"; | ||
| const string compressedFile = "CompressAllTechniques.pdf"; | ||
|
|
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| using (PdfDocument pdf = new PdfDocument(originalFile)) | ||
| { | ||
| // 1. Recompress images | ||
| foreach (PdfPage page in pdf.Pages) | ||
| { | ||
| foreach (PdfPaintedImage painted in page.GetPaintedImages()) | ||
| { | ||
| PdfImage image = painted.Image; | ||
|
|
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| // image that is used as mask or image with attached mask are | ||
| // not good candidates for recompression | ||
| if (image.IsMask || image.Mask != null || image.Width < 8 || image.Height < 8) | ||
| continue; | ||
|
|
||
| // get size of the painted image | ||
| int width = Math.Max(1, (int)painted.Bounds.Width); | ||
| int height = Math.Max(1, (int)painted.Bounds.Height); | ||
|
|
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| if (image.ComponentCount == 1 && image.BitsPerComponent == 1 && | ||
| image.Compression != PdfImageCompression.Group4Fax) | ||
| { | ||
| image.RecompressWithGroup4Fax(); | ||
| } | ||
| else if (width < image.Width || height < image.Height) | ||
| { | ||
| // NOTE: PdfImage.ResizeTo() method is not supported in version for .NET Standard | ||
| if (image.ComponentCount >= 3) | ||
| image.ResizeTo(width, height, PdfImageCompression.Jpeg, 90); | ||
| else | ||
| image.ResizeTo(width, height, PdfImageCompression.Flate, 9); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // 2 Setup save options | ||
| pdf.SaveOptions.Compression = PdfCompression.Flate; | ||
| pdf.SaveOptions.UseObjectStreams = true; | ||
| pdf.SaveOptions.RemoveUnusedObjects = true; | ||
| pdf.SaveOptions.OptimizeIndirectObjects = true; | ||
| pdf.SaveOptions.WriteWithoutFormatting = true; | ||
|
|
||
| // 3. Remove structure information | ||
| pdf.RemoveStructureInformation(); | ||
|
|
||
| // 4. Flatten form fields | ||
| // Controls become uneditable after that | ||
| pdf.FlattenControls(); | ||
|
|
||
| // 5. Clear metadata | ||
| pdf.Metadata.Basic.Clear(); | ||
| pdf.Metadata.DublinCore.Clear(); | ||
| pdf.Metadata.MediaManagement.Clear(); | ||
| pdf.Metadata.Pdf.Clear(); | ||
| pdf.Metadata.RightsManagement.Clear(); | ||
|
|
||
| pdf.Metadata.Custom.Properties.Clear(); | ||
|
|
||
| foreach (XmpSchema schema in pdf.Metadata.Schemas) | ||
| schema.Properties.Clear(); | ||
|
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| pdf.Info.Clear(false); | ||
|
|
||
| // 6. Unembed fonts | ||
| foreach (PdfFont font in pdf.GetFonts()) | ||
| { | ||
| // Only unembed popular fonts installed in the typical OS. You can extend | ||
| // the list of such fonts in the "if" statement below. | ||
| if (font.Name == "Arial" || font.Name == "Verdana") | ||
| font.Unembed(); | ||
| } | ||
|
|
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| pdf.Save(compressedFile); | ||
| } | ||
|
|
||
| string message = string.Format( | ||
| "Original file size: {0} bytes;\r\nCompressed file size: {1} bytes", | ||
| new FileInfo(originalFile).Length, | ||
| new FileInfo(compressedFile).Length | ||
| ); | ||
| MessageBox.Show(message); | ||
|
|
||
| Process.Start(compressedFile); | ||
| } | ||
| } | ||
| } |
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Samples/Compression/CompressAllTechniques/C#/CompressAllTechniques.csproj
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| <?xml version="1.0" encoding="utf-8"?> | ||
| <Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> | ||
| <PropertyGroup> | ||
| <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration> | ||
| <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform> | ||
| <ProductVersion>8.0.30703</ProductVersion> | ||
| <SchemaVersion>2.0</SchemaVersion> | ||
| <ProjectGuid>{80675702-2670-4AA4-B474-EADBD35320B8}</ProjectGuid> | ||
| <OutputType>Exe</OutputType> | ||
| <RootNamespace>BitMiracle.Docotic.Pdf.Samples</RootNamespace> | ||
| <AssemblyName>CompressAllTechniques</AssemblyName> | ||
| <TargetFrameworkVersion>v4.0</TargetFrameworkVersion> | ||
| <FileAlignment>512</FileAlignment> | ||
| <TargetFrameworkProfile /> | ||
| </PropertyGroup> | ||
| <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "> | ||
| <DebugSymbols>true</DebugSymbols> | ||
| <DebugType>full</DebugType> | ||
| <Optimize>false</Optimize> | ||
| <OutputPath>bin\Debug\</OutputPath> | ||
| <DefineConstants>DEBUG;TRACE</DefineConstants> | ||
| <ErrorReport>prompt</ErrorReport> | ||
| <WarningLevel>4</WarningLevel> | ||
| </PropertyGroup> | ||
| <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' "> | ||
| <DebugType>pdbonly</DebugType> | ||
| <Optimize>true</Optimize> | ||
| <OutputPath>bin\Release\</OutputPath> | ||
| <DefineConstants>TRACE</DefineConstants> | ||
| <ErrorReport>prompt</ErrorReport> | ||
| <WarningLevel>4</WarningLevel> | ||
| </PropertyGroup> | ||
| <ItemGroup> | ||
| <Reference Include="BitMiracle.Docotic.Pdf" /> | ||
| <Reference Include="System" /> | ||
| <Reference Include="System.Data" /> | ||
| <Reference Include="System.Drawing" /> | ||
| <Reference Include="System.Windows.Forms" /> | ||
| <Reference Include="System.Xml" /> | ||
| </ItemGroup> | ||
| <ItemGroup> | ||
| <Compile Include="CompressAllTechniques.cs" /> | ||
| </ItemGroup> | ||
| <ItemGroup> | ||
| <Content Include="..\..\..\Sample Data\jpeg.pdf"> | ||
| <Link>Sample Data\jpeg.pdf</Link> | ||
| <CopyToOutputDirectory>Always</CopyToOutputDirectory> | ||
| </Content> | ||
| </ItemGroup> | ||
| <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" /> | ||
| <!-- To modify your build process, add your task inside one of the targets below and uncomment it. | ||
| Other similar extension points exist, see Microsoft.Common.targets. | ||
| <Target Name="BeforeBuild"> | ||
| </Target> | ||
| <Target Name="AfterBuild"> | ||
| </Target> | ||
| --> | ||
| </Project> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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| # Compress PDF document in .NET | ||
| This sample shows how to optimize size of an existing PDF document using Docotic.Pdf. | ||
|
|
||
| NOTE: To get proper results please use this sample code with a license key. You can get a free license key here: | ||
| http://bitmiracle.com/pdf-library/download-pdf-library.aspx | ||
|
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||
| Docotic.Pdf supports different compression methods. You can use all of them to get the best compression ratio: | ||
| 1. recompress images (if any) | ||
| 2. setup save options | ||
| 3. remove structure information | ||
| 4. flatten form fields | ||
| 5. remove metadata | ||
| 6. unembed fonts |
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Samples/Compression/CompressAllTechniques/VB.NET/CompressAllTechniques.vb
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|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| Imports System | ||
| Imports System.Diagnostics | ||
| Imports System.IO | ||
| Imports System.Windows.Forms | ||
|
|
||
| Imports Microsoft.VisualBasic | ||
|
|
||
| Imports BitMiracle.Docotic.Pdf | ||
|
|
||
| Namespace BitMiracle.Docotic.Pdf.Samples | ||
| Public NotInheritable Class CompressAllTechniques | ||
| Public Shared Sub Main() | ||
| ' NOTE: | ||
| ' When used in trial mode, the library imposes some restrictions. | ||
| ' Please visit http://bitmiracle.com/pdf-library/trial-restrictions.aspx | ||
| ' for more information. | ||
|
|
||
| Const originalFile As String = "Sample Data\jpeg.pdf" | ||
| Const compressedFile As String = "CompressAllTechniques.pdf" | ||
|
|
||
| Using pdf As New PdfDocument(originalFile) | ||
| ' 1. Recompress images | ||
| For Each page As PdfPage In pdf.Pages | ||
| For Each painted As PdfPaintedImage In page.GetPaintedImages() | ||
| Dim image As PdfImage = painted.Image | ||
|
|
||
| ' image that is used as mask or image with attached mask are | ||
| ' not good candidates for recompression | ||
| If image.IsMask OrElse image.Mask IsNot Nothing OrElse image.Width < 8 OrElse image.Height < 8 Then | ||
| Continue For | ||
| End If | ||
|
|
||
| ' get size of the painted image | ||
| Dim width As Integer = Math.Max(1, CInt(painted.Bounds.Width)) | ||
| Dim height As Integer = Math.Max(1, CInt(painted.Bounds.Height)) | ||
|
|
||
| If image.ComponentCount = 1 AndAlso image.BitsPerComponent = 1 AndAlso image.Compression <> PdfImageCompression.Group4Fax Then | ||
| image.RecompressWithGroup4Fax() | ||
| ElseIf width < image.Width OrElse height < image.Height Then | ||
| ' NOTE: PdfImage.ResizeTo() method is not supported in version for .NET Standard | ||
| If image.ComponentCount = 3 Then | ||
| image.ResizeTo(width, height, PdfImageCompression.Jpeg, 90) | ||
| Else | ||
| image.ResizeTo(width, height, PdfImageCompression.Flate, 9) | ||
| End If | ||
| End If | ||
| Next | ||
| Next | ||
|
|
||
| ' 2 Setup save options | ||
| pdf.SaveOptions.Compression = PdfCompression.Flate | ||
| pdf.SaveOptions.UseObjectStreams = True | ||
| pdf.SaveOptions.RemoveUnusedObjects = True | ||
| pdf.SaveOptions.OptimizeIndirectObjects = True | ||
| pdf.SaveOptions.WriteWithoutFormatting = True | ||
|
|
||
| ' 3. Remove structure information | ||
| pdf.RemoveStructureInformation() | ||
|
|
||
| ' 4. Flatten form fields | ||
| ' Controls become uneditable after that | ||
| pdf.FlattenControls() | ||
|
|
||
| ' 5. Clear metadata | ||
| pdf.Metadata.Basic.Clear() | ||
| pdf.Metadata.DublinCore.Clear() | ||
| pdf.Metadata.MediaManagement.Clear() | ||
| pdf.Metadata.Pdf.Clear() | ||
| pdf.Metadata.RightsManagement.Clear() | ||
|
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||
| pdf.Metadata.[Custom].Properties.Clear() | ||
|
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||
| For Each schema As XmpSchema In pdf.Metadata.Schemas | ||
| schema.Properties.Clear() | ||
| Next | ||
|
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| pdf.Info.Clear(False) | ||
|
|
||
| ' 6. Unembed fonts | ||
| For Each font As PdfFont In pdf.GetFonts() | ||
| ' Only unembed popular fonts installed in the typical OS. You can extend | ||
| ' the list of such fonts in the "if" statement below. | ||
| If font.Name = "Arial" OrElse font.Name = "Verdana" Then | ||
| font.Unembed() | ||
| End If | ||
| Next | ||
|
|
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| pdf.Save(compressedFile) | ||
| End Using | ||
|
|
||
| Dim message As String = String.Format( | ||
| "Original file size: {0} bytes;" & vbCr & vbLf & "Compressed file size: {1} bytes", | ||
| New FileInfo(originalFile).Length, | ||
| New FileInfo(compressedFile).Length | ||
| ) | ||
| MessageBox.Show(message) | ||
|
|
||
| Process.Start(compressedFile) | ||
| End Sub | ||
| End Class | ||
| End Namespace |
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Samples/Compression/CompressAllTechniques/VB.NET/CompressAllTechniques.vbproj
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| <?xml version="1.0" encoding="utf-8"?> | ||
| <Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> | ||
| <PropertyGroup> | ||
| <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration> | ||
| <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform> | ||
| <ProductVersion>9.0.21022</ProductVersion> | ||
| <SchemaVersion>2.0</SchemaVersion> | ||
| <ProjectGuid>{4F4AEF23-064A-4A40-8136-3750FAE28A31}</ProjectGuid> | ||
| <OutputType>Exe</OutputType> | ||
| <StartupObject>BitMiracle.Docotic.Pdf.Samples.BitMiracle.Docotic.Pdf.Samples.CompressAllTechniques</StartupObject> | ||
| <RootNamespace>BitMiracle.Docotic.Pdf.Samples</RootNamespace> | ||
| <AssemblyName>CompressAllTechniques</AssemblyName> | ||
| <FileAlignment>512</FileAlignment> | ||
| <MyType>Console</MyType> | ||
| <TargetFrameworkVersion>v4.0</TargetFrameworkVersion> | ||
| <OptionExplicit>On</OptionExplicit> | ||
| <OptionCompare>Binary</OptionCompare> | ||
| <OptionStrict>Off</OptionStrict> | ||
| <OptionInfer>On</OptionInfer> | ||
| <TargetFrameworkProfile /> | ||
| </PropertyGroup> | ||
| <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "> | ||
| <DebugSymbols>true</DebugSymbols> | ||
| <DebugType>full</DebugType> | ||
| <DefineDebug>true</DefineDebug> | ||
| <DefineTrace>true</DefineTrace> | ||
| <OutputPath>bin\Debug\</OutputPath> | ||
| <NoWarn>42016,41999,42017,42018,42019,42032,42036,42020,42021,42022</NoWarn> | ||
| </PropertyGroup> | ||
| <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' "> | ||
| <DebugType>pdbonly</DebugType> | ||
| <DefineDebug>false</DefineDebug> | ||
| <DefineTrace>true</DefineTrace> | ||
| <Optimize>true</Optimize> | ||
| <OutputPath>bin\Release\</OutputPath> | ||
| <NoWarn>42016,41999,42017,42018,42019,42032,42036,42020,42021,42022</NoWarn> | ||
| </PropertyGroup> | ||
| <ItemGroup> | ||
| <Reference Include="BitMiracle.Docotic.Pdf"> | ||
| <HintPath>..\..\..\..\BitMiracle.Docotic.Pdf.dll</HintPath> | ||
| </Reference> | ||
| <Reference Include="System" /> | ||
| <Reference Include="System.Data" /> | ||
| <Reference Include="System.Drawing" /> | ||
| <Reference Include="System.Windows.Forms" /> | ||
| <Reference Include="System.Xml" /> | ||
| </ItemGroup> | ||
| <ItemGroup> | ||
| <Import Include="Microsoft.VisualBasic" /> | ||
| <Import Include="System" /> | ||
| <Import Include="System.Collections" /> | ||
| <Import Include="System.Collections.Generic" /> | ||
| <Import Include="System.Data" /> | ||
| <Import Include="System.Diagnostics" /> | ||
| </ItemGroup> | ||
| <ItemGroup> | ||
| <Compile Include="CompressAllTechniques.vb" /> | ||
| </ItemGroup> | ||
| <ItemGroup> | ||
| <Content Include="..\..\..\Sample Data\jpeg.pdf"> | ||
| <Link>Sample Data\jpeg.pdf</Link> | ||
| <CopyToOutputDirectory>Always</CopyToOutputDirectory> | ||
| </Content> | ||
| </ItemGroup> | ||
| <Import Project="$(MSBuildToolsPath)\Microsoft.VisualBasic.targets" /> | ||
| <!-- To modify your build process, add your task inside one of the targets below and uncomment it. | ||
| Other similar extension points exist, see Microsoft.Common.targets. | ||
| <Target Name="BeforeBuild"> | ||
| </Target> | ||
| <Target Name="AfterBuild"> | ||
| </Target> | ||
| --> | ||
| </Project> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,2 +1,6 @@ | ||
| # Compression | ||
| This group contains samples showing how to optimize PDF documents. You can use multiple optimization techniques to reduce size of output PDF files. | ||
| This group contains samples showing how to optimize PDF documents. You can use multiple optimization techniques to reduce size of output PDF files. | ||
|
|
||
| [Compress PDF document in .NET](/Samples/Compression/CompressAllTechniques) | ||
|
|
||
| This sample shows how to optimize size of an existing PDF document using Docotic.Pdf. |
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