C++でPowerPointプレゼンテーションをHTMLに変換

PowerPoint to HTML 変換について

Using Aspose.Slides for C++, applications and developers can convert a PowerPoint presentation to HTML: PPTX to HTML or PPT to HTML.

Aspose.Slides provides many options (mostly from the HtmlOptions class) that define the PowerPoint to HTML conversion process:

PowerPoint プレゼンテーション全体を HTML に変換します。
PowerPoint プレゼンテーションの特定のスライドを HTML に変換します。
プレゼンテーションのメディア（画像、ビデオなど）を HTML に変換します。
PowerPoint プレゼンテーションをレスポンシブ HTML に変換します。
スピーカーノートの有無にかかわらず、PowerPoint プレゼンテーションを HTML に変換します。
コメントの有無にかかわらず、PowerPoint プレゼンテーションを HTML に変換します。
元のフォントまたは埋め込みフォントで PowerPoint プレゼンテーションを HTML に変換します。
新しい CSS スタイルを使用して PowerPoint プレゼンテーションを HTML に変換します。

独自の API を使用して、Aspose は無料のプレゼンテーションから HTML へのコンバータを開発しました: PPT to HTML, PPTX to HTML, ODP to HTML, など。

他の Aspose の無料コンバータもぜひご覧ください。Aspose の無料コンバータ.

Note

ここで説明した変換プロセスに加えて、Aspose.Slides は HTML 形式に関わる以下の変換操作もサポートしています：

PowerPoint を HTML に変換

Using Aspose.Slides, you can convert an entire PowerPoint presentation to HTML this way:

Create an instance of the Presentation class.
- Load .ppt in Presentation class to Convert PPT to HTML in C++
- Load .pptx in Presentation class to Convert PPTX to HTML in C++
- Load .odp in Presentation class to Convert ODP to HTML in C++
Use the Save method to save the object as an HTML file.

// プレゼンテーション ファイルを表す Presentation オブジェクトをインスタンス化します
auto presentation = System::MakeObject<Presentation>(u"Convert_HTML.pptx");
    
auto htmlOpt = System::MakeObject<HtmlOptions>();
htmlOpt->set_HtmlFormatter(HtmlFormatter::CreateDocumentFormatter(u"", false));

// プレゼンテーションを HTML に保存します
presentation->Save(u"ConvertWholePresentationToHTML_out.html", SaveFormat::Html, htmlOpt);

PowerPoint をレスポンシブ HTML に変換

Aspose.Slides provides the ResponsiveHtmlController class that allows you to generate responsive HTML files. This code shows you how to convert a PowerPoint presentation to responsive HTML in C++:

// プレゼンテーション ファイルを表す Presentation オブジェクトをインスタンス化します
auto presentation = System::MakeObject<Presentation>(u"Convert_HTML.pptx");

auto controller = System::MakeObject<ResponsiveHtmlController>();
auto htmlOptions = System::MakeObject<HtmlOptions>();
htmlOptions->set_HtmlFormatter(HtmlFormatter::CreateCustomFormatter(controller));

// プレゼンテーションを HTML に保存します
presentation->Save(u"ConvertPresentationToResponsiveHTML_out.html", SaveFormat::Html, htmlOptions);

PowerPoint をノート付き HTML に変換

This code shows you how to convert a PowerPoint to HTML with notes in C++:

auto pres = System::MakeObject<Presentation>(u"Presentation.pptx");

auto opt = System::MakeObject<HtmlOptions>();

auto options = opt->get_NotesCommentsLayouting();
options->set_NotesPosition(NotesPositions::BottomFull);

// ノートページを保存
pres->Save(u"Output.html", SaveFormat::Html, opt);

PowerPoint を元フォント付き HTML に変換

Aspose.Slides provides the EmbedAllFontsHtmlController class that allows you to embed all the fonts in a presentation while converting the presentation to HTML.

To prevent certain fonts from being embedded, you can pass an array of font names to a parameterized constructor from the EmbedAllFontsHtmlController class. Popular fonts, such as Calibri or Arial, when used in a presentation, do not have to be embedded because most systems already contain such fonts. When those fonts are embedded, the resulting HTML document becomes unnecessarily large.

The EmbedAllFontsHtmlController class supports inheritance and provides the WriteFont method, which is meant to be overwritten.

auto pres = System::MakeObject<Presentation>(u"input.pptx");

// デフォルトのプレゼンテーションフォントを除外する
auto fontNameExcludeList = System::MakeArray<System::String>({ u"Calibri", u"Arial" });

auto embedFontsController = System::MakeObject<EmbedAllFontsHtmlController>(fontNameExcludeList);

auto htmlOptionsEmbed = System::MakeObject<HtmlOptions>();
htmlOptionsEmbed->set_HtmlFormatter(HtmlFormatter::CreateCustomFormatter(embedFontsController));

pres->Save(u"input-PFDinDisplayPro-Regular-installed.html", SaveFormat::Html, htmlOptionsEmbed);

PowerPoint を高品質画像付き HTML に変換

By default, when you convert PowerPoint to HTML, Aspose.Slides outputs small HTML with images at 72 DPI and deleted cropped areas. To obtain HTML files with higher quality images, you have to set the PicturesCompression property (from the HtmlOptions class) to 96 (i.e., PicturesCompression::Dpi96) or higher values.

This C++ code shows you how to convert a PowerPoint presentation to HTML while obtaining high quality images at 150 DPI (i.e. PicturesCompression::Dpi150):

auto pres = System::MakeObject<Presentation>(u"InputDoc.pptx");

auto htmlOpts = System::MakeObject<HtmlOptions>();
htmlOpts->set_PicturesCompression(PicturesCompression::Dpi150);

pres->Save(u"OutputDoc-dpi150.html", SaveFormat::Html, htmlOpts);

This code in C++ shows you how to output HTML with full quality images:

auto pres = System::MakeObject<Presentation>(u"InputDoc.pptx");

auto htmlOpts = System::MakeObject<HtmlOptions>();
htmlOpts->set_DeletePicturesCroppedAreas(false);

pres->Save(u"Outputdoc-noCrop.html", SaveFormat::Html, htmlOpts);

スライドを HTML に変換

To convert a specific slide in a PowerPoint to HTML, you have to instantiate the same Presentation class (used to convert entire presentations to HTML) and then use the Save method to save the file as HTML. The HtmlOptions class can be used to specify additional conversion options:

This C++ code shows you how to convert a slide in a PowerPoint presentation to HTML:

class CustomFormattingController : public IHtmlFormattingController
{
public:
    void WriteDocumentStart(SharedPtr<IHtmlGenerator> generator, SharedPtr<IPresentation> presentation) override{}
    void WriteDocumentEnd(SharedPtr<IHtmlGenerator> generator, SharedPtr<IPresentation> presentation) override{}
    void WriteSlideStart(SharedPtr<IHtmlGenerator> generator, SharedPtr<ISlide> slide) override
    {
        generator->AddHtml(String::Format(SlideHeader, generator->get_SlideIndex() + 1));
    }
    void WriteSlideEnd(SharedPtr<IHtmlGenerator> generator, SharedPtr<ISlide> slide) override
    {
        generator->AddHtml(SlideFooter);
    }
    void WriteShapeStart(SharedPtr<IHtmlGenerator> generator, SharedPtr<IShape> shape) override{}
    void WriteShapeEnd(SharedPtr<IHtmlGenerator> generator, SharedPtr<IShape> shape) override{}

private:
    static const String SlideHeader;
    static const String SlideFooter;
};

const String CustomFormattingController::SlideHeader = u"<div class=\"slide\" name=\"slide\" id=\"slide{0}\">";
const String CustomFormattingController::SlideFooter = u"</div>";

void Run()
{
    String dataDir = GetDataPath();
    
    auto presentation = System::MakeObject<Presentation>(dataDir + u"Individual-Slide.pptx");

    auto formatter = HtmlFormatter::CreateCustomFormatter(MakeObject<CustomFormattingController>();
    auto htmlOptions = System::MakeObject<HtmlOptions>();
    htmlOptions->set_HtmlFormatter(formatter);

    // ファイルを保存              
    for (int32_t i = 0; i < presentation->get_Slides()->get_Count(); i++)
    {
        presentation->Save(dataDir + u"Individual Slide" + (i + 1) + u"_out.html", 
            MakeArray<int32_t>({ i + 1 }), SaveFormat::Html, htmlOptions);
    }
}

HTML エクスポート時に CSS と画像を保存

Using new CSS style files, you can easily change the style of the HTML file resulting from the PowerPoint to HTML conversion process.

The C++ code in this example shows you how to use overridable methods to create a custom HTML document with a link to a CSS file:

class CustomHeaderAndFontsController : public EmbedAllFontsHtmlController
{
public:
    CustomHeaderAndFontsController(String cssFileName)
        : m_cssFileName(cssFileName)
    {
    }

    void WriteDocumentStart(SharedPtr<IHtmlGenerator> generator, SharedPtr<IPresentation> presentation) override
    {
        generator->AddHtml(System::String::Format(Header, m_cssFileName));
        WriteAllFonts(generator, presentation);
    }

    void WriteAllFonts(SharedPtr<IHtmlGenerator> generator, SharedPtr<IPresentation> presentation) override
    {
        generator->AddHtml(u"<!-- Embedded fonts -->");
        EmbedAllFontsHtmlController::WriteAllFonts(generator, presentation);
    }

private:
    static const String Header;
    String m_cssFileName;
};

const String CustomHeaderAndFontsController::Header = String(u"<!DOCTYPE html>\n") + 
u"<html>\n" + u"<head>\n" + 
u"<meta http-equiv=\"Content-Type\" content=\"text/html;charset=UTF-8\">\n" + 
u"<meta http-equiv=\"X-UA-Compatible\" content=\"IE=9\">\n" + 
u"<link rel=\"stylesheet\" type=\"text/css\" href=\"{0}\">\n" + u"</head>";

void Run()
{
    // ドキュメントディレクトリへのパス。
    System::String dataDir = GetDataPath();

    auto pres = System::MakeObject<Presentation>(u"pres.pptx");

    auto htmlController = System::MakeObject<CustomHeaderAndFontsController>(u"styles.css");
    auto options = System::MakeObject<HtmlOptions>();
    options->set_HtmlFormatter(HtmlFormatter::CreateCustomFormatter(htmlController));
    pres->Save(u"pres.html", SaveFormat::Html, options);
}

プレゼンテーションを HTML に変換する際にすべてのフォントをリンク

If you do not want to embed fonts (to avoid increasing the size of the resulting HTML), you can link all fonts by implementing your own LinkAllFontsHtmlController version.

This C++ code shows you how to convert a PowerPoint to HTML while linking all fonts and excluding “Calibri” and “Arial” (since they already exist in the system):

class LinkAllFontsHtmlController : public EmbedAllFontsHtmlController
{
public:
    LinkAllFontsHtmlController(ArrayPtr<String> fontNameExcludeList, String basePath)
        :   EmbedAllFontsHtmlController(fontNameExcludeList)
    {
        m_basePath = basePath;
    }

    void WriteFont(SharedPtr<IHtmlGenerator> generator, SharedPtr<IFontData> originalFont, SharedPtr<IFontData> substitutedFont,
        String fontStyle, String fontWeight, ArrayPtr<uint8_t> fontData)
    {
        String fontName = substitutedFont == nullptr ? originalFont->get_FontName() : substitutedFont->get_FontName();
        String path = String::Format(u"{0}.woff", fontName); // パスのサニタイズが必要になる場合があります
        IO::File::WriteAllBytes(IO::Path::Combine(m_basePath, path), fontData);

        generator->AddHtml(u"<style>");
        generator->AddHtml(u"@font-face { ");
        generator->AddHtml(String::Format(u"font-family: '{0}'; ", fontName));
        generator->AddHtml(String::Format(u"src: url('{0}')", path));

        generator->AddHtml(u" }");
        generator->AddHtml(u"</style>");
    }

private:
    String m_basePath;
};

void Run()
{
    auto pres = System::MakeObject<Presentation>(u"pres.pptx");

    // デフォルトのプレゼンテーションフォントを除外
    auto fontNameExcludeList = System::MakeArray<String>({ u"Calibri", u"Arial" });
    
    auto linkcont = System::MakeObject<LinkAllFontsHtmlController>(fontNameExcludeList, u"C://Windows//Fonts//");

    System::SharedPtr<HtmlOptions> htmlOptionsEmbed = System::MakeObject<HtmlOptions>();
    htmlOptionsEmbed->set_HtmlFormatter(HtmlFormatter::CreateCustomFormatter(linkcont));
    
    pres->Save(u"pres.html", SaveFormat::Html, htmlOptionsEmbed);
}

PowerPoint をレスポンシブ HTML に変換

This C++ code shows you how to convert a PowerPoint presentation to responsive HTML:

auto presentation = System::MakeObject<Presentation>(u"SomePresentation.pptx");
auto saveOptions = System::MakeObject<HtmlOptions>();
saveOptions->set_SvgResponsiveLayout(true);
presentation->Save(u"SomePresentation-out.html", SaveFormat::Html, saveOptions);

メディアファイルを HTML にエクスポート

Using Aspose.Slides for C++, you can export media files this way:

Create an instance of the Presentation class.
Get a reference to the slide.
Add a video to the slide.
Write the presentation as a HTML file.

This C++ code shows you how to add a video to the presentation and then save it as HTML:

 // プレゼンテーションをロードします
auto pres = System::MakeObject<Presentation>();

const System::String path = u"C:/out/";
const System::String fileName = u"ExportMediaFiles_out.html";
const System::String baseUri = u"http://www.example.com/";

auto fileStream = System::MakeObject<IO::FileStream>(u"my_video.avi", IO::FileMode::Open, IO::FileAccess::Read);

auto video = pres->get_Videos()->AddVideo(fileStream, Aspose::Slides::LoadingStreamBehavior::ReadStreamAndRelease);

auto slide = pres->get_Slides()->idx_get(0);
slide->get_Shapes()->AddVideoFrame(10.0f, 10.0f, 100.0f, 100.0f, video);

auto controller = System::MakeObject<VideoPlayerHtmlController>(path, fileName, baseUri);

// HTML オプションを設定します
auto htmlOptions = System::MakeObject<HtmlOptions>(controller);
auto svgOptions = System::MakeObject<SVGOptions>(controller);

htmlOptions->set_HtmlFormatter(HtmlFormatter::CreateCustomFormatter(controller));
htmlOptions->set_SlideImageFormat(SlideImageFormat::Svg(svgOptions));

// ファイルを保存します
pres->Save(IO::Path::Combine(path, fileName), SaveFormat::Html, htmlOptions);

FAQ

What is the performance of Aspose.Slides when converting multiple presentations to HTML?

Performance depends on the size and complexity of presentations. Aspose.Slides is highly efficient and scalable for batch operations. To achieve optimal performance when converting many presentations, it’s recommended to use multithreading or parallel processing whenever possible.

Does Aspose.Slides support exporting hyperlinks to HTML?

Yes, Aspose.Slides fully supports exporting embedded hyperlinks to HTML. When you convert presentations to HTML format, hyperlinks are preserved automatically and remain clickable.

Is there any limit on the number of slides when converting presentations to HTML?

There is no limit on the number of slides when using Aspose.Slides. You can convert presentations of any size. However, for presentations containing a very large number of slides, performance may depend on the available resources of your server or system.

C++ で PPTX を PPT に変換 C++でPPTおよびPPTXをPDFに変換（高度な機能を含む）