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Thursday, 30 March 2023 01:05

C++: Insert Text or Image Watermarks to Word

In Word, a watermark is a semi-transparent text or image that you can place in the background. Typically, watermarks are used to emphasize something important about a document. For example, you can use it to remind the user that the content is confidential or a draft. Or other times, you may want to add a washout mark to include the company logo in the document. In this article, you will learn how to insert text or image watermarks to Word documents in C++ using Spire.Doc for C++.

Insert a Text Watermark to Word in C++
Insert an Image Watermark to Word in C++

Install Spire.Doc for C++

There are two ways to integrate Spire.Doc for C++ into your application. One way is to install it through NuGet, and the other way is to download the package from our website and copy the libraries into your program. Installation via NuGet is simpler and more recommended. You can find more details by visiting the following link.

Integrate Spire.Doc for C++ in a C++ Application

Insert a Text Watermark to Word in C++

Spire.Doc for C++ offers the TextWatermark class to represent a text watermark. The content and appearance of the watermark can be set using the methods under it. Once a text watermark is created, you can apply it to the whole document by using Document->SetWatermark() method. The following are the detailed steps.

Create a Document object.
Load a Word file using Document->LoadFromFile() method.
Create a TextWatermark object.
Se the content and appearance of the watermark using the methods under the TextWatermark object.
Apply the text watermark to the document using Document->SetWatermrak() method.
Save the document using Document->SaveToFile() method.

C++

#include "Spire.Doc.o.h";

using namespace Spire::Doc;
using namespace std;

int main() {

    //Create a Document object
    intrusive_ptr<Document> document = new Document();

    //Load a Word file
    document->LoadFromFile(L"C:\\Users\\Administrator\\Desktop\\sample.docx");

    //Create a TextWatermark object
    intrusive_ptr<TextWatermark> txtWatermark = new TextWatermark();

    //Set the content and format of the text watermark
    txtWatermark->SetText(L"CONFIDENTIAL");
    txtWatermark->SetFontSize(40);
    txtWatermark->SetSemitransparent(90);
    txtWatermark->SetFontName(L"Arial Black");
    txtWatermark->SetColor(Color::GetBlue());
    txtWatermark->SetLayout(WatermarkLayout::Diagonal);

    //Apply the text watermark to the document
    document->SetWatermark(txtWatermark);

    //Save the document
    document->SaveToFile(L"Output/TextWatermark.docx", FileFormat::Docx2013);
    document->Close();
}

C++: Insert Text or Image Watermarks to Word

Insert an Image Watermark to Word in C++

Likewise, an image watermark can be created using PictureWatermark class. Once created, you can apply it to a Word document using Document->SetWatermark() method. Here are the detailed steps.

Create a Document object.
Load a Word file using Document->LoadFromFile() method.
Create a PictureWatermark object.
Set the image and appearance of the watermark using the methods under the PictureWatermark object.
Apply the image watermark to the document using Document->SetWatermrak() method.
Save the document using Document->SaveToFile() method.

C++

#include "Spire.Doc.o.h";

using namespace Spire::Doc;
using namespace std;

int main() {

    //Create a Document object
    intrusive_ptr<Document> document = new Document();

    //Load a Word file
    document->LoadFromFile(L"C:\\Users\\Administrator\\Desktop\\sample.docx");

    //Create a PictureWatermark object
    intrusive_ptr<PictureWatermark> pictureWatermark = new PictureWatermark();

    //Specify image for the watermark
    pictureWatermark->SetPicture(L"C:\\Users\\Administrator\\Desktop\\company-png.png");
    pictureWatermark->SetScaling(100);
    pictureWatermark->SetIsWashout(false);

    //Apply the image watermark to the document
    document->SetWatermark(pictureWatermark);

    //Save the document 
    document->SaveToFile(L"Output/ImageWatermark.docx", FileFormat::Docx2013);
    document->Close();
}

C++: Insert Text or Image Watermarks to Word

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Published in Watermark

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Tuesday, 28 March 2023 01:06

C++: Remove Paragraphs in Word

While editing a Word document, there are numerous reasons to delete certain paragraphs in it. For example, it could be as simple as restructuring the document, or removing incorrect or irrelevant information to ensure document accuracy. In this article, you will learn how to programmatically remove paragraphs in a Word document using Spire.Doc for C++.

Remove All Paragraphs in a Word Document in C++
Remove a Specific Paragraph in a Word Document in C++
Remove Blank Paragraphs in a Word Document in C++

Install Spire.Doc for C++

There are two ways to integrate Spire.Doc for C++ into your application. One way is to install it through NuGet, and the other way is to download the package from our website and copy the libraries into your program. Installation via NuGet is simpler and more recommended. You can find more details by visiting the following link.

Integrate Spire.Doc for C++ in a C++ Application

Remove All Paragraphs in a Word Document in C++

To remove all paragraphs, you need to loop through all sections in a document and then delete all paragraphs in each section using Section->GetParagraphs()->Clear() method. The following are the detailed steps.

Create a Document instance.
Load a Word document using Document->LoadFromFile() method.
Traverse through each section of the document and then remove all paragraphs in the section using Section->GetParagraphs()->Clear() method.
Save the result document using Document->SaveToFile() method.

C++

#include "Spire.Doc.o.h"

using namespace Spire::Doc;

int main() {
 //Specify the input and output file paths
 std::wstring inputFile = L"Data\\sample.docx";
 std::wstring outputFile = L"Output\\RemoveAllParagraphs.docx";

 //Create a Document instance
 intrusive_ptr<Document> document = new Document();

 //Load a Word document from disk
 document->LoadFromFile(inputFile.c_str());

 //Remove paragraphs from every section in the document
 for (int i = 0; i < document->GetSections()->GetCount(); i++)
 {
  intrusive_ptr<Section> section = document->GetSections()->GetItemInSectionCollection(i);
  section->GetParagraphs()->Clear();
 }

 //Save the result document
 document->SaveToFile(outputFile.c_str(), FileFormat::Docx2013);
 document->Close();
}

C++: Remove Paragraphs in Word

Remove a Specific Paragraph in a Word Document in C++

If you find a paragraph that contains duplicate or useless information, Spire.Doc for C++ allows you to delete the specified paragraph using Section->GetParagraphs()->RemoveAt() method. The following are the detailed steps.

Create a Document instance.
Load a Word document using Document->LoadFromFile() method.
Get a specified section of the document using Document->GetSections()->GetItem() method.
Remove a specified paragraph in the section using Section->GetParagraphs()->RemoveAt() method.
Save the result document using Document->SaveToFile() method.

C++

#include "Spire.Doc.o.h"

using namespace Spire::Doc;

int main() {
 //Specify the input and output file paths
 std::wstring inputFile = L"Data\\sample.docx";
 std::wstring outputFile = L"Output\\RemoveSpecificParagraph.docx";

 //Create a Document instance
 intrusive_ptr<Document> document = new Document();

 //Load a Word document from disk
 document->LoadFromFile(inputFile.c_str());

 //Get the first section of the document
 intrusive_ptr<Section> sec = document->GetSections()->GetItemInSectionCollection(0);

 //Remove the third paragraph in the section
 sec->GetParagraphs()->RemoveAt(2);

 //Save the result document
 document->SaveToFile(outputFile.c_str(), FileFormat::Docx2013);
 document->Close();
}

C++: Remove Paragraphs in Word

Remove Blank Paragraphs in a Word Document in C++

When there are many empty paragraphs/lines in a document, it quite necessary to remove them to improve readability. The following are the steps to remove all blank paragraphs/lines in a Word document.

Create a Document instance.
Load a Word document using Document->LoadFromFile() method.
Traverse through all paragraphs in the document and determine whether the paragraph is a blank paragraph.
Remove blank paragraphs from the document using section->GetBody()->GetChildObjects()->Remove() method.
Save the result document using Document->SaveToFile() method.

C++

#include "Spire.Doc.o.h"

using namespace Spire::Doc;

int main() {
 //Specify the input and output file paths
 std::wstring inputFile = L"Data\\Test.docx";
 std::wstring outputFile = L"Output\\RemoveEmptyLines.docx";

 //Create a Document instance
 intrusive_ptr<Document> document = new Document();

 //Load a Word document from disk
 document->LoadFromFile(inputFile.c_str());

 //Traverse each paragraph in the Word document
 for (int i = 0; i < document->GetSections()->GetCount(); i++)
 {
  intrusive_ptr<Section> section = document->GetSections()->GetItemInSectionCollection(i);

  for (int j = 0; j < section->GetBody()->GetChildObjects()->GetCount(); j++)
  {
   intrusive_ptr<DocumentObject> secChildObject = section->GetBody()->GetChildObjects()->GetItem(j);
   if (secChildObject->GetDocumentObjectType() == DocumentObjectType::Paragraph)
   {
    intrusive_ptr<Paragraph> para = Object::Dynamic_cast<Paragraph>(secChildObject);
    std::wstring paraText = para->GetText();

    //Determine if the paragraph is a blank paragraph
    if (paraText.empty())
    {
     //Remove blank paragraphs
     section->GetBody()->GetChildObjects()->Remove(secChildObject);
     j--;
    }
   }

  }
 }

 //Save the result document
 document->SaveToFile(outputFile.c_str(), FileFormat::Docx2013);
 document->Close();
}

C++: Remove Paragraphs in Word

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If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.

Published in Paragraph

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Monday, 27 March 2023 01:27

C++: Create a Fillable Form in Word

Word allows you to create forms that other people can use to input information. Fillable forms are particularly useful when you need to gather data or feedback from many individuals and want to make sure that the formatting is consistent. The tools that you may need for creating a form include:

Content Controls: The areas where users input information in a form.
Tables: Tables are used in forms to align text and form fields, and to create borders and boxes.
Protection: Allows users to populate fields but not to make changes to the rest of the document.

Content controls in Word are containers for content that let users build structured documents. A structured document controls where content appears within the document. There are basically ten types of content controls available in Word 2013. This article focuses on how to create a fillable form in Word consisting of the following seven common content controls using Spire.Doc for C++.

Content Control	Description
Plain Text	A text field limited to plain text, so no formatting can be included.
Rich Text	A text field that can contain formatted text or other items, such as tables, pictures, or other content controls.
Picture	Accepts a single picture.
Drop-Down List	A drop-down list displays a predefined list of items for the user to choose from.
Combo Box	A combo box enables users to select a predefined value in a list or type their own value in the text box of the control.
Check Box	A check box provides a graphical widget that allows the user to make a binary choice: yes (checked) or no (not checked).
Date Picker	Contains a calendar control from which the user can select a date.

Install Spire.Doc for C++

There are two ways to integrate Spire.Doc for C++ into your application. One way is to install it through NuGet, and the other way is to download the package from our website and copy the libraries into your program. Installation via NuGet is simpler and more recommended. You can find more details by visiting the following link.

Integrate Spire.Doc for C++ in a C++ Application

Create a Fillable Form in Word in C++

The StructureDocumentTagInline class provided by Spire.Doc for C++ is used to create structured document tags for inline-level structures (DrawingML object, fields, etc.) in a paragraph. The SDTProperties property and the SDTContent property under this class shall be used to specify the properties and content of the current structured document tag. The following are the detailed steps to create a fillable form with content controls in Word.

Create a Document object.
Add a section using Document->AddSection() method.
Add a table using Section->AddTable() method.
Add a paragraph to a specific table cell using TableCell->AddParagraph() method.
Create an instance of StructureDocumentTagInline class, and add it to the paragraph as a child object using Paragraph->GetChildObjects()->Add() method.
Specify the properties and content of the structured document tag using the methods under the SDTProperties property and the SDTContent property of the StructureDocumentTagInline object. The type of the structured document tag is set through SDTProperties->SetSDTType() method.
Prevent users from editing content outside form fields using Document->Protect() method.
Save the document using Document->SaveToFile() method.

C++

#include "Spire.Doc.o.h";

using namespace Spire::Doc;
using namespace std;

int main() {

    //Create a Document object
    intrusive_ptr<Document> doc = new Document();

    //Add a section
    intrusive_ptr<Section> section = doc->AddSection();

    //add a table
    intrusive_ptr<Table> table = section->AddTable(true);
    table->ResetCells(7, 2);

    //Add text to the cells of the first column
    intrusive_ptr<Paragraph> paragraph = table->GetRows()->GetItemInRowCollection(0)->GetCells()->GetItemInCellCollection(0)->AddParagraph();
    paragraph->AppendText(L"Plain Text Content Control");
    paragraph = table->GetRows()->GetItemInRowCollection(1)->GetCells()->GetItemInCellCollection(0)->AddParagraph();
    paragraph->AppendText(L"Rich Text Content Control");
    paragraph = table->GetRows()->GetItemInRowCollection(2)->GetCells()->GetItemInCellCollection(0)->AddParagraph();
    paragraph->AppendText(L"Picture Content Control");
    paragraph = table->GetRows()->GetItemInRowCollection(3)->GetCells()->GetItemInCellCollection(0)->AddParagraph();
    paragraph->AppendText(L"Drop-Down List Content Control");
    paragraph = table->GetRows()->GetItemInRowCollection(4)->GetCells()->GetItemInCellCollection(0)->AddParagraph();
    paragraph->AppendText(L"Check Box Content Control");
    paragraph = table->GetRows()->GetItemInRowCollection(5)->GetCells()->GetItemInCellCollection(0)->AddParagraph();
    paragraph->AppendText(L"Combo box Content Control");
    paragraph = table->GetRows()->GetItemInRowCollection(6)->GetCells()->GetItemInCellCollection(0)->AddParagraph();
    paragraph->AppendText(L"Date Picker Content Control");

    //Add a plain text content control to the cell (0,1)
    paragraph = table->GetRows()->GetItemInRowCollection(0)->GetCells()->GetItemInCellCollection(1)->AddParagraph();
    intrusive_ptr<StructureDocumentTagInline> sdt = new StructureDocumentTagInline(doc);
    paragraph->GetChildObjects()->Add(sdt);
    sdt->GetSDTProperties()->SetSDTType(SdtType::Text);
    sdt->GetSDTProperties()->SetAlias(L"Plain Text");
    sdt->GetSDTProperties()->SetTag(L"Plain Text");
    sdt->GetSDTProperties()->SetIsShowingPlaceHolder(true);
    intrusive_ptr<SdtText> text = new SdtText(true);
    text->SetIsMultiline(false);
    sdt->GetSDTProperties()->SetControlProperties(text);
    intrusive_ptr<TextRange> tr = new TextRange(doc);
    tr->SetText(L"Click or tap here to enter text.");
    sdt->GetSDTContent()->GetChildObjects()->Add(tr);

    //Add a rich text content control to the cell (1,1)
    paragraph = table->GetRows()->GetItemInRowCollection(1)->GetCells()->GetItemInCellCollection(1)->AddParagraph();
    sdt = new StructureDocumentTagInline(doc);
    paragraph->GetChildObjects()->Add(sdt);
    sdt->GetSDTProperties()->SetSDTType(SdtType::RichText);
    sdt->GetSDTProperties()->SetAlias(L"Rich Text");
    sdt->GetSDTProperties()->SetTag(L"Rich Text");
    sdt->GetSDTProperties()->SetIsShowingPlaceHolder(true);
    text = new SdtText(true);
    text->SetIsMultiline(false);
    sdt->GetSDTProperties()->SetControlProperties(text);
    tr = new TextRange(doc);
    tr->SetText(L"Click or tap here to enter text.");
    sdt->GetSDTContent()->GetChildObjects()->Add(tr);

    //Add a picture content control to the cell (2,1)
    paragraph = table->GetRows()->GetItemInRowCollection(2)->GetCells()->GetItemInCellCollection(1)->AddParagraph();
    sdt = new StructureDocumentTagInline(doc);
    paragraph->GetChildObjects()->Add(sdt);
    sdt->GetSDTProperties()->SetSDTType(SdtType::Picture);
    sdt->GetSDTProperties()->SetAlias(L"Picture");
    sdt->GetSDTProperties()->SetTag(L"Picture");
    intrusive_ptr<SdtPicture> sdtPicture = new SdtPicture();
    sdt->GetSDTProperties()->SetControlProperties(sdtPicture);
    intrusive_ptr<DocPicture> pic = new DocPicture(doc);
    pic->LoadImageSpire(L"C:\\Users\\Administrator\\Desktop\\1.png");
    sdt->GetSDTContent()->GetChildObjects()->Add(pic);

    //Add a dropdown list content control to the cell(3,1)
    paragraph = table->GetRows()->GetItemInRowCollection(3)->GetCells()->GetItemInCellCollection(1)->AddParagraph();
    sdt = new StructureDocumentTagInline(doc);
    sdt->GetSDTProperties()->SetSDTType(SdtType::DropDownList);
    sdt->GetSDTProperties()->SetAlias(L"Dropdown List");
    sdt->GetSDTProperties()->SetTag(L"Dropdown List");
    paragraph->GetChildObjects()->Add(sdt);
    intrusive_ptr<SdtDropDownList> sddl = new SdtDropDownList();
    sddl->GetListItems()->Add(new SdtListItem(L"Choose an item.", L"1"));
    sddl->GetListItems()->Add(new SdtListItem(L"Item 2", L"2"));
    sddl->GetListItems()->Add(new SdtListItem(L"Item 3", L"3"));
    sddl->GetListItems()->Add(new SdtListItem(L"Item 4", L"4"));
    sdt->GetSDTProperties()->SetControlProperties(sddl);
    tr = new TextRange(doc);
    tr->SetText(sddl->GetListItems()->GetItem(0)->GetDisplayText());
    sdt->GetSDTContent()->GetChildObjects()->Add(tr);

    //Add two check box content controls to the cell (4,1)
    paragraph = table->GetRows()->GetItemInRowCollection(4)->GetCells()->GetItemInCellCollection(1)->AddParagraph();
    sdt = new StructureDocumentTagInline(doc);
    paragraph->GetChildObjects()->Add(sdt);
    sdt->GetSDTProperties()->SetSDTType(SdtType::CheckBox);
    intrusive_ptr<SdtCheckBox> scb = new SdtCheckBox();
    sdt->GetSDTProperties()->SetControlProperties(scb);
    tr = new TextRange(doc);
    sdt->GetChildObjects()->Add(tr);
    scb->SetChecked(false);
    paragraph->AppendText(L" Option 1");

    paragraph = table->GetRows()->GetItemInRowCollection(4)->GetCells()->GetItemInCellCollection(1)->AddParagraph();
    sdt = new StructureDocumentTagInline(doc);
    paragraph->GetChildObjects()->Add(sdt);
    sdt->GetSDTProperties()->SetSDTType(SdtType::CheckBox);
    scb = new SdtCheckBox();
    sdt->GetSDTProperties()->SetControlProperties(scb);
    tr = new TextRange(doc);
    sdt->GetChildObjects()->Add(tr);
    scb->SetChecked(false);
    paragraph->AppendText(L" Option 2");

    //Add a combo box content control to the cell (5,1)
    paragraph = table->GetRows()->GetItemInRowCollection(5)->GetCells()->GetItemInCellCollection(1)->AddParagraph();
    sdt = new StructureDocumentTagInline(doc);
    paragraph->GetChildObjects()->Add(sdt);
    sdt->GetSDTProperties()->SetSDTType(SdtType::ComboBox);
    sdt->GetSDTProperties()->SetAlias(L"Combo Box");
    sdt->GetSDTProperties()->SetTag(L"Combo Box");
    intrusive_ptr<SdtComboBox> cb = new SdtComboBox();
    cb->GetListItems()->Add(new SdtListItem(L"Choose an item."));
    cb->GetListItems()->Add(new SdtListItem(L"Item 2"));
    cb->GetListItems()->Add(new SdtListItem(L"Item 3"));
    sdt->GetSDTProperties()->SetControlProperties(cb);
    tr = new TextRange(doc);
    tr->SetText(cb->GetListItems()->GetItem(0)->GetDisplayText());
    sdt->GetSDTContent()->GetChildObjects()->Add(tr);

    //Add a date picker content control to the cell (6,1)
    paragraph = table->GetRows()->GetItemInRowCollection(6)->GetCells()->GetItemInCellCollection(1)->AddParagraph();
    sdt = new StructureDocumentTagInline(doc);
    paragraph->GetChildObjects()->Add(sdt);
    sdt->GetSDTProperties()->SetSDTType(SdtType::DatePicker);
    sdt->GetSDTProperties()->SetAlias(L"Date Picker");
    sdt->GetSDTProperties()->SetTag(L"Date Picker");
    intrusive_ptr<SdtDate> date = new SdtDate();
    date->SetCalendarType(CalendarType::Default);
    date->SetDateFormatSpire(L"yyyy.MM.dd");
    date->SetFullDate(DateTime::GetNow());
    sdt->GetSDTProperties()->SetControlProperties(date);
    tr = new TextRange(doc);
    tr->SetText(L"Click or tap to enter a date.");
    sdt->GetSDTContent()->GetChildObjects()->Add(tr);

    //Allow users to edit the form fields only
    doc->Protect(ProtectionType::AllowOnlyFormFields, L"permission-psd");

    //Save to file
    doc->SaveToFile(L"Output/WordForm.docx", FileFormat::Docx2013);
    doc->Close();
}

C++: Create a Fillable Form in Word

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If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.

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Friday, 24 March 2023 01:08

C++: Insert Images into Word Documents

Images can add visual variety to documents and convey information that is hard to express through text alone, such as complex concepts or emotions. They are a powerful tool to make your document easier to understand, more engaging, and more memorable. Whether you are designing a report or creating a marketing document, inserting images can enhance your communication with your readers and leave a lasting impression on them. In this article, you will learn how to insert images into Word documents in C++ using Spire.Doc for C++.

Insert an Image in a Word Document in C++
Insert an Image at a Specified Location in a Word Document in C++

Install Spire.Doc for C++

There are two ways to integrate Spire.Doc for C++ into your application. One way is to install it through NuGet, and the other way is to download the package from our website and copy the libraries into your program. Installation via NuGet is simpler and more recommended. You can find more details by visiting the following link.

Integrate Spire.Doc for C++ in a C++ Application

Insert an Image in a Word Document in C++

Spire.Doc for C++ offers the Paragraph->AppendPicture() method to insert an image into a Word document. The detailed steps are as follows:

Initialize an instance of the Document class.
Add a section using Document->AddSection() method.
Add two paragraphs to the section using Section->AddParagraph() method.
Add text to the paragraphs using Paragraph->AppendText() method and set formatting.
Load an image using Image::FromFile() method.
Add the image to the first paragraph using Paragraph->AppendPicture() method.
Set width and height for the image using DocPicture->SetWidth() and DocPicture->SetHeight() methods.
Set a text wrapping style for the image using DocPicture->SetTextWrappingStyle() method.
Save the result document using Document->SaveToFile() method.

C++

#include "Spire.Doc.o.h"

using namespace Spire::Doc;

int main()
{
 //Initialize an instance of the Document class
 intrusive_ptr<Document> document = new Document();

 //Add a section
 intrusive_ptr<Section> section = document->AddSection();

 //Add the first paragraph
 intrusive_ptr<Paragraph> paragraph1 = section->AddParagraph();
 //Add text to the paragraph and set formatting
 intrusive_ptr <TextRange> tr = paragraph1->AppendText(L"Spire.Doc for C++ is a professional Word library specifically designed for developers to create, read, write, convert, merge, split, and compare Word documents in C++ applications with fast and high-quality performance.");
 tr->GetCharacterFormat()->SetFontName(L"Calibri");
 tr->GetCharacterFormat()->SetFontSize(11.0f);
 paragraph1->GetFormat()->SetLineSpacing(20.0f);
 paragraph1->GetFormat()->SetAfterSpacing(10.0f);

 //Add the second paragraph
 intrusive_ptr<Paragraph> paragraph2 = section->AddParagraph();
 //Add text to the paragraph and set formatting
 tr = paragraph2->AppendText(L"Almost all Word document elements are supported by Spire.Doc for C++, including pages, sections, headers, footers, digital signatures, footnotes, paragraphs, lists, tables, text, fields, hyperlinks, bookmarks, comments, images, style, background settings, document settings and protection. Furthermore, drawing objects including shapes, textboxes, images, OLE objects, Latex Math Symbols, MathML Code and controls are supported as well.");
 tr->GetCharacterFormat()->SetFontName(L"Calibri");
 tr->GetCharacterFormat()->SetFontSize(11.0f);
 paragraph2->GetFormat()->SetLineSpacing(20.0f);

 //Add the image to the first paragraph
 intrusive_ptr<DocPicture> picture = paragraph1->AppendPicture(L"Spire.Doc.png");
 //Set image width and height
 picture->SetWidth(100);
 picture->SetHeight(100);
 //Set text wrapping style for the image
 picture->SetTextWrappingStyle(TextWrappingStyle::Tight);

 //Save the result document
 document->SaveToFile(L"InsertImage.docx", FileFormat::Docx2013);
 document->Close();
}

C++: Insert Images into Word Documents

Insert an Image at a Specified Location in a Word document in C++

Spire.Doc for C++ enables you to insert an image into a Word document and set its position by using the DocPicture->SetHorizontalPosition() and DocPicture->SetVerticalPosition() methods. The detailed steps are as follows:

Initialize an instance of the Document class.
Add a section using Document->AddSection() method.
Add a paragraph to the section using Section->AddParagraph() method.
Add text to the paragraph using Paragraph->AppendText() method and set formatting.
Load an image using Image::FromFile() method.
Add the image to the paragraph using Paragraph->AppendPicture() method.
Set width and height for the image using DocPicture->SetWidth() and DocPicture->SetHeight() methods.
Set the horizontal position and vertical position for the image using DocPicture->SetHorizontalPosition() and DocPicture->SetVerticalPosition() methods.
Set a text wrapping style for the image using DocPicture->SetTextWrappingStyle() method (note that the position settings are not applicable when the text wrapping style is Inline).
Save the result document using Document->SaveToFile() method.

C++

#include "Spire.Doc.o.h"

using namespace Spire::Doc;

int main()
{
 //Initialize an instance of the Document class
 intrusive_ptr<Document> document = new Document();

 //Add a section
 intrusive_ptr<Section> section = document->AddSection();

 //Add a paragraph to the section
 intrusive_ptr<Paragraph> paragraph = section->AddParagraph();

 //Add text to the paragraph and set formatting
 intrusive_ptr<TextRange> tr = paragraph->AppendText(L"The sample demonstrates how to insert an image at a specified location in a Word document.");
 tr->GetCharacterFormat()->SetFontName(L"Calibri");
 paragraph->ApplyStyle(BuiltinStyle::Heading2);

 //Add the image to the paragraph
 intrusive_ptr<DocPicture> picture = paragraph->AppendPicture(L"Spire.Doc.png");

 //Set image size
 picture->SetWidth(100);
 picture->SetHeight(100);

 //Set image position
 picture->SetHorizontalPosition(180.0F);
 picture->SetVerticalPosition(60.0F);

 //Set a text wrapping style for the image (note that the position settings are not applicable when the text wrapping style is Inline)
 picture->SetTextWrappingStyle(TextWrappingStyle::Through);

 //Save the result document
 document->SaveToFile(L"InsertImageAtSpecifiedLocation.docx", FileFormat::Docx);
 document->Close();
}

C++: Insert Images into Word Documents

Apply for a Temporary License

If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.

Published in Image and Shape

Tagged under

Thursday, 23 March 2023 00:57

C++: Convert PowerPoint Presentations to Images (JPG, PNG, SVG)

Converting PowerPoint presentations to images brings you multiple benefits. For example, it makes it easy for you to share the content with others who may not have access to PowerPoint software; it preserves the formatting of the original presentation, ensuring that the content appears exactly as intended; and it protects the content in the presentation from being edited or modified by others. In this article, you will learn how to convert a PowerPoint Presentation to different image formats in C++ using Spire.Presentation for C++.

Convert PowerPoint Presentation to JPG or PNG Images
Convert PowerPoint Presentation to JPG or PNG Images with Specific Size
Convert PowerPoint Presentation to SVG Images

Install Spire.Presentation for C++

There are two ways to integrate Spire.Presentation for C++ into your application. One way is to install it through NuGet, and the other way is to download the package from our website and copy the libraries into your program. Installation via NuGet is simpler and more recommended. You can find more details by visiting the following link.

Integrate Spire.Presentation for C++ in a C++ Application

Convert PowerPoint Presentation to JPG or PNG Images in C++

Spire.Presentation for C++ offers the ISlide->SaveAsImage() method which enables you to convert the slides in a PowerPoint presentation to JPG or PNG images. The detailed steps are as follows:

Initialize an instance of the Presentation class.
Load a PowerPoint presentation using Presentation->LoadFromFile() method.
Access the slide collection of the presentation using Presentation->GetSlides() method.
Iterate through the slides in the collection.
Save each slide to an image stream using ISlide->SaveAsImage() method.
Save the image stream to a JPG or PNG file using Stream->Save() method.

C++

#include "Spire.Presentation.o.h";

using namespace Spire::Presentation;
using namespace std;

int main()
{

	//Initialize an instance of the Presentation class
	intrusive_ptr⁢Presentation> ppt = new Presentation();

	//Load a PowerPoint presentation
	ppt->LoadFromFile(L"Sample.pptx");

	//Get the slide collection of the presentation
	intrusive_ptr⁢SlideCollection> slides = ppt->GetSlides();

	//Iterate through the slides in the collection
	for (int i = 0; i < slides->GetCount(); i++)
	{
		intrusive_ptr⁢ISlide> slide = slides->GetItem(i);

		//Save each slide to a PNG image
		intrusive_ptr⁢Stream> image = slide->SaveAsImage();
		image->Save((L"Images\\ToImage_img_" + to_wstring(i) + L".png").c_str());
	}

	ppt->Dispose();
}

C++: Convert PowerPoint Presentations to Images (JPG, PNG, SVG)

Convert PowerPoint Presentation to JPG or PNG Images with Specific Size in C++

You can convert the slides in a PowerPoint presentation to JPG or PNG images with a specific size using ISlide->SaveAsImage(int width, int height) method. The detailed steps are as follows:

Initialize an instance of the Presentation class.
Load a PowerPoint presentation using Presentation->LoadFromFile() method.
Access the slide collection of the presentation using Presentation->GetSlides() method.
Iterate through the slides in the collection.
Save each slide to an image stream using ISlide->SaveAsImage(int width, int height) method.
Save the image stream to a JPG or PNG file using Stream->Save() method.

C++

#include "Spire.Presentation.o.h";

using namespace Spire::Presentation;
using namespace std;

int main()
{
	//Initialize an instance of the Presentation class
	intrusive_ptr⁢Presentation> ppt = new Presentation();

	//Load a PowerPoint presentation
	ppt->LoadFromFile(L"Sample.pptx");

	//Get the slide collection of the presentation
	intrusive_ptr⁢SlideCollection> slides = ppt->GetSlides();

	//Iterate through the slides in the collection
	for (int i = 0; i < slides->GetCount(); i++)
	{
		intrusive_ptr⁢ISlide> slide = slides->GetItem(i);
		//Save each slide to a PNG image with a size of 600 x 400 pixels
		intrusive_ptr⁢Stream> image = slide->SaveAsImage(600, 400);
		image->Save((L"ImagesWithSpecificSize\\ToImage_img_" + to_wstring(i) + L".png").c_str());
	}

	ppt->Dispose();
}

C++: Convert PowerPoint Presentations to Images (JPG, PNG, SVG)

Convert PowerPoint Presentation to SVG Images in C++

To convert the slides in a PowerPoint presentation to SVG images, you can use the ISlide->SaveToSVG() method. The detailed steps are as follows:

Initialize an instance of the Presentation class.
Load a PowerPoint presentation using Presentation->LoadFromFile() method.
Access the slide collection of the presentation using Presentation->GetSlides() method.
Iterate through the slides in the collection.
Save each slide to an SVG stream using ISlide->SaveToSVG() method.
Save the SVG stream to an SVG file using Stream->Save() method.

C++

#include "Spire.Presentation.o.h";

using namespace Spire::Presentation;
using namespace std;

int main()
{
	//Initialize an instance of the Presentation class
	intrusive_ptr⁢Presentation> ppt = new Presentation();

	//Load a PowerPoint presentation
	ppt->LoadFromFile(L"Sample.pptx");

	//Get the slide collection of the presentation
	intrusive_ptr⁢SlideCollection> slides = ppt->GetSlides();

	//Set whether to retain notes while converting PowerPoint to SVG
	ppt->SetIsNoteRetained(true);

	//Iterate through the slides in the collection
	for (int i = 0; i < slides->GetCount(); i++)
	{
		intrusive_ptr⁢ISlide> slide = slides->GetItem(i);

		//Save each slide to an SVG image
		intrusive_ptr⁢Stream> svg = slide->SaveToSVG();
		svg->Save((L"SvgImages\\ToSVG-" + to_wstring(i) + L".svg").c_str());
	}

	ppt->Dispose();
}

C++: Convert PowerPoint Presentations to Images (JPG, PNG, SVG)

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Tagged under

ppt cpp Conversion

Wednesday, 22 March 2023 00:52

C++: Add or Delete Pages in PDF

When you are handling a PDF document with lots of pages, you will most likely need to add new pages to include more information or remove some redundant pages. In this article, you will learn how to programmatically add or delete pages in a PDF document using Spire.PDF for C++.

Add a Blank Page at the End of a PDF Document in C++
Insert a Blank Page After a Specific Page in PDF in C++
Delete an Existing Page in a PDF Document in C++

Install Spire.PDF for C++

There are two ways to integrate Spire.PDF for C++ into your application. One way is to install it through NuGet, and the other way is to download the package from our website and copy the libraries into your program. Installation via NuGet is simpler and more recommended. You can find more details by visiting the following link.

Integrate Spire.PDF for C++ in a C++ Application

Add a Blank Page at the End of a PDF Document in C++

Spire.PDF for C++ allows you to add an empty page with specific size and margins at the end of the document using PdfDocument->GetPages()->Add(SizeF* size, PdfMargins* margins) method. The following are the detailed steps.

Create a PdfDocument object.
Load a sample PDF document using PdfDocument->LoadFromFile() method.
Create an empty page with the specified size and margins and then append it to the end of the document using PdfDocument->GetPages()->Add(SizeF* size, PdfMargins* margins) method.
Save the result document using PdfDocument->SaveToFile () method.

C++

#include "Spire.Pdf.o.h"

using namespace Spire::Pdf;
using namespace std;

int main() {
	//Specify input and output file paths
	wstring inputFile = L"Data\\input.pdf";
	wstring outputFile = L"Output\\InsertEmptyPageAtEnd.pdf";

	//Create a PdfDocument object
	PdfDocument* pdf = new PdfDocument();

	//Load a PDF document 
	pdf->LoadFromFile(inputFile.c_str());

	//Add an empty page at the end of the document
	PdfMargins tempVar(0, 0);
	pdf->GetPages()->Add(new SizeF(PdfPageSize::A4()), &tempVar);

	//Save the result document
	pdf->SaveToFile(outputFile.c_str());
	pdf->Close();

	delete pdf;
}

C++: Add or Delete Pages in PDF

Insert a Blank Page After a Specific Page in PDF in C++

If you want to insert an empty page into a specific position of a PDF document, you can use the PdfDocument->GetPages()->Insert(int index) method. The following are the detailed steps.

Create a PdfDocument object.
Load a sample PDF document using PdfDocument->LoadFromFile() method.
Create a blank page and insert it after a specified PDF page using PdfDocument->GetPages()->Insert(int index) method.
Save the result document using PdfDocument->SaveToFile () method.

C++

#include "Spire.Pdf.o.h"

using namespace Spire::Pdf;
using namespace std;

int main() {
	//Specify input and output file paths
	wstring inputFile = L"Data\\input.pdf";
	wstring outputFile = L"Output\\InsertEmptyPage.pdf";

	//Create a PdfDocument object
	PdfDocument* pdf = new PdfDocument();

	//Load a PDF document 
	pdf->LoadFromFile(inputFile.c_str());

	//Insert a blank page as the second page
	pdf->GetPages()->Insert(1);

	//Save the result document
	pdf->SaveToFile(outputFile.c_str());
	pdf->Close();

	delete pdf;
}

C++: Add or Delete Pages in PDF

Delete an Existing Page in a PDF Document in C++

For PDF pages containing useless information, you can also remove them using Spire.PDF for C++. The following are the steps to delete a specific page in PDF.

Create a PdfDocument object.
Load a sample PDF document using PdfDocument->LoadFromFile() method.
Remove a specified page from the document using PdfDocument->GetPages()->RemoveAt(int index) method.
Save the result document using PdfDocument->SaveToFile () method.

C++

#include "Spire.Pdf.o.h"

using namespace Spire::Pdf;
using namespace std;

int main() {
	//Specify input and output file paths
	wstring inputFile = L"Data\\input.pdf";
	wstring outputFile = L"Output\\DeletePage.pdf";

	//Create a PdfDocument object
	PdfDocument* pdf = new PdfDocument();

	//Load a PDF document 
	pdf->LoadFromFile(inputFile.c_str());

	//Delete the first page in the document
	pdf->GetPages()->RemoveAt(0);

	//Save the result document
	pdf->SaveToFile(outputFile.c_str());
	pdf->Close();

	delete pdf;
}

C++: Add or Delete Pages in PDF

Apply for a Temporary License

If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.

Published in Page Setting

Tagged under

pdf cpp Page Setting

Monday, 20 March 2023 00:56

C++: Find and Replace Text in Word Documents

The find and replace feature in Microsoft Word is an essential tool when editing documents. It enables you to quickly find a specific word or phrase in a Word document and lets you replace all instances of it at once. This is especially helpful in situations where you need to update information or correct misspelled words in large Word documents. In this article, you will learn how to find and replace text in Word documents in C++ using Spire.Doc for C++.

Find Text and Replace All Its Instances with New Text
Find Text and Replace Its First Instance with New Text
Find and Replace Text Using a Regular Expression
Find and Replace Text with an Image

Install Spire.Doc for C++

There are two ways to integrate Spire.Doc for C++ into your application. One way is to install it through NuGet, and the other way is to download the package from our website and copy the libraries into your program. Installation via NuGet is simpler and more recommended. You can find more details by visiting the following link.

Integrate Spire.Doc for C++ in a C++ Application

Find Text and Replace All Its Instances with New Text

You can find a text and replace all its instances with another text easily using the Document->Replace() method. The detailed steps are as follows:

Initialize an instance of the Document class.
Load a Word document using Document->LoadFromFile() method.
Find a specific text and replace all its instances with another text using Document->Replace() method.
Save the result document using Document->SaveToFile() method.

C++

#include "Spire.Doc.o.h"

using namespace Spire::Doc;
using namespace std;

int main()
{
 //Initialize an instance of the Document class
 intrusive_ptr<Document> document = new Document();

 //Load a Word document
 document->LoadFromFile(L"Input.docx");

 //Find a specific text and replace all its instances with another text
 document->Replace(L"Spire.Doc", L"Eiceblue", false, true);

 //Save the result document
 document->SaveToFile(L"ReplaceAllInstances.docx", FileFormat::Docx2013);
 document->Close();
}

C++: Find and Replace Text in Word Documents

Find Text and Replace Its First Instance with New Text

Spire.Doc for C++ provides the Document->SetReplaceFirst() method which enables you to change the replacement mode from replacing all instances to replacing the first instance. The following steps explain how to find a text and replace its first instance:

Initialize an instance of the Document class.
Load a Word document using Document->LoadFromFile() method.
Change the replacement mode to replace the first instance using Document->SetReplaceFirst(true) method.
Replace the first instance of a text with another text using Document->Replace() method.
Save the result document using Document->SaveToFile() method.

C++

#include "Spire.Doc.o.h"

using namespace Spire::Doc;
using namespace std;

int main()
{
 //Initialize an instance of the Document class
 intrusive_ptr<Document> document = new Document();

 //Load a Word document
 document->LoadFromFile(L"Input.docx");

 //Change the replacement mode to replace the first match
 document->SetReplaceFirst(true);

 //Replace the first instance of a text with another text
 document->Replace(L"Spire.Doc", L"Eiceblue", false, true);

 //Save the result document
 document->SaveToFile(L"ReplaceFirstInstance.docx", FileFormat::Docx2013);
 document->Close();
}

C++: Find and Replace Text in Word Documents

Find and Replace Text Using a Regular Expression

You can replace a text matching a regular expression with new text using the Document->Replace() method and passing a Regex instance and the new text to the method as parameters. The detailed steps are as follows:

Initialize an instance of the Document class.
Load a Word document using Document->LoadFromFile() method.
Initialize an instance of the Regex class to create a regular expression.
Find the text matching the regex and replace it with another text using Document->Replace() method.
Save the result document using Document->SaveToFile() method.

C++

#include "Spire.Doc.o.h"

using namespace Spire::Doc;
using namespace std;

int main()
{
 //Initialize an instance of the Document class
 intrusive_ptr<Document> doc = new Document();
 //Load a Word document
 doc->LoadFromFile(L"Input1.docx");

 //Create a regex to match the text that starts with #
 intrusive_ptr<Regex> regex = new Regex(L"\\#\\w+\\b");

 //Find the text matching the regex and replace it with another text
 doc->Replace(regex, L"Monitor");

 //Save the result document
 doc->SaveToFile(L"ReplaceWithRegex.docx", FileFormat::Docx2013);
 doc->Close();;
}

C++: Find and Replace Text in Word Documents

Find and Replace Text with an Image

Spire.Doc for C++ doesn't offer a direct method to replace text with image, but you can achieve this by inserting the image at the position of the text and then removing the text from the document. The detailed steps are as follows:

Initialize an instance of the Document class.
Load a Word document using Document->LoadFromFile() method.
Find a specific text using Document->FindAllString() method and put the found text into a vector.
Iterate through the found text in the vector.
Initialize an instance of DocPicture class and load an image using DocPicture->LoadImageSpire() method.
Get the found text as a single text range and then get the index of the text range in its owner paragraph.
Insert an image at the position of the text range and then remove the text range from the document.
Save the result document using Document->SaveToFile() method.

C++

#include "Spire.Doc.o.h"

using namespace Spire::Doc;
using namespace std;

int main()
{
 //Initialize an instance of the Document class
 intrusive_ptr<Document> doc = new Document();

 //Load a Word document
 doc->LoadFromFile(L"Input.docx");

 //Find a text in the document and put the found results into a vector
 vector<intrusive_ptr<TextSelection>> selections = doc->FindAllString(L"Spire.Doc", true, true);

 int index = 0;
 intrusive_ptr<TextRange> range = nullptr;

 //Iterate through the found text in the vector
 for (auto selection : selections)
 {
  //Load an image
  intrusive_ptr<DocPicture> pic = new DocPicture(doc);
  pic->LoadImageSpire(L"img.jpg");
  //Get the found text as a single text range
  range = selection->GetAsOneRange();
  //Get the index of the text range in its owner paragraph
  index = range->GetOwnerParagraph()->GetChildObjects()->IndexOf(range);
  //Insert an image at the index
  range->GetOwnerParagraph()->GetChildObjects()->Insert(index, pic);
  //Remove the text range
  range->GetOwnerParagraph()->GetChildObjects()->Remove(range);
 }

 //Save the result document
 doc->SaveToFile(L"ReplaceWithImage.docx", FileFormat::Docx2013);
 doc->Close();
}

C++: Find and Replace Text in Word Documents

Apply for a Temporary License

If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.

Published in Text

Tagged under

doc cpp Text

Tuesday, 14 March 2023 01:00

C++: Convert PDF to Images

The PDF file format is ideal for most occasions. But still, you may encounter situations where you need to convert PDF to images. Once you convert a certain PDF page into an image, you can post it on social media, upload or transfer it in devices that can only display images, or embed it in your Word document or PowerPoint presentation. In this article, you will learn how to programmatically convert PDF to images in C++ using Spire.PDF for C++.

Convert a Specific Page to an Image
Convert an Entire PDF to Multiple Images

Install Spire.PDF for C++

There are two ways to integrate Spire.PDF for C++ into your application. One way is to install it through NuGet, and the other way is to download the package from our website and copy the libraries into your program. Installation via NuGet is simpler and more recommended. You can find more details by visiting the following link.

Integrate Spire.PDF for C++ in a C++ Application

Convert a Specific Page to an Image in C++

Spire.PDF for C++ offers the PdfDocument->SaveAsImage(int pageIndex) method to convert a particular page into image stream. The stream can be then saved as an image file with the desired extension like PNG, JPG, and BMP. The following are the detailed steps.

Create a PdfDocument instance.
Load a PDF file using PdfDocument->LoadFromFile() method.
Convert a specific page into image stream using PdfDocument->SaveAsImage() method.
Save the image steam as a JPG file using Stream->Save() method.

C++

#include "Spire.Pdf.o.h";

using namespace Spire::Pdf;
using namespace std;

int main() {

	//Specify input and output file paths
	wstring inputFile = L"C:\\Users\\Administrator\\Desktop\\sample.pdf";
	wstring outputFile = L"C:\\Users\\Administrator\\Desktop\\Output\\ToImage";

	//Create a PdfDocument object
	PdfDocument* doc = new PdfDocument();

	//Load a PDF file
	doc->LoadFromFile(inputFile.c_str());

	//Convert a specific page as image
	boost::intrusive_ptr⁢Stream> image = doc->SaveAsImage(0, PdfImageType::Bitmap);

	//Write image to a .jpg file
	wstring fileName = outputFile + L".jpg";
	image->Save(fileName.c_str());

	doc->Close();
	delete doc;
}

C++: Convert PDF to Images

Convert an Entire PDF to Multiple Images in C++

In order to save the whole PDF as separate individual images, you just need to put the conversion part inside a loop statement. The follows are the detailed steps.

Create a PdfDocument instance.
Load a PDF file using PdfDocument->LoadFromFile() method.
Loop through the pages in the document and convert each of them into image stream using PdfDocument->SaveAsImage(int pageIndex) method.
Save the image steam as JPG files using Stream->Save() method.

C++

#include "Spire.Pdf.o.h";

using namespace Spire::Pdf;
using namespace std;

int main() {

	//Specify input and output file paths
	wstring inputFile = L"C:\\Users\\Administrator\\Desktop\\sample.pdf";
	wstring outputFile = L"C:\\Users\\Administrator\\Desktop\\Output\\ToImg-";

	//Create a PdfDocument object
	PdfDocument* doc = new PdfDocument();

	//Load a PDF file
	doc->LoadFromFile(inputFile.c_str());

	//Iterate through the pages in the document
	for (int i = 0; i < doc->GetPages()->GetCount(); i++) {

		//Save a specific page as image
		oost::intrusive_ptr⁢Stream> image = doc->SaveAsImage(i);

		//Write image to a .jpg file
		wstring fileName = outputFile + to_wstring(i) + L".jpg";
		image->Save(fileName.c_str());
	}
	doc->Close();
	delete doc;
}

C++: Convert PDF to Images

Apply for a Temporary License

If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.

Published in Conversion

Tagged under

pdf cpp Conversion

Monday, 13 March 2023 00:59

C++: Convert PowerPoint Presentation to PDF

When you need to share or present your PowerPoint presentations on different computers/devices, you may occasionally find that some content cannot be displayed properly. To avoid such incompatibility issues, a common method is to convert your PowerPoint document to PDF to ensure document integrity. In this article, you will learn how to convert a PowerPoint Presentation to PDF in C++ using Spire.Presentation for C++.

Convert an Entire PowerPoint Presentation to PDF in C++
Convert a Specific PowerPoint Slide to PDF in C++
Convert a PowerPoint to PDF with Specific Page Size in C++

Install Spire.Presentation for C++

There are two ways to integrate Spire.Presentation for C++ into your application. One way is to install it through NuGet, and the other way is to download the package from our website and copy the libraries into your program. Installation via NuGet is simpler and more recommended. You can find more details by visiting the following link.

Integrate Spire.Presentation for C++ in a C++ Application

Convert an Entire PowerPoint Presentation to PDF in C++

The Presentation->SaveToFile(LPCWSTR_S fileName, FileFormat::PDF) method allows you to convert each slide in PowerPoint to a PDF page. The following are the steps to convert a whole PowerPoint presentation to PDF.

Create a Presentation object.
Load a PowerPoint presentation using Presentation->LoadFromFile() method.
Save it to PDF using Presentation->SaveToFile(LPCWSTR_S fileName, FileFormat::PDF) method.

C++

#include "Spire.Presentation.o.h";

using namespace Spire::Presentation;
using namespace std;

int main()
{
	//Specify the input and output file paths
	std::wstring inputFile = L"Data\\sample.pptx";
	std::wstring outputFile = L"Output\\PowerPointToPDF.pdf";

	//Create a Presentation object
	intrusive_ptr⁢Presentation> ppt = new Presentation();

	//Load a PowerPoint document from disk
	ppt->LoadFromFile(inputFile.c_str());

	//Save the document to PDF
	ppt->SaveToFile(outputFile.c_str(), FileFormat::PDF);

	ppt->Dispose();

}

C++: Convert PowerPoint Presentation to PDF

Convert a Specific PowerPoint Slide to PDF in C++

If you only want to convert a particular slide to PDF, you can use the ISlide->SaveToFile(LPCWSTR_S fileName, FileFormat::PDF) method provided by Spire.Presentation for C++. The following are the detailed steps.

Create a Presentation object.
Load a PowerPoint presentation using Presentation->LoadFromFile() method.
Get a specified slide by index using Presentation->GetSlides()->GetItem(slideIndex) method.
Save the slide to PDF using ISlide->SaveToFile(LPCWSTR_S fileName, FileFormat::PDF) method.

C++

#include "Spire.Presentation.o.h";

using namespace Spire::Presentation;
using namespace std;

int main()
{
	//Specify the input and output file paths
	std::wstring inputFile = L"Data\\sample.pptx";
	std::wstring outputFile = L"Output\\SlideToPDF.pdf";

	//Create a Presentation object
	intrusive_ptr⁢Presentation> ppt = new Presentation();

	//Load a PowerPoint document from disk
	ppt->LoadFromFile(inputFile.c_str());

	//Get the second slide
	intrusive_ptr slide = ppt->GetSlides()->GetItem(1);

	//Save the second slide to PDF
	slide->SaveToFile(outputFile.c_str(), FileFormat::PDF);
	ppt->Dispose();
}

C++: Convert PowerPoint Presentation to PDF

Convert a PowerPoint to PDF with Specific Page Size in C++

Spire.Presentation for C++ also allows you to set a desired slide size and orientation for a PowerPoint document before converting it to PDF. The following are the steps to convert a PowerPoint to PDF with Specific Page Size (A4 slide size = 10.83x7.05 inch).

Create a Presentation object.
Load a PowerPoint presentation using Presentation->LoadFromFile() method.
Set the slide size of the PowerPoint document using Presentation->GetSlideSize()->SetType() method.
Set the slide orientation of the PowerPoint document using Presentation->GetSlideSize()->SetOrientation() method.
Save the document to PDF using Presentation->SaveToFile(LPCWSTR_S fileName, FileFormat::PDF) method.

C++

#include "Spire.Presentation.o.h";

using namespace Spire::Presentation;
using namespace std;

int main()
{
	//Specify the input and output file paths
	std::wstring inputFile = L"Data\\sample.pptx";
	std::wstring outputFile = L"Output\\ToPdfWithSpecificPageSize.pdf";

	//Create a Presentation object
	intrusive_ptr⁢Presentation> ppt = new Presentation();

	//Load a PowerPoint document from disk
	ppt->LoadFromFile(inputFile.c_str());

	//Set the slide size to A4
	ppt->GetSlideSize()->SetType(SlideSizeType::A4);

	//Set the slide orientation to Landscape
	ppt->GetSlideSize()->SetOrientation(SlideOrienation::Landscape);

	//Save the document to PDF
	ppt->SaveToFile(outputFile.c_str(), FileFormat::PDF);

	ppt->Dispose();
}

C++: Convert PowerPoint Presentation to PDF

Apply for a Temporary License

If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.

Published in Conversion

Tagged under

ppt cpp Conversion

Friday, 10 March 2023 00:54

C++: Add Image Watermarks to PDF Documents

Watermarks are faded text or images that appear behind the existing content of a document. You can use them to indicate a document's state (confidential, draft, etc.), or add a subtle company logo. A watermark helps prove the origin of a document and discourage unauthorized copies or distribution. In this article, you will learn how to add image watermarks to PDF in C++ using Spire.PDF for C++.

Add a Single Image Watermark to PDF
Add a Tiled Image Watermark to PDF

Install Spire.PDF for C++

There are two ways to integrate Spire.PDF for C++ into your application. One way is to install it through NuGet, and the other way is to download the package from our website and copy the libraries into your program. Installation via NuGet is simpler and more recommended. You can find more details by visiting the following link.

Integrate Spire.PDF for C++ in a C++ Application

Add a Single Image Watermark to PDF in C++

The PdfPageBase->GetCanvas()->DrawImage() method provided by Spire.PDF for C++ allows developers to draw images at any position of a PDF page. The image can be faded by adjusting the transparency of the canvas to prevent it from overwriting the text. The detailed steps to add a single image watermark to PDF are as follows.

Create a PdfDocument object.
Load a sample PDF document using PdfDocument->LoadFromFile() method.
Get a specific page from the document using PdfDocument->GetPages()->GetItem() method.
Set the transparency of the page using PdfPageBase->GetCanvas()->SetTransparency() method.
Draw an image at the center of the page using PdfPageBase->GetCanvas()->DrawImage() method.
Save the document to a different PDF file using PdfDocument->SaveToFile() method.

C++

#include "Spire.Pdf.o.h";

using namespace std;
using namespace Spire::Pdf;

int main()
{
	//Specify input file and output file paths
	wstring inputFilePath = L"C:\\Users\\Administrator\\Desktop\\sample.pdf";
	wstring outputFilePath = L"C:\\Users\\Administrator\\Desktop\\ImageWatermark.pdf";

	//Create a PdfDocument object
	PdfDocument* doc = new PdfDocument();

	//Load a PDF file
	doc->LoadFromFile(inputFilePath.c_str());

	//Load an image
	boost::intrusive_ptr image = PdfImage::FromFile(L"C:\\Users\\Administrator\\Desktop\\logo.png");

	//Get image height and width
	int imgHeight = image->GetHeight();
	int imgWidth = image->GetWidth();

	//Traverse through the pages in the document
	for (size_t i = 0; i < doc->GetPages()->GetCount(); i++)
	{
		//Get a specific page
		boost::intrusive_ptr page = doc->GetPages()->GetItem(i);

		//Set the page transparency
		page->GetCanvas()->SetTransparency(0.5);

		//Get the page width and height
		float pageWidth = page->GetActualSize()->GetWidth();
		float pageHeight = page->GetActualSize()->GetHeight();

		//Draw image at the center of the page
		RectangleF* rect = new RectangleF((float)(pageWidth - imgWidth) / 2, (float)(pageHeight - imgHeight) / 2, imgWidth, imgHeight);
		page->GetCanvas()->DrawImage(image, rect);
	}

	//Save the document
	doc->SaveToFile(outputFilePath.c_str());
	doc->Close();
	delete doc;
}

C++: Add Image Watermarks to PDF Documents

Add a Tiled Image Watermark to PDF in C++

A tiled watermark effect can be achieved by using the PdfTilingBrush class. The tiling brush produces a tiled pattern that is repeated to fill a graphics area. The following are the steps to add a tiled image watermark to a PDF document.

Create a custom method InsertTiledImagetWatermark(PdfPageBase* page, PdfImage* image, int rowNum, int columnNum) to add a tiled watermark to a PDF page. The parameter rowNum and columnNum specify the row number and column number of the tiled watermark.
Create a PdfDocument object.
Load a sample PDF document using PdfDocument->LoadFromFile() method.
Traverse through all pages in the document, and invoke the custom method InsertTiledImageWatermark() to apply watermark to each page.
Save the document to another file using PdfDocument->SaveToFile() method.

C++

#include "Spire.Pdf.o.h";

using namespace std;
using namespace Spire::Pdf;

static void InsertTiledImagetWatermark(PdfPageBase* page, PdfImage* image, int rowNum, int columnNum)
{
	//Get page height and width
	float height = page->GetActualSize()->GetHeight();
	float width = page->GetActualSize()->GetWidth();

	//Get image heigh and width
	float imgHeight = image->GetHeight();
	float imgWidth = image->GetWidth();

	//Create a tiling brush
	PdfTilingBrush* brush = new PdfTilingBrush(new SizeF(width / columnNum, height / rowNum));

	//Set transparency
	brush->GetGraphics()->SetTransparency(0.5f);

	//Translate coordinate system to a certain position
	brush->GetGraphics()->TranslateTransform((brush->GetSize()->GetWidth() - imgWidth) / 2, (brush->GetSize()->GetHeight() - imgHeight) / 2);

	//Draw image on the brush at the specified coordinates
	brush->GetGraphics()->DrawImage(image, 0.0, 0.0);

	//Draw rectangle that covers the whole page with the brush
	page->GetCanvas()->DrawRectangle(brush, 0, 0, width, height);
}

int main()
{
	//Specify input file and output file paths
	wstring inputFilePath = L"C:\\Users\\Administrator\\Desktop\\sample.pdf";
	wstring outputFilePath = L"C:\\Users\\Administrator\\Desktop\\TiledImageWatermark.pdf";

	//Create a PdfDocument object
	PdfDocument* doc = new PdfDocument();

	//Load a PDF file
	doc->LoadFromFile(inputFilePath.c_str());

	//Load an image
	PdfImage* image = PdfImage::FromFile(L"C:\\Users\\Administrator\\Desktop\\small-logo.png");

	//Traverse through the pages in the document
	for (size_t i = 0; i < doc->GetPages()->GetCount(); i++)
	{
		//Get a specific page
		PdfPageBase* page = doc->GetPages()->GetItem(i);

		//Add tiled image watermark to the page
		InsertTiledImagetWatermark(page, image, 4, 4);
	}

	//Save the document
	doc->SaveToFile(outputFilePath.c_str());
	doc->Close();
	delete doc;
}

C++: Add Image Watermarks to PDF Documents

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